JP2013086943A - Carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain an increase in the length in the traveling direction of a carrier, even if a cable chain is arranged in the carrier.SOLUTION: This carrier travels in the lateral Y direction. The carrier 3 includes a vehicle body, a transfer device, the cable chain 31, a first cable chain support part 33 and a second cable chain support part 35. The vehicle body can travel in the lateral Y direction. The transfer device is arranged in the vehicle body, and moves in the lateral Y direction. The cable chain 31 is fixed at one end 31b to the vehicle body, and is fixed at the other end 31c to the transfer device. The first cable chain support part 33 continues from a fixed part of the vehicle body side cable chain 31, and inclines downward toward the outside from a moving range of the transfer device. The second cable chain support part 35 is separately arranged by a distance or more corresponding to movable curvature of the cable chain 31 from the first cable chain support part 33, and inclines downward toward the outside from the moving range of the transfer device.

Description

  The present invention relates to a transport vehicle, and more particularly, to a transport vehicle that transfers articles to and from a transfer location.

A transfer vehicle for transferring an article may be provided with a transfer device for transferring the article to and from the transfer location. When the transfer device moves on the vehicle body of the transport vehicle, a cable chain that protects electrical wiring is used between the transfer device and the vehicle body.
For example, in a transfer device that transfers an article using a pair of arms that open and close, the arm moves in the same direction as the traveling direction of the transport vehicle (see, for example, Patent Document 1).
Conventionally, cable chains are usually arranged horizontally. The cable chain has one end fixed to the transfer device and the other end fixed to the vehicle body.

JP 2010-163215 A

  When the cable chain is horizontally disposed, when one end of the cable chain fixed to the transfer device approaches the other end, the curved portion of the cable chain is disposed farthest from the fixed portion. When the transfer device moves in the same direction as the traveling direction of the transport vehicle, the cable chain is arranged along the traveling direction. For this reason, if a cable chain is arrange | positioned in a vehicle body, the length of the traveling direction of a conveyance vehicle will become long.

  An object of the present invention is to suppress an increase in the length of the transport vehicle in the travel direction even if a cable chain is arranged in the transport vehicle in which the transfer device moves in the travel direction.

  Hereinafter, a plurality of modes will be described as means for solving the problems. These aspects can be arbitrarily combined as necessary.

  The transport vehicle according to the present invention travels in the first direction and transfers articles to and from the transfer location. The transport vehicle includes a vehicle body, a transfer device, a cable chain, a first cable chain support portion, and a second cable chain support portion. The vehicle body can travel in the first direction. The transfer device is provided on the vehicle body and moves in the first direction. The cable chain has one end fixed to the vehicle body and the other end fixed to the transfer device. The first cable chain support portion is continuous from the fixed portion of the cable chain on the vehicle body side, and is inclined downward toward the outside from the moving range of the transfer device. The second cable chain support portion is disposed at a distance or more from the first cable chain support portion according to the movable curvature of the cable chain, and is inclined downward toward the outside of the moving range of the transfer device.

  In this transport vehicle, the vehicle body can travel in the first direction, and the transfer device provided on the vehicle body also moves in the first direction with respect to the vehicle body. When the transfer device moves relative to the transport vehicle in a direction in which one end and the other end of the cable chain approach each other, the curved portion is disposed away from the fixed portion. At this time, one end side fixed to the vehicle body of the cable chain up to the curved portion is supported by the first cable chain support portion, and the other end side is supported by the second cable chain support portion. Since the first cable chain support portion and the second cable chain support portion are inclined downward from the cable chain fixing portion toward the outside of the moving range of the transfer device, the cable chain is disposed obliquely. For this reason, the length of the 1st direction which a cable chain occupies can be shortened rather than arranging a cable chain horizontally. Here, since the cable chain can be disposed obliquely so that the curved portion is disposed below the fixed portion, an increase in the length of the transport vehicle in the traveling direction can be suppressed even if the cable chain is disposed.

The carrier vehicle may further include a cable lifting prevention portion that is arranged at a distance equal to or greater than the width of the link of the second cable chain support portion and the cable chain and is inclined downward toward the outer side of the moving range of the cable chain.
Thereby, even if a cable chain is arrange | positioned diagonally, the lifting of a cable chain can be prevented.

In the transport vehicle, the upper end of the cable lifting prevention portion extends to a position substantially the same as the height position of the upper surface of the cable chain disposed in the first direction.
In this case, the cable chain can be prevented from being lifted with a minimum length.

  According to the present invention, since the cable chain can be disposed obliquely so that the curved portion is disposed below, an increase in the length of the transport vehicle in the first direction can be suppressed even if the cable chain is disposed.

1 is a schematic plan view of an automatic warehouse in which a transport vehicle according to an embodiment of the present invention is employed. It is an II-II arrow line view of FIG. 1, and is a figure for demonstrating a rack and a transfer apparatus. The schematic plan view of a transfer apparatus. The partial cross section model side view of a transfer apparatus. FIG. 5 is an enlarged partial cross-sectional schematic side view of the second cover portion side of FIG. 4.

(1) Whole automatic warehouse Hereinafter, the automatic warehouse 1 by which 1st Embodiment which concerns on this invention was employ | adopted is demonstrated. In addition, in this embodiment, the up-down direction of FIG. 1 is the front-rear X direction of the automatic warehouse 1, and the left-right direction of FIG. 1 is the left-right Y direction of the automatic warehouse 1 (an example of a first direction that is a traveling direction).

  In FIG. 1, an automatic warehouse 1 mainly includes a front rack 2a and a rear rack 2b, and a plurality of transport vehicles 3 according to an embodiment of the present invention that travel in the left and right Y directions on each floor of the front rack 2a and the rear rack 2b. It is composed of

(2) Rack The front rack 2a and the rear rack 2b are arranged on the front and rear sides so as to sandwich the travel path 5 of the transport vehicle 3 extending in the left-right Y direction. The front rack 2a and the rear rack 2b are adjacent to a plurality of first struts 7 arranged on the traveling passage 5 side to the left and right at predetermined intervals, and second struts 9 arranged on the opposite side of the traveling passage 5 with predetermined intervals. It has a large number of luggage storage shelves 11 provided between the first support column 7 and the second support column 9. As is clear from FIG. 1, the transport vehicle 3 places the luggage W (an example of an article) on the luggage storage shelf 11. The article storage shelf 11 is provided over a plurality of floors in the vertical direction.

  In the lowermost luggage storage shelf 11 on the left side of each floor of the front rack 2a, a storage station 17 for storing the luggage W is disposed. In the lowermost luggage storage shelf 11 on the left side of each floor of the rear rack 2b, a delivery station 19 for delivering the luggage W is arranged.

(3) Transport Vehicle In FIGS. 1, 2 and 3, a pair of front and rear rails 21 is provided for each floor on the first support column 7 of the front rack 2a and the rear rack 2b of each floor along the traveling path 5. The plurality of transport vehicles 3 are guided by the pair of front and rear rails 21 so as to be movable in the left and right Y directions. The plurality of transport vehicles 3 transport the load W between the large number of load storage shelves 11, the storage station 17, and the output station 19.

  As shown in FIGS. 1, 2, 3, and 4, the plurality of transport vehicles 3 include a vehicle body 22, a transfer device 29 provided on the vehicle body 22, and a cable chain 31. Further, the transport vehicle 3 includes a first cable chain support portion 33 that supports the cable chain 31, a second cable chain support portion 35, and a lifting prevention portion 37. The vehicle body 22 has a pair of driving wheels 23a and a pair of driven wheels 23b that are spaced apart in the left-right Y direction. The driving wheel 23 a and the driven wheel 23 b are rotatably supported by the vehicle body 22 by bearings and travel on the pair of rails 21. The vehicle body 22 is prevented from being derailed from the rail 21 by a guide roller (not shown). The drive wheel 23 a is driven by a traveling motor 87. The vehicle body 22 includes a frame 22a extending in the left-right Y direction, and a first cover portion 22b and a second cover portion 22c fixed to both ends of the frame 22a. The first cover portion 22b is provided at the right end of the frame 22a and accommodates the traveling motor 87, the arm opening / closing motor 90, and the arm moving motor 92 (FIG. 3). The traveling motor 87 transmits the rotation to the drive wheels 23a by, for example, a chain. The second cover portion 22c is fixed to the left end of the frame 22a and houses the cable chain 31 therein.

(4) Transfer Device The transfer device 29 is a device for transferring the cargo W between the transport vehicle 3, the warehousing station 17, the shipping station 19, and the luggage storage shelf 11. As shown in FIGS. 4 and 5, the transfer device 29 includes a first base 51a and a second base 51b, and a first arm 53a and a second arm 53b that move the article W in the front-rear X direction. And. Further, the transfer device 29 moves the second base 51b toward and away from the first base 51a in the left-right Y direction, and moves the first arm 53a and the second arm 53b in the front-rear X direction. 2 drive unit 61.

  The first arm 53a and the second arm 53b are arranged so that the centers in the front-rear X direction coincide with the centers in the front-rear X direction of the first base 51a and the second base 51b at the home position shown in FIG. Further, in the left-right Y direction, the first arm 53a and the second arm 53b are arranged farthest apart.

(4-1) First Base and Second Base The first base 51 a is fixed to the vehicle body 22. The second base 51b is supported on the vehicle body 22 by, for example, linear bearings and linear guides so as to be able to approach and leave the first base 51a in the left-right Y direction. The 1st base 51a and the 2nd base 51b are arranged at intervals in the right-and-left Y direction between the 1st cover part 22b and the 2nd cover part 22c. The first base 51a and the second base 51b support the first arm 53a and the second arm 53b movably in the front-rear X direction on the inner surfaces facing each other.

(4-2) 1st arm and 2nd arm The 1st arm 53a and the 2nd arm 53b are each provided in the 1st base 51a and the 2nd base 51b so that advance and retreat in the front-back X direction are possible.

  The first arm 53a has a first intermediate arm portion 54a and a first tip arm portion 55a. The second arm 53b has a second intermediate arm portion 54b and a second tip arm portion 55b. The first intermediate arm portion 54a and the second intermediate arm portion 54b are supported on the inner side surfaces of the first base 51a and the second base 51b so as to be movable in the front-rear X direction. The first intermediate arm portion 54a and the second intermediate arm portion 54b are substantially rectangular plate-shaped members.

  The first tip arm portion 55a and the second tip arm portion 55b are supported on the inner side surfaces of the first intermediate arm portion 54a and the second intermediate arm portion 54b so as to be movable in the front-rear X direction. The first tip arm portion 55a and the second tip arm portion 55b are substantially rectangular plate-like members. The first tip arm portion 55a and the second tip arm portion 55b are connected to the first intermediate arm portion 54a and the second intermediate arm portion 54b through an interlocking mechanism (not shown). The interlocking mechanism operates to move the first tip arm portion 55a and the second tip arm portion 55b at a double speed in conjunction with the movement of the first intermediate arm portion 54a and the second intermediate arm portion 54b.

  A pair of swinging first hook arm portions 55c are attached to both ends in the front-rear X direction of the first tip arm portion 55a. The first hook arm portion 55c is a first tip arm swingable about the front and rear X-axis between a first position shown in FIG. 4 approaching the second arm 53b and a second position separated from the second arm 53b. The both ends of the portion 55a are swingably connected. The pair of first hook arm portions 55c are driven to swing by a pair of motors (not shown). A pair of swinging second hook arm portions 55d are attached to both ends in the front-rear X direction of the second tip arm portion 55b. The second hook arm portion 55d has both ends of the second tip arm portion 55b swingable about the front and rear X-axis to a first position approaching the first arm 53a and a second position moving away from the first arm 53a. Is swingably connected to the motor. The pair of second hook arm portions 55d are driven to swing by a pair of motors (not shown).

(4-3) First Drive Unit As shown in FIG. 3, the first drive unit 60 is a mechanism for opening and closing the second base 51b so as to approach and separate from the first base 51a in the left-right Y direction. is there. By this opening / closing drive, the first tip arm portion 55a and the second tip arm portion 55b approach the both side surfaces of the load W, and the first hook arm portion 55c and the second hook arm portion 55d can pull or press the load. Move to. The first drive unit 60 includes an arm opening / closing motor 90 and a ball screw shaft 62 connected to the arm opening / closing motor 90. As shown in FIG. 4, the ball screw shaft 62 is screwed into a nut member 64 provided on the second base 51b.

  When the ball screw shaft 62 rotates in one direction by the arm opening / closing motor 90, the second base 51b moves in the opening direction away from the first base 51a, and in the other direction, moves in the closing direction approaching. .

(4-4) Second Drive Unit As shown in FIG. 3, the second drive unit 61 reciprocates the first arm 53 a and the second arm 53 b in the front-rear X direction. The 2nd drive part 61 is comprised by the combination of a motor and a spline shaft, or multiple motors.

(5) Cable Chain As shown in FIG. 5, the cable chain 31 is provided to guide the wiring for the electrical component provided on the second arm 53 b of the transfer device 29 to the vehicle body 22. The electrical components provided on the second arm 53b are, for example, a motor that drives the pair of second hook arm portions 55d, various sensors provided on the second tip arm portion 55b, and the like. The cable chain 31 is made of, for example, a synthetic resin, and is configured by connecting a plurality of links 31a having a U-shaped cross section having a space in which the electric wiring 80 can be stored. The pitch P of the links 31a is 20 mm, for example, and the width W of the links 31a is 15 mm, for example. The opening of the link 31a is covered with a flat lid (not shown) that can be opened and closed. One end 31 b of the cable chain 31 is fixed to a first cable chain support portion 33 fixed inside the second cover portion 22 c constituting the vehicle body 22. The other end 31 c of the cable chain 31 is fixed to a wiring bracket 51 c provided on the second base 51 b constituting the transfer device 29.

(6) 1st cable chain support part The 1st cable chain support part 33 is arrange | positioned inside the 2nd cover part 22c. The first cable chain support portion 33 is fixed to a first support bracket 40 that is fixed inside the second cover portion 22c. The first support bracket 40 has a first fixing part 40a fixed to the inner surface of the second cover part 22c by bolts and nuts, and a first support fixed to the first fixing part 40a by appropriate fixing means such as welding. Part 40b. The first support part 40b is a member made of a steel plate and extends obliquely upward at an angle of 60 degrees from the fixed part of the first fixed part 40a. The upper end of the first support portion 40b slightly exceeds the one end 31b of the cable chain 31.

  The first cable chain support portion 33 is a plate-shaped member made of a steel plate whose upper portion is fixed to the first support portion 40b by a bolt member 42. The first cable chain support portion 33 is continuous from one end 31 b of the cable chain 31 on the vehicle body 22 side, and is linearly inclined downward toward the outside from the movement range of the transfer device 29. Accordingly, in FIG. 5, the first cable chain support portion 33 is inclined downwardly to the left. The inclination angle α of the first cable chain support portion 33 is the same as the inclination of the first support portion 40b of the first support bracket 40, and is approximately 60 degrees in this embodiment. The lower end 33a of the first cable chain support portion extends linearly to a position where the curved portion 31d of the cable chain 31 is disposed when the second base 51b is disposed at a position farthest from the first base 51a. . The curved portion 31d moves upward as the second base 51b approaches the first base 51a.

(7) Second cable chain support portion The second cable chain support portion 35 is disposed away from the first cable chain support portion 33 by a distance corresponding to the movable curvature of the cable chain 31 or more. The movable curvature of the cable chain 31, that is, the movable bending radius R of the curved portion 31d is, for example, 28 mm, and the second cable chain support portion 35 is twice the bending radius of the first cable chain support portion 33, that is, 56 mm or more. Placed apart. The 2nd cable chain support part 35 inclines below toward the outer side from the movement range of the transfer apparatus 29 as a whole.

  The second cable chain support portion 35 includes a second fixing portion 35a that is fixed to the first support portion 40b of the first support bracket 40, and a guide portion 35b that is formed by being bent from the second fixing portion 35a. ing. The guide portion 35b includes an introduction portion 35c, a bending portion 35d, a straight portion 35e, and a relief portion 35f in this order from the vehicle body 22 side. The introduction part 35c is arranged at the end on the transfer device 29 side and is curved downward. The curved portion 35d is curved in an arc shape to guide the cable chain 31 obliquely downward. The straight portion 35e is disposed substantially parallel to the first cable chain support portion 33. The straight portion 35e is bent from the second fixed portion 35a. The relief portion 35f is bent so as to be separated from the cable chain 31 from the end portion of the straight portion 35e.

(8) Lifting prevention part The lifting prevention part 37 includes a third fixing part 37a fixed to the second fixing part 35a, and a facing part 37b formed by bending from the third fixing part 37a. The facing portion 37b is disposed at a distance equal to or greater than the width W of the link 31a of the second cable chain support portion 35 and the cable chain 31, and is disposed so as to be inclined downward toward the outside of the moving range of the cable chain 31. The inclination angle β of the facing portion 37 b is slightly larger than the inclination angle α of the first cable chain support portion 33. In this embodiment, it is 62 degrees, for example. The upper end 37c of the facing portion 37b extends to a position substantially the same as the height position H of the upper surface of the cable chain 31 arranged in the left-right Y direction. A lower end portion 37 d of the facing portion 37 b is bent in a direction away from the cable chain 31.

(9) Operation of the transfer device When the transfer device 29 is in the loading operation of transferring the load from the transfer location to the transport vehicle 3, the second time until the transport vehicle 3 reaches the desired transfer position. The base 51b is arranged at a position matching the width of the luggage W. This position is a position where the load W can be hooked and pulled when the first hook arm portion 55c and the second hook arm portion 55d are swung from the second position to the first position. When loading the load W having the maximum width at this position, the curved portion 31 d of the cable chain 31 is arranged farthest from the transfer device 29. However, since the cable chain 31 is inclined downward toward the outside from the moving range of the transfer device 29, the cable chain 31 is disposed obliquely. For this reason, even if the transfer device is in the most open state, the curved portion 31d of the cable chain 31 does not protrude from the second cover portion 22c.

  When the transport vehicle 3 moves to the transfer location, the first arm 53a and the second arm 53ba are advanced toward the luggage storage shelf 11. When the second arm 53b advances, the first hook arm portion 55c and the second hook arm portion 55d on the side close to the transfer location are swung from the second position to the first position, and the end surface of the load W is hooked to the transport vehicle 3. Pull baggage W into

  On the other hand, when unloading the load W to the transfer location, when the transport vehicle 3 reaches the transfer location, the first arm 53a and the second arm 53b are moved backward toward the transfer location. Then, the first hook arm portion 55c and the second hook arm portion 55d on the side close to the transfer location are swung to the first position. In this state, the baggage W is pressed by the first hook arm portion 55c and the second hook arm portion 55d on the side close to the transfer place at the first position, and the baggage W is transferred to the baggage storage shelf 11.

(10) Effect of Embodiment (A) The transport vehicle 3 travels in the left-right Y direction (an example of the first direction), and transfers the load W (an example of an article) to and from the load storage shelf 11. The transport vehicle 3 includes a vehicle body 22, a transfer device 29, a cable chain 31, a first cable chain support portion 33, and a second cable chain support portion 35. The vehicle body 22 can travel in the left-right Y direction. The transfer device 29 is provided on the vehicle body 22 and moves in the left-right Y direction. The cable chain 31 has one end fixed to the vehicle body 22 and the other end fixed to the transfer device 29. The first cable chain support portion 33 is continuous from the fixed portion of the cable chain 31 on the vehicle body 22 side, and is inclined downward toward the outside from the moving range of the transfer device 29. The second cable chain support portion 35 is disposed away from the first cable chain support portion 33 by a distance corresponding to the movable curvature of the cable chain 31 and is inclined downward toward the outside from the moving range of the transfer device 29.

  In the transport vehicle 3, the vehicle body 22 can travel in the left-right Y direction, and the transfer device 29 provided on the vehicle body 22 also moves in the left-right Y direction with respect to the transport vehicle 3. When the transfer device moves relative to the transport vehicle 3 in a direction in which the one end 31b and the other end 31c of the cable chain 31 approach each other, the curved portion 31d is gradually separated from the fixed portion. At this time, the one end 31b side fixed to the vehicle body 22 of the cable chain 31 up to the curved portion 31d is supported by the first cable chain support portion 33, and the other end 31c side is supported by the second cable chain support portion 35. . Since the first cable chain support portion 33 and the second cable chain support portion 35 are inclined downward from the moving range of the transfer device 29 from the cable chain fixing portion, the cable chain 31 is disposed obliquely. For this reason, rather than arranging the cable chain 31 horizontally, the length in the left-right Y direction occupied by the cable chain can be shortened. Here, since the cable chain 31 can be disposed obliquely so that the curved portion 31d is disposed below the fixed portion, an increase in the length of the transport vehicle 3 in the traveling direction can be suppressed even if the cable chain 31 is disposed. Can do.

(B) The transport vehicle 3 is arranged at a distance W or more apart from the second cable chain support portion 35 and the link 31a of the cable chain 31, and the cable lift prevention portion 37 is inclined downward toward the outside of the moving range of the cable chain. May be further provided.
Thereby, even if the cable chain 31 is disposed obliquely, the cable chain 31 can be prevented from being lifted.

(C) In the transport vehicle 3, the upper end 37 c of the cable lifting prevention portion 37 extends to substantially the same position as the height position H of the upper surface of the cable chain 31 arranged in the left-right Y direction.
In this case, it is possible to prevent the cable chain 31 from being lifted with a minimum length.

(11) Other Embodiments Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention. In particular, a plurality of embodiments and modifications described in this specification can be arbitrarily combined as necessary.

  (A) In the said embodiment, although this invention was demonstrated to the transfer apparatus which opens and closes with respect to the conveyance vehicle 3 as an example, this invention is not limited to this. For example, the transport vehicle includes a stacker crane having a lifting platform. A transport vehicle in which a transfer device that moves to a plurality of transfer positions in the traveling direction of the stacker crane is provided on the lifting platform is also included in the present invention. That is, the present invention is applicable to all transport vehicles including a transfer device that moves in the traveling direction of the vehicle body and a cable chain that is fixed to the transfer device.

  (B) In the above-described embodiment, the first arm 53a includes the first intermediate arm portion 54a and the first tip arm portion 55a (or the second arm 53b includes the second intermediate arm portion 54b and the second tip arm portion 55b). However, the present invention is not limited to such an embodiment. Each of the first arm and the second arm may be composed of one arm portion.

  (C) In the above-described embodiment, only the second arm is configured to move in the opening and closing direction. However, the first arm may be opened and closed in conjunction with the second arm. In this case, the article may be sandwiched between the first arm and the second arm without providing the first hook arm and the second hook arm.

  The transport vehicle according to the present invention can be widely applied to, for example, a transport vehicle of an automatic warehouse.

DESCRIPTION OF SYMBOLS 1 Automatic warehouse 2a Front rack 2b Rear rack 3 Carrier vehicle 5 Traveling passage 7 1st support | pillar 9 2nd support | pillar 11 Luggage storage shelf 17 Warehousing station 19 Unloading station 21 Rail 22 Car body 22a Frame 22b 1st cover part 22c 2nd cover part 23a Drive wheel 23b Follower wheel 29 Transfer device 31 Cable chain 31a Link 31b One end 31c Other end 31d Curved portion 33 First cable chain support portion 33a Lower end 35 Second cable chain support portion 35a Second fixing portion 35b Guide portion 35c Introducing portion 35d Curved portion 35e Linear portion 35f Escape portion 37 Lift prevention portion 37a Third fixing portion 37b Opposing portion 37c Upper end 37d Lower end portion 40 First support bracket 40a First fixing portion 40b First support portion 42 Bolt member 51a First base 51b Second Base 53a First arm 53b Second arm 54a First intermediate arm portion 54b Second intermediate arm portion 55a First tip arm portion 55b Second tip arm portion 55c First hook arm portion 55d Second hook arm portion 60 First drive portion 61 Second Drive Unit 62 Ball Screw Shaft 64 Nut Member 69 Spline Shaft 87 Traveling Motor 90 Arm Open / Close Motor 92 Arm Movement Motor

Claims (3)

A transport vehicle that travels in a first direction and transfers articles to and from the transfer location,
A vehicle body capable of traveling in the first direction;
A transfer device provided on the vehicle body and moving in the first direction relative to the vehicle body;
A cable chain having one end fixed to the vehicle body and the other end fixed to the transfer device;
A first cable chain support portion that is continuous from a fixed portion of the cable chain on the vehicle body side and is inclined downward toward the outside from a moving range of the transfer device;
A second cable chain support portion that is disposed away from the first cable chain support portion by a distance corresponding to the movable curvature of the cable chain, and that is inclined downward toward the outside of the moving range of the transfer device;
A transport vehicle comprising:   2. The cable lifting prevention unit according to claim 1, further comprising a cable lifting prevention unit that is disposed at a distance equal to or greater than a width of the link of the second cable chain support unit and the cable chain and is inclined downward toward the outside of the moving range of the cable chain. Transport vehicle.   The transport vehicle according to claim 2, wherein an upper end of the cable lifting prevention portion extends to a position substantially the same as a height position of an upper surface of the cable chain disposed in the first direction.

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