JP2020016015A - Extension belt conveyor - Google Patents

Abstract

To provide an extension belt conveyor having a length on which adjustment work can be easily performed.SOLUTION: An extension belt conveyor 1 comprises: a head pulley and a tail pulley; an endless conveyor belt 4 bridged across the head pulley and the tail pulley; rollers 11, 12, 21 for holding the conveyor belt 4 between the head pulley and the tail pulley; an upper frame 40 including a plurality of longer direction members 44 extending in the longer direction of the conveyor belt 4 and a width direction member 41 connecting the longer direction members 44 in the width direction of the conveyor belt 4 to support the rollers 11, 12, 21; a lower frame 30 for supporting the upper frame 40 on the ground; connection means 50 for connecting the upper frame 40 with the lower frame 30; and first position adjustment means A1 for making a relative position between the lower frame 30 and the width direction member 41 with respect to the width direction of the conveyor belt 4 variable.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a belt conveyor, and more particularly to a stretch type belt conveyor whose installation extension can be changed at any time in order to transport earth and sand in tunnel construction or the like.

  In the excavation work of a tunnel, a large dump truck is generally used to carry out soil and the like generated by excavation. Further, in order to suppress the traveling of the dump truck in the tunnel as much as possible, a belt conveyor may be used in some or all sections of the tunnel. In particular, in the excavation work of a long tunnel, the use of a so-called stretched belt conveyor, which can extend the length in accordance with the progress of excavation, is increasing.

  As a technique of a stretched belt conveyor, for example, there is a technique described in Patent Document 1. The stretching belt conveyor described in Patent Literature 1 arranges a storage unit including a multi-stage roller between a head unit including a head pulley on a driving side and a tail unit including a tail pulley on a driven side, An endless conveyor belt is stretched between them. The tail portion is arranged on the face side, which is the cutting edge of the excavation, and is mounted on a movable tail moving cart. The head portion is disposed on the side near the wellhead to which the earth and sand are carried out, or on the outside of the wellhead.

  As the excavation progresses, the tail is moved toward the face, and the conveyor belt is extended from the storage to extend the distance between the storage and the tail. At this time, in the storage section, the distance between the plurality of rollers constituting the multi-stage roller is reduced, so as to cope with the feeding of the conveyor belt.

  Between the storage part and the tail part, a frame assembled by joining metal pipes for a temporary scaffold is sequentially extended toward the face to form an extended part. A carrier bed provided with a carrier roller for holding a conveyor belt on the transport surface side and a return bed provided with a return roller for holding a conveyor belt on the return side are attached to the frame of the extension section.

  In the extension part of Patent Literature 1, as a metal pipe for a temporary scaffold constituting a frame, a building frame in which the upper parts of two pillars standing in the vertical direction are connected by a lateral beam is used. The building frames are arranged side by side in the longitudinal direction of the conveyor belt, adjacent building frames are connected by diagonal bracing, and adjacent building frames are connected by a horizontal single pipe. The carrier bed and the return bed are fixed to a laterally extending single tube.

JP 2017-075496 A

  In the above-described stretch belt conveyor technique, when assembling the stretched section, the frame assembling work is complicated.

  For example, the horizontal beams connecting the upper parts of the two pillars standing in the vertical direction are respectively connected by general-purpose clamp members. It is necessary to adjust the position of the clamp member with respect to the pillar portion and the position of the clamp member with respect to the beam portion to predetermined positions by sliding the members. Similarly, the position of the clamp member with respect to the building frame and the position of the clamp member with respect to the single tube are also adjusted to a predetermined position by sliding the members with respect to the single tube connecting the adjacent building frames in the horizontal direction. There is a need. Since a general-purpose clamp member used for a single tube needs to be tightened while supporting the member by hand, it is time-consuming and time-consuming to tighten a large number of locations.

  In particular, in the stretch belt conveyor, the width of the building frame, that is, the space between two pillars or the space between building frames adjacent to each other in the longitudinal direction of the conveyor belt depends on the specifications of the stretch belt conveyor and the condition of the work site. Therefore, such an adjustment work is necessary because it differs each time.

  Therefore, an object of the present invention is to make it possible to easily adjust the installation length of a stretched belt conveyor.

  In order to solve the above problems, the present invention provides a head pulley and a tail pulley, an endless conveyor belt stretched between the head pulley and the tail pulley, and a head pulley and a tail pulley. An upper portion for supporting the roller, comprising: a roller for holding the conveyor belt; a plurality of longitudinal members extending in the longitudinal direction of the conveyor belt; and a width member for connecting the longitudinal members to each other in the width direction of the conveyor belt. A frame, a lower frame for supporting the upper frame on the ground, connecting means for connecting the upper frame and the lower frame, and a relative position of the lower frame and the width direction member with respect to the width direction being variable. And a stretching belt conveyor having first position adjusting means.

  Here, it is possible to adopt a configuration further including second position adjusting means for changing a relative position of the width direction member and the longitudinal direction member with respect to the width direction.

  In each of these aspects, the lower frame is a temporary scaffolding member including a plurality of pillar portions that stand vertically on the ground and a beam portion connecting the pillar portions to each other in the width direction. The connection means may be configured to be connected to the upper end of the pillar.

  In each of these aspects, the first position adjusting means may include a longitudinal or a plurality of holes of the width direction member, a shaft member provided in the connecting means and inserted through the hole, and the shaft member. And a fastening member for fixing the shaft member to the width direction member.

  Further, the second position adjusting means includes a longitudinal or a plurality of first insertion holes of the width direction member, a connection member attached to the longitudinal direction member, a second insertion hole of the connection member, An insertion shaft member inserted through the first insertion hole and the second insertion hole, and a fastening member attached to the insertion shaft member and fixing the insertion shaft member to the width direction member can be provided.

  Alternatively, the second position adjusting means pulls the connecting member attached to the longitudinal member, the locking portion provided on the connecting member to the width member, and the locking portion toward the longitudinal member. And a fastening member.

  In each of these aspects, a configuration may be employed in which the connection unit includes an angle adjustment unit that changes an angle of the longitudinal member with respect to the horizontal direction.

  At this time, the connection unit includes a first connection unit connected to the lower frame, and a second connection unit connected to the width direction member, and the angle adjustment unit is provided in the second connection unit. Configuration can be adopted.

  The present invention connects an upper frame having a plurality of longitudinal members supporting rollers for holding a conveyor belt and a width member connecting the longitudinal members, to a lower frame on the ground, and connecting the upper frame and the lower frame. The first position adjusting means for changing the relative position of the lower frame and the width direction member with respect to the width direction of the conveyor belt is provided, so that the installation length of the stretching belt conveyor is adjusted. Can be simplified.

Front view showing an embodiment of the present invention The side view which shows the same embodiment and shows the case where an extending | stretching belt conveyor is horizontal along a conveyance direction. Perspective view of the same embodiment Main part enlarged view of FIG. Exploded perspective view of a connecting means between the width member of the upper frame and the lower frame. Side view showing another embodiment, showing a case where the stretched belt conveyor is inclined along the transport direction. (A) is a main part enlarged view showing a state where the stretched belt conveyor is horizontal along the transport direction, and (b) is a state where the stretched belt conveyor is inclined along the transport direction. 9A and 9B show still another embodiment, wherein FIG. 9A is an enlarged perspective view of a main part showing a connection state between a width direction member and a longitudinal direction member in an upper frame, and FIG. The principal part expansion perspective view which shows the state which connected the width direction member and the longitudinal direction member in the upper frame with the connection member which shows another embodiment. 9A and 9B show a connecting member used in the embodiment of FIG. 9, wherein FIG. 9A is a side view, FIG. 9B is a plan view, and FIG.

  Hereinafter, a stretch belt conveyor 1 according to an embodiment of the present invention will be described with reference to the drawings.

  The stretched belt conveyor 1 of this embodiment is assumed to be used to carry out, for example, earth and sand generated by shaving the ground with a face to the outside of a wellhead at the forefront of excavation in tunnel excavation work. I have.

  As shown in FIGS. 1 and 2, the configuration of the stretching belt conveyor 1 includes a head pulley 2 located on a wellhead side, a tail pulley 3 located on a face side, and a carrier bed 10. An endless conveyor belt 4 is stretched between the head pulley 2 and the tail pulley 3. A belt-shaped rubber material having a predetermined width is used for the conveyor belt 4, and a reinforcing member made of fiber, metal, or the like is embedded in the inside thereof. A predetermined strength that can withstand the load of the object is secured.

  A driving force is input to the head pulley 2 from a driving source M such as a driving motor. When the head pulley 2 is rotated by the driving force, the conveyor belt 4 on the transport side 4a located on the upper surface is located on the lower surface. The belt is sent to the return side 4b, and the endless conveyor belt 4 runs. At this time, the tail pulley 3 rotates following the traveling of the conveyor belt 4 and smoothly sends the conveyor belt 4 from the return side 4b to the transport side 4a.

  Further, between the head pulley 2 and the tail pulley 3, various rollers 11, 12, 21 for holding the conveyor belt 4 are arranged. A plurality of carrier beds 10 having carrier rollers 11 and 12 for holding the conveyor belt 4 are arranged on the transport side 4 a along the longitudinal direction of the conveyor belt 4. On the return side 4b, a plurality of return beds 20 each including a return roller 21 for holding the conveyor belt 4 are arranged along the longitudinal direction of the conveyor belt 4. Reference numeral 5 in the drawing is a guide roller that stably holds the conveyor belt 4 on the return side 4b near the head pulley 2 and the tail pulley 3.

  The head pulley 2 is installed on an end frame F fixed on a foundation B immovably installed on the ground G so as to be rotatable around a rotation axis. The tail pulley 3 is installed on an end frame F on a tail moving trolley C movably arranged on the ground G so as to be rotatable around a rotation axis. A crusher for crushing debris and the like generated by excavation and a towing vehicle D equipped with a transfer device (small conveyor) for placing the crushed material on the conveyor belt 4 are arranged on the face side of the tail moving cart C. The tail moving trolley C is pulled by the moving tractor D and moves toward the face in accordance with the progress of the excavation.

  The carrier bed 10 and the return bed 20 are attached to a ladder-like upper frame 40 extending in the longitudinal direction of the conveyor belt 4. The upper frame 40 is supported on the ground G by a plurality of lower frames 30 arranged along the longitudinal direction of the conveyor belt 4. Further, the lower frame 30 and the upper frame 40 are connected by connecting means 50.

  The upper frame 40 has a plurality of longitudinal members 44 extending in the longitudinal direction of the conveyor belt 4 and a plurality of width members 41 connecting the longitudinal members 44 to each other in the width direction of the conveyor belt 4 along the longitudinal direction. I have. In this embodiment, the longitudinal members 44 are used in pairs.

  Further, the longitudinal members 44 have a predetermined length, and are used by being connected in a required number along the longitudinal direction of the conveyor belt 4 according to the installation length of the stretched belt conveyor 1. For this reason, holes are provided at both ends in the longitudinal direction of the longitudinal member 44 for inserting bolts at the time of connection with the longitudinal ends of the adjacent longitudinal members 44. The parts are connected by being tightened with bolts and nuts. The predetermined length set for the longitudinal member 44 may be a plurality of types, for example, one type of 5 m may be prepared, or a type of 2.5 m may be prepared in addition to the 5 m. You may prepare what kind of length.

  The carrier bed 10 and the return bed 20 are fixed to the longitudinal members 44 of the upper frame 40 as shown in FIGS.

  The carrier rollers 11 and 12 of the carrier bed 10 include a first carrier roller 11 that holds the center of the conveyor belt 4 in the width direction and a second carrier roller 12 that holds both ends of the conveyor belt 4 in the width direction. The first carrier roller 11 is arranged horizontally, and the second carrier roller 12 is arranged to be inclined upward toward the outside in the width direction. As a result, the conveyor belt 4 on the transport side 4a is held in a shape in which both ends in the width direction are raised above the center in the width direction, that is, a V-shape as viewed from the front.

  A mounting member 45 is provided at a position of the two longitudinal members 44 facing each other. The carrier bed 10 is attached to a support beam 15 fixed so as to bridge between mounting members 45 facing each other in the width direction, and an end fixture 16 of the support beam 15.

  Both ends of the rotation shaft 11 a of the first carrier roller 11 are supported by a pair of support pieces 13 provided on the support beam 15 so as to be rotatable around the axis. One of both ends of the rotating shaft 12a of the second carrier roller 12 is supported by a support piece 17 provided on a support beam 15 so as to be rotatable around the axis, and the other is so as to rise upward from the end fixing tool 16. The support piece 14 is provided so as to be rotatable around an axis. Reference numerals 13a, 14a, and 17a in the figure indicate groove-shaped support portions that support the rotating shafts 11a and 12a, respectively.

  In this embodiment, the mounting member 45 is composed of two support portions 45a that rise upward from the longitudinal member 44 and a connecting piece 45b that connects the upper ends of the support portions 45a. According to the holding shape and the holding position, the mounting member 45 may have another form.

  The mounting member 23 is provided at a position where the two longitudinal members 44 face each other. Both ends of the rotation shaft 21a of the return roller 21 of the return bed 20 are supported by a mounting member 23 facing the width direction so as to be rotatable around the axis. Reference numeral 23a in the figure indicates a groove-shaped support portion that supports the rotating shaft 21a.

  The lower frame 30 is a temporary scaffolding member including a plurality of pillars 31 standing vertically on the ground G and a beam 34 connecting the pillars 31 to each other in the width direction of the conveyor belt 4. In this embodiment, as shown in FIG. 3, a gate-shaped building frame is constituted by two pillars 31 and a beam 34 connecting the upper ends of the pillars 31. A plurality of building frames are arranged at predetermined intervals along the longitudinal direction of the conveyor belt 4.

  Further, in this embodiment, in order to further reinforce the building frame, a vertical reinforcing portion 35 connecting the intermediate portion of the column portion 31 and the intermediate portion of the beam portion 34, and a horizontal reinforcing portion connecting the vertical reinforcing portion 35 and the column portion 31. A reinforcing portion 36 is provided. Further, below the beam portion 34, a second horizontal reinforcing portion 37 that connects the vertical reinforcing portions 35 is provided.

  The members constituting the column 31, the beam 34, the vertical reinforcing portion 35, the horizontal reinforcing portion 36, the second horizontal reinforcing portion 37, and the like are formed of hollow metal members having a circular cross section. May have a shape other than a circle. For example, the cross section may be quadrangular. Further, a material other than metal may be used as long as it has a predetermined strength. Further, a solid shaft member that is not hollow may be used.

  A support plate 32 placed on the ground G is provided below the column 31, and a height adjusting unit 33 that can adjust the height of the support plate 32 projecting from the lower end of the column 31 is provided. The height adjusting means 33 of this embodiment is constituted by a screw mechanism, but other than that, a well-known mechanism capable of fixing the support plate 32 to the lower portion of the column 31 at a predetermined projecting height can be adopted. In addition, it is also possible to provide a cross-connecting diagonally between building frames adjacent to each other in the longitudinal direction of the conveyor belt 4 to further strengthen the structure for fixing the building frames.

  As shown in FIG. 5, the connection means 50 includes a first connection portion 51 connected to the lower frame 30 and a second connection portion 52 connected to the widthwise member 41 of the upper frame 40.

  The first connection part 51 is connected to the upper end of the pillar part 31. In the first connection portion 51, a lower tubular portion 51a located below and an upper tubular portion 51b located above are connected by a central tubular portion 51c slightly larger in diameter than the lower tubular portion 51a and the upper tubular portion 51b. Configuration. The lower tubular portion 51a and the upper tubular portion 51b are located on the same axis. The lower tubular portion 51a is inserted into the opening 31a at the upper end of the pillar portion 31, and further insertion is restricted by the center tubular portion 51c hitting the upper edge of the pillar portion 31, so that both are positioned.

  The second connection part 52 is connected to the upper end of the first connection part 51. The second connecting portion 52 has a configuration in which a lower connecting tubular portion 52a located below and an upper connecting portion 52b located above are connected. The lower connection cylinder part 52a is fitted on the outer periphery of the upper cylinder part 51b of the first connection part 51, and the central cylinder part 51c is brought into contact with the lower edge of the lower connection cylinder part 52a, so that both are positioned.

  Reference numeral 53 in the drawing denotes a retaining shaft. When one end of the retaining shaft 53 is inserted into the hole 51e of the first connecting portion 51 and the hole 52e of the second connecting portion 52, both are prevented from coming off. In addition, the other end of the retaining shaft 53 is inserted into the hole 51d of the first connecting portion 51, so that the retaining shaft 53 is prevented from rotating.

  Further, a shaft member 52d is connected to the upper connection portion 52b by a lateral bolt 52h and a nut 52i screwed into the bolt 52h. The shaft member 52d is sandwiched between two support plates constituting the upper connection portion 52b, and is swingable around the axis of the bolt 52h as a swing center along the longitudinal direction of the conveyor belt 4. The shaft member 52d can be fixed at an arbitrary swing angle by tightening the nut 52i.

  A male screw portion is provided on the shaft member 52d. Two nuts, a first nut 52f and a second nut 52g, are screwed into the male screw portion of the shaft member 52d. The first nut 52f and the second nut 52g function as fastening members 52f and 52g.

  Each part of the first connection part 51 and the lower connection cylinder part 52a of the second connection part 52 are formed of hollow metal members having a circular cross section like the lower frame 30, but the cross-sectional shapes of these members are circular. Other shapes may be used. For example, the cross section may be quadrangular. Further, a material other than metal may be used as long as it has a predetermined strength. Further, a solid shaft member that is not hollow may be used.

  The stretched belt conveyor 1 includes first position adjusting means A1 for changing a relative position between the lower frame 30 and the width direction member 41 of the upper frame 40 with respect to the width direction of the conveyor belt 4.

  Further, the stretched belt conveyor 1 is provided with a second position adjusting means for changing a relative position between the width direction member 41 of the upper frame 40 and the longitudinal direction member 44 of the upper frame 40 with respect to the width direction of the conveyor belt 4. A2 is provided.

  As shown in FIG. 5, the first position adjusting means A1 includes a longitudinal hole 41a of the width member 41 of the upper frame 40, and a shaft member 52d provided in the connecting means 50 and inserted through the hole 41a. And fastening members 52f and 52g attached to the shaft member 52d and fixing the shaft member 52 to the width direction member 41. The fastening members 52f and 52g of this embodiment are the first nut 52f and the second nut 52g described above.

  When the shaft member 52d is inserted into the hole 41a, the upper surface of the first nut 52f is brought into contact with the lower surface of the width direction member 41 (the lower surface near the edge of the hole 41a), and the second nut 52g is formed of a square tube. Into the internal space of the width member 41 to be formed. The second nut 52g is set in advance to a predetermined screwing amount with respect to the shaft member 52d, and the second nut 52g is slid in the internal space of the width direction member 41 so that the desired position in the width direction (the length of the hole 41a). At the desired position along the direction). Thereafter, when the first nut 52f is tightened to the second nut 52g side, the connection member 50 and the width direction member 41 are integrally fixed. At this time, when the means for preventing the first nut 52f from rotating is provided on the width direction member 41 side when the second nut 52g is tightened, the work is further facilitated.

  As described above, the first position adjusting means A1 allows the two members to be aligned by sliding the members, and the member can be fixed at that position by tightening the nut. The positioning operation in the width direction of the conveyor belt 4 between the conveyor belt 40 and the fixing belt 40 is easy, and the fixing operation is also easy.

  Further, instead of the longitudinal holes 41a provided in the width direction member 41, a plurality of holes 41a arranged in parallel along the width direction of the conveyor belt 4 may be employed. If the hole 41a is a long slot, continuous position adjustment can be performed in a stepless manner in the width direction. However, if the hole 41a is a plurality of holes 41a, the hole 41a into which the shaft member 52d is inserted is selected. Thus, stepwise position adjustment to a predetermined width direction position is possible.

  As shown in FIG. 5, the second position adjusting means A2 includes a plurality of first insertion holes 41d of the width direction member 41, a connecting member 42 attached to the longitudinal direction member 44, and a second member of the connecting member 42. An insertion hole 42a, an insertion shaft member 43a inserted through the first insertion hole 41d and the second insertion hole 42a, and a fastening member 43b attached to the insertion shaft member 43a and fixing the insertion shaft member 43a to the width direction member 41. It is composed of

  The connection member 42 is a member having a shape in which a pair of flat surfaces having plane directions parallel to each other are connected by an inclined surface. The upper flat surface is fixed to the upper surface of the longitudinal member 44 by welding or the like. In addition, this may be another fixing method such as bolt fixing. The above-mentioned second insertion hole 42a is provided in the flat surface located below. A first insertion hole 41d at a desired width direction position is selected, the insertion shaft member 43a is inserted through the selected first insertion hole 41d and the second insertion hole 42a via a washer 43c, and a fastening member formed of a nut is formed. By tightening 43b, connecting member 42 and width direction member 41 are fixed.

  As described above, by selecting the first insertion hole 41d through which the insertion shaft member 43a is inserted by the second position adjustment means A2, both can be aligned, and the fixing of the member at that position is also performed by the nut. Since the tightening is possible, the positioning operation of the conveyor belt 4 between the width direction member 41 and the longitudinal direction member 44 in the width direction is easy, and the fixing operation is also easy.

  Also, instead of the plurality of first insertion holes 41d provided in the width direction member 41, as shown in FIGS. 8A and 8B, a first elongated insertion hole extending along the width direction of the conveyor belt 4 is provided. 41f may be adopted. If the first insertion hole 41f is a long slot, continuous position adjustment in the width direction can be performed continuously. On the other hand, as shown in FIG. 5, if the first insertion hole 41d is a plurality of holes, by selecting a hole through which the shaft member 52 is inserted, a stepwise position to a predetermined width direction position is selected. Adjustments are possible.

  Further, the stretching belt conveyor 1 is provided with an angle adjusting means A3 for changing the angle of the longitudinal member 44 of the upper frame 40 with respect to the horizontal direction. The angle adjusting means A3 is provided in the connecting means 50. The angle of the longitudinal member 44 with respect to the horizontal direction is an elevation angle when the stretching belt conveyor 1 has an upward gradient and a depression angle when the stretching belt conveyor 1 has a downward gradient, and is an axial direction of the longitudinal member 44 extending linearly. Is an angle formed with respect to the horizontal direction.

  Since the place where the stretching belt conveyor 1 is installed is not always limited to the horizontal section, depending on the gradient condition of the installation place, for example, as shown in FIG. In a situation where the column 31 of the frame 30 and the longitudinal member 44 of the upper frame 40 are not perpendicular to each other, the function of the angle adjusting means A3 is used. This is because it is desirable that the column 31 of the lower frame 30 be erected in the vertical direction as much as possible.

  In this embodiment, the angle adjusting unit A3 includes the above-described upper connecting portion 52b provided on the second connecting portion 52 of the connecting unit 50, the shaft member 52d, the bolt 52h, the nut 52i, and the like. The shaft member 52d is swingable about the axis of the bolt 52h as the swing center along the longitudinal direction of the conveyor belt 4, and the shaft member 52d can be fixed at an arbitrary swing angle by tightening the nut 52i. Thus, the fixing angle between the column 31 of the lower frame 30 and the longitudinal member 44 of the upper frame 40 can be adjusted.

  For example, FIG. 7A is a side view when the fixing angle between the column 31 of the lower frame 30 and the longitudinal member 44 of the upper frame 40 is a right angle. On the other hand, FIG. 7B shows that the elevation angle of the longitudinal member 44 with respect to the horizontal direction in the axial direction is α (0 degree <α <90 degrees). And the axial direction of the shaft member 52d of the connecting means 50, the intersection angle of the same angle α is set.

  Another embodiment is shown in FIGS.

  9 and 10, the second position adjusting means A2 includes a connecting member 46 attached to the longitudinal member 44 of the upper frame 40 and a locking portion to the width member 41 provided on the connecting member 46. 46d, and fastening members 46e and 46f for pulling the locking portion 46d toward the longitudinal member 44 side. The fastening members 46e and 46f of this embodiment are a female screw portion 46f and a bolt 46e described later. The locking portion 46 d is locked to the width direction member 41.

  The locking portion 46d is formed of a projecting piece bent at the tip of an arm 46c connected to a base 46a of the connecting member 46 via a hinge 46b. The base 46a is located above the longitudinal member 44, and a female screw portion 46f penetrating the front and back is provided at the center thereof. The female screw portion 46f is provided by welding a nut to a plate material forming the base portion 46a. However, a through hole may be provided in the plate material, and the female screw portion 46f may be provided directly on the inner surface of the through hole.

  By screwing the male thread of the bolt 46e into the female thread 46f, the tip of the bolt 46e contacts the upper surface of the longitudinal member 44. When the bolt 46e is further screwed in, the base 46a of the connecting member 46 receives a force in a direction away from the upper surface of the longitudinal member 44. As a result, the locking portion 46d moves the width member 41 to the longitudinal member 44 side. By pulling up, the upper surface of the width direction member 41 and the lower surface of the longitudinal direction member 44 are brought into close contact with pressure. Thereby, the width direction member 41 and the longitudinal direction member 44 that constitute the upper frame 40 are integrally fixed. Since the longitudinal position of the connecting member 46 with respect to the longitudinal member 44 and the lateral position of the connecting member 46 with respect to the width member 41 are continuously and continuously variable, they can be easily positioned at any relative positions. And can be easily fixed.

  In this embodiment, a storage unit (not shown) having a multi-stage roller is disposed between the head unit having the head pulley 2 and the tail unit having the tail pulley 3. In the storage section, a pair of rollers opposed to each other in the longitudinal direction of the conveyor belt 4 are arranged in multiple stages, and the conveyor belt 4 is looped around the multi-stage rollers. When the opposing rollers approach each other, an extra length is generated in the conveyor belt 4 constituting the conveying portion. Therefore, the tail moving cart C is moved together with the tail pulley 3 to the face side to extend the installation distance of the stretching belt conveyor 1. Can be. A well-known configuration may be adopted as the storage unit. For example, the configuration of Patent Document 1 may be adopted. When a conveyor belt 4 feeding device such as a storage unit is not used, another conveyor belt 4 may be prepared according to the installation length of the stretched belt conveyor 1 after stretching.

  Hereinafter, a procedure for stretching the stretched belt conveyor 1 when a tunnel is constructed using the stretched belt conveyor 1 will be described.

  At the tip end of the tunnel excavation, debris and the like generated by excavation by the cutting face are put into the crusher of the towing vehicle D, and the crushed material is transferred to the conveyor belt 4. The conveyed material is conveyed to the wellhead side as the conveyor belt 4 travels.

  The face moves forward as the excavation progresses. At the same time, the tail moving cart 7 is pulled by the towing vehicle D, and the conveyor belt 4 is extended from the storage section while the tail pulley 3 is moved to the face side. Build a frame for This frame for extension is composed of the same members as the upper frame 40, the lower frame 30, and the connecting means 50 already installed.

  Specifically, the required number of lower frames 30 is raised on the ground G in accordance with the conveyor belt 4 extended for stretching, and the upper frame 40 is attached via the connection means 50. The newly installed upper frame 40 is connected to the end of the existing upper frame 40. Then, the carrier bed 10 and the return bed 20 are attached to the upper frame 40, the conveyor belt 4 is held by the rollers 11, 12, 21 and the operation is started again.

  The metal pipe for the temporary scaffold used for the lower frame 30 is widely used at various construction sites, and therefore does not need to be newly manufactured, and can be easily constructed by combining various existing members. Further, since the member is widely distributed, transportation costs can be suppressed.

  The stretched belt conveyor 1 of this embodiment is assumed to be used for carrying out earth and sand generated at the forefront of excavation in tunnel excavation work, but other uses other than tunnel excavation work, For example, it can be used for transporting earth and sand or the like in a light section. This is particularly effective in a site where the location of a conveyed object such as earth and sand moves with the passage of time. Further, since the installation length of the stretched belt conveyor 1 can be easily adjusted, the stretched belt conveyor 1 can be installed using a common member at various sites where the transport distances are different. In this case, the storage unit is not necessarily required, and the conveyor belt 4 according to the installation length may be prepared.

DESCRIPTION OF SYMBOLS 1 Stretching belt conveyor 2 Head pulley 3 Tail pulley 4 Conveyor belt 5 Guide roller 10 Carrier bed 11, 12 Carrier roller 20 Return bed 21 Return roller 30 Lower frame 31 Column 34 Beam 40 Upper frame 41 Width member 41a Holes 41d, 41f First insertion holes 42, 46 Connecting member 42a Second insertion hole 43a Insertion shaft member 43b Tightening member 44 Longitudinal member 46d Locking portions 46e, 46f Tightening member 50 Connection means 51 First connection portion 52 Second connection portion 52d Shaft members 52f, 52g Tightening member A1 First position adjusting means A2 Second position adjusting means A3 Angle adjusting means G Ground

Claims (8)

A head pulley (2) and a tail pulley (3);
An endless conveyor belt (4) stretched between the head pulley (2) and the tail pulley (3);
Rollers (11, 12, 21) for holding the conveyor belt (4) between the head pulley (2) and the tail pulley (3);
It has a plurality of longitudinal members (44) extending in the longitudinal direction of the conveyor belt (4) and a width member (41) connecting the longitudinal members (44) to each other in the width direction of the conveyor belt (4). An upper frame (40) for supporting the rollers (11, 12, 21);
A lower frame (30) for supporting the upper frame (40) on the ground (G);
Connecting means (50) for connecting the upper frame (40) and the lower frame (30);
First position adjusting means (A1) for changing a relative position of the lower frame (30) and the width direction member (41) with respect to the width direction;
A stretch belt conveyor comprising: Second position adjusting means (A2) for changing the relative position of the width direction member (41) and the longitudinal direction member (44) with respect to the width direction.
The stretch belt conveyor according to claim 1, comprising: The lower frame (30)
A plurality of pillars (31) standing vertically on the ground (G);
A beam portion (34) connecting the pillar portions (31) to each other in the width direction;
A member for a temporary scaffold with
The stretch belt conveyor according to claim 1 or 2, wherein the connection means (50) is connected to an upper end of the pillar (31). The first position adjusting means (A1) includes:
A longitudinal or a plurality of holes (41a) of the width direction member (41),
A shaft member (52d) provided in the connection means (50) and inserted through the hole (41a);
Fastening members (52f, 52g) attached to the shaft member (52d) and fixing the shaft member (52d) to the width direction member (41);
The stretched belt conveyor according to any one of claims 1 to 3, comprising: The second position adjusting means (A2)
A longitudinal or a plurality of first insertion holes (41d, 41f) of the width direction member (41);
A connecting member (42) attached to said longitudinal member (44);
A second insertion hole (42a) of the connection member (42);
An insertion shaft member (43a) inserted through the first insertion hole (41d, 41f) and the second insertion hole (42a);
A fastening member (43b) attached to the insertion shaft member (43a) and fixing the insertion shaft member (43a) to the width direction member (41);
The stretched belt conveyor according to any one of claims 1 to 4, comprising: The second position adjusting means (A2)
A connecting member (46) attached to said longitudinal member (44);
A locking portion (46d) provided on the connecting member (46) to the width direction member (41);
Fastening members (46e, 46f) for pulling the locking portion (46d) toward the longitudinal member (44);
The stretched belt conveyor according to any one of claims 1 to 4, comprising: The connecting means (50) is an angle adjusting means (A3) for changing an angle of the longitudinal member (44) with respect to a horizontal direction.
The stretched belt conveyor according to any one of claims 1 to 6, further comprising: The connecting means (50)
A first connection portion (51) connected to the lower frame (30);
A second connecting portion (52) connected to the width direction member (41);
With
The stretch belt conveyor according to claim 7, wherein the angle adjusting means (A3) is provided at the second connection part (52).

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