Driving restriction device

Abstract

To provide a traveling regulation device capable of quickly emergency-stopping a carrier vehicle even when the carrier vehicle unintentionally starts traveling.SOLUTION: A traveling regulation device 1 for regulating traveling of a carrier vehicle in a conveyance facility provided with a travel rail 20, wheels 11 rolling on the travel surface 21 of the travel rail, a drive unit of the wheels 11, and the carrier vehicle that includes a bumper 14 for emergency-stopping the drive unit and travels on the travel rail 20, comprises: a mount 4 mounted on the travel surface 21; and an erect part 3 erected above the travel surface 21. The erect part 3 is provided with an opposite part 5 disposed at a position opposite to the bumper 14 from a traveling-direction separate side X2 in a state where the mount 4 is mounted on the travel surface 21. The mount 4 is provided with an underlay 41 set in a positional relationship with the opposite part 5 so as to serve as an underlay of the wheel 11 in a state where the bumper 14 is in contact with the opposite part 5.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a travel restriction device. [Background technology]

[0002] For example, International Publication No. 2014 / 129066 (Patent Document 1) discloses technology related to an automated warehouse. In the following description of the background art, the reference numerals in parentheses refer to those in Patent Document 1.

[0003] The automated warehouse of Patent Document 1 uses a transport vehicle (stacker crane 2) as a transport device for transporting articles. The transport vehicle includes a lower carriage (4) that travels on a lower rail (12), an upper carriage (6) that travels on an upper rail (14), a mast (8) that is fixed to the lower carriage (4) and connects the lower carriage (4) and the upper carriage (6), and a transfer device (10) provided on the mast (8). The lower carriage (4) includes wheels (drive wheels 22) and a support portion (28) located away from the wheels. The lower carriage (4) is also provided with a displacement mechanism. The displacement mechanism raises and lowers the support portion (28) between a ground position where the support portion (28) is supported by the lower rail (12) and a retracted position where the support portion (28) is above the lower rail (12). When the transport vehicle is in operation, the support portion (28) is raised to the retracted position. When the transport vehicle is to be installed on the lower rail (12) and the upper rail (14) or when the transport vehicle is to be stopped for maintenance, the support portion (28) is lowered to the ground contact position. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2014 / 129066 Summary of the Invention [Problem to be solved by the invention]

[0005] In the automated warehouse of Patent Document 1, the posture of the lower carriage (4) and the mast (8) can be stabilized by lowering the support part (28) to the ground contact position. This makes it easier to install the transport vehicle on the rail and to perform maintenance work on the transport vehicle. However, there are cases where a worker needs to move the transport vehicle while performing such work, and the transport vehicle may unintentionally start moving while moving. In such cases, the transport vehicle needs to be stopped immediately from the perspective of ensuring the safety of the workers and avoiding damage to equipment, but Patent Document 1 does not mention this point.

[0006] Therefore, there is a need for a travel restriction device that can quickly bring the transport vehicle to an emergency stop even if the transport vehicle starts traveling unintentionally. [Means for solving the problem]

[0007] A travel restriction device according to the present disclosure is a travel restriction device for restricting travel of a transport vehicle in a transport facility including a travel rail, wheels that roll on a travel surface of the travel rail, a drive unit for the wheels, and a transport vehicle that travels along the travel rail and is equipped with a bumper that brings the drive unit to an emergency stop upon collision with an obstacle, and a mounting portion to be placed on the travel surface; and an erecting portion fixed to the mounting portion and erected above the travel surface, The direction along the traveling rail is defined as a traveling direction, the side away from the wheel in the traveling direction is defined as a traveling direction away side, and the side approaching the wheel in the traveling direction is defined as a traveling direction approach side, the upright portion includes an opposing portion that is arranged at a position opposing the bumper from a side away from the traveling direction when the placement portion is placed on the traveling surface, The mounting portion includes an underlay portion that is positioned relative to the opposing portion so that the wheel is underlay when the bumper is in contact with the opposing portion. 、 The distance in the traveling direction between a surface of the facing portion facing the bumper and a leading end of the underlay portion on a side closer to the traveling direction is equal to or less than the distance between an end of the bumper on a side farther from the traveling direction and an axis of the wheel. .

[0008] According to this configuration, when a transport vehicle is stopped and a worker or the like is performing work near the transport vehicle, for example, by installing a travel restriction device so that the placement section is placed on the travel surface, the transport vehicle can be stopped immediately even if the transport vehicle starts traveling unintentionally. That is, when the transport vehicle is traveling and the bumper abuts the opposing section, the underlay section of the placement section is placed under the wheels. Furthermore, because the opposing section is fixed to the placement section, the opposing section is not pushed by the transport vehicle and can move, and the opposing section can hold the bumper. Therefore, the drive device of the transport vehicle can be reliably stopped in an emergency. In this way, with this configuration, even if the transport vehicle starts traveling unintentionally, the transport vehicle can be brought to an emergency stop quickly. Furthermore, with this configuration, if the travel restriction device is installed at a position where the tip of the underlay part on the approaching side in the travel direction contacts the outer circumferential surface of the wheel, the opposing part is positioned opposite the bumper with a small gap. Therefore, even if the transport vehicle starts traveling unintentionally, the travel distance of the transport vehicle can be minimized and the transport vehicle can be stopped.

[0009] Further features and advantages of the travel restriction device will become apparent from the following description of exemplary, non-limiting embodiments thereof, which is given with reference to the drawings. [Brief explanation of the drawings]

[0010] [Figure 1] Perspective view of a travel restriction device [Figure 2] Rear view of the driving restriction device [Figure 3] FIG. 10 is a plan view schematically showing the traveling carriage of the transport vehicle; [Figure 4] Control Block Diagram [Figure 5] FIG. 1 is a side view schematically illustrating the arrangement of a travel restriction device, wheels, a bumper, and wheel support members; [Figure 6] FIG. 1 is a side view schematically illustrating the arrangement of a travel restriction device, wheels, a bumper, and wheel support members; [Figure 7] FIG. 1 is a side view schematically illustrating the arrangement of a travel restriction device, wheels, a bumper, and wheel support members; [Figure 8] FIG. 1 is a side view schematically illustrating the arrangement of a travel restriction device, wheels, a bumper, and wheel support members; [Figure 9] FIG. 10 is a side view schematically showing an upright portion in another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the travel restriction device will be described with reference to the drawings, in which an example is used in a transport device.

[0012] As shown in FIGS. 1 to 4 , the conveying equipment 9 includes a traveling rail 20 and a transport vehicle 10 that travels along the traveling rail 20. In this embodiment, the conveying equipment 9 is configured to transport articles. Specifically, the transport vehicle 10 is an article transport vehicle that transports articles, and transports the articles to a predetermined destination by traveling along the traveling rail 20. The conveying equipment 9 is, for example, provided inside an automated warehouse that has storage shelves that store multiple articles, and is used to load and unload articles between the inside and outside of the storage shelves.

[0013] As shown in Figures 3 and 4, the transport vehicle 10 includes wheels 11 that roll on the running surface 21 of the travel rail 20, a drive unit 12 for the wheels 11, and a first bumper 14 that brings the drive unit 12 to an emergency stop when the wheel 11 collides with an obstacle. In this embodiment, the transport vehicle 10 includes a plurality of wheels 11 and a plurality of first bumpers 14 corresponding to the plurality of wheels 11, respectively. In the example of Figure 3, the number of wheels 11 and the number of first bumpers 14 are the same. The first bumpers 14 correspond to the "bumper."

[0014] 1 and 5 to 8, the direction along the traveling rail 20 will be referred to as the traveling direction X, the side away from the wheel 11 in the traveling direction X will be referred to as the traveling direction away side X2, and the side approaching the wheel 11 in the traveling direction X will be referred to as the traveling direction approach side X1. Also, as shown in FIGS. 1 to 3, the direction perpendicular to the traveling direction X when viewed from above and below will be referred to as the width direction Y.

[0015] In this example, as shown in FIG. 3, a pair of traveling rails 20 are provided so as to be separated in the width direction Y. The transport vehicle 10 is configured to travel in the traveling direction X while being guided by the pair of traveling rails 20. In this example, the transport vehicle 10 further includes a traveling carriage unit 17 that moves while being guided by the pair of traveling rails 20, a transfer device 28 (FIG. 4), a lifting unit 27 (FIG. 4), a second bumper 18, and a control unit H (FIG. 4). The traveling carriage unit 17 is provided with a plurality of wheels 11 attached thereto, as well as with a drive unit 12 that drives these wheels 11 and a control unit H (FIG. 4). The traveling carriage unit 17 is also provided with the second bumper 18. In the example of FIG. 3, two pairs of wheels 11 are arranged so as to be separated in the traveling direction X. The two pairs of wheels 11 are arranged so as to be separated in the width direction Y so as to correspond to the pairs of traveling rails 20, respectively. In other words, two wheels 11 arranged separately in the traveling direction X roll on the traveling surface 21 of one traveling rail 20. Here, each of the plurality of wheels 11 is attached to the traveling carriage unit 17 via a wheel support member 71. In the example of FIG. 3, a plurality of guide wheels 24 corresponding to each of the pair of traveling rails 20 are provided on the traveling carriage unit 17. The plurality of guide wheels 24 are arranged in pairs so as to sandwich the traveling rail 20 in the width direction Y.

[0016] The drive unit 12 includes a travel motor M (electric motor) and a transmission mechanism 19 that transmits the driving force of the travel motor M to the wheels 11. In the example of Fig. 3, the travel motor M and the transmission mechanism 19 are arranged to correspond to two pairs of wheels 11 that are spaced apart in the travel direction X. Driven by the drive unit 12, the multiple wheels 11 roll on the travel surface 21 of the travel rail 20 and the multiple guide wheels 24 rotate around axes that extend in the up-down direction, causing the traveling bogie unit 17 to move along the travel direction X.

[0017] The transfer device 28 is configured to hold the items being transported and to transfer the items to and from the transfer target location. The transfer device 28 places and holds the items, and transfers the items to and from the transfer target location by taking the items in and out in the width direction Y. In this example, the transfer device 28 is of a conveyor type, but it may also be of a slide fork type, etc. Here, the transfer device 28 is provided on the lifting unit 27. In this example, the transport vehicle 10 is a stacker crane. Therefore, a mast (not shown) is provided on the traveling cart unit 17 along the vertical direction. The lifting unit 27 is configured to be able to rise and fall along the mast.

[0018] The transport vehicle 10 is not limited to a stacker crane, and may be a transport vehicle (so-called shuttle vehicle) that carries and transports articles. In that case, the transfer device 28 may be provided in the traveling vehicle section 17. The transport vehicle 10 may also be a parent vehicle that can carry a child vehicle that travels in the width direction Y to transport articles, or may be a ceiling transport vehicle that travels while being guided by rails suspended and supported from the ceiling.

[0019] As shown in FIG. 3, the wheel support member 71 is provided on the traveling carriage unit 17 and supports the wheel 11 rotatably around an axis P along the width direction Y. Here, the wheel support member 71 is formed to cover both outer sides of the wheel 11 in the traveling direction X and the outer side in the width direction Y (the side on which the traveling carriage unit 17 is not arranged). In this example, the lower end portion 74 of the wheel support member 71 is set as the lower end portion 72 on the side X2 away from the traveling direction of the wheel support member 71. Naturally, the lower end portion 74 of the wheel support member 71 is set to be higher than the lower end of the wheel 11. Note that, although the wheel support member 71 is formed in a circular shape in the examples of FIGS. 5 to 8, the shape is not limited to this.

[0020] As shown in FIG. 3 , a plurality of first bumpers 14 are disposed corresponding to the plurality of wheels 11, respectively. The first bumpers 14 are disposed on the traveling direction away side X2 of the wheels 11 and the wheel support members 71. In this example, the first bumpers 14 are fixed to the wheel support members 71 via bumper support members 76. In the example of FIG. 3 , a total of four first bumpers 14 are disposed corresponding to two pairs of wheels 11. When viewed in the up-down direction, the first bumpers 14 are disposed so as to protrude in the traveling direction X relative to at least the traveling carriage unit 17, the wheels 11, and the wheel support members 71, among the elements constituting the transported vehicle 10. In addition, when an object such as an obstacle is placed on the traveling rail 20 ahead of the transported vehicle 10 in the traveling direction, the first bumpers 14 are configured to come into contact with the object, in principle.

[0021] In this embodiment, the transport vehicle 10 further includes a switch unit 7. The switch unit 7 is configured to be turned on, for example, when an obstacle or the like on the traveling rail 20 ahead of the transport vehicle 10 in the traveling direction hits the first bumper 14. When the switch unit 7 switches from an off state to an on state, the power supply to the drive unit 12 is cut off, and the transport vehicle 10 stops. In this example, the first bumper 14 has a switch function. That is, the first bumper 14 itself serves as the switch unit 7. Specifically, if the tip of the first bumper 14 comes into contact with another object and is pushed inward (toward the approaching side X1 in the traveling direction) while the transport vehicle 10 is traveling, the transport vehicle 10 stops. In this way, since the first bumper 14 has a switch function, when the transport vehicle 10 collides with an object on the traveling rail 20, in addition to its original function of protecting the wheels 11, wheel support members 71, traveling cart unit 17, etc. from the impact, it also performs a function of bringing the transport vehicle 10 to an emergency stop. The switch unit 7 may be provided separately from the first bumper 14. For example, the switch unit 7 may be provided on the traveling carriage unit 17, the wheel support member 71, or the like.

[0022] As shown in FIG. 3 , the second bumpers 18 are disposed on both outer sides of the traveling carriage unit 17 in the traveling direction X. The second bumpers 18 are disposed so as to be sandwiched between a pair of traveling rails 20. In the example shown in FIG. 3 , each of the two second bumpers 18 is disposed between a pair of first bumpers 14 disposed separately in the width direction Y. The second bumpers 18 are positioned at the same position as the pair of first bumpers 14 in the traveling direction X, but may be disposed at positions offset from each other in the traveling direction X. In this example, the second bumpers 18 have the function of protecting the traveling carriage unit 17 and the like from impact when the transport vehicle 10 collides with an obstacle or the like ahead in the traveling direction. However, unlike the first bumpers 14, the second bumpers 18 do not have the function of bringing the transport vehicle 10 to an emergency stop. However, the second bumpers 18 may also have the function of bringing the transport vehicle 10 to an emergency stop. For example, the transport vehicle 10 may be brought to an emergency stop by providing the second bumper 18 with a switch function or a sensor for detecting an object ahead in the traveling direction.

[0023] For example, when the control unit H receives command information from a host controller that controls the entire automated warehouse (not shown), it controls the lifting unit 27, the transfer device 28, and the drive device 12 based on the command information. Furthermore, when the first bumper 14 switches from an off state to an on state, the control unit H cuts off the power supply to the drive device 12 to stop the transport vehicle 10. The control unit H is equipped with a processor such as a microcomputer and peripheral circuits such as a memory, and the above-mentioned functions are realized by cooperation between these hardware components and a program executed on the hardware such as the processor.

[0024] As shown in FIGS. 1 and 5 to 8 , the travel restriction device 1 restricts the travel of the guided vehicle 10. The travel restriction device 1 is configured to be placed on the travel surface 21 of the travel rail 20 to prevent the guided vehicle 10 from traveling beyond the travel restriction device 1. Specifically, the travel restriction device 1 is disposed on the travel direction away side X2 of the wheels 11 so as to face the wheels 11 of the guided vehicle 10. For example, when a worker performs maintenance work on the guided vehicle 10 (here, a stacker crane), the worker places the travel restriction device 1 on the travel surface 21 so as to correspond to the wheels 11 of the stopped guided vehicle 10. In this example, the guided vehicle 10 has multiple (here, four) wheels 11. The worker may use multiple travel restriction devices 1 to correspond to all of the multiple wheels 11, or may use one or more travel restriction devices 1 to correspond to some of the multiple wheels 11. For example, the worker may use one or more travel restriction devices 1 to correspond to only the wheels 11 arranged on one of the pair of travel rails 20. Here, the travel restriction device 1 includes a mounting portion 4 that is placed on a travel surface 21, and an upright portion 3 that is fixed to the mounting portion 4 and stands above the travel surface 21. In this embodiment, the upright portion 3 is configured to come into contact with the first bumper 14 when the transport vehicle 10 travels toward the travel restriction device 1. The mounting portion 4 is a plate-shaped member, and is configured so that the wheels 11 climb up from the travel rail 20 onto the mounting portion 4 when the transport vehicle 10 travels toward the travel restriction device 1. The specific configuration of the travel restriction device 1 will be described below.

[0025] As shown in FIGS. 1, 2, and 5, the standing portion 3 includes a facing portion 5 that is disposed in a position facing the first bumper 14 from the farther side X2 in the traveling direction when the mounting portion 4 is placed on the traveling surface 21. The facing portion 5 comes into contact with the first bumper 14 when the transport vehicle 10 travels toward the traveling restriction device 1. In this embodiment, the vertical dimension of the facing portion 5 is set to correspond to the vertical position of the first bumper 14. In this embodiment, as shown in FIGS. 1, 2, and 5, the facing portion 5 includes a fixed facing member 53 fixed to the mounting portion 4, and a detachable facing member 55 that is disposed on the closer side X1 in the traveling direction than the fixed facing member 53 and is attached so as to be detachable from the mounting portion 4. In this example, both the fixed facing member 53 and the detachable facing member 55 are polygonal pillar-shaped members. The detachable opposing member 55 is attached to the fixed opposing member 53 with a surface of the detachable opposing member 55 facing the farther side X2 in the travel direction abutting against a surface of the fixed opposing member 53 facing the closer side X1 in the travel direction (an auxiliary opposing surface 52, described later). Here, the detachable opposing member 55 is fixed to the fixed opposing member 53 with a fastening member 62. More specifically, as shown in FIG. 2 , an insertion hole 64 is formed in the back surface of the fixed opposing member 53 (here, the surface facing the farther side X2 in the travel direction). The detachable opposing member 55 is fixed to the fixed opposing member 53 by inserting and fastening the fastening member 62 into the insertion hole 64. The detachable opposing member 55 can be detached from the fixed opposing member 53 by performing the reverse procedure. In this manner, the detachable opposing member 55 is not fixed to the placement unit 4 but is fixed only to the fixed opposing member 53. The detachable opposing member 55 may be attached to the fixed opposing member 53 by means other than the fastening member 62. The detachable opposing member 55 may be fixed to a portion of the travel restriction device 1 other than the fixed opposing member 53 (for example, the placement portion 4).

[0026] As shown in FIGS. 1 and 5 to 8 , the detachable opposing member 55 has an opposing surface 51 that faces the first bumper 14 from the traveling direction away side X2. The opposing surface 51 is the surface of the detachable opposing member 55 that faces the traveling direction approaching side X1. In the example of FIG. 5 , the opposing surface 51 is the surface of the detachable opposing member 55 that is formed closest to the traveling direction approaching side X1 and is formed along the vertical direction and the width direction Y. In this embodiment, the opposing surface 51 is disposed to correspond to the vertical position of the first bumper 14. Here, the opposing surface 51 is disposed so that, when the guided vehicle 10 travels toward the travel restriction device 1, the end 16 of the traveling direction away side X2 of the first bumper 14 abuts against the vertical center of the opposing surface 51.

[0027] As shown in FIGS. 1 and 5 to 8, the facing portion 5 has an inclined upper surface 57 that is an upper surface that slopes upward toward the traveling direction away side X2. In this example, the inclined upper surface 57 is formed on the detachable facing member 55. The inclined upper surface 57 is formed so as to continue from the upper end of the facing surface 51. Here, the inclined upper surface 57 is a surface that slopes upward from the upper end of the facing surface 51 toward the traveling direction away side X2. In the example of FIG. 5, an upper surface that follows the horizontal plane of the detachable facing member 55 is formed continuously from the upper end of the inclined upper surface 57 (end 59 on the traveling direction away side X2). In this embodiment, as shown in FIG. 5, an end 58 on the traveling direction approaching side X1 of the inclined upper surface 57 is located below a lower end 72 on the traveling direction away side X2 of a wheel support member 71 that supports the wheels 11 of the guided vehicle 10. Furthermore, the end 59 of the inclined upper surface 57 on the side away from the travel direction X2 is positioned above the lower end 72 of the wheel support member 71 on the side away from the travel direction X2. That is, the vertical position of the inclined upper surface 57 is set so that the vertical position of the lower end 72 of the wheel support member 71 on the side away from the travel direction X2 is included within the vertical range of the inclined upper surface 57. Furthermore, in this embodiment, the vertical position of the inclined upper surface 57 is set so that the vertical position of the lower end 72 of the wheel support member 71 on the side away from the travel direction X2 is included within the vertical range of the inclined upper surface 57 when the wheels 11 have climbed up from the travel surface 21 onto the upper surface 43 of the mounting unit 4. In this way, the end 58 of the inclined upper surface 57 on the traveling direction approaching side X1 is positioned lower than the lower end 72 of the traveling direction away side X2 of the wheel support member 71, both when the wheel 11 is placed on the running surface 21 and when it is placed on the upper surface 43 of the mounting section 4, and the end 59 of the inclined upper surface 57 on the traveling direction away side X2 is positioned higher than the lower end 72 of the traveling direction away side X2 of the wheel support member 71, both when the wheel 11 is placed on the running surface 21 and when it is placed on the upper surface 43 of the mounting section 4.

[0028] 5, an inclined surface is formed that slopes downward from the lower end of the opposing surface 51 toward the traveling direction separating side X2. The bottom surface of the detachable opposing member 55 is formed continuously from the lower end of this inclined surface. In the illustrated example, the detachable opposing member 55 is a polygonal prism (specifically, a hexagonal prism), but is not limited to this. The detachable opposing member 55 may be a plate-like member or a rounded member. Furthermore, the opposing surface 51 is not limited to a surface that extends in the up-down direction and the width direction Y, and may be formed, for example, as a rounded surface so as to follow the shape of the first bumper 14.

[0029] 2, in this embodiment, a dimension 84 of the detachable opposing member 55 in the width direction Y is larger than a dimension 85 of the traveling rail 20 in the width direction Y. In addition, in this example, the dimension 84 of the detachable opposing member 55 in the width direction Y is larger than a dimension 87 of the fixed opposing member 53 in the width direction Y. As a result, the detachable opposing member 55 is disposed so as to protrude on both sides in the width direction Y relative to the traveling rail 20 and the fixed opposing member 53 when viewed in the traveling direction X. Note that, in the illustrated example, the dimension 87 of the fixed opposing member 53 in the width direction Y is smaller than the dimension 85 of the traveling rail 20 in the width direction Y, but this is not limited to this.

[0030] As shown in FIGS. 5 to 8 , the fixed opposing member 53 includes an auxiliary opposing surface 52 that faces the first bumper 14 from the traveling direction away side X2 when the detachable opposing member 55 is removed. In this example, the auxiliary opposing surface 52 faces the traveling direction approach side X1 of the fixed opposing member 53 and is formed along the vertical direction and the width direction Y. As shown in FIG. 7 , without the detachable opposing member 55, when the guided vehicle 10 travels toward the travel restriction device 1, the auxiliary opposing surface 52 abuts against the first bumper 14. In this embodiment, the auxiliary opposing surface 52 is positioned to correspond to the vertical position of the first bumper 14. The auxiliary opposing surface 52 is positioned so that when the guided vehicle 10 travels toward the travel restriction device 1, the end 16 of the traveling direction away side X2 of the first bumper 14 abuts against the vertical center of the auxiliary opposing surface 52. In the illustrated example, the fixed opposing member 53 is a polygonal prism. More specifically, the fixed opposing member 53 is a rectangular prism-shaped member. The fixed opposing member 53 may be a plate-like member or a rounded member. The auxiliary opposing surface 52 is not limited to a surface extending in the up-down direction and the width direction Y, and may be formed, for example, as a rounded surface so as to conform to the shape of the first bumper 14. The fixed opposing member 53 is fixed to the mounting portion 4 via a connecting member (not shown). For example, the standing portion 3 includes an L-shaped metal fitting as a connecting member, and the fixed opposing member 53 is fixed to the mounting portion 4 via the L-shaped metal fitting and a fastening member or the like. The fixed opposing member 53 may be directly fixed to the mounting portion 4 by a fastening member or the like, or may be fixed by other means. The fixed opposing member 53 and the mounting portion 4 may be integrally formed. The configuration of the mounting portion 4 will be described in detail below.

[0031] As shown in FIG. 1, in this embodiment, the placing portion 4 is formed of a flat plate-like member. The dimension of the placing portion 4 in the width direction Y is set according to the dimensions of the running surface 21 of the running rail 20 and the wheels 11 in the width direction Y. In the example of FIG. 1, the placing portion 4 is formed in a rectangular shape that is long in the running direction X when viewed in the up-down direction. The dimension of the placing portion 4 in the width direction Y is the same as the dimension of the running surface 21 in the width direction Y. In the example of FIG. 3, the dimension of the wheels 11 in the width direction Y is the same as the dimension of the running surface 21 in the width direction Y. Therefore, the dimension of the placing portion 4 in the width direction Y is also the same as the dimension of the wheels 11 in the width direction Y. Note that the placing portion 4 may have another shape, such as a wedge shape. In this embodiment, as shown in FIGS. 1 and 2, the placing portion 4 has a pair of guide portions 44 that are arranged on both outer sides of the running rail 20 in the width direction Y. do. Each of the pair of guide portions 44 has a guide surface 45 that faces the side surface 23 of the traveling rail 20. The pair of guide portions 44 are provided on the mounting portion 4, separated in the width direction Y. In this example, each of the pair of guide portions 44 has a guide support portion 44a and a block portion 44b. When the travel restriction device 1 is placed on the running surface 21 of the traveling rail 20, the pair of guide support portions 44a are arranged to protrude outward in the width direction Y from the mounting portion 4 and the running surface 21. In the illustrated example, the pair of guide support portions 44a are formed integrally with the mounting portion 4. The guide support portion 44a extends outward in the width direction Y from a partial region at the end of the mounting portion 4 in the width direction Y. Here, the guide support portion 44a supports the block portion 44b from above. The block portion 44b is arranged below the mounting portion 4 and is arranged along the side surface 23 of the traveling rail 20. The guide surfaces 45 are surfaces that face inward in the width direction Y of the block portions 44b (the side facing the traveling rail 20). When the travel restriction device 1 is placed on the traveling surface 21 of the traveling rail 20, the guide surfaces 45 of the pair of guide portions 44 abut against the side surfaces 23 of the traveling rail 20. This restricts movement of the travel restriction device 1 in the width direction Y. Therefore, the travel restriction device 1 can be stably attached to the traveling rail 20.

[0032] As shown in FIGS. 1 and 5 to 8 , the mounting portion 4 includes an underlay portion 41 that is positioned relative to the facing portion 5 so that the wheel 11 is underlay when the first bumper 14 abuts against the facing portion 5. The underlay portion 41 is located on the mounting portion 4 on the approaching side X1 in the traveling direction relative to the upright portion 3. In this embodiment, the underlay portion 41 includes a plate-like portion 46 formed in a plate shape along the traveling surface 21, and a tapered portion 47 that is disposed on the approaching side X1 in the traveling direction relative to the plate-like portion 46 and has an upper surface 47a that slopes downward toward the approaching side X1 in the traveling direction. In this example, the plate-like portion 46 and the tapered portion 47 are formed integrally with the rest of the mounting portion 4. When the transport vehicle 10 travels toward the travel restriction device 1, the wheel 11 first transfers from the traveling surface 21 onto the upper surface 47a of the tapered portion 47. Thereafter, the wheel 11 moves from the upper surface 47a of the tapered portion 47 onto the upper surface 46a of the plate-like portion 46. In this example, as shown in Fig. 1 and Figs. 5 to 8, the underlay portion 41 covers the entire area of ​​the mounting portion 4 on the side X1 approaching the traveling direction with respect to the standing portion 3, but it may cover only the end area of ​​the mounting portion 4 on the side X1 approaching the traveling direction.

[0033] In this embodiment, when the underlay portion 41 is not underlaid by the wheel 11 and the tip end 42 of the underlay portion on the traveling direction approaching side X1 is in contact with the outer peripheral surface 15 of the wheel 11, the distance 82 in the running direction X between the opposing surface 51 and the tip end 42 of the underlay portion on the traveling direction approaching side X1 is set so that the opposing surface 51 facing the first bumper 14 of the opposing portion 5 comes into contact with the first bumper 14, or the opposing surface 51 and the first bumper 14 face each other with a gap 81 between them.

[0034] 5 , in this example, when the underlay portion 41 is not placed under the wheel 11 and the tip portion 42 of the underlay portion 41 on the traveling direction approaching side X1 is in contact with the outer circumferential surface 15 of the wheel 11, the distance 82 in the traveling direction X between the facing surface 51 and the tip portion 42 of the underlay portion 41 on the traveling direction approaching side X1 is set so that the facing surface 51 and the first bumper 14 face each other with a gap 81. Here, the tip portion 42 of the underlay portion 41 on the traveling direction approaching side X1 is formed as a tapered portion 47. In this way, when the wheel 11 is in contact with the tapered portion 47 of the underlay portion 41 but is not placed under the wheel 11 (when the lower end of the wheel 11 is directly supported by the traveling surface 21, directly below the axis P of the wheel 11), the first bumper 14 is positioned at a position separated by the gap 81 from the facing surface 51 of the detachable facing member 55. Therefore, in this example, the wheel 11 moves a distance equivalent to the gap 81 toward the opposing surface 51 (dashed arrow in FIG. 5), rides up onto the underlay portion 41, and in a state where the underlay portion 41 is under the wheel 11 (two-dot chain line in FIG. 5), the first bumper 14 comes into contact with the opposing surface 51. Furthermore, when the wheel 11 moves a specified amount of depression until the switch of the first bumper 14 switches from the off state to the on state, the power supply to the drive unit 12 that drives the wheel 11 is cut off.

[0035] In this example, the upper limit distance over which the transport vehicle 10 is allowed to travel is set to an allowable travel distance 86, and the gap 81 is set to be equal to or less than the allowable travel distance 86. Here, the allowable travel distance 86 is set taking into consideration the distance over which the travel restriction device 1 and the transport vehicle 10 will not be damaged by a collision between the opposing surface 51 and the first bumper 14. In other words, if the transport vehicle 10 starts traveling from a stopped state and travels beyond the allowable travel distance 86, causing the opposing surface 51 to collide with the first bumper 14, there is a risk that the travel restriction device 1 and the transport vehicle 10 will be damaged. Therefore, to avoid such a situation, the allowable travel distance 86 is set in advance. During maintenance of the transport vehicle 10, a worker can position the travel restriction device 1 so that the outer peripheral surface 15 of the wheel 11 contacts the upper surface 47a of the tapered portion 47. This allows the worker to minimize the travel of the transport vehicle 10 and bring it to an emergency stop even if the transport vehicle 10 starts traveling unintentionally. Here, the wheel 11 moves a distance of the gap 81, which is equal to or less than the allowable travel distance 86, and a specified push-in area of ​​the first bumper 14, so that the transport vehicle 10 can be brought to an emergency stop with a minimum movement amount without damaging the travel restriction device 1 or the transport vehicle 10. In the example of Fig. 5, the gap 81 is set to be smaller than the allowable travel distance 86.

[0036] In this embodiment, as shown in FIGS. 1 and 5 to 8 , a reference mark 6 indicating a reference for the installation position of the mounting unit 4 relative to the first bumper 14 is provided on the upper surface 43 of the mounting unit 4. The reference mark 6 is located at a position spaced apart by an allowable travel distance 86 from an opposing surface 51 of the opposing unit 5 that faces the first bumper 14. In the illustrated example, a scribed line is provided as the reference mark 6 on the approaching side X1 in the traveling direction relative to the opposing surface 51. Specifically, a groove is formed in the upper surface 46 a of the plate-shaped portion 46 of the underlay unit 41 along the width direction Y, and this groove serves as the scribed line serving as the reference mark 6. As shown in FIG. 6 , an operator can perform maintenance work while moving the transport vehicle 10 within the allowable travel distance 86 by placing the travel restriction device 1 on the traveling surface 21 so that the reference mark 6 is aligned with the end of the first bumper 14 on the receding side X2 in the traveling direction. That is, in this example, the allowable travel distance 86 is set taking into consideration the distance that a worker moves the transport vehicle 10 during maintenance work. In the example of Fig. 6, when the travel restriction device 1 is placed on the travel surface 21 so that a position (position of the reference mark 6) that is the allowable travel distance 86 away from the opposing surface 51 is aligned with the end of the traveling direction away side X2 of the first bumper 14, the wheel 11 is supported directly on the travel surface 21 without coming into contact with the underlay portion 41.

[0037] In this embodiment, a distance 82 in the traveling direction X between the opposing surface 51 of the opposing portion 5 facing the first bumper 14 and the tip end 42 on the traveling direction approaching side X1 of the underlying portion is equal to or less than a distance 83 between the end 16 on the traveling direction leaving side X2 of the first bumper 14 and the axis P of the wheel 11. In this example, as shown in FIG. 5 , the distance 82 in the traveling direction X between the opposing surface 51 and the tip end 42 (here, the tapered portion 47) is set to be smaller than the distance 83 between the end 16 on the traveling direction leaving side X2 of the first bumper 14 and the axis P of the wheel 11.

[0038] The example in FIG. 7 shows a state in which the stopped transport vehicle 10 unintentionally travels during maintenance work or the like, causing the first bumper 14 to come into contact with the opposing surface 51, and a process in which the detachable opposing member 55 is removed from the fixed opposing member 53. In FIG. 7, the transport vehicle 10 is stopped because the first bumper 14 has switched from the OFF state to the ON state. The underlay portion 41 (here, the tapered portion 47) is underlay by the wheel 11. Therefore, the travel restriction device 1 is fixed to the travel rail 20. The detachable opposing member 55 is subjected to a load in the travel direction X by the first bumper 14. In such a case, the fastening member 62 is removed, and then the detachable opposing member 55 can be removed from the fixed opposing member 53 by lifting the detachable opposing member 55 from below. As shown in FIGS. 1 and 2 , both ends of the detachable opposing member 55 are located on both outer sides of the travel rail 20 in the width direction Y. Therefore, for example, by pushing up both ends of the detachable opposing member 55 from below with a tool or the like, the detachable opposing member 55 can be relatively easily removed from the fixed opposing member 53. This is particularly useful when the transport vehicle 10 is inoperable due to a malfunction or the like, as shown in FIG. 7 . Furthermore, in the example of FIG. 7 , if the transport vehicle 10 begins unintentional travel after the detachable opposing member 55 has been removed from the fixed opposing member 53, the auxiliary opposing surface 52 of the fixed opposing member 53 is configured to abut against the first bumper 14. As a result, even if the transport vehicle 10 resumes unintentional travel with the detachable opposing member 55 detached, the first bumper 14 abuts against the auxiliary opposing surface 52, thereby returning the transport vehicle 10 to the on state and stopping the transport vehicle 10.

[0039] 8 shows a state in which the transport vehicle 10 starts traveling toward the facing surface 51 and the first bumper 14 climbs over the facing portion 5 (the detachable facing member 55 and the fixed facing member 53). As described above, the vertical position of the inclined upper surface 57 is set so that, when the wheels 11 climb over the upper surface 43 of the placement unit 4 from the travel surface 21, the vertical position of the lower end 72 of the travel direction away side X2 of the wheel support member 71 is included in the vertical range of the inclined upper surface 57. Therefore, when the transport vehicle 10 travels so that the first bumper 14 climbs over the facing portion 5, the lower end 72 of the travel direction away side X2 of the wheel support member 71 abuts against the inclined upper surface 57 and is guided by the inclined upper surface 57 to climb over the upper surface of the facing portion 5. As a result, the wheels 11 supported by the wheel support members 71 also rise, and the lower ends of the wheels 11 are raised above the travel surface 21 and the upper surface 43 of the placement unit 4. Therefore, the transport vehicle 10 can be prevented from traveling further to the side X2 away from the opposing portion 5 in the traveling direction.

[0040] Other Embodiments (1) In the above embodiment, the traveling carriage unit 17 is described as traveling along a pair of traveling rails 20, but the present invention is not limited to this. For example, the traveling carriage unit 17 may travel along a single traveling rail 20.

[0041] (2) In the above embodiment, the distance in the traveling direction X between the opposing surface 51 and the leading end 42 of the underlay portion on the traveling direction approaching side X1 is set so that the opposing surface 51 and the first bumper 14 face each other with a gap 81 when the underlay portion 41 is not placed under the wheel 11 and the leading end 42 of the underlay portion on the traveling direction approaching side X1 is in contact with the outer peripheral surface 15 of the wheel 11. However, the present invention is not limited to this. The distance in the traveling direction X between the opposing surface 51 and the leading end 42 of the underlay portion on the traveling direction approaching side X1 may be set so that the opposing surface 51 of the opposing portion 5 facing the first bumper 14 comes into contact with the first bumper 14 when the underlay portion 41 is not placed under the wheel 11 and the leading end 42 of the underlay portion on the traveling direction approaching side X1 is in contact with the outer peripheral surface 15 of the wheel 11. 5, the distance in the traveling direction X between the opposing surface 51 and the tip end 42 (here, the tapered portion 47) can be set so that the opposing surface 51 and the first bumper 14 come into contact without forming a gap 81. In maintenance work or the like, it is particularly preferable to use the traveling restriction device 1 set in this manner when the transport vehicle 10 is not to be moved.

[0042] (3) In the above embodiment, the distance 82 in the traveling direction X between the facing surface 51 of the facing portion 5 facing the first bumper 14 and the tip end 42 on the traveling direction approaching side X1 of the underlay portion is equal to or less than the distance 83 between the end 16 on the traveling direction leaving side X2 of the first bumper 14 and the axis P of the wheel 11. However, the present invention is not limited to this. The distance 82 in the traveling direction X between the facing surface 51 and the tip end 42 can also be set to be greater than the distance 83 between the end 16 on the traveling direction leaving side X2 of the first bumper 14 and the axis P of the wheel 11. By setting the distance 82 in this manner, for example, it is possible to configure the wheel 11 to travel toward the facing surface 51 from a state in which the underlay portion 41 is under the wheel 11, and the first bumper 14 and the facing surface 51 come into contact with each other.

[0043] (4) In the above embodiment, the facing portion 5 includes the fixed facing member 53 fixed to the mounting portion 4 and the detachable facing member 55 that is disposed closer to the approaching side X1 in the travel direction than the fixed facing member 53 and is attached so as to be detachable from the mounting portion 4. However, the present invention is not limited to this. The facing portion 5 may be configured without the detachable facing member 55. For example, the facing portion 5 may include the fixed facing member 53, and the surface of the fixed facing member 53 that faces the approaching side X1 in the travel direction may be the facing surface 51.

[0044] (5) In the above embodiment, the dimension 84 of the detachable opposing member 55 in the width direction Y is larger than the dimension 85 of the traveling rail 20 in the width direction Y, but this is not limited to this. The dimension 84 of the detachable opposing member 55 in the width direction Y may be equal to or smaller than the dimension 85 of the traveling rail 20 in the width direction Y.

[0045] (6) In the above embodiment, the mounting unit 4 is described as having a pair of guide portions 44 disposed on both outer sides of the traveling rail 20 in the width direction Y, but this is not limiting. The mounting unit 4 may have a guide portion 44 only on one side of the traveling rail 20 in the width direction Y. Furthermore, the mounting unit 4 does not necessarily have to have a pair of guide portions 44.

[0046] (7) In the above embodiment, the underlay portion 41 includes the plate-like portion 46 formed in a plate shape along the running surface 21 and the tapered portion 47 disposed on the approaching side X1 in the running direction relative to the plate-like portion 46 and having the upper surface 47a that slopes downward toward the approaching side X1 in the running direction. However, the present invention is not limited to this. The underlay portion 41 does not necessarily have to include the tapered portion 47.

[0047] (8) In the above embodiment, the opposing portion 5 includes the inclined upper surface 57, which is an upper surface that slopes upward toward the moving side X2. However, this is not limiting. For example, the opposing portion 5 does not need to include the inclined upper surface 57. In the above embodiment, the inclined upper surface 57 is formed so as to be continuous with the upper end of the opposing surface 51 of the detachable opposing member 55, and an upper surface that extends along the horizontal plane of the detachable opposing member 55 is formed so as to be continuous with the upper end of the inclined upper surface 57. However, this is not limiting. For example, as shown in FIG. 9 , the entire upward-facing surface of the detachable opposing member 55 may be the inclined upper surface 57. Note that in the example shown in FIG. 9 , unlike the above embodiment, the entire downward-facing surface of the detachable opposing member 55 is formed so as to be continuous with the horizontal plane. The inclined upper surface 57 may be formed on both the fixed opposing member 53 and the detachable opposing member 55.

[0048] (9) In the above embodiment, a configuration has been described in which the upper surface 43 of the mounting portion 4 is provided with a reference mark 6 indicating a reference for the installation position of the mounting portion 4 relative to the first bumper 14, but this is not limiting. The reference mark 6 does not have to be provided on the upper surface 43 of the mounting portion 4. In addition, in the above embodiment, a configuration has been described in which the upper surface 43 of the mounting portion 4 is provided with a groove-shaped scribed line along the width direction Y as the reference mark 6, but the reference mark 6 may be a sticker with a scribed line drawn on it, and the sticker may be attached to the upper surface 43 of the mounting portion 4, so that the position of the reference mark 6 can be changed to match the size of the wheel 11.

[0049] Summary of the above embodiment The embodiments of the travel restriction device described above will be summarized below.

[0050] A travel restriction device according to the present disclosure is a travel restriction device for restricting travel of a transport vehicle in a transport facility including a travel rail, wheels that roll on a travel surface of the travel rail, a drive unit for the wheels, and a transport vehicle that travels along the travel rail and is equipped with a bumper that brings the drive unit to an emergency stop upon collision with an obstacle, and a mounting portion to be placed on the travel surface; and an erecting portion fixed to the mounting portion and erected above the travel surface, The direction along the traveling rail is defined as a traveling direction, the side away from the wheel in the traveling direction is defined as a traveling direction away side, and the side approaching the wheel in the traveling direction is defined as a traveling direction approach side, the upright portion includes an opposing portion that is arranged at a position opposing the bumper from a side away from the traveling direction when the placement portion is placed on the traveling surface, The mounting portion includes an underlay portion that is positioned relative to the opposing portion so that the wheel is underlay when the bumper abuts against the opposing portion.

[0051] According to this configuration, when a transport vehicle is stopped and a worker or the like is performing work near the transport vehicle, for example, by installing a travel restriction device so that the placement section is placed on the travel surface, the transport vehicle can be stopped immediately even if the transport vehicle starts traveling unintentionally. That is, when the transport vehicle is traveling and the bumper abuts the opposing section, the underlay section of the placement section is placed under the wheels. Furthermore, because the opposing section is fixed to the placement section, the opposing section is not pushed by the transport vehicle and can move, and the opposing section can hold the bumper. Therefore, the drive device of the transport vehicle can be reliably stopped in an emergency. In this way, with this configuration, even if the transport vehicle starts traveling unintentionally, the transport vehicle can be brought to an emergency stop quickly.

[0052] Here, it is preferable that the distance in the running direction between the opposing surface and the tip end of the underlay portion on the side closer to the running direction is set so that, when the underlay portion is not underlaid on the wheel and the tip end of the underlay portion on the side closer to the running direction is in contact with the outer peripheral surface of the wheel, the opposing surface of the opposing portion facing the bumper comes into contact with the bumper, or the opposing surface and the bumper face each other with a gap between them.

[0053] According to this configuration, by installing the travel restriction device at a position where the tip of the underlay part on the approaching side in the travel direction contacts the outer circumferential surface of the wheel, the opposing part is arranged to contact the bumper or to face the bumper with a gap. Therefore, even if the transport vehicle starts traveling unintentionally, the travel distance of the transport vehicle can be minimized and the transport vehicle can be stopped.

[0054] It is also preferable that the distance in the traveling direction between the opposing surface of the opposing portion that faces the bumper and the tip of the underlay portion on the side closer to the traveling direction is equal to or less than the distance between the end of the bumper on the side farther from the traveling direction and the axis of the wheel.

[0055] According to this configuration, for example, if the travel restriction device is installed at a position where the tip of the underlay part on the approaching side in the travel direction contacts the outer circumferential surface of the wheel, the opposing part is positioned opposite the bumper with a small gap. Therefore, even if the transport vehicle starts traveling unintentionally, the travel distance of the transport vehicle can be minimized and the transport vehicle can be stopped.

[0056] The facing portion includes a fixed facing member fixed to the placement portion, and a detachable facing member disposed closer to the fixed facing member in the traveling direction and attached so as to be detachable from the placement portion, the detachable opposing member has an opposing surface that faces the bumper from a side away from the traveling direction, The fixed opposing member preferably has an auxiliary opposing surface that faces the bumper from a side away from the traveling direction when the detachable opposing member is detached.

[0057] With this configuration, even if the transport vehicle starts traveling unintentionally and then stops with the bumper pressed by the opposing surface of the detachable opposing member, a gap can be created between the bumper and the fixed opposing member of the opposing part by removing the detachable opposing member. Therefore, it is possible to easily release the emergency stop of the drive unit and restore the transport vehicle. Furthermore, with this configuration, even when the detachable opposing member is removed, the fixed opposing member has an auxiliary opposing surface that faces the bumper, so that even if the transport vehicle starts moving unintentionally during recovery work on the transport vehicle, the auxiliary opposing surface can hold down the bumper and the drive unit of the transport vehicle can be brought to an emergency stop.

[0058] Further, the direction perpendicular to the running direction when viewed in the up-down direction is defined as the width direction, It is preferable that the dimension of the detachable opposing member in the width direction be larger than the dimension of the traveling rail in the width direction.

[0059] According to this configuration, when the transport vehicle stops with the bumper being pressed by the opposing surface of the detachable opposing member, the detachable opposing member can be easily removed. For example, the detachable opposing member can be easily removed by pressing from below the portion of the detachable opposing member that protrudes from the rail in the width direction.

[0060] Further, the direction perpendicular to the running direction when viewed in the up-down direction is defined as the width direction, the mounting portion includes a pair of guide portions disposed on both outer sides of the traveling rail in the width direction, Preferably, each of the pair of guide portions has a guide surface that faces a side surface of the traveling rail.

[0061] According to this configuration, the travel restriction device can be easily positioned at an appropriate position in the width direction relative to the traveling rail, and the travel restriction device can be prevented from shifting in the width direction after being positioned.

[0062] It is also preferable that the underlay portion comprises a plate-like portion formed in a plate shape that conforms to the running surface, and a tapered portion that is arranged on the approaching side of the running direction relative to the plate-like portion and has an upper surface that slopes downward as it approaches the approaching side of the running direction.

[0063] With this configuration, even if the transport vehicle starts moving unintentionally, it is easy to minimize the vibrations that occur when the wheels climb onto the underlayment, thereby reducing the possibility that the behavior of the transport vehicle will become unstable due to the vibrations that occur when the wheels climb onto the underlayment.

[0064] The facing portion has an inclined upper surface that is an upper surface that is inclined upward as it approaches the away side in the traveling direction, an end portion of the inclined upper surface on the approaching side in the traveling direction is disposed below a lower end portion of a wheel support member that supports the wheels of the transporting vehicle on the receding side in the traveling direction; It is preferable that the end of the inclined upper surface on the side away from the traveling direction be positioned above the lower end of the wheel support member.

[0065] With this configuration, even if the transport vehicle starts moving unintentionally and does not stop even when the bumper hits the opposing part, the wheel support member can be made to ride up onto the tapered upper surface, so the wheels can be lifted up and the transport vehicle can be stopped from moving.

[0066] Furthermore, the upper limit distance that the transport vehicle is allowed to travel is defined as an allowable travel distance, a reference mark indicating a reference for the installation position of the mounting portion relative to the bumper is provided on an upper surface of the mounting portion; It is preferable that the reference mark be disposed at a position spaced apart from a surface of the facing portion that faces the bumper by the allowable travel distance.

[0067] According to this configuration, by installing the travel restriction device so that the tip of the bumper is positioned between the opposing part and the reference mark, even if the transport vehicle starts moving unintentionally, the travel restriction device can be easily installed in a position that allows the transport vehicle to be stopped appropriately while minimizing the travel distance of the transport vehicle.

[0068] It is sufficient for the travel restriction device according to the present disclosure to achieve at least one of the above-described effects. [Explanation of symbols]

[0069] 1: Driving control device 3: Standing section 4: Placement section 5: Opposing part 6: Reference mark 9:Transportation equipment 10: Transport vehicle 11: Wheels 12: Drive unit 14: First bumper (bumper) 15: Outer surface 16: End of the first bumper on the side away from the direction of travel 20: Running rail 21: Running surface 23: Side 42:Tip 43: Top surface of the mounting part 44: Guide section 45: Guide surface 46: Plate-shaped part 47: Tapered section 47a: Upper surface of tapered portion 51: Opposite surface 52: Auxiliary opposing surface 53: Fixed opposing member 55: Detachable opposing member 57: Inclined top surface 58: End of the inclined upper surface 57 on the approaching side X1 in the traveling direction 59: End of the inclined upper surface 57 on the side X2 away from the running direction 71: Wheel support member 72: Lower end of the wheel support member on the side X2 away from the running direction 81: Gap 82: Distance in the running direction X between the facing surface 51 and the tip 42 of the underlay part on the approaching side X1 in the running direction 83: Distance between the end 16 of the first bumper 14 on the side X2 away from the traveling direction and the axis P of the wheel 11 84: Dimension of the detachable opposing member 55 in the width direction Y 85: Dimension of the travel rail 20 in the width direction Y 86: Allowable driving distance P: Axis X: Direction of travel X1: Traveling direction is closer to the side X2: Traveling direction, separation side Y: width direction

Claims

1. A travel restriction device for restricting travel of a transport vehicle in a transport facility including a travel rail, wheels that roll on a travel surface of the travel rail, a drive unit for the wheels, and a bumper that brings the drive unit to an emergency stop upon collision with an obstacle, the travel restriction device comprising: a mounting portion to be placed on the travel surface; and an erecting portion fixed to the mounting portion and erected above the travel surface, The direction along the traveling rail is defined as a traveling direction, the side away from the wheel in the traveling direction is defined as a traveling direction away side, and the side approaching the wheel in the traveling direction is defined as a traveling direction approach side, the upright portion includes an opposing portion that is arranged at a position opposing the bumper from a side away from the traveling direction when the placement portion is placed on the traveling surface, the mounting portion includes an underlay portion that is positioned relative to the opposing portion such that the wheel is underlay when the bumper is in contact with the opposing portion, A driving restriction device in which the distance in the driving direction between the opposing surface of the opposing portion that faces the bumper and the tip of the underlay portion on the side closer to the driving direction is less than the distance between the end of the bumper on the side farther from the driving direction and the axis of the wheel.

2. 2. The driving restriction device according to claim 1, wherein the distance in the running direction between the opposing surface and the tip end of the underlay portion on the side closer to the running direction is set so that, when the underlay portion is not under the wheel and the tip end of the underlay portion on the side closer to the running direction is in contact with the outer peripheral surface of the wheel, the opposing surface and the bumper are in contact or face each other with a gap.

3. the opposing portion includes a fixed opposing member fixed to the placement portion, and a detachable opposing member that is disposed closer to the fixed opposing member in the traveling direction, is not fixed to the placement portion, and is attached so as to be detachable from the fixed opposing member, the detachable opposing member has an opposing surface that faces the bumper from a side away from the traveling direction, The travel restriction device according to claim 1 or 2, wherein the fixed opposing member has an auxiliary opposing surface that faces the bumper from a side away from the bumper in the travel direction when the detachable opposing member is detached.

4. When viewed from above, the direction perpendicular to the running direction is defined as the width direction, The travel restricting device according to claim 3 , wherein the width of the detachable opposing member is greater than the width of the traveling rail and the width of the fixed opposing member.

5. When viewed from above, the direction perpendicular to the running direction is defined as the width direction, the mounting portion includes a pair of guide portions disposed on both outer sides of the traveling rail in the width direction, The travel restriction device according to claim 1 or 2, wherein each of the pair of guide portions includes a guide surface facing a side surface of the travel rail.

6. 3. The travel restriction device according to claim 1, wherein the underlay portion comprises: a plate-shaped portion formed in a plate shape that conforms to the travel surface; and a tapered portion that is arranged on the approaching side of the travel direction relative to the plate-shaped portion and has an upper surface that slopes downward as it approaches the approaching side of the travel direction.

7. The facing portion is an inclined upper surface formed from an upper end of the opposing surface and inclined upward as it moves toward the away side in the traveling direction; an opposing upper surface formed so as to extend from an upper end of the inclined upper surface to a side away from the traveling direction, an end portion of the inclined upper surface on the approaching side in the traveling direction is disposed below a lower end portion of a wheel support member that supports the wheels of the transporting vehicle on the receding side in the traveling direction; an end of the inclined upper surface away from the traveling direction is disposed above the lower end of the wheel support member, The travel restriction device according to claim 1 or 2, wherein the upper surface of the opposing portion is configured to be able to support the lower end portion of the wheel support member from below.

8. The upper limit distance that the transport vehicle is allowed to travel is defined as an allowable travel distance, a reference mark indicating a reference for the installation position of the mounting portion relative to the bumper is provided on an upper surface of the mounting portion; The travel restriction device according to claim 1 or 2, wherein the reference mark is disposed at a position spaced apart from the opposing surface by the allowable travel distance.

Images