JP2007227760A - Transport vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an unattended transport vehicle that deals with its high speed operation, takes measures against dust invading from an opening of a moving transfer port, and is provided with a shutter capable of realizing miniaturization of its storage space, and eliminating a dead space while the transfer port is open. <P>SOLUTION: The transport vehicle (unattended carrier car 1) transfers goods 55 from a station 45. It has a goods storage chamber 3 in which a transfer port is formed that allows the goods 55 to pass by, a shutter 7 that opens and closes the transfer port by linking multiple plate materials 31 and 32 such that they can freely bend in any directions and turning the plate material 32 at the main edge side, and a guiding section 40 that guides the tip of the top-end plate material 31 of the multiple plate materials 31 and 32 such that the transfer pathway does not project toward the station 45 when the shutter 7 opens and closes. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a technology of a transport vehicle, that is, an automatic guided vehicle including a shutter composed of a plurality of plate members that are flexibly connected and a guide that regulates a movement locus of the shutter.

  2. Description of the Related Art Conventionally, in a factory configured with a clean room, an automatic guided vehicle is known as a means for transporting articles such as a liquid crystal panel transport cassette between production processes. The automatic guided vehicle normally has a fan unit disposed inside the vehicle body in order to maintain the cleanliness of the interior of the article storage chamber during conveyance, and discharges dust inside the article storage chamber to the outside of the vehicle body. With respect to the article delivery port (transfer port) that opens to the door, a measure is provided to prevent dust from entering from the outside of the vehicle body during transportation by installing an openable / closable shutter.

  Some of the shutters are of a take-up type using a thin sheet because the storage form at the time of opening the article delivery port (transfer port) can be realized relatively compactly. This is a shutter composed of a rotating shaft disposed in the vicinity of the ceiling of the vehicle body so as to be rotatable forward and backward, and a thin sheet having one end fixed to the rotating shaft, and by a rotating operation of the rotating shaft, The thin sheet is rolled up and fed out, and the shutter is opened and closed. However, as long as thin sheets are used, it is necessary to take measures to prevent sagging, and due to the structure of the drive unit, not only a complicated drive mechanism such as an increase in the number of parts, but also dust is generated between the timing belt and the pulley. There were also problems such as occurrence.

  In order to solve the above problems, a shutter disclosed in “Patent Document 1” is known. That is, the shutter is not much different from the above-mentioned shutter in using a thin sheet, but by providing a weight at the free end of the lower part of the sheet, the drive mechanism is simplified, the number of parts is reduced, and dust is reduced. The cause of the occurrence is eliminated as much as possible.

  In recent years, as price competition for products has intensified, many measures have been taken in the manufacturing industry to reduce manufacturing costs. As an example, shortening of production processes (reducing running costs) has been demanded. It was. And automatic guided vehicles are no exception, and there is a demand for shortening the operation time.

  When running an automated guided vehicle at high speed, the shutter using the thin sheet causes the thin sheet to flutter due to vibrations and head winds while the transport vehicle is running, and the space between the article delivery port (transfer port) and the shutter. As a result, there arises a problem that dust or the like enters the inside of the article storage chamber.

In addition, a slide opening / closing type shutter employing a plate-like door is also known as a shutter corresponding to the speedup of the automatic guided vehicle.
With regard to the shutter, a mechanism is usually provided in which the sliding door slides in the running direction of the automatic guided vehicle. Patent Document 2 discloses an automatic guided vehicle having such a shutter. This automatic guided vehicle is provided with article storage units at the front and rear, and the front and rear article storage units (transfer ports) are selectively opened by opening and closing the sliding door. If the article storage unit is arranged in the front and rear, the length of the machine body becomes long, which is against compactness. Therefore, it is conceivable to use one article storage unit. However, when the shutter is a sliding door type, even if there is only one article storage unit, it is necessary to secure a retracting place for the sliding door when opened in the traveling direction of the transport vehicle. Dead space is required.

JP 2001-233220 A JP 2003-341836 A

  Therefore, in the present invention, even when the automatic guided vehicle is speeded up, dust can be prevented from entering the article delivery port (transfer port) during traveling, and the storage space can be reduced and the shutter can be retracted. It is an object to provide an automated guided vehicle that does not need to secure an excessive amount of space.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the first aspect of the present invention, a plurality of plate members are flexibly connected to an article storage chamber in which a transfer port that allows passage of articles is formed and a carriage that transfers articles to and from a station. And a shutter that opens and closes the transfer port by rotating the base plate member, and a distal side of the plurality of plate members so that a movement path when the shutter is opened and closed does not protrude to the station. And a guide for guiding the tip of the plate member.

  According to a second aspect of the present invention, the shutter includes a pair of units each having two plate members connected to each other, and the base plate member of each unit is disposed at the front and rear ends of the vehicle body. The guides are arranged so that the plate member on the distal end side moves along the opening, and each unit is connected by rotating the plate member on the proximal end side from the opening center side to the end side. The distal end plate member is moved from the center of the opening to the end side along the guide, and the base end plate member is rotated so that the angle between the distal end plate member and the distal end plate member becomes an acute angle. The unit is stored in the vehicle body in a folded state.

  According to a third aspect of the present invention, the plate member on the front end side is configured in a “shape” projecting outward in a plan view.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, since the shutter is composed of a plurality of plate members that are flexibly connected, there is no fluttering caused by vibrations or head winds during traveling of the transport vehicle (automated transport vehicle), and the transfer port is completely At the same time, at least one of the plate members is driven to open and close the shutter, and at least one of the plate members obstructs the transfer port by the area when the shutter is opened and closed. By providing the guide so that there is no shutter, the retreating place of the shutter can be narrowed compared to the case of the sliding door type. In addition, the protrusion of the shutter in the transfer direction when the shutter is opened and closed can be suppressed.

  According to a second aspect of the present invention, in a shutter composed of two plate members that are flexibly connected, the opening / closing mechanism is executed by forward / reverse rotation of one flat plate member, and the other is interlocked along a guide. Since it is stored in the vehicle body in a folded state by turning, the adjacent constituent members are moved so that the front surface and the back surface do not contact each other when the shutter is stored. The dust adhering to the (outside the vehicle body) does not adhere to the back surface (inside the vehicle body) of the other plate member, and the dustproof effect can be improved.

  According to a third aspect of the present invention, the plate member on the front end side is configured to have a “U” shape that protrudes outward in a plan view, so that the plate member on the front end side is disposed in the guide. A horizontal portion is formed along the side portion of the automatic guided vehicle, and the horizontal portion moves horizontally along the guide, thereby further preventing contact with the article. In addition, the trajectory of the distal end when the shutter is opened and closed can be reduced, and when the shutter is closed, the “edge” -shaped member on the distal end side covers the flat plate member on the proximal end side. Therefore, the storage space for the shutter is further reduced.

Next, embodiments of the invention will be described.
1 is a side view showing an overall configuration of an automated guided vehicle according to an embodiment of the present invention, FIG. 2 is a front view of the automated guided vehicle shown in FIG. 1, and FIG. 3 is an exploded view of the automated guided vehicle shown in FIG. It is a top view. FIG. 4 is a front view showing the shutter according to the present invention, and FIG. 5 is a plan view showing the opening / closing operation of the shutter according to the present invention in time series.

[Overall configuration of automated guided vehicle]
First, the overall configuration of the automatic guided vehicle 1 of the present invention will be outlined with reference to FIGS. 1 to 3. (Note that the direction of the arrow shown in FIGS. 1 and 3 is the front of the carriage in the traveling direction.)
The automatic guided vehicle 1 includes a traveling carriage 2 having a driving function, a storage chamber 3 constructed from a plurality of members, and a transfer unit 8 having a conveying function.

  The automatic guided vehicle 1 is a transport vehicle that transfers an article 55 to and from a station 45 that is a transfer source or transfer destination of the article 55. The station 45 is, for example, a processing device that performs processing of the article 55. The transfer of the article 55 between the automatic guided vehicle 1 and the station 45 moves the article 55 via the roller conveyors 9 and 9 provided in the automatic guided vehicle 1 and the roller conveyor provided in the station 45. To do.

  In the traveling carriage 2, driving wheels 4 and 4 and driven wheels 5 and 5 are rotatably arranged in the front-rear direction of the main frame 12, and a bumper 10 made of a resin member is provided on the outer periphery of the main frame 12. Is provided.

Electric motors 14 and 14 as drive sources are directly connected to the drive wheels 4 and 4, respectively. Here, the connection means between the drive wheels 4 and 4 and the electric motors 14 and 14 is not limited to the direct connection method, and may be configured through a speed reduction mechanism using a timing belt and a pulley, for example. Also good.
Electric power is supplied to the electric motor 14 by a known means. In the present embodiment, the battery 15 is loaded and used as a power supply source. However, the present invention is not limited to this. For example, the traveling carriage 2 can be connected to a power supply line provided along the traveling route of the traveling carriage 2. It may be a system that performs non-contact using electromagnetic induction by a power receiving device provided in the apparatus.

  The driven wheels 5 and 5 are constituted by casters having a free rotation function, and are pivotally supported so that the direction of the wheels can be changed along the traveling direction. Thereby, the turning radius of the traveling carriage 2 can be minimized.

  The bumper 10 is supported on the outer peripheral portion of the main frame 12 via a support member 12 a and is disposed at the most protruding position on the outer side in the horizontal direction of the automatic guided vehicle 1. Therefore, when the automatic guided vehicle 1 is traveling, the bumper 10 has the role of absorbing the impact at that time when the bumper 10 collides first when there is contact with an interference.

The storage chamber 3 is disposed on the upper surface of the traveling carriage 2 and is formed in a substantially rectangular parallelepiped shape from a plurality of skeleton members (not shown). The interior of the storage chamber 3 is an article storage section 6, and an opening 6 a for delivering an article 55 is provided on both the left and right sides with respect to the carriage traveling direction. In addition, in each of the openings 6a, openable and closable shutters 7 and 7 are arranged side by side in pairs (the shutter 7 will be described later).
Below the article storage unit 6, control panels 16 and 16 for storing the control equipment and program storage device of the traveling carriage 2 are arranged facing the traveling direction of the carriage, and above the article storage unit 6. In the approximate center, filter fan units 59 and 59 are disposed.
The filter fan unit 59 is a device that blows clean air into the article storage unit 6. A discharge port (not shown) for discharging the blown air to the outside is provided below the article storage unit 6. ) Is provided. Thereby, the dust etc. which exist in the said article | item storage part 6 can be discharged | emitted outside, and a clean environment can be maintained.

The transfer section 8 includes roller conveyors 9 and 9 that carry in and out articles 55, a lifting device 17 that adjusts the height level of the roller conveyors 9 and 9, and a swing that finely adjusts the inclination of the roller conveyors 9 and 9. A moving device 200, a turning device 100 that turns the roller conveyors 9 and 9 in a horizontal plane, and a slide device 18 that slides the roller conveyors 9 and 9 in the front-rear direction and the left-right direction (transfer direction) are provided.
With respect to the positional relationship, the slide device 18 is disposed on the traveling carriage 2, the swing device 100 is disposed on the slide device 18, the lift device 17 is disposed on the swing device 100, and the swing mechanism 200 is disposed on the lift device 17. The roller conveyors 9 and 9 are arranged on the swinging mechanism 200.

  The roller conveyor 9 is a transport device in which a plurality of rollers 9a, 9a, 9a,. That is, a transfer device for the article 55 is constituted by a pair of roller conveyors 9 and 9 arranged to face each other in parallel.

  In this embodiment, a pulley 9b is provided at one end of each roller 9a, the pulley 9b, a plurality of idlers 9c, 9c, 9c,... (Not shown) are connected by a timing belt 9d or the like, and the roller conveyor 9 has a drive function. It is not necessary to be limited to this. For example, the plurality of rollers 9a, 9a, 9a,... Are simply roller rollers that do not have a drive function (both ends of the shaft are rotatably supported by bearings or the like). It is also possible to provide a moving device that grips the article 55 and moves it on the roller control roller so that the article 55 can be transferred.

  In this embodiment, two roller conveyors 9 and 9 having the same structure are arranged side by side in accordance with the width dimension of the article 55. However, the present invention is not limited to this. For example, the roller 9a It is also possible to extend one full length and arrange one wide conveyor, and conversely, three or more roller conveyors may be arranged in parallel. Furthermore, the type of conveyor is determined by the properties of the article 55, and for example, a belt conveyor type formed by connecting both ends of a resin sheet may be adopted.

  The elevating device 17 is provided with an elevating frame 17a above the base frame 17b. At both ends in the longitudinal direction of the roller conveyor 9, the base frame 17b and the elevating frame 17a are paired with a pair of link mechanisms 17c. 17c. An electric motor 19 is provided as a drive source for each link mechanism 17c, and the elevating frame 17a moves up and down with respect to the base frame 17b by forward and reverse rotation of the electric motor 19.

The swing mechanism 200 is a device that suppresses left and right tilting with respect to the transfer direction, and is disposed between the elevating frame 17a and the roller conveyors 9 and 9.
The swing mechanism 200 is provided with a pair of frames 8a and 8a that support the roller conveyors 9 and 9 at both ends in the longitudinal direction, and a shaft 17d that pivots the frames 8a and 8a at the center. Yes.
The shaft 17d is pivotally supported on the upper surface of the elevating frame 17a. At the same time, dampers 17e made of springs are provided on both sides of the shaft 17d in the longitudinal direction of the frame 8a. Even if there is an inclination between the roller conveyor provided in the station 45 and the roller conveyors 9 and 9 provided in the automatic guided vehicle 1 on the left and right with respect to the transfer direction, the roller conveyor 9 is in accordance with the magnitude of the inclination. Tilt so that 9 follows, and the article 55 moves between both roller conveyors without receiving resistance.

The turning device 100 allows the base frame 17b to turn with respect to a Y table 24 (described later) of the slide device 18. Thereby, the transfer part 8 arrange | positioned in the upper part including the raising / lowering apparatus 17 can turn, and it can adjust the direction of the roller conveyors 9 * 9.
The swivel device 100 is configured by connecting a shaft 17g, which is a vertical shaft pivotally supported by the base frame 17b, and an electric motor 20 that rotates the shaft 17g via a timing belt 17f. Note that the present invention is not limited to this configuration. For example, the shaft 17g and the electric motor 20 may be directly connected to each other through a coupling at one end. A gear meshing method using the idler gear may be used.

The slide device 18 includes an X table 22 that can move in a right angle (left and right direction) with respect to the carriage traveling direction, and a Y table 24 that is located above the X table 22 and can be moved in parallel with the carriage traveling direction (front and rear direction). The X table electric motor 25 and the Y table electric motor 26 are provided as driving sources for each table. Further, the above-described lifting device 17 is disposed on the upper surface of the Y table 24 via the turning device 100.
When the X table 22 is driven by the X table electric motor 25, the roller conveyors 9 and 9 slide in the front-rear direction. When the electric motor 26 for the Y table 24 is driven, the roller conveyors 9 and 9 slide in the left-right direction.

Since the articles 55 are stored in the storage chamber 3, when carrying in / out operations of the articles 55 with the station 45, the roller conveyors 9 and 9 provided in the automatic guided vehicle 1 are arranged on the station 45 side. It is necessary to reduce the distance between the roller conveyors 9 and 9 and the roller conveyor provided in the station 45.
Here, the left-right direction of the automatic guided vehicle 1 is the transfer direction of the article 55. Therefore, at the time of transfer, by driving the X table electric motor 25, the roller conveyors 9 and 9 provided in the automatic guided vehicle 1 are projected to the station 45 side.
In addition, by sliding the Y table 24 in the front-rear direction, the position of the roller conveyor 9 can be finely adjusted in the direction perpendicular to the traveling direction in the work of carrying in and out the article 55.

[Shutter configuration]
Next, details of the shutter 7 of the present invention will be described with reference to FIG.
The shutter 7 includes a door main body 41 that closes the opening 6a of the article delivery port (transfer port), a drive unit 39 that automatically opens and closes the shutter 7, and a guide unit 40 that regulates the locus of the shutter 7 opening and closing operation. Is done. The shutters 7 are arranged symmetrically with respect to one opening, and the pair of shutters 7 and 7 are simultaneously driven to open and close the opening 6a. The opening / closing method of the shutter 7 is a double door opening method.

  The door body 41 includes a distal end side door 31 bent in a “U” shape in plan view, and a proximal end revolving door connected to one end side of the distal end door 31 via a hinge 36 or the like. 32. Both the front door 31 and the revolving door 32 are plate-like members. A plurality of windows 42, 42, 42... Are provided on the flat portions of both members so that the state of the article storage unit 6 can be confirmed from the outside of the automatic guided vehicle 1.

In the door main body 41, the front door 31 is disposed so as to face the center of the opening 6a with respect to the opening 6a. The front side of the front door 31 (on the side of the anti-revolving door 32) has a front surface in the longitudinal direction. A cushion material 38 is provided on the surface. The cushion member 38 has a function of absorbing an impact caused by a collision with the opposing shutter 7 when the shutter 7 is closed, and improving the sealing degree of the article storage unit 6 when the shutter 7 is closed.
Further, guide rollers 34 and 34 are rotatably supported on the upper and lower surfaces of the front door 31 in the vicinity of the front end portion (on the side where the cushion material 38 is disposed), and these guide rollers 34 and 34 are respectively stored. Guided by guide rails 35 and 35 disposed on the upper frame 21 and the lower frame 23 constituting the chamber 3.

In the revolving door 32, a shaft 33 is fixed on the opposite side of the connecting portion with the tip door 31. The drive unit 39 turns the revolving door 32 by rotating the shaft 33. As will be described in detail later, the shaft 33 is configured to be rotationally driven in both forward and reverse directions.
In conjunction with the turning operation of the swivel door 32, the front door 31 is moved by the guide rails 35 and 35, and the shutter 7 is opened and closed.

The drive unit 39 includes the shaft 33, the electric motor 13 that rotates the shaft 33, and a coupling 37 that connects the electric motor 13 and the shaft 33.
In addition, about the connection means of the electric motor 14 and the shaft 33, it is not limited to the above-mentioned direct connection system, For example, you may comprise via the deceleration mechanism using a timing belt, a pulley, etc.

[Shutter opening / closing operation]
Next, details of the opening / closing operation relating to the shutter 7 will be described with reference to FIG. 5A shows the closed state of the shutter 7, FIG. 5D shows the open state of the shutter 7, and FIGS. 5B and 5C show the processes from the open state to the closed state, respectively. Indicates a time-series state.

As described above, the shutters 7 and 7 are disposed symmetrically with respect to each other at the center of the opening 6a, and the movement trajectory regarding the opening / closing operation is also symmetric. Hereinafter, the opening / closing operation will be described focusing on the right shutter 7 in FIG.
When the shutter 7 is moved from the closed state ((a) shown in FIG. 5) to the open state ((d) shown in FIG. 5), the shaft 33 is rotated counterclockwise by the electric motor 13, and the shutter 33 is associated therewith. Then, the revolving door 32 starts to turn counterclockwise around the shaft 33 as the rotation axis.

  Since the front door 31 is connected to the hinge 36 on one end side (right side in FIG. 5), as the revolving door 32 turns, it is pulled and moved to the right side. At this time, as described above, the guide roller 34 is pivotally supported at the distal end portion (center side of the opening 6a) of the distal end door 31, and the distal end portion (guide roller 34) is guided by the guide rail 35. It moves along the guide path of the rail 35.

When the shutter 7 is opened and closed, the revolving area of the revolving door 32 is an arc area with the shaft 33 as the center and the lateral width (length in the horizontal plane) of the revolving door 32 as a radius. The revolving door 32 does not move out of the arc region.
On the other hand, the front end of the front door 31 is regulated on the guide path of the guide rail 35, and the hinge 36 at the end is regulated on the arc path centering on the shaft 33. The guide rail 35 is disposed on the center side of the opening 6a with respect to the shaft 33, and the maximum projecting position to the outer side in the left-right direction (the lower side in FIG. 5) of the hinge 36 (in FIG. 5, directly below the shaft 33). It is disposed inside the automatic guided vehicle 1 (upper side in FIG. 5) than the position). For this reason, when the shutter 7 is opened and closed, the moving region of the front door 31 is inward of the maximum protruding position of the hinge 36 outward in the left-right direction in the left-right direction (up-down direction in FIG. 5), and in the front-rear direction (FIG. 5 in the left-right direction) is inside the maximum projecting position on the outer side in the front-rear direction of the hinge 36 (right side in FIG. 5). In addition, since the front door 31 has a dogleg shape, it may protrude slightly outward from the hinge 36 in the left-right direction, but is basically as described above.

For this reason, when the shutter 7 is opened and closed, the movement region of the entire shutter 7 including the front door 31 and the revolving door 32 does not extend outside the hinge 36 in the left-right direction (transfer direction), but from the hinge 36 in the front-rear direction. Not even outside.
When the shutter is a sliding door, it is necessary to secure a place for the shutter to be retracted at the time of transfer by the full width of the shutter, and when the shutter is opened, the shutter protrudes before and after the carrier body, This evacuation place had to be provided outside the transport vehicle. On the other hand, in the case of the shutter 7 having the above-described configuration, the retreat place of the shutter 7 may be ensured by the entire width of the revolving door 32.

Thereafter, the revolving door 32 is detected by a detector (not shown) installed at the end position of the revolving operation, the drive of the electric motor 13 is stopped, and the shutter 7 is opened (shown in FIG. 5). d).).
At this time, the front door 31 and the revolving door 32 are alternately bent and stored. And the back surface of the revolving door 32 and the back surface of the front door 31 are in a positional relationship facing each other. Thus, since the front door 31 and the swivel door 32 are alternately bent and stored, the front door 31 and the back surface of the swivel door 32 that come into contact with the clean air toward the storage chamber 3 during transport, and dust The front door 31 and the surface of the revolving door 32 that are in contact with outside air containing dust do not touch (or approach) when the shutter 7 is stored. In the case of a sheet-shaped and retractable shutter, there is a problem that the front surface and the back surface of the sheet are in contact at the time of winding, but the shutter 7 having the above configuration does not have such a problem.
In addition, since the front door 31 is a “U” shape that is concave on the shaft 33 side, the front door 31 embraces the revolving door 32 when the shutter 7 is stored, and the storage space for the shutter 7 is further increased. Even smaller. And the compact accommodation state of the shutter 7 is securable.

  The closing operation of the shutter 7 is the reverse of the above opening operation. That is, when the revolving door 32 swiveled clockwise pushes the front end door 31 to the left side at the connecting portion (hinge 36), the front end door 31 moves to the left side, and then a detector (not shown). Detects the front door 31 and the closing operation of the shutter 7 ends ((a) shown in FIG. 5).

  As for the above-described detectors, two detectors are installed so as to detect the open / closed state of the shutter 7, but the present invention is not limited to this. For example, in the shutter 7 open / close operation program In FIG. 5, conditions such as a timer may be set.

  In the present embodiment, the shutter is composed of two plate members. However, the shutter may be composed of three or more plate members. Further, any plate member may be used as a plate member to be driven when the shutter is opened and closed. For example, in the shutter 7, instead of driving the revolving door 32 to turn, the front door 31 may be driven back and forth by a cylinder device.

The side view which showed the whole structure of the automatic guided vehicle which concerns on one Example of this invention. The front view of the automatic guided vehicle shown in FIG. The top view of the automatic guided vehicle shown in FIG. The front view which shows the shutter which concerns on this invention. The top view which showed the opening-and-closing operation | movement of the shutter which concerns on this invention in time series.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automatic guided vehicle 7 Shutter 13 Electric motor 31 Front door 32 Revolving door 33 Shaft 34 Guide roller 35 Guide rail 36 Hinge 37 Coupling 38 Cushion material 40 Guide part 41 Door main body

Claims (3)

  In a transport vehicle that transfers articles to and from a station, an article storage chamber in which a transfer port allowing passage of articles is formed and a plurality of plate members are flexibly connected to each other, and a base plate member A shutter that opens and closes the transfer port by rotating and guides the tip of the plate member on the tip side of the plurality of plate members so that the movement path when the shutter is opened and closed does not protrude to the station And a guide.   The shutter is configured by arranging a pair of units each having two plate members connected to each other, the plate members on the base end side of each unit are arranged at front and rear end portions of the vehicle body, and the guide is arranged at the front end. The plate member on the side is arranged so as to move along the opening, and each unit rotates the base plate member from the center side of the opening toward the end side, thereby connecting the distal end side member. A state in which the unit is folded by moving the plate member along the guide from the center of the opening toward the end, and rotating the base plate so that the angle between the plate member and the plate member on the distal end is an acute angle. The transport vehicle according to claim 1, wherein the transport vehicle is stored in a vehicle body. The transport vehicle according to claim 2, wherein the plate member on the front end side is formed in a “shape” protruding outward in a plan view.

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