Load-receiving platform lifting device and vehicle
Patent Information
- Application Number
- JP2023129998
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-08-09
- Publication Date
- 2025-02-21
Smart Images
Figure 2025025326000001_ABST
Abstract
Description
[Technical field]
[0001] The present invention relates to a platform lifting device and a vehicle. [Background technology]
[0002] Patent Document 1 describes a load-receiving platform lifting device that is integrally mounted on a vehicle by a pair of left and right lifting pillars that are fixed to both left and right sides of the rear end surface of a load box.
[0003] Incidentally, there is a demand for the loading platform lifting device to be able to be turned upside down, for example, when the vehicle is traveling, etc. However, if the pair of left and right lifting columns are structured to be able to be turned upside down, there is a risk that the part supporting the reversing shaft, which is turned upside down, may be damaged by the load of the loading platform lifting device. [Prior art documents] [Patent documents]
[0004] [Patent Document 1] Patent No. 5451116 Summary of the Invention [Problem to be solved by the invention]
[0005] Therefore, an object of the present invention is to provide a loading platform lifting device and a vehicle that can prevent damage to the bracket supporting the reversing axis. [Means for solving the problem]
[0006] The loading platform lifting device according to the present invention is A loading platform lifting device that is attached to a loading platform of a vehicle, A pair of cylindrical first columns extending in the vertical direction; A pair of inversion support parts fixed to the loading platform; an inversion mechanism that connects the first column and the inversion support part so that the first column can be inverted up and down with respect to the inversion support part; The reversing mechanism includes a bracket fixed to the first column and an reversing shaft rotatably connecting the bracket and the reversing support part, the bracket includes a shaft support portion that supports the inversion shaft on one side of the first column in the front-rear direction, and a side plate portion that extends from the shaft support portion toward the other side in the front-rear direction and is fixed to a side surface of the first column, The side plate portion extends beyond the center of the side surface of the first column in the front-rear direction.
[0007] In addition, the vehicle according to the present invention is The loading platform lifting device; and a loading platform to which the loading platform lifting device is attached. [Brief description of the drawings]
[0008] [Figure 1] FIG. 2 is a perspective view of the load receiving platform lifting device according to the embodiment, showing a state in which the lifting unit is located at the use position and the load receiving platform is located at the lower end position in the load receiving posture. [Diagram 2] FIG. 2 is a perspective view of the load receiving platform lifting / lowering device according to the embodiment, illustrating a state in which the lifting unit is located at the use position and the load receiving platform is located at the upper end position in the load receiving posture. [Diagram 3] FIG. 2 is a perspective view of the load receiving platform lifting / lowering device according to the embodiment, illustrating a state in which the lifting unit is located at the use position and the load receiving platform is in the storage position; [Figure 4] FIG. 2 is a perspective view of the loading platform lifting / lowering device according to the embodiment, showing a state in which the lifting / lowering unit is located in an unused position; [Diagram 5] FIG. 2 is a perspective view of the loading platform lifting / lowering device according to the embodiment, showing a state in which the lifting / lowering unit is located at a storage position. [Figure 6] FIG. 13 is a perspective view of the loading platform lifting device according to the embodiment, as viewed from another direction. [Figure 7] FIG. 2 is a right-side view of the load-receiving platform lifting device according to the embodiment, showing a state in which the load-receiving platform is positioned at the bottom end position in the load-receiving posture. [Figure 8] 8 is a cross-sectional view of a main part taken along line VIII-VIII in FIG. 7. [Figure 9] FIG. 9 is a cross-sectional view of a main part taken at the same position as FIG. 8 according to another embodiment. [Figure 10] FIG. 13 is a right-side view of a bracket according to another embodiment. [Figure 11] FIG. 13 is a right-side view of a bracket according to another embodiment. [Figure 12] FIG. 13 is a right-side view of a bracket according to another embodiment. [Figure 13] FIG. 13 is a right-side view of a bracket according to another embodiment. [Figure 14] FIG. 13 is a right-side view of a bracket according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0009] In each drawing, the dimensions of the components may be enlarged or reduced relative to the actual dimensions in order to facilitate understanding, and the dimensional ratios between the drawings may not be consistent. Note that in each drawing, some of the components may be omitted in order to facilitate understanding.
[0010] Terms including ordinal numbers such as first, second, etc. are used to describe various components, but these terms are used only for the purpose of distinguishing one component from another, and the components are not particularly limited by these terms. The number of components including ordinal numbers is not particularly limited, and may be, for example, one. In addition, the ordinal numbers used in the following specification and drawings may differ from the ordinal numbers described in the claims.
[0011] In the following description, the first direction (first horizontal direction) D1 is also called the front-rear direction D1, and the direction of the arrow in the figure is the front direction, and the direction opposite to the arrow in the figure is the rear direction. The second direction (second horizontal direction) D2 is also called the left-right direction D2, and the direction of the arrow in the figure is the left direction, and the direction opposite to the arrow in the figure is the right direction.
[0012] The third direction D3 is also called the up-down direction D3, and the direction of the arrow in each drawing is the up direction, and the direction opposite to the arrow in each drawing is the down direction. That is, each of the directions D1 to D3 is a direction seen by a person (driver) sitting in the driver's seat of the vehicle.
[0013] Hereinafter, an embodiment of the vehicle and the loading platform lifting / lowering device will be described with reference to Figures 1 to 8. Note that the following embodiment is provided as an example to aid in understanding the configurations of the vehicle and the loading platform lifting / lowering device, and is not intended to limit the configurations of the vehicle and the loading platform lifting / lowering device.
[0014] 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, and may be, for example, a loading vehicle as in this embodiment.
[0015] The loading platform 3 may include, for example, a floor 3a, a pair of side walls 3b, 3b provided on both the left and right sides of the floor 3a, and a gate 3c connected to the rear end of the floor 3a so as to be rotatable about an axis in the left-right direction D2, as in this embodiment. The loading platform 3 is open at the top in this embodiment, but is not limited to such a configuration and may be, for example, a box-like shape (specifically, a cargo box) having a ceiling and closed at the top.
[0016] The floor portion 3a has, for example, a loading platform floor surface 3d on which luggage is loaded. As a result, the space above the loading platform floor surface 3d becomes a loading space for luggage. The gate 3c may be rotatable between, for example, an open position (position shown in FIG. 1) where the gate 3c hangs downward from the floor portion 3a of the loading platform 3 and a closed position (not shown) where the gate 3c rises upward from the floor portion 3a of the loading platform 3.
[0017] The loading platform lifting device 4 is used, for example, when loading and unloading luggage from the rear of the loading platform 3 onto the loading platform floor surface 3d of the loading platform 3. The loading platform lifting device 4 may include, for example, a vertical lifting type lifting unit 5 and an attachment unit 6 for attaching the lifting unit 5 to the loading platform 3, as in this embodiment.
[0018] The lifting unit 5 may, for example, as in this embodiment, include a pair of cylindrical 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 relative 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.
[0019] In this embodiment, the outer column 7 has an outer slit 7b extending in the up-down direction D3 in its rear wall 7a, and the inner column 8 has an inner slit 8b extending in the up-down direction D3 in its rear wall 8a. The outer slit 7b and the inner slit 8b communicate with each other in the front-rear direction D1 (see FIG. 8).
[0020] The lifting unit 5 may, for example, as in this embodiment, include a slider 10 that moves in the vertical direction D3 relative 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 being inserted through the outer slit 7b and the inner slit 8b.
[0021] 1 and 2, the load receiving platform 11 can move in the vertical direction D3 between a lower end position (see FIG. 1) and an upper end position (see FIG. 2). At this time, the slider 10 moves in the vertical direction D3 relative to the inner column 8, the slider 10 and the inner column 8 move integrally in the vertical direction D3 relative to the outer column 7, or the slider 10 moves in the vertical direction D3 relative to the inner column 8 and the outer column 7.
[0022] The load receiving platform 11 may include, for example, a first plate 11a rotatably connected to the slider 10, and a second plate 11b rotatably connected to the first plate 11a, as in this embodiment. As a result, as shown in Figures 1 to 3, the load receiving platform 11 is deformable between a load receiving position (see Figures 1 and 2) in which the first and second plates 11a and 11b are unfolded and move along the front-rear direction D1, and a storage position (see Figure 3) in which the first and second plates 11a and 11b are folded and move along the up-down direction D3.
[0023] The mounting unit 6 may, for example, as in this embodiment, include a base portion 12 placed on the floor portion 3a of the loading platform 3, a lock pin 13 (see Figures 6 and 7) that fixes the base portion 12 to the floor portion 3a of the loading platform 3, an inversion mechanism 14 that inverts the lifting unit 5 around an axis in the left-right direction D2, and a rotation mechanism 15 that rotates the lifting unit 5 and the base portion 12 around an axis in the up-down direction D3.
[0024] 6 and 7, the lock pin 13 may, for example, fix the base portion 12 to the floor portion 3a of the loading platform 3 by sandwiching the base portion 12 and the floor portion 3a of the loading platform 3 in the up-down direction D3 as in this embodiment. The lock pin 13 may, for example, be detachable from the base portion 12 and the floor portion 3a of the loading platform 3. This allows the base portion 12 to be switched between a fixed state in which it is fixed to the floor portion 3a of the loading platform 3 and a movable state in which it is movable relative to the floor portion 3a of the loading platform 3.
[0025] 1 to 4, for example, as in this embodiment, the reversing mechanism 14 connects the lifting unit 5 to the base part 12 so that the lifting unit 5 is rotatable with respect to the base part 12. This allows the lifting unit 5 to be reversed between a use position (see Figs. 1 to 3) in which the load receiving platform 11 is used and a non-use position (see Fig. 4) in which the load receiving platform 11 is not used, as shown in Figs. 3 and 4.
[0026] The up and down of the lifting unit 5 is reversed between the use position and the non-use position. The reversing mechanism 14 may, for example, reverse the lifting unit 5 by manual force (for example, by turning the handle 14a), or may, for example, reverse the lifting unit 5 by a drive source (for example, a motor).
[0027] For example, as in this embodiment, the rotation mechanism 15 is fixed to the floor 3a of the loading platform 3 and connects the base part 12 to the floor part 3a of the loading platform 3 so that the base part 12 is rotatable on the floor part 3a of the loading platform 3. This allows the lifting unit 5 to rotate between a non-use position (see FIG. 4) and a storage position (see FIG. 5), as shown in FIG. 4 and FIG. 5.
[0028] When the lifting unit 5 is in the unused position, the cross member 9 is disposed so as to extend in the left-right direction D2, and when the lifting unit 5 is in the stored position, the cross member 9 is disposed so as to extend in the front-rear direction D1. The rotation mechanism 15 may rotate the base part 12 and the lifting unit 5 by, for example, human power, or may rotate the base part 12 and the lifting unit 5 by, for example, a drive source (for example, a motor).
[0029] In this way, the lifting unit 5 can be moved to a use position (see Figs. 1 to 3), a non-use position (see Fig. 4), and a storage position (see Fig. 5). In this specification, unless otherwise specified, the front-rear direction D1 (front, rear, front, rear), the left-right direction D2 (left, right, left, right), and the up-down direction D3 (up, down, up, down) are the directions D1 to D3 when the lifting unit 5 is located at the use position.
[0030] As shown in FIG. 6, the base portion 12 may include a pair of inversion support portions 21, 21 and a connecting plate portion 22 connecting the pair of inversion support portions 21, 21.
[0031] The pair of reversible support parts 21, 21 respectively support the pair of outer columns 7, 7 in a reversible manner. The reversible support part 21 includes a bottom plate 211, a reinforcing plate 212, and a pair of support plates 213, 213. The lower surface of the bottom plate 211 is placed on the loading platform floor surface 3d of the floor part 3a.
[0032] The reinforcing plate 212 is made of an L-shaped plate member in a side view, and includes a horizontal plate portion 212a extending in the front-rear direction D1 and a vertical plate portion 212b extending in the up-down direction D3. The horizontal plate portion 212a is fixed to the upper surface of the bottom plate 211 by welding or the like. The vertical plate portion 212b extends upward from the rear end of the horizontal plate portion 212a. The pair of support plates 213, 213 are each made of a plate member formed into a substantially triangular shape. The pair of support plates 213, 213 are fixed to the upper surface of the horizontal plate portion 212a and the front surface of the vertical plate portion 212b by welding or the like, with a gap between them in the left-right direction D2. The pair of support plates 213, 213 rotatably support the inversion shaft 17 described later.
[0033] The reversing mechanism 14 includes a bracket 16 fixed to the outer column 7 and a reversing shaft 17 connecting the bracket 16 and a reversing support portion 21 .
[0034] Incidentally, as shown in Fig. 8, the outer column 7 may include a first hollow member 71 having a C-shaped cross section and a second hollow member 72 having a U-shaped cross section. The first hollow member 71 and the second hollow member 72 are disposed adjacent to each other in the front-rear direction D1, and the second hollow member 72 is closer to the inversion shaft 17 than the first hollow member 71. The first hollow member 71 and the second hollow member 72 are fixed to each other by welding or the like. The thickness of the first hollow member 71 is greater than the thickness of the second hollow member 72. Also, the second hollow member 72 may have a longer length in the front-rear direction D1 than the first hollow member 71. An inner column 8 is inserted into the first hollow member 71.
[0035] The first hollow member 71 has a width in the left-right direction D2 wider than that of the second hollow member 72. The first hollow member 71 and the second hollow member 72 are fixed so that their inner surfaces in the left-right direction D2 (the side surfaces on the cross member 9 side) are flush with each other. Therefore, the outer surface of the first hollow member 71 (the side surface opposite the cross member 9) protrudes outward beyond the outer surface of the second hollow member 72.
[0036] The bracket 16 is fixed to the outer column 7. The bracket 16 includes a shaft support portion 16a and a pair of side plate portions 16b, 16c. The shaft support portion 16a and the pair of side plate portions 16b, 16c may be formed integrally.
[0037] The shaft support portion 16a is formed of, for example, a channel material, as shown in Fig. 6. The shaft support portion 16a supports the reversing shaft 17 immovably. Therefore, the bracket 16 rotates together with the reversing shaft 17. The reversing shaft 17 is rotatably supported by a pair of support plates 213, 213, whereby the bracket 16 rotates with respect to the reversing support portion 21.
[0038] The pair of side plate portions 16b, 16c are plate members extending rearward from the shaft support portion 16a. The pair of side plate portions 16b, 16c sandwich the outer column 7 in the left-right direction D2. The pair of side plate portions 16b, 16c are fixed to both the left and right side surfaces of the outer column 7 by welding or the like.
[0039] As shown in FIG. 8, the pair of side plate portions 16b, 16c extend beyond the center 7c in the front-rear direction D1 of the side of the outer column 7. This distributes the stress applied to the bracket 16 when the outer column 7 is inverted around the inversion shaft 17, making it possible to suppress damage to the bracket 16. Note that the "center" of the side of the outer column 7 in the front-rear direction D1 does not mean the exact center of the side of the outer column 7 in the front-rear direction D1, but may be approximately the center. For example, the "center" of the side of the outer column 7 in the front-rear direction D1 is in the range of 40 to 60% of the length from the front edge to the rear edge of the side of the outer column 7. In addition, the "center" of the side of the outer column 7 in the front-rear direction D1 also includes the connection portion between the first hollow member 71 and the second hollow member 72.
[0040] The pair of side plate portions 16b, 16c include, for example, an inner plate portion 16b and an outer plate portion 16c. The inner plate portion 16b is fixed to the inner surface of the outer column 7, and the outer plate portion 16c is fixed to the outer surface of the outer column 7. As shown in Fig. 6, the inner plate portion 16b is a pentagonal plate member, and the outer plate portion 16c is a trapezoidal plate member.
[0041] As shown in Fig. 8, the inner plate portion 16b extends beyond the side surface of the second hollow member 72 and reaches the side surface of the first hollow member 71. Since the first hollow member 71 is thicker than the second hollow member 72, by extending and fixing the inner plate portion 16b to the side surface of the first hollow member 71, damage to the bracket 16 and the outer column 7 can be suppressed. On the other hand, the outer plate portion 16c extends to the front surface of the first hollow member 71 and does not reach the side surface of the first hollow member 71, as shown in Fig. 8.
[0042] The pair of side plate portions 16b, 16c have a width in the up-down direction D3 that is wider than that of the shaft support portion 16a. Also, the pair of side plate portions 16b, 16c are formed so that the width increases with increasing distance from the shaft support portion 16a in a side view (as viewed in the left-right direction D2) (see Figs. 6 and 7). This allows the stress acting on the bracket 16 to be effectively dispersed.
[0043] [1] As described above, the loading platform lifting / lowering device 4 in this embodiment is as follows: A loading platform lifting device 4 attached to a loading platform 3 of a vehicle 1, A pair of cylindrical first columns (in this embodiment, outer columns) 7, 7 extending in the up-down direction D3; A pair of inversion support parts 21, 21 fixed to the loading platform 3; an inversion mechanism 14 that connects the first column 7 and the inversion support portion 21 so that the first column 7 can be inverted up and down with respect to the inversion support portion 21; The reversing mechanism 14 includes a bracket 16 fixed to the first column 7, and an reversing shaft 17 rotatably connecting the bracket 16 and the reversing support portion 21, The bracket 16 includes a shaft support portion 16a that supports the reversing shaft 17 on one side (the front side in this embodiment) of the first column 7 in the front-rear direction D1, and side plate portions 16b and 16c that extend from the shaft support portion 16a toward the other side (the rear side in this embodiment) in the front-rear direction D1 and are fixed to side surfaces of the first column 7. The side plate portions 16b, 16c extend beyond the center 7c of the side surface of the first column 7 in the front-rear direction D1. This configuration is preferred.
[0044] According to such a configuration, when the first column 7 is turned around the reversing shaft 17, the stress acting on the bracket 16 is dispersed, so that damage to the bracket 16 supporting the reversing shaft 17 can be suppressed.
[0045] [2] In addition, in the loading platform lifting device 4 described above in [1], as in this embodiment, The vehicle is provided with a pair of second columns (inner columns in this embodiment) 8, 8 that rise and fall inside the pair of first columns (outer columns in this embodiment) 7, 7, The first column 7 includes a first hollow member 71 into which the second column 8 is inserted, and a second hollow member 72 adjacent to the first hollow member 71 and closer to the reversal shaft 17 than the first hollow member 71, The side plate portion (inner plate portion in this embodiment) 16b extends beyond the side surface of the second hollow member 72 and reaches the side surface of the first hollow member 71. This configuration is preferred.
[0046] According to this configuration, when the first column 7 is turned around the turning shaft 17, the stress acting on the bracket 16 can be further dispersed.
[0047] [3] In addition, in the loading platform lifting device 4 of the above [1] or [2], as in this embodiment, The side plate portions 16b and 16c become wider as they move away from the shaft support portion 16a. This configuration is preferred.
[0048] According to this configuration, when the first column 7 is turned around the turning shaft 17, the stress applied to the bracket 16 can be effectively dispersed.
[0049] [4] The vehicle 1 further includes any one of the load-receiving platform lifting devices 4 described above in [1] to [3], The loading platform 3 on which the loading platform lifting device 4 is attached is provided. This configuration is preferred.
[0050] According to this configuration, damage to the bracket 16 supporting the reversing shaft 17 can be suppressed.
[0051] The vehicle 1 and the loading platform lifting device 4 are not limited to the configurations of the above-mentioned embodiment, and are not limited to the above-mentioned effects. Of course, the vehicle 1 and the loading platform lifting device 4 can be modified in various ways without 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 of the various modified examples described below and adopt them in the configurations and methods of the above-mentioned embodiment.
[0052] (A) The load receiving platform lifting device 4 according to the above embodiment includes a pair of inner columns 8, 8 that rise and fall inside the pair of outer columns 7, 7, and the outer column 7 includes a first hollow member 71 into which the inner column 8 is inserted, and a second hollow member 72 that is adjacent to the first hollow member 71 and is closer to the inversion shaft 17 than the first hollow member 71, and the inner plate portion 16b reaches the side surface of the first hollow member 71 beyond the side surface of the second hollow member 72. However, the load receiving platform lifting device 4 is not limited to such a configuration. For example, the load receiving platform lifting device 4 does not need to include a pair of inner columns 8. In this case, the slider 10 rises and falls directly inside the first hollow member 71 of the outer column 7. Also, the outer column 7 may be configured of one hollow member instead of the two hollow members of the first hollow member 71 and the second hollow member 72.
[0053] In addition, in the load-receiving platform lifting device 4 according to the above embodiment, only the inner plate portion 16b of the side plate portions 16b, 16c extends beyond the side surface of the second hollow member 72 to reach the side surface of the first hollow member 71. However, the load-receiving platform lifting device 4 is not limited to such a configuration. For example, both side plate portions 16b, 16c may extend beyond the side surface of the second hollow member 72 to reach the side surface of the first hollow member 71. Both side plate portions 16b, 16c may extend to the same position in the front-rear direction D1, or may extend to different positions. In addition, it is preferable that the side plate portions 16b, 16c extend to the rear end of the outer column 7. In the load receiving platform lifting device 4 according to the above embodiment, when the outer plate portion 16c passes over the side surface of the second hollow member 72 and reaches the side surface of the first hollow member 71, the outer surface of the first hollow member 71 protrudes outward further than the outer surface of the second hollow member 72, so that the outer plate portion 16c may be configured to be bent so as to follow the outer surface of the first hollow member 71 and the outer surface of the second hollow member 72, as shown in Figure 9. Alternatively, the outer surface of the second hollow member 72 may protrude outward beyond the outer surface of the first hollow member 71, and the outer plate portion 16c may be bent so as to follow the outer surface of the first hollow member 71 and the outer surface of the second hollow member 72. Alternatively, one of the inner surface of the first hollow member 71 and the inner surface of the second hollow member 72 may protrude inward beyond the other, and the inner plate portion 16b may be bent so as to follow the inner surface of the first hollow member 71 and the inner surface of the second hollow member 72.
[0054] In the loading platform lifting device 4 according to the above embodiment, the first hollow member 71 is configured to have a width in the left-right direction D2 that is wider than that of the second hollow member 72. However, the loading platform lifting device 4 is not limited to this configuration. The first hollow member 71 may be configured to have the same width in the left-right direction D2 as the second hollow member 72.
[0055] (B) In the load-receiving platform lifting device 4 according to the above embodiment, the side plate portions 16b, 16c are configured to become wider as they move away from the shaft support portion 16a. However, the load-receiving platform lifting device 4 is not limited to this configuration. For example, the side plate portions 16b, 16c may be configured to extend with a constant width in the front-rear direction D1. Also, the side plate portions 16b, 16c may be configured to include a portion that becomes wider as it moves away from the shaft support portion 16a and a portion that extends with a constant width in the front-rear direction D1.
[0056] (C) In the load receiving platform lifting device 4 according to the above embodiment, the inner plate portion 16b is a pentagonal plate member, and the outer plate portion 16c is a trapezoidal plate member. However, the load receiving platform lifting device 4 is not limited to this configuration. The inner plate portion 16b may be a trapezoidal plate member. Also, the outer plate portion 16c may be a pentagonal plate member. The inner plate portion 16b and the outer plate portion 16c may be the same shape and size, or may be different shapes and sizes. For example, the inner plate portion 16b may have a shape as shown in Figs. 10 to 14. In the example shown in Fig. 10, the inner plate portion 16b has a substantially constant width on the side surface of the second hollow member 72, and becomes wider as it moves away from the shaft support portion 16a on the side surface of the first hollow member 71. In the example shown in Fig. 11, the inner plate portion 16b becomes wider as it moves away from the shaft support portion 16a on the side surface of the second hollow member 72, and has a substantially constant width on the side surface of the first hollow member 71. In the example shown in Fig. 12, the inner plate portion 16b has a shape that is upside down from the example shown in Fig. 11. Specifically, the inner plate portion 16b shown in Fig. 11 is wider downward on the side surface of the second hollow member 72, but the inner plate portion 16b shown in Fig. 12 is wider upward on the side surface of the second hollow member 72. In the example shown in Fig. 13, the inner plate portion 16b widens upward and downward as it moves away from the shaft support portion 16a on the side surface of the second hollow member 72, and has a substantially constant width on the side surface of the first hollow member 71. In the example shown in Fig. 14, the inner plate portion 16b does not gradually become wider as it moves away from the shaft support portion 16a, but rather becomes wider immediately as it moves away from the shaft support portion 16a. The outer plate portion 16c may also have the same shape as the inner plate portion 16b shown in Figs. 10 to 14.
[0057] (D) In the loading platform lifting / lowering device 4 according to the above embodiment, the bracket 16 is configured to include the inner plate portion 16b and the outer plate portion 16c. However, the loading platform lifting / lowering device 4 is not limited to this configuration. For example, the bracket 16 may be configured to include only one of the inner plate portion 16b and the outer plate portion 16c.
[0058] (E) In the loading platform lifting device 4 according to the above embodiment, the reversing shaft 17 is fixedly supported by the bracket 16 and rotatably supported by the reversing support portion 21. However, the loading platform lifting device 4 is not limited to this configuration. For example, the reversing shaft 17 may be fixedly supported by the reversing support portion 21 and rotatably supported by the bracket 16.
[0059] (F) In addition, in the load receiving platform lifting device 4 according to the above embodiment, the lifting unit 5 is movable between an in-use position, an unused position, and a stored position, and therefore the outer column 7 is configured to be movable relative to the load receiving platform 3. However, the load receiving platform lifting device 4 is not limited to this configuration. For example, the outer column 7 may be configured to be immovably fixed to the load receiving platform 3.
[0060] (G) In the vehicle 1 according to the above embodiment, the loading platform lifting / lowering device 4 is configured to be directly attached to the loading platform 3. However, the loading platform lifting / lowering device 4 is not limited to this configuration. For example, the loading platform lifting / lowering device 4 may be configured to be indirectly attached to the loading platform 3 by being attached to the vehicle body 2.
[0061] (H) In addition, in the loading platform lifting device 4 according to the above embodiment, the lifting unit 5 is configured to be of a vertical lifting type. However, the loading platform lifting device 4 is not limited to such a configuration. For example, the lifting unit 5 may be configured to be of a link type (parallel link type). [Explanation of symbols]
[0062] Reference Signs List 1...vehicle, 2...vehicle body, 2a...vehicle frame, 3...loading platform, 3a...floor, 3b...side wall, 3c...gateway, 3d...loading platform floor, 4...loading platform lifting device, 5...lifting unit, 6...mounting unit, 7...outer column, 7a...rear wall, 7b...outer slit, 7c...center in fore-aft direction, 8...inner column, 8a...rear wall, 8b...inner slit, 9...cross member, 10...slider, 11...loading platform, 11a...first plate, 11b...second plate , 12...base portion, 13...lock pin, 14...inversion mechanism, 14a...handle, 15...rotation mechanism, 16...bracket, 16a...shaft support portion, 16b...inner plate portion, 16c...outer plate portion, 17...inversion shaft, 21...inversion support portion, 22...connecting plate portion, 71...first hollow member, 72...second hollow member, 211...bottom plate, 212...reinforcing plate, 212a...horizontal plate portion, 212b...vertical plate portion, 213...support plate, D1...front-rear direction, D2...left-right direction, D3...up-down direction
Claims
1. A loading platform lifting device that is attached to a loading platform of a vehicle, A pair of cylindrical first columns extending in the vertical direction; A pair of inversion support parts fixed to the loading platform; an inversion mechanism that connects the first column and the inversion support part so that the first column can be inverted up and down with respect to the inversion support part; The reversing mechanism includes a bracket fixed to the first column and an reversing shaft rotatably connecting the bracket and the reversing support part, the bracket includes a shaft support portion that supports the inversion shaft on one side of the first column in the front-rear direction, and a side plate portion that extends from the shaft support portion toward the other side in the front-rear direction and is fixed to a side surface of the first column, A load-receiving platform lifting device, wherein the side plate portion extends beyond the center of the front-to-rear direction of the side surface of the first column.
2. A pair of second columns that rise and fall inside the pair of first columns, The first column includes a first hollow member into which the second column is inserted, and a second hollow member adjacent to the first hollow member and closer to the inversion axis than the first hollow member, The load-receiving platform lifting device according to claim 1 , wherein the side plate portion extends beyond a side surface of the second hollow member and reaches a side surface of the first hollow member.
3. The platform lifting device according to claim 1 , wherein the side plate portions each become wider as they move away from the shaft support portion.
4. the side plate portion includes an inner plate portion fixed to an inner surface of the first column and an outer plate portion fixed to an outer surface of the first column, The load-receiving platform lifting device according to claim 1 , wherein the inner plate portion and the outer plate portion extend to the same position on the other side in the front-rear direction.
5. one of a side surface of the first hollow member and a side surface of the second hollow member protrudes outward more than the other of the side surfaces, The load-receiving platform lifting device according to claim 2 , wherein the side plate portion is bent so as to fit along a side surface of the first hollow member and a side surface of the second hollow member.
6. A loading platform lifting device according to any one of claims 1 to 5, A vehicle comprising: a loading platform to which the loading platform lifting device is attached.
Citation Information
Patent Citations
Device for limiting maximum tilt of bed on dump truck
JP1979051116A