JP6770476B2 - Vertical load receiving platform lifting device - Google Patents

Description

The present invention relates to a vertical load receiving platform lifting device, which is a type of loading platform lifting device.

One type of load receiving platform lifting device is a vertical loading platform lifting device that raises and lowers the loading platform with respect to the left and right posts fixed to the loading platform of the vehicle. In this type of load receiving platform lifting device, the loading platform is usually lifted and lowered by a hydraulic cylinder. Generally, the power unit (power unit) for driving the hydraulic cylinder is mounted on the vehicle separately from the main body, but man-hours are required to mount the main body of the load receiving platform elevating device and the power device. On the other hand, there is a case in which a power unit is housed in a cross member connecting the left and right posts, and in addition, the power unit can be rotated during maintenance so that it can be pulled out to the rear of the cross member (see Patent Document 1 and the like).

Japanese Patent No. 5490520

However, the power unit is connected to a hydraulic cylinder, a battery, or the like by a hydraulic hose, electrical wiring, or the like, and if it is moved significantly, excessive tension is applied to the hydraulic hose or the like at that time. Further, the power unit is a unit such as a hydraulic pump or a motor for driving the hydraulic pump, and has an appropriate weight. When the power unit is pulled out from the cross member, it is cantilevered by a vertical rotating shaft. Therefore, when the power unit is pulled out from the cross member for maintenance, careful work may be psychologically forced and the work efficiency may be affected.

An object of the present invention is to provide a vertical load receiving platform elevating device that can be expected to improve the efficiency of maintenance work while suppressing excessive tension from acting on a hydraulic hose or the like during maintenance of a power unit. ..

In order to achieve the above object, the present invention is a vertical load receiving platform lifting device mounted on a vehicle, the left and right posts, the left and right sliders inserted in the left and right posts, and the left and right sliders. A load receiving table connected to the above, a cross member connecting the left and right posts, a hydraulic cylinder for raising and lowering the slider, and a power device provided in the cross member for driving the hydraulic cylinder. The device includes a tank for storing the hydraulic oil for driving the hydraulic cylinder, a hydraulic pump for sucking and discharging the hydraulic oil in the tank, a motor for driving the hydraulic pump, and a valve unit for controlling the flow of the hydraulic oil. It is connected to the cross member via a rotation shaft, rotates about the rotation shaft, and can be pulled out backward from the cross member, and the rotation range of the power device in the pull-out direction is the said. The majority of the power unit is restricted by a stopper so as to stop inside the cross member when the power unit is fully pulled out, and the fuel filler port and the valve of the tank are when the power unit is fully pulled out. It is characterized in that at least one of the solenoids of the unit is configured to be pulled out to the rear of the cross member.

According to the present invention, it is expected that excessive tension acts on the hydraulic hose or the like during maintenance of the power unit, and at the same time, the efficiency of the maintenance work is improved.

It is a left side view of the rear part of the vehicle provided with the vertical load receiving stand elevating device which concerns on one Embodiment of this invention. It is a right side view of the loading platform elevating device which concerns on one Embodiment of this invention. It is a rear view of the loading platform elevating device which concerns on one Embodiment of this invention. It is a horizontal cross-sectional view by the arrow IV-IV in FIG. It is a figure corresponding to FIG. 2 and shows the state in which the load receiving table is lowered. FIG. 3 is a side sectional view taken along the line VI-VI in FIG. It is a side sectional view by arrow VII-VII in FIG. It is a top view which showed the state which pulled out the power unit to the rear of a cross member as much as possible. It is a schematic diagram which showed the path of a wire.

An embodiment of the present invention will be described below with reference to the drawings.

1. 1. Vertical load receiving platform lifting device FIG. 1 is a left side view of the rear part of a vehicle provided with the vertical loading platform lifting device according to the embodiment of the present invention. In the specification of the present application, the driver's seat side (right side in FIG. 1) of the vehicle is the front, and the loading platform side (left side in FIG. 1) is the rear. The vehicle shown in FIG. 1 has a driver's cab (not shown) provided at the front of the chassis frame (vehicle frame) 101, a loading platform 103 provided on the chassis frame 101, and a vertical loading platform mounted at the rear of the loading platform 103. It is provided with an elevating device (hereinafter, a loading platform elevating device) 100.

2 is a right side view of the load receiving platform lifting device, FIG. 3 is a rear view, FIG. 4 is a horizontal sectional view taken along the line IV-IV in FIG. 2, and FIG. 5 is a view corresponding to FIG. It is a figure which shows the lowered state. Further, FIG. 6 is a side sectional view taken along the line VI-VI in FIG. 3, and FIG. 7 is a side sectional view taken along the line VII-VII in FIG. The load receiving platform lifting device 100 includes posts 10L, 10R, subposts 20L, 20R, sliders 30L, 30R, loading platform 40, cross member 50, hydraulic cylinder 60, power unit 70, pulley 80La-80Ld, 80Ra-80Rc, and wire 90L. It has a 90R. However, in FIG. 2, the inside of the post 10R is seen through, and in FIG. 3, the inside of the cross member 50 is seen through. Further, in FIG. 3, the subposts 20L and 20R, the sliders 30L and 30R, the loading platform 40 and the wires 90L and 90R are not shown. In FIG. 4, the subposts 20L and 20R and the wire 90R are not shown. Next, each element will be described in sequence.

2. Posts The left and right posts 10L and 10R are located at both left and right ends of the rear end of the vehicle carrier 103 and extend vertically. Hollow, for example, square pipes are used for the posts 10L and 10R. The space on the front side inside the posts 10L and 10R is referred to as the front chamber 12, and the space on the rear side is referred to as the rear chamber 13. The front chamber 12 and the rear chamber 13 are separated by a partition wall 11 (FIG. 4) except for the upper part. A slit 14 (FIG. 3) extending vertically is provided on the rear wall of the rear chamber 13.

3. 3. Subposts The left and right subposts 20L and 20R (only the right subpost 20R is shown in FIGS. 2 and 5) are inserted vertically into the rear chamber 13 of the posts 10L and 10R so as to be movable in the vertical direction. Slits (not shown) are formed in the vertical direction on the rear walls of the subposts 20L and 20R so as to correspond to the slits 14 of the posts 10L and 10R. These subposts 20L and 20R are provided with rollers 22 (FIG. 2) that roll on the rear inner wall of the rear chamber 13, and the rollers 22 roll on the rear inner wall of the rear chamber 13 to roll the rear chamber 13. It is configured to move up and down smoothly inside the. A guide roller 23 (FIG. 2) whose trailing edge faces the rear chamber 13 is provided at the lower part of the front chamber 12 of the posts 10L and 10R, and the sliding operation of the subposts 20L and 20R in the vertical direction is performed by the guide roller 23. Will also be guided by.

4. Sliders The left and right sliders 30L and 30R (only the right slider 30R is shown in FIGS. 2 and 5) extend vertically, are inserted into the subposts 20L and 20R, respectively, and move up and down inside the subposts 20L and 20R. .. Rollers 31 (FIG. 2) are provided at two upper and lower positions on the sliders 30L and 30R, respectively. These rollers 31 roll on the inner walls of the subposts 20L and 20R when the sliders 30L and 30R are moved up and down. The horizontal cross section of the sliders 30L and 30R has a plate-like shape extending back and forth, and the rear part is behind the posts 10L and 10R via the slits (not shown) of the subposts 20L and 20R and the slits 14 of the posts 10L and 10R. It is protruding. A bracket 32 (FIG. 2) is provided below these protruding portions. Further, the sliders 30L and 30R are provided with wire fixing portions 33 (FIG. 2) for fixing the ends of the wires 90L and 90R so as to be located between the upper and lower rollers 31, for example.

5. Loading platform The loading platform 40 is rotatably connected to the bracket 32 of the sliders 30L and 30R via a pin 41 (FIG. 2) extending to the left and right, and moves up and down along with the sliders 30L and 30R. The loading platform 40 constitutes a rear wall (tailgate) of the loading platform 103 by standing upright when not in use (FIG. 1). On the other hand, when the cargo bed 40 is laid down horizontally, the cargo bed 40 constitutes a cargo receiving surface, and during cargo handling work, a load or a worker is placed on the cargo bed 103 to move up and down between the floor surface height and the ground height (FIGS. 2 and 2). 5).

6. Cross member The cross member 50 extends to the left and right to connect the intermediate portions of the posts 10L and 10R in the vertical direction. The cross member 50 is formed to be hollow, and its internal space communicates with at least the anterior chamber 12 of the posts 10L and 10R. When the load receiving platform lifting device 100 is mounted on the vehicle, the cross member 50 is located above the chassis frame 101 of the vehicle so that the upper surface is horizontally connected to the upper surface (floor surface) of the loading platform 103. Although not shown, the rear surface of the cross member 50 is a removable cover. Further, the cross member 50 is provided with wire fixing portions 51 and 52 (FIG. 9) for fixing the ends of the wires 90L and 90R, respectively. The cross member 50 has a trapezoidal shape when viewed in a cross section cut in a vertical plane extending in the front-rear direction, and the upper wall surface is wider on the rear side than the lower side wall surface (FIGS. 6 and 7). Therefore, the rear surface (cover (not shown) of the cross member 50 is inclined forward downward.

7. Hydraulic cylinder The hydraulic cylinder 60 is housed in the cross member 50, and in the present embodiment, the tube is fixed to the inner wall of the cross member 50 via a support member in a posture in which the rod is extended to the left. In this embodiment, the configuration in which the tube of the hydraulic cylinder 60 is arranged in the space on the right side in the cross member 50 is illustrated. The tip of the rod of the hydraulic cylinder 60 reciprocates in the central region in the left-right direction of the cross member 50 as the hydraulic cylinder 60 expands and contracts (FIGS. 3 and 4).

8. Power unit The power unit (power unit) 70 is a unit that integrates the equipment necessary to drive the hydraulic cylinder 60, and includes a tank 71, a hydraulic pump 72 (FIG. 3), a motor 73, a valve unit 74, and the like. There is. These elements of the power unit 70 are laid out side by side in the vehicle width direction, and the power unit 70 is arranged side by side with the hydraulic cylinder 60 in the space on the left side in the cross member 50.

The motor 73 is a prime mover for driving the hydraulic pump 72, and is fixed to the base plate 81. The base plate 81 is an L-shaped plate when viewed from the front-rear direction, and its horizontally extending surface is rotatably connected to the lower side wall surface of the cross member 50 via a rotating shaft 82 (FIG. 3) extending vertically. .. However, the corner of the horizontally extending surface of the base plate 81 forms a stopper 83 (FIG. 4). When the predetermined angle base plate 81 rotates, the stopper 83 hits the plate 84 (FIG. 6 or the like) supporting the fixed pulley 80Lc, and the rotation of the base plate 81 is restricted (described later). The motor 73 is fixed to the surface of the base plate 81 extending in the vertical direction with bolts or the like. The output shaft of the motor 73 is connected to the input shaft of the hydraulic pump 72 through the valve unit 74.

The valve unit 74 is a block containing valves, is connected to the hydraulic cylinder 60, the hydraulic pump 72, and the tank 71 via a hydraulic pipeline, and controls the flow of hydraulic oil in the hydraulic circuit to operate the hydraulic cylinder 60. Plays a role in controlling. The valves included in the valve unit 74 are, for example, a solenoid valve, a flow rate control valve, a relief valve, and the like (see Japanese Patent No. 5490520 and the like). The valve unit 74 is fixed to the end face of the motor 73 on one side (right side in this example) in the left-right direction with bolts or the like. In the present embodiment, the solenoid 87 of the solenoid valve is provided at a position on the rear side in the upper part of the valve unit 74. The solenoid 87 is provided so as to project from the end surface of the valve unit 74 on one side (right side in this example) in the left-right direction. Further, a leg portion 88 for grounding the power unit 70 to the lower side wall surface of the cross member 50 is provided below the valve unit 74. The leg 88 is made of, for example, a plate-shaped rubber plate or the like, and suppresses the transmission of vibration between the valve unit 74 and the cross member 50.

The tank 71 stores hydraulic oil for driving the hydraulic cylinder 60, and is fixed to the end face of the valve unit 74 on one side (right side in this example) in the left-right direction with bolts or the like. In the present embodiment, the breather 85 is provided at the highest portion of the tank 71, and the fuel filler port 86 is provided at a position rearward of the breather 85 at the upper portion.

The hydraulic pump 72 is fixed to the end surface of the valve unit 74 on one side (right side in this example) in the left-right direction inside the tank 71 with bolts or the like. A suction filter 89 (FIG. 3) is attached to the suction side of the hydraulic pump 72, and the hydraulic pump 72 sucks and discharges the hydraulic oil in the tank 71 through the suction filter 89.

FIG. 8 is a plan view showing a state in which the power unit is pulled out to the rear of the cross member as much as possible. As described above, the power unit 70 having the above configuration is connected to the cross member 50 via a rotation shaft 82 provided on one side (left side in this example) in the left-right direction. Normally, the power device 70 housed inside the cross member 50 in a posture extending in the left-right direction rotates horizontally around the rotation shaft 82, so that the power device 70 is behind the cross member 50. It is a configuration that can pull out the part on one side (right side in this example) in the left-right direction of. The rotation range of the power device 70 in the pull-out direction is limited by the stopper 83 so that the majority of the power device 70 stays inside the cross member 50 even when the power device is pulled out from the cross member 50 to the maximum. .. When the power unit 70 is pulled out to the maximum, at least one of the fuel filler port 86 of the tank 71 and the solenoid 87 of the valve unit 74 (both in the present embodiment) is pulled out to the rear of the cross member. .. In other words, at least one of the fuel filler port 86 and the solenoid 87 is laid out so that when the power unit 70 is pulled out to the maximum, at least one of them is exposed behind the cross member 50. Further, in the present embodiment, even when the power unit 70 is pulled out to the maximum, the leg portion 88 provided at the lower part of the valve unit 74 does not come off from the lower side wall surface of the cross member 50 (at least a part of the cross member 50 It stops inside).

As described above, the upper wall surface and the lower side wall surface of the cross member 50 have different widths in the front-rear direction, but the inside of the cross member 50 is a position where it overlaps the lower side wall surface of the cross member 50 in a plan view. Further, the rear side of the cross member 50 is a position on the rear side of the rear edge of the upper wall surface of the cross member 50 in a plan view.

9. Pulley Pulley 80La-80Ld guides the wire 90L, and pulley 80Ra-80Rc guides the wire 90R (described later). It is preferable to use pulleys 80La-80Ld and pulleys 80Ra-80Rc having a large diameter as long as they do not interfere with other structures. This is because the curvature of the turning portion of the wires 90L and 90R is suppressed, and the life of the wires 90L and 90R can be expected to be extended.

The pulleys 80La and 80Ra are moving pulleys (hereinafter, these two pulleys are appropriately referred to as "moving pulleys"). The moving pulleys 80La and 80Ra are rotatably attached to the rod tip of the hydraulic cylinder 60 via a bracket in a posture in which each rotation axis (may be coaxial) is extended back and forth, and are arranged so as to be overlapped back and forth in the cross member 50. Has been done. These moving pulleys 80La and 80Ra reciprocate in the left-right direction in the central region in the left-right direction of the cross member 50 as the hydraulic cylinder 60 expands and contracts. Further, each of the moving pulleys 80La and 80Ra has a plurality of wire grooves (two rows in this embodiment).

On the other hand, the pulleys 80Lb-80Ld, 80Rb and 80Rc are fixed pulleys (hereinafter, these five pulleys are appropriately referred to as "fixed pulleys"). Of these, the fixed pulleys 80Lb, 80Lc, and 80Rb are housed in the cross member 50 in a posture in which the rotation axis is extended back and forth. The fixed pulleys 80Lb and 80Rb are located at the right end of the cross member 50 and are attached to the tube of the hydraulic cylinder 60 (or the inner wall surface of the cross member 50) via a bracket. Like the moving pulleys 80La and 80Ra, these fixed pulleys 80Lb and 80Rb each have a plurality of wire grooves (two rows in this embodiment). However, a part of the fixed pulley 80Rb on the front side faces the internal space (front chamber 12) of the post 10R. On the other hand, the fixed pulley 80Lb on the rear side is offset to the hydraulic cylinder 60 side (left side) with respect to the fixed pulley 80Rb, and the whole is accommodated between the hydraulic cylinder 60 and the post 10R. The fixed pulley 80Lc is located at the left end of the cross member 50 and is attached to the inner wall surface of the cross member 50 via a bracket so that a part of the fixed pulley 80Lc faces the front chamber 12 of the post 10L. The remaining fixed pulleys 80Ld and 80Rc are located above the partition wall 11 inside the posts 10L and 10R, respectively, and are arranged so as to straddle the front chamber 12 and the rear chamber 13. Both of these fixed pulleys 80Ld and 80Rc are rotatably supported by the posts 10L and 10R in a posture in which the rotation shaft extends to the left and right.

10. Wire FIG. 9 is a schematic diagram showing a wire path. The members described in this figure are designated by the same reference numerals as those in the above drawings, and the description thereof will be omitted. The wire 90L (broken line in the figure) is hung around the moving pulley 80La and the fixed pulley 80Lb-80Ld, one end is fixed to the cross member 50 which is a stationary structure, and the other end is fixed to the wire of the left slider 30L. It is locked to the portion 33. Specifically, one end of the wire 90L is fixed to the cross member 50 via the wire fixing portion 51. Starting from the wire fixing portion 51, the wire 90L first extends to the left, and is folded back to the right through the wire groove in the rear row of the moving pulley 80La and to the left via the wire groove in the rear row of the fixed pulley 80Lb. Further, the wire 90L is folded back to the right again through the wire groove in the front row of the moving pulley 80La, and further to the left through the wire groove in the front row of the fixed pulley 80Lb. The wire 90L is then turned upward via the fixed pulley 80Lc, further hung on the fixed pulley 80Ld and turned downward, and finally the other end is locked to the wire fixing portion 33 of the slider 30R.

One wire 90R (solid line in the figure) is hung around the moving pulley 80Ra and the fixed pulleys 80Rb and 80Rc, one end of which has a fixed relationship with the cross member 50 which is a stationary structure, and the other end of the slider 30R on the right. It is locked to the wire fixing portion 33. Specifically, one end of the wire 90R is fixed to the cross member 50 via the wire fixing portion 52. Starting from the wire fixing portion 52, the wire 90R first extends to the left, and then moves to the right through the wire groove in the rear row of the moving pulley 80Ra and to the left through the wire groove in the rear row of the fixed pulley 80Rb. It is folded back to the right again through the wire groove in the front row of 80Ra. The wire 90R is then turned upward through the wire groove in the front row of the fixed pulley 80Rb, further hung on the fixed pulley 80Rc and folded downward, and finally the other end is locked to the wire fixing portion 33 of the slider 30R. The wire.

The sliders 30L and 30R and the loading platform 40 are suspended by the wires 90L and 90R in this way.

11. Operation When using the cradle lifting device 100, first unlock the cradle 40 in an upright posture as shown in FIG. 1 (not shown), and then lay the cradle 40 horizontally and deploy it as shown in FIG. To do. For example, when unloading the load of the loading platform 103, the load of the loading platform 103 is moved to the loading platform 40 with the loading platform 40 at the floor level of the loading platform 103. Then, the operating device (not shown) is appropriately operated to contract the hydraulic cylinder 60. Specifically, when the motor 73 and the hydraulic pump 72 are stopped, the solenoid valve is switched according to the operation, and the hydraulic oil is transferred from the hydraulic cylinder 60 to the tank 71 by the action of the weight of the load receiving table 40 or the like. Return. As a result, when the hydraulic cylinder 60 contracts, the moving pulleys 80La and 80Ra move toward the fixed pulleys 80Lb and 80Rb, and the wires 90L and 90R loosen. At the same time, the subposts 20L, 20R, sliders 30L, 30R and the loading platform 40 descend along the posts 10L, 10R, and after the subposts 20L, 20R reach the lower end, the loading platform along with the sliders 30L, 30R along the subposts 20L, 20R. 40 descends.

On the contrary, when loading the load on the loading platform 103, the load is placed on the loading platform 40 with the loading platform 40 at the ground level, and the operating device (not shown) is appropriately operated to extend the hydraulic cylinder 60. Specifically, the hydraulic oil in the tank 71 is supplied from the hydraulic pump 72 to the hydraulic cylinder 60 by starting the motor 73 in response to the operation to drive the hydraulic pump 72 and appropriately switching the solenoid valve. .. As a result, when the hydraulic cylinder 60 is extended, the moving pulleys 80La and 80Ra move in the direction away from the fixed pulleys 80Lb and 80Rb, and the wires 90L and 90R raise the loading platform 40 along with the sliders 30L and 30R along the subposts 20L and 20R. .. After the sliders 30L and 30R reach the upper ends of the subposts 20L and 20R, the sliders 30L and 30R and the consignment 40 rise along with the subposts 20L and 20R along the posts 10L and 10R.

When continuing the cargo handling work, the above work is repeated, and when the work is completed, the cargo cradle 40 is erected and the cargo cradle 40 is locked as shown in FIG.

12. Effect (1) According to the present embodiment, the cover (not shown) on the rear surface of the cross member 50 can be removed, and the power unit 70 can be rotated to pull out the solenoid 87 and the fuel filler port 86 to the rear of the cross member 50. .. Therefore, it is not necessary to remove the power device 70 when performing maintenance of the solenoid, refueling work, or maintenance of the power device 70 and its surrounding equipment, and the maintenance can be performed efficiently. In addition, since the rotation range of the power unit 70 is limited by the stopper 83, it is possible to physically suppress the excessive tension applied to the hydraulic hose, the electrical wiring, etc. by pulling out the power unit 70 more than necessary. .. In addition, since the majority of the power unit 70 remains inside the cross member 50 even when it is pulled out to the maximum, when the power unit is pulled out from the cross member for maintenance, be careful of workers who are concerned about the power unit 70 falling. It is possible to reduce the psychological burden of forcing a lot of work. This can be expected to improve the efficiency of maintenance work for the power unit 70 and the like.

In particular, since the upper surface of the cross member 50 constitutes an extended surface of the floor surface of the loading platform 103, it is desired that the upper wall surface of the cross member 50 is formed widely to the full width of the left and right posts 10L and 10R in the front-rear direction. Therefore, the width of the cross member 50 in the front-rear direction is larger on the upper wall surface than on the lower wall surface. Therefore, if an attempt is made to configure the power unit 70 so that it can be pulled out as a whole without considering which part of the power device 70 should be pulled out to the rear of the cross member 50, the power is combined with the width of the upper wall surface of the cross member 50. A large rotation range of the device 70 must be secured. On the other hand, since the lower side wall surface of the cross member 50 is narrow, if the power unit 70 is pulled out more than necessary, the lower side surface of the power unit 70 is hardly covered by the lower side wall surface. In the configuration in which the power device 70 is housed in the cross member 50 having such a cross-sectional shape, the physical and psychological effect of defining the rotation range of the power device 70 as described above is great.

(2) Further, the power unit 70 has a configuration in which the motor 73 is arranged closer to the rotating shaft 82 than other components such as the tank 71, the hydraulic pump 72, and the valve unit 74. By arranging the motor 73, which is the heaviest of the constituent devices of the power unit 70, near the rotating shaft 82, it is possible to reduce the moment load applied to the rotating shaft 82 that supports the power unit 70.

(3) Further, even if the power device 70 is pulled out to the maximum, the point that the leg portion 88 of the power device 70 is in a state where at least a part of the lower side wall surface of the cross member 50 is hung is also hung on the rotating shaft 82. Contributes to the reduction of moment load.

(4) In the present embodiment, the wires 90L and 90R are hung around the moving pulleys 80Ra and 80La and the fixed pulleys 80Rb and 80Lb, and the paths are folded back twice by the moving pulleys 80Ra and 80La. Therefore, the ascending / descending distance of the sliders 30L and 30R is four times the moving distance of the moving pulleys 80Ra and 80La (the expansion / contraction distance of the hydraulic cylinder 60), and the load receiving base 40 ascends / descends four times the expansion / contraction amount of the hydraulic cylinder 60. The stroke of the hydraulic cylinder 60 can be shortened while ensuring a sufficient lifting distance of the load receiving table 40. As a result, a sufficient space can be secured on the extension line of the hydraulic cylinder 60 inside the cross member 50, and the power unit 70 can be accommodated side by side with the hydraulic cylinder 60 inside the cross member 50.

(5) The fixed pulleys 80Lb and 80Rb of the present embodiment each have two rows of wire grooves, so that the thickness is increased as compared with the pulley having one row of wire grooves. If the fixed pulley 80Lb is placed coaxially with the fixed pulley 80Rb in the front-rear direction, the front chamber 12 of the post 10R is expanded back and forth so that a part of both the fixed pulley 80Lb and 80Rb can be inserted, and as a result, the posts 10L and 10R Must be thickened back and forth.

Therefore, in the present embodiment, the fixed pulley 80Lb on which the wire 90R passing through the right post 10R is not hooked is not inserted into the front chamber 12 of the post 10R but is accommodated between the rear chambers 13 of the posts 10L and 10R. And said. As a result, it is possible to suppress an increase in the thickness of the posts 10L, 10R, and thus the load receiving platform elevating device 100 in the front-rear direction. Further, the posts 10L, 10R, the cross member 50, and the like are fixed by notching the rear portion of the loading platform 103, but the notch amount of the loading platform 103 can also be suppressed by suppressing the front-rear length of the cross member 50. This point contributes to the reduction of the man-hours for mounting the load receiving platform elevating device 100 on the vehicle.

(6) The power unit 70 is located on the extension line of the central axis of the rod of the hydraulic cylinder 60, and the arrangements of the hydraulic cylinder 60 and the power unit 70 overlap in the height direction. As a result, the dimension of the cross member 50 in the height direction can be suppressed, and the ground clearance of the cross member 50 can be set to a desired height.

13. Modification example In order to obtain the above effect (2), the motor 73 is arranged closer to the rotating shaft 82 than the other components, but as long as the essential effect (1) is obtained, the motor 73 or the like is used. The layout of the components of the power unit 70 is not limited to the example described in the above embodiment. Further, although the relationship between the rotation range of the power device 70 and the legs 88 is defined in order to obtain the above effect (3), the legs are within the rotation range of the power device 70 as long as the essential effect (1) is obtained. It is not necessary to associate part 88. Similarly, the routes of the wires 90L and 90R are defined in order to obtain the above effect (4), but the routes of the wires 90L and 90R are not limited to the examples described in the above embodiment as long as the essential effect (1) is obtained. .. Further, although the layout of the fixed pulley 80Lb is defined in order to obtain the above effect (5), the layout of the fixed pulley 80Lb is not limited to the example described in the above embodiment as long as the essential effect (1) is obtained. Although the positional relationship between the hydraulic cylinder 60 and the power unit 70 is defined in order to obtain the above effect (6), the positional relationship between the hydraulic cylinder 60 and the power unit 70 will be described in the above embodiment as long as the essential effect (1) is obtained. It is not limited to the example.

Further, in the above embodiment, the example in which the stopper 83 is formed on the base plate 81 has been described, but the stopper 83 can be relocated to the power unit 70 or a component rotating with the power device 70. Further, although the plate 84 supporting the fixed pulley 80Lc is exemplified as the member to which the stopper 83 hits, the member to which the stopper 83 hits can be relocated to the cross member 50 or a component having a fixed relationship with the cross member 50. Further, although the mechanism for restraining the rotational operation of the power device 70 is not particularly described, it is desirable to provide a lock mechanism for fixing the power device 70 in a normal posture extending to the left and right. Further, a lock mechanism for fixing the power device 70 in a posture of being pulled out to the rear of the cross member 50 for maintenance or the like can be provided.

Further, the case where the wire fixing portions 51 and 52 are provided on the inner wall of the cross member 50 has been described as an example, but the wire fixing portions 51 and 52 are fixed to a stationary structure having a fixed relationship with the cross member 50. For example, it may be attached to the tube of the hydraulic cylinder 60. The sliders 30L and 30R are driven by using pulleys and wires. For example, a chain may be used instead of the wires 90L and 90R, and a sprocket may be used instead of the pulleys 80La-80Ld and 80Ra-81Rc. .. In this case, since a sprocket having a smaller diameter than the pulley can be used, the cross member 50 and the posts 10L and 10R can be slimmed down, which leads to the miniaturization of the load receiving platform elevating device 100. Further, the hydraulic cylinder 60 does not necessarily have to be provided inside the cross member 50.

Further, the case where the subposts 20L and 20R are provided has been described as an example, but when the sliders 30L and 30R can be guided from the height of the loading platform 103 to the ground level only by the posts 10L and 10R, the subposts 20L and 20R are used. It can be omitted. The configuration in which the wires 90L and 90R are folded back twice by the moving pulleys 80Ra and 80La is illustrated, but the wires 90L and 90R are folded back three times or more by the moving pulleys 80Ra and 80La within the allowable load pressure range of the hydraulic cylinder 60. Is also good. As long as the required stroke of the hydraulic cylinder 60 is simply suppressed, the larger the number of turns of the wires 90L and 90R with respect to the moving pulleys 80Ra and 80La, the more advantageous. Further, the arrangement of the pulleys 80La-80Ld, 80Ra-81Rc, the hydraulic cylinder 60, the power unit 70 and the like may be reversed left and right from the configuration described in the above embodiment. Further, the hydraulic cylinder 60 may be fixed with a rod so that the tube can move.

10L, 10R ... post, 30L, 30R ... slider, 40 ... cradle, 50 ... cross member, 60 ... hydraulic cylinder, 70 ... power unit, 71 ... tank, 72 ... hydraulic pump, 73 ... motor, 74 ... valve unit, 82 ... Rotating shaft, 83 ... Stopper, 86 ... Refueling port, 87 ... Solenoid, 100 ... Vertical load receiving platform lifting device

Claims (5)

It is a vertical load receiving platform lifting device mounted on a vehicle.
Left and right posts and
The left and right sliders inserted in the left and right posts,
The consignment stand connected to the left and right sliders,
With the cross member that connects the left and right posts,
A hydraulic cylinder that raises and lowers the slider,
Provided in the cross member and provided with a power unit for driving the hydraulic cylinder.
The power unit includes a tank for storing hydraulic oil for driving the hydraulic cylinder, a hydraulic pump for sucking and discharging the hydraulic oil in the tank, a motor for driving the hydraulic pump, and a valve unit for controlling the flow of hydraulic oil. At the same time, the cross member is connected to the cross member via a rotation shaft, rotates about the rotation shaft, and can be pulled out rearward from the cross member.
The rotation range of the power unit in the pull-out direction is limited by a stopper so that the majority of the power unit stops inside the cross member when the power unit is fully pulled out.
A vertical load receiving platform elevating device characterized in that at least one of a fuel filler port of the tank and a solenoid of the valve unit is pulled out to the rear of the cross member with the power unit pulled out to the maximum. .. The vertical type loading platform elevating device according to claim 1, wherein the power device has a configuration in which the motor is arranged closer to the rotating shaft than the tank, the hydraulic pump, and the valve unit. Loading platform lifting device. The vertical load receiving platform elevating device according to claim 1 has a leg portion for grounding the power device on the lower side wall surface of the cross member.
The rotation range of the power unit in the pull-out direction is limited by the stopper so that the legs do not come off the lower side wall surface of the cross member when the power unit is pulled out to the maximum. Vertical load receiving platform lifting device. The vertical load receiving platform elevating device according to claim 1, wherein the power unit is housed in the cross member side by side with the hydraulic cylinder. In the vertical load receiving platform elevating device according to claim 1, the cross member is characterized in that the upper wall surface is wider than the lower side wall surface and the rear surface is inclined forward toward the lower side. apparatus.

Images