Loading platform lifting device and vehicle

Abstract

To provide a loading platform lifting device and vehicle in which the lifting drive unit is less likely to be exposed to water or other substances splashed up during travel. [Solution] The device comprises a loading platform having a loading surface, a base portion attached to the vehicle body, a link portion having a pair of opposing side walls rotatably connected to the loading platform and the base portion, a lifting drive unit rotatably connected to the link portion and the base portion between the pair of side walls of the link portion, a lifting drive unit connected to the loading platform and the base portion that extends and retracts between the loading platform and the base portion, a link portion having a pair of side walls sandwiching the lifting drive unit rotatably connected to the loading platform and the base portion, and a lower cover portion provided on the link portion that covers at least a portion of the lower side of the lifting drive unit.

Description

Technical Field

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[0001] The present invention relates to a loading platform lifting device and a vehicle.

Background Art

[0002] Patent Document 1 below discloses a vehicle equipped with a loading platform lifting device. This loading platform lifting device, for example, retracts the loading platform under the loading deck when the vehicle is running, while pulling out the loading platform from under the loading deck during cargo handling operations, and raises and lowers the loading platform between the floor height of the loading deck and the ground height.

[0003] By the way, since the loading platform lifting device is generally mounted near the rear wheels of the vehicle, it is likely to be exposed to water or the like lifted by the wheels (rear wheels) when the vehicle is running. Therefore, there is a risk that the lifting drive unit of the loading platform lifting device will rust due to water or the like lifted up.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Therefore, the problem is to provide a loading platform lifting device and a vehicle in which the lifting drive unit is less likely to be exposed to water or the like lifted up during running.

Means for Solving the Problems

[0006] The loading platform lifting device comprises a loading platform having a loading surface, a base portion attached to the vehicle body, a link portion having a pair of opposing side walls rotatably connected to the loading platform and the base portion, respectively, a lifting drive unit rotatably connected to the link portion and the base portion between the pair of side walls of the link portion, respectively, and a lower cover portion provided on the link portion that covers at least a portion of the lower side of the lifting drive unit.

[0007] The vehicle comprises the aforementioned loading platform lifting device and a vehicle body to which the loading platform lifting device is attached. [Brief explanation of the drawing]

[0008] [Figure 1] A side view of the main part of a vehicle according to one embodiment, showing the loading platform in the stowed position. [Figure 2] A side view of a loading platform lifting device according to the same embodiment, showing the loading platform in its lower end position. [Figure 3] A side view of a loading platform lifting device according to the same embodiment, showing the loading platform in the upper end position. [Figure 4] Top view of the main components of the loading platform lifting device according to the same embodiment. [Figure 5] Bottom view of the main component [Figure 6] Side view of the main component [Figure 7] Figure 4, section view along line IV-IV [Figure 8] Side view of a main part of a vehicle according to one embodiment [Modes for carrying out the invention]

[0009] In each drawing, the dimensions of components may be enlarged or reduced from their actual dimensions for the sake of clarity, and the dimensional ratios between drawings may not be consistent. Furthermore, in each drawing, some components may be omitted for the sake of clarity.

[0010] Ordinal numbers such as "1st," "2nd," etc., are used to describe various components, but these terms are used solely to distinguish one component from others, and the components are not particularly limited by these terms. Furthermore, the number of components containing ordinal numbers is not particularly limited; for example, there may be only one. Also, the ordinal numbers used in the following specification and drawings may differ from those stated in the claims.

[0011] In the following explanation, the first lateral direction D1 is also called the front-to-back direction, and within the first lateral direction D1, the direction of the arrow in each figure is defined as the front direction, and the direction opposite to the direction of the arrow in each figure is defined as the back direction. The second lateral direction D2 is also called the left-to-right direction, and within the second lateral direction D2, the direction of the arrow in each figure is defined as the left direction, and the direction opposite to the direction of the arrow in each figure is defined as the right direction.

[0012] In other words, each direction is defined as the direction as seen from the perspective of the person sitting in the driver's seat of the vehicle (the driver). Note that the terms "front / back" and "left / right" are used for explanatory purposes only; in reality, the front / back and left / right directions may be reversed, or they may be swapped (rotated by 90 degrees). Furthermore, the third direction D3 is the up / down direction D3.

[0013] The following description will explain one embodiment of the vehicle and loading platform lifting device with reference to Figures 1 to 7. Note that the following embodiment is provided as an example to aid in understanding the configuration of the vehicle and loading platform lifting device, and does not limit the configuration of the vehicle and loading platform lifting device.

[0014] As shown in Figure 1, the vehicle 1 comprises, for example, a vehicle body 2 and a loading platform lifting device 3 attached to the vehicle body 2. The vehicle 1 is not particularly limited and may be, for example, a cargo handling vehicle as in this embodiment. That is, the vehicle body 2 may comprise, for example, a vehicle frame 2a and a cargo box 2b positioned at the rear end of the vehicle body 2 and on the vehicle frame 2a, as in this embodiment.

[0015] As shown in FIGS. 1 and 2, the load receiving platform lifting device 3 may include, for example, a load receiving platform 4 having a load receiving surface 4a, a base portion 5 attached to the vehicle body frame 2a, a moving mechanism 6 for moving (sliding) the load receiving platform 4 and the base portion 5 in the front-rear direction D1, and a lifting mechanism 7 for lifting (moving in the vertical direction D3) the load receiving platform 4.

[0016] The load receiving platform 4 may include, for example, as in this embodiment, a first load receiving portion 4b and a second load receiving portion 4c disposed behind the first load receiving portion 4b and having a front end portion (base end portion) rotatably connected to a rear end portion (tip end portion) of the first load receiving portion 4b. Thus, when the load receiving platform 4 is not in use, as shown in FIG. 1, the second load receiving portion 4c is folded so as to overlap the first load receiving portion 4b.

[0017] On the other hand, when the load receiving platform 4 is in use, as shown in FIG. 2, the second load receiving portion 4c is deployed so that the load receiving surface 4a of the first load receiving portion 4b and the load receiving surface 4a of the second load receiving portion 4c are flush. Note that the number of load receiving portions 4b and 4c is not particularly limited, and may be, for example, two as in this embodiment, or may be three or more, or may be only one.

[0018] The moving mechanism 6 may include, for example, as in this embodiment, a guiding portion 6a for guiding the base portion 5 in the front-rear direction D1, and a front-rear driving portion (lateral driving portion) (not shown) for moving the base portion 5 in the front-rear direction D1. The front-rear driving portion is not particularly limited, and may be, for example, a cylinder that can expand and contract in the front-rear direction D1 or a motor. Thereby, the base portion 5 is moved in the front-rear direction D1 between a storage position located below the vehicle body 2 and an overhanging position that protrudes outward from below the vehicle body 2.

[0019] [[ID=1

[0020] As described above, as in this embodiment, the vehicle 1 includes the loading platform lifting device 3 and the vehicle body 2 to which the loading platform lifting device 3 is attached.

[0021] As shown in FIGS. 4 and 5, the lifting mechanism 7 includes a link portion 8 having a first side wall portion 8c and a second side wall portion 8d that are rotatably connected to the loading platform 4 and the base portion 5, and a lifting drive portion 9 disposed between the pair of side wall portions 8c and 8d of the link portion 8. Thereby, the loading platform 4 can be lifted from the lower end position as shown in FIG. 2 to the upper end position as shown in FIG. 3.

[0022] The link portion 8 may include, for example, as in this embodiment, a loading shaft portion 8a that is rotatably connected to the loading platform 4 (specifically, the front end portion of the first loading portion 4b), and a first base shaft portion 8b that is rotatably connected to the base portion 5.

[0023] For example, as in this embodiment, in a view in the left-right direction D2, the loading shaft portion 8a may be disposed at the first end portion of the link portion 8, and the first base shaft portion 8b may be disposed at the second end portion of the link portion 8.

[0024] The lifting drive portion 9 may include, for example, as in this embodiment, a base shaft 9a that is rotatably connected to the link portion 8 (specifically, the rear end portion of the link portion 8), and a second base shaft portion 9b that is rotatably connected to the base portion 5. For example, as in this embodiment, in a view in the left-right direction D2, the base shaft 9a may be disposed at the first end portion of the lifting drive portion 9, and the second base shaft portion 9b may be disposed at the second end portion of the lifting drive portion 9.

[0025] Further, when the lifting drive portion 9 expands and contracts, the loading platform 4 is lifted because the link portion 8 rotates about the loading shaft portion 8a. The configuration of the lifting drive portion 9 may be any configuration that can expand and contract between the base shaft 9a and the second base shaft portion 9b. For example, a hydraulic cylinder, an air cylinder, or a slide mechanism using a guide shaft and a roller may be used.

[0026] As shown in Figures 1 to 7, the lifting mechanism 7 includes a cover portion 10 provided on the link portion 8. The cover portion 10 may, for example, include a lower cover portion 10a that covers at least a portion of the lower side of the lifting drive unit 9 and an upper cover portion 10b that covers at least a portion of the upper side of the lifting drive unit 9, as in this embodiment.

[0027] As shown in Figure 5, the lower cover portion 10a is provided on the first side wall portion 8c and the second side wall portion 8d of the link portion 8 so as to cover at least a portion of the lower side of the lifting drive portion 9. This makes the lifting drive portion 9 less susceptible to exposure to water and other debris that may be kicked up during travel. Here, as shown in Figures 1 to 3, 6 and 7, if the lifting drive portion 9 is a cylinder (for example, a hydraulic cylinder or an air cylinder) in which the rod portion 9e slides against the base portion 9d, it is preferable that the lower cover portion 10a is installed so as to cover at least the lower part of the boundary portion 9f between the base portion 9d and the rod portion 9e within the operating range for raising and lowering the load receiving platform 4. This protects the boundary portion 9f from dust and water kicked up by the rear wheels and dust and water kicked up during operation, thereby suppressing the accumulation of foreign matter in the sliding part of the cylinder.

[0028] The lower cover portion 10a may be provided over the entire length of both ends of the link portion 8 in the front-rear direction D1. However, as shown in Figure 5, a grease nipple 9c may be provided at the position of the base shaft 9a. Therefore, from the viewpoint of facilitating maintenance, it is preferable that the lower cover portion 10a is provided on a part of the link portion 8 in the front-rear direction D1 so that the grease nipple 9c is exposed.

[0029] As shown in Figure 4, the upper cover portion 10b is provided on the first side wall portion 8c and the second side wall portion 8d of the link portion 8 so as to cover at least a portion of the upper side of the lifting drive portion 9. This makes the lifting drive portion 9 less susceptible to exposure to falling sand, dust, snow, etc. Here, as shown in Figures 1 to 3, 6 and 7, if the lifting drive portion 9 is a cylinder (for example, a hydraulic cylinder or an air cylinder) in which the rod portion 9e slides against the base portion 9d, it is preferable that the upper cover portion 10b is installed so as to cover at least the upper part of the boundary portion 9f between the base portion 9d and the rod portion 9e within the operating range for raising and lowering the load receiving platform 4. This protects the boundary portion 9f from falling sand, dust, snow, etc., and prevents foreign matter from getting stuck in the sliding part of the cylinder.

[0030] As shown in Figure 1, the upper cover portion 10b may be provided in such a way that its upper surface can be maintained at an inclination with respect to the horizontal plane. This makes it easier for sand, dust, snow, and other debris accumulated on the upper surface of the upper cover portion 10b to slide off, thus preventing them from accumulating.

[0031] Here, the sand, dust, snow, etc. that accumulate on the upper surface of the upper cover portion 10b are subject to inertia during driving, so the upper surface of the upper cover portion 10b may be parallel to the horizontal plane. However, it is preferable that the upper surface of the upper cover portion 10b be an inclined surface that decreases in height from the ground surface towards the rear end of the vehicle body 2, as shown in Figure 1, so that the accumulated sand, dust, snow, etc. can slide off more easily.

[0032] Furthermore, the upper cover portion 10b may have an inclined surface formed by, for example, a change in thickness in the front-rear direction D1. In addition, the upper cover portion 10b may have a curved surface that is convex upwards on its upper surface, or an inclined surface formed by combining surfaces that are convex upwards. This makes it easier for accumulated sand, dust, snow, etc. to slide off the upper cover portion 10b, and prevents them from accumulating.

[0033] The cover portion 10 may, for example, consist of a lower cover portion 10a and an upper cover portion 10b, which are separate members, or the lower cover portion 10a and the upper cover portion 10b may be integrally formed.

[0034] If the lower cover portion 10a and the upper cover portion 10b are integrally formed, the cover portion 10 can be attached and detached, for example, by sliding it along the link portion 8.

[0035] Furthermore, as shown in Figures 4 and 5, the lower cover portion 10a and the upper cover portion 10b may be detachably fixed by fixing means 10c and 10d (for example, screw members), or they may be fixed in a way that prevents them from being detached, for example, by welding. In this embodiment, the fixing means 10d fixes both the lower cover portion 10a and the upper cover portion 10b, but for example, the fixing means 10c may fix the lower cover portion 10a and the fixing means 10d may fix the upper cover portion 10b.

[0036] As shown in Figures 2 to 4, 6 and 7, the link portion 8 may include a restricting body 11 for restricting the loading platform 4 from moving above its upper end position, and a fixing member 11a through which the restricting body 11 is inserted, fixing the upper cover portion 10b to the link portion 8.

[0037] The restrictor 11 may, for example, be an upper cover portion 10b and a bolt (stopper bolt) inserted through a female screw provided inside the link portion 8, although not shown in the figure, as in this embodiment. As a result, the restrictor 11 restricts the movement of the loading platform 4 and also fixes the upper cover portion 10b, thus reducing the number of components, which in turn reduces the overall weight of the loading platform lifting device 3 and lowers manufacturing costs.

[0038] Furthermore, the restrictor 11 may be, for example, a pin that protrudes upward from the link portion 8 by a predetermined length. However, from the viewpoint of precisely controlling the upper end position of the load receiving platform 4, the restrictor 11 is preferably a bolt.

[0039] The fixing member 11a may be, for example, a nut that screws onto the restrictor 11 and fixes the upper cover portion 10b to the link portion 8, as in this embodiment. Alternatively, the fixing member 11a may be, for example, a spring through which the restrictor 11 is inserted and which presses the restrictor 11 and the upper cover portion 10b against each other.

[0040] As shown in Figures 4 and 6, the link portion 8 may be provided with a support 12a for supporting the cable 12. This ensures that the cable 12 is fixed to a predetermined position on the side of the link portion 8, thus preventing it from being caught in the link portion 8 or the lifting drive unit 9 during lifting operations. The support 12a may also be fixed to the link portion 8 by screwing it into a female screw formed on the first side wall portion 8c or the second side wall portion 8d of the link portion 8, as in this embodiment.

[0041] Furthermore, the lower cover portion 10a or the upper cover portion 10b may be fixed to the link portion 8 by the support 12a. This reduces the number of components in the load-receiving platform lifting device 3, thereby reducing manufacturing costs.

[0042] Furthermore, the lower cover portion 10a or the upper cover portion 10b may be configured to form a space for accommodating the cable 12 when attached to the link portion 8. This allows the lower cover portion 10a or the upper cover portion 10b to cover the lifting drive unit 9 and also accommodate the cable 12. As a result, the load-receiving platform lifting device 3 has a reduced number of components, and thus the manufacturing cost is reduced.

[0043] With this configuration, the lower side of the lifting drive unit 9 is covered by the lower cover unit 10a. As a result, the lifting drive unit 9 is less likely to be exposed to water or other substances that are splashed up during operation. This reduces the likelihood of rust forming on the lifting drive unit 9.

[0044] Based on the above, it is preferable that the vehicle 1 comprises the aforementioned loading platform lifting device 3 and the vehicle body 2 to which the loading platform lifting device 3 is attached, as in this embodiment.

[0045] Furthermore, as in this embodiment, it is preferable that the loading platform lifting device 3 comprises a loading platform 4 having a loading surface 4a, a base portion 5 attached to the vehicle body 2, a link portion 8 having a pair of opposing side walls 8c, 8d that are rotatably connected to the loading platform 4 and the base portion 5, respectively, a lifting drive unit 9 that is rotatably connected to the link portion 8 and the base portion 5 between the pair of side walls 8c, 8d of the link portion 8, and a lower cover portion 10a provided on the link portion 8 that covers at least a portion of the lower side of the lifting drive unit 9.

[0046] With this configuration, at least a portion of the lower side of the lifting drive unit 9 is covered by the lower cover unit 10a, so that the lifting drive unit 9 is less likely to be exposed to water or other debris that is splashed up during travel.

[0047] Furthermore, in the load-receiving platform lifting device 3, as in this embodiment, it is preferable that the lower cover portion 10a is detachable from the link portion 8.

[0048] With this configuration, the lower cover portion 10a can be attached, for example, to an existing loading platform lifting device 3 that has a link portion 8 of a mountable shape. Furthermore, with this configuration, if the lower cover portion 10a of the loading platform lifting device 3 deteriorates, for example, only the lower cover portion 10a can be replaced.

[0049] Furthermore, in the loading platform lifting device 3 as in this embodiment, it is preferable that the lifting drive unit 9 is a cylinder in which the rod portion 9e slides relative to the base portion 9d, and that the lower cover portion 10a covers at least the area below the boundary portion 9f between the base portion 9d and the rod portion 9e within the operating range for raising and lowering the loading platform 4.

[0050] With this configuration, the boundary portion 9f is protected from dust and water kicked up by the rear wheels and from dust and water kicked up during operation, thereby preventing foreign matter from getting stuck in the sliding parts of the cylinder.

[0051] Furthermore, as in this embodiment, it is preferable that the loading platform lifting device 3 further includes a moving mechanism 6 that moves the loading platform 4 in the front-rear direction D1 between a storage position located below the vehicle body 2 and an extended position that extends outward from below the vehicle body 2.

[0052] With this configuration, the loading platform lifting device 3 is stored entirely beneath the vehicle body 2 when not in use, such as during vehicle operation.

[0053] Furthermore, in this embodiment, it is preferable that the loading platform lifting device 3 further includes an upper cover portion 10b provided on the link portion 8 that covers at least a portion of the upper side of the lifting drive portion 9.

[0054] With this configuration, the loading platform lifting device 3 can prevent sand, dust, snow, and other debris from accumulating on the lifting drive unit 9.

[0055] Furthermore, in the loading platform lifting device 3 as in this embodiment, it is preferable that the lifting drive unit 9 is a cylinder in which the rod portion 9e slides relative to the base portion 9d, and that the upper cover portion 10b covers at least the upper part of the boundary portion 9f between the base portion 9d and the rod portion 9e within the operating range for raising and lowering the loading platform 4.

[0056] With this configuration, the boundary portion 9f is protected from falling sand, dust, snow, etc., thus preventing foreign matter from getting stuck in the sliding part of the cylinder.

[0057] Furthermore, as in this embodiment, in the loading platform lifting device 3, it is preferable that the upper cover portion 10b is provided in such a way that its upper surface can be maintained in an inclined state with respect to the horizontal plane.

[0058] With this configuration, the loading platform lifting device 3 makes it easier for sand, dust, snow, and other debris accumulated on the upper cover portion 10b to slide off along the inclined upper surface.

[0059] Furthermore, although the direction in which the upper surface of the upper cover portion 10b is inclined is arbitrary, it is preferable that the inclined surface becomes lower from the ground surface as it approaches the rear end of the vehicle body 2. With such a configuration, accumulated sand, dust, snow, etc. on the upper cover portion 10b will slide off more easily due to the inertia during driving.

[0060] It should be noted that the vehicle 1 and the loading platform lifting device 3 are not limited to the configuration of the embodiment described above, nor are they limited to the effects described above. Furthermore, it goes without saying that the vehicle 1 and the loading platform lifting device 3 can be modified in various ways without departing from the spirit of the present invention. For example, one or more of the configurations and methods described below may be arbitrarily selected and adopted in the configurations and methods of the embodiment described above.

[0061] (1) In the loading platform lifting device 3 according to the above embodiment, the loading platform 4 is configured to be stored under the loading box 2b or the vehicle frame 2a when it is in the storage position. However, the loading platform lifting device 3 is not limited to this configuration.

[0062] For example, as shown in Figure 8, the loading platform 4 may be configured to be stored in a position at the rear of the vehicle body 2 (specifically, the cargo box 2b) when not in use. In such a configuration, the loading platform 4 may also serve as the door of the cargo box 2b. Furthermore, as shown in Figure 8, the loading platform lifting device 3 may be configured to include a rotary drive unit 15 that rotates the loading platform 4 around the loading shaft 8a in order to move the loading platform 4 between the upper end position and the stored position.

[0063] (2) In the loading platform lifting device 3 according to the above embodiment, the cover portion 10 is configured to include a lower cover portion 10a and an upper cover portion 10b. However, the loading platform lifting device 3 may also be configured to include a lower cover portion 10a and not an upper cover portion 10b.

[0064] (3) In the loading platform lifting device 3 according to the above embodiment, the upper cover portion 10b is configured such that the restricting body 11 is inserted through it and fixed by the fixing member 11a. However, the upper cover portion 10b may be fixed by fixing means other than the restricting body 11 and the fixing member 11a. Alternatively, the loading platform lifting device 3 may be configured without the restricting body 11.

[0065] (4) In the load-receiving platform lifting device 3 according to the above embodiment, the cover portion 10 is configured such that the width D2 in the left-right direction is aligned with the width D2 of the link portion 8. However, the width D2 of the cover portion 10 may be greater than the width D2 of the link portion 8.

[0066] Furthermore, the loading platform lifting device 3 may be configured to include additional link sections separate from the link section 8. The cover section 10 may also be configured to cover at least a portion of each link section, including the lifting drive section 9. This prevents each link section, along with the lifting drive section 9, from being exposed to splashing water, falling sand and dust, snow, etc.

[0067] Furthermore, the cover portion 10 may be configured such that the lower cover portion 10a and the upper cover portion 10b have different widths in the left-right direction D2. Furthermore, the lower cover portion 10a and the upper cover portion 10b may be configured such that the width in the left-right direction D2 changes in the front-rear direction D1. Note that the length of the lower cover portion 10a and the upper cover portion 10b in the front-rear direction D1, and the position in the front-rear direction D1, are arbitrary.

[0068] (5) In the loading platform lifting device 3 according to the above embodiment, the lower cover portion 10a and the upper cover portion 10b are fixed by fixing members such as screws and bolts. However, the lower cover portion 10a and the upper cover portion 10b may be connected by a hinge to either the first side wall portion 8c or the second side wall portion 8d of the link portion 8, and fixed to the other by a fitting portion, engaging portion, or connecting pin. This makes it easier to attach and detach the lower cover portion 10a and the upper cover portion 10b of the loading platform lifting device 3, and allows for easy supply of grease to the grease nipple 9c even when the grease nipple 9c is covered by the lower cover portion 10a and the upper cover portion 10b.

[0069] (6) In the load-receiving platform lifting device 3 according to the above embodiment, the lower cover portion 10a and the upper cover portion 10b are fixed so as not to change their position. However, the lower cover portion 10a and the upper cover portion 10b may also be configured to be expandable or contractible relative to the base portion 5 and the link portion 8, for example, by being equipped with a biasing means, in accordance with the movement of the lifting drive portion 9 which moves to the outside of the link portion 8 during the lifting operation. [Explanation of symbols]

[0070] 1...Vehicle, 2...Vehicle body, 2a...Vehicle frame, 2b...Cargo box, 3...Loading platform lifting device, 4...Loading platform, 4a...Loading surface, 4b...First loading section, 4c...Second loading section, 5...Base section, 6...Moving mechanism, 6a...Guide section, 7...Lifting mechanism, 8...Link section, 8a...Loading shaft section, 8b...First base shaft section, 8c...Side wall section, 8d...Side wall section, 9...Lifting drive section, 9a...Base shaft, 9b...Second base D1...Shaft section, 9c...Grease nipple, 9d...Base section, 9e...Rod section, 9f...Boundary section, 10...Cover section, 10a...Lower cover section, 10b...Upper cover section, 10c...Fixing member, 10d...Fixing member, 11...Regulator, 11a...Fixing member, 12...Cable, 12a...Support, D1...First lateral direction (front-back direction), D2...Second lateral direction (left-right direction), D3...Up-down direction

Claims

1. A loading platform having a loading surface, A base part that is attached to the vehicle body, A link section having a pair of opposing side walls is rotatably connected to the loading platform and the base section, respectively. A lifting drive unit is rotatably connected to the link portion and the base portion, respectively, between the pair of side walls of the link portion, A loading platform lifting device comprising a lower cover portion that covers at least a portion of the lower side of the lifting drive portion provided on the link portion.

2. The lower cover portion is detachable from the link portion, as described in claim 1, for the load receiving platform lifting device.

3. The aforementioned lifting drive unit is a cylinder in which the rod portion slides relative to the base, The loading platform lifting device according to claim 1, wherein the lower cover portion covers the area below the boundary between the base portion and the rod portion within the operating range for raising and lowering the loading platform.

4. The loading platform lifting device according to claim 1, further comprising a moving mechanism for moving the loading platform in the front-rear direction between a stowed position located below the vehicle body and an extended position that extends outward from below the vehicle body.

5. The loading platform lifting device according to any one of claims 1 to 4, further comprising an upper cover portion that covers at least a portion of the upper side of the lifting drive portion provided on the link portion.

6. The upper cover portion is detachable from the link portion, A restricting body is provided on the link portion to prevent the load receiving platform from moving above its upper end position, and to stop the link portion from moving upward. The loading platform lifting device according to claim 5, further comprising a fixing member through which the restricting body is inserted and which fixes the upper cover portion to the link portion.

7. The aforementioned lifting drive unit is a cylinder in which the rod portion slides relative to the base, The loading platform lifting device according to claim 5, wherein the upper cover portion covers at least the area above the boundary between the base portion and the rod portion within the operating range for raising and lowering the loading platform.

8. The loading platform lifting device according to claim 5, wherein the upper cover portion is provided so as to be able to maintain its upper surface in an inclined state with respect to the horizontal plane.

9. A loading platform lifting device according to any one of claims 1 to 4, A vehicle comprising a vehicle body to which the aforementioned loading platform lifting device is attached.

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