Load platform elevator

Abstract

To provide a load receiving platform elevator capable of being manufactured at a lower cost and being operated with high convenience.SOLUTION: In this cargo receiving platform elevator mainly constituting a part of a vehicle for cargo transportation such as a truck, the cargo receiving platform elevator has a cargo receiving platform, an elevating mechanism for elevating the cargo receiving platform, and a fence member. The cargo receiving platform of the cargo receiving platform elevator has a fence member insertion part into which a part of the fence member can be inserted. The fence member is attached to the load receiving platform by inserting a part of the fence member into the fence member insertion part.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a platform elevator that is mainly attached to a vehicle for transporting luggage. [Background technology]

[0002] BACKGROUND ART Conventionally, some trucks, which are vehicles for transporting luggage (cargo), are equipped with a lifting device for loading and unloading luggage in order to improve the workability of loading and unloading operations. This lifting device for loading and unloading luggage includes a plate-shaped member and a lifting mechanism that raises and lowers the plate-shaped member. As the plate-shaped member rises and lowers, the upper surface of the plate-shaped member (the surface on which luggage is placed, the cargo receiving surface) rises and lowers between a position close to the ground and a position at about the same height as the floor of the loading platform. That is, the worker places the load on the plate-shaped member with the upper surface of the plate-shaped member positioned downward, then moves the plate-shaped member upward, and transports the load from the plate-shaped member onto the loading platform. This makes the loading and unloading process easier than if the worker had to manually lift the load from the ground onto the loading platform.

[0003] However, when performing cargo handling work with a lifting device for loading and unloading cargo, it is conceivable that cargo or a worker may accidentally fall off the plate-shaped member while the plate-shaped member is moving. As a technology for preventing such problems from occurring, Patent Document 1 discloses a lifting device (tailgate) in which a safety fence is provided on a plate-shaped member (floor plate).

[0004] The lifting device of Patent Document 1 changes the position of the safety fence between a folded state and an upright state. In detail, the folded state is a position in which the safety fence is laid on the plate-shaped member so that the support portion of the safety fence extends in a direction parallel to the upper surface of the plate-shaped member. In contrast, the upright state is a position in which the safety fence is erected on the plate-shaped member so that the support portion of the safety fence is perpendicular to the upper surface of the plate-shaped member and extends upward.

[0005] That is, in the lifting device of Patent Document 1, the support post portion of the safety fence can rotate around a part on the base end side as a rotation center, and the safety fence transitions from a folded state to an upright state by rotating it toward the outside in the vehicle width direction of the truck. In other words, by moving the tip side portion of the support post portion of the safety fence toward the outside in the vehicle width direction and upward, the safety fence transitions from a reclined state to an upright state, and the position of the safety fence transitions from the folded state to the upright state. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2021-115905 Summary of the Invention [Problem to be solved by the invention]

[0007] In the above-described lifting device, when the safety fence is folded, the safety fence lies flat on the plate-shaped member. Therefore, when a worker tries to erect the safety fence on the plate-shaped member, the other safety fences can get in the way of the worker's foothold. In other words, the above-described lifting device has room for improvement in terms of facilitating the work and improving convenience when using the safety fence.

[0008] In addition, the above-mentioned lifting device has a complex mechanism for rotating the safety fence, which increases the manufacturing cost of the lifting device and makes it difficult to ensure sufficient strength near the center of rotation. In view of the above, there has been a demand for an elevator that can be manufactured more inexpensively and is more convenient to operate.

[0009] Therefore, an object of the present invention is to provide a loading platform elevator that can be manufactured more inexpensively and is highly convenient to operate. [Means for solving the problem]

[0010] One aspect of the present invention for solving the above-mentioned problems is a loading platform elevator that is mounted to form part of a vehicle, and has a loading platform, a lifting mechanism for raising and lowering the loading platform, and a fence member, the loading platform having a fence member insertion portion into which a portion of the fence member can be inserted, and the fence member can be attached to the loading platform by inserting a portion of the fence member into the fence member insertion portion.

[0011] The loading platform elevator of this aspect allows the fence member to be attached to the loading platform with a simple structure, which reduces manufacturing costs. In addition, the fence member can be easily attached and detached from the loading platform, and can be easily removed when not in use, allowing for highly convenient operation.

[0012] In a preferred aspect, the loading platform has a loading surface portion that forms an upper surface on which a load can be placed, and the fence member insertion portion is a bottomed hole that has an opening in the loading surface portion.

[0013] According to this aspect, it is possible to attach the fence member to the loading platform with a simpler structure.

[0014] In a preferred aspect, the fence member has a retaining portion, and the fence member insertion portion has a recess or a hole that engages with the retaining portion.

[0015] According to this aspect, it is possible to prevent (suppress) the occurrence of problems such as the fence member unintentionally coming off the loading platform.

[0016] In a preferred aspect, the receiving platform has a receiving surface portion that forms the upper surface when cargo can be placed on it, and a back forming portion that forms the surface that faces the ground in the same state, and the fence member can be in a usable state with a portion inserted into the fence member insertion portion and attached integrally to the receiving platform, or in an unused state with neither portion inserted into the fence member insertion portion, and the fence member in the unused state can be positioned adjacent to the outside of the back forming portion. The term "ground" as used herein includes any surface on which a vehicle equipped with a platform lift runs (the running surface on which the wheels of the vehicle come into contact), such as an indoor floor.

[0017] According to this aspect, it is possible to place an unused fence member in a location that does not interfere with vehicle travel, storage of luggage, etc. In more detail, for example, compared to storing an unused fence member in the bed of a truck, a larger portion of the space in the bed can be secured for storing luggage, making it possible to more effectively utilize the space in the bed.

[0018] In a preferred aspect, the loading platform has a first component and a second component, and is switchable between a folded state in which it is folded so that at least a part of the second component is arranged above the first component, and an unfolded state in which the second component rotates relative to the first component from the folded state and unfolds; the fence member can be placed in a used state in which a part of it is inserted into the fence member insertion portion and attached integrally to the loading platform, or in an unused state in which neither part is inserted into the fence member insertion portion, and in the folded state, a gap is formed between the first component and the second component in which the fence member in the unused state can be placed.

[0019] In this aspect, too, it is possible to place unused fence members in locations that do not interfere with vehicle movement or the storage of luggage.

[0020] In a preferred aspect, the loading platform has a first component and a second component, and is switchable between a folded state in which it is folded so that at least a part of the second component is arranged above the first component, and an unfolded state in which the second component rotates relative to the first component from the folded state to unfold; it has a plurality of fence members, the plurality of fence members including a first fence member attached to the first component and a second fence member attached to the second component; and it further has a regulating member, a part of which is connected to a part of the first fence member, and another part of which is connected to a part of the second fence member.

[0021] According to this aspect, the fence member is less likely to be damaged when an unexpected force is applied to the fence member, such as when a worker leans on it or when a collapsed load hits it. Also, it is possible to more reliably prevent problems such as the fence member unintentionally coming off the load receiving platform. [Effects of the Invention]

[0022] According to the present invention, it is possible to provide a loading platform elevator that can be manufactured more inexpensively and is highly convenient to operate. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a side view showing a vehicle equipped with a platform lifting device according to an embodiment of the present invention. [Figure 2] An explanatory diagram showing the area around the loading platform lifting device with the loading platform section of Figure 1 in the working state, where (a) shows the loading platform main body section in a lower position, and (b) shows the loading platform main body section in an upper position. [Figure 3] 2 is an explanatory diagram showing the load receiving platform and a plurality of fence members of FIG. 1, showing a state in which three fence members are attached to the load receiving platform and another fence member is being attached thereto; FIG. [Figure 4]This is an oblique view showing the receiving platform section of Figure 1 and the tip portion of the first arm section and the tip portion of the second arm section connected to the receiving platform section, with the portion located below the receiving platform main body section shown in dotted lines. [Figure 5] 1. It is explanatory drawing which shows the state which removes the fence member from the load receiving platform part of the load receiving platform lifting device of FIG. 1, and shifts from the working state to the storage state, and shifts in order from (a) to (d). [Figure 6] FIG. 4 is a perspective view showing the fence member of FIG. 3. [Figure 7] 7A and 7B are cross-sectional views showing the inside of the first vertical bar forming portion of FIG. 6, where (a) shows the anti-pullout protrusion portion in a protruding state, and (b) shows the anti-pullout protrusion portion in a retracted state. [Figure 8] 4 is an explanatory diagram showing how the lower part of the first vertical bar forming part in FIG. 3 is inserted into the fence mounting hole, in the order of (a) and (b). [Figure 9] 10A and 10B are diagrams showing the load-receiving platform in a folded state and further folded up state, where (a) is a perspective view and (b) is a rear view. [Figure 10] (a) is an explanatory diagram showing how a fence holding means is provided on the cargo receiving platform section of Figure 9(a) and how the fence holding means holds an unused fence member, and (b) is a rear view showing a vehicle with the cargo receiving platform lifting device in a stored position and an unused fence member placed on the cargo receiving platform section of (a). [Figure 11] This is an explanatory diagram showing how a fence holding means different from that in Figure 10 is provided on the cargo receiving platform section of Figure 9(a) and how the fence holding means holds unused fence members, in the order of (a) and (b). [Figure 12] This is an explanatory diagram showing a loading platform lifting device different from the above-mentioned embodiment, and shows the loading platform section in a folded state being moved upward to return to a folded state, with the transitions occurring in the order of (a) and (b). [Figure 13] 2(a) is a rear view showing the area around the loading platform of the vehicle of FIG. 1 with the door portion in an open state, and FIG. 2(b) is a perspective view showing a fence member different from the above-described embodiment. [Figure 14]14A and 14B are diagrams showing the loading platform side fittings and fence members shown in FIG. 13, where (a) is an explanatory diagram showing the fence member attached to the loading platform side fittings in an upright position, and (b) is an explanatory diagram showing the fence member attached to the loading platform side fittings in a laying position. [Figure 15] 10A and 10B are explanatory diagrams showing how multiple fence members are connected by fence connecting members in a loading platform lifting device different from the embodiment described above, in which the fence members are connected in this order (a), (b). [Figure 16] 10 is an explanatory diagram showing how a plurality of fence members are connected by a fence connecting member in a loading platform lifting device different from the embodiment described above. FIG. [Figure 17] (a) is an oblique view showing a part of a vertical bar forming portion of a fence member different from the above-mentioned embodiment, and (b) is an explanatory diagram showing the vertical bar forming portion shown in (a) inserted into a fence mounting hole different from the above-mentioned embodiment. [Figure 18] 10 is an explanatory diagram showing a state in which a vertical bar forming portion of a fence member is about to be inserted into a fence mounting hole in a loading platform lifting device different from the embodiment described above. FIG. [Figure 19] 10 is an explanatory diagram showing a state in which a fence member is about to be attached to a loading platform portion in a loading platform lifting device different from the embodiment described above. FIG. [Figure 20] 19, and is an explanatory diagram showing the fence member attached to the load receiving platform. FIG. [Figure 21] 1A and 1B are explanatory diagrams showing a vehicle equipped with a loading platform lifting device according to an embodiment different from that shown in FIG. 1, where (a) shows the loading platform lifting device in a traveling state, and (b) shows the loading platform lifting device in a working state with a fence member attached to the loading platform portion. [Figure 22] An explanatory diagram showing the state in which the loading platform lifting device is in the working state and the fence member is attached in the vehicle shown in Figure 21, where (a) shows the loading platform section in an upper position, and (b) shows the loading platform section in a lower position. [Figure 23]21. This is an explanatory diagram showing a vehicle equipped with a loading platform lifting device according to an embodiment different from that shown in FIGS. 1 and 21, where (a) shows the loading platform lifting device in a traveling state, and (b) shows the loading platform lifting device in a working state with a fence member attached to the loading platform portion. [Figure 24] An explanatory diagram showing the state in which the loading platform lifting device is in the operating state and the fence member is attached in the vehicle shown in Figure 23, where (a) shows the loading platform section in an upper position, and (b) shows the loading platform section in a lower position. [Figure 25] 21 and 23, (a) shows the loading platform lifting device in a traveling state, and (b) shows the loading platform lifting device in a working state with a fence member attached to the loading platform portion. [Figure 26] An explanatory diagram showing the state in which the loading platform lifting device is in the working state and the fence member is attached in the vehicle shown in Figure 25, where (a) shows the loading platform section in an upper position, and (b) shows the loading platform section in a lower position. DETAILED DESCRIPTION OF THE INVENTION

[0024] The loading platform lifting device 1 (loading platform lifting machine) according to an embodiment of the present invention will be described in detail below. In the following description, the relationships of front, rear, left, right, and up and down are the same as those of the vehicle 3, with the driver's cab 2a side being the front side, the opposite side, the loading platform 4 side being the rear side, and the vehicle width direction being the left and right direction.

[0025] As shown in FIG. 1, the loading platform lifting device 1 of this embodiment is a device that is attached to a vehicle body 2 when in use, and constitutes a part of a vehicle 3 to which the loading platform lifting device 1 is attached.

[0026] The vehicle body 2 has a driver's cab 2a and a vehicle body frame 2b extending rearward from the lower part of the driver's cab 2a. The vehicle 3 of this embodiment is an automobile (cargo handling vehicle) for transporting luggage (freight) and has a body frame 2b equipped with a loading platform 4. More specifically, the vehicle 3 has the loading platform 4 attached to the upper side of the body frame 2b behind the driver's cab 2a. The loading platform 4 will be described in more detail below.

[0027] The loading platform lifting device 1 has a lifting device main body formed by a platform drive mechanism 10 (lifting mechanism) and a loading platform 11 (load platform), and a plurality of fence members 12 that can be attached and detached to the loading platform 11 of the lifting device main body.

[0028] As shown in Figure 2, the table drive mechanism 10 has a rail portion 15, a slide portion 16 that slides horizontally (forward and backward) along the rail portion 15, a cylinder member 17 that slides the slide portion 16, and a guide roller 18. In this embodiment, the rail section 15 is composed of two rail members 15a, 15b (one of the rail members 15b is not shown in FIG. 2, see FIG. 10(b)) that are spaced apart in the left-right direction (depth direction in FIG. 2). Each of the rail members 15a, 15b is attached to the body frame 2b via mounting brackets, and extends in the front-rear direction so as to be parallel to each other.

[0029] The slide portion 16 has an arm base portion 21 slidably attached to two rail members 15a and 15b, a first arm portion 22 (lifting mechanism), and a second arm portion 23 (lifting mechanism, not shown in Figure 2, see Figures 4 and 10(b)). The first arm portion 22 and the second arm portion 23 are spaced apart in the left-right direction (depth direction in FIG. 2), and each extends cantilevered from the arm base portion 21. The load receiving platform 11 is attached to the distal end portion of the first arm portion 22 in the extension direction and to the distal end portion of the second arm portion 23 (not shown in FIG. 2, see FIG. 4). The first arm portion 22 and the second arm portion 23 have lift cylinders that function as lifting drive devices, similar to known devices, and the distal ends thereof are raised and lowered by the extension and contraction of the lift cylinders. The load receiving platform 11 is raised and lowered by the raising and lowering of the distal ends of the first arm portion 22 and the second arm portion 23.

[0030] The guide roller 18 is a roller rotatably provided at the rear end portion of a cylinder support member that supports the cylinder member 17 .

[0031] As shown in FIGS. 3 and 4, the load receiving platform portion 11 has a load receiving platform main body portion 26 and a reinforcing connecting portion 27 (see FIG. 4).

[0032] 4, the receiving platform main body 26 is a plate-like member divided into two plate-like members, a first platform component 26a and a second platform component 26b. That is, the receiving platform main body 26 has the first platform component 26a and the second platform component 26b, both of which are plate-like.

[0033] The second unit component 26b is hingedly connected to the first unit component 26a so as to be rotatable. As a result, the receiving platform 11 (the receiving platform main body 26) can be placed in a folded state (see FIGS. 5(b) to 5(d)) in which at least a portion of the first unit component 26a and the second unit component 26b overlap each other in the vertical direction, as shown in FIG. 5. Furthermore, the receiving platform 11 (the receiving platform main body 26) can be placed in an unfolded state (see FIGS. 2 and 5(a)) in which the second unit component 26b rotates and unfolds from the folded state, and the first unit component 26a and the second unit component 26b are aligned in a predetermined direction. In other words, the receiving platform 11 (the receiving platform main body 26) can be switched between a folded state and an unfolded state. The predetermined direction here is a diagonal direction toward the lower rear side in Figs. 2(a) and 5(a), and is a front-rear direction in Fig. 2(b).

[0034] As shown in Figure 5, by removing all of the fence members 12, the loading platform lifting device 1 can be set to a storage state (see Figure 5(d)) in which the loading platform section 11 is folded and stored below the rear of the loading platform 4 (details will be described later). Furthermore, the loading platform lifting device 1 can be set to a working state (see Figure 2) in which the loading platform section 11 is unfolded and located behind the loading platform 4 (details will be described later). Furthermore, as described above, the loading platform section 11 in the working state moves up and down between a lower position (see Figure 2(a)) and an upper position (see Figure 2(b)) as shown in Figure 2. When the loading platform 11 is in a lower position (see FIG. 2(a)), at least a part of the lower part of the loading platform 11 (the lower part of the reinforcing connecting part 27) is in contact with the surface or floor (hereinafter referred to as the ground, etc.) of the place where the vehicle 3 is parked. On the other hand, when the loading platform 11 is in an upper position (see FIG. 2(b)), the upper surface of the loading platform 11 (the upper surface of the loading platform main body 26) is at the same or approximately the same height as the floor surface (the floor surface where cargo is loaded and unloaded) inside the loading platform 4 (packing box). In the following description, unless otherwise specified, the description will be made based on the state in which the load receiving platform 11 is in the unfolded state and disposed at the upper position.

[0035] As shown in Fig. 4, the receiving platform main body 26 has a receiving surface portion 33 that forms a receiving surface on which luggage is placed. The receiving surface portion 33 is the upper surface (one main surface) of the receiving platform main body 26 in the unfolded state, and is a surface formed by lining up one main surface of the first platform component 26a and one main surface of the second platform component 26b. The receiving platform main body 26 also has a back surface forming portion 34 that forms the back surface. The back surface forming portion 34 is the underside (other-side main surface) of the receiving platform main body 26 in the unfolded state, and is the surface where the other-side main surface of the first platform component 26a and the other-side main surface of the second platform component 26b are formed side by side.

[0036] Furthermore, the loading platform main body 26 has a plurality of fence mounting portions 35 (four in this embodiment) to which the fence members 12 are attached. In this embodiment, the fence mounting portion 35 is configured to include multiple (two in this embodiment) fence mounting holes 35a (fence member insertion portions). The fence mounting holes 35a are holes that have an opening in the load receiving surface portion 33. This fence mounting hole 35a, which will be described in detail later, has a vertical hole portion 77 that extends in the up-down direction (toward the back surface forming portion 34) and a horizontal hole portion 78 that branches off from the vertical hole portion 77 and extends horizontally (see FIG. 8). In other words, the horizontal hole portion 78 has an opening on the inner circumferential surface (inner side surface) of the vertical hole portion 77 and is a hole (recess) that extends horizontally (see FIG. 8).

[0037] As shown in Figure 4, the reinforcing connecting portions 27 function as reinforcing members (reinforcing strips) that improve the strength of the loading platform main body 26, and also function as connecting portions to which the tip portions of the arm portions (first arm portion 22, second arm portion 23) are attached. In this embodiment, a total of two reinforcing connecting portions 27 are provided, one at a time and spaced apart in the left-right direction, with the tip portion of the first arm portion 22 attached to one and the tip portion of the second arm portion 23 attached to the other. Since the two reinforcing connecting portions 27 have the same structure, only one will be described in detail, and a detailed description of the other will be omitted.

[0038] The reinforcing connecting portion 27 has a first reinforcing body component 27a attached to the other main surface of the first base component 26a, and a second reinforcing body component 27b attached to the other main surface of the second base component 26b.

[0039] The first reinforcing body component 27a has two flat plate-like portions (not shown) that are in surface contact with the other main surface of the first base component 26a, and two standing plate-like portions 40, 41 that hang down from the two flat plate-like portions. That is, the standing plate-like portions 40, 41 are standing plate-like portions that have a height in a direction perpendicular to the main surface of the first base component 26a and a thickness in the left-right direction. The two upright plate-like portions 40, 41 are arranged with a gap between them in the left-right direction. The tip ends of the arm portions (first arm portion 22, second arm portion 23) are attached to the two upright plate-like portions 40, 41 with the tip ends of the arm portions inserted into the gap formed between the two upright plate-like portions 40, 41.

[0040] The second reinforcement component 27b has two flat plate-shaped portions (not shown) that are in surface contact with the other main surface of the second base component 26b, two upright plate-shaped portions 44, 45 that hang down from the two flat plate-shaped portions, and a connecting flat plate portion 46 (see Figure 9, etc.). The upright plate-like portions 44, 45 of the second reinforcing body component 27b are also upright plate-like portions that have a height in a direction perpendicular to the main surface of the second base component 26b and a thickness in the left-right direction. Note that the height of some of the upright plate-like portions 44, 45 in this embodiment decreases toward the tip end of the second base component 26b (toward the lower right in FIG. 4). The connecting flat plate portion 46 is a flat plate portion that connects a part of the lower end portion of one upright plate portion 44 with a part of the lower end portion of the other 45, and is inclined so that its height decreases as it approaches the tip side of the second base component portion 26b.

[0041] One standing plate-like portion 44 is a portion that is aligned with one standing plate-like portion 40 of the first reinforcing body constituent portion 27a in a predetermined direction (the alignment direction of the first reinforcing body constituent portion 27a and the second reinforcing body constituent portion 27b). The other standing plate-like portion 45 is also a portion that is aligned with the other standing plate-like portion 41 of the first reinforcing body constituent portion 27a in a predetermined direction.

[0042] 3, the loading platform lifting device 1 of this embodiment has a first fence group 50 and a second fence group 51 on one side and the other side in the left-right direction, each of which is made up of a plurality of fence members 12. Since the first fence group 50 and the second fence group 51 have the same structure, only one will be described in detail, and a detailed description of the other will be omitted.

[0043] The first fence group 50 includes two fence members 12, one of which is a fence member 12 (first fence member 12a) attached to the first base component 26a, and the other of which is a fence member 12 (second fence member 12b) attached to the second base component 26b.

[0044] As shown in FIG. 6, the fence member 12 has vertical bar forming portions extending in the vertical direction and horizontal bar forming portions extending in the horizontal direction, which is a direction intersecting the vertical direction. In detail, the fence member 12 has, as vertical bar forming portions, a first vertical bar forming portion 55, a second vertical bar forming portion 56, and a third vertical bar forming portion 57. The fence member 12 also has, as horizontal bar forming portions, a first horizontal bar forming portion 58, a second horizontal bar forming portion 59, and a third horizontal bar forming portion 60. The vertical bar forming portions and the horizontal bar forming portions are connected to form the main body of the fence member 12. The fence member 12 of this embodiment also has a contact plate portion 61 and a retaining mechanism portion 62.

[0045] The first vertical bar forming portion 55, the second vertical bar forming portion 56, and the third vertical bar forming portion 57 are arranged at positions separated from each other in the horizontal direction, and the first vertical bar forming portion 55 and the second vertical bar forming portion 56 extend parallel to each other. The third vertical bar forming portion 57 is closer to the first vertical bar forming portion 55 than the second vertical bar forming portion 56 and is arranged below the second vertical bar forming portion 56, and the first vertical bar forming portion 55 and the third vertical bar forming portion 57 also extend in the same direction so as to be parallel to each other.

[0046] The first horizontal bar forming portion 58 extends linearly between the upper end portion of the first vertical bar forming portion 55 and the upper end portion of the second vertical bar forming portion 56, and both longitudinal end portions are continuous with these. The portion continuous with the upper end portion of the first vertical bar forming portion 55 and the portion continuous with the upper end portion of the second vertical bar forming portion 56 extend in a curved shape so that the corners are rounded.

[0047] The second horizontal bar forming portion 59 extends between the mid-length portion of the first vertical bar forming portion 55 and the mid-length portion of the second vertical bar forming portion 56, and both end portions in the longitudinal direction are continuous with these. The third horizontal bar forming portion 60 extends linearly between the lower end portion of the second vertical bar forming portion 56 and the upper end portion of the third vertical bar forming portion 57, and both longitudinal end portions are continuous with these. The portion continuous with the lower end portion of the second vertical bar forming portion 56 and the portion continuous with the upper end portion of the third vertical bar forming portion 57 extend in a curved shape so that the corners are rounded. Most of the first horizontal beam forming portion 58, most of the second horizontal beam forming portion 59, and most of the third horizontal beam forming portion 60 extend in the same direction so as to be parallel to one another. In this embodiment, the vertical and horizontal bar forming portions are both cylindrical portions made of metal, that is, the vertical and horizontal bar forming portions are hollow and have voids therein.

[0048] The abutment plate portion 61 is a flat metal portion located slightly above the lower end of the fence member 12, and is formed integrally with the first vertical bar forming portion 55, with one portion penetrating the thickness direction thereof and the other portion penetrating the third vertical bar forming portion 57. In other words, the abutment plate portion 61 also functions as a connecting portion that connects the first vertical bar forming portion 55 and the third vertical bar forming portion 57. As a result, the first vertical bar forming portion 55 and the third vertical bar forming portion 57 each have a portion that extends above the upper surface of the abutment plate portion 61 and a portion that extends below the lower surface of the abutment plate portion 61. The portion of the first vertical bar forming portion 55 that is located below the abutment plate portion 61 and the portion of the third vertical bar forming portion 57 that is located below the abutment plate portion 61 have the same length in the up-down direction (vertical direction). The first vertical-bar forming portion 55 has, in a portion located below the abutting plate portion 61, a protrusion insertion hole portion 55a that communicates between the inside and outside.

[0049] As shown in Figures 6 and 7, the anti-detachment mechanism 62 has a substantially cylindrical gripping portion 65 (see Figure 6) that is held by an operator, a wire member 66 (linear member), an anti-detachment protrusion portion 67 (anti-detachment portion), a protrusion receiving portion 68 (see Figure 7), and a biasing member 69 (see Figure 7).

[0050] The wire member 66 is a string-like member made of metal, and one end in the lengthwise direction is attached to the grip portion 65 (see FIG. 6), and the other end is attached to the retaining protrusion 67 (see FIG. 7). The retaining mechanism 62 has a plurality of pulley members (some of which are not shown), and the middle portion of the wire member 66 in the lengthwise direction is hung on the pulley members. In other words, the wire member 66 extends from the grip portion 65 to the retaining protrusion 67 while being bent at multiple points in the middle portion.

[0051] The retaining projection 67 has a projection main body 67a having a generally cylindrical shape with a bottom, and an engaging protrusion 67b that protrudes outward from the outer circumferential surface of the projection main body 67a. The protrusion receiving portion 68 has a receiving portion main body 68a having a generally cylindrical shape and a receiving portion-side lid member 68b. The receiving portion main body 68a has a flange portion 72 at one end in the longitudinal direction, and the one end in the longitudinal direction is fixed to the inner surface of the first vertical bar forming portion 55. In addition, the receiving portion-side lid member 68b is detachably attached to the other end in the longitudinal direction. The receiving body 68a has an engagement hole 73 on its outer circumferential surface. The engagement hole 73 is an elongated hole extending in the length direction of the receiving body 68a (the left-right direction in FIG. 7), and is a hole into which the engagement protrusion 67b can be inserted almost exactly. The receiving portion side cover member 68b has a wire insertion hole 74 through which the wire member 66 can be inserted.

[0052] The biasing member 69 is a compression coil spring, which, when compressed, exerts an elastic restoring force in a direction opposite to the direction of compression.

[0053] 7, in the retaining mechanism 62, a part of the protrusion main body 67a is disposed inside the receiving body 68a, and the engaging protrusion 67b is engaged with (disposed within) the engaging hole 73. The protrusion main body 67a is attached to the protrusion receiving part 68 in a state where it can move relatively to the protrusion receiving part 68. Further, another part of the protrusion main body 67a is positioned inside the protrusion insertion hole 55a. One end of the biasing member 69 abuts against the retaining protrusion 67, and the other end abuts against the protrusion receiving portion 68 (receiving portion side cover member 68b). As a result, the protrusion main body 67a is constantly biased by the biasing member 69 in a direction from the inside to the outside of the first vertical bar forming portion 55. Furthermore, one end of the wire member 66 in the length direction passes through the wire insertion hole 74 and is attached to the protrusion main body 67a.

[0054] As a result, as shown in FIGS. 6 and 7(a), when no external force is applied, the retaining mechanism 62 is in a state in which a portion of the protrusion main body 67a protrudes outward from the protrusion insertion hole 55a. When an operator grips the gripping portion 65 (see FIG. 6) and pulls the gripping portion 65 downward, the retaining protrusion 67 is pulled inward by the wire member 66 toward the first vertical bar forming portion 55. As a result, as shown in FIG. 7(b), the retaining protrusion 67 moves inward against the biasing force of the biasing member 69. This causes the retaining protrusion 67 to transition from the protruding state to the retracted state. Note that the retracted state is a state in which the amount of protrusion of the retaining protrusion 67 (the length of the portion located outside the first vertical bar forming portion 55) is shorter than in the protruding state in which no external force is applied.

[0055] In this embodiment, when the removal prevention protrusion 67 transitions to the retracted state, the entire removal prevention protrusion 67 is housed within the first vertical bar forming portion 55 and does not protrude to the outside. That is, the position of the outer end (left end in FIG. 7) of the removal prevention protrusion 67 in the movement direction (left-right direction in FIG. 7) of the removal prevention protrusion 67 becomes the same position as the position of the outer opening of the protrusion insertion hole 55a in the same direction. Furthermore, when the anti-pullout protrusion 67 is in the retracted state, when the operator releases the gripping portion 65, the outer portion of the anti-pullout protrusion 67 protrudes outward from the protrusion insertion hole portion 55a due to the biasing force of the biasing member 69, and transitions to the protruding state.

[0056] That is, when attaching the fence member 12 to the load receiving platform portion 11 (load receiving platform main body portion 26) (see FIG. 3), the worker retracts the anti-detachment protrusion 67 as shown in FIG. 8(a). In this state, as shown in FIG. 3, the lower end portion of the first vertical bar forming portion 55 and the lower end portion of the third vertical bar forming portion 57 are inserted into different fence mounting holes 35a. In detail, the lower end portion of the first vertical bar forming portion 55 is inserted into the vertical hole portion 77 (see FIG. 8) of the fence mounting hole 35a, and the lower end portion of the third vertical bar forming portion 57 (see FIG. 3) is inserted into the vertical hole portion 77 of the other fence mounting hole 35a (detailed illustration omitted). More specifically, the lower end portion of the fence member 12 is inserted into the two fence mounting holes 35a until the lower surface of the abutment plate portion 61 of the fence member 12 comes into surface contact with the upper surface of the loading platform main body portion 26.

[0057] Then, the worker places the retaining projection 67 in the protruding state as shown in FIG. 8(b). As a result, a part of the retaining projection 67 is inserted into the horizontal hole 78, and the retaining projection 67 functions as a retainer that prevents unintentional movement (detachment) of the fence member 12. In other words, even if an attempt is made to move the fence member 12 upward, the retaining projection 67 abuts against the inner peripheral surface (inner peripheral wall) of the horizontal hole 78, preventing the movement. When removing the fence member 12 from the load receiving platform portion 11 (load receiving platform main body portion 26), the worker retracts the anti-detachment protrusion portion 67 and pulls out the fence member 12 from the two fence mounting holes 35a to remove it.

[0058] That is, as described above, in the receiving platform lifting device 1 of this embodiment, as shown in Fig. 3, the fence member 12 can be attached to and detached from the receiving platform section 11 (the receiving platform main body section 26) simply by inserting and removing the fence member 12 into and from the fence mounting section 35 while operating the anti-detachment mechanism section 62. That is, the fence member 12 can be easily attached and detached from the receiving platform section 11, and can be easily switched between a used state in which it is attached to the receiving platform section 11 and a non-used state in which it is detached from the receiving platform section 11. For this reason, the loading platform lifting device 1 can easily be switched between a state in which one or more fence members 12 are attached to the loading platform section 11 and a state in which no fence members 12 are attached to the loading platform section 11, and by switching between these states as needed, it is possible to operate it in a highly convenient manner.

[0059] As described above, the loading platform lifting device 1 can be switched between the working state and the storage state by removing the fence members 12 from the loading platform section 11 (removing all of the fence members 12). Next, the operation of switching the loading platform lifting device 1 from the working state to the storage state will be described.

[0060] When switching from the working state to the storage state, as shown in Figures 5(a) and 5(b), the second platform component 26b is rotated from the state in which the load receiving platform 11 is in the unfolded state and arranged in the lower position (see Figure 5(a)). Then, the tip side of the second platform component 26b is brought into contact with the guide roller 18, and the second platform component 26b is placed in a leaning position (see Figure 5(b)). This causes the load receiving platform 11 (load receiving platform main body 26) to transition from the unfolded state to the folded state.

[0061] Next, as shown in Figures 5(b) and 5(c), the tip sides of the first arm portion 22 and the second arm portion 23 (not shown in Figure 5) are raised. As a result, the second unit component 26b is folded up by its own weight (see Figure 5(c)). That is, by being folded up, a part of one main surface of the first unit component 26a and a part of one main surface of the second unit component 26b, which are arranged in opposing positions, come into close surface contact, and the gap that had formed between them is eliminated. Then, by operating the cylinder member 17 and sliding the slide portion 16 forward, the loading platform lifting device 1 transitions to a stored state (see Figure 5(d)). Note that this stored state is also the state when the vehicle 3 is traveling (traveling state).

[0062] On the other hand, when switching from the storage state to the working state, the switching is performed in the reverse order to the above-described switching. That is, the slide portion 16 is slid rearward, the tip ends of the first arm portion 22 and the second arm portion 23 (not shown in FIG. 5) are lowered, and a part of the load receiving platform portion 11 (first reinforcing body component 27a) comes into contact with the ground, etc. In this state, the second platform component 26b is rotated, and the load receiving platform portion 11 (load receiving platform main body portion 26) is shifted from the folded state to the unfolded state. In this way, when in the working state, as described above, by raising and lowering the tip ends of the first arm portion 22 and the second arm portion 23, the receiving platform portion 11 (receiving platform main body portion 26) can be raised and lowered between an upper position and a lower position, as shown in Figure 2. That is, the receiving platform 11 (load receiving platform main body 26) moves up and down (in a direction including a vertical component) as the tips of the first arm 22 and the second arm 23 move up and down, and moves in the front-to-rear direction as the slide 16 moves in the front-to-rear direction. That is, the platform drive mechanism 10 functions as a loading platform drive mechanism that moves the loading platform 11 in the horizontal direction (front-to-rear direction) and the up-to-down direction.

[0063] Here, by folding the load receiving platform 11 as described above and then folding it further, the first reinforcing body component 27a and the second reinforcing body component 27b that constitute one reinforcing connecting portion 27 are arranged at positions spaced apart in the vertical direction, as shown in Fig. 9. In other words, the first reinforcing body component 27a and the second reinforcing body component 27b that constitute one reinforcing connecting portion 27 are arranged at positions where at least a portion of the first reinforcing body component 27a and at least a portion of the second reinforcing body component 27b overlap in the vertical direction.

[0064] In this case, as shown in Figure 9(b), the area (space) outside the other main surface of the second base component 26b (above the top surface in Figure 9) and outside one of the second reinforcing body components 27b (standing plate-shaped portion 44) in the left-right direction is defined as the first area 80. Similarly, an area that is on the outside of the other main surface of the second base-constituting portion 26b and is located more inward in the left-right direction than one second reinforcing body component 27b (standing plate-shaped portion 45) and more inward than the other second reinforcing body component 27b (standing plate-shaped portion 44) is defined as a second area 81. In other words, the second area 81 is an area that is located between one second reinforcing body component 27b and the other second reinforcing body component 27b in the left-right direction. Similarly, a third region 82 is defined as a region outside the other main surface of the second base component 26b and on the outer side of the other second reinforcing body component 27b (standing plate-shaped portion 45).

[0065] Furthermore, the area outside the other main surface of the first base component 26a (below the lower surface in Figure 9) and outside one of the first reinforcing body components 27a (standing plate-shaped portion 40) is defined as a fourth area 83. Similarly, a region that is on the outside of the other main surface of the first base-constituting portion 26a and is located more inward in the left-right direction than one first reinforcing body component 27a (standing plate-shaped portion 41) and more inward than the other first reinforcing body component 27a (standing plate-shaped portion 40) is defined as a fifth region 84. In other words, the fifth region 84 is a region that is located between one first reinforcing body component 27a and the other first reinforcing body component 27a in the left-right direction. Similarly, a sixth region 85 is an area outside the other main surface of the first base component 26a and located on the outer side of the other first reinforcing body component 27a (standing plate-like portion 41).

[0066] That is, the first region 80, the second region 81, and the third region 82 are regions that include the portion adjacent to the upper side of the second unit component 26b in the folded state, and the fourth region 83, the fifth region 84, and the sixth region 85 are regions that include the portion adjacent to the lower side of the first unit component 26a. The first area 80 to the sixth area 85 may be areas in which fence members 12 that have been removed from the load-receiving platform 11 and are in an unused state are placed.

[0067] For example, as shown in FIG. 10(a), the receiving platform 11 may be provided with a fence holding means 90 for holding the fence member 12 in the second area 81, and the unused fence member 12 may be placed in the second area 81 in a laid-down position. The laid-down position here refers to a position in which the fence member 12 is laid on its side so that the vertical bar forming portion is in a laid-down position (the extension direction in the used state is a state in which the length of the vertical component is shorter). In this embodiment, the laid-down position refers to a position in which the vertical bar forming portion extends in a direction parallel or approximately parallel to the other main surface of the second reinforcing body component 27b (the surface of the portion of the receiving platform main body 26 that is closest to the laid-down fence member 12).

[0068] The fence holding means 90 (first fence holding means) is composed of a first holding fitting 90a, a second holding fitting 90b, and a third holding fitting 90c. The first holding fitting 90a, the second holding fitting 90b, and the third holding fitting 90c are all metal fittings that extend with a generally U-shaped cross section, and are fixed integrally to the second base component 26b.

[0069] The first retaining fitting 90a is a fitting that can hold at least a portion of the second horizontal bar forming portion 59 approximately exactly, and can hold the second horizontal bar forming portion 59 by inserting the second horizontal bar forming portion 59 between the two upright plate-shaped portions. The second retaining fitting 90b is a fitting that can hold at least a portion of the first vertical bar forming portion 55 approximately exactly, and can hold the first vertical bar forming portion 55 by inserting the first vertical bar forming portion 55 between the two upright plate-shaped portions. The third retaining fitting 90c is a fitting that can hold at least a portion of the third vertical bar forming portion 57 approximately exactly, and can hold the third vertical bar forming portion 57 by inserting the third vertical bar forming portion 57 between the two upright plate-shaped portions.

[0070] That is, the fence holding means 90 of this embodiment holds the fence member 12 at multiple locations, thereby functioning as a movement restriction means (fence movement restriction means) that restricts unintended movement of the fence member 12. The fence holding means 90 of the above-described embodiment holds the fence member 12 at multiple locations, but it is also possible to use a holding means that holds the fence member 12 at one location instead. Furthermore, the holding means is not limited to the above-described first vertical bar forming portion 55, third vertical bar forming portion 57, and second horizontal bar forming portion 59, and may hold other portions of the fence member 12. That is, the one or more portions that the holding means holds may be changed as appropriate. The fence holding means 90 may be fixed integrally and inseparably by welding or other fixing means, or may be fixed via a temporary fastening element. Note that the "temporary fastening element" referred to here is a type of fastening element that can be removed in principle without being destroyed, such as a screw or a combination of a bolt and nut.

[0071] According to this configuration, when the loading platform lifting device 1 is in the stored state, as shown in FIG. 10(b), the unused fence member 12 can be placed between the folded loading platform 11 and the vehicle body frame 2b. In other words, the fence member 12 removed from the loading platform 11 can be placed in a space that was previously dead space in conventional cargo handling vehicles. This allows for effective use of space throughout the vehicle 3. For example, compared to placing the removed fence member 12 on the floor inside the loading platform 4 (packing box), there is no need to prepare a place to place the removed fence member 12, and the loading platform 4 can be used more effectively.

[0072] In addition to or instead of the second area 81, one or more of the first area 80 to the sixth area 85 may be designated as an area where unused fence members 12 are placed (hereinafter also referred to as an unused fence placement area). In this case, the above-mentioned holding means may be provided in the area designated as the unused fence placement area. Alternatively, it is also possible to fix the fence members 12 placed in a predetermined area to the load receiving platform 11 with an external member such as a wire, without providing a means for restricting the movement of the fence members. However, from the viewpoint of improving ease of operation, it is preferable to provide the above-mentioned holding means (movement restriction means) in the area designated as the unused fence placement area.

[0073] In addition, when the above-mentioned first area 80, third area 82, fourth area 83, and sixth area 85 are defined as unused fence arrangement areas, a part of the fence member 12 may be located outward in the left-right direction from the receiving platform section 11 (load receiving platform main body section 26). In addition, it is also possible that a part of the fence member 12 is located outward in the left-right direction from the receiving platform section 11. In other words, an unused fence arrangement area (an arrangement area of ​​a fence member 12 in an unused state) is an area where at least a part or all of the fence member 12 is arranged.

[0074] Furthermore, the above-mentioned loading platform lifting device 1 may be configured such that, as shown in Figure 11, an area including an area adjacent to the outer lateral side (outside in the left-right direction) of the loading platform section 11, and an area located further to the outer lateral side than the loading platform section 11, is used as an unused fence placement area. More specifically, the unused fence placement area may be an area located laterally outside the cargo receiving platform 11 at either one or both of the left and right ends of the cargo receiving platform 11. In the following description, an example will be described in which the area to the lateral outside of the cargo receiving platform section 11 located at one end in the left-right direction is set as the unused fence placement area.

[0075] In this case, a fence holding means 93 (second fence holding means) may be provided on one end surface in the left-right direction of the folded-up load receiving platform main body 26. This fence holding means 93 holds a part of the fence member 12, and functions as a movement restriction means (fence movement restriction means) that restricts unintended movement of the fence member 12. In this embodiment, a plurality of fence holding means 93 are provided, and more specifically, two fence holding means 93 in total are provided, one at each position spaced apart in the front-rear direction.

[0076] The fence holding means 93 has a first metal fitting forming piece 93a fixed to the first base component 26a, and a second metal fitting forming piece 93b fixed to the second base component 26b. The first fitting forming piece 93a has a flat plate-like portion that protrudes outward in the left-right direction of the first base component 26a. This flat plate-like portion has a thickness in the thickness direction of the first base component 26a. Similarly, the second fitting forming piece 93b has a flat plate-like portion that protrudes outward in the left-right direction of the second base component 26b. This flat plate-like portion has a thickness in the thickness direction of the second base component 26b.

[0077] As the load receiving platform 11 (load receiving platform main body 26) transitions to the folded state and then further folded up, the flat portion of the first metal fitting forming piece 93a and the flat portion of the second metal fitting forming piece 93b face each other with a gap between them, as shown in FIG. 11 . This makes it possible to hold a portion of the fence member 12 (in this embodiment, the first vertical bar forming portion 55). Note that the gap between the two flat portions at this time is narrower than the thickness of the portion to be held (the first vertical bar forming portion 55). In other words, by slightly elastically deforming the two flat portions and inserting the portion to be held into the space between them, the two flat portions sandwich the portion to be held, and the portion to be held is thereby held. The load receiving platform 11 of this embodiment is capable of holding the unused fence member 12 in a lying position by means of the two fence holding means 93.

[0078] Furthermore, as shown in FIG. 12, the receiving platform lifting device 101 (receiving platform lifting machine) may be configured such that when the receiving platform section 11 (receiving platform main body section 26) is in a folded state (see FIG. 12(a)) and then further folded up (see FIG. 12(b)), a gap 95 (space) is formed between one main surface of the first platform section 26a and one main surface of the second platform section 26b that face each other in the vertical direction. Note that, in such a configuration, the hinge member used to hinge the first platform section 26a and the second platform section 26b may be a hinge member whose length in the arrangement direction of the first platform section 26a and the second platform section 26b in the unfolded state is longer than that of the above-described embodiment. In other words, a hinge member that is longer than that of the above-described embodiment may be used, thereby forming the gap 95 in the folded state. This gap 95 may be used as an unused fence arrangement area. In this case, the unused fence member 12 may be sandwiched and held between the first unit component 26a and the second unit component 26b. That is, a part of one main surface of the first unit component 26a and a part of one main surface of the second unit component 26b may be in close contact with the fence member 12. Alternatively, the first unit component 26a may be provided with a storage recess having an opening on one main surface side, and unused fence members 12 may be stored in the recess. In this case, a removable lid may be provided to cover at least a portion of the storage recess, and the lid may be attached with the fence members 12 stored in the storage recess. Similarly, the second unit component 26b may be provided with a storage recess having an opening on one main surface side, and unused fence members 12 may be stored in the recess.

[0079] As shown in FIG. 13(a), the above-described loading platform 4 has a loading platform main body 4a (packing box) and two openable and closable doors 4b attached to the rear portion of the loading platform main body 4a. The loading platform main body 4a has a storage space formed therein for storing luggage, and has a front wall 105 that blocks the front of the storage space, an upper wall 106 that forms the ceiling surface of the interior, a lower wall 107 that forms the floor surface of the interior, and two side wall portions 108 that are spaced apart and opposite each other in the left-right direction. The two door sections 4b are upright members, and are double-doors (double-doors) that can be opened and closed individually.

[0080] In the cargo bed 4 of this embodiment, cargo bed side fittings 111 are attached to the inner surfaces of the side wall portions 108 and the inner surfaces of the door portions 4b. The cargo bed side fittings 111 are elongated members, and are formed with a plurality of locking holes 111a arranged at intervals in the longitudinal direction. For convenience of drawing, only some of the locking holes 111a are labeled with reference numerals, and the other reference numerals are omitted. Furthermore, in the following drawings, reference numerals are omitted as necessary for similar members and similar portions of other members and portions. In this embodiment, a lashing rail is used as the loading platform side metal fitting 111. The loading platform side metal fitting 111 is attached to the side wall portion 108 at a position spaced above the lower end of the door portion 4b.

[0081] In this case, as shown in FIG. 13(b), the fence member 112 may be configured to have a fence-side locking protrusion 115 that can engage with the locking hole 111a of the loading platform metal fitting 111. This fence member 112 is formed by providing (attaching) the fence-side locking protrusion 115 to the vertical bar forming portion and / or the horizontal bar forming portion of the above-mentioned fence member 12. The fence member 112 of this embodiment is provided with a fence-side locking protrusion 115 on each of the first vertical bar forming portion 55, the second vertical bar forming portion 56, the first horizontal bar forming portion 58, and the second horizontal bar forming portion 59. Each fence-side locking protrusion 115 protrudes in the same direction from each portion (toward the left front side in FIG. 13(b)).

[0082] Here, of the multiple fence-side locking protrusions 115, some of the fence-side locking protrusions 115 attached to the vertical bar forming portions and the other fence-side locking protrusions 115 attached to the horizontal bar forming portions are in different positions. That is, the fence-side locking protrusions 115 attached to the horizontal bar forming portions are in a position rotated 90 degrees from the fence-side locking protrusions 115 attached to the vertical bar forming portions when viewed from the side (when viewed from above with the protruding direction of the fence-side locking protrusions 115 as the line of sight).

[0083] From the above, the fence member 112 of this embodiment can be attached to the loading platform side metal fitting 111 in an upright position as shown in Figure 14 (see Figure 14(a)), and can also be attached in a laying position (see Figure 14(b)). Note that the "upright position" here is a position in which the vertical bar forming portion extends in the vertical direction, similar to the state in which the fence member 112 is in use. In contrast, the "laying position" is a position in which the vertical bar forming portion extends in the horizontal direction. In other words, the "laying position" is a position in which the vertical bar forming portion is more tilted than in the "upright position" (a position in which the vertical component of the vertical bar forming portion is shorter than in the "upright position"). That is, the fence member 112 of this embodiment can be attached to the inside of the side wall portion 108 of the loading platform 4 or the inside of the door portion 4b, and the posture at the time of attachment can be selected from a plurality of (two) postures.

[0084] The position of the fence-side locking protrusion 115 is not limited to the above, and it may be fixed to the main body of the fence member 112 in a position rotated clockwise by a predetermined angle (for example, an angle between -90 degrees and 90 degrees) in a side view from the position where it is attached to the vertical bar forming portion. Also, it is conceivable that the loading platform-side metal fitting 111 may be attached to the outer surface of the side wall portion 108 of the loading platform 4 or the outer surface of the door portion 4b. In this way, if the unused fence member 112 can be attached to the side wall 108 or the door 4b via the loading platform side metal fittings 111, the loading platform 4 can be used more effectively than if the unused fence member 112 were placed on the bottom wall 107 (on the floor inside the loading platform 4). In other words, more luggage can be loaded into the storage space inside the loading platform 4.

[0085] Furthermore, the above-described loading platform lifting device 1 may have a structure including a fence connecting member 213 (regulating member) that connects a plurality of (two) fence members 212 that are each in a usable state, as shown in FIG. 15(a), the fence connecting member 213 is an elongated member having a generally U-shaped cross section, and has two upright plate-shaped portions 213a and a flat plate-shaped portion 213b connecting the upper end portions of the two upright plate-shaped portions 213a. A gap is formed between the two upright plate-shaped portions 213a. The standing plate-shaped portion 213a has a plurality of insertion holes 215 through which fastening elements can be inserted, and in this embodiment, there are two insertion holes 215, one on each side at positions spaced apart in the longitudinal direction of the fence connecting member 213. The insertion hole 215 of one standing plate-shaped portion 213a and the insertion hole 215 of the other standing plate-shaped portion 213a are formed in positions facing each other in the arrangement direction of the two standing plate-shaped portions 213a.

[0086] The fence member 212 is a member obtained by providing a fence-side insertion hole 216 in addition to the above-described fence member 12. The fence-side insertion hole 216 is a hole that penetrates a part of the fence member 212 in the left-right direction (the left-right direction when in use). In this embodiment, one fence member 212 has the fence-side insertion hole 216 formed in the second vertical bar forming portion 56, and the other fence member 212 has the fence-side insertion hole 216 formed in the first vertical bar forming portion 55. Furthermore, one of the fence members 212 is a fence member 212 (hereinafter also referred to as the first fence member 212a) attached to the first unit component 26a, and the other fence member 212 is a fence member 212 (hereinafter also referred to as the second fence member 212b) attached to the second unit component 26b.

[0087] That is, as in the above-described embodiment, two fence members 212 are attached to the load receiving platform 11 and are set to a usable state. Then, a fence connecting member 213 is attached to the upper portions of the two fence members 212, and the upper portions of the two fence members 212 are inserted into the gap between the two upright plate-shaped portions 213a. At this time, the fence-side insertion hole 216 of the first fence member 212a is positioned between two insertion holes 215 (see FIG. 15(a) , one of which is not shown) located toward one longitudinal end of the fence connecting member 213. That is, the two insertion holes 215 and the fence-side insertion hole 216 overlap in the left-right direction to form a communication hole. Similarly, the two insertion holes 215 located toward the other longitudinal end of the fence connecting member 213 overlap in the left-right direction with the fence-side insertion hole 216 of the second fence member 212b to form a communication hole. Then, temporary fastening elements such as screws are inserted into the two communication holes, respectively, and the two fence members 212 are connected together via the fence connecting member 213. With this configuration, each of the two fence members 212 is restricted from moving relative to the other fence member 212, making it possible to more reliably prevent unintended movement of the fence members 212 (such as falling off the loading platform portion 11).

[0088] 16, the above-described loading platform lifting device 1 may be configured to have a fence connecting member 313 (regulating member) shown in FIG. 16 instead of the above-described fence connecting member 213. This fence connecting member 313 may be configured to connect multiple (two) fence members 312 that are each in a usable state.

[0089] The fence connecting member 313 has a support portion 313a and two movable pieces 313b. The support pillar 313a is a rectangular pillar-shaped (rectangular cylindrical) portion extending in the vertical direction, and is attached to the receiving platform main body 26 (in this embodiment, the second platform component 26b). That is, the receiving platform main body 26 is provided with a connecting member attachment hole (not shown), which is a bottomed hole with an opening in the receiving surface 33. The support pillar 313a can be attached to and detached from the receiving platform main body 26 (the receiving platform 11) by inserting and removing the lower end portion of the support pillar 313a into and from the connecting member attachment hole. In this embodiment, when the support pillar 313a is attached to the receiving platform main body 26, at least a portion of the support pillar 313a is positioned between the two fence members 312. Note that although the support pillar 313a in this embodiment is attached to the second platform component 26b, it may also be attached to the first platform component 26a. Alternatively, the load-receiving platform 11 may be configured to have a hole for attaching a connecting member that spans the first and second vehicle components 26a, 26b when the platform 11 is deployed, and the support 313a may be inserted into this hole for attaching a connecting member. In other words, the support 313a may be attached to both the first and second vehicle components 26a, 26b.

[0090] The movable piece 313b is a plate-like member rotatably attached to the support 313a via a pivot shaft, and is a substantially rectangular plate-like member having a thickness in the left-right direction (the left-right direction when the support 313a is attached to the receiving platform main body 26). The movable piece 313b has an insertion hole at one end in the length direction through which the pivot shaft is inserted, and has an engagement recess 315 at the other end, which is the free end. The engagement recess 315 is a missing portion formed by removing a portion of the movable piece 313b from the edge. The two movable pieces 313b are attached to the support 313a at positions at different heights.

[0091] The fence member 312 is a member provided with a fence-side locking protrusion 316 in addition to the above-described fence member 12. The fence-side locking protrusion 316 is a protrusion that protrudes outward in the left-right direction from a part of the fence member 312 when in use. In this embodiment, one fence member 312 has the fence-side locking protrusion 316 formed in the first vertical bar forming portion 55, and the other fence member 312 has the fence-side insertion hole portion 216 formed in the second vertical bar forming portion 56. The fence-side locking protrusion 316 of one fence member 312 and the fence-side locking protrusion 316 of the other fence member 312 are formed so that they are positioned at different positions in the up-down direction (height direction). One of the fence members 312 is a fence member 312 attached to the first unit component 26a (hereinafter also referred to as the first fence member 312a), and the other fence member 312 is a fence member 312 attached to the second unit component 26b (hereinafter also referred to as the second fence member 312b).

[0092] That is, the two fence members 312 and the support posts 313a are attached to the receiving platform main body 26 (receiving platform 11), and the two movable pieces 313b are each rotated to engage the engagement recesses 315 with the fence-side locking protrusions 316. That is, a state is created in which a portion of each of the different fence-side locking protrusions 316 is positioned within the engagement recesses 315 of the two movable pieces 313b. This results in the two fence members 312 being connected together via the fence connecting member 313. On the other hand, to release the connection, the two movable pieces 313b are each rotated to release the engagement between the engagement recesses 315 and the fence-side locking protrusions 316. This releases the connection between the two fence members 312. The support post 313a may have a retaining mechanism similar to the retaining mechanism 62 of the fence member 12. In this case, the connecting member attachment hole (not shown) into which the support post 313a is inserted may have a vertical hole 77 and a horizontal hole 78, similar to the fence attachment part 35 described above.

[0093] In the above-described embodiment, an example of a fence member 12 having a retaining protrusion 67 as a retaining portion is shown. However, the retaining portion of the fence member is not limited to this. The first vertical bar forming portion 455 (vertical bar forming portion) of the fence member may be configured to have a hemispherical retaining protrusion 467 (retaining portion) that protrudes outward, as shown in FIG. 17. In other words, the retaining protrusion 467 formed on the fence member of this embodiment is a protrusion with a rounded curved surface, and is a protrusion that does not move forward or backward and is always positioned entirely outside. The first vertical bar forming portion 455 of this embodiment has a plurality of retaining protrusions 467 at positions that are at the same height (portions that are at the same position in the up-down direction) when in use. In detail, the retaining protrusions 467 are formed on one or more surfaces (four surfaces in this embodiment) of the four surfaces (plural surfaces) that form the outer circumferential surface of the first vertical bar forming portion 455 (one retaining protrusion 467 is not shown).

[0094] In this case, the fence mounting hole of the fence mounting portion may be a fence mounting hole 435 (fence member insertion portion) shown in FIG. 17(b) instead of the fence mounting hole 35a described above. The fence mounting hole 435 has a vertical hole portion 77 that has a substantially rectangular cross section and extends in the vertical direction, and a horizontal hole portion 478 that has an opening on the inner peripheral surface of the vertical hole portion 77. The number of horizontal holes 478 is the same as the number of retaining protrusions 467 provided on the portion of the first vertical bar forming portion 455 that is inserted into one of the fence mounting holes 435. Furthermore, the horizontal hole portion 478 is a hole (recess) that is substantially hemispherical (a shape similar to the retaining protrusions 467).

[0095] That is, when inserting the first vertical bar forming portion 455 into the fence mounting hole 435, inserting the first vertical bar forming portion 455 with a force equal to or greater than a certain level causes the first vertical bar forming portion 455 and / or the fence mounting hole 435 to temporarily elastically deform, and the first vertical bar forming portion 455 is inserted into the fence mounting hole 435. Similarly, when pulling the first vertical bar forming portion 455 out of the fence mounting hole 435, pulling it out with a force equal to or greater than a certain level causes the first vertical bar forming portion 455 and / or the fence mounting hole 435 to temporarily elastically deform, and the first vertical bar forming portion 455 is removed from the fence mounting hole 435. That is, the removal prevention portion of this embodiment restricts the relative movement of the first vertical bar forming portion 455 with respect to the fence mounting hole 435, and when an attempt is made to pull it out with a force less than a certain level, the first vertical bar forming portion 455 is prevented from moving relative to the fence mounting hole 435 more than a certain level. For this reason, the anti-slip portion of this embodiment can also prevent the fence member from unintentionally falling off the load receiving platform portion 11.

[0096] In addition, the mechanism for preventing the fence member from coming out may be composed of a fence-side horizontal hole portion 567 formed in the first vertical bar forming portion 555 (vertical bar forming portion), a platform-side horizontal hole portion 578 formed in the receiving platform main body portion 26, and a prevention member 579, as shown in Figure 18.

[0097] The fence-side horizontal hole portion 567 is a hole that penetrates the first vertical bar forming portion 555, and the extending direction of the fence-side horizontal hole portion 567 is the left-right direction when the fence member is in the used state. The receiving platform main body 26 has a fence mounting hole 535 (fence member insertion portion) into which the lower end portion of the first vertical bar forming portion 555 can be inserted. The fence mounting hole 535 has an opening in the receiving surface portion 33 and is a bottomed hole that extends in the thickness direction of the receiving platform main body 26. The platform-side horizontal hole 578 has an opening in an end face located at one end of the platform main body 26 in the left-right direction, and is a hole that extends in the left-right direction and extends intermittently in the portion where the fence mounting hole 535 is formed. In other words, the platform-side horizontal hole 578 has a first platform-side horizontal hole 578a that is formed from the end face of the platform main body 26 to the portion that reaches the fence mounting hole 535, and a second platform-side horizontal hole 578b that extends from the fence mounting hole 535 toward the other end of the platform main body 26 in the left-right direction.

[0098] The anti-pullout member 579 is a rod-shaped member that extends with a portion bent (curved) so that the entire member is approximately L-shaped, and has an anti-pullout member main body portion 579a that extends in a straight line and a hook-shaped protrusion portion 579b that extends in a direction that intersects with the anti-pullout member main body portion 579a (orthogonal in this embodiment). That is, the retaining member 579 is a member in which one longitudinal end of the retaining member main body 579a and one longitudinal end of the hook-shaped protrusion 579b are continuous via a bent portion (curved portion).

[0099] When attaching the fence member, the first vertical bar forming portion 555 is inserted into the fence attachment hole 535, and the first-station-side horizontal hole 578a, the fence-side horizontal hole 567, and the second-station-side horizontal hole 578b are lined up in this order from the outside in the left-right direction. In other words, the first-station-side horizontal hole 578a, the fence-side horizontal hole 567, and the second-station-side horizontal hole 578b form a series of communicating holes. In this state, the retaining member main body portion 579a of the retaining member 579 is inserted into this communication hole from the outside in the left-right direction of the receiving platform main body portion 26. This allows the fence member to be attached in a state where its relative movement with respect to the receiving platform main body portion 26 is restricted. Note that the platform-side horizontal hole portion 578 may be configured to have the first platform-side horizontal hole portion 578a but not the second platform-side horizontal hole portion 578b. However, from the viewpoint of more firmly restricting the movement of the fence member, the above-mentioned configuration is preferable.

[0100] In the above-described embodiment, an example was shown in which the fence mounting hole 35a was provided as a fence member insertion portion into which a portion of the fence member 12 can be inserted. However, the fence member insertion portion of the present invention is not limited to this. The fence mounting hole may be a hole with at least a portion of the bottom missing instead of a bottomed hole, or may be a through-hole that penetrates the load-receiving platform main body 26. In addition, instead of a hole formed in the loading platform main body 26, as shown in Figure 19, a fence mounting hole 635 (fence member insertion portion) may be formed on one end surface in the left-right direction of the loading platform main body 26 and surrounded by a fence mounting bracket 630 attached to the same end surface.

[0101] The fence mounting bracket 630 has two mounting plate portions 631 and a holding piece portion 632 positioned between the two mounting plate portions 631, which are integrally formed. The mounting plate portion 631 is an upright plate-like portion whose thickness direction is the same as the left-right direction. The holding piece 632 is located between the two mounting plate portions 631 and has a generally U-shaped cross section that extends in the up-down direction. Specifically, it has two standing plate portions 632a that protrude outward in the left-right direction and a connecting plate portion 632b that connects the protruding ends of the two standing plate portions. The base ends of the two standing plate portions 632a are each continuous with a different mounting plate portion 631. Furthermore, the connecting plate portion 632b has a protrusion insertion hole 678 that penetrates the connecting plate portion 632b in the thickness direction (left-right direction).

[0102] Based on the above, by bringing the two mounting plate portions 631 into face contact with the end faces of the receiving platform main body portion 26 and attaching the fence mounting bracket 630 to the end faces of the receiving platform main body portion 26, a fence mounting hole 635 is formed in the holding piece portion 632, surrounded on all sides by the end faces of the receiving platform main body portion 26. When attaching the fence member 612 to this cargo receiving platform portion 611 (load receiving platform), as shown in Figures 19 and 20, a portion of the lower end side of the first vertical bar forming portion 55 and a portion of the lower end side of the third vertical bar forming portion 57 are inserted into separate fence mounting holes 635.

[0103] 20, a portion of the abutment plate portion 61 is brought into contact with the load receiving surface portion 33 from above. The lower ends of the first vertical bar forming portion 55 and the third vertical bar forming portion 57 are positioned lower than the lower end of the fence mounting bracket 630 (which is also the lower end of the fence mounting hole 635 (see FIG. 19)). The removal prevention protrusion 67 is then protruded, with a portion of the removal prevention protrusion 67 positioned within the protrusion insertion hole 678. This results in the fence member 612 being attached to the load receiving platform portion 611. The fence member 612 is a member formed so that the arrangement positions of the members constituting the anti-pullout mechanism 62 are different from those of the fence member 12 described above, and furthermore, the abutment plate portion 61 is larger than that of the fence member 12 described above. In other words, the abutment plate portion 61 of the fence member 612 is longer in the left-right direction when in use than the abutment plate portion 61 of the fence member 12 described above.

[0104] Additionally, the fence member insertion portion of the present invention may also be formed by a metal fitting attached to the loading platform main body 26. That is, a metal fitting having an integral upright portion that contacts the loading platform main body 26 and a cylindrical portion that forms a square tube may be attached to one end of the loading platform main body 26 in the left-right direction, and the cylindrical portion of this metal fitting may be used as the fence member insertion portion. Furthermore, the fence member insertion portion is not limited to one that surrounds the entire periphery of a portion of the fence member located within the fence member insertion portion. For example, the vertical bar forming portion of the fence member may be a cylindrical portion, and instead of the cylindrical portion of the metal fitting described above, a holding portion (fence member insertion portion) with a generally C-shaped cross section may be provided. In other words, the fence member insertion portion has a portion that extends in the circumferential direction of the portion of the fence member (the portion to be inserted), and the circumferential extending portion may be continuous in an annular shape or discontinuous in an annular shape with a portion missing. It is sufficient that a portion of the fence member can be inserted and removed by moving the portion of the fence member in the opposite direction to the insertion direction.

[0105] The present invention is not limited to the above-described loading platform lifting device 1, but may also be, for example, a loading platform lifting device 801 (load platform elevator) as shown in FIG.

[0106] The receiving platform lifting device 801 of this embodiment has a lifting device main body consisting of a platform drive mechanism (lifting mechanism, detailed illustration omitted) and a receiving platform section 811 (receiving platform), and a plurality of fence members 12 that can be attached and detached to the receiving platform section 811 of the lifting device main body section.

[0107] The lifting device main body of this embodiment can be switched between a traveling state (see FIG. 21(a)) in which the vehicle 803 is traveling, and a working state (see FIG. 21(b)) in which cargo is being loaded and unloaded. Also, as shown in FIG. 22, in the working state, the cargo receiving platform 811 can be raised and lowered between an upper position (see FIG. 22(a)) and a lower position (see FIG. 22(b)).

[0108] As shown in Figure 21, the cargo receiving platform section 811 is a plate-shaped member that has a thickness in the front-to-back direction when in the traveling state (see Figure 21(a)) and a thickness in the up-to-down direction when in the working state (see Figure 21(b)). Here, in the vehicle 803 of this embodiment, a space in which luggage is placed is formed above a lower wall 807 (see FIG. 21(b)) that forms the floor surface, and between two side wall sections 808. When the vehicle is in a traveling state, the luggage receiving platform section 811 stands upright so as to cover the space in which luggage is placed from the rear.

[0109] The receiving platform 811 has a receiving surface 833 that forms a receiving surface on which luggage is placed. In this embodiment, the receiving surface 833 is the upper surface when the receiving platform 811 is in a working state. The receiving platform 811 also has a plurality of fence mounting portions 35 for mounting the fence members 12. As described above, the fence mounting portions 35 are composed of a plurality of fence mounting holes 35a, and the fence mounting holes 35a are holes that open in the receiving surface 833.

[0110] When the load receiving platform 811 is placed in the upper position during operation, the load receiving surface 833 is located at the same height as the floor (the upper surface of the lower wall 807) (see Figure 22(a)). In contrast, when the load receiving platform 811 is placed in the lower position during operation, the lower surface comes into contact with the ground or the like (see Figure 22(b)). The load receiving platform 811 can be raised and lowered freely between the upper position and the lower position, with the fence member 12 attached and with the fence member 12 removed.

[0111] Furthermore, the present invention may be a loading platform lifting device 901 (loading platform lifter) as shown in FIG.

[0112] The receiving platform lifting device 901 of this embodiment has a lifting device main body consisting of a platform drive mechanism (lifting mechanism, detailed illustration omitted) and a receiving platform section 811, and a plurality of fence members 12 that can be attached and detached to the receiving platform section 811 of the lifting device main body section.

[0113] The lifting device main body of this embodiment can also be switched between a traveling state (see FIG. 23(a)) in which the vehicle 903 is traveling, and a working state (see FIG. 23(b)) in which cargo is being loaded and unloaded. Also, as shown in FIG. 24, in the working state, the cargo receiving platform 811 can be raised and lowered between an upper position (see FIG. 23(a)) and a lower position (see FIG. 23(b)).

[0114] The receiving platform lifting device 901 has a platform drive mechanism that is different from the receiving platform lifting device 801. That is, in the above-described receiving platform lifting device 801, when the receiving platform part 811 is raised and lowered between the upper position and the lower position, the receiving platform part 811 slides up and down (see FIG. 22). That is, the lifting device main body of the receiving platform lifting device 801 is a so-called vertical lifting type lifting device. In contrast to this, in the loading platform lifting device 901 of this embodiment, when the loading platform section 811 is moved from the upper position to the lower position, the loading platform section 811 moves in an arc downward toward the rear as shown in Fig. 24. When the loading platform section 811 is moved from the lower position to the upper position, the loading platform section 811 moves in the opposite direction, upward toward the front.

[0115] Furthermore, the present invention may be a loading platform lifting device 1001 (loading platform lifter) as shown in FIG.

[0116] The receiving platform lifting device 1001 of this embodiment has a lifting device main body consisting of a platform drive mechanism (lifting mechanism, detailed illustration omitted) and a receiving platform part 1011 (receiving platform), and a plurality of fence members 12 that can be attached and detached to the receiving platform part 1011 of the lifting device main body part.

[0117] The lifting device main body of this embodiment can be switched between a traveling state (see FIG. 25(a)) in which the vehicle 1003 is traveling, and a working state (see FIG. 25(b)) in which cargo is being loaded and unloaded. Also, as shown in FIG. 26, in the working state, the cargo receiving platform 1011 can be raised and lowered between an upper position (see FIG. 26(a)) and a lower position (see FIG. 26(b)).

[0118] Here, the vehicle 1003 of this embodiment has a box-shaped cargo box main body 1004 with an open rear end. The lifting device main body of this embodiment is a cargo receiving platform lifting device that is so-called a backpack-type, and the cargo receiving platform 1011 functions as a blocking part that blocks a part of the open part at the rear of the cargo box main body 1004 when the vehicle is traveling.

[0119] As shown in Figure 25(b), the receiving platform 1011 has a receiving surface 1033 that forms a receiving surface on which luggage is placed. The receiving surface 1033 is the top surface of the receiving platform 1011 in the working state and the front surface in the traveling state. In other words, the receiving surface 1033 is the part that faces the internal space of the cargo box main body 1004 in the traveling state.

[0120] The receiving platform 1011 also has a plurality of fence mounting portions 35 for mounting the fence members 12. As described above, the fence mounting portions 35 are each composed of a plurality of fence mounting holes 35a, and the fence mounting holes 35a are holes that open in the receiving surface 1033.

[0121] When the load receiving platform 1011 is placed in the upper position during operation, the load receiving surface 1033 is located at the same height as the floor surface inside the container body 1004 (see Figures 25(b) and 26(a)). In contrast, when placed in the lower position during operation, at least a portion of the lower end comes into contact with the ground or the like (see Figure 26(b)). The load receiving platform 1011 can be raised and lowered freely between the upper and lower positions, with the fence member 12 attached and with the fence member 12 removed. [Explanation of symbols]

[0122] 1,101,801,901,1001 Loading platform lifting device (loading platform lifting machine) 3,803,903,1003 vehicles 10 Drive mechanism (lift mechanism) 11,611,811,1011 Receiving platform (receiving platform) 12,112,212,312,612 Fence members 12a, 212a, 312a 1st fence member 12b, 212b, 312b 2nd fence member 26a 1st unit component 26b Second unit component 33,833,1033 Load receiving surface 34 Back side forming part 35a, 435, 535, 635 Fence mounting hole (fence member insertion part) 67,467 Retaining protrusion (retaining part) 95 Cavity 213 Fence connecting members (regulating members) 313 Fence connecting members (regulating members)

Claims

1. A loading platform elevator that is mounted on a vehicle and forms part of the vehicle, The loading device includes a loading platform, a lifting mechanism for lifting the loading platform, and a fence member. The loading platform has a fence member insertion portion into which a part of the fence member can be inserted, The loading platform elevator, wherein the fence member is attached to the loading platform by inserting a portion of the fence member into the fence member insertion portion.

2. The receiving platform has a receiving surface portion that forms an upper surface on which luggage can be placed, The loading platform elevator according to claim 1 , wherein the fence member insertion portion is a bottomed hole having an opening in the loading surface portion.

3. The fence member has a retaining portion, The loading platform elevator according to claim 1 , wherein the fence member insertion portion has a recess or a hole that engages with the retaining portion.

4. The loading platform has a loading surface portion that forms an upper surface when the loading platform is capable of loading a load, and a back surface portion that forms a surface that faces the ground when the loading platform is in the same state, The fence member can be in a usable state in which a portion of the fence member is inserted into the fence member insertion portion and attached integrally to the loading platform, or in an unused state in which neither portion of the fence member is inserted into the fence member insertion portion, 2. The platform elevator according to claim 1, wherein the fence member in the unused state can be positioned adjacent to the outer side of the back surface forming portion.

5. The loading platform has a first platform component and a second platform component, and is switchable between a folded state in which the loading platform is folded so that at least a part of the second platform component is disposed above the first platform component, and an unfolded state in which the second platform component is rotated relative to the first platform component from the folded state and unfolded, The fence member can be in a usable state in which a portion of the fence member is inserted into the fence member insertion portion and attached integrally to the loading platform, or in an unused state in which neither portion of the fence member is inserted into the fence member insertion portion, The loading platform elevator according to claim 1, wherein in the folded state, a gap is formed between the first platform component and the second platform component in which the fence member in the unused state can be placed.

6. The loading platform has a first platform component and a second platform component, and is switchable between a folded state in which the loading platform is folded so that at least a part of the second platform component is disposed above the first platform component, and an unfolded state in which the second platform component is rotated relative to the first platform component from the folded state and unfolded, The system has a plurality of the fence members, and the plurality of fence members include a first fence member attached to the first unit component and a second fence member attached to the second unit component, Further, the control member is included.

2. The platform elevator according to claim 1, wherein a portion of the regulating member is connected to a portion of the first fence member, and another portion of the regulating member is connected to a portion of the second fence member.

Images