JP7844583B2 - Loading platform lifting device - Google Patents

Description

This invention relates, for example, to a loading platform lifting device that can be stored under a cargo box in a cargo vehicle having a cargo box.

Patent Document 1 below describes a conventional loading platform lifting device. The loading platform lifting device is attached to the lower rear end of the frame of a vehicle equipped with a loading platform, and can be folded and stored (retained) under the frame during driving. Furthermore, during loading and unloading operations, the loading platform, which slides out from the rear of the frame, can be raised and lowered between the height of the loading platform floor and the ground level, assisting in the loading and unloading of goods and workers according to the operation.

When the loading platform is folded and stored at its base, the underside of the loading platform body faces upward. A torsion bar is attached to this underside of the loading platform body to reduce the force required to fold it, and a cover is provided to conceal the torsion bar.

When stored, the rear end surface of the cover is exposed to the rear of the vehicle along with the rear end surface of the base of the loading platform when the loading platform is retracted. These end surfaces of the loading platform base and the loading platform body, including the cover, which are exposed to the rear of the vehicle, constitute a bumper surface that functions as a rear bumper for the vehicle. The cover is formed, for example, by extrusion molding in the width direction of the loading platform body.

Japanese Patent Publication No. 2006-123620

In the above-described loading platform lifting device, as stated above, the rear end surface of the cover when stored constitutes a bumper surface that functions as a bumper.

However, the cover is formed by extrusion molding in the width direction of the loading platform body. Since the cover is often made of aluminum alloy, it is susceptible to damage from collisions or contact with other vehicles.

Therefore, the present invention aims to provide a loading platform lifting device that can improve the strength when the loading platform is also used as a bumper.

The present invention provides a loading platform lifting device in which the loading platform is folded and stored below a cargo box on a cargo vehicle. During loading and unloading, the loading platform can be slid outwards from the cargo vehicle to unfold, and the device can be switched to a usage state where it moves up and down using a lifting mechanism. The loading platform is characterized in that, in the stored state, it comprises a frame connected to the lifting mechanism and extending along the outer end of the loading platform, and a loading plate covering the upper and outer end surfaces of the frame.

In the above-described loading platform lifting device, the loading platform doubles as a bumper for the cargo vehicle when retracted. A frame is positioned along the outer edge of the loading platform, and a loading plate is provided to cover the upper and outer surfaces of the frame. Therefore, in the retracted state, damage to the loading platform can be prevented, for example, in the event of a collision or contact with another vehicle.

In the loading platform lifting device of the present invention, the frame can be configured such that, in the stored state, when the loading platform lifting device is installed at the rear of the cargo vehicle, it extends in the vehicle width direction at the rear end of the loading platform, and when the loading platform lifting device is installed to the side of the cargo vehicle, it extends in the vehicle front-rear direction at the vehicle side end of the loading platform.

In the loading platform lifting device with the above configuration, the frame is arranged such that, when the loading platform lifting device is installed at the rear of the cargo vehicle, it extends in the vehicle width direction at the rear end of the loading platform, and when the loading platform lifting device is installed at the side of the cargo vehicle, it extends in the vehicle longitudinal direction at the vehicle side end of the loading platform. Therefore, the outer end of the loading platform can be made more robust.

In the load-receiving platform lifting device of the present invention, the frame can be configured to extend along the outer ends of the load-receiving platform from one end to the other.

In the loading platform lifting device with the above configuration, the frame extends along the outer edge of the loading platform from one end to the other, thus reinforcing the outer edge of the loading platform when it is stored.

In the loading platform lifting device of the present invention, the frame comprises a first frame arranged to extend along the outer end of the loading platform in the stored state, and a second frame attached to the first frame and supporting the first frame. The second frame extends at an inclination with respect to the direction in which the first frame extends, and a configuration can be adopted in which the first frame and a predetermined location inside the loading platform are connected.

In the loading platform lifting device with the above configuration, the first frame and a second frame that diagonally connects to a predetermined location inside the loading platform are made stronger.

According to the present invention's loading platform lifting device, since it is equipped with a frame extending along the outer edge of the loading platform in the stowed state, it can improve the strength when the loading platform is also used as a bumper for a cargo vehicle.

This is a side view showing a loading platform lifting device according to one embodiment of the present invention attached to a cargo vehicle. This is a perspective view showing the lifting and lowering device for the loading platform. This is a side view of the loading platform lifting device in the extended state, with a solid line indicating the loading platform in the grounded state and a dashed line indicating the loading platform in the raised state. This is a schematic diagram illustrating the overall configuration of the loading platform in use. This is a plan view showing the framework of the loading platform. This is an enlarged cross-sectional view of the main part showing the usage condition of the loading platform.

The following describes a retractable loading platform lifting device (hereinafter referred to as the loading platform lifting device) according to one embodiment of the present invention.

The loading platform lifting device 1 is installed below the rear of the cargo box B on the cargo vehicle V, as shown in Figure 1. Note that the cargo box B may be a box-shaped structure that forms a closed space when the entrance is closed, or it may be a cargo platform with, for example, a constantly open top.

In this embodiment, Figure 1 shows the state in which the loading platform lifting device 1 is stored below the rear of the cargo box B on the cargo vehicle V, i.e., the cargo vehicle V is drivable. On the other hand, Figure 3 is a side view showing the usage state in which the movable support member 13 of the loading platform lifting device 1 is slid from the front slide end position (forward position) to the rear of the cargo box B, reaches a predetermined rear slide end position (rear position), and then the loading platform 19 is deployed and raised/lowered for loading and unloading work. As shown in Figure 1, the cargo box B is mounted on the body 2 of the cargo vehicle V. A so-called underfloor storage type loading platform lifting device 1 is stored below the rear end of the body 2.

The fixed-side support members 3, provided in a pair on the left and right sides in the vehicle width direction of the loading platform lifting device 1, each consist of a slide rail 4 extending horizontally in the vehicle's longitudinal direction, a plurality (three in this embodiment) of mounting brackets 5 for mounting the slide rail to the vehicle body 2, and a connecting member 6 made of a square pipe that connects the front ends of the pair of slide rails 4. The slide rails 4 and each mounting bracket 5 are fastened together with bolts and nuts 7. A support plate 8 is slidably mounted on the slide rail 4 in the vehicle's longitudinal direction.

The left and right support plates 8 pass through a cross member 9, which is made of a square pipe extending horizontally in the vehicle width direction, and are welded together as a single unit. Outward from the support plates 8 in the vehicle width direction, support brackets 10 and 11 are welded together with the cross member 9. These support brackets 10 and 11 are also provided in pairs, left and right.

The lower parts of the pair of left and right support plates 8 are connected by a connecting member 12 made of channel material. The support plates 8, cross member 9, support brackets 10 and 11, and connecting member 12 constitute a movable support member 13 that is slidable in the vehicle's longitudinal direction relative to the fixed support member 3.

An auxiliary link 14 is attached to the support bracket 10 so as to be rotatable within a certain range. An upper arm 15 and a lift cylinder (lifting drive device) 16 are rotatably attached to this auxiliary link 14. The tip of the lift cylinder 16 is connected to a predetermined position on the upper arm 15, and torque is applied to the upper arm 15 through its extension and retraction operation. A lower arm 17 is also rotatably attached to the support bracket 11. The lift cylinder 16 is, for example, a single-acting hydraulic cylinder.

The upper arm 15 and lower arm 17 form a parallel link where the quadrilateral connecting their fulcrum and point of application is a parallelogram. The extension and retraction of the lift cylinder 16 causes their ends to move up and down. The auxiliary link 14, upper arm 15, lift cylinder 16, and lower arm 17 are provided in pairs on the left and right sides, forming an arm-type lifting mechanism 18 that raises and lowers the loading platform 19.

The loading platform 19 comprises a main plate (base loading platform) 191 horizontally attached to pins 15a and 17a (see Figure 4) positioned at the ends of the upper arm 15 and lower arm 17, a sub-plate (front loading platform) 192 connected to the main plate in a foldable and unfoldable manner, and a connecting portion 193 that connects the main plate 191 and the sub-plate 192. The connecting portion 193 has a hinge 193a (see Figure 4) at one end, which is rotatably connected to the tip of the main plate 191, and at the other end, which is rotatably connected to the base end of the sub-plate 192.

The loading platform 19 (main plate 191 and sub-plate 192) is formed by connecting multiple hollow aluminum alloy profiles 50 in parallel to create a loading surface (corresponding to a loading plate) 19A. In the stored state shown in Figure 4, the hollow profiles 50 have a pair of upper and lower parts, an upper 50A and a lower 50B. The hollow profiles 50 are formed by extruding aluminum alloy to create a hollow, plate-like structure, and their total length is approximately equal to the width of the loading box B.

In particular, the main plate 191 supports the load-receiving surface 19A by providing a framework extending along the outer edge of the load-receiving platform 19, comprising a hollow profile 50, a steel horizontal stiffener (first framework) 51, a vertical stiffener 52, and an inclined bracket (second framework) 53 connecting the horizontal stiffener 51 and the vertical stiffener 52.

The transverse stiffener 51, in its stowed state, is positioned at the rear end of the main plate 191, as shown in Figure 5, where it is located at the rear of the cargo vehicle V. The transverse stiffener 51 extends in the vehicle width direction of the loading platform 19, from one end to the other. In this case, "one end to the other" refers to the distance from the right end to the left end in the vehicle width direction.

Specifically, the horizontal stiffener 51 comprises a central stiffener 54 located in the center in the vehicle width direction, and end stiffeners 55 on both sides thereof. The central stiffener 54 is positioned between the vertical stiffeners 52, which will be described later. The end stiffeners 55 are positioned in the vehicle width direction (left and right) relative to the vertical stiffeners 52, and each end stiffener 55 is set to be slightly shorter than the left and right ends in the vehicle width direction.

As shown in Figure 6, the cross-section of the transverse stiffener 51 has an upper surface 51a, a lower surface 51b, and side surfaces 51c and 51d. The transverse stiffener 51 is fixed to the rear of the hollow profile 50 by bolts 61 (see Figure 5) at its upper surface 51a.

The upper surface 51a of the transverse stiffener 51 is located behind the rib 56 at the rearmost end of the hollow profile 50 and is in contact with the upper part 50A of the hollow profile 50 from below. The lower surface 51b is located below the hollow profile 50.

Furthermore, the upper part of one side (front of the vehicle) 51c abuts from the rear against the rib 56 at the rearmost end of the hollow profile 50. The other side (rear of the vehicle) 51d abuts from the front against an extension 57 that extends downward from the rear end of the load-receiving surface 19A. Additionally, a bottom surface 57a is formed at the lower end of the extension 57, extending forward towards the vehicle, and the bottom surface 57a slightly covers the rear lower corner of the bottom surface 51b.

In other words, the upper surface 51a of the horizontal stiffener 51 is covered from above by the hollow profile 50, and the other side surface 51d is covered from the rear by the extension 57. Note that in this case, the other side surface 51d represents the rear, as it indicates the stowed state in the vehicle.

As shown in Figure 5, the vertical stiffeners 52 are arranged in pairs at predetermined intervals from the ends in the vehicle width direction. The vertical stiffeners 52 are formed by combining sheet metal members to create a roughly rectangular tubular cross-section. In use, the vertical stiffeners 52 have a tapered shape, with the lower surface gradually approaching the rear end relative to the horizontally extending upper surface. The hollow profile 50, main plate (base load receiving platform) 191, and sub-plate 192 are arranged along the upper surface of the vertical stiffeners 52, respectively.

In particular, in the stowed state, the vertical stiffener 52 positioned on the main plate 191 extends in the vehicle's longitudinal direction from the lower part 50B of the hollow profile 50 to the rear end. Furthermore, as shown in Figure 5, a bracket 52a is integrated with the base end of the vertical stiffener 52 by welding or other means, and the vertical stiffener 52 is connected to the lifting mechanism 18 (hinge 193a) via this bracket 58.

At the lower part 50B of the hollow profile 50, it is attached by a bolt 59 that passes through the upper part of the vertical stiffener 52, thereby integrally forming the hollow profile 50 and the vertical stiffener 52. Furthermore, the rear upper part of the vertical stiffener 52 is covered by the hollow profile 50, and the rear end of the vertical stiffener 52 is covered from the rear by the extension 57.

As shown in Figure 5, the inclined brackets 53 are arranged in pairs on the left and right sides in the vehicle width direction. In the retracted state, the inclined brackets 53 consist of an upper surface 53a, a side surface 53b on the front side of the vehicle body, a side surface 53c on the rear side of the vehicle body, and a bottom surface 53d connecting both side surfaces 53b and 53c.

The bottom surface 53d of the inclined bracket 53 is attached by bolts 60 to the outer side in the vehicle width direction of the lower surface 51b of the horizontal stiffener 51, and to the bracket 58 located at the rear in the vehicle width direction on the vertical stiffener 52. This connects the horizontal stiffener 51 and the vertical stiffener 52 diagonally via the inclined bracket 53. In other words, the inclined bracket 53 is attached to the horizontal stiffener (first frame) 51 and is a support member for the horizontal stiffener 51. The inclined bracket 53 extends at an angle relative to the direction in which the horizontal stiffener 51 extends, connecting the horizontal stiffener 51 to the vertical stiffener 52 (bracket 58) located inside the loading platform 19. Furthermore, in the inclined bracket 53, the portion attached to the lower surface 51b of the horizontal stiffener 51 is covered by a hollow profile 50 facing upwards and an extension 57 facing backwards.

With the above configuration, as shown in Figure 1, the sub-plate 192 is folded onto the main plate 191 when stored. Furthermore, as shown in Figure 3, when in use, the sub-plate 192 is unfolded, creating a continuous loading surface 19A on the loading platform 19, extending from the top surface of the main plate 191 to the top surface of the sub-plate 192. The cargo to be loaded and unloaded from the loading box B is placed on this loading surface 19A.

With the loading surface 19A configured in this way, when the lift cylinder 16 is extended or retracted, the loading platform 19 can be raised and lowered between a raised position (the position of the upper dashed line in Figure 3) where the loading surface 19A is at approximately the same height as the floor of the cargo box B (not shown) and a grounded position (the position of the solid line in Figure 3). This allows loading and unloading of cargo onto the cargo box B of the freight vehicle V by raising and lowering the loading platform 19 at the rear of the cargo box B.

Each of the aforementioned pair of left and right support plates 8 has a roller mounting plate 20 attached so as to protrude backward, and a guide roller 21 is rotatably mounted at its rear end. The tip of the subplate 192 can be placed on this guide roller 21.

Next, we will describe the slide cylinder (forward/backward drive device) 22 that slides (moves back and forth) the loading platform lifting device 1 between the forward and rear positions. Figure 3 shows the slide cylinder 22 in its most retracted state.

The slide cylinder 22 is composed of a pair of left and right cylinders 23 positioned between the left and right slide rails 4 in the vehicle width direction. The cylinders 23 are, for example, double-acting hydraulic cylinders. The cylinder bodies 24 of the left and right cylinders 23 are superimposed with their front and rear ends facing opposite directions, and are integrally connected at the front-to-rear position.

With the above configuration, when using the loading platform 19 stored in the cargo vehicle V, the slide cylinder 22 is extended and slid backward to its rearward position. Next, when the lift cylinder 16 is retracted, the upper arm 15 and lower arm 17 rotate downward, and the main plate 191 lands. At this time, since the tip of the sub-plate 192 is on the guide roller 21, the sub-plate 192 rotates clockwise around the connecting portion 193 in the direction shown in Figure 3.

Next, the sub-plate 192 is manually raised and laid horizontally behind the main plate 191. In this way, the loading platform 19 is deployed horizontally. In this state, extending the lift cylinder 16 allows the loading platform 19 to be raised to the raised position shown in the upper part of Figure 3, while maintaining its horizontal position. Furthermore, retracting the lift cylinder 16 from the raised position lowers the loading platform 19 back to its original position.

Furthermore, when the lower arm 17 lands and the lift cylinder 16 is further retracted, the auxiliary link 14 causes the loading platform 19 to tilt downwards, lowering its front end (rear end), and becoming level with the ground as shown in the lower part of Figure 3. This allows, for example, a cart with casters (not shown) to be easily loaded and unloaded onto the loading surface 19A by moving it from the rear to the front of the loading platform 19.

To store the loading platform 19, the sub-plate 192 is raised from a position where the lower arm 17 is on the ground and the loading platform 19 is horizontal, and then leaned against the guide roller 21. Next, the upper arm 15 and lower arm 17 are raised, and the sub-plate 192 is folded onto the main plate 191 by its own weight. Then, the slide cylinder 22 is retracted, and the movable side support member 13, the lifting mechanism 18, and the loading platform 19 are retracted to the forward position, resulting in the stored state shown in Figure 1.

As shown in Figure 2, a power unit 30 equipped with a control device for controlling the drive of the loading platform lifting device 1 (specifically, the lift cylinder 16 and slide cylinder 22) is attached to one longitudinal end of the cross member 9. A switch box 31 for outputting operation commands to the control device for raising, lowering, or sliding the loading platform 19 is attached to the other longitudinal end of the cross member 9.

Incidentally, the loading platform lifting device 1 of the cargo vehicle V in this embodiment is switchable between a stowed state and an operational state. In the stowed state, the loading platform 19 also serves as the bumper of the cargo vehicle V. In this case, the loading platform 19 is supported by a frame extending from its outer end, which in this embodiment consists of a horizontal stiffener (first frame) 51, a vertical stiffener 52, and an inclined bracket (second frame) 53 connecting the horizontal stiffener 51 and the vertical stiffener 52.

Specifically, in the stowed position, the steel horizontal stiffener 51 is positioned at the rear end of the loading platform 19, extending in the vehicle width direction. The vertical stiffener 52 is constructed in a rectangular tubular shape by combining sheet metal members, extending in the vehicle's longitudinal direction and reaching the rear end of the loading platform 19. Furthermore, a pair of inclined brackets 53 are positioned on the left and right sides in the vehicle width direction, with their ends attached to the horizontal stiffener 51 and vertical stiffener 52. The horizontal stiffener 51 and vertical stiffener 52 are connected by the inclined brackets 53. Of the horizontal stiffeners 51, the central stiffener 54 is strong because it has vertical stiffeners 52 on both sides, whereas the end stiffeners 55 are located outside the vertical stiffeners 52. Therefore, the outer ends of the end stiffeners 55 are not strong without support. For this reason, the inclined brackets 53 are supported on the vertical stiffener 52 side to provide a strong structure.

Therefore, when the loading platform 19 is used as a bumper for the cargo vehicle V in the stowed state, the lateral stiffener 51 can reinforce the outer end of the loading platform 19 of the cargo vehicle V. Furthermore, the inclined bracket 53 further strengthens the overall framework of the lateral stiffener 51 and the inclined bracket 53, thereby further reinforcing the outer end of the loading platform 19 of the cargo vehicle V.

For example, in the event of a collision or contact in the center of the vehicle width direction, the central stiffener 54 of the lateral stiffener 51, which abuts the extension 57 of the hollow member 50, primarily mitigates the collision or contact. Similarly, in the event of a collision or contact at the end of the vehicle width direction, the end stiffener 55 mitigates the collision or contact. This prevents damage to the loading platform 19. Furthermore, it prevents another vehicle from crawling under the cargo vehicle V.

Furthermore, the upper surface 51a and sides 51c, 51d of the horizontal stiffener 51, the rear upper and rear surfaces of the vertical stiffener 52, and the mounting portion of the inclined bracket 53 to the lower surface 51b of the horizontal stiffener 51 are covered with hollow aluminum alloy profiles 50 and extensions 57, thus making them less susceptible to rust due to aging.

Although one embodiment of the present invention has been described above, various modifications are possible without departing from its spirit. Furthermore, the specific configuration of each part is not limited to the above embodiment.

For example, in the above embodiment, the lateral stiffener 51 is exemplified as comprising a central stiffener 54 in the center in the vehicle width direction and end stiffeners 55 on both sides at the rear end of the loading platform 19 of the vehicle. However, even if the lateral stiffener 51 consists only of the central stiffener 54 or only the end stiffeners 55, it is still possible to protect the loading surface 19A of the cargo vehicle in its stowed state.

Furthermore, in the above embodiment, the end stiffeners 55 were shown to be set slightly shorter from the left and right ends in the vehicle width direction. However, the end stiffeners 55 can also be arranged to extend from the vertical stiffeners 52 to the left and right ends of the vehicle.

In the above embodiment, when the frame is located at the rear of the cargo vehicle V in the stored state, it was described as extending in the vehicle width direction at the rear end of the loading platform 19. However, when the frame is located to the side of the cargo vehicle V in the stored state, it can also be configured to extend in the vehicle longitudinal direction at the vehicle side end of the loading platform 19. In this case, where a frame extending in the vehicle longitudinal direction at the vehicle side end of the loading platform 19 is provided, it is also possible to support another frame, for example, by passing it through the ribs of a hollow profile 50, at a predetermined location inside the loading platform 19. Alternatively, the frame can be provided in both cases: extending in the vehicle width direction at the rear end of the loading platform 19, and extending in the vehicle longitudinal direction at the vehicle side end of the loading platform 19.

In the above embodiment, the cross-section of the transverse stiffener 51 had an upper surface 51a, a lower surface 51b, and side surfaces 51c and 51d, as shown in Figure 6. However, it is not limited to this, and for example, the lower surface 51b may be omitted.

In the above embodiment, the upper surface 51a of the transverse stiffener 51 is positioned behind the rib 56 at the rearmost end of the hollow profile 50. Furthermore, a projection may be formed below the rib 56 in the vehicle width direction to withstand collisions and contacts.

In the above embodiment, the horizontal stiffeners 51 (central stiffener 54, end stiffeners 55) and the hollow profile 50 are in direct contact. However, it is also conceivable that contact may occur via other components, such as a cushioning material like a rubber sheet.

The above embodiment describes a case where the inclined bracket 53 is placed on the end stiffener 55. However, it is also possible to place an inclined bracket, which is a supporting member, on the central stiffener 54. In this case, the inclined bracket 53 supporting the end stiffener 55 can be omitted.

In the above embodiment, the hollow profile 50 was formed from a hollow plate-like body, but it may also be a simple plate-like body.

In the above embodiment, the loading platform lifting device 1 was exemplified as an arm-type lifting mechanism 18. However, the lifting mechanism may also be a vertical lifting type in which a wire is attached to a lifting column erected at the rear of the loading box B, and a loading platform is provided by a link mechanism on the wire.

1…Loading platform lifting device, 2…Vehicle body, 15…Upper arm, 15a, 17a…Pin, 17…Lower arm, 18…Lifting mechanism, 19…Loading platform, 19A…Loading surface, 50…Hollow profile, 50A…Upper part, 50B…Lower part, 51…Horizontal stiffener (first frame), 52…Vertical stiffener, 53…Inclined bracket (second frame), 54…Center stiffener, 55…End stiffener, 56…Rib, 57…Extension, 191…Main plate (base loading platform), 192…Subplate (front loading platform), B…Cargo box, V…Cargo vehicle

Claims (7)

This is a loading platform lifting device that allows the loading platform to be folded and stored below the cargo box on a cargo vehicle, and then slid outwards from the stored state to unfold the loading platform when loading or unloading cargo, and is then operated by a lifting mechanism to move it up and down.
In the stored state, the loading platform is equipped with a frame that is connected to the lifting mechanism and extends along the outer end of the loading platform.
The outer end of the aforementioned loading platform is,
When the loading platform lifting device is installed at the rear of the cargo vehicle, the rear end is relative to the cargo vehicle.
When the loading platform lifting device is installed on the side of the cargo vehicle, the side end is relative to the cargo vehicle.
The frame comprises, in the stored state, a first frame positioned to extend along the outer end of the loading platform, and a second frame attached to the first frame and supporting the first frame.
The second frame extends at an angle with respect to the direction in which the first frame extends, and is configured as an inclined bracket connecting the first frame and a predetermined location inside the loading platform from its outer end, in a loading platform lifting device. The designated location inside the aforementioned loading platform is,
When the loading platform lifting device is installed at the rear of the cargo vehicle, the loading platform is a pair of vertical stiffeners arranged at a predetermined distance in the vehicle width direction.
The loading platform lifting device according to claim 1, wherein, when the loading platform lifting device is provided on the side of the cargo vehicle, it is a pair of vertical stiffeners arranged on the loading platform at a predetermined distance from each other in the front-rear direction of the vehicle . The aforementioned loading platform lifting device further comprises an arm that constitutes the lifting mechanism and whose tip moves up and down by rotation,
The loading platform lifting device according to claim 2, wherein the arms are arranged in pairs at a predetermined interval in the vehicle width direction when the loading platform lifting device is provided at the rear of the cargo vehicle, and in the vehicle front-rear direction when it is provided on the side , and are connected to the longitudinal stiffener. The loading platform lifting device according to claim 2 or 3, wherein the first frame comprises an end stiffener positioned outside the longitudinal stiffener in the vehicle width direction when the loading platform lifting device is provided at the rear of the cargo vehicle, and in the vehicle longitudinal direction when it is provided at the side . The cargo receiving platform is folded and stored below the cargo box on the cargo vehicle, and when loading or unloading cargo, it is slid outwards from the cargo vehicle to unfold the cargo receiving platform, and the lifting mechanism allows it to be switched to a state of use where it moves up and down.
The loading platform, in the stored state, includes the frame connected to the lifting mechanism and extending along the outer end of the loading platform.
The outer end of the aforementioned loading platform is,
When the loading platform lifting device is installed at the rear of the cargo vehicle, the rear end is relative to the cargo vehicle.
When the loading platform lifting device is installed on the side of the cargo vehicle, the side end is relative to the cargo vehicle.
The loading platform lifting device further includes a pair of longitudinal stiffeners arranged on the loading platform at a predetermined distance from each other: in the vehicle width direction when the loading platform lifting device is located at the rear of the cargo vehicle, and in the vehicle front-rear direction when the loading platform lifting device is located on the side of the cargo vehicle .
The loading platform lifting device according to claim 1, wherein the frame comprises a central stiffener extending between the pair of vertical stiffeners in the vehicle width direction when the loading platform lifting device is provided at the rear of the cargo vehicle, and in the vehicle front-rear direction when the loading platform lifting device is provided at the side of the cargo vehicle . The loading platform lifting device according to claim 5, wherein the central stiffener is connected to the side surface of the vertical stiffener. This is a loading platform lifting device that allows the loading platform to be folded and stored below the cargo box on a cargo vehicle, and then slid outwards from the stored state to unfold the loading platform when loading or unloading cargo, and is then operated by a lifting mechanism to move it up and down.
The aforementioned loading platform has a hollow profile,
In the stored state, the loading platform is equipped with a frame that is connected to the lifting mechanism and extends along the outer end of the loading platform.
The outer end of the aforementioned loading platform is,
When the loading platform lifting device is installed at the rear of the cargo vehicle, the rear end is relative to the cargo vehicle.
When the loading platform lifting device is installed on the side of the cargo vehicle, the side end is relative to the cargo vehicle.
The hollow member has ribs extending in the thickness direction of the loading platform,
The aforementioned frame is a loading platform lifting device, the frame of which a portion of the rib abuts against the side surface.