JP5490520B2 - Loading platform lifting device - Google Patents

Description

  The present invention relates to a load receiving table lifting device provided at a rear portion of a load carrier of a vehicle. In particular, the present invention relates to a load receiving table lifting device that lifts and lowers a load receiving table by a hydraulic cylinder disposed in a cross member.

  Conventionally, as this kind of load receiving platform lifting device, there is known a device in which a slider is inserted into a post that is erected on both sides of the rear end of a vehicle loading platform, and the load receiving platform is supported by these sliders. (For example, refer to Patent Document 1). In the load receiving table lifting device, a hydraulic cylinder is disposed in a cross member connected between posts, and the slider and the load receiving table are lifted and lowered via a wire by an expansion and contraction operation of the hydraulic cylinder.

  Specifically, as shown in FIG. 11, the load receiving platform lifting device of Patent Document 1 includes a pair of posts 2 erected on both sides of the rear end of the vehicle loading platform 1, and is slidable within each post 2. The slider 4 inserted in the up-and-down direction via the sub-post 3 inserted in the head, the tail gate 5 as a load receiving base supported rotatably on the left and right sliders 4, and the wire 9 by the expansion and contraction of the hydraulic cylinder 6. Is fed from the cross member 22 into the post 2 or the wire 9 is pulled from the post 2 into the cross member 22 to feed the slider 4 up and down, and pressure oil is supplied to the hydraulic cylinder 6. A hydraulic power unit P is provided.

  In the load receiving device lifting device, when the rod of the hydraulic cylinder 6 is contracted, the wire 9 in the cross member 22 is fed into the post 2 and the slider 4 is lowered, and the sub post 3 and the tailgate 5 are also lowered. On the contrary, when the rod of the hydraulic cylinder 6 is extended, the wire 9 in the post 2 is drawn into the cross member 22 and the slider 4 rises, and the sub post 3 and the tailgate 5 also rise.

In the load receiving table lifting device, the wire 9 where tension is generated is elongated due to use over time, and the slider 4, the tailgate 5 and the like are displaced from their original positions. Therefore, in order to correct the position of the tailgate 5 and the like, the end position of the wire 9 is adjusted. Positioning of the wire opens the rear opening (not shown) of the cross member 22 by removing the rear part of the cover plate 7a of the cross member 22, the operator spanner installed wire adjusting mechanism at an end of the wire 9 It is performed by operating using tools, such as.

  By the way, in the above-described load receiving platform elevating device, the hydraulic power unit P is mounted below the left rear portion of the vehicle loading platform 1, but when the hydraulic power unit is mounted on the vehicle in this way, a part of the loading platform 1 is cut off. In addition, it is necessary to make cans of brackets for hydraulic power units, and much time and labor must be spent on the bodywork.

  Therefore, the inventor of the present application has arranged the components of the hydraulic power unit in series in the vehicle width direction in order to reduce the installation time and the installation labor of the hydraulic power unit, along with the wire feeder and the hydraulic cylinder. It was decided to install in the members. The inventors of the present application decided to install a hydraulic power unit with relatively high maintenance frequency on the rear opening side of the wire feeder and the hydraulic cylinder.

JP 2005-313750 A

  However, when the hydraulic power unit is installed on the rear opening side of the wire feeder and the hydraulic cylinder, the maintenance of the wire feeder and the like (for example, the wire position adjusting operation described above) is performed from the rear opening. May interfere with work. In this case, it is necessary to release the hydraulic power unit from the cross member by temporarily releasing the hydraulic power unit from the cross member by moving the hydraulic power unit and the fixing member such as a bolt fixed to the cross member. There was a problem that a lot of time and labor had to be spent.

  The present invention has been devised in view of such problems, and a load receiving base in which a hydraulic power unit, a wire feeder and a hydraulic cylinder are installed in a cross member, and the hydraulic power unit is installed on the rear opening side from the wire feeder and the hydraulic cylinder. An object of the present invention is to provide a lifting platform lifting device that can reduce the work time and labor required for maintaining a wire feeding device and a hydraulic cylinder.

  As means for solving the above-described problems, the load receiving table lifting apparatus of the present invention is configured as follows.

A load receiving platform lifting apparatus according to the present invention includes a post erected on each side of a rear end of a vehicle loading platform, a slider provided so as to be movable up and down along the post, a load receiving platform supported by the slider, and a hydraulic pressure A wire feeding device that raises and lowers the slider by drawing a wire into or out of the post by an expansion / contraction operation of the cylinder, and a hydraulic power unit that supplies pressure oil to the hydraulic cylinder, the hydraulic cylinder, The wire feeder and the hydraulic power unit are provided in a cross member installed between the posts, and the hydraulic power unit is installed on the rear opening side of the cross member relative to the hydraulic cylinder and the wire feeder. A load receiving platform lifting device, wherein the hydraulic power unit is installed in the cross member. It was by rotating about a fulcrum, includes a hydraulic power unit rotating means for enabling out some or all of the hydraulic power unit from the rear opening of the cross member, the hydraulic power unit rotating means, the hydraulic power unit The hydraulic power unit has a configuration in which a motor, a hydraulic oil tank, a hydraulic pump, and a valve block are arranged in series, and the hydraulic power unit has a longitudinal direction in the series direction. The base plate is fixed on the base plate, and one end of the base plate is rotatably supported in a state where the hydraulic power unit is mounted on the cross member .

In the load receiving platform lifting apparatus according to the present invention, the stacking hydraulic cylinder and the hydraulic power unit are arranged in front and back so that the longitudinal direction thereof is the longitudinal direction of the cross member, and the base plate has a rod installation side in the longitudinal direction of the hydraulic cylinder. The one end portion is used.

  According to the load receiving device lifting apparatus having such a configuration, the hydraulic power unit that is obstructive when performing maintenance work of the wire feeder and the hydraulic cylinder is easily moved by rotating around a fulcrum provided in the cross member. be able to. As a result, it is possible to reduce the work time and work labor required for maintaining the wire feeder and the hydraulic cylinder.

  Further, in the load receiving platform elevating device, the hydraulic power unit rotating means has a base plate to which the hydraulic power unit is attached, and when the base plate is at a predetermined rotating position, one end is provided on the base plate. It is desirable that the portion further includes a positioning rod whose other end can be engaged with an engaging portion provided on the cross member.

  According to the load receiving platform lifting apparatus having such a configuration, by using the positioning rod, the hydraulic power unit and the base plate can be fixed at a predetermined rotational position, so that safety of maintenance work is ensured, damage to the hydraulic power unit is prevented, and the like. .

  According to the present invention, in a load receiving platform lifting apparatus in which a hydraulic power unit, a wire feeder and a hydraulic cylinder are installed in a cross member, and the hydraulic power unit is installed on the rear opening side from the wire feeder and the hydraulic cylinder, the wire feeder and hydraulic It is possible to reduce work time and work labor required for maintenance of the cylinder.

It is the perspective view which looked at the load receiving platform raising / lowering device which concerns on embodiment of this invention from the left rear of a vehicle. It is the figure which looked at various apparatus provided in the cross member and the cross member in the state which removed the cover plate which forms the rear part of a cross member from the vehicle back. It is the top view which looked at the various equipment provided in the cross member from the top. Cross members, posts, etc. are indicated by imaginary lines. It is an enlarged view of the hydraulic power unit etc. in FIG. It is an enlarged view of the hydraulic power unit etc. in FIG. It is the perspective view which looked at the load receiving device raising / lowering device which concerns on embodiment of this invention from the left rear of a vehicle, Comprising: It is a figure which shows the state which rotated the hydraulic power unit and the base plate, and was taken out from the cross member. It is AA sectional drawing of FIG. It is a hydraulic circuit diagram of the load receiving table elevating device according to the embodiment of the present invention. It is the disassembled perspective view which isolate | separated and represented the hydraulic power unit and the baseplate. It is the perspective view which looked at the hydraulic power unit from the loading platform side. For the cross member, only the bottom plate is shown. It is the perspective view which looked at the load receiving table raising / lowering device which concerns on a prior art example from the left rear of a vehicle.

  Hereinafter, a load receiving table lifting apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 5, the load receiving table lifting device according to the embodiment of the present invention includes a post 2, a sub post 3, a slider 4, a tail gate 5, a hydraulic cylinder 6, a wire feeding device 8, and wires 9 </ b> A and 9 </ b> B. The hydraulic power unit 10 is provided.

  The posts 2 are erected on both sides of the rear end of the loading platform 1 of the vehicle, and sub-posts 3 are slidably inserted into the posts 2.

  A part of the slider 4 is slidably inserted into the sub post 3, and is provided so as to move up and down along the post 2 via the sub post 3.

  The tailgate 5 is rotatably supported by the left and right sliders 4 and 4 and can be in a horizontal state or a standing storage state. The tailgate 5 is a load receiving platform for receiving a load, and is raised and lowered between the ground and the loading platform 1.

  As shown in FIG. 3, the wire feeder 8 moves the slider 4 up and down by extending the wires 9 </ b> A and 9 </ b> B into the post 2 or pulling the wires 9 </ b> A and 9 </ b> B from the post 2 by the expansion / contraction operation of the hydraulic cylinder 6. is there. This wire feeding device 8 is provided at the top of two rows of moving pulleys 81 provided at the tip of the rod of the hydraulic cylinder 6, fixed pulleys 82 and 84 provided at both ends of the cross member 7, and left and right posts 2 and 2. Fixed pulleys 83 and 85 (see FIG. 1) respectively provided, wires 9A and 9B wound around these pulleys 81 to 85, and base ends of these wires 9A and 9B are fixed in the cross member 7. Fixing portions 72 and 74 (see FIG. 7) fixed in the cross member 7 and wire adjusting mechanisms 86 provided at the base end portions of the wires 9A and 9B are provided.

  For example, as shown in FIG. 3, the wire adjustment mechanism 86 includes a bolt 861 to which a base end portion (not shown for the wire 9A) of the wire 9A is fixed, and double nuts 862 and 863. 861 is inserted into a bolt insertion hole (not shown) opened in the longitudinal direction of the cross member 7 provided in the fixing portions 72 and 74. The double nuts 862 and 863 are screwed onto male screws formed on the opposite sides of the wires 86A and 9B of the bolt 861 and are locked to the fixing portions 72 and 74. By adjusting the position of the bolt 861 by turning the double nuts 862 and 863, the end positions of the wires 9A and 9B can be adjusted in the longitudinal direction of the cross member 7.

  As shown in FIG. 3, the hydraulic cylinder 6 and the wire feeder 8 are installed on the front side in the cross member 7. Two wires 9 </ b> A and 9 </ b> B are wound around each row of the double row pulley 81 at the tip of the rod of the hydraulic cylinder 6. As shown in FIG. 7, one end of the wire 9A is fixed to a fixing portion 72 fixed to the top surface 71 in the cross member 7, and as shown in FIG. The other end is fixed to the left slider 4 via a movable pulley 81, a fixed pulley 82 provided at the left end of the cross member 7, and a fixed pulley 83 (see FIG. 1) provided at the upper portion of the left post 2. Has been.

  As shown in FIG. 7, one end of the other wire 9B is fixed to a fixing portion 74 fixed to the bottom plate 73 in the cross member 7, and as shown in FIG. The other end of the right slider 4 is passed through a pulley 81, a fixed pulley 82, a fixed pulley 84 provided at the right end of the cross member 7, and a fixed pulley 85 (see FIG. 1) provided at the upper portion of the right post 2. Is fastened.

  When the rod of the hydraulic cylinder 6 is extended, the wires 9A and 9B in the post 2 are drawn into the cross member 7, the slider 4 is raised, and the sub post 3 and the tailgate 5 are also raised at the same time. On the other hand, when the rod of the hydraulic cylinder 6 contracts, the wires 9A and 9B in the cross member 7 are fed into the post 2 and the slider 4 is lowered, and at the same time, the sub post 3 and the tail gate 5 are also lowered.

  Next, the hydraulic power unit 10 will be described. The hydraulic power unit 10 is installed in the cross member 7 together with the hydraulic cylinder 6 and the wire feeder 8. The rear part of the cross member 7 is constituted by a cover plate 7a (see FIG. 7). By removing the cover plate 7a, the rear opening of the cross member 7 appears. The hydraulic power unit 10 is connected to the hydraulic cylinder 6 and the wire feed. It is installed closer to the rear opening than the device 8.

  As shown in FIGS. 4 and 5, the hydraulic power unit 10 includes an electric motor 11, a hydraulic oil tank 12, a hydraulic pump 13, an adapter 14, a valve block 15 and the like, and corresponds to the installation space in the cross member 7. The components 11, 12, 14, and 15 are generally arranged in series in the vehicle width direction.

  The electric motor 11 is fixed to the left side surface of the adapter 14 with a bolt 143. The output shaft of the electric motor 11 passes through the adapter 14 and is connected to the input shaft of the hydraulic pump 13.

  As shown in FIG. 4, the hydraulic oil tank 12 is fixed to the right side surface of the adapter 14 with a bolt 143. The hydraulic oil supplied to the hydraulic cylinder 6 is stored in the hydraulic oil tank 12.

  The hydraulic pump 13 is fixed to the right side surface of the adapter 14 with a bolt in the hydraulic oil tank 12. A suction filter 131 is attached to the suction side of the hydraulic pump 13, and the hydraulic oil in the hydraulic oil tank 12 is sucked into the hydraulic pump 13 through the suction filter 131.

  As shown in FIG. 5, a first tube connection portion 141 and a second tube connection portion 142 are attached to the adapter 14. The first tube connecting portion 141 communicates with the discharge port of the hydraulic pump 13 through a discharge side oil passage (not shown) formed in the adapter 14. The second tube connection portion 142 communicates with the hydraulic oil tank 12 through a tank-side oil passage (not shown) formed in the adapter 14.

  The valve block 15 is provided separately from the constituent elements 11 to 14 of the hydraulic power unit 10. The valve block 15 has valves related to the operation of the hydraulic cylinder 6, and for example, as shown in FIGS. 4 and 5 and a piping diagram (FIG. 8), a valve block main body in which an oil passage is formed. 151, a solenoid valve 152 provided in the valve block main body 151, a flow control valve 153 (see FIG. 8), a check valve 157 (see FIG. 8), a relief valve 158 (see FIG. 8), and the like.

  Further, as shown in FIGS. 3 and 5, a third tube connecting portion 154, a fourth tube connecting portion 155, and a fifth tube connecting portion 156 are attached to the valve block main body 151. The third tube connection portion 154 is connected to the first tube connection portion 141 of the adapter 14 via the flexible tube 17A. The fourth tube connection portion 155 is connected to the second tube connection portion 142 of the adapter 14 via the flexible tube 17B. Further, the fifth tube connection portion 156 is connected to the hydraulic cylinder 6 via the flexible tube 17C.

  In the load receiving platform lifting apparatus configured as described above, the hydraulic oil in the hydraulic oil tank 12 is driven by driving the electric motor 11 and the hydraulic pump 13 and setting the solenoid valve 152 to the cutoff position 152a (see FIG. 8). Is sucked into the hydraulic pump 13 and supplied from the hydraulic pump 13 to the first oil passage 159a (see FIG. 8) in the valve block 15 through the flexible tube 17A. Then, the pressure oil supplied to the first oil passage 159a opens the check valve 157, and is supplied to the head side of the hydraulic cylinder 6 through the flexible tube 17C.

  As a result, the rod of the hydraulic cylinder 6 is extended, the wires 9A and 9B in the left and right posts 2 and 2 are drawn into the cross member 7, and the slider 4, the sub post 3 and the tailgate 5 are raised.

  On the other hand, when the drive of the electric motor 11 and the hydraulic pump 13 is stopped and the solenoid valve 152 is set to the communication position 152b (see FIG. 8), the head side of the hydraulic cylinder 6 and the hydraulic oil tank 12 communicate with each other. The hydraulic oil on the head side can return to the hydraulic oil tank 12. As a result, the rod of the hydraulic cylinder 6 is contracted by a load such as the tailgate 5 and a load, and the wires 9A and 9B in the cross member 7 are fed out into the left and right posts 2 and 2, and the slider 4, sub-post 3 and The tailgate 5 is lowered. Note that a flow control valve denoted by reference numeral 153 is provided to control the descending speed of the tailgate.

  Next, a structure for rotating the hydraulic power unit 10 will be described.

  The hydraulic power unit 10 is mounted on the base plate 16 as shown in FIG. The base plate 16 is continuous with a bottom plate portion 161 disposed along the bottom plate 73 in the cross member 7, a rising portion 162 rising upward from both sides of the bottom plate portion 161, and an upper end portion of the rising portion 162. A mounting seat 163 for mounting the hydraulic power unit 10 is provided. A hollow column 168 is fixed to one end portion of the base plate 16 (bottom plate portion 161) with its axis line directed vertically. Note that bolt insertion holes (not shown) are formed in the bottom plate portion 161 at intervals in the longitudinal direction of the base plate 16, and nuts 170 are welded so that female threads are continuous with the respective bolt insertion holes. The bolt insertion holes and nuts 170 are used to fix the base plate 16 in the cross member 7 with bolts 183 as shown in FIG.

  A motor bracket 181 of the electric motor 11 is attached to a mounting seat 163A, 163B provided near one end of the base plate 16 of the mounting seat 163 with a bolt 164 and a nut 166 via a vibration isolating rubber 182. Further, a leg portion 145 of the adapter 14 is attached to the mounting seats 163C and 163D provided at the intermediate portion of the base plate 16 with a bolt 164 and a nut 166 via a vibration isolating rubber 146. Further, a valve block main body 151 is attached to a mounting seat 163E that rises upward in one side portion near the other end of the base plate 16. Specifically, hexagon socket head bolts 167 and 167 are inserted into two through holes 151b formed in the valve block main body 151 and bolt insertion holes 163Ea formed at predetermined positions of the mounting seat 163E, and the tip ends of the bolts Is screwed into a nut (not shown) welded to the outlet of the bolt insertion hole 163Ea.

  The bottom plate portion 161 to which the hollow support column 168 is fixed and the bottom plate 73 (not shown in FIG. 9) of the cross member 7 are provided with bolt insertion holes (not shown) continuous with the hollow portion of the hollow support column 168. A bolt 164A, which serves as a support shaft and a fastening member, is inserted into the hollow column 168 and the bolt insertion hole from the lower part of the cross member 7, and a washer 169 is attached to the tip of the bolt 164A protruding from the upper end of the hollow column 168. 166 is tightened. In this way, the base end portion of the base plate 16 is fastened to the bottom plate 73 in the cross member 7 so as to be rotatable. The base plate 16 is configured by the bolts 164A and the hollow columns 168 with the hydraulic power unit 10 mounted thereon. As shown in FIGS. 1 and 6, the fulcrum is pivoted so that it can enter and exit from the rear opening of the cross member 7.

  Further, as shown in FIGS. 9 and 10, a holder 191 for the positioning rod 19 is provided on one side of the base plate 16 (the side on the front side of the vehicle), and the positioning rod 19 is attached to the holder 191. .

  The positioning rod 19 engages with the base plate 16 and the cross member 7 and rotates as described above when a part or all of the base plate 16 and the hydraulic power unit 10 come out of the rear opening of the cross member 7 and is in a predetermined rotation position. For example, as shown in FIGS. 9 and 10, a straight straight shaft portion 192, bent portions 193 formed at both ends of the straight shaft portion 192, and insertion of the bent portion 193 And a flange portion 194 for regulating the depth.

  The holder 191 includes a horizontal plate 191b formed on one side of the base plate 16 and an insertion hole 191a formed in the horizontal plate 191b. The horizontal plate 191b is provided integrally with the mounting seat 163 described above, but may be provided separately from the mounting seat 163.

  A case where the work of adjusting the end positions of the wires 9A and 9B is performed in the load receiving table lifting apparatus configured as described above will be described below.

  First, the cover plate 7a of the cross member 7 is removed, and the rear opening of the cross member 7 is opened as shown in FIG.

  Next, the bolt 183 (see FIG. 7) that fixes the base plate 16 and the bottom plate 73 of the cross member 7 is removed, and as shown in FIG. 6, a predetermined position where the wire adjusting mechanism 86 can be seen from the rear of the vehicle. The base plate 16 and the hydraulic power unit 10 are rotated around the fulcrum (see FIG. 9) formed by the bolt 164A and the hollow support 168.

  Next, as shown by a two-dot chain line in FIG. 10, the positioning rod 19 is taken out from the holder 191, and one bent portion 193 of the positioning rod 19 is inserted into a bolt insertion hole (engagement) provided in the bottom plate 73 of the cross member 7. The joint portion 73a is inserted (engaged), and the other bent portion 193 is inserted (engaged) into the insertion hole (engagement portion) 191a of the holder 191. Thereby, both ends of the positioning rod 19 engage with the bolt insertion hole 73a of the cross member 7 and the insertion hole 191a of the holder 191, and the rotation of the base plate 16 and the hydraulic power unit 10 is fixed at a predetermined position. By fixing the rotation of the hydraulic power unit 10 and the base plate 16 in this way, work safety is ensured. In addition, the possibility that the hydraulic power unit 10 is damaged by colliding with any obstacle is reduced.

  Next, as shown in FIG. 6, a tool such as a spanner 23 is engaged with the wire adjustment mechanism 86 that can be viewed from the rear of the vehicle, and the adjustment work of the end positions of the wires 9A and 9B is performed.

  After the adjustment work of the end positions of the wires 9A and 9B is completed, the positioning rod 19 that fixes the rotation position of the base plate 16 and the hydraulic power unit 10 is removed, and again as shown by the solid line in FIG. Store in holder 191.

  Then, the base plate 16 and the hydraulic power unit 10 are rotated and accommodated in the cross member 7. Finally, the base plate 16 and the bottom plate 73 of the cross member 7 are fixed with bolts 183, and the lid plate 7a is attached to close the rear opening of the cross member 7.

  According to the load receiving table lifting device described above, even if the wire feeder 8 and the hydraulic cylinder 6 are installed behind the hydraulic power unit 10 when viewed from the rear opening of the cross member 7, the bolt 183 is removed, the base plate 16 and The wire feeder 8 and the hydraulic cylinder 6 can be viewed from the rear opening of the cross member 7 only by rotating the hydraulic power unit 10. Compared with the labor burden for completely removing the base plate 16 and the hydraulic power unit 10 from the cross member 7, the labor burden for rotating the base plate 16 and the hydraulic power unit 10 is remarkably small. According to the apparatus, various maintenance operations (for example, the above-described wire end position adjustment operation) can be easily performed on the wire feeder 8 and the hydraulic cylinder 6.

  Moreover, since the hydraulic power unit 10 having a relatively high maintenance frequency is installed near the rear opening of the cross member 7, maintenance work of the hydraulic power unit 10 can be easily performed.

  Further, when the hydraulic power unit 10 is accommodated in the cross member 7 simply by removing the bolt 183 and rotating the hydraulic power unit 10 so as to be exposed from the cross member 7, the rear side portion that cannot be seen from the rear opening of the cross member 7. Maintenance work can be performed.

  The present invention is applicable to, for example, a load receiving table lifting device provided at the rear of a load carrier of a truck.

1 loading platform 2 post 4 slider 5 tailgate (loading platform)
6 Hydraulic cylinder 7 Cross member 8 Wire feeder 9A, 9B Wire 10 Hydraulic power unit 16 Base plate 19 Positioning rod 73a Bolt insertion hole (engagement portion provided in cross member)
191a Insertion hole (engagement part provided in base plate)
193 Bending part 168 Hollow strut 164A Bolt (fastening member)
166 Nut (fastening member)

Claims (3)

Posts erected on both sides of the rear end of the vehicle loading platform, a slider provided so as to be able to move up and down along the post, a loading platform supported by the slider, and a wire by connecting and retracting a hydraulic cylinder. A wire feed device that raises and lowers the slider by being drawn in or drawn from within the post, and a hydraulic power unit that supplies pressure oil to the hydraulic cylinder,
The hydraulic cylinder, the wire feeding device, and the hydraulic power unit are provided in a cross member installed between the posts, and the hydraulic power unit is located at a rear portion of the cross member more than the hydraulic cylinder and the wire feeding device. A receiving platform lifting device installed on the opening side,
A hydraulic power unit rotation means that allows the hydraulic power unit to be moved in and out of a rear opening of the cross member by rotating the hydraulic power unit around a fulcrum provided in the cross member;
The hydraulic power unit rotating means has a base plate to which the hydraulic power unit is attached,
The hydraulic power unit has a configuration in which a motor, a hydraulic oil tank, a hydraulic pump, and a valve block are arranged in series, and the hydraulic power unit is fixed on the base plate so that the series direction is a longitudinal direction,
The load receiving platform elevating device, wherein one end of the base plate is rotatably supported in a state where a hydraulic power unit is placed on the cross member . The load receiving table lifting device according to claim 1,
The hydraulic cylinder and the hydraulic power unit are arranged at the front and rear so that each longitudinal direction is a cross member longitudinal direction,
The said base plate is a load receiving stand raising / lowering apparatus characterized by the rod installation side being the said one end part among hydraulic cylinder longitudinal directions . The load receiving table lifting device according to claim 1 ,
When the front Symbol baseplate is at a predetermined rotational position, the engagement portion having one end disposed on said base plate, further comprise a positioning rod which becomes engageable with the engaging portion and the other end is provided on the cross member A cargo receiving platform lifting device.

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