JP2024079885A - Loading platform ascending/descending device - Google Patents

Abstract

To provide a loading platform ascending/descending device in which breakage of a connection member connecting a base portion loading platform and a distal end loading platform is suppressed.SOLUTION: A loading platform ascending/descending device 10 comprises a loading platform 16 and a lifting mechanism 21 which ascends/descends the loading platform 16. The loading platform 16 comprises: a base portion loading platform 41 having a base placement surface 411a on which a cargo is placed; a distal end loading platform 42 having a distal end placement surface 421a on which a cargo is placed, which can be folded back and expanded with respect to the base portion loading platform 41; a connection member 43 having one end turnably connected to a distal end portion of the base portion loading platform 41 and having the other end turnably connected to a base end of the distal end loading platform 41; and a cover member 44 which covers an exposed portion 43a of the connection member 43 exposed from a gap S between the base placement surface 411a and the distal end placement surface 421a, while the distal end loading platform 42 is expanded with respect to the base portion loading platform 41.SELECTED DRAWING: Figure 5

Description

Application for exception to loss of novelty has been filed

The present invention relates to a loading platform lifting device.

One example of a loading platform lifting device that is attached to trucks and the like and used for loading and unloading luggage is described in Patent Document 1. The loading platform lifting device in Patent Document 1 is equipped with a loading platform that is located at the rear of the truck's loading platform and can be raised and lowered between the ground and the floor of the loading platform. The loading platform has a base loading platform (table A) and a front loading platform (table B) that can be folded and unfolded relative to the base loading platform via a hinge. When the loading platform is in use, the front loading platform is unfolded relative to the base loading platform. When the loading platform is to be stored, the front loading platform is folded onto the base loading platform.

Japanese Utility Model Application Publication No. 7-2135

When the loading platform is deployed, the hinge is exposed between the top surface of the base loading platform and the top surface of the front loading platform. Therefore, when loading or moving cargo on the loading platform, the cargo may come into contact with the hinge, which may cause the hinge to be damaged.

The present invention was made in consideration of these circumstances, and aims to provide a load-receiving platform lifting device that can prevent damage to the connecting member that connects the base load-receiving platform and the front load-receiving platform.

(1) The present invention is a load receiving platform lifting device comprising: a load receiving platform; and a lifting mechanism for lifting the load receiving platform, the load receiving platform comprising: a base load receiving platform having a base loading surface on which loads are placed; a front load receiving platform having a front loading surface on which loads are placed and capable of being folded and unfolded relative to the base load receiving platform; a connecting member having one end rotatably connected to the front end of the base load receiving platform and the other end rotatably connected to the base end of the front load receiving platform; and a cover member for covering an exposed portion of the connecting member exposed from a gap between the base loading surface and the front loading surface when the front load receiving platform is unfolded relative to the base load receiving platform.

According to the present invention, when the front loading platform is deployed relative to the base loading platform, the exposed portion of the connecting member exposed from the gap between the base loading surface and the front loading surface is covered with a cover member. This makes it possible to prevent the luggage from coming into contact with the exposed portion of the connecting member when loading or moving the luggage on the loading platform, thereby making it possible to prevent the connecting member from being damaged by such contact.

(2) In the load receiving platform lifting device of (1) above, it is preferable that the base load receiving platform has a base plate whose surface is the base mounting surface, and the cover member has a first support portion that supports the base plate from the back side of the base plate while covering the exposed portion.
In this case, with the cover member covering the exposed portion of the connecting member, the base plate of the base load receiving platform is supported from the back side by the first support part of the cover member, thereby improving the strength of the load receiving platform when the front load receiving platform is deployed relative to the base load receiving platform.

(3) In the loading platform lifting device of (1) or (2) above, it is preferable that the front loading platform has a front plate whose surface is the front loading surface, and the cover member has a second support portion that supports the front plate from the back side of the front plate while covering the exposed portion.
In this case, with the cover member covering the exposed portion of the connecting member, the front plate of the front load receiving platform is supported from the back side by the second support part of the cover member, thereby further improving the strength of the load receiving platform when the front load receiving platform is deployed relative to the base load receiving platform.

The load-receiving platform lifting device of the present invention can prevent damage to the connecting member connecting the base load-receiving platform and the front load-receiving platform.

1 is a perspective view showing a rear part of a vehicle provided with a loading platform lifting device according to an embodiment of the present invention; FIG. FIG. FIG. 5 is a cross-sectional view taken along the line II in FIG. 4. 13 is a perspective view of the right connecting member and the cover member as viewed from below. FIG. FIG. 13 is a side cross-sectional view illustrating the folding and unfolding of the front load carrying platform, showing the front load carrying platform in the unfolded position. 1 is a side cross-sectional view illustrating the folding and unfolding of the front load carrying platform, showing the front load carrying platform in the middle of pivoting. FIG. FIG. 11 is a side cross-sectional view illustrating the folding and unfolding of the front load carrying platform, showing the front load carrying platform in the folded position.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[overall structure]
Fig. 1 is a perspective view showing the rear of a vehicle 1 equipped with a platform lifting device 10 according to an embodiment of the present invention. Fig. 2 is a side view of the platform lifting device 10. In the following description of this embodiment, directions such as "up", "down", "right", "left", "front", and "rear" refer to the directions shown in Fig. 1.

In Figures 1 and 2, the vehicle 1 of this embodiment is, for example, a truck, and includes a loading platform 2, a pair of side walls 3 provided on both the left and right sides of the loading platform 2, and a gate 4 provided at the rear end of the loading platform 2. The loading platform 2 has a floor surface 2a on which luggage is loaded. The space above the floor surface 2a of the loading platform 2 is used as a loading space for luggage.

The gate 4 is provided so as to be able to rotate up and down around an axis member 5 that extends in the left-right direction (vehicle width direction) at the rear end of the loading platform 2. The gate 4 can rotate up and down between an open position (position shown in FIG. 2) where it hangs down from the floor surface 2a of the loading platform 2, and a closed position (not shown) where it rises up from the floor surface 2a of the loading platform 2.

The loading platform lifting device 10 is used to load and unload cargo from the rear of the platform 2 onto the floor surface 2a of the platform 2. The loading platform lifting device 10 is equipped with a vertical lifting unit 11. In this embodiment, the lifting unit 11 is positioned on the left side behind the platform 2 in the state shown in FIG. 1. The lifting unit 11 has a pair of lifting pillars 12, a pair of inner columns 13, a pair of sliders 14, a loading platform 16, a cross member 19, a fastening mechanism 20, and a lifting mechanism 21.

The pair of lifting columns 12 are positioned at the rear of the platform 2 at a distance from each other in the left-right direction, and extend parallel to each other in the vertical direction. Each lifting column 12 is made of a hollow rectangular cylinder. A top plate 12a is fixed to the upper end of each lifting column 12, covering the upper end opening. A slit 12b extending in the vertical direction is formed in the rear wall of each lifting column 12.

An inner column 13 is provided inside each lifting support 12 so that it can rise and fall freely. Each inner column 13 is also made of a hollow rectangular cylinder that is long in the vertical direction. A slit 13b that extends in the vertical direction is formed in the rear wall of each inner column 13. A slider 14 is provided inside each inner column 13 so that it can rise and fall freely.

The rear of each slider 14 passes through each slit 13b, 12b of the inner column 13 and the lifting column 12, and protrudes behind the lifting column 12. Each slider 14 is guided by each slit 13b, 12b and can rise and fall relative to the lifting column 12 and the inner column 13. Each slider 14 is provided with a rotatable roller (not shown) that rolls along the inner surface of the inner column 13, allowing each slider 14 to rise and fall smoothly.

The cross member 19 is disposed between a pair of lifting columns 12, and almost the entire lower half of both lifting columns 12 is connected by the cross member 19. The cross member 19 is formed in a hollow rectangular box shape, and the internal space of the cross member 19 is connected to the internal space of each lifting column 12.

[Loading platform]
A bracket 15 is fixed to the rear lower end of each slider 14. A load receiving platform 16 is attached to each bracket 15 so that the load receiving platform 16 rises and falls together with the slider 14. The load receiving platform 16 includes a base load receiving platform 41, a front load receiving platform 42, and a pair of connecting members 43 (see FIG. 4). The base load receiving platform 41, the front load receiving platform 42, and the connecting members 43 are all made of a light metal such as an aluminum alloy.

Figure 3 is a side view of the load receiving platform 16. Figure 4 is a plan view of the load receiving platform 16 as viewed from above. Note that the cover member 44, which will be described later, is not shown in Figure 4. In Figures 3 and 4, the base end of the base load receiving platform 41 is supported by each bracket 15 so as to be able to rotate up and down about a pin 17, which serves as a horizontal axis extending in the left-right direction. In the state shown in Figure 3, the base load receiving platform 41 has a flat base plate 411 arranged above the base load receiving platform 41 (see also Figure 5).

The surface of the base plate 411 (the upper surface in FIG. 3) is the base placement surface 411a on which luggage is placed. A pair of cutouts 411b are formed at the tip of the base plate 411, spaced apart in the left-right direction. Each cutout 411b is formed in a concave shape in a plan view, and opens to the rear (towards the front cargo receiving platform 42).

The base end of the front cargo receiving platform 42 is connected to the tip of the base cargo receiving platform 41 via a connecting member 43. The front cargo receiving platform 42 can be folded and unfolded relative to the base cargo receiving platform 41. Details will be described later.

In this embodiment, the length dimension in the front-to-rear direction of the front receiving platform 42 is shorter than the length dimension in the front-to-rear direction of the base receiving platform 41. In addition, the width dimension in the left-to-right direction of the front receiving platform 42 is shorter than the width dimension in the left-to-right direction of the base receiving platform 41. The right side of the front receiving platform 42 is positioned to the left of the right side of the base receiving platform 41, and the left side of the front receiving platform 42 is positioned to the right of the left side of the base receiving platform 41.

In the state shown in FIG. 3, the front load receiving platform 42 has a front plate 421 (see also FIG. 5) that is disposed above the front load receiving platform 42, and an inclined plate 422 that inclines rearward and downward from the rear end edge of the front plate 421. In this embodiment, the front plate 421 and the inclined plate 422 are integrally formed by bending a single flat plate member.

The surface of the front plate 421 (the upper surface in FIG. 3) is the front loading surface 421a on which luggage is placed. In the state shown in FIG. 3, the front loading surface 421a is flush with the base loading surface 411a. A pair of notches 421b are formed at the base end of the front plate 421 at positions corresponding to the pair of notches 411b of the base plate 411. Each notch 421b is formed in a concave shape in a plan view and opens forward (towards the base cargo receiving platform 41).

The inclined plate 422 reduces the difference in level between the front loading surface 421a and the ground when the loading platform 16 is in the lowered position described below. This allows, for example, a cart with casters (luggage) to be loaded and unloaded smoothly between the ground and the front loading surface 421a.

Block-shaped gripping members 45 that can be gripped by the fingers of an operator are fixed to the left and right sides of the front load receiving platform 42. By gripping the gripping members 45, an operator can manually rotate the front load receiving platform 42 relative to the base load receiving platform 41 between a folded position and an unfolded position, which will be described later. A cushion rubber 46 is provided on the back side of the tip of the front load receiving platform 42, which comes into contact with the ground when the load receiving platform 16 is lowered to the lowered position.

Figure 5 is a cross-sectional view taken along the line I-I in Figure 4. In Figures 4 and 5, a pair of connecting members 43 are members that connect the tip end of the base receiving platform 41 and the base end of the front receiving platform 42. In a plan view, each connecting member 43 is disposed between each notch 411b of the base receiving platform 41 and each corresponding notch 421b of the front receiving platform 42.

One end of each connecting member 43 is rotatably connected to the tip of the base load receiving platform 41 via a base shaft 413. The base shaft 413 is formed, for example, in a cylindrical shape and extends over the entire length in the left-right direction within the tip of the base load receiving platform 41. Both axial ends of the base shaft 413 are fixed to both left and right sides of the base load receiving platform 41.

The other end of each connecting member 43 is rotatably connected to the base end of the front load receiving platform 42 via a front shaft 423. The front shaft 423 is formed, for example, in a cylindrical shape and extends over the entire length in the left-right direction within the base end of the front load receiving platform 42. Both axial ends of the front shaft 423 are fixed to both left and right sides of the front load receiving platform 42.

In the state shown in FIG. 4, a gap S is formed between the base loading surface 411a and the front loading surface 421a. This gap S is wider in the front-rear direction between each notch 411b of the base load receiving platform 41 and each corresponding notch 421b of the front load receiving platform 42, and each connecting member 43 is entirely disposed in this wider position. Therefore, in the plan view of FIG. 4, the entire portion of each connecting member 43 visible from above is the exposed portion 43a exposed from the gap S.

[Cover member]
As shown in Fig. 5, the load receiving platform 16 further includes a pair of cover members 44 that respectively cover the exposed portions 43a of the pair of connecting members 43 (see also Fig. 1). Fig. 6 is a perspective view of the right connecting member 43 and the cover member 44 as viewed from below. In Figs. 5 and 6, the cover member 44 is made of a member (e.g., a member made of steel or resin) that is stronger than the base load receiving platform 41, the front load receiving platform 42, and the connecting members 43.

The cover member 44 includes a cover body 441 and multiple (four in FIG. 6) reinforcing members 445 that reinforce the cover body 441. The cover body 441 is formed by bending downward both the left and right ends of a flat plate member, and has a flat plate portion 442 and a pair of left and right bent portions 443.

In the state shown in FIG. 5, the flat plate portion 442 is disposed below the gap S and above the connecting member 43. The flat plate portion 442 is formed to be longer in the left-right direction and in the front-rear direction than the connecting member 43, and covers the entire exposed portion 43a of the connecting member 43.

When the flat plate portion 442 covers the exposed portion 43a of the connecting member 43, the front end 442a of the flat plate portion 442 is disposed below the base plate 411, and the rear end 442b of the flat plate portion 442 is disposed below the tip plate 421. As a result, the one end 442a of the flat plate portion 442 functions as a first support portion that supports the base plate 411 from the back surface side. Similarly, the other end 442b of the flat plate portion 442 functions as a second support portion that supports the tip plate 421 from the back surface side.

A pair of bent portions 443 of the cover body 441 are disposed on both the left and right sides of the connecting member 43. The base shaft 413 penetrates the front side of each bent portion 443, and the front side of each bent portion 443 is supported rotatably relative to the base shaft 413. The tip shaft 423 penetrates the rear side of each bent portion 443, and the rear side of each bent portion 443 is supported rotatably relative to the tip shaft 423.

The multiple reinforcing members 445 are arranged at four locations on the front, back, left and right sides below the flat plate portion 442. The pair of left and right reinforcing members 445 on the front side and the pair of left and right reinforcing members 445 on the rear side are arranged with the connecting member 43 in between. Each reinforcing member 445 is formed by bending a flat plate member into a roughly L-shape, and has a first reinforcing member 446 that extends in the up-down direction and a second reinforcing member 447 that extends in the left-right direction.

The upper end surface of the first reinforcing portion 446 of each reinforcing body 445 is fixed by welding or the like in a state where it abuts against the back surface of the flat plate portion 442. The left end surface of each second reinforcing portion 447 of the pair of front and rear reinforcing bodies 445 on the right side is fixed by welding or the like in a state where it abuts against the inner surface (left surface) of the right bent portion 443. The right end surface of each second reinforcing portion 447 of the pair of front and rear reinforcing bodies 445 on the left side is fixed by welding or the like in a state where it abuts against the inner surface (right surface) of the left bent portion 443.

Cushion rubber 47 is provided on the underside of each second reinforcing portion 447 of the pair of left and right reinforcing bodies 445 on the front side. Similarly, cushion rubber 48 is provided on the underside of each second reinforcing portion 447 of the pair of left and right reinforcing bodies 445 on the rear side.

[Folding and unfolding of the front loading platform]
7 to 9 are side cross-sectional views for explaining folding and unfolding of the front receiving platform 42 relative to the base receiving platform 41. When an operator folds the front receiving platform 42 relative to the base receiving platform 41, the operator first grasps the gripping member 45 from the state shown in Fig. 6 and rotates the front receiving platform 42 counterclockwise in the figure relative to the connecting member 43 around the front shaft 423.

When the front load receiving platform 42 rotates 90° relative to the connecting member 43, as shown in FIG. 8, the wall portion on the base end side of the front load receiving platform 42 abuts against the cushion rubber 48 (see also FIG. 6) on the connecting member 43 side. This restricts the rotation of the front load receiving platform 42 relative to the connecting member 43.

Next, from the state shown in FIG. 8, when the operator pushes the gripping member 45 toward the base receiving platform 41, the connecting member 43 rotates counterclockwise in the figure around the base shaft 413 relative to the base receiving platform 41. As a result, the cover member 44 and the front receiving platform 42 rotate counterclockwise in the figure around the base shaft 413 together with the connecting member 43.

When the connecting member 43 rotates 90° relative to the base receiving platform 41, as shown in FIG. 9, the cushion rubber 47 (see also FIG. 6) on the connecting member 43 side abuts against the wall at the tip end of the base receiving platform 41. This restricts the rotation of the connecting member 43 relative to the base receiving platform 41, and the tip receiving platform 42 is folded onto the base receiving platform 41 so that the tip mounting surface 421a faces the base mounting surface 411a.

When the front receiving platform 42 is deployed from the state shown in FIG. 9 relative to the base receiving platform 41, the above-mentioned operation is reversed. As a result, as shown in FIG. 7, the front receiving platform 42 is deployed relative to the base receiving platform 41, and the front loading surface 421a is flush with the base loading surface 411a.

As a result, the front load receiving platform 42 can rotate between an unfolded position (position shown in FIG. 7) in which it is unfolded relative to the base load receiving platform 41, and a folded position (position shown in FIG. 9) in which it is folded onto the base load receiving platform 41. Therefore, the front load receiving platform 42 in FIGS. 3 to 6 all show the unfolded position.

[Lowering and raising the base loading platform]
2, when the load receiving platform 16 is in an elevated position described below, the base load receiving platform 41 can be raised and lowered relative to each lifting column 12, centering on the pin 17. Specifically, the base load receiving platform 41 can be raised and lowered between a lying position (position shown by a dashed line in FIG. 2) in which it is laid backward relative to each lifting column 12, and an upright position (position shown by a dashed line in FIG. 2) in which it stands up along the rear wall of each lifting column 12.

When the load-receiving platform 16 is in use, the base load-receiving platform 41 is in a collapsed position in the raised position, and the front load-receiving platform 42 is in an extended position. In this state, the load-receiving platform 16 is raised and lowered by the lifting mechanism 21. At that time, cargo is placed on the base loading surface 411a of the base load-receiving platform 41 and the front loading surface 421a of the front load-receiving platform 42.

When the load receiving platform 16 is not in use, the front load receiving platform 42 is folded from the unfolded position, and the base load receiving platform 41 is rotated upward from the lying position to the standing position in the raised position. As a result, the base load receiving platform 41 stands up along the rear walls of the pair of lifting supports 12, and the front load receiving platform 42 is positioned between the pair of lifting supports 12. As a result, the load receiving platform 16 is stored in a compact state in the vertical and front-to-rear directions.

[Securing mechanism]
1 and 4, the fastening mechanism 20 is a mechanism for fastening the base receiving platform 41 to each lifting column 12 in an upright position. The fastening mechanism 20 has a lock handle 20a provided on the right side of the base receiving platform 41 and a hook 20b fixed to the outer wall of the right lifting column 12. The lock handle 20a is provided rotatably and slidably in the left-right direction relative to the base receiving platform 41. The lock handle 20a is releasably engaged with the hook 20b. When the base receiving platform 41 is in an upright position, the lock handle 20a is rotated and slid to engage with the hook 20b, whereby the base receiving platform 41 is fastened in an upright position.

[Lifting mechanism]
1 and 2, the lifting mechanism 21 is a mechanism that raises and lowers the load-receiving platform 16 between the floor surface 2a of the platform 2 and the ground relative to the pair of lifting columns 12. The lifting mechanism 21 includes a hydraulic cylinder 22 arranged along the left-right direction within the cross member 19, and a fixed sheave, a movable sheave, and a wire (not shown). The fixed sheave, the movable sheave, and the wire are typical components of a vertical lifting mechanism, and therefore detailed description thereof will be omitted.

When the hydraulic cylinder 22 of the lifting mechanism 21 is extended or retracted, the slider 14 is raised or lowered along the lifting support 12 and the inner column 13 via a wire wound around the fixed sheave and the movable sheave. This allows the loading platform 16 to be raised or lowered between the raised position (position shown by the dashed line in FIG. 2) and the lowered position (position shown by the solid line in FIG. 2). When the loading platform 16 is in the raised position, the base loading surface 411a and the tip loading surface 421a of the loading platform 16 are at the same height as the floor surface 2a of the loading platform 2 (the upper surface 19a of the cross member 19). When the loading platform 16 is in the lowered position, the loading platform 16 is in contact with the ground via the cushion rubber 46.

As shown in FIG. 2, the loading platform lifting device 10 of this embodiment further includes an inversion mechanism 30 that inverts the lifting unit 11 with the loading platform 16 stored therein and places it on the loading platform 2. Note that the inversion mechanism 30 is not shown in FIG. 1. The inversion mechanism 30 includes an inversion support portion 31 that supports the pair of lifting columns 12 of the lifting unit 11 so that they can rotate about the horizontal axis C. As a result, the lifting unit 11 with the loading platform 16 stored therein is rotated (inverted) 180° counterclockwise in FIG. 2 about the horizontal axis C by the inversion mechanism 30 and placed on the loading platform 2.

[Effects of this embodiment]
According to the load-receiving-table lifting device 10 of this embodiment, when the front load-receiving table 42 is deployed relative to the base load-receiving table 41, the exposed portion 43a of the connecting member 43 exposed from the gap S between the base loading surface 411a and the front loading surface 421a is covered by the cover member 44. This makes it possible to prevent the load from coming into contact with the exposed portion 43a of the connecting member 43 when loading or moving the load on the load-receiving table 16, thereby making it possible to prevent the connecting member 43 from being damaged by such contact. Furthermore, if the cover member 44 comes into contact with the load and is damaged, only the cover member 44 needs to be replaced, thereby reducing maintenance costs.

In addition, when the cover member 44 covers the exposed portion 43a of the connecting member 43, the base plate 411 of the base receiving platform 41 is supported from the backside by one end (first support portion) 442a of the cover member 44, and the front plate 421 of the front receiving platform 42 is supported from the backside by the other end (second support portion) 442b of the cover member 44. This improves the strength of the receiving platform 16 when the front receiving platform 42 is deployed relative to the base receiving platform 41.

[others]
The loading platform lifting device 10 of the present embodiment is provided at the rear of the loading platform 2 so that luggage can be loaded and unloaded from the rear of the loading platform 2, but may be provided at the left or right side of the loading platform 2 so that luggage can be loaded and unloaded from the side of the loading platform 2. In addition, the loading platform lifting device 10 does not need to be provided with the reversing mechanism 30.

The load-receiving platform lifting device of the present invention is not limited to a vertical lifting type, but may be an under-floor storage type or an upright storage type in which the load-receiving platform is raised and lowered by a parallel link mechanism. The cover member 44 of this embodiment has a first support portion 442a and a second support portion 442b, but it is sufficient if it has at least one of the support portions.

The portion of the flat plate portion 442 of the cover member 44 located between the first support portion 442a and the second support portion 442b may be formed so as to be flush with the base plate 411 and the front plate 421 when the front load receiving platform 42 is in the deployed position. The flat plate portion 442 may not have the first support portion 442a and the second support portion 442b. In that case, the entire flat plate portion 442 may be disposed so as to be flush with the base plate 411 and the front plate 421 when the front load receiving platform 42 is in the deployed position.

It should be noted that the embodiments disclosed herein are illustrative in all respects and are not restrictive. The scope of the present invention is indicated by the claims, not by the meaning described above, and is intended to include all modifications within the scope of the claims and meanings equivalent thereto.

10 Load receiving platform lifting device 16 Load receiving platform 21 Lifting mechanism 41 Base loading platform 42 Front loading platform 43 Connecting member 43a Exposed portion 44 Cover member 411 Base plate 411a Base mounting surface 421 Front plate 421a Front mounting surface 442a One end (first support portion)
442b Other end (second support part)
S Gap

Claims (3)

A load receiving platform and a lifting mechanism for lifting and lowering the load receiving platform,
The loading platform is
a base receiving platform having a base receiving surface on which luggage is placed;
a front loading platform having a front loading surface on which luggage is placed and capable of being folded and unfolded relative to the base loading platform;
A connecting member having one end rotatably connected to the tip end of the base receiving platform and the other end rotatably connected to the base end of the front receiving platform;
A load receiving platform lifting device comprising: a cover member that covers an exposed portion of the connecting member that is exposed from the gap between the base loading surface and the front loading surface when the front loading platform is deployed relative to the base loading platform. The base loading platform has a base plate having a surface that is the base placement surface,
The load-receiving platform lifting device according to claim 1 , wherein the cover member has a first support portion that supports the base plate from a rear surface side of the base plate while covering the exposed portion. The front loading platform has a front plate whose surface is the front loading surface,
3. The loading platform lifting device according to claim 1, wherein the cover member has a second support portion that supports the front plate from a rear surface side of the front plate while covering the exposed portion.

Images