Conveyor device and sorting conveyor device

Abstract

A conveyor device (1) is provided with: a first drive pulley (5) that grips a first shaft section (20) provided in the center of a first travel wheel (19A) provided in a conveyance trolley (18) circulating in a first conveyance path (3) and a second conveyance path (4), and that rotates so as to move the conveyance trolley (18) in an arc shape from the first conveyance path (3) to the second conveyance path (4), and a second drive pulley (6) that grips a second shaft section (20) provided in the center of the first travel wheel (19A) and rotates so as to move the conveyance trolley (18) in an arc shape from the first conveyance path (3) to the second conveyance path (4); a synchronous pulley (6) that grips a second traveling wheel (19B) provided to the conveyance carriage (18) and rotates synchronously with at least the first drive pulley (5) so that the conveyance carriage (18) moves in an arc shape from the first conveyance path (3) to the second conveyance path (4); and a second drive pulley (7) that grips a second shaft section (21) provided to the center of a third travel wheel (19C) provided to the transport carriage (18), and that rotates synchronously with at least the first drive pulley (5) so that the transport carriage (18) moves in an arc shape from the first transport path (3) to the second transport path (4).

Description

Technical Field

[0001] The present invention relates to a conveyor device for transporting goods using transport trolleys circulating in vertically arranged transport paths, and a sorting conveyor device for delivering goods loaded on multiple transport trolleys to a target delivery unit while circulating multiple transport trolleys in vertically arranged transport paths. Background Technology

[0002] Patent Document 1 discloses a technique for circulating multiple transport trolleys without reversing their direction within a loop-shaped transport path comprising two straight paths arranged vertically. On each of these transport trolleys, sorting belts are driven in a direction substantially perpendicular to the transport direction of the trolleys, and items are placed on the transport surfaces of these sorting belts for transport. Then, by moving the transport trolleys along the transport path while driving the sorting belts at predetermined positions along the transport path, the transported items are moved to the side of the transport path and sorted. Furthermore, in this sorting conveyor device, a pair of sprockets are provided at both ends (head and tail). A pair of annular drive timing belts are wound around these sprockets on both sides, forming a loop-shaped transport path. In this technology, when the transport trolley moves from the outgoing path (a straight path located on the upper level) to the return path (a straight path located on the lower level), the shafts of the guide roller (first guide roller) located at the front end in the direction of movement of the transport trolley and the shafts of the guide roller (second guide roller) located at the rear end diagonally opposite the first guide roller in the direction of movement of the transport trolley are respectively supported by different drive timing belts. Furthermore, the guide roller (third guide roller) located at the end of the transport trolley on the same side as the second guide roller on the front end is guided by a guide rail.

[0003] Furthermore, when the transport trolley moves from the loop to the destination, the shaft portions of the first guide roller and the second guide roller are supported by the drive timing belt, and the guide roller (the fourth guide roller) located at the end of the transport trolley on the same side as the first guide roller is guided by the guide rail.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2021-148201 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, when a transport trolley equipped with four guide rollers (hereinafter referred to as traveling wheels) moves from the outgoing path to the return path, or when the transport trolley moves from the return path to the outgoing path—that is, when the transport trolley deviates from a straight path supported by two traveling wheels on each side and moves vertically—the traveling wheels on the guide rails travel on the guide rails without being fixed to the drive timing belt. Furthermore, the two annular drive timing belts reverse direction in the outgoing and return paths via two sprockets wrapped around the head and tail ends. However, to prevent the transport trolley from reversing vertically in the outgoing and return paths, the central axes of the sprockets on each drive timing belt side are offset by the horizontal distance between the first and second guide rollers. In this case, the number of traveling wheels fixed to the drive timing belt is two diagonally opposite traveling wheels with axles on the transport trolley out of the four traveling wheels, and the transport trolley is supported by only two points. As a result, the transport trolley becomes unstable, especially when it is in the middle of its movement from the outward path to the return path, i.e., when it is moving vertically downwards. Although the central axes of the first and second guide rollers, which are diagonally opposite each other, do not wobble in the direction of travel of the driving timing belt, the third guide roller may move significantly up and down the guide rail due to the gap between it and the rail. Therefore, the degree of instability of the transport trolley due to its significant tilt increases. When the transport trolley becomes unstable, the items placed on it may fall off.

[0009] One object of the present invention is to provide a technology that relates to a conveyor device for transporting goods using a transport trolley circulating in a vertically arranged transport path, and a sorting conveyor device for delivering the goods placed on the transport trolley to a target delivery unit, which can improve the stability of the transport trolley at least when the transport trolley moves in the vertical direction.

[0010] Methods for solving problems

[0011] A first aspect of the present invention relates to a conveyor device. The conveyor device includes: a first transport path disposed on an upper layer; and a second transport path disposed on a lower layer of the first transport path, moving in a direction opposite to the movement direction of the first transport path. Furthermore, the conveyor device includes a first drive pulley disposed at a first end in the longitudinal direction of both the first and second transport paths and on one side in a direction perpendicular to the longitudinal direction of both transport paths. The first drive pulley has a first gear shape capable of being inserted into and wound around a first toothed belt. The first shaft is disposed at the center of a first travel wheel, one of two travel wheels, corresponding to the front of the movement direction of the first transport path. These two travel wheels are disposed on one side of a transport trolley circulating in the first and second transport paths. The first drive pulley rotates in such a manner that the transport trolley moves in an arc from the first transport path to the second transport path. In addition, the conveyor device has a synchronous pulley, which is disposed on one side and offset by a predetermined amount from the center side of the first drive pulley in the length direction of the first and second transport paths. The synchronous pulley has a second gear shape that can be engaged with the shape of the second travel wheel, which is one of the two travel wheels disposed on one side of the transport trolley and corresponds to the rear of the movement direction of the first transport path. The synchronous pulley rotates at least synchronously with the first drive pulley so that the transport trolley moves in an arc from the first transport path to the second transport path. In addition, the conveyor device has a second drive pulley, which is located on the other side of the direction perpendicular to the length direction of the first and second transport paths and is positioned in the same direction as the synchronous pulley. The second drive pulley has a first gear shape that allows the second shaft portion to be inserted and wound around the second toothed belt. The second shaft portion is located at the center of the third travel wheel, which is diagonally opposite to the first travel wheel, among two travel wheels located on the other side of the transport trolley. The second drive pulley rotates at least synchronously with the first drive pulley so that the transport trolley moves in an arc shape from the first transport path to the second transport path.

[0012] A second aspect of the invention relates to a conveyor device that, based on the first aspect, further has the following features: A specified amount is the distance away from the center of the first drive pulley. A specified distance is the distance from the center of the first traveling pulley to the center of the second traveling pulley.

[0013] A third aspect of the present invention relates to a conveyor device that, in addition to the features of the first aspect, has the following characteristics: In the second gear shape, the length obtained by subtracting the length of the pitch circle diameter of the synchronous pulley from the length of the root circle diameter of the synchronous pulley is greater than or equal to the radius of the second traveling wheel of the transport trolley.

[0014] A fourth aspect of the present invention relates to a conveyor device that, based on the first aspect, further comprises: a first drive sprocket that rotates by a drive motor; a first driven sprocket that, together with the first drive sprocket, is wound around a first synchronous belt and rotates in conjunction with the first drive sprocket; a second driven sprocket that, together with the first drive sprocket, is wound around a second synchronous belt and rotates in conjunction with the first drive sprocket; a second drive sprocket that rotates by a drive motor or another drive motor driven synchronously with the drive motor; and a third driven sprocket that, together with the second drive sprocket, is wound around a third synchronous belt and rotates in conjunction with the second drive sprocket. A first drive pulley rotates in conjunction with the first driven sprocket. Additionally, a synchronous pulley rotates in conjunction with the second driven sprocket. Furthermore, the second drive pulley rotates in conjunction with the third driven sprocket.

[0015] A fifth aspect of the invention relates to a conveyor device that, based on any one of the first to fourth aspects, further comprises the following features: The conveyor device further comprises a first guide rail disposed at a first end and on the other side, and the first guide rail guides a fourth travel wheel, one of two travel wheels disposed on the other side of the transport trolley and corresponding to the front of the direction of movement of the first transport path, in an arc shape from the first transport path to the second transport path.

[0016] A sixth aspect of the invention relates to a conveyor device that, in addition to the features of the fifth aspect, further comprises a first driven pulley disposed at a second end along the length of the first and second transport paths and on the other side. The first driven pulley has a first gear shape capable of being inserted into and wound around a second toothed belt by a second shaft portion. The first driven pulley rotates at least in conjunction with a second drive pulley, causing the transport trolley to move in an arc from the second transport path to the first transport path. In addition, the conveyor device also has a second driven pulley, which is disposed on one side and offset from the center of the first driven pulley in the length direction of the first and second transport paths by a predetermined amount. The second driven pulley has a first gear shape that allows the first shaft portion to be inserted and wound around the first toothed belt. The second driven pulley rotates at least in conjunction with the first drive pulley, causing the transport trolley to move in an arc shape from the second transport path to the first transport path. Furthermore, the conveyor device also has a second guide rail, which is disposed at the second end and on one side, and guides the second traveling wheel in an arc shape from the second transport path to the first transport path.

[0017] A seventh aspect of the invention relates to a conveyor device that, in addition to the features of the sixth aspect, further comprises a driven synchronous pulley disposed on the other side at the same position as the second driven pulley, and the driven synchronous pulley having a second gear shape into which the shape of a fourth traveling wheel can engage, and the driven synchronous pulley rotating in conjunction with at least the second driving pulley to cause the transport trolley to move in an arc from the second transport path to the first transport path.

[0018] An eighth aspect of the present invention relates to a sorting conveyor apparatus comprising: a conveyor device; an input conveyor device for inputting transported goods; and a delivery conveyor device for delivering transported goods. The conveyor device in the sorting conveyor apparatus comprises: a first transport path disposed on an upper layer; and a second transport path disposed on a lower layer of the first transport path, moving in a direction opposite to the moving direction of the first transport path. In addition, the conveyor device has a first drive pulley, which is located at the first end of the length direction of the first transport path and the second transport path and on one side in a direction that is horizontally perpendicular to the length direction of the first transport path and the second transport path. The first drive pulley has a first gear shape that allows a first shaft portion to be inserted and wound around a first toothed belt. The first shaft portion is located at the center of the first travel wheel, which is located in front of the first travel wheel in the direction of movement of the first transport path. The two travel wheels are located on one side of the transport trolley circulating in the first transport path and the second transport path. The first drive pulley rotates in such a way that the transport trolley moves in an arc from the first transport path to the second transport path. In addition, the conveyor device has a synchronous pulley, which is disposed on one side and offset from the center of the first drive pulley in the length direction of the first and second transport paths by a predetermined amount. The synchronous pulley has a second gear shape that can be engaged with the shape of the second travel wheel, which is one of the two travel wheels disposed on one side of the transport trolley and corresponds to the rear of the movement direction of the first transport path. The synchronous pulley rotates at least synchronously with the first drive pulley so that the transport trolley moves in an arc from the first transport path to the second transport path. In addition, the conveyor device has a second drive pulley, which is located on the other side of the direction that is horizontally perpendicular to the length direction of the first and second transport paths and is located at the same position as the synchronous pulley in the same horizontally perpendicular direction. The second drive pulley has a first gear shape that allows the second shaft portion to be inserted and wound around the second toothed belt. The second shaft portion is located at the center of the third travel wheel, which is diagonally opposite to the first travel wheel, among the two travel wheels located on the other side of the transport trolley. The second drive pulley rotates at least synchronously with the first drive pulley so that the transport trolley moves in an arc shape from the first transport path to the second transport path.

[0019] A ninth aspect of the invention relates to a sorting conveyor device that, in addition to the features of the eighth aspect, has the following characteristics: The transport trolley has a sorting belt that is wrapped around the portion carrying the transported items and is driven in a direction that is horizontally perpendicular to the transport direction of the transport trolley.

[0020] Invention Effects

[0021] According to the technology of the present invention, the stability of the transport trolley can be improved when the transport trolley moves in the vertical direction. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing a structural example of the conveyor device according to Embodiment 1.

[0023] Figure 2 This is an explanatory diagram showing a specific example of the conveyor device according to Embodiment 1.

[0024] Figure 3 This is an explanatory diagram showing a specific example of the conveyor device according to Embodiment 1.

[0025] Figure 4 This is an explanatory diagram showing an example of the configuration of the synchronous pulleys in the conveyor device of Embodiment 1.

[0026] Figure 5 This is an explanatory diagram showing a structural example of the synchronous pulley in the conveyor device of Embodiment 1.

[0027] Figure 6 This is an explanatory diagram showing a specific example of the structure of the synchronous pulley in the conveyor device of Embodiment 1.

[0028] Figure 7 This is a schematic diagram showing a structural example of the conveyor device according to Embodiment 2.

[0029] Figure 8 This is a schematic diagram showing a structural example of the conveyor device according to Embodiment 3. Detailed Implementation

[0030] The conveyor apparatus and sorting conveyor apparatus according to embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, common elements in all figures are labeled with the same reference numerals, and repeated descriptions are omitted.

[0031] 1. Implementation Method 1

[0032] 1-1. Example of the structure of a conveyor device

[0033] Figure 1 This is a schematic diagram showing a structural example of the conveyor device 1 according to Embodiment 1. Specifically, Figure 1 (A) is a top view of conveyor device 1. Figure 1(B) is a side view of conveyor assembly 1. More specifically, Figure 1 (B) is a right-side view of conveyor unit 1. Additionally, Figure 1 The dashed section shown in (A) represents the components that are not visible from the top surface. Figure 1 The dashed section shown in (B) represents components that are not visible from the right side. Based on this, the structural example of the conveyor device 1 will be described below.

[0034] The conveyor assembly 1 comprises a platform section, a mechanism section, and a transport section. The platform section includes a frame 2, multiple first support members 27A, and multiple second support members 27B. The frame 2 includes an upper frame 2A and a lower frame 2B. The first support members 27A are supports that hold the upper frame 2A and the lower frame 2B together, and are disposed between the upper frame 2A and the lower frame 2B. The second support members 27B are supports that hold the lower frame 2B and the ground (floor) together, and are disposed between the lower frame 2B and the ground (floor).

[0035] Furthermore, a first transport path 3 is provided in the upper frame 2A, and a second transport path 4 is provided in the lower frame 2B. The first transport path 3 is a transport path for the transport trolley 18 to travel in the upper frame. That is, the second transport path 4 is provided below the first transport path 3, and is a transport path for the transport trolley 18 to move in the opposite direction to the movement direction of the first transport path 3. In addition, a straight path is shown as an example of a transport path.

[0036] The mechanism is configured to include a drive unit and a driven unit. First, the drive unit will be described. The drive unit includes a first drive pulley 5, a synchronous pulley 6, and a second drive pulley 7. The first drive pulley 5 is located at the first end of the first transport path 3 and the second transport path 4 along their length, and on one side in a direction perpendicular to the length direction of the first transport path 3 and the second transport path 4. The first end refers to the end corresponding to the front of the first transport path 3 for which the transport trolley 18 travels. The first drive pulley 5 is a component with a rotating mechanism that holds the transport trolley 18 as it moves from the first transport path 3 to the second transport path 4. Furthermore, the first drive pulley 5 is also a component that drives the first toothed belt 22A wound around the first drive pulley 5 by rotating the first drive pulley 5.

[0037] Specifically, the first drive pulley 5 is connected to the first driven sprocket 10A and rotates in conjunction with the first driven sprocket 10A. The first driven sprocket 10A, serving as a power source for rotating the first drive pulley 5, is wound around the first synchronous belt 11A along with the first drive sprocket 9 and rotates in conjunction with the first drive sprocket 9. The first drive sprocket 9, serving as a power source for rotating the first driven sprocket 10A, is connected to a first drive motor (not shown) and rotates by being driven by the first drive motor.

[0038] Thus, driven by the first drive motor, the first drive sprocket 9 and the first driven sprocket 10A rotate together, thereby enabling the first drive pulley 5 to rotate. Furthermore, the first drive motor can be mounted inside or outside the first drive sprocket 9.

[0039] The synchronous pulley 6 is positioned on one side perpendicular to the length direction of the first transport path 3 and the second transport path 4, and is offset from the center of the first drive pulley 5 along the length direction of the first transport path 3 and the second transport path 4 by a predetermined amount. The predetermined amount refers to the distance from the center of the first drive pulley 5. Details regarding this predetermined distance will be explained later. Furthermore, the synchronous pulley 6 is a component with a rotating mechanism for holding the transport carriage 18 as it moves from the first transport path 3 to the second transport path 4.

[0040] Specifically, the synchronous pulley 6 is connected to the second driven sprocket 10B and rotates in conjunction with the second driven sprocket 10B. The second driven sprocket 10B, serving as a power source for rotating the synchronous pulley 6, is wound around the second synchronous belt 11B together with the first drive sprocket 9 and rotates in conjunction with the first drive sprocket 9. The first drive sprocket 9, serving as a power source for rotating the second driven sprocket 10B, is connected to the aforementioned first drive motor (not shown) and rotates by being driven by the first drive motor.

[0041] Thus, driven by the first drive motor, the first drive sprocket 9 and the second driven sprocket 10B rotate together, thereby enabling the synchronous belt pulley 6 to rotate.

[0042] The second drive pulley 7 is positioned on the opposite side of the length direction of the first transport path 3 and the second transport path 4, perpendicular to the horizontal direction, at the same position as the synchronous pulley 6. The second drive pulley 7 is a component with a rotating mechanism for holding the transport carriage 18 as it moves from the first transport path 3 to the second transport path 4. Furthermore, the second drive pulley 7 is also a component that drives the second toothed belt 22B wound around it by rotating the second drive pulley 7.

[0043] Furthermore, the second drive pulley 7 is connected to the third driven sprocket 13 and rotates in conjunction with the third driven sprocket 13. The third driven sprocket 13, serving as a power source for rotating the second drive pulley 7, is wound around the second drive sprocket 12 with a third synchronous belt 14 and rotates in conjunction with the second drive sprocket 12. The second drive sprocket 12, serving as a power source for rotating the third driven sprocket 13, is connected to a second drive motor (not shown) and rotates by being driven by the second drive motor.

[0044] Therefore, the second drive sprocket 12 and the third driven sprocket 13 are driven together by the second drive motor, thereby rotating the second drive pulley 7. Furthermore, the second drive motor can be mounted inside or outside the second drive sprocket 12. When the second drive motor is mounted outside the second drive sprocket 12, the second drive motor can be the first drive motor described above, or it can be a different motor. When the second drive motor is mounted outside the second drive sprocket 12 and is a different motor from the first drive motor, a motor that drives synchronously with the first drive motor is used as the second drive motor.

[0045] Next, the driven part included in the mechanism will be described. The driven part includes a first driven pulley 15 and a second driven pulley 16. The first driven pulley 15 is disposed at the second end in the length direction of the first transport path 3 and the second transport path 4, and is disposed on the opposite side in a direction that is perpendicular to the length direction of the first transport path 3 and the second transport path 4. The second end refers to the end corresponding to the rear of the first transport path 3 for the transport trolley 18 to travel. That is, the second end is the end located on the opposite side of the first end. In addition, the first driven pulley 15 is a component with a rotating mechanism for holding the transport trolley 18 when it moves from the second transport path 4 to the first transport path 3. Furthermore, the first driven pulley 15 is also a component that rotates the second toothed belt 22B wrapped around the first driven pulley 15 by rotating the first driven pulley 15.

[0046] Specifically, the first driven pulley 15 and the second drive pulley 7 are together wound around the second toothed belt 22B, and rotate in conjunction with the second drive pulley 7. Thus, the second drive pulley 15 can be rotated by the drive rotation of the second drive pulley 7, and the second toothed belt 22B wound around the second drive pulley 7 operates in conjunction with the drive rotation of the second drive pulley 7.

[0047] The second driven pulley 16 is located on one side in a direction perpendicular to the length direction of the first transport path 3 and the second transport path 4, and is offset from the center of the first transport path 3 and the second transport path 4 by a predetermined amount relative to the first driven pulley 15. The predetermined amount refers to the distance from the center of the first driven pulley 15. Details regarding the predetermined distance will be explained later. Furthermore, the second driven pulley 16 is a component with a rotating mechanism for holding the transport carriage 18 when it moves from the second transport path 4 to the first transport path 3. In addition, the second driven pulley 16 is also a component that rotates the first toothed belt 22A wound around it.

[0048] Specifically, the second driven pulley 16 is wound around the first toothed belt 22A together with the first driving pulley 5, and rotates in conjunction with the first driving pulley 5. Thus, the first toothed belt 22A wound around the first driving pulley 5 rotates in conjunction with the driving rotation of the first driving pulley 5, thereby enabling the second driven pulley 16 to rotate.

[0049] Next, the transport unit included in the conveyor device 1 will be described. The transport unit includes multiple transport trolleys 18, a first upper travel track 23A, a second upper travel track 23B, a first lower travel track 23C, a second lower travel track 23D, a first guide rail 8, and a second guide rail 17. The first upper travel track 23A and the second upper travel track 23B are located on both sides in a direction perpendicular to the length direction of the first transport path 3. The first lower travel track 23C and the second lower travel track 23D are located on both sides in a direction perpendicular to the length direction of the second transport path 4. The transport trolleys 18 are moving bodies that circulate in the first transport path 3 and the second transport path 4 to transport the transported items 24 to the target location.

[0050] Furthermore, the transport trolley 18 has four traveling wheels. Specifically, the transport trolley 18 is configured such that, below the trolley frame supporting its sorting drive unit, it includes a first traveling wheel 19A located on one side of the transport trolley 18, a second traveling wheel 19B located on one side of the transport trolley 18, a third traveling wheel 19C located on the other side of the transport trolley 18 and diagonally opposite to the first traveling wheel 19A, and a fourth traveling wheel 19D located on the other side of the transport trolley 18 and diagonally opposite to the second traveling wheel 19B. Furthermore, one side of the transport trolley 18 refers to the side perpendicular to the length direction of the first transport path 3 and the second transport path 4. The other side of the transport trolley 18 refers to the side perpendicular to the length direction of the first transport path 3 and the second transport path 4.

[0051] Furthermore, when the transport trolley 18 travels on the first transport path 3, the first traveling wheel 19A and the second traveling wheel 19B travel on the first upper travel track 23A located on one side of the path, which is horizontally perpendicular to the length direction of the first transport path 3, while the third traveling wheel 19C and the fourth traveling wheel 19D travel on the second upper travel track 23B located on the other side of the path, which is horizontally perpendicular to the length direction of the first transport path 3. On the other hand, when the transport trolley 18 travels on the second transport path 4, the first traveling wheel 19A and the second traveling wheel 19B travel on the first lower travel track 23C located on one side of the path, which is horizontally perpendicular to the length direction of the second transport path 4, while the third traveling wheel 19C and the fourth traveling wheel 19D travel on the second lower travel track 23D located on the other side of the path, which is horizontally perpendicular to the length direction of the second transport path 4.

[0052] Furthermore, the transport trolley 18 has a first axle 20 at the center of the first traveling wheel 19A and a second axle 21 at the center of the third traveling wheel 19C. The transport trolley 18 travels by inserting the first axle 20 into the first toothed belt 22A, which is located between the outermost frame of the frame 2 and the first upper traveling track 23A, and between the outermost frame of the frame 2 and the first lower traveling track 23C. It also travels by inserting the second axle 21 into the second toothed belt 22B, which is located between the outermost frame of the frame 2 and the second upper traveling track 23B, and between the outermost frame of the frame 2 and the second lower traveling track 23D. When the transport trolley 18 moves vertically downwards from the first transport path 3 to the second transport path 4, or when it moves upwards from the second transport path 4 to the first transport path 3, the transport trolley 18 is supported by the aforementioned mechanism holding at least the first axle 20 and the second axle 21. Details regarding the state of the transport trolley 18 when it is controlled by the mechanism department will be explained later.

[0053] The first guide rail 8 is disposed at the first end of the length direction of the first transport path 3 and the second transport path 4, and on the other side in a direction that is perpendicular to the length direction of the first transport path 3 and the second transport path 4. The first guide rail 8 has a structure that can guide the fourth travel wheel 19D of the transport trolley 18 from the first transport path 3 to the second transport path 4 in an arc shape.

[0054] The second guide rail 17 is disposed at the second end of the length direction of the first transport path 3 and the second transport path 4 and is disposed on one side in a direction that is perpendicular to the length direction of the first transport path 3 and the second transport path 4. The second guide rail 17 has a structure that can guide the second traveling wheel 19B of the transport trolley 18 from the second transport path 4 to the first transport path 3 in an arc shape.

[0055] 1-2. Specific examples

[0056] 1-2-1. The first case where the transport trolley was controlled by the mechanism department.

[0057] Figure 2 This is an explanatory diagram showing a specific example of the conveyor device 1 according to Embodiment 1. Specifically, Figure 2 This diagram shows an example of the transport carriage 18 being held by the mechanism when it moves vertically downwards. Figure 2 (A) is a top view showing the state of the transport trolley 18 before it moves from the first transport path 3 to the second transport path 4. Figure 2 (B) is with Figure 2 The side view corresponding to (A). Additionally, Figure 2 (C) is a top view showing the state of the transport trolley 18 as it moves from the first transport path 3 to the second transport path 4. Figure 2 (D) is with Figure 2 The side view corresponding to (C). And, Figure 2 (E) is a top view showing the state of the transport trolley 18 after it has moved from the first transport path 3 to the second transport path 4. Figure 2 (F) is with Figure 2 The side view corresponding to (E). The details of each case will be explained below.

[0058] exist Figure 2 (A) and Figure 2 In the example shown in (B), the first shaft portion 20 of the first traveling wheel 19A is held by the first drive pulley 5, the second traveling wheel 19B is held by the timing pulley 6, and the second shaft portion 21 of the third traveling wheel 19C is held by the second drive pulley 7. Therefore, the first shaft portion 20 moves with the rotation of the first drive pulley 5, the second traveling wheel 19B moves with the rotation of the timing pulley 6, and the second shaft portion 21 of the third traveling wheel 19C moves with the second drive pulley 7. On the other hand, the fourth traveling wheel 19D is not held by any structure of the mechanism. That is, before the transport trolley 18 moves from the first transport path 3 to the second transport path 4, the transport trolley 18 is supported by at least three points: the first shaft portion 20, the second traveling wheel 19B, and the second shaft portion 21.

[0059] exist Figure 2 (C) and Figure 2In the example shown in (D), the positions of all the traveling wheels on the transport trolley 18 are shown to be reversed towards the mechanism section. In this case, the first shaft 20 is held by the first drive pulley 5 and moves as the first drive pulley 5 rotates. The second traveling wheel 19B is held by the timing pulley 6 and moves as the timing pulley 6 rotates. The second shaft 21 is held by the second drive pulley 7 and moves as the second drive pulley 7 rotates. More specifically, the first shaft 20 is held between the first drive pulley 5 and the first toothed belt 22A, and the second shaft 21 is held between the second drive pulley 7 and the second toothed belt 22B.

[0060] On the other hand, the fourth traveling wheel 19D is not held by any structure of the mechanism, but travels on the travel track (not shown) provided on the first guide rail 8. However, the fourth traveling wheel 19D, guided by the first guide rail 8, moves together with the second traveling wheel 19B, the first axle 20, and the second axle 21 held by the mechanism, and therefore does not move in contact with the travel track provided on the first guide rail 8. Therefore, when the transport trolley 18 moves from the first transport path 3 to the second transport path 4, the transport trolley 18 is supported by three points: the second traveling wheel 19B, the first axle 20 provided on the first traveling wheel 19A, and the second axle 21 provided on the third traveling wheel 19C.

[0061] exist Figure 2 (E) and Figure 2 In the example shown in (F), the position of all the traveling wheels of the transport carriage 18 changes from the mechanism section to the second transport path 4. In this case, the first traveling wheel 19A and the second traveling wheel 19B are each located on the first lower travel track 23C, and the third traveling wheel 19C and the fourth traveling wheel 19D are each located on the second lower travel track 23D. Therefore, when the transport carriage 18 moves from the first transport path 3 to the second transport path 4, the transport carriage 18 is supported by four points: the first traveling wheel 19A, the second traveling wheel 19B, the third traveling wheel 19C, and the fourth traveling wheel 19D. In addition, the first axle 20 is held by the first toothed belt 22A, and the second axle 21 is held by the second toothed belt 22B. In this state, the transport carriage 18 travels on the second transport path 4.

[0062] Thus, according to the conveyor device 1 of Embodiment 1, when the transport trolley 18 moves from the first transport path 3 to the second transport path 4, the first shaft portion 20 of the first traveling wheel 19A is embedded in the first drive pulley 5, the second traveling wheel 19B is embedded in the synchronous pulley 6, and the second shaft portion 21 of the third traveling wheel 19C is embedded in the second drive pulley 7. Furthermore, the conveyor device 1 rotates the first drive pulley 5, the synchronous pulley 6, and the second drive pulley 7 synchronously, so that the transport trolley 18 moves in an arc shape from the first transport path 3 to the second transport path 4. Therefore, when the transport trolley 18 moves in the vertical direction, the transport trolley 18 is supported by at least three points. Thus, the stability of the transport trolley 18 can be improved.

[0063] 1-2-2. The second case where the transport trolley is controlled by the mechanism department.

[0064] Figure 3 This is an explanatory diagram showing a specific example of the conveyor device 1 according to Embodiment 1. Specifically, Figure 3 This diagram shows an example of the transport carriage 18 being held by the mechanism when the transport carriage 18 moves in the upward direction. Figure 3 (A) is a top view showing the state of the transport trolley 18 before it moves from the second transport path 4 to the first transport path 3. Figure 3 (B) is with Figure 3 The side view corresponding to (A). Additionally, Figure 3 (C) is a top view showing the state of the transport trolley 18 as it moves from the second transport path 4 to the first transport path 3. Figure 3 (D) is with Figure 3 The side view corresponding to (C). And, Figure 3 (E) is a top view showing the state of the transport trolley 18 after it has moved from the second transport path 4 to the first transport path 3. Figure 3 (F) is with Figure 3 The side view corresponding to (E). The details of each case will be explained below.

[0065] exist Figure 3 (A) and Figure 3In the example shown in (B), the position of all the traveling wheels of the transport trolley 18 traveling on the second transport path 4 is shown before the mechanism is changed. In this case, the first traveling wheel 19A and the second traveling wheel 19B are each located on the first lower travel track 23C, and the third traveling wheel 19C and the fourth traveling wheel 19D are each located on the second lower travel track 23D. Therefore, before the transport trolley 18 moves from the second transport path 4 to the first transport path 3, the transport trolley 18 is supported by four points: the first traveling wheel 19A, the second traveling wheel 19B, the third traveling wheel 19C, and the fourth traveling wheel 19D. In addition, the first shaft 20 is held by the first toothed belt 22A, and the second shaft 21 is held by the second toothed belt 22B.

[0066] exist Figure 3 (C) and Figure 3 In the example shown in (D), the positions of all the traveling wheels on the transport trolley 18 are shown to be changed towards the mechanism section. In this case, the second shaft portion 21 provided on the third traveling wheel 19C is held by the first driven pulley 15 and moves as the first driven pulley 15 rotates. The first shaft portion 20 provided on the first traveling wheel 19A is held by the second driven pulley 16 and moves as the second driven pulley 16 rotates. More specifically, the second shaft portion 21 is engaged and held between the first driven pulley 15 and the second toothed belt 22B, and the first shaft portion 20 is engaged and held between the second driven pulley 16 and the first toothed belt 22A.

[0067] On the other hand, the second traveling wheel 19B and the fourth traveling wheel 19D are not held by any structure of the mechanism. The second traveling wheel 19B travels on a travel track (not shown) provided on the second guide rail 17. However, since the second traveling wheel 19B, guided by the second guide rail 17, moves together with the first axle portion 20 and the second axle portion 21 held by the mechanism, it does not move while in contact with the travel track provided on the second guide rail 17. Therefore, when the transport trolley 18 moves from the second transport path 4 to the first transport path 3, the transport trolley 18 is supported by the second axle portion 21 provided on the third traveling wheel 19C and the first axle portion 20 provided on the first traveling wheel 19A.

[0068] exist Figure 3 (E) and Figure 3In the example shown in (F), the positions of the first traveling wheel 19A and the fourth traveling wheel 19D are shown transitioning from the mechanism section to the first transport path 3. In this case, the first traveling wheel 19A and the second traveling wheel 19B are each located on the first upper travel track 23A, and the third traveling wheel 19C and the fourth traveling wheel 19D are each located on the second upper travel track 23B. Therefore, when the transport trolley 18 moves from the second transport path 4 to the first transport path 3, the transport trolley 18 is supported by four points: the first traveling wheel 19A, the second traveling wheel 19B, the third traveling wheel 19C, and the fourth traveling wheel 19D. Furthermore, the first shaft 20 is held by the first toothed belt 22A, and the second shaft 21 is held by the second toothed belt 22B. In this state, the transport trolley 18 travels on the first transport path 3.

[0069] Thus, according to the conveyor device 1 of Embodiment 1, when the transport trolley 18 moves from the second transport path 4 to the first transport path 3, the second shaft portion 21 provided on the third traveling wheel 19C is engaged with the first driven pulley 15, and the first shaft portion 20 provided on the first traveling wheel 19A is engaged with the second driven pulley 16. Furthermore, in the conveyor device 1, the first driven pulley 15 rotates synchronously with the second drive pulley 7, and the second driven pulley 16 rotates synchronously with the first drive pulley 5, so that the transport trolley 18 moves in an arc shape from the second transport path 4 to the first transport path 3. Therefore, when the transport trolley 18 moves upward, the transport trolley 18 is supported by at least two points. Alternatively, the transport trolley 18 can also be supported by three points. Details of this method will be explained in Embodiment 2 shown below.

[0070] 1-2-3. Example of timing belt pulley configuration

[0071] Figure 4 This is an explanatory diagram showing an example of the arrangement of the timing pulley 6 in the conveyor device 1 of Embodiment 1. As described above, the timing pulley 6 is arranged offset from the center of the first drive pulley 5 in the longitudinal direction of the first transport path 3 and the second transport path 4 by a predetermined amount. The predetermined amount is a distance away from the center of the first drive pulley 5. Here, we consider the predetermined distance. When the transport trolley 18 moves in an arc from the first transport path 3 to the second transport path 4, it is required that the arrangement of the timing pulley 6 relative to the first drive pulley 5 of the transport trolley 18 be maintained in a manner that allows the posture of the transport trolley 18 to be maintained in parallel.

[0072] To achieve this, such as Figure 4 As shown, the distance D1 between the center of the first drive pulley 5 and the center of the synchronous pulley 6 needs to be the same as the distance D2 from the center of the first traveling wheel 19A of the transport trolley 18 to the center of the second traveling wheel 19B of the transport trolley 18. That is, the specified distance refers to distance D2.

[0073] Thus, according to the conveyor device 1 of Embodiment 1, the synchronous pulley 6 is positioned at a distance D2 away from the first drive pulley 5. Therefore, when the transport trolley 18 moves from the first transport path 3 to the second transport path 4, the transport trolley 18 can be moved while maintaining its parallel posture under three-point support. Therefore, the stability of the transport trolley 18 can be improved.

[0074] Furthermore, as described above, the second driven pulley 16 is also positioned offset from the first driven pulley 15 by a predetermined amount in the longitudinal direction of the first transport path 3 and the second transport path 4. This predetermined amount is a distance from the center of the first driven pulley 15 away from the center. In this case, the predetermined distance is also distance D2. Therefore, when the transport carriage 18 moves from the second transport path 4 to the first transport path 3, the transport carriage 18 can be moved while maintaining its parallel orientation.

[0075] 1-2-4. Example of the structure of a timing belt pulley

[0076] Consider the structure of the first drive pulley 5, the synchronous pulley 6, the second drive pulley 7, the first driven pulley 15, and the second driven pulley 16 included in the mechanism. Each of the mechanism components has a gear-shaped structure. The gears of the first drive pulley 5, the second drive pulley 7, the first driven pulley 15, and the second driven pulley 16 each have a first gear shape. On the other hand, the synchronous pulley 6 has a second gear shape, which differs from the first gear shape. The details of each of the first and second gear shapes will be explained below.

[0077] The first gear shape refers to the shape that allows the first shaft portion 20 and the second shaft portion 21 of the transport trolley 18 to be inserted into the gap between two adjacent teeth. On the other hand, the second gear shape refers to the shape that allows the outer shape of the traveling wheel of the transport trolley 18 to be engaged in the gap between two adjacent teeth. That is, the first gear shape has a structure that allows the first shaft portion 20 to be inserted and the first toothed belt 22A to be wound around it. Additionally, the first gear shape has a structure that allows the second shaft portion 21 to be inserted and the second toothed belt 22B to be wound around it. On the other hand, the second gear shape has a structure that allows the outer shapes of the first traveling wheel 19A, the second traveling wheel 19B, the third traveling wheel 19C, and the fourth traveling wheel 19D to be engaged.

[0078] Based on this, the structure of the second gear in the synchronous pulley 6 will be described in detail below.

[0079] Figure 5 This is an explanatory diagram showing a structural example of the synchronous pulley 6 in the conveyor device 1 of Embodiment 1. (As shown...) Figure 5 As shown in (A), the second traveling pulley 19B is embedded and held in the gap between two adjacent teeth in the synchronous pulley 6. However, this results in a structure where the toothed synchronous belt is not wound around the synchronous pulley 6. In this case, the following situation is envisioned.

[0080] For example, the second traveling wheel 19B, held by the timing pulley 6, is in a state from Figure 5 The state shown in (A) is towards Figure 5 (B) and Figure 5 When the states shown in (C) change sequentially, that is, when the position of the second traveling wheel 19B becomes lower than the reference line BL representing the center line of the transverse axis of the synchronous pulley 6, the second traveling wheel 19B, which is held by the synchronous pulley 6, will leave the synchronous pulley 6. In this case, the transport trolley 18 is supported only by the first shaft portion 20 and the second shaft portion 21.

[0081] However, when the transport trolley 18 moves from the first transport path 3 to the second transport path 4, the transport trolley 18 may become unstable when the position of the second travel wheel 19B is higher than the baseline BL. Therefore, when the second travel wheel 19B is held by the timing pulley 6 while its position is higher than the baseline BL, the stability of the transport trolley 18 can be maintained.

[0082] Furthermore, based on the shape of the second gear of the timing pulley 6, when the position of the second travel pulley 19B is lower than the reference line BL, the timing of the second travel pulley 19B being held by the timing pulley 6 leaving the timing pulley 6 can be delayed. Details regarding the shape of the second gear of the timing pulley 6 used to achieve this will be explained later.

[0083] Figure 6 This is an explanatory diagram showing a specific example of the structure of the synchronous pulley 6 in the conveyor device 1 of Embodiment 1. The shape of the second gear of the synchronous pulley 6 is configured such that the distance D5 obtained by subtracting the distance D3, which represents the length of the pitch circle diameter (PCD) of the synchronous pulley 6, from the distance D4, which represents the length of the root circle diameter of the synchronous pulley 6, is greater than or equal to the radius (distance D6) of the second traveling wheel 19B of the transport trolley 18.

[0084] Thus, in the conveyor device 1 of Embodiment 1, when the position of the second traveling wheel 19B is higher than the reference line BL, that is, when the transport trolley 18 is in an unstable state, the second traveling wheel 19B is held by the timing pulley 6. Furthermore, in the conveyor device 1 of Embodiment 1, when the position of the second traveling wheel 19B is lower than the reference line BL, that is, when the second traveling wheel 19B, held by the timing pulley 6, leaves the timing pulley 6, the time it takes for the second traveling wheel 19B to leave the timing pulley 6 becomes longer. Therefore, when the transport trolley 18 moves from the first transport path 3 to the second transport path 4, that is, when the transport trolley 18 moves in the vertical direction, the time the transport trolley 18 is supported by three points can be extended. Therefore, the stability of the transport trolley 18 can be further improved.

[0085] Furthermore, according to the conveyor device 1 of Embodiment 1, when the transport trolley 18 moves from the second transport path 4 to the first transport path 3, the first driven pulley 15 rotates synchronously with the second drive pulley 7, so that the transport trolley 18 moves in an arc shape from the second transport path 4 to the first transport path 3. Additionally, the second driven pulley 16 rotates synchronously with the first drive pulley 5. In this case, it is supported by the first shaft portion 20 and the second shaft portion 21 of the transport trolley 18.

[0086] 2. Implementation Method 2

[0087] Figure 7 This is a schematic diagram showing a structural example of the conveyor device 1A according to Embodiment 2. Figure 7 As shown, the conveyor device 1 also includes a driven synchronous pulley 40 in the driven part of the mechanism section. The driven synchronous pulley 40 is located on the opposite side of the direction perpendicular to the length direction of the first transport path 3 and the second transport path 4, and is positioned offset from the center of the first driven pulley 15 in the length direction of the first transport path 3 and the second transport path 4 by a predetermined amount. The predetermined amount is a distance (distance D2) away from the center of the first driven pulley 15. That is, the driven synchronous pulley 40 is positioned at the same location as the second driven pulley 16. Furthermore, the driven synchronous pulley 40 is a component with a rotating mechanism for holding the transport carriage 18 when it moves from the second transport path 4 to the first transport path 3.

[0088] According to the conveyor device 1 of Embodiment 2, when the transport trolley 18 moves from the second transport path 4 to the first transport path 3, it is supported by three points: the first shaft portion 20, the second shaft portion 21, and the fourth traveling wheel 19D. Therefore, even when the transport trolley 18 moves upward from the second transport path 4 to the first transport path 3, the stability of the transport trolley 18 can be improved.

[0089] 3. Implementation Method 3

[0090] Figure 8 This is a schematic diagram showing a structural example of the sorting conveyor device 1B according to Embodiment 3. Figure 8 As shown, the sorting conveyor device 1B further includes an input conveyor device 25 and a delivery conveyor device 26 in the transport section of the conveyor device 1 of Embodiment 1 or the conveyor device 1A of Embodiment 2.

[0091] The input conveyor device 25 is a device having a conveyor function for inputting the transported item 24 by placing it on a transport trolley 18 traveling on the first transport path 3. The input conveyor device 25 is, for example, installed at a predetermined position on the first transport path 3.

[0092] The delivery conveyor device 26 is a device that functions as a conveyor for delivering transported items 24 placed on a transport trolley 18 traveling on the second transport path 4. The delivery conveyor device 26 is, for example, installed at a predetermined position on the second transport path 4. Alternatively, the delivery conveyor device 26 may be a device with only a chute structure. Furthermore, the positions and number of the input conveyor device 25 and the delivery conveyor device 26 can be appropriately set.

[0093] Furthermore, each of the plurality of transport trolleys 18 in the sorting conveyor device 1B is, for example, wrapped with a sorting belt that is driven in a direction perpendicular to the transport direction of the transport trolley 18. Specifically, the sorting belt is wrapped around the portion of the transport trolley 18 on which the transported item 24 is placed, and the transported item 24 is placed on the transport surface of the sorting belt. Then, while moving the transport trolley 18 along the first transport path 3 or the second transport path 4, the sorting belt is driven to a predetermined position on the transport path, thereby moving the transported item 24 to the side of the transport path.

[0094] Alternatively, a roller conveyor can be used instead of a sorting belt, employing multiple synchronously arranged drive rollers to sort the transported items 24. In this case, while moving the transport trolley 18 along the first transport path 3 or the second transport path 4, the multiple drive rollers are driven to predetermined positions on the transport path, thereby moving the transported items 24 to the side of the transport path. Alternatively, an inclined conveyor can be used instead of a sorting belt, equipped with a mechanism that tilts the surface carrying the transported items 24 to sort them.

[0095] According to the classification conveyor device 1B of Embodiment 3, the transported item 24 fed into the input conveyor device 25 is placed on the transport trolley 18, and the transported item 24 is delivered to the target delivery conveyor device 26. Thus, in addition to the effects of Embodiments 1 and 2 described above, the transported item 24 can also be classified.

[0096] Label Explanation

[0097] 1. 1A: Conveyor device; 1B: Classification conveyor device; 2: Frame; 2A: Upper frame; 2B: Lower frame; 3: First transport path; 4: Second transport path; 5: First drive pulley; 6: Synchronous pulley; 7: Second drive pulley; 8: First guide rail; 9: First drive sprocket; 10A: First driven sprocket; 10B: Second driven sprocket; 11A: First linkage synchronous belt; 11B: Second linkage synchronous belt; 12: Second drive sprocket; 13: Third driven sprocket; 14: Third linkage synchronous belt; 15: First driven pulley; 16: Second driven pulley; 17: 18: 2nd guide rail; 19A: 1st traveling wheel; 19B: 2nd traveling wheel; 19C: 3rd traveling wheel; 19D: 4th traveling wheel; 20: 1st shaft; 21: 2nd shaft; 22A: 1st toothed belt; 22B: 2nd toothed belt; 23A: 1st upper traveling rail; 23B: 2nd upper traveling rail; 23C: 1st lower traveling rail; 23D: 2nd lower traveling rail; 24: Transported object; 25: Input to conveyor device; 26: Delivery to conveyor device; 27A: 1st support member; 27B: 2nd support member; 40: Driven synchronous pulley.

Claims

1. A conveyor device, characterized in that, The conveyor device has the following features: The first transport route is located on the upper level; The second transport path is located below the first transport path and moves in the opposite direction to the movement direction of the first transport path; A first drive pulley is disposed at the first end of the first transport path and the second transport path along their length and on one side in a direction perpendicular to the length direction of the first transport path and the second transport path. The first drive pulley has a first gear shape that allows a first shaft portion to be inserted and wound around a first toothed belt. The first shaft portion is disposed at the center of the first travel wheel, which is located in front of the first travel wheel in the direction of movement of the first transport path. The two travel wheels are disposed on one side of the transport trolley circulating in the first transport path and the second transport path. The first drive pulley rotates in such a way that the transport trolley moves in an arc from the first transport path to the second transport path. A timing pulley is disposed on one side and offset by a predetermined amount from the center of the first transport path and the second transport path in the length direction relative to the first drive pulley. The timing pulley has a second gear shape that can be engaged with the shape of the second travel wheel, which is one of the two travel wheels disposed on one side of the transport trolley and corresponds to the rearward direction of the first transport path. The timing pulley rotates at least synchronously with the first drive pulley so that the transport trolley moves in an arc from the first transport path to the second transport path. as well as The second drive pulley is located on the other side of the direction perpendicular to the length direction of the first and second transport paths, and is positioned at the same location as the synchronous pulley in the same direction. The second drive pulley has a first gear shape that allows the second shaft portion to be inserted and wound around the second toothed belt. The second shaft portion is located at the center of the third travel wheel, which is diagonally opposite to the first travel wheel, among the two travel wheels located on the other side of the transport trolley. The second drive pulley rotates at least synchronously with the first drive pulley, so that the transport trolley moves in an arc shape from the first transport path to the second transport path.

2. The conveyor device according to claim 1, characterized in that, The specified amount is the distance from the center of the first drive pulley away from the specified distance. The specified distance is the distance from the center of the first driving wheel to the center of the second driving wheel.

3. The conveyor device according to claim 1, characterized in that, In the second gear shape, the length obtained by subtracting the length of the pitch circle diameter of the synchronous pulley from the length of the root circle diameter of the synchronous pulley is greater than or equal to the radius of the second traveling wheel of the transport trolley.

4. The conveyor device according to claim 1, characterized in that, The conveyor system also features: The first drive sprocket rotates by being driven by a drive motor; The first driven sprocket, together with the first driving sprocket, is wound around the first linkage synchronous belt and rotates in linkage with the first driving sprocket; The second driven sprocket, together with the first driving sprocket, is wound around the second linkage synchronous belt and rotates in linkage with the first driving sprocket; The second drive sprocket rotates by the drive motor or by another drive motor driven synchronously with the drive motor. as well as The third driven sprocket, together with the second drive sprocket, is wound around a third synchronous belt and rotates in conjunction with the second drive sprocket. The first drive pulley rotates in conjunction with the first driven sprocket. The synchronous belt pulley rotates in conjunction with the second driven sprocket. The second drive pulley rotates in conjunction with the third driven sprocket.

5. The conveyor device according to any one of claims 1 to 4, characterized in that, The conveyor device also has a first guide rail, which is disposed at the first end and on the other side, and the first guide rail guides the fourth travel wheel, which is one of the two travel wheels disposed on the other side of the transport trolley and corresponds to the front of the movement direction of the first transport path, from the first transport path to the second transport path in an arc shape.

6. The conveyor device according to claim 5, characterized in that, The conveyor system also features: A first driven pulley is disposed at the second end of the first transport path and the second transport path along their length and on the other side. The first driven pulley has a first gear shape that allows the second shaft portion to be inserted into and to wrap around the second toothed belt. The first driven pulley rotates in conjunction with at least the second drive pulley so that the transport trolley moves in an arc shape from the second transport path to the first transport path. A second driven pulley, disposed on the side and offset by a predetermined amount from the center of the first driven pulley in the length direction of the first and second transport paths, and having a first gear shape that allows the first shaft portion to be inserted into and wound around the first toothed belt, and rotating at least in conjunction with the first drive pulley to cause the transport trolley to move in an arc from the second transport path to the first transport path; and The second guide rail is located at the second end and on the side, and guides the second traveling wheel from the second transport path to the first transport path in an arc shape.

7. The conveyor device according to claim 6, characterized in that, The conveyor device also has a driven synchronous pulley, which is located on the other side at the same position as the second driven pulley. The driven synchronous pulley has a second gear shape that can be engaged by the shape of the fourth driving wheel. The driven synchronous pulley rotates in conjunction with at least the second driving pulley so that the transport trolley moves in an arc from the second transport path to the first transport path.

8. A sorting conveyor device, comprising a conveyor device, an input conveyor device for inputting transported goods, and a delivery conveyor device for delivering said transported goods, characterized in that, The conveyor device has: The first transport route is located on the upper level; The second transport path is located below the first transport path and moves in the opposite direction to the movement direction of the first transport path; A first drive pulley is disposed at the first end of the first transport path and the second transport path along their length and on one side in a direction perpendicular to the length direction of the first transport path and the second transport path. The first drive pulley has a first gear shape that allows a first shaft portion to be inserted and wound around a first toothed belt. The first shaft portion is disposed at the center of the first travel wheel, which is located in front of the first travel wheel in the direction of movement of the first transport path. The two travel wheels are disposed on one side of the transport trolley circulating in the first transport path and the second transport path. The first drive pulley rotates in such a way that the transport trolley moves in an arc from the first transport path to the second transport path. A synchronous pulley is disposed on one side and offset by a predetermined amount from the center of the first transport path and the second transport path in the length direction relative to the first drive pulley. The synchronous pulley has a second gear shape into which a second travel wheel, one of the two travel wheels disposed on one side of the transport trolley and corresponding to the rearward direction of the first transport path, can be inserted. The synchronous pulley rotates at least synchronously with the first drive pulley so that the transport trolley moves in an arc from the first transport path to the second transport path. as well as The second drive pulley is located on the opposite side of the direction perpendicular to the length direction of the first and second transport paths and is positioned at the same location as the synchronous pulley. The second drive pulley has a first gear shape that allows the second shaft portion to be inserted and wound around the second toothed belt. The second shaft portion is located at the center of the third travel wheel, which is diagonally opposite to the first travel wheel, among the two travel wheels located on the other side of the transport trolley. The second drive pulley rotates at least synchronously with the first drive pulley so that the transport trolley moves in an arc from the first transport path to the second transport path.

9. The sorting conveyor device according to claim 8, characterized in that, The transport trolley has a sorting belt that is wrapped around the portion carrying the transported items and is driven in a direction that is horizontally perpendicular to the transport direction of the transport trolley.

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