Load receiving platform lifting apparatus and vehicle

Abstract

To provide a load receiving platform lifting apparatus capable of restraining dust from intruding into a support.SOLUTION: A load receiving platform lifting apparatus comprises: a cylindrical support which extends in a vertical direction; an inner part which is inserted into the support and which moves in the vertical direction with respect to the support; a guide roller which is arranged within the support and in a lower part of the support and which guides the inner part; a load receiving platform which moves in the vertical direction with respect to the support; and a lower cover part which is arranged below the guide roller and which overlaps at least a part of the guide roller in a vertical view.SELECTED DRAWING: Figure 13

Description

Technical Field

[0001] This specification relates to a load receiving platform lifting device and a vehicle.

Background Art

[0002] Conventionally, for example, a load receiving platform lifting device includes a cylindrical support column extending in the vertical direction and an inner part inserted into the support column and moving vertically with respect to the support column (for example, Patent Document 1). By the way, in the load receiving platform lifting device according to Patent Document 1, since the lower opening of the support column is open, dust easily enters the inside of the support column.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Therefore, the problem is to provide a load receiving platform lifting device and a vehicle capable of suppressing the entry of dust into the inside of the support column.

Means for Solving the Problems

[0005] [1] The load receiving platform lifting device includes a cylindrical support column extending in the vertical direction, an inner part inserted into the support column and moving vertically with respect to the support column, a guide roller disposed inside the support column and at the lower part of the support column for guiding the inner part, a load receiving platform moving vertically with respect to the support column, and a lower cover part disposed below the guide roller and overlapping at least a part of the guide roller in a vertical view.

[0006] [2] In the loading platform lifting device of the above [1], The lower cover part is fixed to the lower part of the column, and includes a first cover material that overlaps a part of the guide roller in a vertical view, is fixed to the lower part of the inner part, and includes a second cover material that overlaps a part of the guide roller in a vertical view so as to overlap the entire guide roller in a vertical view with the first cover material. Such a configuration may be adopted.

[0007] [3] The loading platform lifting device includes a cylindrical column extending in the vertical direction, an inner part inserted into one lateral side of the column and moving vertically with respect to the column, a loading platform moving vertically with respect to the column, and a lower cover part disposed below the column and overlapping at least a part of the lower opening of the column in a vertical view. In a vertical view, the lower cover part is continuously disposed in the lateral direction from at least the other lateral side end of the lower opening to the inner part.

[0008] [4] In the loading platform lifting device of the above [2], the inner part includes a cylindrical inner column extending in the vertical direction and moving vertically with respect to the column, the loading platform lifting device includes a slider disposed across the inside and outside of the inner column and moving vertically with respect to the inner column, the loading platform is connected to the slider, and the second cover material is fixed to the lower part of the inner column. Such a configuration may be adopted.

[0009] [5] In the loading platform lifting device of the above [2], The inner part includes a slider that is disposed across the inside and outside of the support column and moves vertically with respect to the support column. The load receiving platform is connected to the slider. The second cover member is fixed to the lower part of the slider. Such a configuration may be adopted.

[0010] [6] In any one of the load receiving platform lifting devices of the above [1] to [4], The inner part includes a cylindrical inner column that extends vertically and moves vertically with respect to the support column. The load receiving platform lifting device includes a slider that is disposed across the inside and outside of the inner column and moves vertically with respect to the inner column. The load receiving platform is connected to the slider. The lower cover portion includes a cover member fixed to the lower part of the inner column. Such a configuration may be adopted.

[0011] [7] In any one of the load receiving platform lifting devices of the above [1] to [3] and [5], The inner part includes a slider that is disposed across the inside and outside of the support column and moves vertically with respect to the support column. The load receiving platform is connected to the slider. The lower cover portion includes a cover member fixed to the lower part of the slider. Such a configuration may be adopted.

[0012] [8] Any one of the load receiving platform lifting devices of the above [1] to [7] includes a lifting unit having the support column, the inner part, and the load receiving platform, and a reversing mechanism that reverses the lifting unit about a horizontal axis between a use position where the load receiving platform is used and a non-use position where the load receiving platform is not used. Such a configuration may be adopted.

[0013] [9] The vehicle includes any one of the loading platform lifting devices [1] to [8] above, and a loading platform to which the loading platform lifting device is attached.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Embodiments for Carrying Out the Invention

[0015] In each drawing, the dimensions of the components may be enlarged or reduced with respect to the actual dimensions for ease of understanding, for example, and the dimensional ratios between the drawings may not match. In addition, in each drawing, a part of the components may be omitted for ease of understanding, for example.

[0016] Terms including ordinal numbers such as first, second, etc. are used to describe various components, but this term is used only for the purpose of distinguishing one component from another, and the components are not particularly limited by this term. Note that the number of components including ordinal numbers is not particularly limited, and may be, for example, one. Also, the ordinal numbers used in the following specification and drawings may be different from those described in the claims.

[0017] Also, in the following description, the first direction (first lateral direction) D1 is also referred to as the front-rear direction D1. In the first direction D1, the direction of the arrow in the figure is the front direction, and the direction opposite to the direction of the arrow in the figure is the rear direction. Also, the second direction (second lateral direction) D2 is also referred to as the left-right direction D2. In the second direction D2, the direction of the arrow in the figure is the left direction, and the direction opposite to the direction of the arrow in the figure is the right direction.

[0018] Further, the third direction D3 is also referred to as the vertical direction D3. Among the third direction D3, the arrow direction in each figure is defined as the upward direction, and the direction opposite to the arrow direction in each figure is defined as the downward direction. That is, each of the directions D1 to D3 is defined as the direction seen from a person (driver) sitting in the driver's seat of the vehicle.

[0019] Hereinafter, an embodiment of the vehicle and the loading platform lifting device will be described with reference to FIGS. 1 to 13. Note that the following embodiments are exemplified to assist in understanding the configuration and the like of the vehicle and the loading platform lifting device, and do not limit the configuration of the vehicle and the loading platform lifting device.

[0020] As shown in FIG. 1, the vehicle 1 may include, for example, a vehicle body 2, a loading platform 3 fixed on a vehicle body frame 2a disposed at the rear end of the vehicle body 2, and a loading platform lifting device 4 attached to the loading platform 3. The vehicle 1 is not particularly limited, but may be, for example, a cargo vehicle as in the present embodiment.

[0021] The loading platform 3 may include, for example, a floor portion 3a, a pair of side walls 3b, 3b respectively provided on both left and right sides of the floor portion 3a, and a shutter 3c rotatably connected to the rear end portion of the floor portion 3a about the left - right direction D2. In the present embodiment, the loading platform 3 is open at the top, but is not limited to such a configuration, and may be, for example, a box - shaped (specifically, a loading box) having a ceiling and closed at the top.

[0022] The floor portion 3a includes, for example, a loading platform floor surface 3d on which goods are loaded. Thereby, the space above the loading platform floor surface 3d becomes a loading space for goods. Further, the shutter 3c may be rotatable, for example, between an open position (the position shown in FIG. 1) hanging downward from the floor portion 3a of the loading platform 3 and a closed position (not shown) rising upward from the floor portion 3a of the loading platform 3.

[0023] The load receiving platform lifting device 4 is used, for example, when loading and unloading goods from the rear of the loading platform 3 onto the loading platform floor surface 3d of the loading platform 3. And the load receiving platform lifting device 4 may include, for example, a vertically lifting type lifting unit 5 and a mounting unit 6 for mounting the lifting unit 5 on the loading platform 3 as in this embodiment.

[0024] The lifting unit 5 may include, for example, as in this embodiment, a pair of cylindrical columns (hereinafter also referred to as "outer columns") 7, 7 extending in the vertical direction D3, cylindrical inner columns 8, 8 extending in the vertical direction D3, inserted into the outer columns 7, and moving in the vertical direction D3 with respect to the outer columns 7, and a cylindrical cross member 9 extending in the left-right direction D2 and connecting the pair of outer columns 7, 7.

[0025] In this embodiment, the outer column 7 is provided with a column slit (hereinafter also referred to as "outer slit") 7b extending in the vertical direction D3 on the rear wall 7a, and the inner column 8 is provided with an inner slit 8b extending in the vertical direction D3 on the rear wall 8a. And the outer slit 7b and the inner slit 8b communicate with each other in the front-rear direction D1 (see FIG. 13).

[0026] The lifting unit 5 may include, for example, as in this embodiment, a slider 10 moving in the vertical direction D3 with respect to the outer column 7 and the inner column 8, and a load receiving platform 11 connected to the slider 10. The slider 10 is disposed across the inside and outside of the outer column 7 and the inner column 8 by inserting through the outer slit 7b and the inner slit 8b.

[0027] Thereby, as shown in FIGS. 1 and 2, the load receiving platform 11 can move in the vertical direction D3 between the lower end position (see FIG. 1) and the upper end position (see FIG. 2). At this time, the slider 10 and the load receiving platform 11 move integrally with the inner column 8 in the vertical direction D3 with respect to the outer column 7, or the slider 10 and the load receiving platform 11 move in the vertical direction D3 with respect to the inner column 8 and the outer column 7.

[0028] The load receiving table 11 may include, for example, as in this embodiment, a first plate 11a rotatably connected to the slider 10 and a second plate 11b rotatably connected to the first plate 11a. Thus, as shown in FIGS. 1 to 3, the load receiving table 11 can be deformed between a load receiving posture (see FIGS. 1 and 2) in which the first and second plates 11a and 11b are deployed and extend along the front-rear direction D1, and a storage posture (see FIG. 3) in which the first and second plates 11a and 11b are folded and extend along the vertical direction D3.

[0029] The mounting unit 6 may include, for example, as in this embodiment, a base portion 12 placed on the floor portion 3a of the loading platform 3, a lock pin 13 (see FIGS. 7 and 8) for fixing the base portion 12 to the floor portion 3a of the loading platform 3, a reversing mechanism 14 for reversing the lifting unit 5 about the left-right direction D2, and a rotating mechanism 15 for rotating the lifting unit 5 and the base portion 12 about the vertical direction D3.

[0030] As shown in FIGS. 7 and 8, the lock pin 13 may fix the base portion 12 to the floor portion 3a of the loading platform 3, for example, as in this embodiment, by sandwiching the base portion 12 and the floor portion 3a of the loading platform 3 in the vertical direction D3. And the lock pin 13 may be detachable from, for example, the base portion 12 and the floor portion 3a of the loading platform 3. Thereby, the base portion 12 can be switched between a fixed state fixed to the floor portion 3a of the loading platform 3 and a movable state movable with respect to the floor portion 3a of the loading platform 3.

[0031] Returning to FIGS. 1 to 4, the reversing mechanism 14 connects the lifting unit 5 and the base portion 12, for example, as in this embodiment, so that the lifting unit 5 can rotate about the left-right direction D2 with respect to the base portion 12. Thus, as shown in FIGS. 3 and 4, the lifting unit 5 can be reversed about the left-right direction D2 between a use position (see FIGS. 1 to 3) where the load receiving table 11 is used and a non-use position (see FIG. 4) where the load receiving table 11 is not used.

[0032] And as shown in FIGS. 1 to 3, when the lifting unit 5 is in the use position, a part of the outer column 7 is disposed below the loading platform floor surface 3d. On the contrary, as shown in FIG. 4, when the lifting unit 5 is in the non-use position, the entire outer column 7 is disposed above the loading platform floor surface 3d. Specifically, when the lifting unit 5 is in the non-use position, the entire load receiving platform lifting device 4 is placed on the loading platform floor surface 3d.

[0033] Note that the up and down directions of the lifting unit 5 are opposite between the use position and the non-use position. Also, the inversion mechanism 14 may invert the lifting unit 5, for example, by manual force (e.g., turning the handle 14a), or may invert the lifting unit 5 by a drive source (e.g., a motor), for example.

[0034] The rotation mechanism 15 is fixed to the floor portion 3a of the loading platform 3 as in the present embodiment, for example, and connects the base portion 12 and the floor portion 3a of the loading platform 3 so that the base portion 12 can rotate about the vertical direction D3 with respect to the floor portion 3a of the loading platform 3. Thereby, as shown in FIGS. 4 and 5, the lifting unit 5 can rotate about the vertical direction D3 between the non-use position (see FIG. 4) and the storage position (see FIG. 5).

[0035] Note that when the lifting unit 5 is in the non-use position, the cross member 9 is arranged to extend in the left-right direction D2, and when the lifting unit 5 is in the storage position, the cross member 9 is arranged to extend in the front-rear direction D1. Also, the rotation mechanism 15 may rotate the base portion 12 and the lifting unit 5 by manual force, for example, or may rotate the base portion 12 and the lifting unit 5 by a drive source (e.g., a motor), for example.

[0036] In this way, the lifting unit 5 can move to the use position (see FIGS. 1 to 3), the non-use position (see FIG. 4), and the storage position (see FIG. 5), respectively. In this specification, unless otherwise specified, the front-rear direction D1 (front, rear, forward, backward), the left-right direction D2 (left, right, leftward, rightward), and the up-down direction D3 (upward, downward, upward, downward) are the directions D1 to D3 when the lifting unit 5 is in the use position.

[0037] As shown in FIGS. 6 to 8, the lifting unit 5 may include, for example, a rope (not shown) with the first end fixed inside the cross member 9 and the second end fixed to the upper end of the slider 10, an upper sheave 21, a lower sheave 22, and a fixed sheave 23 that are wound around the rope and fixed so that the position of the rotation axis is stationary, a moving sheave 24 whose rotation axis position moves, a drive source (for example, a cylinder that can expand and contract in the left-right direction D2) 16, and a control unit 17 that controls each part of the lifting unit 5 (for example, the drive source 16, etc.).

[0038] Thereby, when the control unit 17 controls the drive source 16 and the drive source 16 moves the moving sheave 24 in the left-right direction D2, the slider 10 moves in the up-down direction D3. Therefore, the slider 10 and the load receiving base 11 move integrally with the inner column 8 in the up-down direction D3 with respect to the outer column 7, or the slider 10 and the load receiving base 11 move in the up-down direction D3 with respect to the inner column 8 and the outer column 7.

[0039] The upper sheave 21 may be configured to be arranged inside and at the upper part of the outer column 7 and rotatable about the left-right direction D2, for example, as in this embodiment. The lower sheave 22 may be configured to be arranged inside the outer column 7 and the cross member 9 and at the lower part of the outer column 7 and rotatable about the front-rear direction D1, for example, as in this embodiment.

[0040] The fixed sheave 23 may be configured to be disposed inside the cross member 9 and rotatable about the front-rear direction D1, for example, as in the present embodiment. The movable sheave 24 may be configured to be disposed inside the cross member 9 and rotatable about the front-rear direction D1, for example, as in the present embodiment.

[0041] Further, the lifting unit 5 may include, for example, as in the present embodiment, a first guide roller 25 that guides the outer peripheral surface of the inner column 8, a second guide roller 26 that is guided by the inner peripheral surface of the outer column 7, and third guide rollers 27, 27 that are guided by the inner peripheral surface of the inner column 8.

[0042] The first guide roller 25 may be configured to be disposed inside and at the lower part of the outer column 7 and outside the inner column 8, for example, as in the present embodiment. Further, the first guide roller 25 may be configured to be rotatably connected to the outer column 7 about the left-right direction D2 and fixed so that the position of the rotation axis remains stationary, for example, as in the present embodiment.

[0043] The second guide roller 26 may be configured to be disposed inside the outer column 7 and connected to the upper end of the inner column 8, for example, as in the present embodiment. Further, the second guide roller 26 may be configured to be rotatably connected to the inner column 8 about the left-right direction D2 and the position of the rotation axis moves as the inner column 8 moves, for example, as in the present embodiment. And the second guide roller 26 is guided by the inner peripheral surface of the rear wall 7a of the outer column 7.

[0044] The third guide rollers 27, 27 may be configured to be disposed inside the inner column 8 and connected to the slider 10, for example, as in the present embodiment. Further, the third guide rollers 27, 27 may be configured to be rotatably connected to the slider 10 about the left-right direction D2 and the position of the rotation axis moves as the slider 10 moves, for example, as in the present embodiment.

[0045] And the third guide roller 27 is guided by the inner peripheral surface of the inner column 8. Specifically, in the present embodiment, the upper third guide roller 27 is guided by the inner peripheral surface of the rear wall 8a of the inner column 8, and the lower third guide roller 27 is guided by the inner peripheral surface of the front wall 8c of the inner column 8.

[0046] Further, the lifting unit 5 may include, for example, an upper cover portion 30 (see also FIGS. 1 to 3) that covers the upper opening of the outer column 7 from above as in the present embodiment. Thereby, it is possible to suppress dust from entering the inside of the outer column 7 by the upper cover portion 30. Note that the upper cover portion 30 may overlap the entire upper opening of the outer column 7 in the vertical direction D3 view as in the present embodiment, for example.

[0047] As shown in FIGS. 9 and 10, the lifting unit 5 may include, for example, a grease nipple 28 connected to the first guide roller 25 in order to supply grease to the first guide roller 25. Note that the present invention is not limited to such a configuration. For example, the first guide roller 25 may be a guide roller that does not require the supply of grease. Further, FIG. 9 (the same applies to FIGS. 12 and 14 to 17) illustrates the outer column 7 and the inner column 8 on the right side among the pair of outer columns 7, 7 and inner columns 8, 8.

[0048] As shown in FIGS. 9 to 11, the lifting unit 5 may include, for example, a stopper portion 31 fixed to the outer column 7 and a stopper portion 32 (see also FIG. 1) fixed to the inner column 8 and abutted against the stopper portion 31 in the vertical direction D3. Thereby, the load receiving table 11 is held at the upper end position when the stopper portion 31 abuts against the stopper portion 32 from above.

[0049] As shown in FIGS. 9 and 10, the outer column 7 may include, for example, a front cylinder portion 7c formed in a cylindrical shape and a rear cylinder portion 7d formed in a cylindrical shape and connected to the rear of the front cylinder portion 7c. And the front cylinder portion 7c and the rear cylinder portion 7d may be formed in a square cylindrical shape, for example, respectively.

[0050] As a result, the outer column 7 includes a front wall 7e, a rear wall 7a, a left wall 7f, and a right wall 7g. Specifically, the front wall 7e is constituted by the front wall of the front cylindrical portion 7c, the rear wall 7a is constituted by the rear wall of the rear cylindrical portion 7d, the left wall 7f is constituted by the left wall of the front cylindrical portion 7c and the rear cylindrical portion 7d, and the right wall 7g is constituted by the right wall of the front cylindrical portion 7c and the rear cylindrical portion 7d.

[0051] Although not particularly limited, the outer column 7 may include, for example, a partition wall 7i that divides the interior in the front-rear direction D1. Note that the partition wall 7i may be constituted by, for example, the front wall of the rear cylindrical portion 7d as in the present embodiment. Further, in the present embodiment, the partition wall 7i is cut away as necessary (for example, at the position of the first guide roller 25).

[0052] As shown in FIGS. 9 and 11, the inner column 8 may be formed, for example, in a square tube shape. As a result, the inner column 8 includes a front wall 8c, a rear wall 8a, a left wall 8d, and a right wall 8e.

[0053] And the inner column 8 may be inserted, for example, into one side (rear side) in the lateral direction (front-rear direction) D1. Specifically, the inner column 8 may be inserted into the rear cylindrical portion 7d of the outer column 7 as in the present embodiment. Note that the inner column 8 and the second guide roller 26 (see FIGS. 7 and 8) are inserted into the outer column 7 and constitute an inner portion 18 that moves in the vertical direction D3 with respect to the outer column 7.

[0054] The first guide roller 25 may be disposed, for example, on the other side (front side) in the lateral direction (front-rear direction) D1 than the inner column 8 as in the present embodiment. As a result, the first guide roller 25 guides the outer peripheral surface of the front wall 8c of the inner column 8. Further, the first guide roller 25 may be disposed, for example, at the lowest position among the rotators 21, 22, 25, 26 that are disposed inside the outer column 7 and outside the inner column 8 as in the present embodiment (see FIGS. 7 and 8).

[0055] As shown in FIGS. 9 to 13, the elevating unit 5 may include, for example, a lower cover portion 33 that covers the lower opening 7h of the outer column 7 from below as in the present embodiment. The lower cover portion 33 may include, for example, as in the present embodiment, a first cover member 34 fixed to the outer column 7, and a second cover member 35 and a third cover member 36 fixed to the inner column 8.

[0056] The third cover member 36 may be disposed, for example, as in the present embodiment, below the outer column 7 and may overlap a part of the lower opening 7h of the outer column 7 and a part of the lower opening 8f of the inner column 8 in a view in the vertical direction D3. Further, the third cover member 36 may be disposed, for example, as in the present embodiment, below the third guide roller 27 (see FIGS. 7 and 8) and may overlap a part of the third guide roller 27 in a view in the vertical direction D3.

[0057] The third cover member 36 may be configured to be detachable from the inner column 8 and fixed to the lower part of the inner column 8 by a screw member 37 or the like, for example, as in the present embodiment. Note that the present invention is not limited to such a configuration. For example, the third cover member 36 may be fixed to the lower part of the inner column 8 by welding or the like and may be non-detachable from the inner column 8.

[0058] The first cover member 34 may be disposed, for example, as in the present embodiment, below the outer column 7 and may overlap a part of the lower opening 7h of the outer column 7 in a view in the vertical direction D3. Further, the first cover member 34 may be disposed, for example, as in the present embodiment, below the first guide roller 25 and may overlap a part of the first guide roller 25 in a view in the vertical direction D3.

[0059] The first cover member 34 may be configured to be detachable from the outer column 7 and fixed to the lower part of the outer column 7 by a screw member 38 or the like, for example, as in the present embodiment. Note that the present invention is not limited to such a configuration. For example, the first cover member 34 may be fixed to the lower part of the outer column 7 by welding or the like and may be non-detachable from the outer column 7.

[0060] The second cover member 35 may be disposed below the outer column 7 and may overlap a part of the lower opening 7h of the outer column 7 in a view in the vertical direction D3, for example, as in the present embodiment. Further, the second cover member 35 may be disposed below the first guide roller 25 and may overlap a part of the first guide roller 25 in a view in the vertical direction D3, for example, as in the present embodiment. Although not particularly limited, in the present embodiment, the second cover member 35 constitutes a part of the portion to be stopped 32.

[0061] The second cover member 35 may be configured to be fixed to the lower portion of the inner column 8 by welding or the like and be non-detachable from the inner column 8, for example, as in the present embodiment. Note that the present invention is not limited to such a configuration. For example, the second cover member 35 may be detachable from the inner column 8 and may be fixed to the lower portion of the inner column 8 by a screw member or the like.

[0062] Then, as shown in FIG. 13, the lower cover portion 33 overlaps the entire first guide roller 25 in a view in the vertical direction D3 by the first cover member 34 and the second cover member 35. Specifically, the lower cover portion 33 overlaps the entire outer peripheral surface of the first guide roller 25 that contacts the inner column 8 (inner portion 18) in a view in the vertical direction D3 by the first cover member 34 and the second cover member 35.

[0063] Thereby, it is possible to suppress the intrusion of dust from below toward the first guide roller 25 inside the outer column 7 by the first cover member 34 and the second cover member 35. Therefore, for example, it is possible to suppress the adhesion of dust to the first guide roller 25, so that the guiding of the inner column 8 by the first guide roller 25 can be made smooth. Further, for example, when grease leaks from the first guide roller 25, the lower cover portion 33 can receive the grease.

[0064] Incidentally, the inner column 8 is inserted into one side (rear side) in the lateral direction (front-rear direction) D1. On the other hand, the first cover material 34 and the second cover material 35 are continuously arranged in the lateral direction (front-rear direction) D1 from the other side (front side) end in the lateral direction (front-rear direction) D1 of the lower opening 7h of the outer column 7 to the front wall 8c of the inner column 8 in a view in the vertical direction D3. Thereby, the first cover material 34 and the second cover material 35 can suppress dust from entering the inside of the outer column 7 from below.

[0065] Note that while the first cover material 34 is fixed to the outer column 7, the second cover material 35 moves in the vertical direction D3 with respect to the outer column 7. Thereby, the first cover material 34 can always suppress dust from entering the inside of the outer column 7, while the second cover material 35 can suppress dust from entering the inside of the outer column 7 when the inner part 18 (inner column 8) is located at the upper end position with respect to the outer column 7.

[0066] Therefore, for example, as in the present embodiment, between the front side end of the lower opening 7h of the outer column 7 and the front wall 8c of the inner column 8, the length W1 in the front-rear direction D1 of the first cover material 34 may be longer than the length W2 in the front-rear direction D1 of the second cover material 35. Thereby, for example, it is possible to effectively suppress dust from entering the inside of the outer column 7 from below.

[0067] Further, when the load receiving base 11 is located at the upper end position, that is, when the inner column 8 is located at the upper end position with respect to the outer column 7 as shown in FIG. 12, the distance W3 in the vertical direction D3 between the second cover material 35 and the outer column 7 is preferably small. Although not particularly limited, the distance W3 may be, for example, 100 mm or less, and preferably, for example, 50 mm or less, and more preferably, for example, 20 mm or less.

[0068] Note that, for example, when the distance W3 is zero as in this embodiment, that is, when the inner column 8 is located at the upper end position with respect to the outer column 7, the second cover member 35 may be in contact with the lower end of the outer column 7. Thereby, for example, it is possible to effectively suppress the intrusion of dust into the outer column 7 from below.

[0069] Note that at least one of the stopper portion 31 and the portion to be stopped 32 may include an elastic portion (for example, rubber, spring) that can be elastically deformed in the vertical direction D3. And, for example, when the inner column 8 is located at the upper end position with respect to the outer column 7, the second cover member 35 may be in contact with the lower end of the outer column 7 in a state where the elastic portion is elastically deformed in the vertical direction D3.

[0070] According to such a configuration, after the inner column 8 rises with respect to the outer column 7 and the stopper portion 31 hits the portion to be stopped 32, the elastic portion elastically deforms in the vertical direction D3, so that the second cover member 35 comes into contact with the lower end of the outer column 7. Thereby, the impact when the second cover member 35 hits the lower end of the outer column 7 can be reduced.

[0071] As described above, when the lifting unit 5 is located at the use position (see also FIGS. 1 to 3), the lower cover portion 33 can suppress the intrusion of dust from the lower end of the outer column 7 into the inside. On the other hand, when the load receiving platform lifting device 4 is not used, since the lifting unit 5 is reversed by the reversing mechanism 14, the lifting unit 5 is located at the non-use position (see FIG. 4).

[0072] As shown in FIG. 4, when the lifting unit 5 is located at the non-use position, the lower opening 7h of the outer column 7 is located at the upper end, and the lower cover portion 33 is disposed above the outer column 7 and the first guide roller 25 (not shown in FIG. 4). Thereby, when the lifting unit 5 is located at the non-use position, since the lower cover portion 33 covers the lower opening 7h from above, the lower cover portion 33 can suppress the intrusion of dust from the upper end of the outer column 7 into the inside.

[0073] As described above, the load receiving platform lifting device 4, as in this embodiment, a cylindrical column 7 extending in the vertical direction D3, an inner part 18 inserted into the column 7 and moving in the vertical direction D3 with respect to the column 7, a guide roller (in this embodiment, the first guide roller) 25 disposed inside the column 7 and at the lower part of the column 7 for guiding the inner part 18, a load receiving platform 11 moving in the vertical direction D3 with respect to the column 7, a lower cover part 33 disposed below the guide roller 25 and overlapping at least a part (in this embodiment, the whole) of the guide roller 25 in the vertical direction D3 view, and is preferably configured as such.

[0074] According to such a configuration, with respect to the guide roller (in this embodiment, the first guide roller) 25 being disposed inside the column 7 and at the lower part of the column 7, the lower cover part 33 is disposed below the guide roller 25 and overlaps at least a part (in this embodiment, the whole) of the guide roller 25 in the vertical direction D3 view. Thereby, the lower cover part 33 can suppress dust from entering the inside of the column 7.

[0075] Also, in the load receiving platform lifting device 4, as in this embodiment, the lower cover part 33 a first cover material 34 fixed to the lower part of the column 7 and overlapping a part of the guide roller (in this embodiment, the first guide roller) 25 in the vertical direction D3 view, a second cover material 35 fixed to the lower part of the inner part 18 and overlapping a part of the guide roller 25 in the vertical direction D3 view so as to overlap the whole of the guide roller 25 in the vertical direction D3 view with the first cover material 34, and is preferably configured as such.

[0076] According to such a configuration, the lower cover portion 33 overlaps the entire guide roller (the first guide roller in this embodiment) 25 in the vertical direction D3 view by the first cover member 34 fixed to the lower portion of the column 7 and the second cover member 35 fixed to the lower portion of the inner portion 18. Thereby, it is possible to suppress the intrusion of dust toward the guide roller 25.

[0077] Also, the load receiving table lifting device 4, as in this embodiment, a cylindrical column 7 extending in the vertical direction D3, an inner portion 18 inserted into one side (the rear side in this embodiment) of the lateral direction D1 (the front-rear direction in this embodiment) of the column 7 and moving in the vertical direction D3 with respect to the column 7, a load receiving table 11 moving in the vertical direction D3 with respect to the column 7, a lower cover portion 33 disposed below the column 7 and overlapping at least a part (a part in this embodiment) of the lower opening 7h of the column 7 in the vertical direction D3 view, and the lower cover portion 33 is continuously arranged in the lateral direction D1 from at least the other side (the front side in this embodiment) end of the lower opening 7h of the column 7 in the lateral direction D1 to the inner portion 18 in the vertical direction D3 view, such a configuration is preferable.

[0078] According to such a configuration, with respect to the inner portion 18 being inserted into one side (the rear side in this embodiment) of the lateral direction D1 (the front-rear direction in this embodiment) of the column 7, the lower cover portion 33 is continuously arranged in the lateral direction D1 from the other side (the front side in this embodiment) end of the lower opening 7h of the column 7 to the inner portion 18 in the vertical direction D3 view. Thereby, it is possible to suppress the intrusion of dust into the inside of the column 7 by the lower cover portion 33.

[0079] Also, in the load receiving table lifting device 4, as in this embodiment, the inner portion 18 includes a cylindrical inner column 8 extending in the vertical direction D3 and moving in the vertical direction D3 with respect to the column 7, The load receiving platform lifting device 4 includes a slider 10 that is disposed across the inside and outside of the inner column 8 and moves in the vertical direction D3 with respect to the inner column 8. The load receiving platform 11 is connected to the slider 10. The second cover member 35 is fixed to the lower part of the inner column 8. Such a configuration may be adopted.

[0080] According to such a configuration, the lower cover portion 33 overlaps the entire guide roller (in this embodiment, the first guide roller) 25 in the vertical direction D3 view by the first cover member 34 fixed to the lower part of the support column 7 and the second cover member 35 fixed to the lower part of the inner column 8. Thereby, it is possible to suppress the intrusion of dust toward the guide roller 25.

[0081] Also, in the load receiving platform lifting device 4, as in this embodiment, The inner portion 18 includes a cylindrical inner column 8 that extends in the vertical direction D3 and moves in the vertical direction D3 with respect to the support column 7. The load receiving platform lifting device 4 includes a slider 10 that is disposed across the inside and outside of the inner column 8 and moves in the vertical direction D3 with respect to the inner column 8. The load receiving platform 11 is connected to the slider 10. The lower cover portion 33 includes a cover member (in this embodiment, the second cover member) 35 fixed to the lower part of the inner column 8. Such a configuration is preferable.

[0082] According to such a configuration, the cover member (in this embodiment, the second cover member) 35 is fixed to the lower part of the inner column 8. Thereby, when the inner column 8 is located at the upper end position with respect to the support column 7, it is possible to suppress the intrusion of dust into the support column 7 by the cover member 35.

[0083] Also, the load receiving platform lifting device 4, as in this embodiment, a lifting unit 5 having the support column 7, the inner portion 18, and the load receiving platform 11 a reversing mechanism 14 for reversing the lifting unit 5 about the lateral direction D2 between a use position where the load receiving table 11 is used and a non-use position where the load receiving table 11 is not used; Such a configuration is preferable.

[0084] According to such a configuration, when the lifting unit 5 is located at the use position, the lower cover portion 33 can suppress dust from entering the inside from the lower end of the support column 7. On the other hand, when the lifting unit 5 is located at the non-use position, the lower cover portion 33 can suppress dust from entering the inside from the upper end of the support column 7.

[0085] Also, the vehicle 1 is, as in the present embodiment, the above-described load receiving table lifting device 4, a loading platform 3 to which the load receiving table lifting device 4 is attached; Such a configuration is preferable.

[0086] According to such a configuration, it is possible to suppress dust from entering the inside of the support column 7.

[0087] Note that the vehicle 1 and the load receiving table lifting device 4 are not limited to the configurations of the above-described embodiment, nor are they limited to the above-described operational effects. Also, the vehicle 1 and the load receiving table lifting device 4 can of course be variously modified within a range not departing from the gist of the present invention. For example, it is of course possible to arbitrarily select one or more of the configurations and methods according to the following various modification examples and adopt them in the configurations and methods according to the above-described embodiment.

[0088] (A) In the load receiving platform lifting device 4 according to the above embodiment, the lower cover portion 33 is configured such that the first cover member 34 and the second cover member 35 overlap the entire first guide roller 25 in the vertical direction D3 view. Further, the lower cover portion 33 is configured such that the first cover member 34 and the second cover member 35 are continuously arranged in the lateral direction D1 from the front side end of the lower opening 7h of the column 7 to the inner portion 18 in the vertical direction D3 view. However, the load receiving platform lifting device 4 is not limited to such a configuration.

[0089] (A-1) For example, the lower cover portion 33 may be provided with a cover member fixed to the lower portion of the inner column 8 (inner portion 18), and the cover member may be configured to overlap the entire first guide roller 25 in the vertical direction D3 view. Further, for example, the lower cover portion 33 may be provided with a cover member fixed to the lower portion of the inner column 8 (inner portion 18), and the cover member may be configured to be continuously arranged in the lateral direction D1 from the front side end of the lower opening 7h of the column 7 to the inner portion 18 in the vertical direction D3 view.

[0090] Although not particularly limited, as an example of such a configuration, for example, the lower cover portion 33 may have the configuration shown in FIG. 14. The cover member 33a of the lower cover portion 33 according to FIG. 14 is disposed below the guide roller 25 and overlaps the entire guide roller 25 in the vertical direction D3 view. Further, the cover member 33a of the lower cover portion 33 according to FIG. 14 is continuously arranged in the lateral direction (front-rear direction) D1 from the other side (front side) end of the lower opening 7h in the lateral direction (front-rear direction) D1 to the inner column 8 (inner portion 18) in the vertical direction D3 view.

[0091] Thus, in the load receiving platform lifting device 4, for example, as shown in FIG. 14, The inner portion 18 includes a cylindrical inner column 8 that extends in the vertical direction D3 and moves in the vertical direction D3 with respect to the column 7, The load receiving platform lifting device 4 includes a slider 10 (not shown in FIG. 14) that is disposed across the inside and outside of the inner column 8 and moves in the vertical direction D3 with respect to the inner column 8, The load receiving table 11 (not shown in FIG. 14) is connected to the slider 10, The lower cover portion 33 includes a cover material 33a fixed to the lower portion of the inner column 8. Such a configuration may be used.

[0092] According to such a configuration, the cover material 33a is fixed to the lower portion of the inner column 8. Thereby, when the inner column 8 is located at the upper end position with respect to the support column 7, it is possible to suppress the intrusion of dust into the support column 7 by the cover material 33a.

[0093] (A-2) Further, for example, the lower cover portion 33 may include a cover material fixed to the lower portion of the slider 10 (inner portion 18), and the cover material may overlap the entire first guide roller 25 when viewed in the vertical direction D3. Further, for example, the lower cover portion 33 may include a cover material fixed to the lower portion of the slider 10 (inner portion 18), and the cover material may be continuously arranged in the lateral direction D1 from the front side end of the lower opening 7h of the support column 7 to the inner portion 18 when viewed in the vertical direction D3.

[0094] Although not particularly limited, as an example of such a configuration, for example, the lower cover portion 33 may have the configuration shown in FIG. 15. The cover material 33b of the lower cover portion 33 according to FIG. 15 is disposed below the guide roller 25 and overlaps the entire guide roller 25 when viewed in the vertical direction D3. Further, the cover material 33b of the lower cover portion 33 according to FIG. 15 is continuously arranged in the lateral direction (front-rear direction) D1 from the other side (front side) end of the lower opening 7h in the lateral direction (front-rear direction) D1 to the slider 10 (inner portion 18) when viewed in the vertical direction D3.

[0095] Thus, in the load receiving table lifting device 4, for example, as shown in FIG. 15, The inner portion 18 includes a slider 10 that is disposed across the inside and outside of the support column 7 and moves in the vertical direction D3 with respect to the support column 7. The load receiving table 11 is connected to the slider 10. The lower cover portion 33 includes a cover material 33b fixed to the lower part of the slider 10. Such a configuration may be used.

[0096] According to such a configuration, the cover material 33b is fixed to the lower part of the slider 10. Thereby, when the slider 10 is located at the upper end position with respect to the support column 7, it is possible to suppress dust from entering the inside of the support column 7 by the cover material 33b.

[0097] (A-3) Further, for example, the lower cover portion 33 may include a cover material fixed to the lower part of the outer column 7, and the cover material may overlap the entire first guide roller 25 in a view in the vertical direction D3. Further, for example, the lower cover portion 33 may include a cover material fixed to the lower part of the outer column 7, and the cover material may be continuously arranged in the front-rear direction D1 from the front-side end of the lower opening 7h to the inner column 7 (inner portion 18) in a view in the vertical direction D3. In such a configuration, for example, the rear-side end of the cover material is preferably formed of a material having a small coefficient of friction with respect to the inner column 7 (inner portion 18) because it is in sliding contact with the inner column 7 (inner portion 18).

[0098] (A-4) Further, for example, the lower cover portion 33 may include a first cover material fixed to the lower part of the outer column 7 and a second cover material fixed to the lower part of the slider 10, and the lower cover portion 33 may overlap the entire first guide roller 25 in a view in the vertical direction D3 by the first cover material and the second cover material. Further, for example, the lower cover portion 33 may include a first cover material fixed to the lower part of the outer column 7 and a second cover material fixed to the lower part of the slider 10, and the lower cover portion 33 may be continuously arranged in the front-rear direction D1 from the front-side end of the lower opening 7h to the slider 10 (inner portion 18) in a view in the vertical direction D3 by the first cover material and the second cover material.

[0099] Although not particularly limited, as an example of such a configuration, for example, the lower cover portion 33 may have the configuration shown in FIG. 16. The lower cover portion 33 according to FIG. 16 includes a first cover material 34 fixed to the lower part of the outer column 7 and a second cover material 35 fixed to the lower part of the slider 10.

[0100] The lower cover portion 33 according to FIG. 16 overlaps the entire guide roller 25 in the vertical direction D3 view by the first cover material 34 and the second cover material 35. Further, the lower cover portion 33 according to FIG. 16 is continuously arranged in the lateral direction (front-rear direction) D1 from the other side (front side) end of the lower opening 7h in the lateral direction (front-rear direction) D1 to the slider 10 (inner portion 18) in the vertical direction D3 view by the first cover material 34 and the second cover material 35.

[0101] Thus, in the load receiving platform lifting device 4, for example, as shown in FIG. 16, the lower cover portion 33 a first cover material 34 fixed to the lower part of the column 7 and overlapping a part of the guide roller (the first guide roller in FIG. 16) 25 in the vertical direction D3 view, a second cover material 35 fixed to the lower part of the inner portion 18 and overlapping a part of the guide roller 25 in the vertical direction D3 view so as to overlap the entire guide roller 25 in the vertical direction D3 view together with the first cover material 34, may have such a configuration.

[0102] According to such a configuration, the lower cover portion 33 overlaps the entire guide roller (the first guide roller in this embodiment) 25 in the vertical direction D3 view by the first cover material 34 fixed to the lower part of the column 7 and the second cover material 35 fixed to the lower part of the inner portion 18. Thereby, it is possible to suppress the intrusion of dust toward the guide roller 25.

[0103] Also, in the load receiving platform lifting device 4, for example, as shown in FIG. 16, The inner part 18 is disposed across the inside and outside of the support column 7 and includes a slider 10 that moves in the vertical direction D3 with respect to the support column 7. The load receiving base 11 is connected to the slider 10. The second cover member 35 is fixed to the lower part of the slider 10. Such a configuration may be adopted.

[0104] According to such a configuration, the lower cover portion 33 overlaps the entire guide roller (in this embodiment, the first guide roller) 25 in the vertical direction D3 view by the first cover member 34 fixed to the lower part of the support column 7 and the second cover member 35 fixed to the lower part of the slider 10. Thereby, it is possible to suppress the intrusion of dust toward the guide roller 25.

[0105] Further, in the load receiving base lifting device 4, for example, as shown in FIG. 16, The inner part 18 is disposed across the inside and outside of the support column 7 and includes a slider 10 that moves in the vertical direction D3 with respect to the support column 7. The load receiving base 11 is connected to the slider 10. The lower cover portion 33 includes a cover member (in FIG. 16, the second cover member) 35 fixed to the lower part of the slider 10. Such a configuration may be adopted.

[0106] According to such a configuration, the cover member (in this embodiment, the second cover member) 35 is fixed to the lower part of the slider 10. Thereby, when the slider 10 is located at the upper end position with respect to the support column 7, it is possible to suppress the intrusion of dust into the support column 7 by the cover member 35.

[0107] (B) Further, the load receiving base lifting device 4 according to the above embodiment includes an inner column 8, that is, the inner part 18 includes the inner column 8 and the second guide roller 26. And the first guide roller 25 that guides the inner part 18 guides the inner column 8. However, the load receiving base lifting device 4 is not limited to such a configuration.

[0108] For example, the load receiving platform lifting device 4 may be configured not to include the inner column 8. Although not particularly limited, as an example of such a configuration, the load receiving platform lifting device 4 may have, for example, the configuration shown in FIG. 15, or may have, for example, the configuration shown in FIG. 16. The load receiving platform lifting device 4 according to FIGS. 15 and 16 does not include the inner column 8, and the inner part 18 is configured to include the slider 10. In such a configuration, the first guide roller 25 that guides the inner part 18 guides the slider 10. Thus, the inner part 18 includes either the inner column 8 or the slider 10.

[0109] (C) Also, in the load receiving platform lifting device 4 according to the above embodiment, the lower cover part 33 is arranged below the support column 7 and overlaps a part of the lower opening 7h of the support column 7 in the vertical direction D3 view. However, the load receiving platform lifting device 4 is not limited to such a configuration.

[0110] For example, the lower cover part 33 may be arranged below the support column 7 and overlap the entire lower opening 7h of the support column 7 in the vertical direction D3 view. Although not particularly limited, as an example of such a configuration, the load receiving platform lifting device 4 may have the configuration shown in FIG. 17. In the load receiving platform lifting device 4 according to FIG. 17, the cover part 33 is arranged below the support column 7 and includes a cover member 33c rotatably connected to the support column 7, and the lifting unit 5 includes an elastic part 39 that connects the support column 7 and the cover member 33c in order to apply an elastic restoring force to the cover member 33c.

[0111] Thereby, as shown in FIG. 17(a), when the inner part 18 (inner column 8) is located at the upper end position, the cover member 33c covers the entire lower opening 7h of the support column 7 from below. On the other hand, as shown in FIG. 17(b), when the inner part 18 (inner column 8) is located below the upper end position, the elastic part 39 elastically deforms, causing the cover member 33c to rotate, so that the cover member 33c opens the lower opening 7h of the support column 7.

[0112] (D) Further, the load receiving platform lifting device 4 according to the above embodiment has a configuration in which a first guide roller 25 that is disposed inside and at the lower part of the outer column (support column) 7 and guides the inner part 18 is provided. However, the load receiving platform lifting device 4 is not limited to such a configuration. For example, the load receiving platform lifting device 4 may have a configuration in which a guide roller that is disposed inside the outer column 7 and guides the inner part 18 is not provided.

[0113] (E) Further, in the load receiving platform lifting device 4 according to the above embodiment, the lower cover part 33 is disposed below the first guide roller 25 and overlaps the entire first guide roller 25 in a view in the vertical direction D3. However, the load receiving platform lifting device 4 is not limited to such a configuration.

[0114] For example, the lower cover part 33 may have a configuration in which it is disposed below the first guide roller 25 and overlaps a part of the first guide roller 25 in a view in the vertical direction D3. As an example of such a configuration, for example, the lower cover part 33 may have a configuration in which it includes the first cover material 34 but does not include the second cover material 35, and also, for example, the lower cover part 33 may have a configuration in which it includes the second cover material 35 but does not include the first cover material 34. Further, the lower cover part 33 may include the third cover material 36 as in the above embodiment, and also, for example, it may not include the third cover material 36.

[0115] (F) Further, in the load receiving platform lifting device 4 according to the above embodiment, the lower cover part 33 has a configuration in which it is continuously disposed in the lateral direction (front - rear direction) D1 from the other side (front side) end of the lower opening 7h in the lateral direction (front - rear direction) D1 to the inner part 18 in a view in the vertical direction D3. However, the load receiving platform lifting device 4 is not limited to such a configuration. For example, the lower cover part 33 may have a configuration in which it is disposed only in a part between the other side end of the lower opening 7h in the lateral direction D1 and the inner part 18 in a view in the vertical direction D3.

[0116] (G) Further, in the load receiving platform lifting device 4 according to the above embodiment, the inner portion 18 is inserted into the rear side of the column 7, and the lower cover portion 33 is continuously arranged in the front-rear direction D1 from the front side end of the lower opening 7h to the inner portion 18 in the view in the vertical direction D3. However, the load receiving platform lifting device 4 is not limited to such a configuration.

[0117] For example, the inner portion 18 may be inserted into the front side of the column 7, and the lower cover portion 33 may be continuously arranged in the front-rear direction D1 from the rear side end of the lower opening 7h to the inner portion 18 in the view in the vertical direction D3. Also, for example, the inner portion 18 may be inserted into one side in the left-right direction D2 of the column 7, and the lower cover portion 33 may be continuously arranged in the left-right direction D2 from the other side end in the left-right direction D2 of the lower opening 7h to the inner portion 18 in the view in the vertical direction D3.

[0118] (H) Further, in the load receiving platform lifting device 4 according to the above embodiment, the outer column 7 is composed of two cylindrical portions, the front cylindrical portion 7c and the rear cylindrical portion 7d, and the outer column 7 is provided with a partition wall 7i that partitions the inside in the front-rear direction D1. However, the load receiving platform lifting device 4 is not limited to such a configuration.

[0119] For example, among the pair of outer columns 7, at least one of the outer columns 7 may be composed of one cylindrical portion, and the outer column 7 may not be provided with a partition wall 7i that partitions the inside in the lateral directions D1 and D2. And in such a configuration, for example, the inner portion 18 may be inserted into one side (for example, the rear side, the front side, the left side, the right side) in the lateral directions D1 and D2 of the outer column 7.

[0120] (I) Further, the load receiving platform lifting device 4 according to the above embodiment is configured to include a pair (two) of the columns 7 and the inner portions 18 respectively. However, the load receiving platform lifting device 4 is not limited to such a configuration. For example, it may be configured to include one column 7 and one inner portion 18 respectively.

[0121] (J) Further, in the load receiving platform lifting device 4 according to the above embodiment, the lifting unit 5 includes a rope, sheaves 21 to 24, and a drive source (a cylinder capable of expanding and contracting in the left-right direction D2) 16 disposed inside the cross member 9. The drive source 16 moves the movable sheave 24 in the left-right direction D2, so that the slider 10 moves in the up-down direction D3. However, the load receiving platform lifting device 4 is not limited to such a configuration.

[0122] For example, the drive source (expandable and contractible cylinder) may be disposed inside the support column 7, and the slider 10 may be connected to the drive source. According to such a configuration, when the drive source expands and contracts in the up-down direction D3, the slider 10 moves in the up-down direction D3.

[0123] (K) Further, in the load receiving platform lifting device 4 according to the above embodiment, since the lifting unit 5 can be moved to the use position, non-use position, and storage position by the inversion mechanism 14 and the rotation mechanism 15, the outer column 7 is configured to be movable relative to the load platform 3. However, the load receiving platform lifting device 4 is not limited to such a configuration.

[0124] For example, the outer column 7 may be fixedly and immovably attached to the load platform 3. Specifically, the load receiving platform lifting device 4 may be configured not to include the inversion mechanism 14 and the rotation mechanism 15. In such a configuration, for example, at least one of the support column 7 and the cross member 9 may be fixed to the load platform 3 by welding, fastening means (bolts and nuts), or the like.

[0125] Also, for example, the base portion 12 may be fixedly and immovably attached to the load platform 3, and the lifting unit 5 may be capable of inverting between the use position and the non-use position. Specifically, the load receiving platform lifting device 4 may be configured to include the inversion mechanism 14 while not including the rotation mechanism 15. In such a configuration, for example, the base portion 12 may be fixed to the load platform 3 by welding, fastening means (bolts and nuts), or the like.

[0126] (L) Further, in the vehicle 1 according to the above embodiment, the loading platform lifting device 4 is configured to be directly attached to the loading platform 3. However, the loading platform lifting device 4 is not limited to such a configuration. For example, the loading platform lifting device 4 may be configured to be indirectly attached to the loading platform 3 by being attached to the vehicle body 2.

[0127] (M) Note that, for example, in the methods and apparatuses shown in the claims, the specification, and the drawings, the execution order of each step such as operations, procedures, steps, and stages can be realized in any order as long as the result of the previous step is not used in the subsequent step. For example, even if described using "first", "next", etc. for convenience, it does not mean that it is essential to execute in this order.

Description of Reference Numerals

[0128] 1... vehicle, 2... vehicle body, 2a... vehicle body frame, 3... loading platform, 3a... floor part, 3b... side wall, 3c... sliding door, 3d... loading platform floor surface, 4... loading platform lifting device, 5... lifting unit, 6... mounting unit, 7... column (outer column), 7a... rear wall, 7b... column slit (outer slit), 7c... front cylinder part, 7d... rear cylinder part, 7e... front wall, 7f... left wall, 7g... right wall, 7h... lower opening, 7i... partition wall, 8... inner column, 8a... rear wall, 8b... inner slit, 8c... front wall, 8d... left wall, 8e... right wall, 8f... lower opening, 9... cross member, 10... slider, 11... loading receptacle, 11a... first plate, 11b... second plate, 12... base part, 13... lock pin, 14... inversion mechanism, 14a... handle, 15... rotation mechanism, 16... drive source, 17... control unit, 18... inner part, 21... upper sheave, 22... lower sheave, 23... fixed sheave, 24... moving sheave, 25... first guide roller, 26... second guide roller, 27... third guide roller, 28... grease nipple, 30... upper cover part, 31... abutting part, 32... part to be abutted, 33... lower cover part, 33a... cover material, 33b... cover material, 33c... cover material, 34... first cover material, 35... second cover material, 36... third cover material, 37... screw material, 38... screw material, 39... elastic part, D1... front-rear direction (first lateral direction), D2... left-right direction (second lateral direction), D3... up-down direction

Claims

1. A cylindrical support column extending in the vertical direction, An inner part inserted into the support column and moving vertically with respect to the support column, A guide roller disposed inside the support column and at the lower part of the support column for guiding the inner part, A load receiving platform moving vertically with respect to the support column, A load receiving platform lifting device, comprising a lower cover portion disposed below the guide roller and overlapping at least a part of the guide roller in a vertical view.

2. The lower cover portion, A first cover member fixed to the lower part of the support column and overlapping a part of the guide roller in a vertical view, A second cover member fixed to the lower part of the inner part and overlapping a part of the guide roller in a vertical view so as to overlap the entire guide roller in a vertical view with the first cover member. The load receiving platform lifting device according to claim 1.

3. A cylindrical support column extending in the vertical direction, An inner part inserted into one side in the lateral direction of the support column and moving vertically with respect to the support column, A load receiving platform moving vertically with respect to the support column, A lower cover portion disposed below the support column and overlapping at least a part of the lower opening of the support column in a vertical view, The lower cover portion is continuously arranged in the lateral direction at least from the other lateral side end of the lower opening to the inner part in a vertical view. The load receiving platform lifting device.

4. The inner part includes a cylindrical inner column extending in the vertical direction and moving vertically with respect to the support column, The load receiving platform lifting device includes a slider disposed across the inside and outside of the inner column and moving vertically with respect to the inner column, The load receiving platform is connected to the slider, The second cover member is fixed to the lower part of the inner column. The load receiving platform lifting device according to claim 2.

5. The inner part includes a slider disposed across the inside and outside of the support column and moving vertically with respect to the support column, The load receiving platform is connected to the slider, The second cover member is fixed to the lower part of the slider. The load receiving platform lifting device according to claim 2.

6. The inner part includes a cylindrical inner column extending in the vertical direction and moving vertically with respect to the support column, The load receiving platform lifting device includes a slider disposed across the inside and outside of the inner column and moving vertically with respect to the inner column, The load receiving platform is connected to the slider, The load receiving platform lifting device according to claim 1 or 3, wherein the lower cover portion includes a cover material fixed to the lower portion of the inner column.

7. The inner portion includes a slider that is disposed across the inside and outside of the column and moves in the vertical direction with respect to the column. The load receiving platform is connected to the slider. The load receiving platform lifting device according to claim 1 or 3, wherein the lower cover portion includes a cover material fixed to the lower portion of the slider.

8. A lifting unit having the column, the inner portion, and the load receiving platform; A load receiving platform lifting device according to any one of claims 1 to 5, further comprising an inversion mechanism that inverts the lifting unit about a lateral axis between a use position where the load receiving platform is used and a non-use position where the load receiving platform is not used.

9. A vehicle comprising the load receiving platform lifting device according to any one of claims 1 to 5; And a loading platform to which the load receiving platform lifting device is attached.

Images