Conveyance carriage

Abstract

To provide a conveyance carriage that can be easily and properly fixed to a predetermined position on a travel surface.SOLUTION: A conveyance carriage 1 capable of traveling with a conveyance object W mounted thereon includes: a travel part 3 configured to travel along a travel surface F; and engagement parts 4 engageable with anchors A protruding from the travel surface F by movement in the own traveling direction. The engagement parts 4 each include a first engagement part 4A and a second engagement part 4B that are disposed on the bottom of a load carrying platform 2 at different positions from each other in the vehicle width direction orthogonal to the own traveling direction and respectively engageable with the corresponding anchors A.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a transport vehicle, and more particularly to a transport vehicle capable of traveling with an article placed thereon. [Background technology]

[0002] Patent Document 1 discloses a transport cart capable of carrying an object and traveling on a floor surface. This transport cart is configured such that a plurality of casters serving as traveling wheels and a hammer lock type stopper are attached to the bottom surface of the platform. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-16779 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration described in Patent Document 1, the stopper is configured to grip the floor surface by lifting the caster off the floor surface. Therefore, it is difficult to fix the transport cart in an appropriate position relative to the floor surface on which it runs. Therefore, the present invention provides a transport cart that can be easily and accurately fixed to a predetermined position on the running surface. [Means for solving the problem]

[0005] In order to solve the above problems, the transport vehicle of the present invention employs the following means.

[0006] In other words, the first invention of the present invention is a transporting cart that can run with a transported object placed on it, and has a running part that runs along a running surface, and an engaging part that engages with an engaged part protruding from the running surface by moving in the direction of travel of the vehicle, and the engaging part has a first engaging part and a second engaging part that are arranged at the bottom of the cart body, shifted from each other in the vehicle width direction perpendicular to the direction of travel of the vehicle, and are individually engaged with the corresponding engaged part.

[0007] According to the first aspect of the present invention, the first and second engaging parts can be engaged with the corresponding engaged parts by moving in the travel direction of the vehicle without hitting the non-corresponding engaged parts. Therefore, the transport vehicle can be easily and accurately fixed to a predetermined position on the travel surface.

[0008] The second invention of the present invention is a transporting cart according to the first invention above, wherein the running part is positioned offset in the direction of travel of the vehicle from the first engagement part and / or the second engagement part, and is also positioned offset in the vehicle width direction from the first engagement part and / or the second engagement part, which are positioned offset in the direction of retreat of the vehicle.

[0009] According to the second invention, by moving in the vehicle travel direction, the first engagement portion and / or the second engagement portion, which are positioned offset in the vehicle retreat direction of the traveling portion, can be appropriately engaged with the corresponding engaged portion without the traveling portion hitting the engaged portion.

[0010] A third invention of the present invention is a transport cart according to the first or second invention, which has a locking mechanism for releasably locking the first engagement portion and / or the second engagement portion to the corresponding engaged portion.

[0011] According to the third aspect of the present invention, the first engaging portion and / or the second engaging portion, which are provided with a locking mechanism, can be more accurately fixed to the corresponding engaged portion.

[0012] A fourth invention of the present invention is a transporting cart according to the third invention, wherein the engaged part to which the locking mechanism is locked forms a three-sided frame shape when viewed in the direction of travel along the vehicle's travel direction, and the locking mechanism is locked to the upper part of the frame, and the transporting cart further has a lock guide that guides the locking mechanism to a position where it faces the upper part of the frame in the vehicle's travel direction by abutting the frame side part of the engaged part to which the locking mechanism is locked from the outside in the vehicle width direction.

[0013] According to the fourth aspect of the present invention, the locking mechanism can be locked in a state more appropriately aligned with the upper frame portion of the engaged portion that forms a three-sided frame shape.

[0014] A fifth invention of the present invention is a transporting cart according to the third invention, wherein the first engagement portion and the second engagement portion are each provided in a pair in the vehicle width direction, the pair of first engagement portions are positioned shifted in the vehicle travel direction relative to the pair of second engagement portions, and the spacing between the pair of first engagement portions is narrower than the spacing between the pair of second engagement portions.

[0015] According to the fifth aspect of the present invention, the first and second engaging parts are provided in pairs in the vehicle width direction at positions offset from each other in the vehicle travel direction, so that the transporting platform can be more accurately fixed at a predetermined position on the travel surface. Also, since the distance between the pair of first engaging parts provided at the front side in the vehicle travel direction is narrower than the distance between the pair of second engaging parts, it is easier to visually engage these with the corresponding engaged parts than if this were not the case.

[0016] A sixth aspect of the present invention is a transporting cart according to the fifth aspect of the present invention, wherein the running parts are running wheels having a pair of rear wheels arranged in the vehicle width direction and a pair of front wheels arranged in the vehicle width direction at a position shifted in the direction of travel of the vehicle from the pair of rear wheels, and the pair of first engagement parts are positioned shifted inward in the direction of travel of the vehicle and in the vehicle width direction from the pair of front wheels, and the pair of second engagement parts are positioned shifted in the direction of rearward travel of the vehicle and outward in the vehicle width direction from the pair of rear wheels.

[0017] According to the sixth aspect of the present invention, by using the running wheels for the running part, even if the transported object is heavy, it can run smoothly along the running surface. Also, the pair of first and second engagement parts can be appropriately engaged with the corresponding engaged parts without the pair of front and rear wheels hitting the engaged parts.

[0018] A seventh aspect of the present invention is the transporting carriage according to the sixth aspect, wherein the pair of first engagement portions does not include the locking mechanism, and the pair of second engagement portions includes the locking mechanism.

[0019] According to the seventh aspect of the present invention, a user standing in the backward direction of the transporting vehicle can easily perform the operation of switching between locking and unlocking each locking mechanism.

[0020] The eighth invention of the present invention is a transporting cart according to the first or second invention, further comprising an engagement guide that protrudes from the bottom of the cart body and, by abutting the engaged portion in the vehicle width direction, guides the engaged portion so as not to slip out of the cart body in the vehicle width direction from directly below the cart body.

[0021] According to the eighth aspect of the present invention, the engaged portion engaged by the first engaging portion and / or the second engaging portion can be guided so as not to come off in the vehicle width direction from directly below the carriage body due to the movement in the travel direction of the carriage, thereby making it possible to more easily fix the carriage to a predetermined position on the travel surface.

[0022] A ninth invention of the present invention is a transporting cart according to the eighth invention, wherein the first engagement portion and the second engagement portion are each provided in a pair in the vehicle width direction, the running portion is a running wheel having rear wheels provided in a pair in the vehicle width direction and front wheels provided in a pair in the vehicle width direction at a position shifted in the vehicle travel direction from the pair of rear wheels, the pair of first engagement portions are positioned shifted in the vehicle travel direction and inward in the vehicle width direction from the pair of front wheels, and the pair of second engagement portions are positioned shifted in the vehicle rearward travel direction and outward in the vehicle width direction from the pair of rear wheels, and the engagement guide guides the engaged portions with which the pair of second engagement portions engage from the outside in the vehicle width direction to prevent them from moving out of the vehicle width direction from directly below the cart body.

[0023] According to the ninth aspect of the present invention, the pair of first and second engaging parts can be engaged with the corresponding engaged parts while guiding the engaged parts that engage with the pair of second engaging parts that are passed through between the engagement guides in advance as the vehicle moves in the travel direction. This makes it possible to more easily fix the transport vehicle at a predetermined position on the travel surface.

[0024] A tenth aspect of the present invention is a transporting cart according to the first or second aspect of the present invention, wherein the running portion is a running wheel having a pair of rear wheels arranged in the vehicle width direction, and a pair of front wheels arranged in the vehicle width direction at a position shifted in the direction of vehicle travel from the pair of rear wheels.

[0025] According to the tenth aspect of the present invention, by using the running wheels for the running section, even if the transported object is heavy, it can run smoothly along the running surface. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a perspective view illustrating a schematic configuration of a transport platform vehicle according to a first embodiment. [Diagram 2] FIG. 13 is a perspective view showing a state in which the transport vehicle is fixed to an anchor on a travel surface. [Diagram 3] FIG. 2 is a perspective view of the transport platform car from the bottom side. [Figure 4] FIG. [Diagram 5] FIG. 13 is a perspective view showing an engaged state with the anchor. [Figure 6] FIG. 4 is a perspective view illustrating a state before the locking mechanism is locked. [Figure 7] FIG. 4 is a perspective view illustrating a locked state of the lock mechanism. [Figure 8] FIG. 13 is a perspective view showing a state in which the lock mechanism has been released. [Figure 9] 11 is a plan view showing a state in which the engagement guide guides the movement of the transporting platform car. FIG. [Figure 10] 13 is a plan view illustrating a state in which the lock guide guides the position of the lock mechanism. FIG. [Figure 11] FIG. 11 is a perspective view illustrating a schematic configuration of a transport platform vehicle according to a second embodiment. [Figure 12] 11 is a plan view showing a state in which the transporting platform car has been retreated from the locked position to an intermediate position. FIG. [Figure 13] 13 is a plan view showing a state in which the anchor on the front side is released sideways through the side release hole by lateral movement of the transport platform. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0028] First Embodiment (Schematic configuration of transport cart 1) First, the configuration of a transport vehicle 1 according to a first embodiment of the present invention will be described with reference to Figures 1 to 10. In the following description, when directions such as front, back, up, down, left and right are indicated, they refer to the respective directions shown in each figure.

[0029] The directions shown in each figure are those seen by a user using the transport vehicle 1. In each figure, the "forward direction" refers to the traveling direction of the transport vehicle 1 (the traveling direction of the vehicle itself). In the following description, when no specific reference figure is shown or when no reference figure has a corresponding symbol, any of Figures 1 to 10 will be appropriately referenced.

[0030] As shown in FIG. 1, the transport vehicle 1 according to this embodiment is configured as a hand-pushed vehicle device capable of traveling with an object W placed on it. The object W is, for example, a storage rack that is vehicle equipment. The running surface F on which the transport vehicle 1 travels is, for example, the ground or the floor surface of a vehicle. Note that, when the transport vehicle 1 is mounted on a transport device (not shown) that carries the transport vehicle 1, travels on the floor surface of a vehicle, and is placed on a tiered platform, the running surface F may be the mounting surface of the transport vehicle.

[0031] The transport vehicle 1 is equipped with an interlock-type stopper structure that enables it to be fixed at a predetermined position on the travel surface F. Specifically, the transport vehicle 1 is configured to be fixed on the travel surface F by engaging with four anchors A provided at predetermined positions on the travel surface F. Here, each anchor A corresponds to an "engaged portion" of the present invention.

[0032] Two anchors A are attached to each of a pair of front and rear fixed rails R that extend parallel to the vehicle width direction (left and right direction) and are embedded in the running surface F. Each fixed rail R is provided so that its upper surface is exposed and flush with the running surface F.

[0033] Each fixed rail R is made of an airline rail (registered trademark). The mounting structure of each anchor A to each fixed rail R is made of a stud fitting that allows the mounting position to each fixed rail R to be adjusted at a predetermined interval in the rail length direction (left and right direction).

[0034] The specific configurations of these anchors A and fixed rails R are described in Japanese Patent Application No. 2022-158076. The mounting positions of each anchor A on each fixed rail R correspond to the respective arrangement positions of four mating claws A1, B1 provided on the transport cart 1 described below. Each anchor A has a three-sided frame shape (inverted U-shape) when viewed in the traveling direction along the traveling direction of the transport cart 1.

[0035] The transport cart 1 has a loading platform 2, which is a rectangular plate in plan view, on which an object W to be transported can be placed, and a running part 3 consisting of four running wheels (front wheels 3A and rear wheels 3B) provided on the bottom of the loading platform 2. Here, the loading platform 2 corresponds to the "cart body" of the present invention. The running part 3 consists of a pair of front wheels 3A on the front side and a pair of rear wheels 3B on the rear side. These front wheels 3A and rear wheels 3B each consist of a swivel caster. The front wheels 3A or rear wheels 3B may also consist of fixed casters.

[0036] The transport platform 1 further has an engagement section 4 consisting of four engaging parts (first engagement sections 4A and second engagement sections 4B) provided on the bottom of the platform 2. The engagement section 4 consists of a pair of first engagement sections 4A on the front side and a pair of second engagement sections 4B on the rear side.

[0037] The first engagement portion 4A and the second engagement portion 4B each have engaging claws A1, B1 that engage with the frames of the corresponding anchors A provided on the running surface F by moving the transporting cart 1 in the traveling direction (see FIG. 2). The engagement of the engaging claws A1, B1 restricts the movement of the transporting cart 1 in the traveling direction and in the vehicle width direction (left and right direction) relative to the running surface F.

[0038] Specifically, the front pair of first engagement portions 4A have their mating claws A1 fitted into a corresponding pair of anchors A provided on the front fixed rail R. The rear pair of second engagement portions 4B have their mating claws B1 fitted into a corresponding pair of anchors A provided on the rear fixed rail R. The rear pair of second engagement portions 4B further have a locking mechanism 5 that is releasably locked to each of the corresponding anchors A.

[0039] As the transporting carriage 1 moves in the forward direction, the engaging claws B1 of the second engagement parts 4B engage with the corresponding anchors A, and the locking mechanisms 5 are locked so as to be hooked onto the frame upper parts A2 of the corresponding anchors A. This restricts the transporting carriage 1 from moving in the backward direction (the vehicle's backward direction) relative to the running surface F.

[0040] As shown in Fig. 3 and Fig. 4, the mating claws A1 of the front pair of first engagement parts 4A and the mating claws B1 of the rear pair of second engagement parts 4B are arranged at positions shifted from each other in the vehicle width direction. As a result, as shown in Fig. 5, the mating claws A1 of each first engagement part 4A and the mating claws B1 of the second engagement part 4B can be accurately mated with the corresponding anchors A on the travel surface F by a simple operation of simply moving the transporting cart 1 straight in its traveling direction. That is, the mating claws A1 of each first engagement part 4A and the mating claws B1 of the second engagement part 4B can be accurately mated only with the corresponding anchors A without hitting the anchors A that do not correspond to each other.

[0041] 4, the front pair of first engagement portions 4A and the rear pair of second engagement portions 4B are disposed at symmetrical positions on the bottom of the loading platform 2. The front pair of first engagement portions 4A are disposed at approximately the front end position on the bottom of the loading platform 2. The rear pair of second engagement portions 4B are disposed at approximately the rear end position on the bottom of the loading platform 2.

[0042] The arrangement interval W1 (distance between centers) of the fitting claws A1 of the pair of front first engagement parts 4A is narrower than the arrangement interval W2 (distance between centers) of the fitting claws B1 of the pair of rear second engagement parts 4B. Specifically, the fitting claws B1 of the pair of rear second engagement parts 4B are each arranged at approximately the outer end position in the vehicle width direction at the bottom of the loading platform 2.

[0043] More specifically, the mating claws B1 of the pair of rear second engagement portions 4B are arranged to be aligned at intervals T on the inside in the vehicle width direction of each lock guide 7 provided at the outer end position in the vehicle width direction of the bottom of the cargo bed 2. The intervals T in the vehicle width direction between these mating claws B1 and the lock guides 7 are set to approximately the same size, but slightly wider than the thickness of the outer frame side of each corresponding anchor A (see FIG. 1) with which each mating claw B1 fits.

[0044] 10, the outer frame side of each corresponding anchor A is guided by each lock guide 7 to be guided between the engaging claw B1 of each second engagement portion 4B as the transport cart 1 moves in the traveling direction. This guide allows the engaging claw B1 of each second engagement portion 4B to be properly engaged within the frame of the corresponding anchor A. This will be described in detail later.

[0045] 4, the mating claws A1 of the front pair of first engagement portions 4A are disposed inward in the vehicle width direction from the mating claws B1 of the rear pair of second engagement portions 4B. In more detail, the mating claws A1 of the front pair of first engagement portions 4A are disposed so as not to overlap with the mating claws B1 of the rear pair of second engagement portions 4B in the vehicle width direction.

[0046] The pair of front wheels 3A and the pair of rear wheels 3B constituting the running section 3 are disposed at symmetrical positions on the left and right sides of the bottom of the loading platform 2. The pair of front wheels 3A and the pair of rear wheels 3B on the rear side have the same arrangement interval W3 (the distance between the centers) between the left and right wheels.

[0047] As a result, the front pair of front wheels 3A and the rear pair of rear wheels 3B are arranged so that the right wheels of each pair overlap in the vehicle width direction, and the left wheels of each pair overlap in the vehicle width direction. The arrangement interval W3 of the front pair of front wheels 3A and the rear pair of rear wheels 3B in the vehicle width direction is wider than the arrangement interval W1 of the fitting claws A1 of the front pair of first engagement portions 4A, and narrower than the arrangement interval W2 of the fitting claws B1 of the rear pair of second engagement portions 4B.

[0048] Specifically, the front pair of front wheels 3A and the rear pair of rear wheels 3B are arranged so as to partially overlap with the fitting claws A1 of the front pair of first engagement parts 4A in the vehicle width direction. Also, the front pair of front wheels 3A and the rear pair of rear wheels 3B are arranged so as not to overlap with the fitting claws B1 of the rear pair of second engagement parts 4B in the vehicle width direction.

[0049] The front wheels 3A are disposed rearward of the mating claws A1 of the front pair of first engagement portions 4A, and the rear wheels 3B are disposed forward of the mating claws B1 of the rear pair of second engagement portions 4B.

[0050] As shown in Fig. 6, each lock mechanism 5 has a lock arm 5B rotatably connected to the fitting claw B1 of the corresponding second engagement portion 4B via a support shaft 5A extending in the vehicle width direction, and a position adjustment bolt 5C attached to the lock arm 5B. As the corresponding fitting claw B1 moves to fit into the frame of each anchor A, the claw portion B2 at the tip of each lock arm 5B hits the frame upper portion A2 of each anchor A and is pushed upward and rotated, and then the lock arm 5B is hooked from above on the frame upper portion A2 of each anchor A by the biasing force of a spring (not shown) (see Fig. 7).

[0051] As a result, as shown in Fig. 7, each lock arm 5B sandwiches each anchor A between the claw portion B2 at the tip of the lock arm 5B and each fitting claw B1, and is fixed in position to each anchor A. Each lock arm 5B has a double arm structure. Each position adjustment bolt 5C is passed through each lock arm 5B having the double arm structure so as to be screwed into it from the rear side.

[0052] The position adjustment bolts 5C are operated by turning the heads at their rear ends to shift the positional relationship between the double arm structures of the lock arms 5B in the front-rear direction. This adjusts the distance between the claw portion B2 at the tip of each lock arm 5B and the frame upper portion A2 of each anchor A. This adjustment adjusts the gap that sandwiches the frame upper portion A2 of each anchor A in the front-rear direction between the claw portion B2 of each lock arm 5B and the mating claw B1. As a result, each lock mechanism 5 can be locked with respect to the corresponding anchor A in a state where rattling is suppressed.

[0053] 8, each lock mechanism 5 is released from the locked state with respect to each anchor A by a user grasping each lock arm 5B and pushing it in the opposite direction to the biasing direction of a spring (not shown). The fitting structure of each fitting claw B1 (A1) with respect to the anchor A and the specific configuration of each lock mechanism 5 are described in Japanese Patent Application No. 2023-055419.

[0054] As shown in Figures 4 and 5, long plate-shaped engagement guides 6 are formed on the bottom of the loading platform 2, projecting downward from the left and right side edges. Each engagement guide 6 is formed over the entire area in the front-rear direction along each side edge of the bottom of the loading platform 2. Each engagement guide 6 is folded back from its downward projecting end so as to project further inward in the vehicle width direction like an eave.

[0055] Each engagement guide 6 is shaped to protrude at a low position so that its eaves-like folded back portion overlaps with each anchor A (see FIG. 1) provided on the travel surface F in the height direction. As a result, as shown in FIG. 9, each engagement guide 6 is configured so that its eaves-like folded back portions face each other from the outside in the vehicle width direction at both the left and right outer positions of these anchors A by the two rear (front) anchors A slipping directly under the loading platform 2 as the transport cart 1 moves in the traveling direction.

[0056] As a result, even if the transporting cart 1 bends in the vehicle width direction when it moves in the forward direction, each engagement guide 6 can abut against each anchor A in the vehicle width direction to guide each anchor A so that it does not come off in the vehicle width direction from directly below the platform 2. Therefore, as the transporting cart 1 moves in the forward direction, the two rear anchors A that are passed first between the engagement guides 6 can be guided while the engaging claws A1 of each first engagement portion 4A and the engaging claws B1 of the second engagement portion 4B are engaged with the corresponding anchors A.

[0057] As shown in Figs. 4 and 5, a lock guide 7 extending in the form of a long plate in the front-rear direction is joined to each engagement guide 6 in an overlapping manner in the rear region of the bottom surface folded back like a eaves. Each lock guide 7 is shaped to protrude inward in the vehicle width direction beyond each engagement guide 6. Each lock guide 7 has an inner surface in the vehicle width direction that extends parallel to the traveling direction of the transport cart 1. A sloped surface 7A is formed in the front region of the inner surface of each lock guide 7, which slopes so that the protrusion from each engagement guide 6 gradually decreases toward the front.

[0058] The inclined surface 7A of each lock guide 7 is formed in a position forward of the fitting claw B1 of each second engagement portion 4B. Also, the inner surface of each lock guide 7 is formed to be aligned with the fitting claw B1 of each second engagement portion 4B at a distance T from the outer side in the vehicle width direction.

[0059] 10, as the transport cart 1 moves in the traveling direction, the two rear (front) anchors A approach the fitting claws B1 of the second engagement parts 4B from the front, so that each lock guide 7 is disposed outside the frame side parts outside these anchors A. As a result, each anchor A is passed between the inner surfaces of each lock guide 7 in a sandwiched manner.

[0060] At that time, even if each anchor A approaches the engaging claw B1 of each second engagement portion 4B by shifting in the vehicle width direction from the position directly facing the engaging claw B1 of each second engagement portion 4B as the transport cart 1 moves in the traveling direction, each anchor A can be easily passed between the inner surfaces of each lock guide 7 by being guided along the inclined surface 7A of each lock guide 7. As a result, each anchor A is guided to a position directly facing the engaging claw B1 of each second engagement portion 4B and is properly engaged with each engaging claw B1.

[0061] At the same time, the two anchors A on the front side (rear side) are also guided by this guide to a position directly facing the fitting claws A1 of each first engagement portion 4A, and are properly fitted with each fitting claw A1. Therefore, each locking mechanism 5 can be aligned to a position directly facing the frame upper part A2 of each of the two corresponding anchors A on the rear side (near side), and properly locked to them.

[0062] To sum up, the transport vehicle 1 according to this embodiment has the following configuration: In the following, the reference characters in parentheses correspond to the respective components shown in the above embodiment.

[0063] That is, the transport cart (1) is a cart that can travel with a transported object (W) placed on it. The transport cart (1) has a running part (3) that runs along a running surface (F), and an engaging part (4) that engages with an engaged part (A) protruding from the running surface (F) by moving in the traveling direction of the vehicle. The engaging part (4) has a first engaging part (4A) and a second engaging part (4B) that are arranged at the bottom of the cart body (2) and shifted from each other in the vehicle width direction perpendicular to the traveling direction of the vehicle, and are individually engaged with the corresponding engaged part (A).

[0064] According to the above configuration, the first engaging portion (4A) and the second engaging portion (4B) can be engaged with the corresponding engaged portion (A) by moving in the traveling direction of the vehicle without hitting the non-corresponding engaged portion (A). Therefore, the transport vehicle (1) can be fixed to a predetermined position on the traveling surface (F) simply and accurately.

[0065] In addition, the running part (3) is disposed offset in the traveling direction of the host vehicle from the first engagement part (4A) and / or the second engagement part (4B), and is disposed offset in the vehicle width direction from the first engagement part (4A) and / or the second engagement part (4B) disposed offset in the retreating direction of the host vehicle. According to the above configuration, the first engagement part (4A) and / or the second engagement part (4B) disposed offset in the retreating direction of the host vehicle of the running part (3) can be appropriately engaged with the corresponding engaged part (A) by the movement in the traveling direction of the host vehicle, without the running part (3) hitting the engaged part (A).

[0066] In addition, the first engaging portion (4A) and / or the second engaging portion (4B) has a locking mechanism (5) that releasably locks the first engaging portion (4A) and / or the second engaging portion (4B) to the corresponding engaged portion (A). According to the above configuration, the first engaging portion (4A) and / or the second engaging portion (4B) having the locking mechanism (5) can be more accurately fixed to the corresponding engaged portion (A).

[0067] In addition, the engaged part (A) to which the locking mechanism (5) is locked forms a three-sided frame shape when viewed in the travel direction along the travel direction of the vehicle, and the locking mechanism (5) is locked to the frame upper part (A2). The transport cart (1) has a lock guide (7) that guides the locking mechanism (5) to a position where the frame upper part (A2) faces the travel direction of the vehicle by abutting in the vehicle width direction against the frame side part of the engaged part (A) to which the locking mechanism (5) is locked. With the above configuration, the locking mechanism (5) can be locked in a state more appropriately aligned with the frame upper part (A2) of the engaged part (A) that forms a three-sided frame shape.

[0068] Further, the first engagement portion (4A) and the second engagement portion (4B) are provided in pairs in the vehicle width direction. The pair of first engagement portions (4A) are arranged shifted in the vehicle travel direction from the pair of second engagement portions (4B), and the arrangement interval (W1) of the pair of first engagement portions (4A) is narrower than the arrangement interval (W2) of the pair of second engagement portions (4B).

[0069] According to the above configuration, the first engaging portion (4A) and the second engaging portion (4B) are provided in pairs in the vehicle width direction at positions offset from each other in the vehicle travel direction, so that the transporting platform (1) can be fixed more accurately at a predetermined position on the travel surface (F). Also, since the distance between the pair of first engaging portions (4A) provided at the front side in the vehicle travel direction is narrower than the distance between the pair of second engaging portions (4B), it is easier to visually engage these with the corresponding engaged portions (A) than if this were not the case.

[0070] The traveling portion (3) is a traveling wheel having a pair of rear wheels (3B) provided in the vehicle width direction, and a pair of front wheels (3A) provided in the vehicle width direction at a position shifted in the vehicle travel direction from the pair of rear wheels (3B). The pair of first engagement portions (4A) are disposed shifted inward in the vehicle travel direction and in the vehicle width direction from the pair of front wheels (3A). The pair of second engagement portions (4B) are disposed shifted in the vehicle backward travel direction and outward in the vehicle width direction from the pair of rear wheels (3B).

[0071] According to the above configuration, by using the running wheels for the running part (3), even if the transported object (W) is heavy, it can travel smoothly along the running surface (F). Also, the pair of the first engaging part (4A) and the second engaging part (4B) can be appropriately engaged with the corresponding engaged part (A) without the pair of the front wheels (3A) and the rear wheels (3B) hitting the engaged part (A).

[0072] In the above-described configuration, the pair of first engagement portions (4A) does not include a locking mechanism, and the pair of second engagement portions (4B) includes a locking mechanism (5). According to the above-described configuration, a user standing in the backward direction of the transport vehicle (1) can easily perform a switching operation of each locking mechanism (5) between locked and unlocked states.

[0073] The transporting cart (1) further includes an engagement guide (6) that protrudes from the bottom of the cart body (2) and guides the engaged part (A) in the vehicle width direction by abutting against the engaged part (A) in the vehicle width direction so as not to move out of the vehicle width direction from directly below the cart body (2). According to the above configuration, the engaged part (A) that engages with the first engagement part (4A) and / or the second engagement part (4B) can be guided so as not to move out of the vehicle width direction from directly below the cart body (2) by the movement in the vehicle travel direction. This makes it possible to more easily fix the transporting cart (1) at a predetermined position on the running surface (F).

[0074] Further, a pair of first engagement portions (4A) and second engagement portions (4B) are provided in the vehicle width direction. The pair of first engagement portions (4A) are disposed shifted inward in the vehicle travel direction and in the vehicle width direction from the pair of front wheels (3A). The pair of second engagement portions (4B) are disposed shifted outward in the vehicle rearward travel direction and in the vehicle width direction from the pair of rear wheels (3B). The engagement guide (6) abuts against the engaged portion (A) with which the pair of second engagement portions (4B) engage from the outside in the vehicle width direction, thereby guiding the engaged portion (A) with which the pair of second engagement portions (4B) engage so as not to come off from directly below the bogie body (2) in the vehicle width direction.

[0075] According to the above configuration, the pair of first engaging portions (4A) and second engaging portions (4B) can be engaged with the corresponding engaged portions (A) while guiding the engaged portions (A) that engage with the pair of second engaging portions (4B) that are passed through the engagement guides (6) in advance as the vehicle moves in the traveling direction. This makes it possible to more easily fix the transport vehicle (1) at a predetermined position on the running surface (F).

[0076] Second Embodiment Next, the configuration of a transport vehicle 1 according to a second embodiment of the present invention will be described with reference to Figs. 11 to 13. As shown in Fig. 11, in this embodiment, a downward-opening relief hole 8 is formed in the middle of each engagement guide 6 in the front-rear direction so as to penetrate the vehicle width direction. Also, a manual slide cover 9 is attached to the outer side of each engagement guide 6, which can be switched so as to cover or open each relief hole 8 from the outside by sliding in the front-rear direction.

[0077] 12, each escape hole 8 is arranged so as to be aligned in a straight line in the vehicle width direction with the two rear (front) anchors A by moving the transport cart 1 backward from the locked position with respect to each anchor A. Each escape hole 8 is formed in a shape that allows each anchor A to pass sideways by opening the slide cover 9 from a state where the escape hole 8 is aligned sideways with the two rear anchors A and moving the transport cart 1 sideways (to the left or right) (see FIG. 13).

[0078] As shown in Fig. 12, by moving the transport vehicle 1 back to a position where each of the relief holes 8 is aligned in a straight line with the two anchors A on the rear side in the vehicle width direction, the transport vehicle 1 does not overlap with the two anchors A on the front-rear direction. Therefore, by moving the transport vehicle 1 laterally from this state, the transport vehicle 1 can be moved to a position where it is removed from each anchor A in the vehicle width direction. Therefore, when it is necessary to move the transport vehicle 1 laterally, it can be easily moved laterally with a small amount of movement without moving the transport vehicle 1 back behind the two anchors A on the rear side (near side) and then moving it laterally.

[0079] Each escape hole 8 can be covered with a good appearance so as not to be exposed to the outside by closing the slide cover 9 except when the transporting cart 1 is moved laterally. The configuration other than the above is the same as that of the transporting cart 1 shown in the first embodiment. Therefore, the same reference numerals are used for the relevant configuration and the description will be omitted.

[0080] Other embodiments Although the present invention has been described above using two embodiments, the present invention can be embodied in various forms other than the above-mentioned embodiments.

[0081] 1. The transported object transported by the transport vehicle of the present invention can be a storage rack, as well as various vehicle equipment that is installed according to the vehicle specifications. In addition to vehicle equipment, the transported object can also be items other than vehicle equipment, such as furnishings, furniture, and fixtures.

[0082] 2. The running part may be composed of running wheels, or may be composed of sliders or rails that slide on the running surface. Furthermore, when the running part is composed of running wheels, the number of front wheels and rear wheels is not particularly limited. In other words, the running part may be composed of three or more front wheels and three or more rear wheels, or may be composed of a different number of wheels. Furthermore, the running wheels may be configured such that a middle wheel is provided between the front wheels and the rear wheels. The number of middle wheels is not limited to a specific number, as is the case with the front and rear wheels.

[0083] 3. The engagement structure between the engaging portion and the engaged portion is not limited to a specific structure, as long as the engaging portion is engaged with the engaged portion by the movement of the engaging portion relative to the engaged portion in the traveling direction of the vehicle. For example, the engaging portion provided on the transport vehicle may be a frame-shaped member such as the anchor shown in the above embodiment, and the engaged portion provided on the traveling surface may be a member that fits into the frame of the engaging portion such as the engagement claw shown in the above embodiment.

[0084] Also, at least one of the engaging portion and the engaged portion may be provided with an elastic structure such as rubber or a snap fit, so that they can be elastically fitted together. Also, the engaging portion and the engaged portion may be configured to fix the transport cart to a predetermined position on the travel surface only by the sliding friction resistance force caused by their mutual engagement. The locking mechanism may be provided in the engaged portion as well as the engaging portion. The locking mechanism may be provided in the first engaging portion as well as the second engaging portion.

[0085] The number of the first engaging portion and the second engaging portion is not particularly limited. That is, the number of the first engaging portion and the second engaging portion may be one each, or three or more each. The number of the first engaging portion and the second engaging portion may be different from each other. In addition, when at least one of the first engaging portion and the second engaging portion is provided in multiple numbers, the first engaging portion and the second engaging portion may be arranged alternately in the vehicle width direction.

[0086] Either the first engagement portion or the second engagement portion may be disposed on the inside or outside in the vehicle width direction. Also, either the first engagement portion or the second engagement portion may be disposed on the front or rear side in the vehicle travel direction. The first engagement portion and the second engagement portion may be disposed side by side in the vehicle width direction, shifted from each other so that their positions in the vehicle travel direction overlap.

[0087] When the first engagement portion and the second engagement portion are each provided in a pair in the vehicle width direction and the pair of first engagement portions are positioned shifted in the vehicle travel direction more than the pair of second engagement portions, the arrangement spacing of the pair of first engagement portions may be wider than the arrangement spacing of the pair of second engagement portions.

[0088] The first engagement portion and the second engagement portion may both be arranged in front of or behind the running portion. Also, the first engagement portion and the second engagement portion may both be arranged behind the front wheels constituting the running portion and in front of the rear wheels. Also, the first engagement portion and the second engagement portion may both be arranged to the right of the left wheel and to the left of the right wheel constituting the running portion.

[0089] 4. The transport cart may have a configuration in which the running parts and the engagement parts are provided on the bottom of the platform, which is the cart body, or a configuration in which the running parts and the engagement parts are provided on the support part (cart body) that supports the platform. The lock guide and the engagement guide may be provided on only one side of the cart body in the vehicle width direction. The lock guide and the engagement guide may be one that abuts against the engaged part from the outside in the vehicle width direction, or one that abuts against the engaged part from the inside in the vehicle width direction. Also, they may be able to abut both the outside and the inside in the vehicle width direction. [Explanation of symbols]

[0090] 1 Transport cart 2 Cargo platform (cart body) 3 Running part 3A front wheel 3B rear wheel 4 Engagement part 4A 1st engagement part A1 Interlocking tab 4B Second engaging part B1 Interlocking tab 5 Locking mechanism 5A spindle 5B Lock Arm B2 Claw part 5C Position adjustment bolt 6 Engagement guide 7 Lock Guide 7A Slope 8 Relief hole 9 Slide lid F Running surface R Fixed rail Anchor (engaged part) A2 frame top W Transported goods W1 placement interval W2 Placement Spacing W3 Spacing T interval

Claims

1. A transport vehicle capable of traveling with an object to be transported thereon, A running part that runs along a running surface; an engaging portion that is engaged with the engaged portion protruding from the travel surface by movement in the travel direction of the vehicle; The transporting cart has a first engaging portion and a second engaging portion that are arranged at the bottom of the cart body, shifted from each other in a vehicle width direction perpendicular to the vehicle travel direction, and are individually engaged with the corresponding engaged portion.

2. The transport vehicle according to claim 1, The running portion is positioned offset in the direction of travel of the vehicle relative to the first engagement portion and / or the second engagement portion, and is also offset in the vehicle width direction relative to the first engagement portion and / or the second engagement portion, which are positioned offset in the direction of retreat of the vehicle.

3. The transport vehicle according to claim 1 or 2, A transport cart having a locking mechanism for releasably locking the first engaging portion and / or the second engaging portion to the corresponding engaged portion.

4. The transport vehicle according to claim 3, the engaged portion to which the locking mechanism is locked forms a three-sided frame shape when viewed in the traveling direction along the traveling direction of the vehicle, and the locking mechanism is locked to an upper portion of the frame, The transporting cart further has a lock guide that guides the locking mechanism to a position directly facing the upper part of the frame in the direction of travel of the vehicle by abutting the engaged part, which is locked by the locking mechanism, in the vehicle width direction against the side part of the frame.

5. The transport vehicle according to claim 3, The first engagement portion and the second engagement portion are each provided in a pair in a vehicle width direction, A transporting platform in which a pair of the first engagement portions are positioned offset in the vehicle travel direction from a pair of the second engagement portions, and the spacing between the pair of the first engagement portions is narrower than the spacing between the pair of the second engagement portions.

6. The transport vehicle according to claim 5, the traveling portion is a traveling wheel having a pair of rear wheels provided in a vehicle width direction, and a pair of front wheels provided in the vehicle width direction at a position shifted in the vehicle traveling direction from the pair of rear wheels, The transport platform has a pair of first engagement portions positioned inwardly in the vehicle travel direction and in the vehicle width direction relative to the pair of front wheels, and a pair of second engagement portions positioned outwardly in the vehicle rearward travel direction and in the vehicle width direction relative to the pair of rear wheels.

7. The transport vehicle according to claim 6, A transporting platform in which a pair of the first engagement portions do not include the locking mechanism, and a pair of the second engagement portions include the locking mechanism.

8. The transport vehicle according to claim 1 or 2, The transport cart further has an engagement guide that protrudes from the bottom of the cart body and guides the engaged portion in the vehicle width direction by abutting against the engaged portion in the vehicle width direction so that the engaged portion does not come off from directly below the cart body in the vehicle width direction.

9. The transport vehicle according to claim 8, The first engagement portion and the second engagement portion are each provided in a pair in a vehicle width direction, the traveling portion is a traveling wheel having a pair of rear wheels provided in a vehicle width direction, and a pair of front wheels provided in the vehicle width direction at a position shifted in the vehicle traveling direction from the pair of rear wheels, the pair of first engagement portions are disposed offset inwardly in a vehicle travel direction and in a vehicle width direction from the pair of front wheels, and the pair of second engagement portions are disposed offset outwardly in a vehicle rearward direction and in a vehicle width direction from the pair of rear wheels, The engagement guide contacts the engaged portion with which the pair of second engaging portions engage from the outside in the vehicle width direction, thereby guiding the engaged portion with which the pair of second engaging portions engage so as not to move out of the vehicle width direction from directly below the cart body.

10. The transport vehicle according to claim 1 or 2, The transport platform has running wheels in which the running portion has a pair of rear wheels arranged in the vehicle width direction, and a pair of front wheels arranged in the vehicle width direction at a position shifted in the vehicle travel direction from the pair of rear wheels.

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