Conveying device

Abstract

To provide a conveying device whose luggage carrier can be varied in size, which is configured to prevent luggage loaded on the luggage carrier from being damaged.SOLUTION: A conveying device 100 is provided with: a tabular first luggage carrier part 1; a tabular second luggage carrier part 2, arranged adjacent in a first direction to the first luggage carrier part 1, which moves along the first direction relatively with respect to the first luggage carrier part 1; and an extendable / contractable luggage carrier part 3, connected with the first luggage carrier part 1 and the second luggage carrier part 2, which extends and contracts in the first direction. The first direction is a direction along a plate surface of the first luggage carrier part 1, and upper surfaces of the first luggage carrier part 1, the second luggage carrier part 2 and the extendable / contractable luggage carrier part 3 respectively are same in height.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a transport device. [Background technology]

[0002] In a carrier such as a pallet for carrying and transporting cargo such as tires for wheels that are shipped as products, or in a conveying device such as a dolly equipped with a carrier, it is necessary to place the cargo within the area of ​​the carrier. However, depending on the size and amount of the cargo, the area of ​​the carrier may be insufficient. Therefore, in conventional conveying devices, the size of the carrier may be variable, as disclosed in Patent Document 1 and Patent Document 2.

[0003] Patent Document 1 discloses an extendable transport dolly. This extendable transport dolly is equipped with a loading platform that has front and rear wheels and can run with luggage placed on the upper surface, and a handle provided on the rear side of the loading platform. In this extendable transport dolly, the loading platform is divided into a loading platform front half and a loading platform rear half that face each other, and each of the loading platform front half and the loading platform rear half has at least two or more longitudinal frames that are arranged at a predetermined interval in a horizontal direction perpendicular to the running direction and extend in the running direction. One of the longitudinal frames of the loading platform front half and the loading platform rear half is inserted into the other longitudinal frame, so that the loading platform can be extended and retracted in the running direction, and the length of the loading platform in the running direction can be adjusted.

[0004] Patent Document 2 discloses a telescopic dolly and a transport system including the telescopic dolly. The telescopic dolly is configured to be telescopic, and expands or reduces the loading area of ​​the load by expanding or contracting. The telescopic dolly includes a main dolly section, an auxiliary dolly section that is movably connected to the main dolly section, forms a loading area together with the main dolly section, and expands or reduces the loading area by moving away from or approaching the main dolly section, and a connecting mechanism section that connects the main dolly section and the auxiliary dolly section to each other. The connecting mechanism section is configured to move the auxiliary dolly section away from the main dolly section due to the action of the auxiliary dolly section from the load carried onto the loading area. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-137036 A [Patent Document 2] JP 2019-96737 A Summary of the Invention [Problem to be solved by the invention]

[0006] In conventional conveying devices, the arrangement of the mechanism for changing the size of the loading platform may result in large unevenness on the top surface of the loading platform. For this reason, when placing an item made of a soft material such as a rubber tire, the item may be scratched by rubbing against the unevenness or may be left with scratches such as traces of the unevenness. Therefore, it is desired to provide a conveying device that is less likely to scratch the item placed on the loading platform.

[0007] The present disclosure has been made in consideration of the above-mentioned circumstances, and its purpose is to provide a conveying device that allows the size of the loading platform to be adjustable while preventing damage to luggage placed on the loading platform. [Means for solving the problem]

[0008] In order to achieve the above object, a conveying device according to the present disclosure is as follows.

[0009] [1] A plate-shaped first loading platform portion; a plate-shaped second loading platform portion adjacent to the first loading platform portion in a first direction and movable relative to the first loading platform portion along the first direction; an extendable loading platform portion that connects the first loading platform portion and the second loading platform portion and extends and contracts in the first direction; The first direction is a direction along a plate surface of the first loading platform portion, A conveying device in which the top surfaces of the first loading platform portion, the second loading platform portion and the extendable loading platform portion are all at the same height.

[0010] [2] The telescopic loading platform section is: A plurality of first comb teeth portions formed at an end portion of the first loading platform portion and extending along the first direction; a plurality of second comb teeth portions formed at an end portion of the second loading platform portion and extending along the first direction; The second comb tooth portion is The first comb tooth portion is meshed with and supported by the first comb tooth portion, The first comb tooth portion is slidable along the first direction, The conveying device described in [1] above, wherein the upper surfaces of the first loading platform portion, the second loading platform portion, the first comb tooth portion and the second comb tooth portion are all at the same height.

[0011] [3] The conveying device described in [2] above, wherein the extendable platform portion has a rail mechanism that allows relative movement between the first comb tooth portion and the second comb tooth portion along the first direction and prohibits relative movement in a direction intersecting the first direction.

[0012] [4] A conveying device described in any one of [1] to [3] above, further comprising a caster arranged below the first loading platform portion and supporting the first loading platform portion.

[0013] [5] A conveying device described in any one of [1] to [4] above, further comprising a locking mechanism that prohibits relative movement of the second loading platform portion. Effect of the Invention

[0014] According to the present disclosure, it is possible to provide a conveying device that allows the size of the loading platform to be changed while preventing damage to luggage placed on the loading platform. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a perspective view of a transport device according to the embodiment. [Diagram 2]FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] 6 is a cross-sectional view taken along line VI-VI of FIG. 2. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 2. [Figure 8] FIG. 13 is a side view of the loading platform, illustrating the state in which the locking mechanism is in the extension / contraction permitted state. [Figure 9] FIG. 2 is a top view of the transport device according to the embodiment. [Figure 10] FIG. 2 is a side view of the transport device according to the embodiment when folded. [Figure 11] FIG. 2 is a top view of the transport device according to the embodiment when folded. [Figure 12] FIG. 2 is a bottom view of the transport device according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] A conveying device according to an embodiment of the present disclosure will be described with reference to the drawings.

[0017] 1 shows a perspective view of a conveying device 100 according to this embodiment. First, an overview of the conveying device 100 will be described.

[0018] The conveying device 100 includes a plate-shaped first platform portion 1, a plate-shaped second platform portion 2 adjacent to the first platform portion 1 in a first direction and moving along the first direction relative to the first platform portion 1, and an extendable platform portion 3 connecting the first platform portion 1 and the second platform portion 2 and extending and contracting in the first direction. The top surfaces of the first platform portion 1, the second platform portion 2, and the extendable platform portion 3 are all at the same height. The first direction is a direction along the plate surface of the first loading platform portion 1.

[0019] In the conveying device 100, the top surfaces of the first loading platform section 1, the second loading platform section 2 and the extendable loading platform section 3 are all at the same height, so that the size of the loading platform can be changed while preventing damage to luggage placed on the loading platform.

[0020] The conveying device 100 will be described in detail below. The conveying device 100 is a device used for conveying luggage such as tires, such as a loading platform such as a pallet or a cart equipped with a loading platform. In this embodiment, the conveying device 100 is described as a cage cart as shown in FIG. 1.

[0021] The conveying device 100 comprises a rectangular platform portion T, a fence portion 5 arranged along sides 71, 72, and 73 (see Figure 2) of the platform portion T and extending upward, and a plurality of casters 9 supporting the platform portion T and the fence portion 5.

[0022] The loading platform T is a plate-like base on which luggage is placed (loaded), and its plate surface (upper surface described later) is the loading platform. The loading platform T has a first loading platform 1, a second loading platform 2 adjacent to the first loading platform 1, an extendable loading platform 3 that connects the first loading platform 1 and the second loading platform 2 and allows the second loading platform 2 to move in a first direction relative to the first loading platform 1, and a lock mechanism 4 that switches between an extendable / retractable state that prohibits the relative movement between the first loading platform 1 and the second loading platform 2 and an extendable / retractable state that allows the relative movement between the first loading platform 1 and the second loading platform 2. The loading platform T is rectangular in top view. In this embodiment, the top view refers to a viewpoint that looks down from above along the vertical direction.

[0023] When luggage is placed on the platform T or when luggage is to be placed on the platform T (hereinafter, sometimes referred to as "when in use"), the platform T is arranged so that its plate surface (the upper surface described below) is aligned horizontally. Hereinafter, the upper surface in the vertical direction of the platform T when luggage is placed on it is referred to as the "upper surface," and the same applies to the first platform portion 1, the second platform portion 2, the expandable platform portion 3, and each of these portions of the platform portion T.

[0024] In this embodiment, the first direction is a direction along the plate surface of the first loading platform portion 1 in the loading platform portion T, and is a direction perpendicular to two of the four sides 71, 74 of the loading platform portion T (see FIG. 2).

[0025] The first loading platform portion 1 is a part of the loading platform portion T. The first loading platform portion 1 is a plate-like platform having a rectangular shape surrounded by vertices of an outer periphery in a top view.

[0026] Fig. 2 shows a top view of the platform portion T. Figs. 3 to 5 show side views of the platform portion T in a direction intersecting with the first direction (side views seen from a direction intersecting with the first direction). As shown in Fig. 2, the first platform portion 1 has a rectangular rotatable platform portion 15 arranged adjacent to the fixed platform portion 10 in the first direction, and a platform rotation shaft portion 6 that intersects with the first direction and supports the rotatable platform portion 15 on a rotation shaft along the plate surface of the fixed platform portion 10 so that the rotatable platform portion 15 can be folded upward.

[0027] When in use, the first loading platform 1 is disposed so that its upper surface is aligned horizontally. When not in use, for example, when the transport device 100 is stored or transported, the rotating platform 15 of the first loading platform 1 can be rotated upward relative to the fixed platform 10 to reduce the width in the first direction when viewed from above. This allows the loading platform T to be made smaller when not in use, thereby making it possible to reduce the size of the transport device 100 when not in use.

[0028] The fixed base 10 is a plate portion at one end of the platform T in the first direction. The fixed base 10 is a rectangular plate-like platform when viewed from above. In the following description, the same direction as the rotating platform 15 in the first direction as viewed from the fixed base 10 is referred to as the front or forward. Also, the same direction as the fixed base 10 in the first direction as viewed from the rotating platform 15 is referred to as the rear or rear. In other words, the side where the fence 5 is not arranged and the side 74 (see FIG. 2) of the platform T that intersects with the first direction is the front, and the side 71 is the rear. In FIG. 1, the first direction is indicated as direction d, the front as direction d1, and the rear as direction d2. The upper surface of the fixed base 10 is arranged along the horizontal direction.

[0029] The rotating table section 15 is a plate portion that is disposed adjacent to the front of the fixed table section 10 in the loading platform section T. The rotating table section 15 is a plate-like base that has a rectangular shape surrounded by the vertices of the outer periphery when viewed from above. The upper surface of the rotating table section 15 is at the same height as the upper surface of the fixed table section 10. In other words, the upper surface of the rotating table section 15 is on the same plane as the upper surface of the fixed table section 10.

[0030] The rotating platform 15 is disposed with its rear edge aligned along the front edge of the fixed platform 10. The rear end of the rotating platform 15 is connected to the front end of the fixed platform 10 via the platform rotating shaft 6.

[0031] The loading platform pivot shaft portion 6 is a pivot shaft mechanism in which the fixed platform portion 10 supports the pivot platform portion 15 at the rear end portion of the pivot platform portion 15 and allows the pivot platform portion 15 to pivot.

[0032] 3, an example of the platform rotation shaft 6 is a hinge having a rotation shaft 60 composed of a blade 61 fixed to the upper surface of the fixed base 10, a blade 62 fixed to the upper surface of the rotating base 15, a tube portion of the blade 61, a tube portion of the blade 62, and a core rod inserted into these tube portions. In the following, a case where the platform rotation shaft 6 is the above-mentioned hinge will be described as an example.

[0033] The rotating shaft 60 may be disposed along the plate surface of the loading platform T (fixed platform 10) and intersect with the first direction (perpendicular to the first direction in this embodiment). This allows the rotating platform 15 to rotate by lifting the front end of the rotating platform 15 upward.

[0034] In the first loading platform 1, the rotating platform 15 is arranged so that its upper surface is aligned horizontally when in use, as shown in Fig. 3. When not in use, for example when the transport device 100 is stored or transported, the first loading platform 1 can be folded by rotating the front end portion of the rotating platform 15 upward around a rotation shaft 60 as the center of rotation, as shown in Fig. 4. When the first loading platform 1 is folded, for example, the upper surface of the rotating platform 15 may be aligned vertically.

[0035] As shown in Figures 3 and 4, the platform rotation shaft 6 may be disposed on the upper surface side of the first platform 1. The upper surface of the platform rotation shaft 6 may be at the same height as the upper surfaces of the fixed base 10 and the rotating base 15. This makes it difficult for the luggage placed on the platform T to be scratched. In more detail, if the heights of the upper surfaces of the fixed base 10, the rotating base 15, and the platform rotation shaft 6 are different, the resulting unevenness may scratch the luggage placed on the platform T, but by making the heights of the upper surfaces of the fixed base 10, the rotating base 15, and the platform rotation shaft 6 the same, it is possible to avoid scratching the luggage.

[0036] In this embodiment, the upper surfaces of the fixed base 10 and the rotating base 15 and the upper surfaces of the blades 61, 62 are at the same height, and these upper surfaces are flush. The rotating shaft 60 is disposed on the lower surface side of the blades 61, 62, and is disposed lower than the upper surfaces of the fixed base 10 and the rotating base 15. In this embodiment, a recess is formed in the upper surfaces of the fixed base 10 and the rotating base 15 to accommodate the blades 61, 62 and the rotating shaft 60, thereby making the upper surface of the platform rotating shaft 6 flush with the upper surfaces of the fixed base 10 and the rotating base 15.

[0037] The second loading platform portion 2 is a part of the loading platform portion T. When viewed from above, the second loading platform portion 2 is a plate-shaped platform with an approximately rectangular outer periphery. The second loading platform portion 2 is arranged adjacent to the first loading platform portion 1 at its front in the first direction. In this embodiment, edge portion 74 of loading platform portion T, which is an open side portion where no fence portion 5 is arranged, is the front side portion of the second loading platform portion 2. The second loading platform portion 2 is adjacent to the first loading platform portion 1 on the side opposite edge portion 74, which is the open side portion, in the first direction.

[0038] The second loading platform 2 is movable relative to the first loading platform 1 in a first direction when the locking mechanism 4 is in an extension / retraction permitted state, which will be described later. The top surface of the second loading platform 2 is at the same height as the top surface of the first loading platform 1. In other words, the top surface of the second loading platform 2 is on the same plane as the top surface of the first loading platform 1.

[0039] The extendable platform section 3 connects the first platform section 1 and the second platform section 2, and is a part of the platform section T that extends and retracts in a first direction. In this embodiment, the extendable platform section 3 includes a part of the first platform section 1 on a side facing the second platform section 2, a part of the second platform section 2 on a side facing the first platform section 1, and a locking mechanism 4.

[0040] In this embodiment, a plurality of first comb teeth 31 extending forward along a first direction are formed on the front end of the rotating platform 15 as components of the extendable platform 3. Adjacent first comb teeth 31, 31 may be disposed at equal intervals, for example.

[0041] In addition, a plurality of second comb-tooth portions 32 extending rearward along the first direction are formed at the rear end of the second loading platform portion 2 as components of the extendable loading platform portion 3. Adjacent second comb-tooth portions 32, 32 may be disposed at equal intervals, for example.

[0042] When the second loading platform section 2 is adjacent to the first loading platform section 1, each of the second comb-tooth portions 32 is disposed between the first comb-tooth portions 31, 31 and is in a meshed state. In the extendable loading platform section 3, the second comb-tooth portions 32 are moved relative to the first comb-tooth portions 31 along the first direction to expand or contract the width in the first direction, thereby enabling the second loading platform section 2 to move relative to the first loading platform section 1 along the first direction. That is, in the extendable loading platform section 3, the second comb-tooth portions 32 slide along the first direction relative to the first comb-tooth portions 31, thereby enabling the second loading platform section 2 to move closer to (see FIG. 3) or farther away from (see FIG. 5) the first loading platform section 1, thereby enabling the size of the loading platform section T to be reduced or expanded.

[0043] In this embodiment, the second loading platform section 2 is supported on the first loading platform section 1 via the extendable loading platform section 3. In detail, as shown in Fig. 6, the extendable loading platform section 3 is formed with a rail mechanism L that allows relative movement between the first comb tooth section 31 and the second comb tooth section 32 along a first direction and prohibits relative movement in a direction intersecting the first direction. Note that Fig. 6 shows a cross-sectional view taken along the line VI-VI shown in Fig. 2.

[0044] The rail mechanism L may be composed of, for example, a convex portion 31a extending laterally from a side portion of the first comb-tooth portion 31 and extending along the first direction, and a groove portion 32a which is a recess formed in a side portion of the second comb-tooth portion 32 and extends along the first direction. In this case, in the rail mechanism L, the convex portion 31a is fitted into the groove portion 32a and the convex portion 31a is caused to slide in the first direction along the groove portion 32a, thereby realizing the sliding movement of the second comb-tooth portion 32 relative to the first comb-tooth portion 31 in the extendable platform portion 3.

[0045] In the rail mechanism L, both side portions of the first comb tooth portion 31 are restrained by the adjacent second comb tooth portions 32, 32, and the first comb tooth portion 31 is prohibited from moving sideways (one example of a direction intersecting with the first direction) relative to the second comb tooth portion 32. Similarly, in the rail mechanism L, both side portions of the second comb tooth portion 32 are restrained by the adjacent first comb tooth portions 31, 31, and the second comb tooth portion 32 is prohibited from moving sideways (another example of a direction intersecting with the first direction) relative to the first comb tooth portion 31.

[0046] In addition, in the rail mechanism L, the convex portion 31a of the adjacent first comb tooth portion 31 and the groove portion 32a of the second comb tooth portion 32 engage with each other, thereby prohibiting the first comb tooth portion 31 and the second comb tooth portion 32 from moving relative to each other in the vertical direction (which is the same as the out-of-plane direction of the extendable loading platform portion 3, and is another example of a direction intersecting the first direction).

[0047] As shown in FIG. 2, the upper surface of the extendable loading platform section 3 is at the same height as the upper surfaces of the first loading platform section 1 and the second loading platform section 2. More specifically, the upper surfaces of the first comb tooth section 31 and the second comb tooth section 32 are at the same height as the upper surfaces of the first loading platform section 1 and the second loading platform section 2. In this embodiment, the upper surfaces of the first loading platform section 1, the second loading platform section 2, the first comb tooth section 31 and the second comb tooth section 32 are flush with each other. In this way, by making the upper surface of the extendable loading platform section 3 at the same height as the upper surfaces of the first loading platform section 1 and the second loading platform section 2 to prevent unevenness in the extendable loading platform section 3, luggage placed on the loading platform section T is less likely to be scratched.

[0048] As described above, the locking mechanism 4 is a mechanism that prohibits or allows relative movement of the second loading platform portion 2 in the first direction relative to the first loading platform portion 1. In this embodiment, the specific structure of the locking mechanism 4 is not important as long as it can lock the second loading platform portion 2 to the first loading platform portion 1, maintain the locked state, and release the locked state as necessary.

[0049] FIG. 7 shows a cross-sectional view taken along the line VII-VII shown in FIG. 2. FIG. 8 shows a side view of the loading platform T (a side view seen from a direction intersecting the first direction) illustrating a case where the locking mechanism 4 is in an extension / retraction permitted state. As shown in FIG. 7 and FIG. 8, the locking mechanism 4 may have a locking hole 49 for positioning provided in the second loading platform 2 and a locking pin 41 for positioning provided in the first loading platform 1. When the locking pin 41 is inserted into the locking hole 49, the locking mechanism 4 is in an extension / retraction prohibited state in which relative movement between the first loading platform 1 and the second loading platform 2 is prohibited. When the locking pin 41 is removed from the locking hole 49, the locking mechanism 4 is in an extension / retraction permitted state in which relative movement between the first loading platform 1 and the second loading platform 2 is permitted. The locking mechanism 4 will be described in detail below.

[0050] 7 and 8 show a case in which the locking mechanism 4 has a plate-shaped lid portion 40 that is rotatably fixed at its front end to a rotation shaft 40a along a direction intersecting the first direction on the upper surface of the first loading platform portion 1, and the locking pin 41 extends from the lower surface of the lid portion 40. As an example, the lid portion 40 is rectangular in a top view. The lid portion 40 may be disposed such that its longitudinal direction is aligned with the first direction.

[0051] The lid portion 40 may be disposed, for example, on an upper surface of the first comb-tooth portion 31. Fig. 2 shows a case where the lid portion 40 is disposed on the comb-tooth portion 33, which is the first comb-tooth portion 31 located on both sides of the first loading platform portion 1.

[0052] As an example, the locking hole 49 may be a through hole as shown in Fig. 7. For example, as shown in Fig. 2, the locking hole 49 may be formed as a through hole that penetrates the plate surface of the locking plate 34 in the vertical direction, which is provided in addition to the second comb-tooth portion 32 and extends forward from the rear end of the second loading platform 2 along the first direction. Figs. 2, 3, 5 and 8 show an example in which the locking plate 34 is a plate-like member whose plate surface is along the plate surface of the first loading platform 1 and is thinner than the comb-tooth portion 33, and in which a plurality of locking holes 49 are formed along the first direction.

[0053] 3, 5, 7, and 8, the comb-tooth portion 33 may be formed with an insertion hole 33a through which the locking plate portion 34 is inserted, and a pin through hole 4b that passes through in the up-down direction from the upper surface of the locking plate portion 34 to the insertion hole 33a. Also, the upper surface of the comb-tooth portion 33 may be formed with a recess 4a that accommodates the locking plate portion 34.

[0054] The insertion hole 33a may be formed in the first direction from the front end of the comb-tooth portion 33 in the first direction toward the rear, so that when the extendable platform portion 3 is extended or retracted, the lock plate portion 34 is slidable in the insertion hole 33a in the first direction.

[0055] 3 and 5, when the cover 40 is closed and the lock pin 41 is inserted into the locking hole 49 through the pin through hole 4b, the lock mechanism 4 is in an extension / retraction prohibited state. When the lock mechanism 4 is in an extension / retraction prohibited state, relative movement between the first loading platform 1 and the second loading platform 2 is prohibited, so that luggage can be stably placed on the loading platform T.

[0056] When the locking mechanism 4 is in the extension / retraction prohibited state, the locking plate 34 is parallel to the upper surfaces of the first loading platform 1 and the second loading platform 2, and is housed in the recess 4a. The recess 4a may be deep enough to house the locking plate 34 and make the upper surface of the locking plate 34 flush with the upper surface of the comb-tooth portion 33. The recess 4a may also house the rotating shaft 40a. In this case, the upper surface of the rotating shaft 40a may be flush with the upper surface of the comb-tooth portion 33. That is, in the extension / retraction prohibited state, it is preferable that the upper surfaces of the first loading platform 1, the second loading platform 2, and the locking mechanism 4 are all at the same height. This makes it difficult for luggage placed on the loading platform T to be scratched.

[0057] 8, when the lid 40 is open and intersects with the top surfaces of the first and second loading platform portions 1 and 2, and the lock pin 41 is removed from the locking hole 49, the locking mechanism 4 is in an extension / retraction permitted state. When the locking mechanism 4 is in the extension / retraction permitted state, the extendable loading platform portion 3 is extendable and retractable, allowing relative movement between the first and second loading platform portions 1 and 2, making it possible to increase or decrease the size of the loading platform portion T. In other words, when the locking mechanism 4 is in the extension / retraction permitted state, the size of the loading platform portion T can be adjusted by moving the second loading platform portion 2 according to the size and amount of luggage to be placed on the loading platform portion T.

[0058] When the locking mechanism 4 is in the extension / retraction permitted state, the lid 40 is supported by the pivot shaft 40a and is in an open state. In this case, the opening angle α of the lid 40 is preferably 90° or less at most. For example, when carrying and placing a load on the loading platform T from the front of the loading platform T, it is assumed that the user forgets to switch the locking mechanism 4 to the extension / retraction prohibited state in advance. However, in this embodiment, the pivot shaft 40a is disposed in the lid 40 so as to face the side 74, which is the open side portion where the fence 5 is not disposed, and supports the front end of the lid 40. As a result, if the opening angle α of the lid 40 is 90° or less, even if the load comes into contact with the lid 40 when the load is carried and placed on the loading platform T from the front of the loading platform T, the lid 40 will close naturally. Therefore, the lid 40 will not damage the load. In addition, since the locking mechanism 4 is switched to the extension / retraction prohibited state when luggage is placed on the platform T, even if one forgets to switch the locking mechanism 4 to the extension / retraction prohibited state in advance and places luggage on the platform T, it may be possible to prevent problems such as the second platform 2 moving and the luggage collapsing.

[0059] Fig. 9 shows a top view of the conveying device 100. As shown in Fig. 9, the fence portion 5 is a fence that is arranged outside the plane of the loading platform portion T in a top view, and is arranged along the sides 71, 72, and 73 (see Fig. 2) of the loading platform portion T and extending upward. The fence portion 5 has a back side fence portion 51 and side side fence portions 52 and 53 that are arranged along the sides 71, 72, and 73, respectively.

[0060] The rear side fence portion 51 is a fence arranged along the side portion 71 and behind the loading platform portion T.

[0061] The side fences 52, 53 are fences arranged on the sides of the loading platform T along the sides 72, 73 of the loading platform T that are aligned in the first direction. The side fences 52, 53 are adjacent to the rear fence 51 and have fixed fences 52a, 53a that are fixed in position, and movable fences 52b, 53b that are rotatably supported by pivots 52c, 53c such as hinges fixed to the fixed fences 52a, 53a. The pivots of the pivots 52c, 53c are aligned in the vertical direction. The pivots 52c, 53c allow the movable fences 52b, 53b to rotate in a direction that faces the front surface of the rear fence 51. That is, the portions of the side fence portions 52, 53 that run along the rotating platform portion 15 are capable of being folded toward the inside of the loading platform portion T by the rotating shafts 52c, 53c.

[0062] Fig. 10 shows a side view (a side view seen from a direction intersecting the first direction) of the carrier device 100 when folded. Fig. 11 shows a top view of the carrier device 100 when folded. As shown in Figs. 10 and 11, the carrier device 100 can fold the carrier part T by lifting the front end of the rotating platform part 15 upward together with the second carrier part 2 by rotating the rotating platform part 15 of the carrier part T. When the carrier part T is folded, the rotating platform part 15 and the second carrier part 2 are aligned along the rear side fence part 51.

[0063] In addition, when the loading platform portion T is folded, the conveying device 100 can further fold the movable fence portions 52b, 53b of the side fence portions 52, 53 by rotating them in a direction facing the front surface of the rear fence portion 51.

[0064] The conveying device 100 can be made compact by folding up the loading platform T and the side fences 52, 53. This allows the main body of the conveying device 100, including the loading platform, to be made smaller, for example, when not in use.

[0065] Fig. 12 shows a bottom view of the transport device 100. As shown in Figs. 1 and 12, the transport device 100 may include a plurality of casters 9 that support the loading platform portion T and the fence portion 5. The casters 9 are disposed below the loading platform portion T.

[0066] 12 shows a case in which the first loading platform portion 1 has its sides supported by the lower frames of the fixed fence portions 52a, 53a of the side fence portions 52, 53, and the fixed fence portions 52a, 53a are each supported by two casters 9 (four in total). In this embodiment, of the casters 9 supporting the fixed fence portions 52a, 53a, the rear caster 9 is a fixed wheel 91, and the front caster 9 is a free wheel 92.

[0067] FIG. 12 also shows a case in which the lower surface of the front side of the rotating platform unit 15 is supported by two casters 9 (free wheels 93 in this embodiment).

[0068] In addition, in the first loading platform 1, the rotating platform 15 is foldable by the loading platform rotating shaft 6, and the fixed platform 10 is supported by the casters 9 directly or indirectly via the fixed fences 52a and 53a. In this way, the load on the loading platform rotating shaft 6 when a load is placed on the loading platform T is reduced compared to the load on the other rotating shaft, for example, when the first loading platform 1 is supported by the rear fence 51 so as to be rotatable by another rotating shaft and the front is lifted to be foldable. Therefore, the support structure of the first loading platform 1 by the casters 9 and the folding structure of the first loading platform 1 by the loading platform rotating shaft 6 in this embodiment are strong and durable. In other words, by supporting the first loading platform 1 by the casters 9 without using a structure such as a rotating shaft, the support structure of the first loading platform 1 by the casters 9 and the folding structure of the first loading platform 1 are strong and durable.

[0069] The conveying device 100 described above and shown in FIG. 1 and the like is suitable for conveying cargo such as tires. Tires vary in size (diameter) depending on the use of the tire. In the conveying device 100, the size of the loading platform T is adjusted by sliding the second loading platform 2 according to the size of the tire, and it is possible to avoid accidents such as leaving extra space on the loading platform T, which would make tire conveyance inefficient, or the tire protruding from the loading platform T, which could result in damage to the tire, or transport work in a dangerous condition.

[0070] In the conveying device 100, while the second loading platform 2 is slidable, the upper surface of the loading platform T is designed to be smooth and uneven, preventing damage to the tire. The second loading platform 2 can be freely switched between an extension-prohibited state in which sliding movement is prohibited and an extension-permitted state in which sliding movement is permitted by the locking mechanism 4, making it easy to use. Moreover, even if a tire is placed on the loading platform T without switching the locking mechanism 4 to the extension-prohibited state, the lid 40 of the locking mechanism 4 is disposed on the upper surface of the loading platform T, so that the locking mechanism 4 automatically switches to the extension-permitted state when the tire is placed on the loading platform T, making it safe.

[0071] Furthermore, when the transport device 100 is not in use, such as when it is stored, the loading platform T and the fence 5 can be folded up to make the entire device compact. For example, when tires are placed on the transport device 100 and the transport device 100 is loaded onto a truck or the like, and only the tires are unloaded at the collection destination, it is necessary to take only the transport device 100 back to the shipping source, such as a factory, by truck. However, since the transport device 100 can be folded up and made compact when stored, it is economical because the number of trucks required to take the transport device 100 back can be reduced compared to the number of trucks required to ship the tires.

[0072] In addition, in the conveying device 100, the fence section 5 is not provided on the front side, and the loading platform section T has an entrance section for luggage with the side of the side section 74 open. When luggage such as tires is placed on the conveying device 100, it is advisable to tie or surround the front side of the conveying device 100 with a belt-like member such as a lashing belt, a string-like member such as a rope, a net-like member, or a sheet-like member to prevent the luggage from falling. It is not excluded to provide another fence-like member that surrounds the front side of the conveying device 100 on the front side of the fence section 5, specifically, on the front end of the side fence sections 52, 53.

[0073] As described above, the conveying device according to the present disclosure can provide a conveying device that allows the size of the loading platform to be variable while preventing damage to luggage placed on the loading platform.

[0074] [Another embodiment] (1) In the above embodiment, the locking mechanism 4 has a positioning locking hole 49 in the second loading platform 2 and a positioning lock pin 41 in the first loading platform 1, and the locking mechanism 4 has a plate-shaped lid 40 whose front end is rotatably fixed to the upper surface of the first loading platform 1 by a rotation shaft 40a along a direction intersecting the first direction. In the transport device 100, the relationship between the first loading platform 1 and the second loading platform 2 in terms of the arrangement of the components of the locking mechanism 4 may be the opposite of that described in the above embodiment.

[0075] (2) In the above embodiment, for example, the second loading platform portion 2 is not supported by casters. However, the second loading platform portion 2 may be supported by casters.

[0076] Note that the embodiments disclosed in this specification are merely examples, and the embodiments of the present disclosure are not limited thereto, and may be modified as appropriate within the scope of the purpose of the present disclosure. [Industrial Applicability]

[0077] The present disclosure is applicable to a transport device. [Explanation of symbols]

[0078] 1: First loading platform 10:Fixed base 100: Transport device 15: Rotating table section 2: Second loading platform 3: Expandable loading platform 31: First comb tooth part 31a: Convex part 32: Second comb tooth part 32a:Groove 33: Comb teeth part 33a: Insertion hole 34: Lock plate part 4: Locking mechanism 40: Lid 40a: Rotating shaft 41: Lock pin 49: Locking hole 4a: Recess 4b: Pin through hole 5: Fence part 51: Rear side fence part 52: Side fence part 52a: Fixed fence part 52b: Working fence section 52c: Rotating shaft 53: Side fence part 53a: Fixed fence part 53b: Working fence section 53c: Rotating shaft 6: Platform rotation shaft 60: Rotation axis 61: Feather 62: Feather 71: Edge 72: Edge 73: Edge 74: Edge 9: Caster L: Rail mechanism T: Loading platform d: direction d1: direction d2: direction α: Opening angle

Claims

1. A plate-shaped first loading platform portion; a plate-shaped second loading platform portion adjacent to the first loading platform portion in a first direction and movable relative to the first loading platform portion along the first direction; an extendable loading platform portion that connects the first loading platform portion and the second loading platform portion and extends and contracts in the first direction; The first direction is a direction along a plate surface of the first loading platform portion, A conveying device in which the top surfaces of the first loading platform portion, the second loading platform portion and the extendable loading platform portion are all at the same height.

2. The extendable loading platform portion is A plurality of first comb teeth portions formed at an end portion of the first loading platform portion and extending along the first direction; a plurality of second comb teeth portions formed at an end of the second loading platform portion and extending along the first direction; The second comb tooth portion is The first comb tooth portion is meshed with and supported by the first comb tooth portion, The first comb tooth portion is slidable along the first direction, The conveying device according to claim 1 , wherein upper surfaces of the first loading platform portion, the second loading platform portion, the first comb-tooth portion and the second comb-tooth portion are all at the same height.

3. The conveying device according to claim 2, wherein the extendable platform portion has a rail mechanism that allows relative movement between the first comb tooth portion and the second comb tooth portion along the first direction and prohibits relative movement in a direction intersecting the first direction.

4. The conveying device according to claim 1 , further comprising a caster disposed below the first loading platform portion and supporting the first loading platform portion.

5. The conveying device according to claim 1 , further comprising a locking mechanism that prohibits relative movement of the second platform portion.

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