JP2016002851A - Load supporting platform lifting gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a load supporting platform lifting gear that includes a flap rotatably provided at a tip part of a load supporting platform and capable of suppressing a shape change associated with a secular change.SOLUTION: A load supporting platform lifting gear, which includes a load supporting platform capable of being lifted/lowered with respect to a vehicle by lifting means, is provided with a flap that can rotate in such a manner that its width direction is set as an axial direction, at the tip part of the load supporting platform. The flap has a protrusive streak part, the longitudinal direction of which is a direction almost orthogonal to its width direction, at an end in its width direction, and has predetermined strength by virtue of the protrusive streak part.

Description

  The present invention relates to a load receiving platform of a load receiving platform lifting device mounted on a vehicle, and more particularly to a flap used as a road plate for the ground on the tip side of the load receiving platform.

  The load receiving platform lifting device is mainly mounted on the rear side of the vehicle and includes a load receiving platform capable of moving up and down. For example, as shown in FIG. 4 (a), in the load receiving platform lifting device in which the load receiving platform moves up and down along a pair of left and right support columns erected on the rear side of the vehicle loading platform, the front end portion 91a of the load receiving platform 91 is arranged in the vehicle longitudinal direction. Some are provided with a flap 92 that rotates in the X-axis direction. The flap 92 is attached to the distal end portion 91a via a shaft portion 93 whose axial direction is the width direction (Y-axis direction) of the load receiving platform 91. When the load receiving device lifting / lowering device is used, Thus, it functions as a road plate between the luggage placement surface 91b and the ground (for example, Patent Document 1). When the load receiving device elevating device is not used, the flap 92 is turned to the vehicle front side (X-axis negative direction side) and folded so as to overlap the load receiving table.

Japanese Patent No. 4420286

  Regarding the flap 92, since the folding and unfolding operations are performed by hand, the lightweight flap 92 is preferred. Therefore, the flap 92 is made of a thin plate material.

In this case, as shown in FIG. 4B, the flap 92 may be bent by an angle α due to aging. Since the flap 92 is made of a thin plate material, the flap 92 projecting from the load receiving table 91 is lowered with the end portion 910a of the leading end portion 91a of the overlapping load receiving table 91 as a fulcrum during repeated loading and unloading of a carriage or the like. The reason is that the light is refracted.
When such a change occurs, not only does the durability of the flap 92 decrease, but the flap leading end portion 92 a floats from the load receiving table 91 when the flap 92 is folded.

  In order to prevent the flap 92 from swinging while the vehicle is running, the flap tip 92a is locked by a locking member when folded, and the flap 92a is fixed relative to the load receiving base 91. However, if the flap tip 92a floats, the locking member will not reach and it will be difficult to fix.

  Further, when the vehicle is allowed to travel, the cargo receiving platform 91 is stored in the lower portion of the loading platform or is raised in the rear of the vehicle. When the flap front end 92a is lifted, the thickness of the load receiving base 92 is increased not only for the flap 92 but also for the floated flap front end 92a. Even if it is stored in the lower part of the loading platform or standing in the rear of the vehicle, it is stored or raised in a small space, so that the increase in volume may cause interference with the vehicle frame located above in the stored state, or In the standing state, there is a possibility of interfering with the packing box located in front.

  The present invention has been made in view of these points, and an object of the present invention is to provide a load receiving table lifting device provided with a flap that is rotatably provided at the tip end portion of the load receiving table and that can suppress a change in shape due to secular change. .

  In order to solve the above-mentioned problems, the present invention adopts the following means in the load receiving table lifting device.

A load receiving platform lifting apparatus provided with a load receiving platform that can be moved up and down with respect to the vehicle by an elevating means, and provided with a flap that can be rotated with its width direction as an axial direction at a tip portion of the load receiving platform, The end portion in the width direction has a protrusion having a longitudinal direction substantially perpendicular to the width direction.
The flap includes a metal plate material, and the protrusion has a configuration in which the metal plate material is bent.

Further, the distal end portion is provided with a rotating arm that rotates about the width direction as an axial direction, and the flap is supported by the rotating arm at the end portion in the width direction. You can also In addition, when the said flap is expand | deployed with respect to the said load receiving stand of a horizontal attitude | position, the said rotation arm is provided so that it may protrude from the said front-end | tip part.
Further, the flap is provided so as to overlap an upper side of a part of the tip portion when the flap is unfolded with respect to the load receiving table in a horizontal posture.

  The load receiving platform according to the load receiving platform lifting apparatus of the present invention is different from the flat plate-shaped flap in that the rotatable flap provided at the tip portion has a protrusion at the width direction end. It becomes the state in which the rib which makes the direction substantially orthogonal to a direction a longitudinal direction was provided, and can prevent the bending of a flap. That is, it is possible to prevent the flap strength from being lowered and to prevent the flap tip from floating when the flap is folded.

It is a side view of the load receiving table raising / lowering apparatus which concerns on embodiment of this invention. It is a perspective view which shows the flap provided in the goods receiving stand which concerns on embodiment of this invention. It is the top view and side view which show the flap provided in the receiving stand which concerns on embodiment of this invention. It is a perspective view which shows the flap provided in the goods receiving stand which concerns on a prior art form.

  As an example of the present invention, a load receiving table lifting apparatus 100 mounted on the rear side of a vehicle will be described with reference to the drawings.

  FIG. 1 shows a side view of the load receiving table lifting device 100. The load receiving platform lifting / lowering device 100 is configured such that the load receiving platform 2 can be lifted / lowered by the lifting / lowering means M, and the lifting / lowering means M is a column that is erected on the left and right sides at the rear end of the vehicle. 1, a cross member 3 installed on the left and right columns 1, and a hydraulic cylinder 4 accommodated in the cross member 3. The load receiving platform 2 moves up and down (arrow A1) along the support column 1 in the vertical direction. The load receiving platform 2 is provided with a flap F at the front end portion 21, and the flap F is rotatable (arrow A <b> 2) with the vehicle width direction (direction perpendicular to the paper surface) as an axial direction. In FIG. 1, the left side is the vehicle front side, and the right side in the figure is the vehicle rear side, and the cross member 3 and the hydraulic cylinder 4 both have the vehicle width direction as the longitudinal direction.

  A slider 5 that supports the load receiving platform 2 is disposed inside the support column 1, and one end of the slider 5 that is fixed to the slider 5 is extended inside the support column 1 or the cross member 3 so as to be extended as the hydraulic cylinder 4 expands and contracts. W and pulleys C11 and C21 for extending the wire W are arranged. In FIG. 1, for convenience of explanation, the slider 5, the wires, and the pulley C <b> 21 above the support 1 are shown by solid lines.

  The slider 5 is arranged in a state where the rear end portion 5 a protrudes from the rear surface of the support column 1. The load receiving platform 2 is supported on the rear end portion 5a so that the posture can be changed by rotating between the standing posture and the horizontal posture.

  The wire W is stretched inside the support column 1 and the cross member 3 in a known state. One end of the wire W is fixed to the slider 5 and is folded back below the support column 1 via a pulley C21 fixed to the upper portion of the support column 1. Further, the wires W are disposed inside the cross member 3 via pulleys C11 fixed to both ends of the cross member 3. A movable pulley (not shown) that moves the cross member 3 in the longitudinal direction is provided at the rod end of the hydraulic cylinder 4. The wire W drawn into the cross member 3 is fixed to a fixed end provided on the cross member 3 via a moving pulley. When the rod of the hydraulic cylinder 4 expands and contracts, the expansion / contraction force is transmitted to the slider 5 through the wire W, and the slider 5 moves up and down by the wire W being drawn out. Go up and down.

  The load receiving platform 2 is lifted and lowered in a horizontal posture as shown in the figure. The load receiving platform 2 is in a state of extending in the vehicle front-rear direction orthogonal to the load receiving table width direction (vehicle width direction) in the horizontal posture, and the flap F is in a deployed state toward the rear of the vehicle. .

  The flap F will be described with reference to FIG. FIG. 2A is a perspective view of the main part of the load receiving platform 2 in a horizontal posture when the folded flap F is viewed from the left front side of the vehicle, and FIG. 2B is a perspective view of the folded flap F from the vehicle rear side. FIG. 2 (c) is a perspective view of a main part of the horizontal position of the cargo receiving pedestal 2 as seen from the rear left side of the vehicle.

  The flap F is a plate-shaped member made of an aluminum alloy having a substantially rectangular shape with the vehicle width direction (Y-axis direction) as a longitudinal direction, and both end portions in the vehicle width direction are bent as shown in FIG. It will be. The bent portion is a ridge portion F1 that is in a standing state with respect to the main surface of the flap F and has a longitudinal direction in the vehicle front-rear direction (X-axis direction). An iron flap support 6 is attached to the ridge F1. Note that the main surface of the flap F indicates a surface that is used for loading and unloading a load by a cart or the like (with a load or a cart).

  The flap support portion 6 is provided at the front end portion 21 of the load receiving platform 2 so as to be rotatable about the vehicle width direction as an axial direction at a position that is inward by a predetermined distance from the end portion in the vehicle width direction (Y-axis direction). And functions as a pivot arm that pivots at a predetermined pivot radius with respect to the distal end portion 21. The flap support portion 6 has a substantially triangular shape and is supported by a support bracket 61 fixed on the load placement surface 2a of the load receiving platform 2. Further, the flap support portion 6 is adjacent to the support bracket 61 at a further inward position, and also in the vehicle longitudinal direction (X-axis direction). A mounting bracket 62 having a substantially rectangular cross section, and a rotating shaft portion 63 provided so that the mounting bracket 62 can rotate with respect to the support bracket 61 with the vehicle width direction as an axial direction. Have

  The support bracket 61 is fixed to the load placing surface 21 of the iron load receiving stand 2 by welding, and as shown in the drawing, the support bracket 61 is erected with the substantially triangular main surface facing the vehicle width direction side. . In addition, as shown in the drawing, a part of the upper surface of the tip 21 of the load receiving platform 2 is a tapered portion 21a, and the support bracket 61 is welded along the tapered portion 21a.

  The mounting bracket 62 is rotatable about the rotation shaft portion 63 on the vehicle rear side (X-axis positive direction side) by approximately 180 degrees from the folded state on the illustrated load receiving table 2. A flap F is fixed to the mounting bracket 62 by four fastening means (bolts and nuts) V. A protruding piece 62 a that protrudes toward the outside of the load receiving platform 21 is provided on the rotating tip side (X-axis negative direction side) of the mounting bracket 62. The load placing surface 2a of the load receiving platform 2 is provided with a rotating shaft portion 71 protruding vertically upward (Z-axis positive direction side) and a rotating piece 72 rotatable around the rotating shaft portion 71. The rotation of the mounting bracket 62 and the rotation of the flap F are regulated by rotating the rotating piece 72 on the overhanging piece 62a as shown in the figure.

  Since the flap F has a configuration attached to the flap support portion 6, the flap F can be rotated around the rotation shaft portion 63. Further, by the flap support portion 6, the cargo receiving platform 2 has a smooth smooth surface in the installation area S of the flap F as shown in FIG. Specifically, the flap support portion 6 is provided not on the installation area S but on the vehicle width direction (Y-axis direction) outer side with respect to the flap F. Concavities and convexities are suppressed on both sides of the surface 2a, and the loading / unloading operation of the cargo by a cart or the like is not hindered. In particular, the flap F is inclined with respect to the load placement surface 2a, which contributes to smooth loading and unloading between the flat surface (the load placement surface 2a) and the inclined surface (the flap F). Work safety can be secured. Furthermore, the back surface Fr of the flap F illustrated in FIG. 2B is also a smooth surface. Since the back surface Fr of the flap F and the load placing surface 2a of the load receiving platform 2 are smooth surfaces, an interference member (for example, the flap F) is formed between the opposing surfaces when the flap F is rotated rearward. And the like, and the flap F is not in a floating state, and is in a good unfolded state.

  When the flap F is in the unfolded state, as shown in FIG. 2C, the front end portion F2 extends to the vehicle rear side (X-axis positive direction side) from the front end portion 21 of the load receiving platform 2. As described above, the above-described protrusion F1 is provided over the entire length LF of the flap F along the vehicle front-rear direction. The flap F is fastened by the fastening means V in a state where the outer surface of the ridge F1 is in contact with the mounting bracket 62. A space having a height of about H1 is formed between the extended portion of the flap F and the ground. The rib portion F1 having the longitudinal direction in the vehicle front-rear direction has a rib function for the length LF of the flap F. Therefore, there is an effect of suppressing deformation of the flap F, in particular, deformation such as bending and refraction along the vehicle front-rear direction. Therefore, even when a cargo is loaded and unloaded between the cargo receiving platform and the ground via the flap F, the shape change due to secular change can be suppressed in the flap F, and when the flap F is folded, its tip It is also possible to prevent the portion F2 from floating with respect to the cargo receiving platform 2.

  Since the flap F has a strength capable of suppressing the shape change by the protrusion F1, the thickness of the flap F is not increased. Therefore, an increase in weight is avoided, and the simplicity of manually folding and unfolding operations is maintained. Further, as shown in the plan view of FIG. 3 (a), the flap F is provided with an overlapping portion P with respect to the front end portion 21 of the load receiving base 2 having a slanted length L1. Even if it carries out, the shape change that the site | part extended from the front-end | tip part 21 of the load receiving stand 2 in the flap F by using the vehicle rear side edge part P1 of the superimposition part P as a fulcrum can also be prevented. Therefore, by adopting a configuration in which the flap F is provided on the load receiving platform 2 in a state having the overlapping portion P, the flap F in the load receiving platform 2 is stably supported, and the flap F has a constant strength while maintaining its stability. Can also be secured.

  Furthermore, since the flap support portion 6 is provided, a high welding strength for the load receiving platform 2 can be ensured. A caster stopper CS shown in the figure is provided at the tip 21 of the load receiving table 2 in the load receiving table 2. As shown in FIG. 3B, the caster stopper CS has a known configuration in which the posture can be changed between a lying state (solid line portion) and an upright state (one-dot chain line portion). With respect to the caster stopper CS, the flap F is provided in the load receiving stand 2 in a close state separated by a distance L2 in the unfolded state as shown in FIG. When a cart or the like enters the flap F in the unfolded state as described above, a pulling force is generated on the flap support portion 6 on the vehicle rear side (X-axis positive direction side), but the support bracket 61 in the flap support portion 6 Since it is welded to the load receiving platform 2 over a length L3 that is larger than L2, the support bracket 61 is firmly welded against the pulling force. In other words, a long welding region can be secured at least outside of the support bracket 61 in the vehicle width direction without being restricted on a narrow space between the caster stopper CS and the flap F, so that the flap can be applied to the pulling force. F is stably supported by the load receiving platform 2. Therefore, the size of the L2 can be reduced and the size of the L3 can be increased. Therefore, it can be set as the structure by which the flap F was provided in the load receiving stand 2 in the state which has the said superimposition part P, and also the caster stopper CS was provided in the state adjacent to the front-end | tip part 21 of the load receiving stand 2. can do.

  Further, as shown in FIG. 3B, the flap support portion 6 that supports the flap F and functions as a rotating arm also has an effect of suppressing the shape change of the flap F in the deployed state. Specifically, the flap F is unfolded in a state where the mounting bracket 62 extends from the front end portion 21 of the cargo receiver 2 toward the vehicle rear side (X-axis positive direction) by a length L4. The mounting bracket 62 is also shaped like the longitudinal direction of the vehicle in the longitudinal direction, like the protrusion F1, and has a certain length along the same direction, and the flap F is fixed along the longitudinal direction. The mounting bracket 62 also has a function of suppressing a shape change in which the flap F bends in the vehicle front-rear direction. Furthermore, as shown in the drawing, the mounting bracket 62 abuts on the vehicle rear side end portion P1 of the overlapping portion P, so that a load when a cart or the like enters the flap F can be suppressed. Therefore, the mounting bracket 62 also has an effect as a rib in the flap F.

In addition, as described above, the configuration in which the flap F is supported by the flap support portion 6 can suppress unevenness between the flap F and the luggage placement surface 2a (see FIG. 2B). When the flap F is in the unfolded state, the tip end portion F2 does not float. Furthermore, since the unevenness is suppressed, a process of providing a cutout in the flap F is unnecessary, and the strength of the flap F can be prevented from being lowered and the inclination angle of the flap F can be suppressed.
As described above, the flap F made of a thin plate-like member can maintain a predetermined strength in order to ensure manual operability by having the protruding portion F1.

  The protruding portion F1 is configured to be bent, but a configuration in which a long bracket is separately fixed to the end of a flat plate member may be used. The long bracket is not limited to a rectangular shape, and may have a round bar shape or another cross-sectional shape. As for the fixing means, welding, fastening, or the like is used and can be set as appropriate. In addition, you may provide further the protrusion part which makes a vehicle width direction a longitudinal direction.

  The position at which the protrusion F1 is provided is not limited to the edge of the flap F in the vehicle width direction as shown in FIG. 2, and the flap may be provided at an inward position in the width direction away from the edge. Since the effect of suppressing the bending of F, in particular, the bending in the vehicle longitudinal direction, is applicable.

  The length of the ridge F1 in the vehicle longitudinal direction is preferably provided over the entire flap F in the vehicle longitudinal direction (length LF in FIG. 2C), but the vehicle longitudinal direction is the longitudinal direction. If it is the shape to make, even if it is slightly shorter than the said length LF, the shape change which the front-end | tip part F2 of the flap F floats can be suppressed. Further, the protrusion F1 is not limited to one each on the left and right (ends in the vehicle width direction), and can be appropriately set according to the desired strength of the flap F.

  Moreover, although it was set as the lightweight aluminum alloy flap F with respect to the iron receiving stand 2, it can change suitably also if it is a metal member about the combination of these materials, either a mutually different material or the same material I do not care.

  Regarding the position of the flap support portion 6, the flap support portion 6 is provided at a position inwardly away from the end portion of the load receiving table 2. However, the flap F may be further widened by being provided on the end surface of the load receiving table 2.

  Furthermore, although the load receiving platform lifting / lowering apparatus 100 is configured to include the lifting / lowering means M that lifts / lowers the load receiving platform 2 along the column 1, the load receiving platform 2 may be lifted / lowered by other lifting / lowering means. For example, it is also possible to apply a load receiving table elevating device provided with a known elevating means including an arm member that is rotated up and down with respect to the vehicle and a hydraulic cylinder that rotates the arm member up and down.

  INDUSTRIAL APPLICABILITY The present invention is a load receiving table lifting device mounted on a vehicle, and is useful for all types having a flap at the tip of the load receiving table.

DESCRIPTION OF SYMBOLS 1 Support | pillar 2 Load receiving stand 3 Cross member 4 Hydraulic cylinder 5 Slider 6 Flap support part 21 Tip part (load receiving stand)
21a Taper part (container)
61 Support Bracket 62 Mounting Bracket 63 Rotating Shaft 100 Lifting Device Lifting Device M Lifting Means F Flap F1 Projection (Flap)
F2 tip (flap)
P superimposition part

Claims (5)

A load receiving platform lifting device provided with a load receiving platform that can be moved up and down with respect to the vehicle by an elevating means, and provided with a flap that can be rotated with its width direction as an axial direction at a tip portion of the load receiving platform,
The flap has a protruding portion whose longitudinal direction is substantially perpendicular to the width direction at the end in the width direction. The flap includes a metal plate material,
The load receiving table elevating device according to claim 1, wherein the protruding portion is formed by bending the metal plate material. The tip portion is provided with a rotating arm that rotates about the width direction as an axial direction,
The load receiving platform lifting apparatus according to claim 1 or 2, wherein the flap is supported by the rotating arm at an end in the width direction. The lifting / lowering of the loading platform according to claim 3, wherein when the flap is unfolded with respect to the loading platform in a horizontal posture, the pivot arm is provided so as to protrude from the distal end portion. apparatus. The said flap is provided so that it may overlap with the upper part of a part of said front-end | tip part, when it expand | deploys with respect to the said receiving stand of a horizontal attitude | position. Loading platform lifting device.

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