JP2013095297A - Holding structure of linear member in semi-trailer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange a linear member from a main frame to a bogie frame which relatively moves with respect to the main frame, and hold the linear member.SOLUTION: A chain-like wiring duct 201 is arranged between right and left bogie beams 7, and permits relative movement in the front-back direction between one end 201a and the other end 201b by movement of a turn-back position 202 in an intermediate deformation part 201c between the one end 201a and the other end 201b. The one end 201a of the chain-like wiring duct 201 is arranged between rear ends of right and left main beams 4, and the other end 201b of the chain-like wiring duct 201 is fixed with respect to a bogie frame 6. A linear member 200 is arranged from the front end of a main frame 3 to the rear end thereof, held to the rear end of the main frame 3, arranged from the one end 201a of the chain-like wiring duct 201 to the other end 201b along the intermediate deformation part 201c, and held to the chain-like wiring duct 201.

Description

  The present invention relates to a holding structure for a linear member in a semi-trailer, and more particularly to a holding structure for a linear member such as a tube for air piping or an electric cable in a semi-trailer capable of changing a wheel base.

  In general, the trailer is equipped with air piping for operating the brake and electrical wiring for taillights, width lights, etc., and the air pressure and electricity for operating these are connected to the front of the trailer. Supplied from the tractor. Therefore, the air piping and electrical wiring of the trailer are routed from the front end portion to the rear end portion of the trailer.

JP-A-11-216585

  However, when the semi-trailer chassis frame is divided into a front main frame connected to the tractor and a rear bogie frame supported by wheels, and the main frame and the bogie frame are slidably connected, In order to route a linear member such as air piping or electrical wiring from the front end of the frame to the rear end of the bogie frame, the linear member is held so as to allow relative movement between the main frame and the bogie frame. The conventional holding structure cannot cope with this.

  In view of the above situation, the present invention has an object to route and hold a linear member from a relatively moving main frame to a bogie frame.

  In order to achieve the above object, the present invention is a linear member holding structure in a semi-trailer provided with a front main frame, a rear bogie frame, and a connecting mechanism, and includes a chain-like holding member.

  The main frame has a pair of left and right main beams extending in the front-rear direction, and is pulled by being connected to the tractor. The bogie frame has a pair of left and right bogie beams that extend along the front-rear direction and support the left and right main beams so as to be slidable in the front-rear direction, and is supported from below by wheels. The connection mechanism releasably connects the left and right main beams and the left and right bogie beams at each of a plurality of predetermined positions at which the main frame and the bogie frame have different relative positions in the front-rear direction.

  The chain-shaped holding member is disposed between the left and right bogie beams, has an intermediate deformation portion that extends forward from one end portion and is folded back and extends to the other rear end portion, and the folding position in the intermediate deformation portion is the one end portion. By moving between the other end, the relative movement in the front-rear direction between the one end and the other end is allowed.

  One end portion of the chain-shaped holding member is disposed between the rear end portions of the left and right main beams, and the other end portion of the chain-shaped holding member is fixed to the bogie frame. The linear member is routed from the front end portion of the main frame to the rear end portion, held at the rear end portion of the main frame, and routed from one end portion of the chain-like holding member to the other end portion along the intermediate deformation portion. And is held by the chain-shaped holding member.

  In the above configuration, the connection between the main beam and the bogie beam by the connection mechanism is released, and the relative position in the front-rear direction between the main frame and the bogie frame is changed from one predetermined position to another predetermined position, and then the main mechanism is operated by the connection mechanism. By connecting the beam and the bogie beam again, it is possible to change to a suitable wheel base corresponding to the total length of the container to be loaded and travel. Therefore, it is possible to distribute the load in a well-balanced manner to each axle and suppress the concentration of the load on one axle.

  Further, when the main frame moves forward with respect to the bogie frame, the linear member on the main frame side also moves forward, and the portion of the linear member held at the rear end of the main frame moves forward. One end of the chain-shaped holding member is pulled forward. Since the intermediate deforming portion of the chain-shaped holding member allows relative movement in the front-rear direction between the one end portion and the other end portion, the one end portion moves forward while the position of the other end portion with respect to the bogie frame is maintained. On the other hand, when the main frame moves backward with respect to the bogie frame, the linear member on the main frame side also moves backward, and the portion of the linear member held at the rear end of the main frame moves backward. As a result, one end of the chain-shaped holding member is pulled backward. Since the intermediate deformation part of the chain-shaped holding member allows relative movement in the front-rear direction between the one end part and the other end part, the one end part moves rearward while maintaining the position of the other end part with respect to the bogie frame. Therefore, in the semi-trailer in which the main frame and the bogie frame are slidably coupled, the linear member can be held on the main frame and the bogie frame so as to allow relative movement between the main frame and the bogie frame.

  A support member having a substantially horizontal flat support surface and a pair of left and right side surfaces that stand up and oppose from the left and right side edges of the support surface is disposed between the left and right bogie beams to form a bogie frame. May be fixed against. The chain-shaped holding member is supported by one of the pair of side surfaces of the support member at the outer side in the vehicle width direction of the intermediate deforming portion that extends rearward from the folded position toward the one end, and from the folded position toward the other end. The vehicle is mounted on the support surface of the support member in a state where the vehicle width direction outer side of the portion extending rearward is supported by the other of the pair of side surfaces of the support member.

  In the above configuration, since the intermediate deformation portion of the chain-shaped holding member is folded back in the vehicle width direction, an increase in the arrangement space in the height direction of the chain-shaped holding member can be suppressed, and the height between the main frame and the bogie frame can be suppressed. Even when the vertical gap is narrow, it is possible to prevent interference between the main frame and the chain-shaped holding member.

  Further, since the chain-shaped holding member is placed on the support surface of the support member, and the intermediate deformation portion is supported by the left and right side surfaces on the left and right sides of the folding position, respectively, the relative movement between the one end portion and the other end portion is achieved. It is possible to stabilize the deformation behavior of the intermediate deformation portion.

  According to the present invention, it is possible to route and hold the linear member from the main frame that moves relative to the bogie frame.

It is a top view which shows the semi-trailer (shortest) of one Embodiment of this invention. It is a top view which shows the state which extended the semitrailer from the shortest length. It is a side view of the semi-trailer (shortest) at the time of rear end alignment which loaded a 20ft container. It is a side view of the semi-trailer (intermediate length) at the time of driving | running | working which loaded the 20ft container. It is a side view of the semi-trailer (intermediate length) which loaded the 40ft container. It is a side view of the semi-trailer (longest) which loaded the 45ft container. It is a figure which shows a main frame, (a) is a top view, (b) is a side view. It is a figure which shows a bogie frame, (a) is a top view, (b) is a side view. It is a top view of the rear-end part of a main frame. It is XX arrow sectional drawing of FIG. It is a top view of the front-end part of a bogie frame. It is XII-XII arrow sectional drawing of FIG. It is a top view which shows a main connection mechanism. It is a top view which shows the rear-end part of a bogie frame, and an expansion-contraction beam. It is a top view which shows an expansion-contraction beam connection mechanism. It is XVI-XVI arrow directional cross-sectional view of FIG. It is a side view of a telescopic beam. It is a top view explaining the fixed position of an expansion-contraction beam, (a) has shown the accommodation position, (b) has shown the 1st protrusion position, (c) has shown the 2nd protrusion position, respectively. It is a side view which shows a rush prevention apparatus. It is sectional drawing which shows the fastening device for small rear sides. It is sectional drawing which shows the large sized fastening device for rear sides. It is XXII-XXII arrow sectional drawing of FIG. It is XXIII-XXIII arrow sectional drawing of FIG. It is a top view which shows the chain-shaped wiring duct in the shortest position. It is a top view which shows the chain-shaped wiring duct in the longest position. It is a front view which shows the chain-shaped wiring duct supported by the peripheral device support plate.

  An embodiment of the present invention will be described with reference to the drawings. In each figure, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. In the following description, unless otherwise specified, the left-right direction means the left-right direction with the vehicle facing forward.

  As shown in FIGS. 3 to 6, the semi-trailer 1 of the present embodiment includes a 20 ft container (small container) 20 whose front and rear length is set to 20 feet, and a 40 ft container (first container) set to 40 feet. This is a dual-purpose trailer capable of selectively loading a large container 25 and a 45 ft container (second large container) 30 set to 45 feet, and is pulled by being connected to a tractor (not shown).

  These containers 20, 25, and 30 are both box-type, and the rear surfaces of the containers 20, 25, and 30 are closed by doors (not shown) that open to the left and right to open the interior of the containers. ing. Front corner fittings 21, 26, 31 and rear corner fittings 22, 27, 32 are fixed to the front lower corners and rear lower corners of the containers 20, 25, 30, respectively.

  Engagement holes (not shown) that open downward are provided in the front and rear corner fittings 21 and 22 of the 20ft container 20, respectively. The front corner fittings 26 and 31 of the 40 ft container 25 and the 45 ft container 30 are provided with engagement holes (not shown) opening forward, and the rear corner fittings 27 and 32 are engaging downward. A hole (not shown) is provided. A corner bracket 33 at an intermediate position is fixed to the side edge of the rear bottom side of the 45 ft container 30, and an engagement hole (not shown) that opens downward on the corner bracket 33 in the same manner as the corner bracket 32 on the rear side. Is provided. A concave tunnel recess (not shown) for absorbing a step 16 of the main frame 3 to be described later is provided at the approximate center in the vehicle width direction of the front portion of each bottom of the 40 ft container 25 and 45 ft container 30. ing. On the other hand, no tunnel recess is provided at the bottom of the 20 ft container 20.

  As shown in FIGS. 1 to 8, the chassis frame 2 of the semi-trailer 1 includes a front main frame 3 and a rear bogie frame 6.

  The main frame 3 includes a pair of left and right main beams 4 extending substantially in parallel along the vehicle front-rear direction, and a plurality of linear cross frames 5 that connect the left and right main beams 4 together. The main beam 4 has an I-shaped cross section in which a plate-like upper flange 4a and a lower flange 4b opposed to each other in the vertical direction are connected by a web 4c extending vertically (see FIG. 10).

  A rectangular flat apron plate 9 is fixed to the front ends of the left and right main beams 4. The left and right side portions of the apron plate 9 are coupled to the lower flanges 4 b of the left and right main beams 4, and the front end portions of the left and right main beams 4 are covered with the apron plate 9. A king pin 15 protrudes from the lower surface of the apron plate 9 substantially in the center in the vehicle width direction. The king pin 15 is releasably connected to a coupler (not shown) of a tractor that pulls the semi-trailer 1. In addition, in order to arrange the king pin 15 according to the height corresponding to the coupler of the tractor, the front end portion of the main beam 4 is raised by a step 16 called a gooseneck. Further, a support leg (jack device) 17 for supporting the chassis frame 2 separated from the tractor is attached immediately behind the step 16 of the main frame 3.

  A front bolster 40 extending in the vehicle width direction above the front end of the apron plate 9 is fixed to the front end portions of the left and right main beams 4, and the left and right ends of the front bolster 40 protrude from the main beams 4 outward in the vehicle width direction. It extends. A pair of left and right container guides 39 are fixed to the upper surface of the front bolster 40. The container guide 39 guides the lower portions of the front ends of the containers 25 and 30 to a predetermined front and rear position when the containers 25 and 30 are loaded on the semi-trailer 1.

  Upper rear bolsters 50 extending in the vehicle width direction are fixed to the rear ends of the left and right main beams 4, and the left and right ends of the upper rear bolster 50 extend from the main beams 4 so as to protrude outward in the vehicle width direction. An intermediate bolster 60 is fixed to an intermediate portion of the left and right main beams 4 (immediately behind the step 16), and both left and right ends of the intermediate bolster 60 protrude from the main beams 4 so as to protrude outward in the vehicle width direction. .

  A large container front tightening device (hereinafter referred to as a large front tightening device) 41 is attached to the left and right ends of the front bolster 40. Small container rear tightening devices (hereinafter referred to as small rear tightening devices) 51 are attached to the left and right ends of the upper rear bolster 50. A small container front tightening device (hereinafter referred to as a small front tightening device) 61 is attached to the left and right ends of the intermediate bolster 60. The small rear side tightening device 51 and the small front side tightening device 61 are configured in the same manner, and each tightening device 51, 61 protrudes upward from the upper surface of each bolster 50, 60 and descends from the use position. In addition, a twist lock 52 that can be raised and lowered between the storage positions accommodated in the bolsters 50 and 60 is provided. When the 20ft container 20 is loaded, the twist lock 52 is set to the use position, and when the 40ft container 25 and the 45ft container 30 are loaded, the twist lock 52 is set to the storage position.

  The bogie frame 6 includes a pair of left and right bogie beams 7 that extend substantially parallel to the front-rear direction on the outside of the left and right main beams 4 in the vehicle width direction, and a cross frame 8 that connects the left and right bogie frames 7 together. A pair of left and right telescopic beams 12 are supported at the rear ends of the left and right bogie beams 7 so as to be slidable in the front-rear direction.

  The left and right bogie beams 7 are set to have an overall length slightly shorter than a region behind the step 18 in the main beam 4 (hereinafter referred to as a gooseneck rear region). Are slidably supported from below. The region excluding the front end portion of the bogie beam 7 is formed by an inner plate 7c and an outer plate 7d, which are opposed to each other with a plate-like upper plate 7a and a lower plate 7b that are spaced apart from each other in the vehicle width direction. The front end portion of the bogie beam 7 has a T-shaped cross section in which the web 7f extends downward from an upper flange 7e continuous with the upper plate 7a (see FIG. 12). Wheels (tires) 11 are mounted on the bogie frame 6 via a suspension device 10 and three axles (not shown), and the bogie frame 6 is supported by the wheels 11 from below.

  The left and right telescopic beams 12 are, by the telescopic beam coupling mechanism 150 described later, a front storage position, a first projecting position behind the storage position, and a second projecting position behind the first projecting position. Are fixedly supported at any one of the positions. A lower rear bolster 70 extending in the vehicle width direction is fixed to the rear end portions of the left and right telescopic beams 12, and the left and right ends of the lower rear bolster 70 extend from the respective telescopic beams 12 so as to protrude outward in the vehicle width direction. Large container rear tightening devices (hereinafter referred to as large rear tightening devices) 71 are attached to the left and right ends of the lower rear bolster 70. The large rear tightening device 71 is rotatable between a use position protruding upward from the upper surface of the lower rear bolster 70 and a retracted position tilted from the standing position.

  An intrusion prevention device 80 is supported at the lower part of the lower rear bolster 70 so as to be slidable in the front-rear direction. The rush preventing device 80 is fixedly supported at either the front housing position or the rear protruding position.

  The total length of the chassis frame 2 is shortest in the maximum overlap state in which the telescopic beam 12 is supported at the storage position and the front and rear positions of the rear end of the main beam 4 and the rear end of the bogie beam 7 are substantially coincident. It is possible to project forward with respect to the bogie frame 6 from the maximum overlap state. The entire length of the chassis frame 2 is extended by the forward projection of the main frame 3, and the wheel base (the distance between the axle of the front wheel attached to the tractor and the axle of the rear wheel 11 attached to the bogie frame 6). Is changed. In the maximum overlapping state, the large rear tightening device 71 is set to the retracted position, and the upper rear bolster 50 overlaps above the lower rear bolster 70.

  The left and right main beams 4 and the left and right bogie beams 7 are separated by a main connection mechanism (connection mechanism) 130 described later at each of a plurality of predetermined positions where the main frame 3 and the bogie frame 6 have different relative positions in the front-rear direction. It is connected releasably. In the present embodiment, as a plurality of predetermined positions where the coupling mechanism couples both the frames 3 and 6, the shortened position (shortest position) where the maximum overlap state (the total length of both beams 4 and 7 is shortest) and the both beams 4 are combined. , 7 has a first extension position where the total length of the beams 7 is longer than the shortest length by a first predetermined distance, and a second extension position where the total length of both beams 4, 7 is longer than the shortest length by a second predetermined distance (> first predetermined distance). Extension position (longest position) is set. When the wheel base is changed (the main frame 3 is moved in the front-rear direction with respect to the bogie frame 6), the tractor is connected to the main frame 3, the main connection mechanism 130 is released, and braking force is applied to the wheels 11. The tractor is moved forward or backward while the brakes of the wheels 11 are being operated.

  As shown in FIG. 3, when loading a 20 ft container 20, the front corner fitting 21 of the container 20 is fastened by a small front fastening device 61, and the rear corner fitting 22 is fastened by a small rear fastening device 51. To do. That is, the distance between the small front side tightening device 61 and the small rear side tightening device 51 is set to be approximately equal to the distance between the front corner fitting 21 and the rear corner fitting 22 of the 20 ft container 20.

  When loading and unloading the 20ft container 20 and loading / unloading with the platform 19 (when 20ft rear end is aligned), the total length of both beams 4 and 7 is set to the shortest, the telescopic beam 12 is set to the storage position, and the inrush prevention device 80 Is the storage position. Thereby, the rear end of the semi-trailer 1 can be brought close to or in contact with the platform 19 to load / unload the load.

  As shown in FIG. 4, when the 20ft container 20 is loaded and traveled (20ft travel), the main beam 4 is pulled forward from the 20ft rear end alignment, and the total length of both beams 4 and 7 is set to the first predetermined length. And The telescopic beam 12 is maintained in the storage position, and the inrush prevention device 80 is maintained in the storage position. By setting the total length of both beams 4 and 7 to the first predetermined length, the load is distributed in a balanced manner to each axle, and the concentration of the load on one axle is suppressed.

  As shown in FIG. 5, when the 40ft container 25 is loaded, the total length of both beams 4 and 7 is set to the first predetermined length, the telescopic beam 12 is set to the second protruding position, and the rush preventing device 80 is set to the receiving position. . Further, the front corner fitting 26 of the container 25 is fastened by the large front fastening device 41, and the rear corner fitting 27 is fastened by the large rear fastening device 71. That is, the amount of protrusion from the retracted position of the telescopic beam 12 to the second protruding position is the total length of both beams 4 and 7 based on the distance between the front corner fitting 26 and the rear corner fitting 27 of the 40 ft container 25. The distance between the large front-side tightening device 41 and the large rear-side tightening device 71 when the predetermined length is 1 is set to be substantially equal to the distance.

  As shown in FIG. 6, when the 45 ft container 30 is loaded, the total length of both beams 4 and 7 is set to the second predetermined length (longest), the telescopic beam 12 is set to the first protruding position, and the intrusion prevention device 80 is protruded. Position. Further, the front corner fitting 31 of the container 30 is fastened by a large front fastening device 41, and the intermediate corner fitting 33 is fastened by a large rear fastening device 71. That is, the amount of protrusion from the retracted position of the telescopic beam 12 to the first protruding position is the total length of both beams 4 and 7 based on the distance between the front corner fitting 31 and the intermediate corner fitting 33 of the 45 ft container 30. 2 is set to be approximately equal to the distance obtained by subtracting the distance between the large front side fastening device 41 and the large rear side fastening device 71. When loading the 40 ft container 25 and 45 ft container 30, by setting the total length of both beams 4 and 7 and the telescopic beam 12 as described above, as in the case of 20 ft container traveling, Thus, the load is distributed in a well-balanced manner, and the concentration of the load on one axle is suppressed.

  Next, a structure for supporting the main beam 4 so as to be slidable by the bogie beam 7 will be described with reference to FIGS.

  A pair of left and right rear guide rollers 110 are provided at the rear end of the main frame 3, and a pair of left and right front guide rollers 120 are provided at the front end of the bogie frame 6.

  At the rear end of the main frame 3, a cross frame 5 extending in the vehicle width direction in front of the upper rear bolster 50 and a set of two roller support plates 111 arranged on the left and right are provided. The left and right end portions of the cross frame 5 protrude outward in the vehicle width direction from the main beam 3, and the left and right roller support plates 111 stand facing each other along the vehicle front-rear direction, and the upper rear bolster 50 and the cross frame 5 Are connected. The rear guide roller 110 is disposed between the two roller support plates 111 and is supported from the left and right by the roller support plate 111 so as to be rotatable about a rotation shaft 112 along the vehicle width direction. The lower part of each rear guide roller 110 protrudes downward from the lower end of the roller support plate 111 and comes into contact with the upper surfaces of the left and right bogie beams 7 from above. In the present embodiment, a long plate-like guide plate 113 constituting a part of the upper surface is attached to the upper surface of the upper plate 7 a of the left and right bogie beams 7, and the outer peripheral surface of the roller support plate 111 is the guide plate 113. It rotates (rolls) while contacting the top surface. The guide plate 113 is disposed over the entire moving range of the rear guide roller 110 in the front-rear direction range of the upper surface of the upper plate 7a.

  The front end portion of the bogie frame 6 is provided with two cross frames 8 extending substantially in parallel along the vehicle width direction and a set of two roller support plates 121 arranged on the left and right. The left and right roller support plates 121 stand opposite to each other along the vehicle front-rear direction and connect the two cross frames 8 together. The front guide roller 120 is disposed between the two roller support plates 121 and is supported from the left and right by the roller support plates 121 so as to be rotatable about a rotation shaft 122 along the vehicle width direction. The upper part of each front guide roller 120 protrudes upward from the upper end of the roller support plate 121 and rotates while coming into contact with the lower surfaces of the left and right main beams 4 from below.

  The bogie beam 7 supports the left and right of the rear end portion of the main beam 4 and the left and right of the front end portion from below through the rear guide roller 110 and the front guide roller 120 so as to be slidable in the front-rear direction.

  A pair of left and right guide rails 125 extending in the front-rear direction are fixed via a plurality of brackets 126 to the inner surface in the vehicle width direction of the inner plate 7c, which is the inner side in the vehicle width direction of the left and right bogie beams 7, respectively. Yes. The upper surface of the lower flange 4b of the left and right main beams 4 on the outer side in the vehicle width direction from the web 4c functions as a pair of left and right upper movement restriction surfaces 127 extending in the front-rear direction near the lower side of the left and right guide rails 125. The upward movement of the main frame 2 relative to the bogie frame 6 is restricted by the upper movement restriction surface 127 coming into contact with the guide rail 125 from below. The guide rail 125 is disposed over substantially the entire region of the bogie beam 7 in the front-rear direction.

  A pair of left and right stopper plates 128 extending in the front-rear direction are fixed to the outer surface in the vehicle width direction of the web 4c, which is the lateral side of the left and right main beams 4 in the vehicle width direction. The outer surfaces in the vehicle width direction of the left and right stopper plates 128 function as lateral movement restricting surfaces 129 extending in the front-rear direction near the inner side in the vehicle width direction of the guide rail 125. The movement of the main frame 3 in the vehicle width direction relative to the bogie frame 6 is restricted by the lateral movement restriction surface 129 coming into contact with the guide rail 125 from the inside in the vehicle width direction.

  Next, the main coupling mechanism 130 will be described with reference to FIGS. 7, 12, and 13.

  The main coupling mechanism 130 includes three pin insertion holes 131 (see FIG. 7) having different front and rear positions (see FIG. 7), a pair of left and right lock pin devices 132, an air chamber (drive means) 133, The link mechanism 134 and the case body 135 are provided and arranged at the front end of the bogie frame 6. The three lock pin insertion holes 131 are formed in the web 4c at predetermined positions in the front-rear direction of the main beam 4 corresponding to the shortest position, the first extension position, and the second extension position, respectively. The frontmost lock pin insertion hole 131 corresponds to the shortened position, the rearmost lock pin insertion hole 131 corresponds to the second extended position, and the lock pin insertion hole 131 therebetween corresponds to the first extended position. The case body 135 is disposed between the left and right main beams 4 and is supported by the left and right bogie beams 7 via the cross frame 8. The main part of the lock pin device 132 and the link mechanism 134 are accommodated in the case body 135.

  The lock pin device 132 includes a housing 136, a lock pin 137, and a coil spring (biasing means) 138. The housing 136 has a cylindrical shape, and is fixed to the side wall of the case body 135 on the outer side in the vehicle width direction with the end portion on the outer side in the vehicle width direction penetrating the case body 135. The lock pin 137 protrudes from the end of the housing 136 in the vehicle width direction outside to the vehicle width direction outside and passes through the lock pin insertion hole 131, and moves from the lock position to the vehicle width direction inside to enter the lock pin insertion hole. It is supported by the housing 136 so as to be slidable along the vehicle width direction between the unlock position and the unlock position. The coil spring 138 biases the lock pin 137 to the lock position. A tip end of a pin shaft portion 139 extending inward in the vehicle width direction from the lock pin 137 protrudes from the housing 136.

  The main beam 4 and the bogie beam 7 are fixed at a shortened position by inserting the lock pin 137 through the foremost pin insertion hole 131 of the three pin insertion holes 131 and lock the rearmost pin insertion hole 131. When the pin 137 is inserted, the pin is fixed at the second extended position, and when the lock pin 137 is inserted through the pin insertion hole 131 therebetween, the pin is fixed at the first extended position.

  The air chamber 133 is disposed substantially at the center in the vehicle width direction and is fixed on the rear surface of the rear plate of the case body 135. The drive shaft 140 of the air chamber 133 moves in the front-rear direction in a state where the rear plate of the case body 135 is inserted, and an elongated pin connection hole 141 is formed at the front end portion thereof. The connection pin 142 is inserted into the pin connection hole 141.

  The link mechanism 134 includes a plate-like rotating member 143 that is rotatably supported by the case body 135, and left and right links 144 that extend in the vehicle width direction. The rotating member 143 integrally includes two link connecting end portions 143a facing each other across the rotation center, and an air chamber connecting end portion 143b positioned at an approximately equal distance from the two link connecting end portions. Shape. One end portion (end portion on the outer side in the vehicle width direction) of the link 144 is rotatably connected to the pin shaft portion 139, and the other end portion (end portion on the inner side in the vehicle width direction) is connected to the link connecting end portion 143a of the rotating member 143. Is rotatably connected to. The air chamber connecting end 143b of the rotating member 143 is connected to the drive shaft 140 of the air chamber 133 via a connecting pin 142 (pin connecting hole 141).

  In a state where the lock pin 137 protrudes to the lock position, air is discharged from the air chamber 133, and the drive shaft 140 is shortened most (see FIG. 13). When the lock pin 137 is unlocked, air (compressed air) is supplied to the air chamber 133. As a result, the drive shaft 140 extends forward, the connecting pin 142 is pushed forward by the rear end edge of the pin connecting hole 141, and the rotating member 143 rotates clockwise (in the direction of the arrow) in FIG. The link 144 moves inward in the vehicle width direction, and the lock pin 137 moves inward in the vehicle width direction against the urging force of the coil spring 138. When the connecting pin 142 reaches the position indicated by the two-dot chain line in FIG. 13, the lock pin 137 reaches the unlocking position, and the sliding movement of the main beam 4 with respect to the bogie beam 7 is allowed. For example, when the main beam 4 in the shortened position is moved to the first extended position, air is supplied to the air chamber 133, the lock pin 137 is moved to the unlock position, the tractor is advanced, and the main beam 4 is moved forward. After drawing out, air is discharged from the air chamber 133. When the air is discharged, the drive shaft 140 is shortened, the connecting pin 142 is positioned in the vicinity of the rear end edge of the pin connecting hole 141, and the lock pin 137 attempts to return to the locked position by the biasing force of the coil spring 138. Since the pin 137 is disengaged from the pin insertion hole 131, the return of the lock pin 95 to the locked position is prevented by the web 4c of the main beam 4. The main beam 4 is further pulled forward by advancing the tractor, and when the main beam 4 reaches the first extended position, the connecting pin 142 moves backward in the pin connecting hole 141 and is locked by the biasing force of the coil spring 138. The pin 137 enters the front pin insertion hole 131.

  In this embodiment, as shown in FIG. 7A, the bogie beam 7 is disposed between the switch 145 that is turned on by the operator when the main beam 4 is moved and the adjacent pin insertion hole 131. Two control sensors (detection means) 146 and 147 before and after detection, and a control device (control means) 148 that controls supply and discharge of air to and from the air chamber 133 in accordance with input signals from the switch 145 and the sensors 146 and 147. And are provided. When the relative positions of the beams 4 and 7 are shortened positions, the front and rear sensors 146 and 147 both detect the bogie beam 7. When the relative positions of the beams 4 and 7 are the first extended position, the front sensor 146 does not detect the bogie beam 7, but the rear sensor 147 detects the bogie beam 7. When the relative positions of the beams 4 and 7 are the first extended position, the front and rear sensors 146 and 147 do not detect the bogie beam 7. When the switch 146 is turned on, the control device 148 instructs the control valve or the like to supply air to the air chamber 133. When the operator moves forward or backward on the tractor, the main beam 4 moves with respect to the bogie beam 7, and the detection state of one of the sensors 146 and 147 changes, the control device 148 moves the air chamber to the control valve or the like. The air discharge from 133 is instructed. Therefore, the operator can change the total length of both beams 4 and 7 simply by moving the tractor forward or backward after operating the switch 145.

  The switch 145 accepts an input that distinguishes between movement between the pin insertion holes 131 adjacent to the front and rear (one-stage movement) and movement between the shortest position and the longest position (two-stage movement). May be. The control device 148 controls the air in the same manner as described above when a one-step movement is input. On the other hand, when a two-stage movement is input, it is determined whether the position before the movement is the shortest position or the second extension position from the detection state of the sensors 146 and 147 at that time. When it is determined that the position is the shortest position, air discharge is not instructed according to a change in the detection state of the front sensor 146, and air discharge is instructed according to a change in the detection state of the rear sensor 147. On the other hand, when it is determined that the position is the second extension position, the air discharge is not instructed according to the change in the detection state of the rear sensor 147, and the air discharge is instructed according to the change in the detection state of the front sensor 146. To do. In addition, when a two-step movement is input, if it is determined that the position before the movement is the first extension position, it is an erroneous operation, so control is performed when a one-step movement is input. .

  Next, the telescopic beam 12, the telescopic beam coupling mechanism 150, and the telescopic beam driving device 170 will be described with reference to FIGS.

  The rear end portions of the left and right bogie beams 7 are substantially cylindrical, and the front end portions of the left and right telescopic beams 12 extending in the front-rear direction are inserted therein, and the telescopic beams 12 slide in a telescopic manner with respect to the bogie beam 7. It is installed as possible. The telescopic beam 12 is formed by joining two rectangular cylinders stacked one above the other. The rear end of the bogie beam 7 and the telescopic beam 12 have a front storage position (see FIG. 18A), a first protruding position behind the storage position (see FIG. 18B), A telescopic beam coupling mechanism 150 is provided for releasably fixing the telescopic beam 12 to the left and right bogie beams 7 at each of the second projecting positions behind the one projecting position (see FIG. 18C). It has been.

  The telescopic beam coupling mechanism 150 includes three pin insertion holes 151 (see FIG. 17) having different front and rear positions (see FIG. 17), a pair of left and right lock pin devices 152, an air chamber 153, and a link mechanism. 154. The front and rear lock pin insertion holes 151 are formed at predetermined positions on the inner side wall of the telescopic beam 12 in the vehicle width direction.

  The lock pin device 152 includes a housing 155, a lock pin 156, and a coil spring 157. The housing 155 has a cylindrical shape, and is fixed to a side wall of the bogie beam 7 on the inner side in the vehicle width direction with an end portion on the outer side in the vehicle width direction penetrating the bogie beam 7. The lock pin 156 has a lock position that protrudes from the outer end of the housing 155 in the vehicle width direction into the bogie beam 7 and a lock release position that moves inward in the vehicle width direction from the lock position and does not protrude into the bogie beam 7. Is supported by the housing 155 so as to be slidable along the vehicle width direction. The coil spring 157 biases the lock pin 156 to the lock position. A tip end of a pin shaft portion 158 extending inward in the vehicle width direction from the lock pin 156 protrudes from the housing 155.

  The telescopic beam 12 is fixed at the storage position by inserting the lock pin 156 through the rearmost pin insertion hole 151 among the three pin insertion holes 151, and the lock pin 156 is inserted through the frontmost pin insertion hole 151. By this, it fixes to a 2nd protrusion position, and it fixes to a 1st protrusion position by inserting the lock pin 156 in the pin insertion hole 151 between them.

  The air chamber 153 is disposed substantially at the center in the vehicle width direction, and is fixed to the lower surface of the peripheral device support plate 171 fixed to the cross frame 8 via a bracket (not shown). The drive shaft 159 of the air chamber 153 moves in the front-rear direction, and a long hole-like pin connection hole 160 is formed at the tip thereof. The connection pin 161 is inserted into the pin connection hole 160.

  The link mechanism 154 includes a plate-like rotating member 162 that is rotatably supported by the peripheral device support plate 171 and left and right links 163 that extend in the vehicle width direction. The rotating member 162 integrally includes two link connecting end portions 162a facing each other across the rotation center, and an air chamber connecting end portion 162b positioned substantially equidistant from the two link connecting end portions. Shape. One end portion (end portion on the outer side in the vehicle width direction) of the link 163 is rotatably connected to the pin shaft portion 158, and the other end portion (end portion on the inner side in the vehicle width direction) is a link connection end portion 162a of the rotating member 162. Is rotatably connected to. The air chamber connecting end 162b of the rotating member 162 is connected to the drive shaft 159 of the air chamber 153 via a connecting pin 161 (pin connecting hole 160). As described above, the telescopic beam connecting mechanism 150 has the same configuration as the main connecting mechanism 130 and operates in the same manner as the main connecting mechanism 130 by supplying and exhausting air. Omitted.

  The telescopic beam driving device 170 is constituted by an air cylinder 172 fixed to the upper surface of the peripheral device support plate 171. The cylinder rod 173 of the air cylinder 172 can extend rearward, and the tip of the cylinder lot 173 is connected to the front surface of the lower rear bolster 70 in the substantially center in the vehicle width direction. By supplying and exhausting air to the cylinder rod 173, The telescopic beam 12 extends or shortens. The air cylinder 172 has a built-in limit switch, and a control device (not shown) receives a signal from a switch (not shown) to which an extension or shortening instruction is input from an operator and a signal from the limit switch. To do. The limit switch moves between the switch in which the state of the detection signal changes when the telescopic beam 12 moves between the storage position and the first protruding position, and the first protruding position and the second protruding position. The control device controls the supply and discharge of air to and from the air chamber 153 according to these input signals in the same manner as the control device 148 of the main coupling mechanism 130. To do. That is, the control device instructs the control valve or the like to supply air to the air chamber 153 when the switch is operated, and then supplies air to the air cylinder 172 based on the extension instruction or shortening instruction input to the switch. Is controlled to move the telescopic beam 12 with respect to the bogie beam 7. When the detection state of one of the limit switches changes, the control device instructs the control valve or the like to discharge air from the air chamber 153. Therefore, the operator can change the position of the lower rear bolster 70 only by operating the switch. The telescopic beam coupling mechanism 150 may also be controlled separately from the one-stage movement and the two-stage movement, similarly to the main coupling mechanism 130. Instead of the air cylinder 172, a hydraulic cylinder or the like may be used. You may provide the drive device.

  Next, the inrush prevention device 80 will be described with reference to FIG.

  The intrusion prevention device 80 is a frame-like member that prevents a passenger car or the like that has collided from behind, and integrally includes a pair of left and right support arms 81 extending forward. A pair of left and right support frames 82 extending downward are coupled to the left and right lower surfaces of the lower rear bolster 70, and through holes (not shown) penetrating in the front-rear direction are formed at the lower ends of the support frames 82. A frame part 83 is provided integrally. When the left and right support arms 81 are inserted through the through holes of the support frame 82, the intrusion prevention device 80 is supported to be slidable in the front-rear direction with respect to the bogie beam 7.

  Between the support arm 81 and the frame part 83 of the support frame 82, a storage position corresponding to the 40ft container 25 and the rear 20ft container 20R, and a protruding position behind the storage position and corresponding to the 45ft container 30 are provided. Are provided with a rush preventing device fixing mechanism 84 for releasably fixing the rush preventing device 80 to the left and right bogie beams 7 (support frame 82). The 45ft container 30 is loaded in a state of projecting rearward from the rear end (lower rear bolster 70) of the bogie beam 7 relative to the 40ft container 25 and the rear 20ft container 20R. In such a case, the rush prevention device 80 is fixed at the storage position, and when the 45 ft container 30 is loaded, the rush prevention device 80 is fixed at the protruding position behind the storage position.

  The intrusion prevention device fixing mechanism 84 includes a frame-side pin insertion hole 85 provided in the frame body portion 83 of the support frame 82, and arm-side pin insertion holes 86 at two front and rear positions formed in the support arm 81 (only the front is shown). And a lock pin 87 inserted through the pin insertion holes on the frame side and the arm side. The intrusion prevention device 80 is fixed at the storage position by inserting the lock pin 87 through the rear pin insertion hole of the front and rear arm side pin insertion holes, and the lock pin 87 is inserted through the front pin insertion hole 86. Is fixed in the protruding position.

  Next, each fastening device 41, 51, 61, 71 will be described.

  As shown in FIG. 7, the large front side fastening device 41 includes a thread pin 42, a lever 43, and a lever lock plate (not shown), and is disposed in the hollow interior of the end portion of the front bolster 40. The thread pin 42 is movable in the front-rear direction between the engagement position and the engagement release position, and is disposed immediately in front of the corner fittings 26, 31 of the containers 25, 30 placed on the chassis frame 2. Is done. The thread pin 42 in the engagement position protrudes rearward from the rear surface of the front bolster 40 in a state where the 40 ft container 25 or the 45 ft container 30 is placed on the chassis frame 2, and enters the engagement holes of the front corner fittings 26 and 31. Enter and engage to regulate the movement of the containers 25, 30. The thread pin 42 in the disengagement position moves forward from the engagement position, disengages from the engagement hole, and allows the containers 25 and 30 to move.

  One end of the lever 43 is connected to the rear end portion of the thread pin 42 and extends inward in the vehicle width direction. When the lever 43 is pushed rearward, the thread pin 42 moves to the rear engagement position, and when the lever 43 is pulled forward, the thread pin 42 moves to the front engagement release position. A guide plate (not shown) standing in the front-rear direction is fixed to the front bolster 40, and a guide hole (not shown) into which the other end of the lever 43 is inserted is formed in the guide plate. The guide hole has an intermediate straight portion extending in the front-rear direction, and a front end portion and a rear end portion extending downward from both front and rear ends of the intermediate straight portion. The lever 43 is allowed to move in the front-rear direction when the other end is located at the intermediate straight portion of the guide hole, and is restricted from moving in the front-rear direction when located at the front end portion and the rear end portion of the guide hole. . The lever lock plate is rotatably supported by the front bolster 40, and is engaged with the other end side of the lever 43 in both the state where the thread pin 42 is set to the engagement position and the state where the thread pin 42 is set to the engagement release position. By joining, the thread pin 42 is held in the engaged position or the disengaged position.

  As shown in FIG. 20, the small rear tightening device 51 is a lift-type twist lock device, and includes a body 53, a twist lock 52, a lever 54, and a handle rotation restricting arm (not shown). The body 52 is fixed to the end of the upper rear bolster 50. The twist lock 52 has a rectangular cylindrical shape with a long front-rear direction, and stands up substantially vertically upward. A rotation shaft (not shown) is rotatably inserted into the inner diameter portion of the twist lock 52, and a head 52a of the twist lock 52 is fixed to the upper end of the rotation shaft. By rotating the handle 55 provided integrally with the lower end of the rotating shaft, the head 52a is moved approximately 90 ° from the disengagement position (position shown in FIG. 20) having a long front-rear direction and the disengagement position. It rotates integrally with the rotating shaft between the rotated engagement positions. The lever 54 is rotatable between a lift allowance position and a lift prohibition position. When the head 52a is set to the disengagement position and the lever 54 is set to the lift allowance position, the twist lock 52 is moved to the head 52a. Can be moved up and down between a use position where the head 53 protrudes upward from the body 53 and a storage position where the head 52 is buried in the body 53. The twist lock 52 that can be moved up and down is maintained in the storage position by its own weight. When the twist lock 52 in the storage position is lifted to the use position and the lever 54 is rotated to the lift prohibition position, the twist lock 52 is held in the use position. . In this state, when the handle 55 is rotated while being lifted, the head 52a is rotated to the engaged position. The rotational position of the head 52 is held by engaging the handle rotation restricting arm with the outer peripheral portion of the handle 55.

  When the twist lock 52 is set to the use position, the head 52a of the twist lock 52 is set to the disengagement position, and the 20ft container 20 is placed at a predetermined position of the chassis frame 2, the head 52a of the twist lock 52 is By entering the engagement hole of the corner fitting 22 from below and operating it while lifting the handle 55 and rotating approximately 90 °, it reaches the engagement position and engages with the engagement hole. When loading the 40 ft container 25 or the 45 ft container 30, the head 52 a protruding from the upper surface of the body 52 interferes with the lower surfaces of the containers 25 and 30, so that the twist lock 52 is set at the storage position. Since the small rear tightening device 51 and the small front tightening device 61 are configured in the same manner, detailed description of the small front tightening device 61 is omitted.

  As shown in FIGS. 21 to 23, the large rear tightening device 71 is a rotationally raised twist lock device, and includes a body 73, a twist lock 72, a lock hook 74, a lock shaft 75, and an assist grip 76. And an anti-rotation lock 77. The body 73 has a rectangular box shape, and the lower end portion of the body 73 is supported by the lower rear bolster 70 so as to be rotatable about a rotation shaft 78 along the vehicle longitudinal direction. The large rear fastening device 71 has a use position standing up with respect to the lower rear bolster 70 around the rotation shaft 78 (shown by a solid line in FIG. 22) and a 90 ° rotation inward in the vehicle width direction from the use position. It is possible to rotate between the storage position (indicated by a two-dot chain line in FIG. 22). The large rear tightening device 71 in the retracted position is supported by the lower rear bolster 70 while being stored in the lower rear bolster 70. The large rear tightening device 71 in the use position is restricted in rotational movement by engaging the distal end portion of the lock hook 74 rotatably supported by the lower rear bolster 70 with the lock shaft 75 fixed to the body 73. The In the retracted position, the entire large rear tightening device 71 is retracted below the lower surface of the upper rear bolster 50 so as not to interfere with the upper rear bolster 50 when the main beam 4 is set to the shortened position.

  Since the upper surface of the bogie beam 7 is lower than the upper surface of the main beam 4 and the upper surface of the lower rear bolster 70 is also lower than the upper surface of the upper rear bolster 50, the rear side of the main frame 3 in the 40 ft container 25 and the 45 ft container 30 is It is spaced upward from the upper surface of the bogie beam 7. For this reason, the height of the upper surface of the large rear tightening device 71 (body 73) at the use position is set to a height that contacts the 40ft container 25 and the 45ft container 30 and supports from below. Thus, the large rear fastening device 71 in the use position is disposed immediately below the corner fitting 27 of the 40 ft container 25 or the corner fitting 33 of the 45 ft container 30 placed on the chassis frame 2. The rear part of 30 is supported from below.

  The twist lock 72 has a rectangular cylindrical shape with a long front-rear direction, is fixed to the body 73, and protrudes from the upper surface of the body 73 (the upper surface at the use position). In the use state in which the large rear tightening device 71 is set to the use position, the twist lock 72 stands substantially vertically upward. The rotary shaft 72b is inserted into the inner diameter portion of the twist lock 72 while being rotatably supported, and the head 72a of the twist lock 72 is fixed to the upper end of the rotary shaft 72b. By rotating a handle 79 provided integrally with the lower end of the rotating shaft 72b, the head 72a is moved from the disengagement position (shown in FIGS. 21 and 22) having a long front-rear direction and the disengagement position. It rotates integrally with the rotating shaft 72b between the engagement positions rotated approximately 90 °.

  Holding the assist grip 76, the large rear fastening device 71 in the retracted position is rotated to the use position, the head 72a of the twist lock 72 is set to the disengagement position, and the 40ft container 25 or the 45ft container 30 is moved to the chassis. When placed at a predetermined position on the frame 2, the head 72 a of the twist lock 72 enters the engagement holes of the corner brackets 27 and 33 from below and operates the handle 79 to rotate approximately 90 ° to engage. The position is reached and engages with the engagement hole. The anti-rotation lock 77 is supported so as to be able to move up and down with respect to the standing body 73. When the anti-rotation lock 77 temporarily held at the upper position is lowered, the anti-rotation lock 77 is engaged with the outer peripheral portion of the handle 79. In combination, the rotation of the head 72 is prevented. When the main beam 4 is set at the shortened position, the large rear fastening device 71 is set at the retracted position.

  Each of the tightening devices 51, 61, 71 described above is not limited to the above structure as long as it has a required function.

  Next, a holding structure for the linear member 200 such as a tube for air piping or an electric cable will be described with reference to FIGS.

  Between the left and right bogie beams 7, the peripheral device support plate (support member) 171 described above is fixed in a state of being placed on the cross frame 8. The peripheral device support plate 171 is a plate body bent in a substantially U shape, and has a substantially horizontal flat support surface 210 and a pair of left and right side surfaces 211 that stand upward from the left and right side edges of the support surface 210 and face each other. , 212. An insertion hole 213 penetrating vertically is formed at a predetermined position of the support surface 210. On the support surface 210 of the peripheral device support plate 171, a resin-made chain-shaped wiring duct (chain-shaped holding member) 201 is placed.

  The chain-shaped wiring duct 201 has an intermediate deformation portion 201c that extends forward from one end portion 201a, is folded back in an arc shape in the vehicle width direction, and extends to the other end portion 201b at the rear. The chain-shaped wiring duct 201 is configured such that the arcuate folding position 202 in the intermediate deformation portion 201c moves between the one end portion 201a and the other end portion 201b, so that the one end portion 201a and the other end portion 201b are relatively Allow movement. The chain-shaped wiring duct 201 has a structure in which bending is allowed only in one direction from a straight state (not bending in other directions), and the bent portion does not bend at a curvature radius smaller than a predetermined minimum curvature radius. Have. By utilizing such structural characteristics, the outer side in the vehicle width direction of the portion of the intermediate deformation portion 201c that extends rearward from the turn-back position 202 toward the one end portion 201a (the straight portion on the right side in the present embodiment) A portion (this embodiment) that is supported by being in contact with and supported by one of the pair of side surfaces 211 and 212 of the peripheral device support plate 171 (right side surface 212 in the present embodiment) from the turn-back position 202 toward the other end 201b. Then, the outer side in the vehicle width direction of the left straight portion is supported in contact with the other of the pair of side surfaces 211 and 212 (the left side surface 211 in this embodiment) of the peripheral device support plate 171. Both the heights of the chain-like wiring ducts 201 placed on the peripheral device support plate 171 are set so as not to interfere with the main frame 4 moving upward.

  One end portion 201a of the chain-shaped wiring duct 201 is not fixed to the peripheral device support plate 171 (bogie frame 6) and is disposed between the rear end portions of the left and right main beams 4. The other end 201 b of the chain wiring duct 201 is fixed to the peripheral device support plate 171 in front of the insertion hole 213.

  The linear member 200 in which tubes for air piping, electric cables and the like are bundled has flexibility, and moves backward from the front end of the main frame 3 along the main beam 4 on one side (right side in the present embodiment). It is routed and held at the rear end portion of the main beam 4 (the portion 200a whose position in the front-rear direction substantially coincides with the one end portion 201a of the chain-shaped wiring duct 201), and spans the one end portion 201a of the chain-shaped wiring duct 201. . And it is routed and bound to the chain-like wiring duct 201 from the one end portion 201a toward the other end portion 201b, and is routed to each supply place through the insertion hole 213 from the other end portion 201b. In addition, the expansion / contraction mechanism 205 (refer FIG. 2) is used for the wiring of the linear member (mainly electric wire cable) between the bogie frame 6 and the lower rear bolster 70. The expansion / contraction mechanism 205 is configured by two arms each having one end rotatably supported by the bogie frame 5 and the lower rear bolster 70, and the other ends rotatably connected. It is bound and held by two arms.

  Further, as the chain-shaped wiring duct 201, for example, a plastic chain duct manufactured by Koganei Co., Ltd. can be used. However, the chain-shaped holding member is not limited to this, and may have the same function. Good. Further, the chain-shaped wiring duct 201 may be folded up and down.

  According to this embodiment, when the 20ft container 20 is loaded, the front corner fitting 21 of the container 20 is fastened by the small front fastening device 61, and the rear corner fitting 22 is fastened by the small rear fastening device 51. To do. At the time of 20ft rear end alignment, the total length of both beams 4 and 7 is made the shortest, the telescopic beam 12 is set to the storage position, and the inrush prevention device 80 is set to the storage position. Thereby, the rear end of the semi-trailer 1 can be brought close to or in contact with the platform 19 to load / unload the load.

  During 20 ft travel, the main beam 4 is pulled forward from the 20ft rear end alignment to set the total length of both beams 4 and 7 to the first predetermined length. When the 40 ft container 25 is loaded, the total length of both beams 4 and 7 is set to the first predetermined length, the telescopic beam 12 is set to the second protruding position, and the rush preventing device 80 is set to the receiving position. When the 45 ft container 30 is loaded, the total length of both beams 4 and 7 is set to the second predetermined length (longest), the telescopic beam 12 is set to the first protruding position, and the intrusion prevention device 80 is set to the protruding position.

  Accordingly, it is possible to change the wheel base according to the total length of the containers 20, 25, and 30 to be loaded and to travel, and to distribute the load to each axle in a well-balanced manner. Concentration can be suppressed.

  When the main frame 3 moves forward with respect to the bogie frame 6, the linear member 200 on the main frame 3 side also moves forward, and the portion of the linear member 200 held at the rear end of the main frame 3. One end 201a of the chain-like wiring duct 201 is pulled forward by the forward movement of 200a. Since the intermediate deformation portion 201c of the chain-shaped wiring duct 201 allows relative movement in the front-rear direction between the one end portion 201a and the other end portion 201b, the one end portion 201a is maintained while the position of the other end portion 201b with respect to the bogie frame 6 is maintained. Moves forward. Conversely, when the main frame 3 moves rearward with respect to the bogie frame 6, the linear member 200 on the main frame 3 side also moves rearward and is held at the rear end of the main frame 3 in the linear member 200. One end 201a of the chain-like wiring duct 201 is pulled backward by the movement of the portion 200a rearward. Since the intermediate deformation portion 201c of the chain-shaped wiring duct 201 allows relative movement in the front-rear direction between the one end portion 201a and the other end portion 201b, the one end portion 201a is maintained while the position of the other end portion 201b with respect to the bogie frame 6 is maintained. Moves backward. Therefore, in the semi-trailer 1 in which the main frame 3 and the bogie frame 6 are slidably connected, the linear member 200 is placed in the main frame 3 and the bogie frame 6 so as to allow relative movement between the main frame 3 and the bogie frame 6. Can be held in.

  Moreover, since the intermediate deformation part 201c of the chain-like wiring duct 201 is folded back in the vehicle width direction, an increase in the arrangement space in the height direction of the chain-like wiring duct 201 can be suppressed, and the main frame 3 and the bogie frame 6 Even when the gap in the height direction is narrow, interference between the main frame 3 and the chain-shaped wiring duct 201 can be prevented.

  Furthermore, the chain-shaped wiring duct 201 is placed on the support surface 210 of the peripheral device support plate 171, and the intermediate deformation portion 201c is supported by the left and right side surfaces 211 and 212 on the left and right sides of the turn-back position 202, respectively. It is possible to stabilize the deformation behavior of the intermediate deformation portion 201c by the relative movement between the portion 201a and the other end portion 201b.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary. For example, the dual type semi-trailer 1 capable of selectively stacking the 20 ft container 20, the 40 ft container 25 and the 45 ft container 30 has been described, but the length in the front-rear direction is not limited thereto.

  The main connection mechanism 63, the intrusion prevention device fixing mechanism 84, and the main connection mechanism 130 are not limited to the above shapes and structures as long as they have the required functions.

1: Semi-trailer 2: Chassis frame 3: Main frame 4: Main beam 4a: Upper flange 4b: Lower flange 4c: Web 5: Cross frame 6: Bogie frame 7: Bogie beam 7a: Upper plate 7b: Lower plate 7c: Inner plate 7d: Outer plate 7e: Upper flange 7f: Web 8: Cross frame 10: Suspension device 11: Wheel (tire)
12: telescopic beam 15: kingpin 16: step (gooseneck)
20: 20ft container (small container)
25: 40ft container (first large container)
30: 45ft container (second large container)
40: Front bolster 41: Front side tightening device for large containers (Large front side tightening device)
42: Thread pin 50: Upper rear bolster 51: Rear tightening device for small containers (small rear tightening device)
52: Twist lock 60: Intermediate bolster 61: Front side fastening device for small containers (Small side fastening device)
70: Lower rear bolster 71: Rear tightening device for large containers (large rear tightening device)
80: Inrush prevention device 110: Rear guide roller 110
112: Rotating shaft 120: Front guide roller 120
122: Rotating shaft 127: Upper movement restriction surface 129: Lateral movement restriction surface 130: Main coupling mechanism (coupling mechanism)
131: Pin insertion hole 132: Lock pin device 133: Air chamber (driving means)
134: Link mechanism 135: Case body 137: Lock pin 138: Coil spring (biasing means)
150: telescopic beam coupling mechanism 151 pin insertion hole 151
153: Air chamber 156: Lock pin 157: Coil spring 170: Telescopic beam driving device 171: Peripheral device support plate (support member)
172: Air cylinder 200: Linear member 200a: A portion of the linear member held at the rear end of the main frame 201: Chain-shaped wiring duct (chain-shaped holding member)
201a: one end 201a
201b: the other end 201b
201c: Intermediate deformation portion 202: Folding position 210: Support surface 211, 212: Side surface 213: Insertion hole

Claims (2)

It has a pair of left and right main beams extending along the front-rear direction, and is connected to the tractor and pulled to the front main frame, and extends along the front-rear direction so that the left and right main beams can slide in the front-rear direction. Each of a plurality of predetermined positions each having a pair of left and right bogie beams to be supported and having different relative positions in the front-rear direction of the rear bogie frame supported from below by wheels and the main frame and the bogie frame A connecting mechanism for releasably connecting the left and right main beams and the left and right bogie beams, and a linear member holding structure in a semi-trailer,
An intermediate deformation portion extending forward from one end portion and folded back to the other end portion at the rear, and the folding position of the intermediate deformation portion moves between the one end portion and the other end portion, thereby the one end. A chain-shaped holding member that allows relative movement in the front-rear direction between the portion and the other end is disposed between the left and right bogie beams,
The one end of the chain-shaped holding member is disposed between rear ends of the left and right main beams,
Fixing the other end of the chain-shaped holding member to the bogie frame;
The linear member is routed from the front end portion of the main frame to the rear end portion, and held at the rear end portion of the main frame, and the one end portion of the chain-shaped holding member is extended along the intermediate deformation portion. A holding structure for a linear member in a semi-trailer, characterized in that the linear member is routed to the other end and held by the chain-like holding member. The holding structure for a linear member according to claim 1,
A support member having a substantially horizontal planar support surface and a pair of left and right side surfaces that stand upward from the left and right side edges of the support surface and is opposed to each other is disposed between the left and right bogie beams. Fixed against the frame,
Of the intermediate deformation portion of the chain-shaped holding member, the vehicle width direction outer side of the portion extending rearward from the folded position toward the one end is supported by one of the pair of side surfaces of the support member, and from the folded position. The chain-shaped holding member is placed on the support surface of the support member with the vehicle width direction outer side of the portion extending rearward toward the other end portion supported by the other of the pair of side surfaces of the support member. A holding structure for a linear member in a semi-trailer characterized by the above.

Images