JP6487686B2 - Loading platform lifting device - Google Patents

Description

  The present invention relates to a hydraulically driven load receiving table lifting device provided in a cargo handling vehicle.

  The following Patent Document 1 has been proposed as this type of load receiving table lifting device. The load receiving table lifting device of Patent Document 1 is a device in which a power unit that operates a hydraulic cylinder is housed in a mounting member provided on a vehicle body frame so as to be freely inserted and removed.

  The hydraulic piping connected to the power unit and disposed in the mounting member is fixed to the vehicle body frame side in order to be connected to the hydraulic cylinder. On the other hand, since the power unit moves relative to the mounting member as the power unit is put in and out, it is necessary to arrange hydraulic piping so as to allow the movement.

  When the power unit is inserted or removed, it is necessary to prevent the hydraulic piping and the electrical wiring connected to the power unit from controlling the supply of hydraulic pressure, for example, by tangling or stretching in the mounting member. There is. In particular, paying attention to the “stretching”, as shown in FIG. 14, when the power unit 502 is pushed into the mounting member 501, at least the hydraulic pipe 503 is curved at the innermost side in the pushing direction, and “substantially U-shaped”. The power unit 502 is smoothly housed as it is pushed in sequentially. However, when the hydraulic pipe 503 is bent (bent) on the front side (drawer side) from the farthest side, the bent portion 503X (circled portion in the figure) is in close contact with the inner surface of the mounting member 501. Since the hydraulic piping 503 is less likely to move to the back side (pushing side) due to friction caused by the friction, the power unit 502 cannot be pushed smoothly or sometimes cannot be pushed, that is, the pushing of the power unit 502 is hindered. Sometimes. However, this point was not particularly considered in the device according to Patent Document 1.

Japanese Utility Model Publication No. 1-173032

  Then, an object of this invention is to provide the load receiving platform raising / lowering device which suppressed that pushing of the power unit was inhibited.

The present invention is a vehicle-side structural member provided with a load receiving table, the cross member extending in the vehicle width direction, and housed in the cross member, and can be pulled out along the longitudinal direction of the cross member. A power unit that is a hydraulic drive source for moving up and down, and a power unit external hydraulic pipe and a power unit external electrical wiring that are partly located in the cross member and connected to the power unit, at least the power unit The power unit external hydraulic pipe can be pulled out and pushed in from one end side in the longitudinal direction of the cross member. It extends to the other end side in the longitudinal direction of the cross member, curves at the other end side and reverses the direction. After extending to the one end side, penetrating the cross member and extending to the outside of the cross member, and at least a part of the power unit external hydraulic pipe located within a predetermined distance from the connection location to the other end side Is provided in a state where the power unit is housed in the cross member in a state where the power unit is housed in the cross member. wherein a receiving platform lifting device that is provided on the other end of the cross member longitudinally than penetrating portions cross member.

  In the above-described configuration, at least a part of the hydraulic piping outside the power unit, which is located within a predetermined distance from the connection point to the power unit to the other end side, is guided by the guide portion so as to draw a constant trajectory, Pushed with the power unit. For this reason, it can suppress that curvature (deflection) arises in the location which is not an original curved location within the said predetermined distance. Therefore, it is possible to suppress the bending portion from being caught on the inner surface of the cross member, and the power unit hydraulic pipe from becoming difficult to be pushed by friction between the bending portion and the inner surface of the cross member.

  Moreover, the said guide part can guide the front-end | tip part of the said other end side among what is located in the said predetermined distance by the said hydraulic piping outside a power unit.

  In the above configuration, the other end side of the hydraulic unit outside the power unit is guided, so that when the power unit is pushed, all other parts located within the predetermined distance are also guided to the other end side. .

  In addition, the guide portion may move to the other end side in conjunction with the movement of the power unit when the power unit is pushed.

  In the said structure, since a guide part interlock | cooperates with the movement of a power unit, when a power unit is pushed in, a guide part also moves to the other end side. For this reason, in the section on the other end side of the guide portion, it is possible to suppress the occurrence of a curve (flexure) other than the curve for the reversal in the hydraulic piping outside the power unit, and to reverse the direction as the power unit moves. Can be smoothly formed.

  In addition, the guide portion is more than ½ of the longitudinal distance of the cross member from the connection position to the power unit to the reversing end of the hydraulic piping outside the power unit in a state where the power unit is housed in the cross member. It is the said other end side, and can be located in the said one end side rather than the starting point of the said curve.

  In the said structure, a guide part can be located in the start point vicinity of the part which curves in a stored state. For this reason, it can suppress that curves (flexure) other than the curve for the said inversion generate | occur | produce in the hydraulic piping outside a power unit between the connection location to a power unit and the part curved.

  The power supply unit includes a juxtaposed member extending along a predetermined length with respect to the hydraulic piping outside the power unit, and the juxtaposed member has a base end portion fixed to the power unit, a tip end portion having the guide portion, The guide portion may fix the hydraulic piping outside the power unit.

  In the above configuration, the same distance as the power unit can be moved in the section from the proximal end portion to the distal end portion of the juxtaposed member in the hydraulic piping outside the power unit. For this reason, bending does not arise in the hydraulic piping outside the power unit in the section.

  In this invention, it can suppress that a curve (deflection) arises in the location which is not an original curved location. For this reason, it can suppress that a bending part gets caught in the inner surface of a cross member, and it becomes difficult to push hydraulic power piping outside a power unit by friction with a bending part and the inner surface of a cross member. Therefore, it is possible to provide a load receiving table lifting device that suppresses the pushing of the power unit.

1 is an overall view of a cargo bed lifting device in an embodiment of the present invention. It is a whole rear view of the power unit. It is the figure which looked at the valve block from the drawer side end face. FIG. 3 is a rear view in which a part of FIG. 2 is enlarged. It is a top view of the power unit, (a) is an overall plan view of a state where the power unit is housed in a cross member, (b) is a plan view of a state where a part of the power unit is pulled out. It is YY sectional drawing in FIG. 2 of the oil tank. It is the figure which looked at the same power unit from the gate type cover side. (A) is the perspective view which showed schematically the relationship between the cross member and a power unit, (b) is the figure which shows the outline of the electrical wiring inside and outside the cross member. (A) is a perspective view on the plane side showing the cross member, power unit, and hydraulic piping, and (b) is a perspective view on the front side of the vehicle showing the cross member, power unit, and hydraulic piping. It is a perspective view by the side of the side which shows arrangement | positioning of the hydraulic piping in the cross member. (A) is the schematic of the cross-sectional view which shows the state by which the power unit is not pulled out with respect to the cross member, (b) is the cross-sectional view which shows the state where the power unit was pulled out with respect to the cross member FIG. The guide part (pipe wiring fixing part) is shown together with a cross member and a power unit, (a) is a plan view, and (b) is a view as seen from the front side of the vehicle. (A) (b) is the schematic of the other example which shows a guide part. It is the schematic which shows the bending generate | occur | produced in the hydraulic piping outside a power unit at the time of a power unit being pushed in.

  Hereinafter, a power unit according to an embodiment of the present invention will be described. This power unit drives an actuator of a load receiving table lifting device mounted on a truck. In other words, the power unit is a hydraulic drive source for operating the cargo cradle provided in the truck. Prior to the description of the power unit, a schematic configuration of the truck and the receiving platform lifting device will be described.

  Referring to FIG. 1, a cargo box 1 having a cargo bed 3 on a vehicle body 2 is mounted on a truck 1. At the rear portion of the vehicle body 2, a load receiving platform lifting / lowering device 5 for loading and unloading loads on the loading platform 3 is disposed via an attachment frame 6 attached to the rear portion of the vehicle body 2. The load receiving table lifting device 5 includes a pair of left and right lifting frames 7 and a rectangular plate-shaped load receiving table 8. The load receiving table lifting device 5 further includes a pair of left and right parallel links 9. The parallel link 9 has a maximum ascending position (indicated by a one-dot chain line in FIG. 1) where the load receiving platform 8 is substantially at the same height as the upper surface of the load receiving platform 3 while the pair of left and right lifting frames 7 are kept in a fixed posture. It is possible to move up and down between the lowest position 8 (shown by a two-dot chain line in FIG. 1) in which 8 is grounded. A hollow reinforcing support member 10 for reinforcing the load receiving table 8 is fixed to the rear surface of the load receiving table 8 in a pair of left and right.

  The load receiving table lifting device 5 includes a lifting cylinder (lift cylinder) 11. The lifting cylinder 11 is an actuator for driving the lifting frame 7 to move up and down. The lifting cylinder 11 is arranged between each parallel link 9 and the mounting frame 6. A base frame 12 of a load receiving platform 8 is pivotally supported on each of the left and right lifting frames 7, and the load receiving platform 8 is placed at a standing storage position (shown by a solid line in FIG. 1) and substantially the same height as the upper surface of the loading platform 3. It can be rotated between a horizontal overhanging position (shown by a one-dot chain line in FIG. 1).

  The load receiving table lifting device 5 includes a hoisting cylinder (tilt cylinder) 13. The hoisting cylinder 13 is an actuator for hoisting the load receiving table 8. The hoisting cylinder 13 is disposed between a support bracket (not shown) fixed to the back surface of the load receiving platform 8 and the elevating frame 7. By extending the hoisting cylinder 13, the load receiving base 8 can be raised.

  The load receiving table lifting device 5 includes a cross member 14. The cross member 14 extends in the vehicle width direction, which is a direction orthogonal to the vehicle front-rear direction, as a longitudinal direction, and is disposed on the rear lower surface of the vehicle body 2. The cross member 14 includes a bottom wall 14A, a top wall 14B, and side walls 14C and 14D, and is formed in a hollow cross-sectional rectangular shape whose one end in the longitudinal direction is closed. A middle portion in the longitudinal direction of the top wall 14B of the cross member 14 is fixed (for example, welded) to the lower surface of the rear portion of the vehicle body 2. The other end in the longitudinal direction of the cross member 14 is an open insertion port 14E. Each mounting frame 6 is formed with an insertion opening 6a. The portions near the ends of the cross member 14 in the longitudinal direction are inserted into the insertion openings 6a. The portions near the ends of the cross member 14 in the longitudinal direction are inserted into the insertion openings 6a. The cross member 14 and each attachment frame 6 are fixed (for example, welded) in the inserted state.

  As shown in FIG. 2, the power unit 15 includes a power unit main body 16, a base 17 to which the power unit main body 16 is attached, a valve block 23, an oil tank 24, and a pump 25 that are a part of the configuration of the power unit main body 16. A holding member 18 to be held, a portal cover 19 that prevents interference between the cross member 14 and the power unit main body 16, a vibration isolating rubber 20 that protects the power unit main body 16 from vibration (see FIG. 3), an electrical wiring 21, and hydraulic pressure And a pipe 22. When the power unit 15 is housed in the cross member 14, the portal cover 19 guides part of the power unit external hydraulic piping L1 and the power unit external electrical wiring L2, so that the piping wiring shown in FIGS. A support member 79 is attached via a bracket 191.

  The power unit main body 16 can be pulled out in the longitudinal direction of the cross member 14 by a predetermined amount (as will be described later, the amount pulled out until the restriction bolt B4 contacts the holding bolt B1). Can be stored in the cross member 14 by pushing. The power unit main body 16 includes the valve block 23, the oil tank 24, the pump 25, the electric motor 26, and the controller 27 in a row.

  In a state where the power unit main body 16 is housed in the cross member 14, the valve block 23, the oil tank 24, the pump 25, the electric motor 26, and the controller 27 are in this order in the insertion port 14 </ b> E side that is the drawing side end of the cross member 14. It arrange | positions on one line (straight line) so that it may follow a longitudinal direction toward an insertion side end. The pull-out side is the front side (left side in FIG. 2) C1 of the cross member 14 from which the power unit main body 16 is pulled out from the cross member 14, and the insertion side is the power unit main body 16 in the cross member 14 inserted into the cross member 14. The back side (the right side in FIG. 2) is defined as C2.

  The valve block 23 is a part that relays the flow of hydraulic oil between the oil tank 24 and the lifting cylinder 11 and the undulation cylinder 13 that are actuators. The valve block 23 includes a rectangular parallelepiped block main body portion 28 and a cylindrical block-side lid portion 29. The block main body 28 includes a needle valve for opening and closing the platform, a flow control valve for adjusting the descending speed of the load receiving platform 8, and a relief valve for adjusting the discharge pressure of the hydraulic oil. As shown in FIGS. 3 and 4, the block main body portion 28 has a drawing-side end surface (longitudinal end surface) 30 as one surface thereof, a needle valve adjusting portion 31 (two for opening and closing) as an adjusting portion, and a flow control valve. An adjustment unit 32, a relief valve adjustment unit 33, a solenoid SOLA for a descending solenoid valve, a solenoid SOLB for a undulation switching solenoid valve, and a pressure sensor 34 are provided. The solenoid SOLA and the solenoid SOLB are of a cartridge type (for example, constructed by assembling a spring, a spool, an O-ring, etc.), and are replaced when a failure occurs.

  As shown in FIG. 4, the block-side lid portion 29 is a part of the valve block 23, and thus is provided integrally with the block main body portion 28. The block-side lid portion 29 is fitted (internally fitted) to a valve-side small cross-sectional portion 35 of the oil tank 24, which will be described later, and also functions as a valve block 23 and a lid for the valve-side small cross-sectional portion 35. ing. The seal ring 36 is fitted on the outer peripheral surface of the block-side lid 29, and the sealing performance when the block-side lid 29 is fitted to the valve-side small cross-section 35 is ensured.

  A pipe connection portion is arranged on the other surface of the valve block 23, that is, the insertion side end surface 38 facing the oil tank 24 in the longitudinal direction and facing the one surface. The insertion side end surface 38 also includes the end surface of the block side lid portion 29. The insertion side end face 38 of the block main body 28 is in contact with the valve side small cross section 35.

  As shown in FIG. 5 (a), the pipe connecting portion is connected to the inlet piping 39 for connecting the inlet piping 39 for introducing the hydraulic oil from the pump 25 to the valve block 23, and from the valve block 23 to each actuator side. Derived pipe connecting portions 43 and 44 for connecting the derived pipes 41 and 42 for leading the hydraulic oil are provided.

  In this case, the introduction pipe 39 is an inner pipe inserted through the oil tank, and one end side and the other end side thereof are connected to the pump 25 and the valve block 23, respectively. The introduction pipe connecting portion 40 is an introduction side screw hole provided on the insertion side end face 38 of the valve block 23, and one end side of the introduction pipe 39 is connected to the introduction side screw hole 45 provided on the pump 25 side via an adapter 45a. The other end is connected to an introduction-side screw hole 40 provided on the end surface of the block-side lid 29 via an adapter 39a.

  The lead-out piping connection parts 43 and 44 are arranged at positions corresponding to the upper part of the insertion-side end face 38 that is removed from the oil tank 24 (above the valve-side small cross-sectional part 35 of the oil tank 24 described later). This is a lead-out side screw hole provided in the block 23. More specifically, the outlet pipe connecting portions 43 and 44 are disposed in the vicinity of the upper corner portion of the insertion side end surface 38 and in the vicinity of both ends in the width direction. One end side of the outlet pipe 41 is connected to one outlet side screw hole 43 provided on the insertion side end face 38 via an adapter 43a, and one end side of the outlet pipe 42 is the other outlet side provided on the insertion side end face 38. The screw hole 44 is connected via an adapter 44a.

  As shown in FIG. 3, groove-like recesses extending in the longitudinal direction are formed on both side surfaces in the width direction of the valve block 23. Specifically, the groove-shaped concave portion includes an upper concave portion 46 formed at a substantially central portion in the height direction on both side surfaces in the width direction, and a lower concave portion 47 formed below the upper concave portion 46. The height of the upper concave portion 46 is set higher than that of the lower concave portion 47. The lower recessed portion 47 is formed below the upper recessed portion 46 so as to be continuous with the upper recessed portion 46 and set to be deeper than the upper recessed portion 46. In other words, the upper concave portion 46 and the lower concave portion 47 are formed so as to be continuous vertically through the stepped surface 48 in the middle in the vertical direction.

  The oil tank 24 stores hydraulic oil supplied to the lifting and lowering cylinders 11 and 13. As shown in FIG. 2, the oil tank 24 includes a large cross section 49, the valve side small cross section 35, and a pump side small cross section 50. The large cross section 49, the valve side small cross section 35, and the pump side small cross section 50 are integrally formed of synthetic resin. The large cross section 49 is disposed in the middle in the longitudinal direction and is formed in the same cross sectional shape in the longitudinal direction. As shown in FIGS. 3 and 6, chamfers 51, 52, 53, and 54 are applied to the four corners of the large cross-section portion 49, so that the cross-sectional shape of the large cross-section portion 49 is formed in an octagonal cylindrical shape. ing. An oil supply port 55 (see FIG. 2), which is an oil pouring spout, is provided on the upper surface 49a of the large cross section 49, and the oil supply port 55 is closed by a cap 55a. A breather is provided.

  Outlet pipes 41 and 42 are arranged in the longitudinal direction of the cross member 14 along the upper chamfers 51 and 52 among the chamfers 51, 52, 53 and 54, respectively. Connected to the cylinder 13 side.

  The valve-side small cross-section portion 35 and the pump-side small cross-section portion 50 are formed to have a smaller cross section than the large cross-section portion 49 by being narrowed compared to the large cross-section portion 49. The valve side small cross section 35 is disposed on the valve block side with respect to the large cross section 49. The pump-side small cross section 50 is arranged on the pump side with respect to the large cross section 49.

  The cross-sectional shapes of the valve-side small cross-sectional portion 35 and the pump-side small cross-sectional portion 50 are substantially cylindrical. The cylinder centers of the valve-side small cross-section portion 35 and the pump-side small cross-section portion 50 are displaced in the vertical direction, for example. Since the cylinder centers of the valve-side small cross-section portion 35 and the pump-side small cross-section portion 50 are displaced in the vertical direction, the rotation of the oil tank 24 is suppressed against the force in the direction in which the oil tank 24 is rotated. The

  As shown in FIG. 6, groove-shaped concave portions 56 are formed on both side surfaces in the width direction of the large cross-section portion 49 over the longitudinal direction. The groove-shaped recess 56 is formed to be concave toward the center in the width direction (inward in the radial direction) of the oil tank 24. The groove-shaped concave portion 56 is formed by the upper wall portion 57, the lower wall portion 58, and the back wall portion 59, and has the same cross section in the longitudinal direction. The groove-shaped recess 56 is not formed in the valve-side small cross-sectional portion 35 and the pump-side small cross-sectional portion 50. The groove-like recess 56 is located at a position corresponding to the positions of the upper recess 46 and the lower recess 47 of the valve block 23, and the depth position of the inner surface 59 a of the inner wall 59 is higher than that of the upper recess 46 of the valve block 23. It is set deeper than the back surface 47 a of the deep lower recess 47. Thus, a groove-shaped concave portion of the valve block 23, which will be described later, the oil tank 24, and the holding member 18 attached to the pump 25 in the longitudinal direction are prevented from interfering with the oil tank 24.

  The valve-side small cross-sectional portion 35 and the pump-side small cross-sectional portion 50 of the oil tank 24 have a substantially cylindrical shape and are open. Therefore, the valve-side small cross-sectional portion 35 is covered by the one side end member, and the pump-side small cross-sectional portion 50 is covered by the other side end member. One side member corresponds to the valve block 23. The member that covers the valve side small cross-sectional portion 35 is the block side lid portion 29 as described above. The other side member corresponds to the pump 25, which will be described later.

  The pump 25 sucks the hydraulic oil in the oil tank 24 and discharges the hydraulic oil to the introduction pipe 39 (valve block 23 side). As shown in FIG. 2, a gear pump is used for the pump 25. The pump 25 includes a rectangular parallelepiped pump body 60 and a cylindrical pump-side lid 61. The pump-side lid 61 is fitted (internally fitted) to the pump-side small cross-sectional portion 50 of the oil tank 24, and has a function of covering the pump-side small cross-sectional portion 50 together with the function of the pump 25. The seal ring 37 is fitted on the outer peripheral surface of the pump-side lid 61, and the sealing performance when the pump-side lid 61 is fitted to the pump-side small cross section 50 of the oil tank 24 is ensured. The drawing-side end surface 60 a of the pump main body 60 is in contact with the pump-side small cross-sectional portion 50.

  Although not shown, a plate-shaped resin pad is attached to the upper surface of the pump body 60. With this resin pad, the distance between the inner surface of the cross member 14 and the power unit 15 can be reduced. For this reason, it is possible to prevent the power unit 15 from being damaged or causing abnormal noise in the cross member 14 due to the power unit 15 moving up and down in the cross member 14 due to vibration during traveling of the lorry 1. In order to suppress the vertical movement of the power unit 15, for example, the base 17 can be sandwiched with metal fittings provided in the cross member 14. Various other means can be employed.

  The oil tank 24 is in a floating state with respect to the base 17, and as described above, the block-side lid portion 29 is fitted to the valve-side small cross-sectional portion 35, and the pump-side lid portion 61 is fitted to the oil tank 24. The oil tank 24 is temporarily held by the valve block 23 and the pump 25 by fitting to the pump side small cross section 50.

  The electric motor 26 is for driving the pump 25 and is disposed adjacent to the insertion side of the pump 25. The controller 27 controls the valve drive unit of the valve block 23 and the drive unit of the electric motor 26 and is disposed adjacent to the insertion side of the electric motor 26.

  A portal cover 19 is disposed near the insertion side of the controller 27. As shown in FIGS. 2 and 7, the portal cover 19 includes a pair of side wall parts 63 fixed to a side guard 62 of the base 17, which will be described later, and a top wall that connects both side wall parts 63 in the width direction at the upper end parts thereof. A wall 64. The side wall portion 63 extends in the vertical direction from the inner surface of the side guard 62 and is bent toward the center in the width direction at the upper portion thereof. The top wall portion 64 is arranged along the width direction. The height position of the top wall 64 is set higher than other members constituting the power unit main body 16. With such a structure of the portal cover 19, when the power unit 15 is pulled out in the longitudinal direction of the cross member 14, the power unit 15 can be prevented from interfering with the inner wall surface of the cross member 14, and the power unit 15 can be protected.

  As shown in FIGS. 3 and 6, the holding member 18 includes a hook-like portion 65, a cover portion 66, and a holding bolt B <b> 1. The holding members 18 are provided as a pair at least two apart from each other in the outer circumferential direction of the oil tank 24. In this case, the holding member 18 is arranged separately on one side and the other side with respect to a vertical plane P which is a predetermined reference plane including the longitudinal direction of the valve block 23, the oil tank 24, and the pump 25. Both the block 23 (one side end member) and the pump 25 (the other side end member) are configured to be held on one side and the other side of the reference surface.

  The bowl-shaped portion 65 seals the valve side small cross-sectional portion 35 which is one side opening in the longitudinal direction of the oil tank 24 with the valve block 23, and the pump 25 small cross section which is the other side opening in the longitudinal direction with the pump 25. In a state in which the portion 50 is sealed, it has a length corresponding to at least the lengths of the valve block 23, the oil tank 24, and the pump 25 in the longitudinal direction. Specifically, the bowl-shaped portion 65 is formed to have a length substantially equal to the length in the longitudinal direction of the valve block 23, the oil tank 24, and the pump 25, and the groove-shaped concave portion of the valve block 23 and the oil tank 24. It is installed over.

  The hook-shaped portion 65 is a U-shaped portion having a U-shaped cross section orthogonal to the longitudinal direction. The U-shaped part is formed to be convex toward the center in the width direction. The U-shaped portion will be described with respect to the portion corresponding to the oil tank 24. As shown in FIG. 6, the U-shaped portion includes the upper wall portion 57, the rear wall portion 59, and the lower wall portion 57 of the groove-shaped recess 56 of the oil tank 24. A top wall side holding wall portion 67, a back wall side holding wall portion 68, and a bottom wall side holding wall portion 69 that respectively face the wall portion 58 are provided. The hook-like portion 65 will be described with respect to the portion corresponding to the valve block 23. The hook-like portion 65 is integrally provided with a side surface holding wall portion 70 that faces the side surface in the width direction of the valve block 23 at a position removed from the groove-like recess. Is provided. The side surface holding wall portion 70 is integrally formed so as to extend upward from the upper end of the U-shaped top wall side holding wall portion 67.

  The cover portion 66 is a portion that covers the electrical wiring 21 for supplying power for driving the power unit 15. The cover part 66 is formed integrally with the bottom wall side holding wall part 69 of the bowl-shaped part 65. The cover part 66 is formed at the open end of the U-shaped part. Specifically, the cover portion 66 is flush with the side surface holding wall portion 70 and covers the electric wiring 21 on the outer side in the width direction, and the groove-shaped recess 56 from the lower end of the outer covering wall portion 71. And a lower covering wall portion 72 that is bent so as to face the lower wall portion 58 and covers the electric wiring 21 on the lower side thereof.

  As shown in FIG. 2, the electrical wiring 21 connects the controller 21 and the electric motor 26, the wiring 21 </ b> B connecting the controller 27 and the valve block 23, and the controller 27 and the pressure sensor 34. Wiring 21C is provided. Among these, the wiring 21B and the wiring 21C are inserted into the groove-like recesses formed in the valve block 23, the oil tank 24, and the pump 25 in the middle of the wiring (see FIG. 6).

  The valve block 23 is provided with solenoids arranged in the middle of the hydraulic circuit connecting the oil tank 24 and the raising / lowering cylinder 11 and the oil tank 24 and the raising / lowering cylinder 13. Further, an emergency switch SW that is operated in an emergency (for example, an unexpected stop of the elevating cylinder 11) is disposed at a position away from the valve block 23. The wiring 21B includes a wiring having one end connected to the controller 27 and the other end connected to each solenoid, and a wiring having one end connected to the controller 27 and the other end connected to an emergency switch. The pressure sensor 34 is provided so as to protrude from the valve block 23 toward the drawing side, and one end of the wiring 21 </ b> C is connected to the controller 27 and the other end is connected to the pressure sensor 34.

  As described above, of the electrical wiring 21, the wiring 21 </ b> B and the wiring 21 </ b> C are inserted into the groove-shaped recesses in the middle of the wiring, and between the cover portion 66 and the outer surface along the longitudinal direction of the pump main body portion 60, the cover portion 66. And the outer surface along the longitudinal direction of the oil tank 24, and the cover portion 66 and the outer surface along the longitudinal direction of the block main body portion 28 are covered with the cover portion 66. The wiring 21B and the wiring 21C are accommodated in the groove-shaped recess in a state substantially parallel to the flange 65 (U-shaped portion).

  As shown in FIG. 3, the holding bolt B <b> 1 is disposed near the drawing side end and the insertion side end when the valve block 23, the oil tank 24, and the pump 25 are combined. That is, the holding bolt B1 extends in the width direction from the rear wall side holding wall portion 68 to the block main body portion 28 at a position corresponding to the block main body portion 28 of the valve block 23 of the rear wall side holding wall portion 68 of the bowl-shaped portion 65. Are screwed together. In other words, the holding bolt B <b> 1 is arranged so as to be opposed in a straight line from both sides of the holding bolt B <b> 1 through the vertical plane P, and goes toward the center of the valve block 23 and the pump 25, respectively. Further, the holding bolt B1 extends in the width direction from the rear wall side holding wall portion 68 to the pump main body portion 60 at a position corresponding to the pump main body portion 60 of the pump 25 in the rear wall side holding wall portion 68 of the bowl-shaped portion 65. It is screwed. Such holding bolts B <b> 1 are provided for the hook-like portions 65 on both sides, and are provided as a pair spaced apart in the longitudinal direction of the block main body 28 and the pump main body 60. Note that the holding bolt B <b> 1 does not penetrate the oil tank 24.

  Thus, the holding bolt B1 corresponds to the block main body portion 28 of the valve block 23 of the rear wall side holding wall portion 68 of the bowl-shaped portion 65 in a state where the valve block 23, the oil tank 24, and the pump 25 are combined. At the position corresponding to the pump main body 60 of the pump 25, the rear wall side holding wall 68 is screwed into the block main body 28 in the width direction. The rear wall side holding wall portion 68 is screwed into the pump main body portion 60 in the width direction. As a result, the oil tank 24 is securely held by the valve block 23 and the pump 25, and the oil tank 24, the valve block 23, and the pump 25 are held evenly.

  As shown in FIG. 3, the power unit main body 16 is fixed to the base 17 and can be handled collectively. That is, the power unit main body 16 can be pulled out and inserted (stored) in the longitudinal direction with respect to the cross member 14 together with the base 17. The longitudinal direction of the base 17 coincides with the longitudinal direction of the cross member 14.

  The base 17 includes a base main body 73, a vibration-proof rubber mounting portion 74, and the side guard 62. The base main body 73 is formed as a flat plate that follows the wall surface of the bottom wall 14A of the cross member 14, and is set to a length sufficient to mount the power unit main body 16.

  The anti-vibration rubber mounting portion 74 includes a one-side mounting plate portion 75 extended so as to incline upward from one end (front end) in the width direction of the base body portion 73 and the other end in the width direction of the base body portion 73 ( And the other-side mounting plate portion 76 that is extended so as to incline upward from the rear end). The side guards 62 extend upward from the one side mounting plate portion 75 and the other side mounting plate portion 76, respectively, and are formed in a plate shape set to the same length as the base main body portion 73. The one side attachment portion 75, the other side attachment portion 76, and the side guard 62 are formed by bending the end of the base body portion.

  The anti-vibration rubber 20 is formed in a substantially rectangular parallelepiped shape, and is placed on the upper surfaces of the one side mounting plate portion 75 and the other side mounting plate portion 76 via mounting members 77 that are respectively mounted along the inclination thereof. Yes. The mounting member 77 has a predetermined length in the longitudinal direction, and the anti-vibration rubber 20 is formed in a length corresponding to the longitudinal direction of the mounting member 77. In particular, the mounting member 77 is disposed in a position corresponding to the valve block 23, the pump 25, and the electric motor 26 in the power unit main body 16. The anti-vibration rubber 20 is placed at the center in the longitudinal direction of each placement member 77.

  The anti-vibration rubber 20 is fixed to the mounting member 77 from the outside of the mounting member 77 by an inner fixing bolt B2 inserted and screwed in a direction orthogonal to the inclination direction of the mounting member 77. The front end side of the inner fixing bolt B2 is screwed into the outer periphery of the valve block 23, the pump 25, and the electric motor 26. With this configuration, the valve block 23, the pump 25, and the electric motor 26 are mounted on the mounting member. 77 and the anti-vibration rubber 20 are integrated.

  The power unit main body 16 is fixed to the base 17 via a vibration isolating rubber 20 and a mounting member 77. In particular, in the power unit main body 16, regions corresponding to the valve block 23, the pump 25, and the electric motor 26 are fixed to the base 17 via the vibration isolating rubber 20 and the mounting member 77, so that the power unit main body 16 is 17 is fixed.

  Specifically, in the region of the one side mounting plate portion 75 and the other side mounting plate portion 76 where the mounting member 77 is disposed, the outer side fixing bolt B3 is connected to the one side mounting plate portion 75 and the other side mounting plate portion 76. The mounting member 77 is fixed to the base 17 by being inserted and screwed into the mounting member 77 in a direction orthogonal to the inclination direction from the outside. The outer fixing bolt B3 is arranged on both sides in the longitudinal direction with respect to the inner fixing bolt B2 in order to avoid the inner fixing bolt B2. With such a configuration, the power unit main body 16 is securely fixed to the base 17.

  Referring to FIG. 6, one side wall of the cross member 14, in this case, the side wall 14 </ b> C on the front side of the vehicle, is brought into contact with the holding bolt B <b> 1, thereby restricting the amount of the power unit 15 pulled out from the cross member 14. The restriction bolt B4 is inserted. In this case, the holding bolt B <b> 1 is a bolt screwed into the pump main body 60 of the pump 25. The amount by which the power unit 15 is pulled out from the cross member 14, that is, the longitudinal position of the regulating bolt B4 is set so that at least the breather 55 of the oil tank 24 is exposed. That is, all the valve blocks 23 are exposed (see FIG. 5B).

  2, 5, and 7, reference numeral 78 denotes a lid. The lid 78 is a member that opens and closes the insertion port 14E of the cross member 14. The lid 78 is fixed to the end of the base 17 in the longitudinal direction. With the power unit main body 16 accommodated in the cross member 14, the insertion port 14E of the cross member 14 is closed, and the power unit main body 16 is pulled out from the cross member 14. In this state, the cross member 14 is separated from the insertion port 14E (the insertion port 14E is opened).

  In the power unit 15 configured as described above, the valve block 23 is disposed at the drawing-side end of the cross member 14. Therefore, as shown in FIG. 5B, when the power unit body 16 is pulled out in the longitudinal direction of the cross member 14 until the regulating bolt B4 comes into contact with the holding bolt B1 on the pump body 60 side, the needle valve adjustment is performed. Since the portion 31, the flow control valve adjustment portion 32, and the relief valve adjustment portion 33 are exposed from the cross member 14, these adjustments and maintenance are easy to perform.

  Further, the block main body portion 28 has a needle valve adjusting portion 31, a flow control valve adjusting portion 32, a relief valve adjusting portion 33, a solenoid SOLA for a descending solenoid valve, an undulation on a drawing side end surface (longitudinal end surface) 30 which is one surface thereof. A solenoid SOLB of the switching solenoid valve and the pressure sensor 34 are disposed, and the outlet pipe connecting portions 43 and 44 are disposed in the vicinity of the upper corner of the insertion side end surface 38 and in the vicinity of both ends in the width direction. That is, there are no outlet pipe connection parts 43 and 44 (outlet pipes 41 and 42) on the surface on which the needle valve adjustment part 31, the flow control valve adjustment part 32, the relief valve adjustment part 33 and the like are arranged. For this reason, when the power unit 15 is pulled out in the longitudinal direction of the cross member 14 and adjustment and maintenance are performed on the adjustment unit, adjustment and maintenance of the adjustment unit are further facilitated.

  Further, the needle valve adjustment unit 31, the flow control valve adjustment unit 32, the relief valve adjustment unit 33, and the like are disposed on the drawer side end surface 30 of the block main body 28. Therefore, when the power unit 15 is pulled out in the longitudinal direction of the cross member 14, it is possible to prevent the needle valve adjusting portion 31, the flow control valve adjusting portion 32, the relief valve adjusting portion 33 and the like from interfering with the cross member 14, and these adjusting portions. Can be protected.

  The lead-out pipes 41 and 42 are arranged in the longitudinal direction of the cross member 14 so as to be along the upper chamfers 51 and 52 among the chamfers 51, 52, 53 and 54 of the oil tank 24. 11 is connected to the undulation cylinder 13 side. As in this configuration, the lead-out pipes 41 and 42 are arranged along the longitudinal direction of the cross member 14 from the pipe connection part arranged at the upper part of the insertion-side end face of the block main body part 28, thereby preventing the oil tank 24. The lead-out pipes 41 and 42 can be connected to the lead-out pipe connecting portions 43 and 44 without being connected, and the lead-out pipes 41 and 42 led out from the upper part of the insertion side end face of the valve block 23 are used as they are. By making it go to the side, the outlet pipes 41 and 42 can be easily routed, and the outlet pipes 41 and 42 can be easily maintained from above.

  Furthermore, by placing the outlet pipes 41 and 42 in the space between the cross member 14 and the chamfers 51 and 52, the outlet pipes 41 and 42 are not damaged when the power unit 15 is taken in and out of the cross member 14.

  Next, the power unit external hydraulic pipe L1 and the power unit external electrical wiring L2 having one end connected to the power unit 15 and the other end connected to the lifting cylinder 11, the hoisting cylinder 13, the outer terminal box 149, the remote control box 1410, etc. To do.

  As described above, the cross member 14 is fixed to the vehicle side including the cargo receiving platform 8. The power unit 15 is a hydraulic drive source for raising and lowering the load receiving table 8 and is housed in the cross member 14 and along the cross member longitudinal direction 14L (see FIG. 8A), the cross member longitudinal direction 14L. Can be pulled out from one end side (the right end side in FIG. 8A). The power unit 15 includes a power unit side hydraulic pipe connecting portion 15J1 communicating with the hydraulic pipe 22 in the power unit 15, and an electric terminal 15J2 connected to the electric wiring 21 in the power unit 15, as shown by a broken line in FIG. The power unit external hydraulic pipe L1 is connected to the power unit side hydraulic pipe connecting portion 15J1, and as shown in FIGS. 5A and 8B, the power unit external electric line L2 is connected to the electric terminal 15J2. In addition, the electric wiring L2 outside a power unit of FIG.8 (b) is shown typically, and there exists a different part from embodiment). A flexible hose is used as the hydraulic piping L1 outside the power unit. As this hose, for example, a resin hose in which a wire is embedded can be used. Of the hydraulic power pipe L1 outside the power unit and the electrical wiring L2 outside the power unit connected to the power unit 15, portions located in the cross member 14 are shown in FIGS. 9A, 9B, and 11A, 11B. As shown (only the power unit external hydraulic pipe L1 is shown), the cross member 14 is arranged in a substantially U shape (or a substantially Ω shape).

  As shown in FIGS. 2 and 5, the power unit side hydraulic pipe connecting portion 15J1 is located above the base 17 from the other end side (the right end side in FIGS. 2 and 5 and the left end side of the power unit 15 in FIG. 8A). The power unit hydraulic pipe extending from the valve block 23 to the other side on the power unit 15 is positioned at a tip portion passing below the controller 27. As shown in FIG. 7, when the power unit 15 is viewed from the other end of the cross member 14, the lifting connection 15 </ b> J <b> 1 a located on the left side of the power unit side hydraulic piping connection 15 </ b> J <b> 1 is connected to the lifting cylinder 11. It is a hydraulic port that supplies hydraulic oil, and the undulation connection 15 </ b> J <b> 1 b located on the right side is a hydraulic port that supplies hydraulic oil to the undulation cylinder 13.

  A plurality of electrical terminals 15J2 are provided in the controller 27. As shown in FIG. 8B, for example, there are three types of electrical terminals 15J2, one connected to the outer terminal box 149, one connected to the remote control box 1410, and one connected to the ground E. Incidentally, the outer terminal box 149 is provided outside the cross member 14 as shown in FIG. 8A, and includes a terminal block for relaying the electrical wiring to the driver's seat switch and the solenoid valve for the lift cylinder 11. . Further, the remote control box 1410 is a box for pulling out the wired remote controller 1411 which is located outside the cross member 14 and operates the lifting cylinder 11 and the hoisting cylinder 13 as shown in FIG.

  The power unit side hydraulic piping connection portion 15J1 and the electric terminal 15J2 are located at the back side portion 15X in the power unit 15 (the end portion on the other end side in the cross member longitudinal direction 14L in the power unit 15). For this reason, the length of the power unit external hydraulic pipe L1 and the power unit external electric wiring L2 between the power unit 15 and the opening 141 in the cross member 14 can be shortened.

  The cross member 14 is penetrated by the hydraulic piping L1 outside the power unit and the electrical wiring L2 outside the power unit. The “penetration” includes a mode in which a hydraulic flow path and a portion (electric path) through which current passes in the electric wiring L2 outside the power unit pass through a joint or a connector. And the cross member 14 equips the vehicle front side in the cross member 14 with the opening part 141 which is substantially rectangular in a side view as shown to Fig.8 (a) and FIG.9 (b). The cross member 14 includes a box portion 142 so as to cover the opening 141 from the outside of the cross member 14. The power unit external hydraulic pipe L1 and the power unit external electrical wiring L2 are drawn out of the cross member 14 through the box 142. In addition, the power unit external hydraulic pipe L1 and the power unit external electrical wiring L2 are fixed to the box part 142 by being bound by a binding band (not shown) inside the box part 142.

  As shown in FIGS. 9A, 9B and 11A, the power unit external hydraulic pipe L1 and the power unit external electrical wiring L2 are connected to the cross member 14 in a state where the power unit 15 is housed in the cross member 14. It is arranged in a substantially U shape (or a substantially Ω shape). The “substantially U-shape” is three-dimensionally formed as shown in FIGS. The power unit external hydraulic piping L1 and the power unit external electrical wiring L2 are connected to the power unit 15 (the power unit side hydraulic piping connection portion 15J1 for the power unit external hydraulic piping L1 and the electrical terminal 15J2 on the terminal block 271 for the power unit external electrical wiring L2). From the inside of the cross member 14 to the other end side in the cross member longitudinal direction 14L (the left end side shown in FIGS. 8A, 9A, 9B, 11A, and 11B), The direction is reversed on the other end side of the member longitudinal direction 14L, and one end side of the cross member longitudinal direction 14L (the right end side shown in FIGS. 8A, 9A, 9B, 11A, and 11B). The cross member 14 extends to the outside of the cross member 14 through the opening 141 in the middle of the cross member 14 in the longitudinal direction.

  More specifically, as shown in FIGS. 9A, 9B, and 10, the power unit external hydraulic pipe L1 is formed by fixing the pipe wiring support member 79 from the power unit side hydraulic pipe connecting portion 15J1 (15J1a, 15J1b). Through the supported portion 15H, the lower end of the cross member 14L in the longitudinal direction of the cross member 14L extends to the lower left (the vehicle rear side downward), extends to the other end along the lower left corner 14Z1 of the cross member 14, and the other end On the side, when viewed from the other end side, it is inverted in a U shape toward the upper right (upward on the front side of the vehicle), and the upper right corner 14Z2 of the cross member 14 extends along the cross member longitudinal direction 14L. To the outside of the cross member 14 from the opening 141.

  Outside the cross member 14, the hydraulic piping L1 outside the power unit is connected to the lifting cylinder 11 and the raising / lowering cylinder 13, and the electric wiring L2 outside the power unit is connected to an external terminal box 149 and a remote control box 1410 provided outside the cross member 14 (FIG. 8 (a) and (b)).

  In addition, regarding the external terminal box 149, with regard to the electrical wiring between the opening 141 and the external terminal box 149, the connection portion to the terminal block provided in the external terminal box 149 is not illustrated in the external terminal box 149. Covered by a cover plate. Since the connection portion is thus covered by the cover plate, the electric wiring between the opening 141 and the outer terminal box 149 cannot be removed from the terminal block unless the cover plate is removed. For this reason, when wiring the electrical wiring from the outer terminal box 149 to the outside (see FIG. 8B), the operator accidentally removes the electrical wiring between the opening 141 and the outer terminal box 149. Therefore, efficient wiring work is possible.

  Since the power unit external hydraulic pipe L1 and the power unit external electrical wiring L2 are arranged in a substantially U shape in the cross member 14, the power unit 15 side hydraulic power pipe L1 and the power unit external electrical wiring L2 are connected to the power unit 15 side from the cross member 14. Is connected to the power unit 15 when the power unit 15 is pulled out from the cross member 14 (for example, the length L1x of the power unit external hydraulic pipe L1 is shown in FIG. 11B). It is longer than the linear distance (as an example, the linear distance L1y is shown in FIG. 11B) connecting the location and the location where the cross member 14 is pulled out.

  For this reason, as shown in FIG. 11 (b), even when the power unit 15 is pulled out from the cross member 14 to the maximum, the power unit external hydraulic pipe L1 and the power unit external electric wiring L2 are in a slack state, and are substantially U-shaped. Looseness remains. Therefore, when the power unit 15 is taken in and out, the power unit external hydraulic pipe L1 and the power unit external electric wiring L2 are not extended and no tensile force is applied, so that damage can be suppressed. When the power unit 15 is housed in the cross member 14, the power unit external hydraulic pipe L1 and the power unit external electrical wiring L2 start to bend according to the remaining “U-shape”, so that the power unit 15 starts to bend from a fully extended state. Compared to the above, the power unit 15 can be stored smoothly without being caught easily.

  Further, the power unit side hydraulic pipe connecting portion 15J1 is a hose joint formed in a substantially cylindrical shape in the back side portion 15X of the power unit 15. A hose which is a power unit external hydraulic pipe L1 is inserted and fixed to the power unit side hydraulic pipe connecting portion 15J1. The power unit side hydraulic pipe connecting portion 15J1 has an end portion that extends along the cross member longitudinal direction 14L and opens toward the other end side in the cross member longitudinal direction 14L.

  Here, when a resin hose is used as the hydraulic pipe L1, if the hose is bent excessively, the wire embedded in the hose is cut and damaged. And if it bends still more strongly, the space inside a hose will be closed and hydraulic oil will not flow, and there exists a possibility that a hose may burst by the oil pressure raised by closure. Further, when the hose is bent excessively in the vicinity of the joint to which the hose is connected, a gap is formed between the hose and the joint, resulting in oil leakage. In the present embodiment, the power unit side hydraulic pipe connecting portion 15J1 is located on the back side portion 15X of the power unit 15 and is open toward the other end side in the cross member longitudinal direction 14L. Since excessive bending is prevented, it is possible to suppress the occurrence of the above-described disadvantages.

  In the present embodiment, a plurality of power unit external hydraulic pipes L1 and power unit external electric wires L2 are bundled and arranged in the cross member 14. Specifically, the four wirings constituting the power unit external electrical wiring L2 are bundled by a corrugated tube, and are tied together with vinyl tape together with the two pipes constituting the power unit external hydraulic piping L1. For this reason, the power unit external hydraulic pipe L1 and the power unit external electric wiring L2 move in the cross member 14 in a bundled unit, so that the power unit external hydraulic pipe L1 and the power unit external electric wiring L2 are not easily entangled. For this reason, damage to the power unit external hydraulic pipe L1 and the power unit external electrical wiring L2 when the power unit 15 is taken in and out can be suppressed.

  As shown in FIGS. 9, 11, and 12, the plurality of power unit external hydraulic pipes L <b> 1 and the power unit external electrical lines L <b> 2 (hereinafter also referred to as “hydraulic pipes L <b> 1” and “electrical lines L <b> 2”) Is supported by a pipe wiring support member 79 as a juxtaposed member extending along a predetermined length with respect to the hydraulic pipe L1 and the electric wiring L2.

  The pipe wiring support member 79 includes an extension portion 791 and a support portion 792. The extension 791 is an elongated plate-like body extending along the longitudinal direction of the cross member 14, and a bracket 191 having a base end 791 a formed on the portal cover 19 as shown in FIGS. 12 (a) and 12 (b). It is fixed by bolting. Note that the shape of the extension 791 is not limited to a plate-like body, and may be various shapes as long as the shape can support the support portion 792, such as a rod-like body. Further, the extension 791 may be formed integrally with the portal cover 19. The support portion 792 is located at the tip of the extension portion 791, and is integrated with the extension portion 791 by welding in this embodiment. This support portion 792 has a plate-like body that is substantially L-shaped, and is bent at a right angle at the vertical portion 792a along the inner surface of the cross member 14 on the vehicle rear side and at the lower end of the vertical portion 792a, and is forward of the vehicle. And a lateral portion 792b extending.

  The vertical portion 792a is a portion connected to the extension portion 791, and has a pipe wiring fixing portion 792c as a guide portion, which is a portion through which a hole for attaching a lashing band passes. In the hydraulic piping L1 and the electrical wiring L2, the portion secured by the piping wiring fixing portion 792c is the supported portion 15H. As described above, the piping wiring support member 79 has a proximal end portion fixed to the power unit 15 and a distal end portion having the piping wiring fixing portion 792c. The piping wiring fixing portion 792c fixes the hydraulic piping L1 and the electric wiring L2.

  In the configuration of the present embodiment, the power unit 15 and the pipe wiring support member 79 are integrated. For this reason, as the power unit 15 is pulled out and pushed in, the piping wiring fixing portion 792c moves by the same distance as the power unit 15 has moved. That is, the supported portion 15H in the hydraulic pipe L1 and the electric wiring L2 also moves by the same distance. For this reason, when the power unit 15 is pushed in, the supported portion 15H moves horizontally to the insertion side (the other end side in the cross member longitudinal direction 14L) while maintaining a fixed positional relationship with the power unit 15 (the same applies when the power unit 15 is pulled out). Is). And since the hydraulic piping L1 and the electric wiring L2 are fixed in the supported portion 15H, when the power unit 15 is pushed, the supported portion 15H does not move in the vertical direction and the vehicle longitudinal direction. Therefore, the supported portion 15 </ b> H moves along a fixed locus as the power unit 15 moves.

  That is, the piping wiring fixing portion 792c is a part of the hydraulic piping L1 and the electrical wiring L2 that is located within a predetermined distance from the power unit side hydraulic piping connection portion 15J1 and the electrical terminal 15J2 to the insertion side (specifically, The supported portion 15H, which is located within the predetermined distance, that is the insertion-side distal end portion) functions as a guide portion that guides so as to draw a fixed locus when the power unit 15 is pushed. In the present embodiment, the “trajectory” is a horizontal linear trajectory that matches the moving direction of the power unit 15. And this piping wiring fixing | fixed part 792c (and supported part 15H) interlock | cooperates with the movement of the power unit 15. FIG. In this embodiment, this interlocking has a 1: 1 relationship with the moving distance.

  By the piping wiring fixing portion 792c functioning as a guide portion, the hydraulic piping L1 and the electrical wiring L2, which are located at a predetermined distance from the power unit side hydraulic piping connection portion 15J1 and the electrical terminal 15J2 to the insertion side, are fixed to the piping wiring. It is pushed in while being guided by the part 792c. In particular, in the present embodiment, the insertion-side tip of the one located at the predetermined distance is guided, so that when the power unit 15 is pushed, all other parts located within the predetermined distance are also guided to the insertion side. Is done. For this reason, it can suppress that a curve (deflection) arises in the hydraulic piping L1 and the electrical wiring L2 within the said predetermined distance which is not an original curve location. Accordingly, the bending portion is caught on the inner surface of the cross member 14, and the hydraulic pipe L1 and the electric wiring L2 are not easily pushed by friction between the bending portion and the inner surface of the cross member 14, thereby preventing the pushing of the power unit 15 from being inhibited. it can.

  Then, the piping wiring fixing portion 792c and the supported portion 15H move in conjunction with the pushing of the power unit 15. For this reason, in the hydraulic piping L1 and the electrical wiring L2, it is possible to suppress the length of the portion located on the insertion side from the piping wiring fixing portion 792c from increasing as the power unit 15 is pushed. Therefore, in the portion closer to the insertion side than the piping wiring fixing portion 792c, the hydraulic piping L1 and the electrical wiring L2 have a curve (deflection) other than the curve for reversal that becomes the substantially U shape (or substantially Ω shape). It is possible to suppress the occurrence, and when the power unit 15 is pushed in, the hydraulic pipe L1 and the electric wiring L2 can move freely within the cross member 14 (specifically, from the pipe wiring fixing portion 792c to the box portion 142). The end on the power unit 15 side is pushed into the insertion side. Accordingly, the “substantially U-shaped” portion of the hydraulic pipe L1 and the electric wiring L2 (particularly the inverted end of the “substantially U-shaped” portion) moves toward the insertion side, so that smooth pushing is possible. . In particular, in the present embodiment, since the interlocking is performed in a 1: 1 relationship with the movement distance, among the hydraulic piping L1 and the electrical wiring L2, in a section corresponding to the proximal end portion to the distal end portion of the piping wiring support member 79. A certain section from the power unit side hydraulic pipe connecting portion 15J1 and the electric terminal 15J2 to the pipe wiring fixing portion 792c moves the same distance as the power unit 15. For this reason, in the said area, bending does not arise in the hydraulic piping L1 and the electrical wiring L2. Therefore, since the hydraulic piping L1 and the electrical wiring L2 in the section can be moved together with the power unit 15 like the electrical wiring 21 and the hydraulic piping 22 in the power unit 15, the pushing of the power unit 15 is not hindered.

  The position of the piping wiring fixing portion 792c with respect to the hydraulic piping L1 and the electrical wiring L2 is the bending start point of the hydraulic piping L1 and the electrical wiring L2 when the power unit 15 is stored (FIG. 11A shows the bending start point L1a of the hydraulic piping L1). On the other hand, it is preferable that the position near the power unit side hydraulic pipe connection portion 15J1 of the hydraulic pipe L1 or the position near the electric terminal 15J2 of the electric wiring L2. As a result, the hydraulic pipe L1 and the electrical wiring L2 can be guided while leaving only a portion that is curved for reversal when pushing, on the power unit 15 side of the reversal portion of the hydraulic piping L1 and the electrical wiring L2. It is possible to minimize the distance at which bending can occur on the insertion side with respect to the wiring fixing portion 792c and the supported portion 15H.

  In addition, it is not preferable that the position of the piping wiring fixing portion 792c is applied to the bending of the hydraulic piping L1 and the electric wiring L2 when the power unit 15 is stored. This is because when the power unit 15 is pulled out, the piping wiring fixing portion 792c may be bent, and this bending may hinder the pushing of the power unit. Assuming that the position of the pipe wiring fixing portion 792c is a position that is substantially perpendicular to the longitudinal direction 14L of the cross member 14 with respect to the direction of the pipe wiring fixing portion 792c, the pipe wiring fixing portion 792c Bending occurs on the drawing side (one end side in the longitudinal direction of the cross member 14L), and the hydraulic piping L1 and the electric wiring L2 extend inside the cross member 14 due to their own rigidity even on the pushing side from the piping wiring fixing portion 792c. This is because an approximately S-shaped deflection occurs.

  From an economical point of view (such as a common member for covering a plurality of vehicle types), the piping wiring fixing portion 792c and the supported portion are further closer to the drawing side than immediately before the drawing side with respect to the bending start point L1a. A position of 15H can be set. This is because even if the setting is made in this manner, the hydraulic piping L1 and the electric wiring L2 themselves have rigidity, and therefore the possibility of occurrence of bending does not increase extremely.

  A preferable position of the piping wiring fixing portion 792c with respect to the hydraulic piping L1 and the electrical wiring L2 is that the power unit 15 is housed in the cross member 14, and the hydraulic piping L1 and electrical wiring from the power unit side hydraulic piping connection portion 15J1 and the electrical terminal 15J2. L2 at the reversing end (the reversing end L1b of the hydraulic pipe L1 is shown in FIGS. 9A, 9B, and 11A) from the ½ of the longitudinal distance of the cross member, , A position on the drawing side with respect to the bending start point L1a. Furthermore, it is preferable that the piping wiring fixing portion 792c is on the insertion side from the position where the hydraulic piping L1 and the electric wiring L2 are fixed to the cross member 14 (in the present embodiment, inside the box portion 142).

  By setting the piping wiring fixing portion 792c to this position, the piping wiring fixing portion 792c and the supported portion 15H are placed near the starting point (curving start point) of the curved portion of the hydraulic piping L1 and the electric wiring L2 in the storage state of the power unit 15. Can be positioned. For this reason, the hydraulic pipe L1 and the electric wiring L2 are connected to the hydraulic pipe L1 and the electric wiring L2 between the connecting portion to the power unit 15 (the power unit side hydraulic pipe connecting portion 15J1 and the electric terminal 15J2) and the curved portion. It is possible to suppress the occurrence of bending (deflection) other than for the reversal of a letter shape (or a substantially Ω-shape).

  Here, regarding the mode of the “guidance” of the hydraulic pipe L1 and the electric wiring L2, the following three patterns are conceivable from the viewpoint of the movement of the supported portion 15H relative to the movement of the power unit 15. First, as in the above-described embodiment, the power unit 15 and the supported portion 15H are interlocked so that the movement of the power unit 15 and the movement of the supported portion 15H have a 1: 1 relationship in terms of the movement distance ( Pattern of “integrated movement”. The second pattern is a pattern in which the power unit 15 and the supported portion 15H are interlocked so that the movement of the power unit 15 and the movement of the supported portion 15H do not have a 1: 1 relationship in the movement distance (“proportional movement” pattern). The “proportional” does not include a 1: 1 relationship). The third pattern is a pattern in which the power unit 15 and the supported portion 15H are not interlocked (a “relative movement” pattern).

  As a second pattern, for example, a guide member 801 extending in the longitudinal direction in the cross member 14 such as a “curtain rail” is disposed, and is movable along the guide member in the longitudinal direction. The structure which arrange | positions the slide member 802 which fixed L1 and the electrical wiring L2 can be considered (refer Fig.13 (a)). In this example, the pipe wiring fixing portion 792c (supported portion 15H) is moved to the insertion side in accordance with the pressing of the power unit 15. This movement is made by transmitting the force toward the insertion side to the hydraulic pipe L1 and the electric wiring L2, and therefore the movement distance of the pipe wiring fixing portion 792c (supported portion 15H) can be smaller than the movement distance of the power unit 15. There is sex. However, even in this example, since the supported portion 15H is guided so as to draw a constant trajectory, the occurrence of bending can be suppressed.

  As a third pattern, for example, a configuration in which a cross member support portion 81 that is fixed to the inner surface of the cross member 14 and allows the movement of the hydraulic piping L1 and the electric wiring L2 is provided (see FIG. 13B). ). As this cross member inner support part 81, the structure which has the ring-shaped part or cylindrical part which can let the hydraulic piping L1 and the electrical wiring L2 pass inside can be illustrated. In this embodiment, the movement path of the hydraulic pipe L1 and the electrical wiring L2 is restricted by the support member 81 in the cross member, particularly in the direction (longitudinal direction and vertical direction) intersecting the longitudinal direction of the cross member 14. For this reason, the support member 81 in the cross member functions as a guide portion that guides the one located in a region within a predetermined distance from the power unit side hydraulic pipe connection portion 15J1 to the insertion side to the insertion side when pushed. However, since the support member 81 in the cross member in this example is fixed to the cross member 14, it does not interlock with the power unit 15. For this reason, as the push-in progresses, the position of the supported portion 15H in the hydraulic pipe L1 and the electric wiring L2 changes every moment, and the “predetermined distance from the power unit side hydraulic pipe connection portion 15J1 to the insertion side is guided”. "Will be shortened sequentially. On the other hand, the distance that is not guided increases. For this reason, compared with the structure which the to-be-supported part 15H interlock | cooperates, possibility that a bending will arise will become high. However, even in this example, some of the hydraulic piping L1 and the electrical wiring L2 that are located within a predetermined distance are guided so as to draw a fixed locus when the power unit 15 is pushed, so that the guidance is not performed at all. Compared to a non-existing configuration, it is possible to expect relatively less deflection. The support member 81 in the cross member defines the movement path of the hydraulic pipe L1 and the electric wiring L2 when the power unit 15 is put in and out at a position away from the inner surface of the cross member 14 by a predetermined distance. It is possible to prevent the electric wiring L2 from being stretched by being in close contact with the inner surface of the cross member 14.

  The present invention can be variously modified without departing from the spirit of the present invention. In addition, the specific configuration of each part is not limited to the above embodiment.

  For example, a plurality of power unit external hydraulic pipes L1 and power unit external electric wires L2 can be combined and accommodated in a flexible tube. In this configuration, the power unit external hydraulic pipe L1 and the power unit external electrical wiring L2 can be integrated in a larger range in the longitudinal direction than in the configuration bundled by partial tying. And the load concerning the electric power line L2 outside a power unit can be reduced. This is because, when partially tied, when the power unit 15 is moved in and out, the unbound portion behaves differently and an excessive load may be applied to the bound portion.

  Further, the opening 141 can be formed at the center in the longitudinal direction of the cross member 14. In this configuration, the power unit external hydraulic piping L1 and the power unit external electrical wiring L2 taken out to the outside of the cross member 14 can be distributed to approximately the same length, so that the power unit external hydraulic piping L1 and the power unit external electrical wiring L2 can be shared. The handling work of the external power unit hydraulic pipe L1 and the external power unit wiring L2 outside the cross member 14 is also facilitated.

  Further, the power unit side hydraulic piping connection portion 15J1 and the electric terminal 15J2 are located at the drawing side end portion of the power unit, and the power unit outside hydraulic piping L1 and the power unit outside electric wiring L2 extending from the drawing side end portion are in the longitudinal direction of the power unit 15. And can be fixed by a fixture at the back end of the power unit. This fixing bracket can function as a guide portion in the embodiment. When the power unit 15 includes the pipe wiring support member 79 as in the above-described embodiment, the fixing bracket and the pipe wiring fixing portion 792c include two guide portions. As described above, the power unit 15 may be provided with a plurality of guide portions.

  Further, the power unit external hydraulic pipe L1 and the power unit external wiring L2 are viewed from the other end side of the cross member, for example, as shown in FIG. Although it is arranged over the part 14Z2), it is not limited to this. For example, it can be disposed diagonally in a symmetrical relationship with the embodiment. Further, by providing a guide member inside the cross member 14, the power unit external hydraulic pipe L1 and the power unit external electric wiring L2 can be arranged in the vertical direction.

  Further, regarding the support of the hydraulic piping L1 and the electric wiring L2 by the guide portion, the supported portion 15H is not limited to being supported in a “spot shape” by being present at one place as in the above embodiment, It can also be spread and supported “in a line”. For example, it is conceivable to form reinforcing portions for the hydraulic piping L1 and the electrical wiring L2. Specifically, the reinforcing portion includes a pipe member attached to the outer periphery in the section within the predetermined distance of the hydraulic piping L1 and the electric wiring L2, or a plurality of places along the rod-like body or plate-like body. Can be fixed to the hydraulic pipe L1 and the electric wiring L2. Furthermore, the outer peripheral surface of the pipe wiring can be cured. Thus, if it spreads over a fixed area and is supported "in a line", the rigidity of hydraulic piping L1 and electric wiring L2 will be raised. Since bending hardly occurs in the portion with increased rigidity, the bending can be effectively suppressed. In addition, this reinforcement part does not necessarily form to the root side (the power unit side hydraulic piping connection part 15J1 side), and can also be formed only in a part of the section within the predetermined distance apart from the root side.

  Furthermore, regarding the support of the hydraulic piping L1 and the electrical wiring L2 by the guide portion, in the above-described embodiment, the piping wiring fixing portion 792c as the guide portion fixes the hydraulic piping L1 and the electrical wiring L2. It is not limited to. For example, the guide portion may be configured to support the hydraulic piping L1 and the electrical wiring L2 while allowing displacement in the longitudinal direction (of the piping / wiring).

  Moreover, in the said embodiment, the part located in the cross member 14 among the power unit external hydraulic piping L1 and the power unit external electrical wiring L2 is arrange | positioned in the cross member 14 in the substantially U shape (or substantially Ω character shape). It was a thing. However, for example, only the power unit external hydraulic pipe L1 is arranged in a substantially U shape (substantially Ω shape), and the power unit external electrical wiring L2 is configured to be maintained even when the power unit 15 is taken in and out. (For example, the electrical wiring is formed into a shape that can be expanded and contracted (coil spring shape or the like), or a contact that is slidable with respect to the rail extending in the longitudinal direction is provided in the cross member 14). It does not have to be arranged in a shape (substantially Ω-shaped).

  DESCRIPTION OF SYMBOLS 1 ... Lorry car, 5 ... Cargo stand elevating device, 8 ... Cargo cradle, 11 ... Lifting cylinder, 13 ... Lifting cylinder, 14 ... Cross member, 15 ... Power unit, 141 ... Opening part, 79 ... Side member (Piping) Wiring support member), 792c ... guide part (pipe wiring fixing part), L1 ... hydraulic pipe outside power unit, L2 ... electrical wiring outside power unit

Claims (5)

A vehicle-side structural member including a load receiving table, and a cross member extending in the vehicle width direction;
A power unit that is housed in the cross member and that can be pulled out along the longitudinal direction of the cross member and that is a hydraulic drive source for raising and lowering the load receiving table;
A part of the hydraulic power piping outside the power unit and the electrical wiring outside the power unit connected to the power unit, a part of which is located in the cross member,
The power unit can be pulled out and pushed in from one end side in the longitudinal direction of the cross member,
At least the power unit external hydraulic pipe extends from the connection point to the power unit to the other end in the longitudinal direction of the cross member in a state where the power unit is housed in the cross member. Curving at the end side and reversing the direction, extending to the one end side, then penetrating the cross member and extending out of the cross member,
A guide unit that guides at least a part of the hydraulic piping outside the power unit that is located within a predetermined distance from the connection location to the other end side so as to draw a fixed locus when the power unit is pushed; Prepared ,
The guide portion is in a state in which the power unit is housed in the cross member, receiving platform that provided on the other end of the cross member longitudinally than the portion which passes through said cross member in the power unit out of the hydraulic line lift device.   2. The load receiving platform lifting / lowering device according to claim 1, wherein the guide portion guides a distal end portion on the other end side of the power unit external hydraulic piping located within the predetermined distance.   The said receiving part is a cargo receiving platform raising / lowering apparatus of Claim 1 or 2 which moves to the said other end side in response to the movement of the said power unit, when the said power unit is pushed in.   In the state where the power unit is housed in the cross member, the guide portion is more than 1/2 of the distance in the longitudinal direction of the cross member from the connection point to the power unit to the reverse end of the hydraulic piping outside the power unit. The load receiving platform elevating device according to any one of claims 1 to 3, wherein the load receiving platform elevating device is located on an end side and located closer to the one end side than a starting point of the curve. A juxtaposed member extending over a predetermined length with respect to the hydraulic piping outside the power unit,
The juxtaposed member has a proximal end fixed to the power unit, and a distal end having the guide.
The load receiving table elevating device according to any one of claims 1 to 4, wherein the guide portion fixes the power unit external hydraulic pipe.

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