JP5599758B2 - Opening closing cover and construction machine provided with the opening closing cover - Google Patents

Description

  The present invention relates to an opening closing cover suitably used for, for example, a hydraulic excavator and a wheel loader, and a construction machine including the opening closing cover.

  In general, a hydraulic excavator as a typical example of a construction machine includes a lower traveling body that can be self-propelled and an upper revolving body that is turnably mounted on the lower traveling body to form a vehicle body as a base body. A work device for performing excavation work or the like is attached to the front part side.

  The upper swing body is a weight of the swing frame that forms the support structure, the cab that is disposed at the left front portion of the swing frame and that defines the cab, and the work device that is disposed at the rear end portion of the swing frame. A counterweight for balancing, an engine, a hydraulic pump, a heat exchanger, an electric device, and other mounted devices disposed on the front side of the counterweight, and a building cover that houses these engines and other mounted devices. ing.

  Here, the upper swing body is provided with a plurality of chambers located on the swing frame. For example, a machine room in which an engine, a hydraulic pump, a heat exchanger, etc. are arranged at the front side of the counterweight, and a utility room, etc., in which electrical equipment is arranged between the machine room and the cab are provided. (For example, refer to Patent Document 1).

  By the way, when it is necessary to arrange a tube body such as a cable and a hose between two chambers, for example, between a machine room and a utility room, an opening is provided in a partition plate that partitions the two chambers. It is conceivable to dispose the pipe body between the two chambers by inserting the pipe body into the section. However, if the opening area of the opening is large with respect to the tube, air may flow between the two chambers through the opening. When it is necessary to block this air flow, it is necessary to close the opening using a cover that can close the opening while allowing the tube to pass through the opening. .

  On the other hand, as a cover (sheet member) for closing the opening (window hole), a cover that is formed in a warm shape by providing a plurality of slits in a flexible plate body is known (for example, Patent Document 2).

JP 2007-170129 A JP 11-123227 A

  It is conceivable that the opening through which the tubular body is inserted is closed by a warm cover according to Patent Document 2. However, simply attaching the warm cover to the opening as it is will cause a plurality of strip-shaped parts constituting the plate body, that is, a tongue-shaped part (saddle-shaped part) having a free end at the tip side, etc. There is a possibility that the air flow between the two chambers cannot be sufficiently blocked.

  The present invention has been made in view of the above-described problems of the prior art, and provides an opening closing cover that can sufficiently block an opening through which a tubular body is inserted, and a construction machine including the opening closing cover. It is aimed.

In order to solve the above-described problem, an opening closing cover of the invention of claim 1 is a flat plate-like flexible material that can be deformed and is attached by closing an opening of a counterpart member, An insertion hole that is provided through the thickness of the plate and through which a tube including a cable and a hose is inserted, and is cut in the plane direction of the plate from one end of the plate to the insertion hole The one end of the plate is provided with a slit that is formed so that the one end is a cut end and the other reaches the insertion hole and allows the tube to pass through the cut end. In addition, an attachment hole is provided at a position different from the cut end of the slit, and the plate body is inserted into the insertion hole of the plate body using the attachment hole in a state where the tube body is inserted through the slit. The one end of the is attached to the opening of the counterpart member That the configuration and the you are with the features.

  On the other hand, the invention of claim 2 is directed to a base on which a working device is attached, a partition plate provided on the base for partitioning two chambers having a pressure difference, an opening provided in the partition plate, and the opening And a tube including a cable and a hose disposed between the two chambers, and an opening closing cover attached to the partition plate by closing the opening.

A feature of the configuration adopted by the invention of claim 2 is that the opening closing cover is formed of a flat plate-shaped flexible material that is attached to the opening of the partition plate; and an insertion hole thickness direction provided through the tubular body of the plate body is inserted, from one end of the plate body of the one by cutting into planar direction of the plate body across said insertion hole An end is formed as a cut end, the other reaches the insertion hole, and is configured by a slit that allows the tube to pass through the cut end, and is one end of the plate body, a position different from the cut end of the slit, the mounting hole is provided, while inserting the tube body through the slit in the insertion hole of said plate member, said one of said plate member using the mounting holes the end that was configured to be attached to the opening portion of the partition plate That.

  According to a third aspect of the present invention, the opening closing cover is positioned in a high-pressure side chamber of the two chambers having the pressure difference and attached to the opening of the partition plate.

According to invention of Claim 1, while forming the slit from which one edge part of this plate body becomes a notch | incision end over the insertion hole from one edge part of a plate body, it is one edge part of a plate body, It is set as the structure which provides an attachment hole in the position different from the cut end of a slit . Thus, in a state of attaching the plate member by using a preparative Tsukeana distal end side of the strip-shaped portions located on both sides of the slit of the plate member (tongue-shaped portion, folds) the counterparty It is pressed against the edge portion of the opening of the member. For this reason, it is possible to make the strip-shaped portion of the plate body difficult to bend, and it is possible to sufficiently block (shield) the opening portion through which the tubular body is inserted. Thereby, the interruption | blocking property between two chambers each provided on both sides of the other party member, for example, and a sealing performance can be improved.

According to invention of Claim 2, the opening obstruction | occlusion cover which obstruct | occludes the opening part of a partition plate forms the slit from which the one edge part of this board body becomes a notch end ranging from one edge part of a board body to an insertion hole In addition , the mounting hole is provided at one end of the plate body at a position different from the cut end of the slit . Thus, in a state of attaching the plate member by using a preparative Tsukeana distal end side of the strip-shaped portions located on both sides of the slit of the plate member (tongue-shaped portion, folds) of the partition It is pressed against the edge part of the opening of the plate. For this reason, the strip-shaped part of the plate can be made difficult to bend, and the opening through which the tubular body is inserted can be sufficiently blocked. Thereby, the interruption | blocking property between two chambers with a pressure difference divided by the partition plate and a sealing performance can be improved, and the reliability of a construction machine can be improved.

  According to the third aspect of the present invention, since the opening closing cover is attached to the high pressure side chamber of the two chambers having a pressure difference, the pressure applied to the opening closing cover based on the pressure difference between the two chambers (relative Pressure) is a pressure in a direction in which the outer peripheral edge portion of the plate body is pressed against the peripheral edge portion of the opening of the partition plate. Thereby, the strip-shaped part of the plate body can be made more difficult to bend, and the blocking property and sealing property between the two chambers can be further improved.

1 is a front view showing a hydraulic excavator according to an embodiment of the present invention. It is a perspective view which shows an upper revolving body in the state which removed the front door and the rear door. It is a top view which omits a building cover etc. and shows an upper revolving body. It is a perspective view which shows the state which attached the turning apparatus, the partition plate, the opening obstruction | occlusion cover, etc. on the turning frame. It is a perspective view equivalent to the (V) part in FIG. 4 which shows a partition plate, an opening obstruction | occlusion cover, etc. It is a front view which shows an opening obstruction | occlusion cover alone. It is a front view which shows the opening obstruction | occlusion cover by the 1st modification of this invention alone. It is a front view which shows the opening obstruction | occlusion cover by the 2nd modification of this invention alone. It is a front view which shows the opening obstruction | occlusion cover by the 3rd modification of this invention alone.

  Hereinafter, an embodiment in which an opening closing cover and a construction machine including the opening closing cover according to the present invention are applied to a hydraulic excavator will be described as an example, and will be described in detail with reference to FIGS. 1 to 6.

  In the figure, reference numeral 1 denotes a hydraulic excavator as a typical example of a construction machine. The hydraulic excavator 1 is a self-propelled crawler-type lower traveling body 2 and an upper swing that is rotatably mounted on the lower traveling body 2. The body 3 constitutes a vehicle body as a base. A work device 4 is attached to the front side of the upper swing body 3 so as to be able to move up and down, and the work device 4 performs excavation work of earth and sand.

  Reference numeral 5 denotes a revolving frame serving as a base of the upper revolving structure 3, and the revolving frame 5 is formed in a thick flat plate shape and extends in the front and rear directions as shown in FIG. The left vertical plate 7 and the right vertical plate 8 which are erected on the left and right and extend in the front and rear directions while facing the left and right sides, the left extension beam 9 provided to protrude from the left vertical plate 7 to the left side, A right overhanging beam 10 extending rightward from the vertical plate 8, a left side frame 11 which is fixed to the front end side of each left overhanging beam 9 and extends in the front and rear directions, and a front end side of each right overhanging beam 10 The right side frame 12 that is fixed to the front and extends in the front and rear directions is roughly configured to form a strong support structure.

  Here, a turning device 31 described later is provided between the left and right vertical plates 7 and 8 at an intermediate portion in the front and rear directions of the bottom plate 6. On the other hand, the working device 4 is attached to the front end sides of the left and right vertical plates 7 and 8, and the counterweight 20 described later is attached to the rear end sides of the left and right vertical plates 7 and 8. Yes.

  Reference numeral 13 denotes an engine as a prime mover located on the front side of the counterweight 20 and disposed on the rear side of the swing frame 5. The engine 13 is located on the left and right vertical plates 7 and 8 on the left side of the swing frame 5. It is arranged in a horizontal state extending in the right direction. A cooling fan 13A is attached to the left end side of the engine 13, and a hydraulic pump 14 for supplying pressure oil for operation to various hydraulic actuators mounted on the hydraulic excavator 1 is attached to the right end side of the engine 13. It has been.

  A heat exchanger 15 is located on the left side of the engine 13 and mounted on the revolving frame 5. The heat exchanger 15 includes a support frame 16, a radiator 17 supported by the support frame 16, and an oil cooler 18. Etc., and is detachably attached to the revolving frame 5.

  Here, the support frame 16 of the heat exchanger 15 is a front partition as a partition plate provided on the revolving frame 5 so as to face the front partition cover 25 (see FIG. 2) described later and the utility chamber 29 therebetween. The plate 16A, a rear partition plate 16B provided on the front side of the counterweight 20, and a connecting plate 16C for connecting the front partition plate 16A and the upper end side of the rear partition plate 16B are roughly configured. The support frame 16 supports a radiator 17 that cools engine coolant, an oil cooler 18 that cools hydraulic oil, and the like.

  The front partition plate 16A constituting the support frame 16 partitions the utility chamber 29 having a pressure difference from the machine chamber 28 (heat exchanger front chamber 28B). As shown in FIG. 4, a substantially rectangular opening 16A1 is provided. The opening 16A1 is in a state in which two cables 38 and 39 and one hose 40 disposed between the utility chamber 29 and the machine chamber 28 (the heat exchanger front chamber 28B) are inserted, which will be described later. It is closed by the opening closing cover 41 of.

  Reference numeral 19 denotes a cab provided on the left side of the front portion of the revolving frame 5, and the cab 19 defines a cab. Reference numeral 20 denotes a counterweight provided on the rear end side of the revolving frame 5, and the counterweight 20 balances the weight with the work device 4. A hydraulic oil tank 21 is provided on the right side of the front portion of the revolving frame 5. The hydraulic oil tank 21 stores hydraulic oil supplied to various hydraulic actuators.

  Next, reference numeral 22 denotes a building cover that is located on the front side of the counterweight 20 and is provided on the revolving frame 5. The building cover 22 includes the engine 13, the hydraulic pump 14, and the heat exchange mounted on the revolving frame 5. It covers the vessel 15 and the like. Here, the building cover 22 includes a top plate 23, a bonnet 24, a support frame 16 of the heat exchanger 15, a front partition cover 25, a left front door 26, a left rear door 27, and the like which will be described later. .

  The upper side of the building cover 22 is partitioned by the top plate 23 and the bonnet 24, the left side of the building cover 22 is partitioned by the left front door 26 and the left rear door 27, and the right side of the building cover 22 is the right side. It is partitioned by a door (not shown). Further, the front side of the building cover 22 is partitioned by the hydraulic oil tank 21 and the front partition cover 25, and the rear side of the building cover 22 is a rear partition plate 16 </ b> B that constitutes the support frame body 16 of the heat exchanger 15 and a counterweight. It is configured to be partitioned by 20.

  Reference numeral 25 denotes a front partition cover (see FIG. 2) provided between the cab 19 and the heat exchanger 15, and the front partition cover 25 constitutes a part of the building cover 22. Here, the front partition cover 25 faces the support frame 16 (front partition plate 16A) of the heat exchanger 15 with a space in the front and rear directions, and partitions the left front side of the building cover 22.

  Reference numeral 26 denotes a left front door (see FIG. 1) attached to the front partition cover 25 so as to be openable and closable. The left front door 26 is rotatably supported by the front partition cover 25 via a hinge member. Yes. The left front door 26 opens and closes a utility chamber 29 (to be described later) by rotating forward and backward about the position of the front partition cover 25.

  Reference numeral 27 denotes a left rear door (see FIG. 1) provided on the rear side of the left front door 26. The left rear door 27 is hinged to a rear partition plate 16B constituting the support frame 16 of the heat exchanger 15. It is rotatably supported via the member. The left rear door 27 opens and closes a heat exchanger front chamber 28B, which will be described later, by rotating forward and backward about the position of the rear partition plate 16B.

  28 is a machine room located on the revolving frame 5 and formed in the building cover 22. The machine room 28 includes an upper plate 23, a bonnet 24, a left rear door 27, and a right door ( (Not shown), a counterweight 20 and a hydraulic oil tank 21. The machine room 28 includes an engine room 28A and a heat exchanger front room 28B which are adjacent to each other with the heat exchanger 15 interposed therebetween.

  Here, the engine room 28A in which the engine 13, the hydraulic pump 14 and the like are housed includes an upper surface plate 23 of the building cover 22, a bonnet 24 and a right door (not shown), a support frame 16 of the heat exchanger 15, The counterweight 20 and the hydraulic oil tank 21 are defined.

  On the other hand, the heat exchanger front chamber 28B formed on the opposite side of the engine chamber 28A across the heat exchanger 15 includes the top plate 23 and the left rear door 27 constituting the building cover 22, the heat exchanger 15, And is configured to be opened and closed by the left rear door 27. Here, in the heat exchanger front chamber 28B, air (outside air) flows from the inlet (not shown) of the left rear door 27 by the cooling fan 13A that is rotationally driven by the engine 13, and the heat exchanger front chamber 28B. The air flowing into 28B is supplied as cooling air to the radiator 17, the oil cooler 18, and the like. For this reason, the pressure (pressure) inside the heat exchanger front chamber 28B is lower than the atmospheric pressure.

  29 is a utility room formed in the building cover 22 together with the machine room 28, and the utility room 29 includes an upper plate 23 and a left front door 26 constituting the building cover 22, and the support frame 16 of the heat exchanger 15. It is defined by the front partition plate 16A to be configured. Here, an air cleaner 30 for cleaning the intake air sucked into the engine 13 is disposed in the utility chamber 29. The utility chamber 29 is a chamber on the high pressure side with respect to the heat exchanger front chamber 28B, which has a lower pressure than the atmospheric pressure, because the atmospheric pressure (pressure) in the utility chamber 29 is substantially the same as the atmospheric pressure.

  Next, reference numeral 31 denotes a turning device mounted on the turning frame 5. The swivel device 31 is positioned between the left and right vertical plates 7 and 8 constituting the swivel frame 5 and is erected at the center of the bottom plate 6. Here, the turning device 31 turns the upper turning body 3 supported on the lower traveling body 2, and a speed reducer 32 attached to the bottom plate 6 of the turning frame 5, and an upper end portion of the speed reducer 32. The AC type electric motor 33 attached and a hydraulic motor 34 attached to the upper end side of the electric motor 33 are roughly configured. The turning device 31 is a so-called hybrid turning device in which the electric motor 33 and the hydraulic motor 34 cooperate to drive the upper turning body 3 to turn.

  Reference numeral 35 denotes a first electric device disposed in the utility chamber 29, and the first electric device 35 is connected to the electric motor 33 using a first cable 37 described later. Here, the first electric device 35 includes a box 35A, and an inverter circuit for converting a drive current supplied to the electric motor 33 from a direct current to an alternating current, and a booster in the box 35A. An electrical component (not shown) such as a step-down chopper circuit is accommodated.

  A water jacket (not shown) is provided inside the box 35A of the first electrical device 35, and an inlet side connection portion 35B for introducing cooling water into the water jacket is provided on the left side of the box 35A. And an outlet side connection portion 35C for discharging cooling water from the water jacket. A hose 40 which will be described later is connected to the inlet side connection portion 35 </ b> B, and cooling water from a radiator (not shown) is supplied through the hose 40. On the other hand, a hose (not shown) is also connected to the outlet side connection portion 35C, and the cooling water can be returned from the water jacket to the radiator (circulating the cooling water) through the hose.

  A connector mounting projection 35D is provided on the upper surface of the box 35A, and first and second device-side connectors 35E and 35F are provided on the front surface of the connector mounting projection 35D. The first and second device-side connectors 35E and 35F are connected to electrical components such as an inverter circuit housed in the box 35A. The first device-side connector 35E is connected to a later-described cable-side connector 37A, and the second-device-side connector 35F is connected to a later-described cable-side connector 38A.

  Reference numeral 36 denotes a second electric device disposed in the heat exchanger front chamber 28B, and the second electric device 36 is connected to the first electric device 35 using a second cable 38 described later. Is. Here, the second electrical device 36 includes a box 36A and an electrical component (not shown) including a capacitor or a battery or the like in order to store electric energy stored in the box 36A and driving the electric motor 33. ). The capacitor in the second electric device 36 charges the regenerative energy generated by the electric motor 33 as electric energy when the electric motor 33 is braked, and discharges the electric energy toward the electric motor 33. is there. The second electric device 36 is configured by connecting a plurality of capacitors.

  A connector mounting projection 36B is provided on the upper surface of the box 36A of the second electrical device 36, and a third device-side connector 36C is provided on the front surface of the connector mounting projection 36B. The third device-side connector 36C is connected to an electrical component housed in the box body 36A. A cable-side connector 38B described later is connected to the third device-side connector 36C.

  Reference numeral 37 denotes a first cable that electrically connects the electric motor 33 and the first electric device 35. A cable-side connector 37 </ b> A having a connection terminal (not shown) disposed therein is provided at the end of the first cable 37 on the first electric device 35 side. The cable-side connector 37A of the first cable 37 is configured to be connected to the first device-side connector 35E attached to the connector attachment protrusion 35D of the first electric device 35.

  Reference numeral 38 denotes a second cable as a tubular body that electrically connects the first electric device 35 and the second electric device 36, and the second cable 38 is connected to the utility chamber 29 and the heat exchange chamber. It is inserted into the opening 16A1 of the front partition plate 16A that partitions the space between the utility chamber 29 and the pre-heat exchange chamber 28B. Here, at both ends of the second cable 38, cable-side connectors 38A and 38B having connection terminals (not shown) disposed therein are provided. The cable-side connector 38A on one end side is connected to the second device-side connector 35F attached to the connector attachment projection 35D of the first electric device 35, and the cable-side connector 38B on the other end side is connected to the second device-side connector 35F. It is configured to be connected to a third device-side connector 36C attached to the connector attachment protrusion 36B of the electrical device 36.

  Therefore, the electric motor 33 and the first electric device 35 are electrically connected via the first cable 37, and the first electric device 35 and the second electric device 36 are connected between the second electric device 35 and the second electric device 36. It is electrically connected via a cable 38. Thus, when the swivel device 31 is operated, the electric energy discharged from the second electric device 36 is supplied to the electric motor 33 as an alternating current through the first electric device 35, and the electric motor 33 is rotationally driven. To do. On the other hand, when the turning device 31 is braked, the regenerative energy generated by the inertial rotation of the electric motor 33 is stored in the second electric device 36.

  Reference numeral 39 denotes a third cable as a tube for grounding the first electric device 35. The third cable 39 is connected to the utility chamber 29 and the heat in the same manner as the second cable 38 described above. It is inserted through the opening 16A1 of the front partition plate 16A that partitions the pre-exchange chamber 28B, and is disposed between the utility chamber 29 and the pre-exchange chamber 28B.

  Reference numeral 40 denotes a hose as a tubular body for supplying cooling water to the first electrical device 35. The hose 40 is similar to the second cable 38 and the third cable 39 described above, and is connected to the utility chamber 29 and the heat. It is inserted through the opening 16A1 of the front partition plate 16A that partitions the pre-exchange chamber 28B, and is disposed between the utility chamber 29 and the pre-exchange chamber 28B. This hose 40 is provided on the inlet side connecting portion 35B of the box body 35A and the heat exchange front chamber 28B side in order to supply cooling water to the water jacket provided inside the box body 35A of the first electric device 35. And a radiator (not shown).

  Next, the opening closing cover 41 that closes the opening 16A1 of the front partition plate 16A will be described.

  That is, reference numeral 41 denotes an opening closing cover which is attached to the front partition plate 16A by closing the opening 16A1, and the opening closing cover 41 is a utility on the high pressure side of the utility chamber 29 having a pressure difference and the pre-heat exchange chamber 28B. It is located on the chamber 29 side and is attached to the opening 16A1 of the front partition plate 16A. Here, as shown in FIGS. 5 and 6, the opening closing cover 41 is roughly configured by a plate body 42, which will be described later, an insertion hole 43, a plurality of (two) slits 44, and a mounting hole 45. ing.

  Reference numeral 42 denotes a plate body which is attached by closing the opening 16A1 of the front partition plate 16A. The plate body 42 is a flat and deformable rubber (for example, NBR: nitrile butadiene rubber, urethane rubber). Etc.) and is made of a material such as an elastomer. Here, the plate body 42 includes a plurality (three pieces) of strip-shaped portions (tongue-shaped portions, hook-shaped portions) 42A positioned on both sides of a slit 44 described later, and the strip-shaped portions 42A. It is comprised by the base part 42B which connects a base end side (lower end side).

  Reference numeral 43 denotes a plurality of (three) insertion holes provided penetrating in the thickness direction of the plate body 42. Each of the insertion holes 43 includes the second cable 38, the third cable 39, and the hose 40, respectively. It is inserted (inserted). Here, the insertion hole 43 through which the second cable 38 is inserted and the insertion hole 43 through which the hose 40 is inserted are arranged so as to overlap in the upward and downward directions. The insertion hole 43 through which the third cable 39 is inserted is shifted to the left and right with respect to the insertion hole 43 through which the second cable 38 is inserted and the insertion hole 43 through which the hose 40 is inserted. Is provided.

  Each insertion hole 43 is formed as a circular hole having an inner diameter substantially the same as the outer diameter of the second cable 38, the third cable 39, and the hose 40. Thereby, each insertion hole 43 can insert (insert) the second cable 38, the third cable 39, and the hose 40 in a state where there is almost no gap on the inner peripheral surface thereof. Accordingly, the heat exchanger front chamber 28B, the utility chamber 29, and the strip-shaped portions 42A constituting the plate body 42 are prevented from being bent by the second cable 38, the third cable 39, and the hose 40. It is possible to improve the shielding property and sealing property between the two.

  Reference numeral 44 denotes a plurality of (two) slits 44 formed by cutting in the planar direction of the plate body 42 from the upper end portion, which is one end portion of the plate body 42, to the insertion holes 43. These slits 44 are formed from the second cable 38, the third cable 39, and the hose 40 through the insertion holes 43, respectively, from the cut end 44 </ b> A side of the second cable 38. By passing the third cable 39 and the hose 40, the second cable 38, the third cable 39, and the hose 40 can be inserted into (inserted into) the insertion holes 43.

  Reference numeral 45 denotes a plurality (three) of mounting holes provided on the front end side of the strip-shaped portion 42 </ b> A constituting the plate body 42, and each mounting hole 45 is an upper end portion which is one end portion of the plate body 42. Therefore, the slit 44 is provided at a position different from each cut end 44A (a position deviated leftward and rightward from each cut end 44A). Each mounting hole 45 is inserted with a screw 46 that is screwed into a screw hole (not shown) provided at an edge of the opening 16A1 of the front partition plate 16A. And a screw 46 are used to attach to the opening 16A1 of the front partition plate 16A.

  In the state where the plate body 42 is attached using the attachment holes 45 as described above, the leading end side of each strip-like portion 42A located on both sides of the slit 44 in the plate body 42 is connected by the screw 46 to the front partition plate 16A. Is pressed against the edge portion of the opening 16A1. For this reason, the strip-shaped part 42A of the plate body 42 can be made difficult to bend, and the opening 16A1 through which the second cable 38, the third cable 39, and the hose 40 are inserted can be sufficiently blocked.

  Reference numeral 47 denotes a cover attached to the box 36 </ b> A of the second electric device 36. The cover 47 is composed of a plate body bent into an L-shaped cross section, and includes a third device-side connector 36C attached to the connector attachment protrusion 36B and a second device connected to the third device-side connector 36C. The cable side connector 38B of the cable 38 is covered.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. The hydraulic excavator 1 is self-propelled to the work site by the lower traveling body 2 and works while the upper revolving body 3 is swung by the swiveling device 31. Sediment excavation work is performed using the device 4.

  In this case, when the excavator 1 is operated, the cooling fan 13A rotates as the engine 13 is driven, and air (outside air) flows into the heat exchanger front chamber 28B from the inlet of the left rear door 27. The air flowing into the heat exchanger front chamber 28B is supplied as cooling air to the radiator 17, the oil cooler 18, and the like. As a result, the heat exchanger front chamber 28B has a lower internal pressure (pressure) than the atmospheric pressure and a lower pressure than the utility chamber 29 where the internal pressure is the atmospheric pressure. A pressure difference is generated between 28B and the utility chamber 29.

  Here, according to the present embodiment, the opening closing cover 41 is provided in the opening portion 16A1 of the front partition plate 16A that partitions the heat exchanger front chamber 28B and the utility chamber 29. For this reason, regardless of the pressure difference between the heat exchanger front chamber 28B and the utility chamber 29, the opening blocking cover 41 can prevent air from flowing from the utility chamber 29 to the heat exchanger front chamber 28B. Thereby, the air (hot air) of the utility chamber 29 heated by the heat generated by the first electrical device 35 can be prevented from flowing into the heat exchanger front chamber 28B. As a result, it is possible to suppress the cooling efficiency of the radiator 17, the oil cooler 18, and the like of the heat exchanger 15 from being lowered, and to improve the performance and reliability of the heat exchanger 15 and thus the hydraulic excavator 1. Can do.

  Next, a procedure for attaching the opening closing cover 41 to the opening 16A1 of the front partition plate 16A will be described.

  First, the second cable 38, the third cable 39, and the hose 40 are inserted into the opening 16A1 of the front partition plate 16A, and the second cable 38, the third cable 39, and the hose 40 are connected to the front chamber of the heat exchanger. 28B and the utility room 29 are disposed. Then, the second cable is inserted into the slit 44 of the opening closing cover 41 while moving the opening closing cover 41 upward from the lower side of the cables 38 and 39 and the hose 40 with the cut end 44A side being the upper side. 38, the third cable 39, and the hose 40 are passed, and the second cable 38, the third cable 39, and the hose 40 are inserted into (inserted into) the insertion holes 43 of the opening closing cover 41.

  If the second cable 38, the third cable 39, and the hose 40 are inserted (fitted) into the insertion holes 43 of the opening closing cover 41, the mounting holes 45 of the opening closing cover 41 and the screws of the front partition plate 16A The holes 46 are aligned with each other, and the screws 46 are screwed into the screw holes of the front partition plate 16 </ b> A while being inserted into the mounting holes 45. Thereby, the opening obstruction | occlusion cover 41 can be attached to opening part 16A1 of 16 A of front partition plates.

  According to the present embodiment, the opening closing cover 41 that closes the opening 16A1 of the front partition plate 16A is provided with the mounting hole 45 at a position different from the cut end 44A of the slit 44 on the upper end portion of the plate body 42. Since the plate body 42 is attached using the attachment hole 45, the front end side of each strip-shaped portion 42 </ b> A of the plate body 42 is attached to the front partition plate 16 </ b> A by a screw 46 inserted through the attachment hole 45. It is pressed against the edge portion of the opening 16A1. Therefore, regardless of the pressure difference between the heat exchanger front chamber 28B and the utility chamber 29, the strip portions 42A of the plate body 42 can be made difficult to twist, and the second cable 38, the third cable 39, the opening 16A1 through which the hose 40 is inserted can be sufficiently blocked (shielded). Thereby, the interruption | blocking property between the heat exchanger front chamber 28B and the utility chamber 29 with the pressure difference partitioned by the partition plate 16A can be improved, and the reliability of the hydraulic excavator 1 can be improved. Can be improved.

  In addition, according to the present embodiment, the opening closing cover 41 is attached to the utility chamber 29 which is the high pressure side chamber of the heat exchanger front chamber 28B and the utility chamber 29 having a pressure difference. The pressure (relative pressure) applied to the opening closing cover 41 based on the pressure difference between the exchanger front chamber 28B and the utility chamber 29 holds the outer peripheral edge portion of the plate body 42 against the peripheral edge portion of the opening 16A1 of the front partition plate 16A. It is the pressure in the direction of attachment. That is, the front end side of each strip-shaped portion 42A of the plate body 42 can be pressed against the peripheral portion of the opening 16A1 not only by the screw 46 but also by a pressure difference. Thereby, each strip-shaped part 42A of the plate body 42 can be made more difficult to bend, and the shielding property and the sealing property between the heat exchanger front chamber 28B and the utility chamber 29 can be further enhanced.

  In the above-described embodiment, the case where the three insertion holes 43 are provided in the plate body 42 constituting the opening blocking cover 41 has been described as an example. However, the present invention is not limited to this. For example, according to the number of cables and hoses inserted through the opening 16A1, the size of the opening 16A1, and the like, the first modification shown in FIG. May be.

  That is, a configuration in which three or more insertion holes 53 are provided, for example, by providing six insertion holes 53 in the plate body 52 constituting the opening closing cover 51 may be adopted. In this case, the plate body 52 is provided with six slits 54 extending from the upper end portion which is one end portion of the plate body 52 to each insertion hole 53. Accordingly, the plate body 52 is configured by seven strip-shaped portions 52A positioned on both sides of each slit 54 and a base portion 52B that connects the base end side (lower end side) of the strip-shaped portion 52A. can do. The plate 52 is placed at the front end side of each strip-shaped portion 52A constituting the plate 52, that is, at the upper end of the plate 42 and at a position different from the cut ends 54A of the slits 54A. An attachment hole 55 for attachment to the opening 16A1 is provided.

  In the above-described embodiment and the first modification, the case where the mounting holes 45 and 55 are provided in all the strip-like portions 42A and 52A constituting the plates 42 and 52 will be described as an example. did. However, the present invention is not limited to this. For example, as in the second modification shown in FIG. 8, all the strips such as the mounting holes 55 provided at every other end of the strip-shaped portion 52 </ b> A are provided. It is good also as a structure which does not provide the attachment hole 55 corresponding to 52 A of shape parts (it may comprise so that the front end side of some strip-shaped parts 52A may become a free end).

  Even when the mounting holes 55 are provided every other piece in this way, for example, at the front end side of the strip-shaped portion 52A, the opening of the front partition plate 16A is based on the pressure difference between the heat exchanger front chamber 28B and the utility chamber 29. The pressure in the pressing direction is applied to the edge portion of the portion 16A1. For this reason, even for the strip-shaped portion 52A (the strip-shaped portion 52A having a free end on the front end side) in which the mounting hole 55 is not provided, it can be made difficult to bend by the force (pressure) applied based on the pressure difference, and the opening portion 16A1. Can be sufficiently blocked.

  In the first and second modified examples described above, the case where one insertion hole 53 is provided for one slit 54 has been described as an example. However, the present invention is not limited to this. For example, two insertion holes 53 are provided for one slit 54 as in the third modification shown in FIG. A plurality of insertion holes may be provided.

  Further, in the above-described embodiment and each modification, there is an example in which the opening blocking covers 41 and 51 are provided in the opening 16A1 of the partition plate 16A that partitions the heat exchanger front chamber 28B and the utility chamber 29. And explained. However, the present invention is not limited to this. For example, it is provided at the opening of the partition plate that partitions the other two chambers, such as the opening of the partition plate that partitions the engine chamber and the control chamber adjacent to the engine chamber. You can also. In this case, the engine chamber becomes larger than the atmospheric pressure when the cooling air is supplied by the cooling fan, and therefore the opening of the partition plate that partitions the engine chamber and the control chamber that becomes the atmospheric pressure is closed. In this case, an opening closing cover can be attached to the engine chamber side which is the high pressure side chamber.

  Further, in the above-described embodiment, the hydraulic excavator 1 including the crawler type lower traveling body 2 has been described as an example of the construction machine. However, the present invention is not limited to this, and may be applied to, for example, a hydraulic excavator provided with a wheel-type lower traveling body. Besides, it can be widely applied to other construction machines such as wheel loaders, dump trucks, lift trucks and the like.

1 Excavator (construction machine)
2 Lower traveling body (base)
3 Upper swing body (base)
16A Front divider (partition plate)
16A1 Opening 28A Heat exchanger front chamber (low pressure side chamber)
29 Utility room (high-pressure room)
38 Second cable (tube)
39 Third cable (pipe)
40 hose
41, 51 Opening closing cover 42, 52 Plate body 43, 53 Insertion hole 44, 54 Slit 44A, 54A Cutting end 45, 55 Mounting hole

Claims (3)

A plate body made of a flexible material that can be deformed in a flat plate shape and closed by closing the opening of the counterpart member;
A through hole through which a pipe body including a cable and a hose is inserted and provided in the thickness direction of the plate body;
By cutting in the plane direction of the plate body from one end portion of the plate body to the insertion hole, the one end portion is formed as a cut end, and the other reaches the insertion hole, and the cut end Bei example a slit capable of passing the tube body from,
The cutting edge different from the position of the slit a one end of the plate body is provided with a mounting hole,
In the state where the tube body is inserted through the slit into the insertion hole of the plate body, the one end of the plate body is attached to the opening of the counterpart member using the attachment hole. Opening obstruction cover. A base body to which a working device is attached; a partition plate provided in the base body for partitioning two chambers having a pressure difference; an opening portion provided in the partition plate; In a construction machine comprising a cable body including a disposed cable and a hose, and an opening closing cover attached to the partition plate by closing the opening.
The opening closing cover is
A plate body made of a flexible material capable of being deformed in a flat plate shape and attached to the opening of the partition plate;
An insertion hole provided penetrating in the thickness direction of the plate body and through which the tubular body is inserted;
By cutting in the plane direction of the plate body from one end portion of the plate body to the insertion hole, the one end portion is formed as a cut end, and the other reaches the insertion hole, and the cut end And a slit that allows the tube to pass through ,
The cutting edge different from the position of the slit a one end of the plate body is provided with a mounting hole,
In the state where the tube body is inserted through the slit into the insertion hole of the plate body, the one end of the plate body is attached to the opening of the partition plate using the attachment hole. And construction machinery.   3. The construction machine according to claim 2, wherein the opening closing cover is configured to be positioned in a high-pressure side chamber of the two chambers having the pressure difference and attached to the opening of the partition plate.

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