JP2020015561A - Article transport device - Google Patents

Abstract

To provide an article transport device which can inhibit foreign objects from mixing into a motor.SOLUTION: An article transport device 100 includes: a dolly 200 which travels along a predetermined track R; and a ground side facility 300 having a pair of traveling rails 310 defining the track R. The dolly 200 includes: a transfer mechanism 230 which transfers articles in a transfer space S disposed at a predetermined position in the track R; a first movable element 250 which is operated by magnetic action and drives the transfer mechanism 230; and a driving transmission mechanism 240 which supports the first movable element 250 and transmits driving force from the first movable element 250 to the transfer mechanism 230. The ground side facility 300 includes: a first stator 320 which provides magnetic action to the first movable element 250 of the dolly 200; and a shield plate 340 which covers an area which is a moving path R1, in which the first movable element 250 moves when the dolly 200 travels on the track R, and is not provided with at least the first stator 320.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an article transport apparatus that transports articles using a ground primary linear motor.

  2. Description of the Related Art Conventionally, there has been known an article transport apparatus in which a transport trolley having a transfer conveyor travels on a travel path with a thrust generated by a linear motor (for example, see Patent Document 1). The transport vehicle is provided with a mover for driving the transfer conveyor, and a predetermined position on the traveling path is provided with a stator for applying a magnetic effect to the mover of the transport table. . In other words, when the transport vehicle approaches or stops at a predetermined position on the traveling path, or decelerates, the mover on the transport vehicle side and the stator on the traveling path constitute a motor, and the transfer is performed by the magnetic action of the motor. The conveyor is driven.

Japanese Utility Model Publication No. 7-21452

  By the way, if foreign matter enters between the stator and the mover of the motor, the foreign matter may hinder the traveling of the transport vehicle.

  Therefore, the present invention has been made in view of such a problem, and provides an article transport apparatus capable of suppressing entry of foreign matter into a motor.

  In order to achieve the above object, an article transporting device according to an aspect of the present invention includes a bogie that travels along a predetermined traveling path, and a ground-side facility including a pair of traveling rails that define the traveling path. The trolley is a transfer mechanism for transferring articles in a transfer space arranged at a predetermined position on a traveling path, and a rod-shaped member extending in the traveling direction below the transfer mechanism, and operates by a magnetic action. A first mover that drives the transfer mechanism and a drive transmission mechanism that supports the first mover and transmits a driving force from the first mover to the transfer mechanism, between a pair of traveling rails. And a drive transmission mechanism penetrating through the space. The first stator provided at a position corresponding to the mounting space When the vehicle is traveling, a travel route which the first movable element is moved, and a shield plate covering the region not at least a first stator provided.

  According to this, since the shielding plate covers at least an area where the first stator is not provided on the movement path along which the first movable element moves, the first movable element moving in the area is shielded. Covered by boards. That is, the approach of the foreign matter to the moving first movable element is prevented by the shielding plate. This makes it possible to more reliably suppress the entry of foreign matter into the motor including the first stator and the first mover.

  Further, the shielding plate covers the first stator.

  According to this, since the shielding plate covers the first stator, entry of foreign matter into the first stator is blocked by the shielding plate. This makes it possible to more reliably suppress the entry of foreign matter into the motor including the first stator and the first mover.

  In addition, a plurality of first stators are provided discretely along the traveling path.

  According to this, even when the plurality of first stators are provided discretely along the traveling path, the openings of the first stators are arranged at the above-described positions. That is, the invasion of foreign matter from above can be blocked by each first stator itself. Therefore, it is possible to suppress foreign matter from entering the motor including the first stator and the first mover.

  Also, a plurality of trolleys are provided, and each of the plurality of trolleys is independently movable.

  According to this, since each of the plurality of trucks can independently travel on the travel path, the empty truck can be compared with the case where the entire travel path is covered by the plurality of connected trucks. Generation can be suppressed.

  Further, since each of the plurality of trucks can independently travel on the traveling path, a case where the interval is large before and after each truck occurs at any time. For this reason, a state in which a bogie does not exist above the first stator often occurs.However, as described above, the first stator itself blocks entry of foreign matter from above. Foreign matter can be suppressed from entering the motor including the first stator and the first mover.

  In addition, the ground-side equipment includes a second stator arranged along the travel path, and the bogie includes a second mover that operates by a magnetic action from the second stator to move the bogie along the travel path. Prepare.

  According to this, an article transport including a second stator arranged along the traveling path and a second movable element operated by magnetic action from the second stator to move the bogie along the traveling path. Even in the case of the device, it is possible to suppress the entry of foreign matter into the motor including the first stator and the first mover.

  ADVANTAGE OF THE INVENTION The article conveyance apparatus of this invention can suppress foreign material from mixing into a motor.

FIG. 1 is a perspective view for explaining the configuration of the article transport device according to the embodiment. FIG. 2 is a cross-sectional view of the article conveyance device according to the embodiment, which is cut in a vehicle width direction of the conveyance cart. FIG. 3 is a plan view schematically showing a schematic configuration of the ground-side facility according to the embodiment. FIG. 4 is a block diagram illustrating a functional configuration of the article transport device according to the embodiment. FIG. 5 is a plan view schematically illustrating a schematic configuration of the ground-side facility according to the first modification. FIG. 6 is a cross-sectional view of the article transporting device according to Modification 2 cut in the vehicle width direction of the transport trolley. FIG. 7 is a cross-sectional view of the article transporting device according to Modification 3 cut in the vehicle width direction of the transport trolley. FIG. 8 is a cross-sectional view of the article transporting device according to Modification 4 cut in the vehicle width direction of the transport trolley. FIG. 9 is a cross-sectional view of the article transport device according to Modification Example 5 cut in the vehicle width direction of the transport trolley.

  Hereinafter, an article conveying device according to an embodiment of the present invention will be described with reference to the drawings. Each drawing is a schematic diagram, and is not necessarily strictly illustrated.

  The embodiment described below shows a specific example of the present invention. Numerical values, shapes, materials, constituent elements, arrangement positions of constituent elements, connection forms, and the like shown in the following embodiments are merely examples, and do not limit the present invention. In addition, among the components in the following embodiments, components not described in the independent claims indicating the highest concept are described as arbitrary components.

[Constitution]
First, an outline of the article transport device 100 according to the embodiment will be described. FIG. 1 is a perspective view for explaining the configuration of the article transport device according to the embodiment. FIG. 2 is a schematic cross-sectional view of the article conveyance device according to the embodiment, which is cut in a vehicle width direction of the conveyance cart.

  As shown in FIGS. 1 and 2, the article transport device 100 includes a plurality of trolleys 200 traveling along a predetermined traveling path R, and a ground-side facility 300 having a pair of traveling rails 310 that define the traveling path R. And

  Each of the plurality of trolleys 200 is independently controlled by a ground primary linear motor system configured by a second stator 330 disposed on a predetermined traveling path R and a second movable element 260 of the trolley 200. It travels so that it can stop or accelerate.

  The cart 200 is a transport cart that travels along the travel path R by traveling on a pair of travel rails 310. The carriage 200 includes a carriage main body 220, a transfer mechanism 230, a drive transmission mechanism 240, a first movable element 250, a second movable element 260, and a detected part 270 (see FIG. 4).

  The bogie main body 220 is provided with a plurality of wheels 221 for traveling on a pair of traveling rails 310. The carriage main body 220 is provided with a transfer mechanism 230, a drive transmission mechanism 240, a first movable element 250, a second movable element 260, and a detected part 270.

  The transfer mechanism 230 receives a driving force from a motor 400 described later and transfers the articles in an intersecting direction (Y-axis direction) intersecting the traveling path R. In the present embodiment, the transfer mechanism 230 transfers the articles in the Y-axis direction. It does not have to be orthogonal. For example, the transfer direction by the transfer mechanism 230 may intersect the traveling path R at 45 degrees.

  The transfer mechanism 230 is, for example, a transfer belt conveyor, and is disposed above the carriage body 220. The transfer mechanism 230 includes an endless belt 231 and a pair of pulleys 232 around which the endless belt 231 is wound. The endless belt 231 rotates following the rotation of one pulley 232 of the pair of pulleys 232. Thereby, the article on the endless belt 231 advances in the transfer direction (Y-axis direction). That is, the transfer mechanism 230 transfers the article 10 from the outside in the Y-axis direction to the upper surface of the carriage 200 (that is, the upper surface of the endless belt 231) by driving the endless belt 231 in the Y-axis direction. The article 10 placed on the upper surface of the carriage 200 is transferred from the upper surface to the outside in the Y-axis direction. The transfer mechanism 230 is not limited to a belt conveyor, but may be a roller conveyor.

  The drive transmission mechanism 240 transmits a driving force from a motor 400 described later to the transfer mechanism 230. Specifically, the drive transmission mechanism 240 includes an endless belt 241 and a plurality of rollers 242 that rotatably support the endless belt 241. The plurality of rollers 242 are attached to a support member 227 provided on the carriage body 220. A part of the support member 227 protrudes downward with respect to the bogie main body 220. A part of the support member 227 has a shape capable of entering the first stator 320 provided on the ground-side facility 300 in the X-axis direction when the bogie 200 travels on the travel path R. A part of the support member 227 has a shape that does not interfere with the first stator 320.

  The endless belt 241 is wound around one pulley 232 of the transfer mechanism 230. When the endless belt 241 rotates by receiving a driving force from a motor 400 described later, the one pulley 232 also rotates, so that the endless belt 231 of the transfer mechanism 230 rotates. The endless belt 241 is, for example, a rubber belt. The endless belt 241 is not limited to a rubber belt, and may be a chain.

  The first mover 250 constitutes the motor 400 together with the first stator 320 provided in the ground-side facility 300. The first mover 250 operates by the magnetic action given from the first stator 320, and drives the transfer mechanism 230. Specifically, the first mover 250 is a rod-shaped member extending in the traveling direction below the transfer mechanism 230, and is rotatably held with respect to the tip of the support member 227. The first mover 250 has a columnar shape whose axis coincides with the axis of rotation, and in a direction in which a magnetic field is generated radially around the axis of rotation when viewed from the axis of rotation, a plurality of permanent magnets S poles and N stations are alternately arranged. The endless belt 241 of the drive transmission mechanism 240 is wound around the first mover 250. That is, when the first mover 250 is rotated by the magnetic action given from the first stator 320, the endless belt 231 of the transfer mechanism 230 is rotated via the endless belt 241 and one pulley 232.

  The second mover 260 is composed of, for example, a plurality of permanent magnets. The plurality of permanent magnets constituting second mover 260 are arranged side by side in the traveling direction of bogie 200. The second mover 260 is provided on the lower surface of the bogie main body 220, and has one end in the Y-axis direction open. The second mover 260 has a configuration in which a plurality of permanent magnets are arranged in two rows in the Z-axis direction with the opening interposed therebetween. In the opening of the second mover 260, a second stator 330 provided in the ground-side facility 300 is arranged. The plurality of permanent magnets in a row are arranged on the side facing the second stator 330 such that the north pole and the south pole are alternately oriented. The second mover 260 is not limited to the two rows of permanent magnets, but may be formed of one row of permanent magnets. Further, the second mover 260 may be configured by a plurality of rows of permanent magnets arranged in the traveling direction.

  The detected part 270 is, for example, a permanent magnet, and is a member to be detected by the position sensor 350. The detected part 270 may not be a permanent magnet, and may be the body of the bogie 200 itself when the position sensor 350 is a sensor using laser light, ultrasonic waves, or an image captured by a camera.

  Next, the ground-side facility 300 will be described. FIG. 3 is a plan view schematically illustrating a schematic configuration of the ground-side facility 300 according to the embodiment. In FIG. 3, the pair of running rails 310 are illustrated with dot hatching.

  As shown in FIGS. 1 to 3, the ground-side facility 300 includes a pair of traveling rails 310, a first stator 320, a second stator 330, a shielding plate 340, and a position sensor 350 (see FIG. 4). And In FIG. 1, illustration of the shielding plate 340 is omitted.

  The traveling rail 310 is a member arranged along a predetermined traveling path R. Specifically, the traveling path R is formed in an oval shape as shown in FIG. The traveling rail 310 is two members arranged in a direction orthogonal to the traveling path R and along the traveling path R, and is made of, for example, a metal such as aluminum or an aluminum alloy. Note that the traveling rail 310 may be made of resin. In this embodiment, as shown in FIGS. 1 and 3, the traveling rail 310 intersects with the transport path 810 of the transport device 800 that transports the article 10 and transfers the article 10 to and from the transport apparatus 800. The transfer space S is included. In the present embodiment, three transport paths 810 are provided for one travel path R. For this reason, three transfer spaces S are also arranged for one traveling path R, and these are arranged discretely along the traveling path R. The number of transfer paths 810 may be other than three, and the transfer space S is also a number corresponding to the number of transfer paths 810 installed. That is, it is sufficient that at least one transfer space S is provided for one travel path R.

  The first stator 320 is a stator for applying a magnetic effect to the first mover 250 of the carriage 200 that has stopped or decelerated and entered the transfer space S to operate the first mover 250. is there. A plurality of first stators 320 are discretely provided along the traveling path R. Specifically, each of the plurality of first stators 320 is arranged at a position corresponding to the transfer space S.

  The first stator 320 is arranged at a position surrounding the area of the substantially cylindrical area through which the first mover 250 provided on the carriage 200 passes when the carriage 200 travels. Specifically, the first stator 320 is formed in a substantially cylindrical shape that penetrates in the X-axis direction, and has an opening 321 that is partially opened on the peripheral wall. The opening 321 is continuous throughout the first stator 320 in the X-axis direction. Thereby, the first stator 320 is formed in a substantially C shape when viewed in the X-axis direction. The first stator 320 is constituted by a plurality of coils arranged in a circumferential direction of a substantially columnar region.

  The first stator 320 has a shape surrounding a range of about 270 degrees around the traveling direction (X-axis direction) of the bogie 200. In other words, the first stator 320 has a shape in which some side surfaces corresponding to a range of about 90 degrees are removed from the cylindrical side surfaces. The first stator 320 is arranged such that the removed cylindrical shape faces the plus side in the Y-axis direction. Thus, the opening 321 is arranged at a position where the inside of the first stator 320 cannot be seen from the opening 321 when the first stator 320 is viewed from above. Here, the top view refers to viewing the first stator 320 from the plus side in the Z-axis direction.

  The drive transmission mechanism 240 and the support member 227 of the bogie 200 that have stopped or decelerated and entered the transfer space S penetrate through the opening 321. In this state, the first mover 250 supported by the support member 227 is disposed inside the first stator 320.

  The second stator 330 is arranged along the traveling path R within the opening of the second mover 260. Specifically, the second stator 330 is composed of a board extending in the horizontal direction along the traveling path R, and a plurality of coils arranged in the extending direction of the board. That is, the plurality of coils substantially function as the second stator 330. The plurality of coils constituting the second stator 330 are individually controlled by the controller 500 (see FIG. 4), so that each generates a magnetic field independently. As described above, the plurality of coils constituting the second stator 330 are individually controlled by the controller 500, so that a magnetic action is applied to the second movable element 260 of the carriage 200 to apply a force in the X-axis direction. I do. Thereby, the bogie 200 runs on the running rail 310.

  The shield plate 340 covers, from above, a moving path R1 along which the first mover 250 moves when the carriage 200 travels on the running path R. In FIG. 3, the movement path R1 of the first mover 250 is shown by a broken line. As shown in FIG. 3, the shielding plate 340 is provided continuously with respect to the entire movement route R1. The shielding plate 340 prevents the foreign matter from interfering with the first mover 250 by blocking further falling even if the foreign matter falls on the movement route R1.

  Specifically, as shown in FIG. 2, the shielding plate 340 includes a first portion 341 and a second portion 342. The first portion 341 and the second portion 342 are each formed of a metal such as iron, for example.

  The first part 341 is a part that covers the upper part of the movement route R1. The first portion 341 covers the upper part of the first stator 320 at a location corresponding to the transfer space S. The first part 341 includes a wall part 343 and a ceiling part 344. The wall portion 343 is disposed on the side opposite to the opening 321 side of the first stator 320, and covers the movement route R1 and the side of the first stator 320. The ceiling portion 344 is a portion extending in the horizontal direction from the upper portion of the wall portion 343, and covers the movement path R1 and the upper part of the first stator 320. The tip of the ceiling portion 344 hangs downward so as not to interfere with the drive transmission mechanism 240 and the support member 227 of the carriage 200. Thus, at least a part of the opening 321 of the first stator 320 is exposed from the tip of the ceiling 344.

  The second portion 342 is arranged on the opening 321 side of the first stator 320. The second portion 342 stands upright so as not to interfere with the drive transmission mechanism 240 and the support member 227 of the carriage 200. Thereby, at least a part of the opening 321 of the first stator 320 is exposed from the second portion 342.

  The base end of the second portion 342 is located at a position farther from the first stator 320 than the tip of the ceiling 344 in the Y-axis direction. The upper end of the second portion 342 is bent toward the first stator 320 side. Specifically, the upper end of the second part 342 is inclined at an angle of 90 degrees or more and less than 180 degrees with respect to the base end of the second part 342. The upper end of the second portion 342 overlaps the extension L1 of the tip of the ceiling 344. Since the second portion 342 has such a configuration, even if the foreign matter falls and passes near the ceiling 344, the foreign matter is repelled by the upper end of the second portion 342 to the outside of the shielding plate 340. That is, the structure is such that foreign matter is unlikely to enter the shielding plate 340, so that foreign matter is less likely to interfere with the first stator 320 and the first movable element 250.

  The position sensor 350 is a sensor for detecting the position of each carriage 200. The position sensor 350 is, for example, a magnetic sensor, and detects the position of a permanent magnet serving as the detection target 270 provided on each of the carts 200. The position sensor 350 does not have to be a magnetic sensor, and may be a sensor using laser light, ultrasonic waves, or the like, or may be a sensor using an image captured by a camera.

  The position sensor 350 is arranged along the traveling path R. Specifically, the position sensor 350 is disposed over a section where the second stator 330 is disposed. Thereby, according to the position of each carriage 200 detected by the position sensor 350, the article transporting apparatus 100 controls the second stator 330 corresponding to the position, thereby controlling the traveling operation of each carriage 200. Can be controlled.

  FIG. 4 is a block diagram illustrating a functional configuration of the article transport device according to the embodiment.

  The article transport device 100 includes a controller 500, a first stator 320, a second stator 330, a position sensor 350, and a plurality of carts 200.

  Since the first stator 320, the second stator 330, the position sensor 350, and the plurality of trolleys 200 have been described above, description thereof will be omitted. That is, here, only the controller 500 will be described. Although only one bogie 200 is shown in FIG. 3, the other bogies 200 function similarly.

  The controller 500 controls the operation of the ground primary linear motor system including the second stator 330 and the second mover 260 of the carriage 200. The controller 500 controls the second stator 330, for example, so that each of the plurality of trolleys 200 stops or decelerates into the transfer space S and enters the transfer space S. In this state, the controller 500 controls the first stator 320 to transfer the article to and from the transport device 800 via the transfer mechanism 230.

  Further, the controller 500 may control the second stator 330 to cause the plurality of bogies 200 to run in synchronization.

  The controller 500 includes, for example, a processor that executes a predetermined program, a memory that stores the predetermined program, and the like. Further, the controller 500 may be configured by a dedicated circuit.

[Effects, etc.]
As described above, the article transport device 100 according to the present embodiment includes the bogie 200 traveling along the predetermined traveling path R, the ground-side facility 300 having the pair of traveling rails 310 that define the traveling path R, It has. The carriage 200 is a transfer mechanism 230 that transfers articles in a transfer space S disposed at a predetermined position on the traveling path R, and a rod-shaped member that extends in the traveling direction below the transfer mechanism 230, A first mover 250 that operates by a magnetic action to drive the transfer mechanism 230; and a drive transmission mechanism 240 that supports the first mover 250 and transmits a driving force from the first mover 250 to the transfer mechanism 230. And a drive transmission mechanism 240 that penetrates a space between the pair of traveling rails 310. The ground-side facility 300 applies a magnetic action to the first mover 250 of the bogie 200 located in the transfer space S to operate the first mover 250, so that the ground-side facility 300 moves to a position corresponding to the transfer space S. A first stator 320 is provided, and a shield plate 340 that covers the entire movement path R1 along which the first movable element 250 moves when the carriage 200 travels on the traveling path R from above.

  According to this, since the shielding plate 340 covers at least a region where the first stator 320 is not provided on the moving route R1 in which the first movable element 250 moves, the first moving member R moving in the region is not covered. The mover 250 is covered by the shielding plate 340. That is, the approach of the foreign object to the moving first movable element 250 is prevented by the shielding plate 340. Accordingly, it is possible to more reliably suppress the entry of foreign matter into the motor 400 including the first stator 320 and the first movable element 250.

  Further, the shielding plate 340 covers the first stator 320.

  According to this, since the shielding plate covers the first stator 320, the approach of the foreign matter to the first stator 320 is prevented by the shielding plate 340. Accordingly, it is possible to more reliably suppress the entry of foreign matter into the motor 400 including the first stator 320 and the first movable element 250.

  A plurality of first stators 320 are provided discretely along the traveling path R.

  According to this, even when the plurality of first stators 320 are provided discretely along the traveling path R, the openings 321 of each of the first stators 320 are arranged at the positions described above. That is, each first stator 320 itself can block invasion of foreign matter from above. Therefore, invasion of foreign matter into the motor 400 including the first stator 320 and the first movable element 250 can be suppressed.

  Also, a plurality of trolleys 200 are provided, and each of the plurality of trolleys 200 can independently travel.

  According to this, since each of the plurality of trolleys 200 can independently travel on the travel path R, compared to a case where the entirety of the travel path R is covered by the plurality of connected trolleys 200. Also, the occurrence of the empty trolley 200 can be suppressed.

  In addition, since each of the plurality of carts 200 can independently travel on the travel path R, there may be occasional intervals before and after each cart 200. For this reason, the state in which the bogie 200 does not exist above the first stator 320 often occurs. However, since the first stator 320 itself blocks entry of foreign matter from above as described above, In this case as well, it is possible to prevent foreign substances from entering the motor 400 including the first stator 320 and the first movable element 250.

  In addition, the ground-side facility 300 includes a second stator 330 disposed along the travel path R, and the bogie 200 operates by the magnetic action from the second stator 330 to move the bogie 200 along the travel path R. Mover 260 for traveling.

  According to this, the second stator 330 disposed along the travel path R, and the second movable element 260 that operates by the magnetic action from the second stator 330 and causes the carriage 200 to travel along the travel path R Even in the article transporting apparatus 100 provided with the above, it is possible to suppress entry of foreign matter into the motor 400 including the first stator 320 and the first movable element 250.

  In addition, the ground-side facility 300 includes a shielding plate 340 that covers the entire movement path R1 along which the first mover 250 moves when the carriage 200 travels on the traveling path R from above.

  According to this, since the shield plate 340 covers the entire movement path R1 on which the first mover 250 moves, the first mover 250 moving on the movement path R1 is covered by the shield plate 340. That is, the approach of the foreign object to the moving first movable element 250 is prevented by the shielding plate 340. Accordingly, it is possible to more reliably suppress the entry of foreign matter into the motor 400 including the first stator 320 and the first movable element 250.

(Modification 1)
In the above-described embodiment, the case where the shielding plate 340 covers the entire movement path of the first movable element 250 from above is illustrated. However, the shielding plate 340A only needs to cover at least an area where the first stator 320 is not provided in the movement path of the first movable element 250.

  Hereinafter, Modification 1 will be described in detail. In the following description, the same portions as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof may be omitted.

  FIG. 5 is a plan view schematically illustrating a schematic configuration of the ground-side facility 300A according to the first modification. In FIG. 5, a pair of traveling rails 310 are illustrated with dot hatching.

  As shown in FIG. 5, the ground-side facility 300A according to the first modification includes a shielding plate 340A. The shielding plate 340A is divided into a plurality along the traveling path R, and the first stator 320 is exposed from the interval. Thus, the shielding plate 340A covers the entire area of the movement path R1 of the first movable element 250 where the first stator 320 is not provided from above.

  As described above, when the bogie 200 travels on the traveling path R, the ground-side facility 300 moves upward at least the region where the first stator 320 is not provided in the moving route R1 along which the first mover 250 moves. A shielding plate 340 is provided to cover from the front.

  According to this, since the shielding plate 340 covers at least a region where the first movable element 250 moves and which is not provided with the first stator 320, the shielding plate 340 covers the moving path R1. The first mover 250 is covered by the shielding plate 340. That is, the entry of foreign matter into the moving first movable element 250 is blocked by the shielding plate 340. Accordingly, it is possible to more reliably suppress the entry of foreign matter into the motor 400 including the first stator 320 and the first movable element 250.

  The shielding plate 340A may be a dummy first stator having no magnetic action.

(Modifications 2 and 3)
In the above embodiment, the case where the first stator 320 is arranged such that the opening 321 faces the plus side in the Y-axis direction has been exemplified. However, the orientation of the opening 321 may be any as long as the inside of the first stator 320 cannot be seen from the opening 321 when the first stator 320 is viewed from above.

  FIG. 6 is a cross-sectional view of the article transporting device according to Modification 2 cut in the vehicle width direction of the transport trolley. As shown in FIG. 6, in the second modification, the first stator 320a is arranged such that the opening 321a faces obliquely downward. Specifically, the opening 321a faces a direction inclined 45 degrees to the negative side in the Z-axis direction with respect to the Y-axis direction. Also in this case, the inside of the first stator 320a cannot be seen from the opening 321a when the first stator 320a is viewed from above.

  Note that, also in this case, a part of the support member 227a has a shape that does not interfere with the first stator 320a. Specifically, a part of the support member 227a hangs down to almost the same position as the lower end of the first stator 320a. Therefore, in the second modification, the second portion 342 of the shielding plate 340 is removed to prevent interference with the support member 227a.

  FIG. 7 is a cross-sectional view of the article transporting device according to Modification 3 cut in the vehicle width direction of the transport trolley. As shown in FIG. 7, in the third modification, the first stator 320b is arranged such that the direction of the opening 321b faces directly below. Specifically, the opening 321b faces the minus side in the Z-axis direction. Also in this case, when the first stator 320b is viewed from above, the inside of the first stator 320b cannot be seen from the opening 321b.

  Also in this case, a part of the provided support member 227b has a shape that does not interfere with the first stator 320b. Specifically, a part of the support member 227b hangs down to almost the same position as the lower end of the first stator 320b. Therefore, in the third modification, the second portion 342 of the shielding plate 340 is removed in order to prevent interference with the support member 227b.

(Modifications 4 and 5)
In the above embodiment, the case where the opening 321 is arranged at a position where the inside of the first stator 320 cannot be seen from the opening 321 when the first stator 320 is viewed from above is illustrated. In the modified examples 4 and 5, the openings 321c and 321d are arranged at positions where the inside of the first stators 320c and 320d can be seen from the openings 321c and 321d when the first stators 320c and 320d are viewed from above. An example is described below.

  FIG. 8 is a cross-sectional view of the article transporting device according to Modification 4 cut in the vehicle width direction of the transport trolley. As shown in FIG. 8, in the fourth modification, the first stator 320c is arranged such that the opening 321c faces obliquely upward. Specifically, the opening 321c faces a direction inclined 45 degrees to the plus side in the Z-axis direction with respect to the Y-axis direction. Also in this case, a part of the support member 227c has a shape that does not interfere with the first stator 320c.

  FIG. 9 is a cross-sectional view of the article transport device according to Modification Example 5 cut in the vehicle width direction of the transport trolley. As shown in FIG. 9, in the fifth modification, the first stator 320d is disposed such that the direction of the opening 321d is directly upward. Specifically, the opening 321d faces the plus side in the Z-axis direction. The support member 227d does not hang down from the bogie main body 220.

  The shielding plate 340D covers the side and obliquely above the movement route R1, but has an opening immediately above the movement route R1. The endless belt 241 passes through this opening. As described above, although the shielding plate 340D does not cover directly above the movement route R1, it covers the side or obliquely above the movement route R1, so that a certain foreign matter entry suppression effect can be obtained.

(Other)
As described above, the article transporting device according to one or more aspects of the present invention has been described based on the embodiment, but the present invention is not limited to this embodiment. Unless departing from the spirit of the present invention, various modifications conceivable to those skilled in the art may be applied to the present embodiment, and a form constructed by combining components in different embodiments may be one or more of the present invention. It may be included within the scope of the embodiment.

  For example, in the above-described embodiment, the case where the article transport device 100 includes the shielding plate 340 is illustrated, but the shielding plate 340 may not be provided. Even without the shielding plate 340, the opening 321 of the first stator 320 is arranged at a position where the inside of the first stator 320 cannot be seen from the opening 321 when the first stator 320 is viewed from above. Therefore, it is possible to block foreign matter from entering the opening 321 of the first stator 320 from above.

  Further, in the above-described embodiment, the running rail is configured as an endless path such as an oval or rectangular path, but is not limited to an annular path. , Θ-shaped paths may be formed. That is, the traveling rail may constitute a path having a partially annular path.

  INDUSTRIAL APPLICABILITY The present invention is useful as an article transport device or the like that can fully utilize a route on which a transport cart travels as a route for transporting articles.

DESCRIPTION OF SYMBOLS 10 Article 100 Article conveyance apparatus 200 Cart 220 Cart body 221 Wheel 227, 227a, 227b, 227c, 227d Supporting member 230 Transfer mechanism 231, 241 Endless belt 232 Pulley 240 Drive transmission mechanism 242 Roller 250 First mover 260 Second movable Child 270 Detected part 310 Running rail 300, 300A Ground-side facility 320, 320a, 320b, 320c, 320d First stator 321, 321a, 321b, 321c, 321d Opening 330 Second stator 340, 340A, 340D Shield plate 341 First part 342 Second part 343 Wall part 344 Ceiling part 350 Position sensor 400 Motor 500 Controller 800 Transport device 810 Transport path L1 Extension line R Travel path R1 Moving path S Transfer space

Claims (5)

A truck traveling along a predetermined traveling path,
Ground-side equipment comprising a pair of traveling rails defining the traveling path,
The cart is
A transfer mechanism for transferring articles in a transfer space arranged at a predetermined position on the traveling path,
A first movable element that is a rod-shaped member that extends in the traveling direction below the transfer mechanism and that operates by a magnetic action to drive the transfer mechanism;
A drive transmission mechanism that supports the first mover and transmits a driving force from the first mover to the transfer mechanism, wherein the drive transmission mechanism penetrates a space between the pair of traveling rails, With
The ground-side equipment includes:
A first stator provided at a position corresponding to the transfer space for applying a magnetic action to the first mover of the bogie located in the transfer space to operate the first mover; When,
An article transport device comprising: a shielding plate that covers at least an area where the first stator is not provided, which is a moving path along which the first mover moves when the bogie travels on the traveling path. The article conveying device according to claim 1, wherein the shielding plate covers the first stator. The article transport device according to claim 1, wherein a plurality of the first stators are discretely provided along the traveling path. A plurality of the carts are provided,
The article transport device according to any one of claims 1 to 3, wherein each of the plurality of carts is independently movable. The ground-side equipment, a second stator disposed along the traveling path,
The article transport device according to any one of claims 1 to 4, wherein the cart includes a second movable element that operates by a magnetic action from the second stator to cause the cart to travel along the travel path. .

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