Conveying device

Abstract

To provide technology for improving packaging efficiency.SOLUTION: A conveying device includes a first conveyor that conveys an approximately rectangular parallelepiped-shaped object with its longitudinal direction perpendicular to the conveying direction, a second conveyor that is arranged downstream of the first conveyor and has a conveying surface that is inclined more steeply with respect to a horizontal plane than a conveying surface of the first conveyor and has a conveying surface having the same horizontal direction component as the first conveyor, and a direction detection part that detects an orientation of the object proceeding downstream of the second conveyor relative to the conveying direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] BACKGROUND ART Conveying devices that convey packages in which absorbent articles are packed in packaging bags are known. Patent Document 1 discloses a package conveying machine that conveys packages in which diapers are packed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-215269 Summary of the Invention [Problem to be solved by the invention]

[0004] Absorbent articles are displayed in stores and the like in packages in which multiple absorbent articles are wrapped together. The multiple packages are then distributed in a packaging box. If the multiple packages are not oriented in the same direction when being packed into the packaging box, the packages cannot be stored correctly in the packaging box, and the packaging efficiency of the packages decreases.

[0005] An object of the present invention is to provide a technology for improving packaging efficiency. [Means for solving the problem]

[0006] A conveying device according to one aspect of the present invention comprises: a first conveyor that conveys an object having a substantially rectangular parallelepiped shape in such a manner that the longitudinal direction of the object is perpendicular to the conveying direction; a second conveyor disposed downstream of the first conveyor, the second conveyor having a conveying surface with a greater inclination with respect to a horizontal plane than the conveying surface of the first conveyor and a conveying surface with the same horizontal direction component as the first conveyor; and a direction detection unit that detects the orientation of the transported object proceeding downstream of the second conveyor with respect to the transport direction. [Effects of the Invention]

[0007] According to the present invention, the packing efficiency of the package can be improved. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a conveying device according to the first embodiment. [Figure 2] FIG. 2 is a plan view of the transport device according to the first embodiment as viewed from above. [Figure 3] FIG. 3 is a perspective view showing the downstream side of the conveyor of the transport device according to the first embodiment. [Figure 4] FIG. 4 is a block diagram showing a control system of the transport device according to the first embodiment. [Figure 5] Fig. 5(a) is a plan view of the transport device according to embodiment 1 as seen from above, and Fig. 5(b) is a plan view of the transport device according to embodiment 1 as seen from above. [Figure 6] FIG. 6 is a perspective view of a conveying device according to the second embodiment. [Figure 7] FIG. 7 is a perspective view of a conveying device according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] A transport device according to an embodiment of the present invention will be described below with reference to the drawings. The configurations of the following embodiments are merely examples, and the present invention is not limited to the configurations of these embodiments.

[0010] <Embodiment 1> FIG. 1 is a perspective view showing a conveying device 1 according to a first embodiment. FIG. 2 is a plan view of the conveying device according to the first embodiment, seen from above. The conveying device 1 according to this embodiment is a device that conveys packages 100 (an example of an "item to be conveyed" in the present disclosure), in which a plurality of disposable paper diapers (hereinafter simply referred to as "diapers") are stored in a packaging bag. The packages 100 are manufactured by forcing a plurality of diapers into a packaging bag and then sealing the bag. The diapers are shipped with a plurality of packages 100 packed in a packaging box (e.g., a cardboard box). The conveying device 1 conveys the packages 100 to a process where they are packed into the packaging box.

[0011] The package 100 has a substantially rectangular parallelepiped shape. The conveying device 1 typically conveys the package 100 such that the longitudinal direction of the package 100 is perpendicular to the conveying direction. The conveying device 1 includes a conveyor 10 (an example of a "first conveyor" in the present disclosure) provided upstream and a conveyor 20 (an example of a "second conveyor" in the present disclosure) provided downstream of the conveyor 10. In FIGS. 1 and 2, the boundary between the conveyor 10 and the conveyor 20 is illustrated as the center. The conveyor 20 takes over the package 100 from the conveyor 10 and conveys it. The conveyors 10 and 20 convey the package 100 such that the longitudinal direction of the package 100 is perpendicular to the conveying direction. In this embodiment, the conveyors 10 and 20 have the same conveying speed.

[0012] The conveyor 10 is a belt conveyor and includes a conveyor belt 11 and a motor (not shown) that drives the conveyor belt 11. The conveyor belt 11 is made of, for example, rubber and is looped around pulleys located at the upstream and downstream ends of the conveyor belt in the conveying direction. The conveyor belt 11, which moves on the upper side between the pulleys at both ends, forms a conveying surface along which the conveyed objects are conveyed. The driving force of a motor is transmitted to the conveyor belt 11 by one of the pulleys at both ends or a separately provided drive pulley, thereby driving the conveyor belt 11. When the conveyor belt 11 is driven, the conveyor 10 conveys packages 100 placed on the conveyor belt 11 in the direction of arrow Y1 in the figure. Note that the heights of the pulleys at both ends of the conveyor 10 are the same, and the diameters of the pulleys at both ends are set to be the same so that the conveying surface is formed approximately on the same plane as a horizontal plane. As a result, the conveyor 10 conveys the packages 100 horizontally. The width of the conveyor belt 11 is set to be longer than the longitudinal length of the package 100, and the package 100 can be placed on the conveying surface so that the longitudinal direction of the package 100 is perpendicular to the conveying direction of the conveyor belt 11.

[0013] The conveyor 10 also includes guide walls 12L and 12R arranged on both sides of the conveyor belt 11. The guide walls 12L and 12R are arranged on both the left and right sides of the conveying surface as seen in the conveying direction. The guide walls 12L and 12R prevent the packages 100 from falling off the conveyor belt 11 during conveyance.

[0014] The conveyor 20 is a belt conveyor similar to the conveyor 10. The conveyor 20 includes a conveyor belt 21 and a motor (not shown) that drives the conveyor belt 21. The conveyor belt 21 is made of, for example, rubber, and is loop-shaped, being wound around pulleys located at the upstream and downstream ends of the conveying direction. The conveyor belt 21, which moves on the upper side between the pulleys at both ends, forms a conveying surface for conveying the objects. The conveyor belt 21 is driven by the driving force of the motor transmitted by either of the pulleys at both ends or a separately provided drive pulley. When the conveyor belt 21 is driven, the conveyor 20 drives the packages 100 placed on the conveyor belt 21 in the direction of arrow Y in the figure. The width of the conveyor belt 21 is set to be longer than the length of the package 100 in the longitudinal direction, so that the package 100 can be placed on the conveying surface so that the longitudinal direction of the package 100 is perpendicular to the conveying direction of the conveyor belt 21.

[0015] The conveyor belt 21 is arranged so that the conveying surface of the conveyor 20 is higher on the downstream side than on the upstream side at the boundary (upstream side) with the conveyor 10. As a result, the conveyor 20 forms a conveying surface with an upward slope toward the downstream side by the conveyor belt 21, and conveys the packages 100 upward relative to the horizontal direction.

[0016] The conveyor 20 also includes guide walls 22L and 22R arranged on both sides of the conveyor belt 21. The guide walls 22L and 22R are arranged on both the left and right sides of the conveying surface as seen in the conveying direction. The guide walls 22L and 22R prevent the packages 100 from falling off the conveyor belt 11 during conveyance.

[0017] Conveyor 20 is disposed downstream of conveyor 10, and packages 100 conveyed by conveyor 10 are transferred from the downstream end of conveyor 10 to the upstream end of conveyor 20. As a result, conveying device 1 forms a continuous conveying path extending from conveyor 10 to conveyor 20. The conveying surface of conveyor 20 on the boundary side with conveyor 10 is inclined more sharply with respect to the horizontal plane than the conveying surface of conveyor 10. In this embodiment, the conveying surface of conveyor 20 on the boundary side with conveyor 10 is formed with an upward slope, and the conveying surface of conveyor 10 is formed in a generally horizontal plane. Furthermore, conveyors 10 and 20 have the same horizontal component of their conveying directions, and as shown in FIG. 2, when conveying device 1 is viewed from above, conveyors 10 and 20 have the same conveying direction.

[0018] 1, the conveying surface at the downstream end of conveyor 10 and the conveying surface at the upstream end of conveyor 20 are arranged so that they are at roughly the same height. These conveying surfaces can be adjusted by adjusting the positions of the pulleys.

[0019] 3 is a perspective view showing the downstream side of the conveyor 20. The conveyor 20 forms an upwardly sloping conveying surface on the upstream side, which is the conveyor 10 side, and then forms a downwardly sloping conveying surface on the downstream side. In the conveyor 20, the pulleys at the upstream end and the downstream end are arranged relatively lower, and the pulleys in the midstream are arranged relatively higher, so that the conveyor belt 21 forms a conveying surface that is upwardly sloping on the upstream side and downwardly sloping on the downstream side. The conveyor belt 21 conveys packages 100 placed on the conveyor belt 21 in the direction of arrow Y3 in the figure.

[0020] The conveying device 1 includes a chute 40 disposed downstream of the conveyor 20. The conveying surface of the conveyor 20 is formed with a downward slope at the downstream end, and the conveying device 1 conveys the packages 100 from the conveyor 20 to the packaging process via the chute 40. The chute 40 includes a downwardly sloping inclined surface 41 made of stainless steel and guide walls 42L and 42R disposed on both sides of the inclined surface 41. The width of the inclined surface 41 is set longer than the longitudinal length of the package 100, and the package 100 slides down the inclined surface 41 in the direction of arrow Y4 with the longitudinal direction of the package 100 perpendicular to the extension direction of the inclined surface 41. The guide walls 42L and 42R prevent the package 100 from falling off the chute 40 as it slides down the inclined surface 41.

[0021] The conveying device 1 also includes a discharge chute 50 (an example of a "discharge passage" in the present disclosure) disposed downstream of the conveyor 20. The discharge chute 50 branches off from the upstream side of the chute 40 in a lateral direction relative to the conveying direction, and in this embodiment, the discharge chute 50 branches off to the right relative to the conveying direction of the chute 40. The discharge chute 50 is used to This is a chute for ejecting a package 100 from the conveying path if the orientation of the delivered package 100 is abnormal. Here, the normal orientation of a package 100 is one in which the longitudinal direction of the package 100 is perpendicular to the conveying direction, and a package 100 that deviates from this orientation by a predetermined angle is considered to be abnormally oriented. Since an abnormally oriented package 100 cannot be properly packed into a packaging box, such a package 100 is temporarily removed from the conveying path via the ejection chute 50 and then manually packed into a packaging box.

[0022] The discharge chute 50 is a pipe chute, and is made of multiple stainless steel pipes arranged so that their rotation axes are parallel to each other, forming a slope 51. The slope 51 extends in the opposite direction to the conveyance path formed by the conveyor 20 and the chute 40. The width of the slope 51 is set to be longer than the longitudinal length of the package 100. The discharge chute 50 causes the package 100 to slide down the slope 51 in the direction of arrow Y5.

[0023] The conveying device 1 also includes a pusher 60 that pushes out packages 100 that are oriented abnormally toward the discharge chute 50. The pusher 60 is disposed opposite the branching point of the chute 40 and the discharge chute 50, and in this embodiment, is disposed on the left side of the chute 40 in the conveying direction. The pusher 60 has a pusher 61 that moves back and forth in a direction perpendicular to the conveying direction of the chute 40. The pusher 61 moves forward to push out the packages 100 toward the discharge chute 50. A fall prevention wall 52 is disposed on the discharge chute 50 at a position opposite the pusher 60. The packages 100 pushed out by the pusher 61 are prevented from falling out of the discharge chute 50 by the fall prevention wall 52 as they move toward the discharge chute 50.

[0024] The conveying device 1 includes a direction detection unit 30 that detects the orientation of the package 100 traveling downstream on the conveyor 20 relative to the conveying direction in order to identify the package 100 being discharged toward the discharge chute 50. In this embodiment, the direction detection unit 30 includes two sensors 31 and 32. The sensors 31 and 32 are transmissive photoelectric sensors. The sensors 31 and 32 are disposed at a predetermined distance from each other on the conveying surface. Specifically, the sensor 31 is disposed upstream, and the sensor 32 is disposed downstream. The sensor 31 includes a light projector 31A and a light receiver 31B. The light projector 31A includes an LED and emits any laser light, such as visible light or infrared light, using the LED as a light source. The laser light may be of a single wavelength or multiple wavelengths (e.g., white). The light receiver 31B receives the laser light, converts it into an electrical signal, and outputs the signal. Like the sensor 31, the sensor 32 also includes a light projector 32A and a light receiver 32B.

[0025] FIG. 4 is a block diagram showing a control system M for the direction detection unit 30 and the extrusion device 60. The conveyance device 1 is equipped with the control system M. The control system M has a control unit M1 that controls the direction detection unit 30 and the extrusion device 60. The control unit M1 includes a CPU (Central Processing Unit). The control unit M1 has a processor such as a Micro-Processing Unit (MPU) or an MPU (Micro-Processing Unit), a volatile memory, and a non-volatile memory. The control unit M1 can perform various controls by having the processor load programs stored in the non-volatile memory into the volatile memory and execute them.

[0026] Here, the arrangement interval between the sensors 31 and 32 will be described with reference to Fig. 3. The light projectors 31A and 32A, and the light receivers 31B and 32B are arranged at intervals longer than the width direction of the package 100 and shorter than the length direction of the package 100, relative to the conveyance surface formed by the conveyor belt 21. If the package 100 is in the correct orientation, that is, if the length direction of the package 100 is perpendicular to the conveyance direction, the sensors 31 and 32 will not detect the package 100 at the same time, and therefore the control unit M1 will determine that the package 100 is in the correct orientation. If the deviation of the package 100 relative to the conveyance direction is relatively large, the control unit M1 will determine that the package 100 is in the correct orientation. If the target is large, sensors 31 and 32 simultaneously detect the package 100. If sensors 31 and 32 simultaneously detect the package 100, control unit M1 determines that the orientation of the package 100 is abnormal. If direction detection unit 30 detects that the orientation of the package 100 is abnormal, control unit M1 activates push-out device 60 to push out the package 100 into discharge chute 50.

[0027] Note that even if the longitudinal direction of the package 100 is misaligned by only a few degrees with respect to the conveying direction, it will not cause any problems in the subsequent packaging process. In this embodiment, a threshold value for the misalignment of the package 100 that is likely to cause an error may be calculated based on the relationship between the misalignment of the package 100 and the occurrence of an error in the subsequent packaging process, and the placement interval between the sensors 31 and 32 may be set based on this threshold value.

[0028] Furthermore, the deviation of the package 100 relative to the conveyance direction may be determined based on the time it takes for the package 100 to pass between the sensors 31 and 32. For example, the control unit M1 may measure the time it takes for the package 100 to pass between the sensors 31 and 32, and determine that the orientation of the package 100 is abnormal if this passing time exceeds a threshold value. The passing time is the time from when the sensor 31 detects the package 100 to when the sensor 32 no longer detects the package 100. Furthermore, this threshold value may be determined based on the conveyance speed of the conveyor 20, the lengths of the package 100 in the longitudinal and lateral directions, and the degree of deviation of the package 100 that is prone to errors.

[0029] When the control unit M1 determines that the orientation of the package 100 is abnormal, it activates the pusher device 60. The pusher device 60 pushes the package 100 toward the discharge chute 50 using the pusher 61. This allows the conveying device 1 to discharge the package 100 with the abnormal orientation midway along the conveying path.

[0030] In the conveying device 1 according to this embodiment, the boundary between the conveyors 10 and 20 exists before the direction detection unit 30. Fig. 5(a) is a plan view of the conveying device 1 seen from above, showing a state in which the package 100 is passing through the boundary between the conveyors 10 and 20. Fig. 5(a) illustrates a case in which the longitudinal deviation of the package 100 relative to the conveying direction is relatively large. Comparing the downstream side of conveyor 10 with the upstream side of conveyor 20, the conveying surface of conveyor 20 has an upward slope at a greater angle to the horizontal than the conveying surface of conveyor 10. Therefore, if the direction perpendicular to the longitudinal direction of package 100 on conveyor 10 is misaligned with the conveying direction, one point on the front edge of package 100 (the lower left corner in FIG. 5(a)) will be on conveyor 20 and one point on the rear edge of package 100 (the upper right corner in FIG. 5(a)) will be on conveyor 10, making package 100 unstable. Because the conveying surface of conveyor 20 is upwardly sloped, package 100 will be even more unstable relative to the conveyor. If package 100 is significantly misaligned, the rear will remain on the conveyor 10 side, further accentuating the misalignment of package 100. If the deviation of the package 100 becomes too great, the direction detection unit 30 can detect that the orientation of the package 100 is abnormal, and such a package 100 can be discharged toward the discharge chute 50. The conveying device 1 according to this embodiment can improve the packing efficiency of the package 100.

[0031] FIG. 5(b) is a plan view of the conveying device 1 seen from above, showing the state in which the package 100 is passing through the boundary between the conveyor 10 and the conveyor 20. FIG. 5(b) illustrates a case in which the deviation of the package 100 in the longitudinal direction relative to the conveying direction is relatively small. When the deviation of the package 100 is relatively small, the package 100 contacts the conveyor 20 at a point, and this point slides downward due to the weight of the package 100, correcting the deviation of the package 100. The conveying device 1 according to this embodiment is configured to correct the deviation of the package 100 by passing through the boundary between the conveyor 10 and the conveyor 20. By providing this, an event occurs in which the misalignment of the package 100 is corrected. When the misalignment of the package 100 is corrected, an error caused by the misalignment of the package 100 does not occur in the packing process of the package 100. According to the conveying device 1 of this embodiment, the packing efficiency of the package 100 can be improved.

[0032] Furthermore, the static friction coefficient of conveyor belt 11 of conveyor 10 may be greater than the static friction coefficient of conveyor belt 21 of conveyor 20. As a result, when package 100 moves from conveyor belt 11 of conveyor 10 to conveyor belt 21 of conveyor 20, the rear side of package 100 can be pushed forward by conveyor belt 11, so that if package 100 is misaligned, this misalignment can be corrected.

[0033] Furthermore, the static friction coefficient of conveyor belt 21 of conveyor 20 may be greater than the static friction coefficient of conveyor belt 11 of conveyor 10. As a result, when package 100 moves from conveyor belt 11 of conveyor 10 to conveyor belt 21 of conveyor 20, the front side of package 100 can be pulled forward by conveyor belt 21. Therefore, if the orientation of package 100 is misaligned, this misalignment can be increased, and in a later process, direction detection unit 30 can detect that the orientation of package 100 is abnormal.

[0034] <Embodiment 2> Next, a description will be given of a conveying device 1 according to embodiment 2. Fig. 6 is a perspective view of the conveying device 1 according to embodiment 2. Fig. 6 mainly illustrates the boundary between the conveyor 10 and the conveyor 20. An arrow Y6 in Fig. 6 indicates the conveying direction of the conveyor 10 and the conveyor 20.

[0035] In this embodiment, the conveyor 10 has the same configuration and structure as the first embodiment and conveys the package 100 in the same direction as the first embodiment. Unlike the first embodiment, the conveyor 20 has a horizontal conveying surface rather than an upwardly inclined conveying surface upstream. The conveyor 20 is positioned such that the conveying surface at its upstream end is higher than the conveying surface at its downstream end. Therefore, at the boundary between the conveyors 10 and 20, the conveying surface of the conveyor 20 is several centimeters to several tens of centimeters higher than the conveyor 10, thereby forming a step. By providing this step between the conveyors 10 and 20, for example, if the front side of the package 100 is not oriented perpendicular to the conveying direction, i.e., if the package 100 is abnormally oriented, the leading corner will land on the conveyor 20 first. In principle, only this corner will be on the conveyor 20. When the center of gravity of package 100 rests on conveyor 20, the opposite corner of the front side of package 100 slides down toward conveyor 20 under its own weight, allowing the front side of package 100 to be oriented perpendicular to the conveying direction. If the orientation of package 100 being conveyed by conveyor 20 is abnormal, direction detection unit 30 can detect this and discharge such package 100 toward discharge chute 50. The conveying device 1 according to this embodiment can improve the packing efficiency of packages 100.

[0036] <Embodiment 3> Next, a description will be given of a conveying device 1 according to a third embodiment. Fig. 7 is a perspective view of the conveying device 1 according to the third embodiment. Fig. 7 mainly illustrates the boundary between the conveyor 10 and the conveyor 20. An arrow Y7 in Fig. 7 indicates the conveying direction of the conveyor 10 and the conveyor 20.

[0037] In this embodiment, the conveyors 10 and 20 are set to have the same conveying surface height at the boundary between them. Furthermore, the conveyor 20 has the same conveying direction as the conveyor 10 at the boundary between them, and a faster conveying speed than the conveyor 10. The conveyor 20 has a conveying surface on its upstream side that is in the same conveying direction as the downstream side of the conveyor 10. For example, if the front edge of the package 100 is not perpendicular to the conveying direction, the corner of the front edge in the conveying direction is pulled forward in the conveying direction, which can increase the deviation of the package 100. If the orientation of the package 100 being conveyed by the conveyor 20 is abnormal, the direction detection unit 30 can detect this and the package 100 can be discharged toward the discharge chute 50. The conveying device 1 according to this embodiment can improve the packaging efficiency of the packages 100.

[0038] <Modification> Next, a modification of the third embodiment will be described. In this modification, the configuration and arrangement of the conveyors 10 and 20 at their boundary are the same, but the conveyor 20 has a slower conveying speed than the conveyor 10. In this conveying device 1, if the front edge of the package 100 is not perpendicular to the conveying direction, the corner of the package 100 will first be loaded onto the conveyor 20. However, the conveyor 10 has a faster conveying speed, so the rear side of the package 100 in the conveying direction can be pushed forward, thereby pushing the delayed corner of the front edge of the package 100 forward. The conveying device according to this modification can push the rear side of the package 100 forward using the conveyor belt 11, so that if the package 100 is misaligned, this misalignment can be corrected. The conveying device 1 according to this modification can improve the packing efficiency of the package 100.

[0039] <Other embodiments> Although the above has described embodiments of the present invention, the various embodiments described above can be combined as much as possible. In the above embodiment, the direction detection unit 30 is provided on the conveyor 20, but the present invention is not limited to this. For example, the direction detection unit 30 may be provided downstream of the conveyor 20 and upstream of the discharge chute 50. The transport path downstream of the conveyor 20 is formed by the chute 40, and deviation of the package 100 often occurs within the conveyor 20. The direction detection unit 30 may be located in a position where it can detect the direction of the package 100 traveling downstream of the conveyor 20, and may be located downstream within the conveyor 20 or downstream of the conveyor 20.

[0040] The features included in each of the embodiments and modifications disclosed above can be combined with each other. [Explanation of symbols]

[0041] 1:Transportation device 10: Conveyor 11: Conveyor belt 12L: Guide wall 12R: Guide wall 20: Conveyor 21: Conveyor belt 22L: Guide wall 22R: Guide wall 30: Direction detection unit 31: Sensor 31A: Floodlight 31B:Receiver 32: Sensor 32A: Floodlight 32B:Receiver 40: Shooter 41: Slope 42L: Guide wall 42R: Guide wall 50: Ejection Shooter 51: Slope 52: Fall prevention wall 60: Extrusion device 61: Pusher 100:Package M: Control system M1: Control unit

Claims

1. a first conveyor for conveying an object having a substantially rectangular parallelepiped shape in such a manner that a longitudinal direction of the object is perpendicular to a conveying direction; a second conveyor disposed downstream of the first conveyor, the second conveyor having a conveying surface with a greater inclination with respect to a horizontal plane than the conveying surface of the first conveyor and having a conveying surface with the same horizontal component as the first conveyor; a direction detection unit that detects the orientation of the transported object proceeding downstream of the second conveyor with respect to the transport direction; A conveying device comprising:

2. a first conveyor for conveying an object having a substantially rectangular parallelepiped shape in such a manner that a longitudinal direction of the object is perpendicular to a conveying direction; a second conveyor disposed downstream of the first conveyor and having a conveying surface that conveys material in a horizontal direction at least upstream, the second conveyor having an upstream end conveying surface that is positioned higher than the downstream end conveying surface of the first conveyor; a direction detection unit that detects the orientation of the transported object proceeding downstream of the second conveyor with respect to the transport direction; A conveying device comprising:

3. a first conveyor for conveying an object having a substantially rectangular parallelepiped shape in such a manner that a longitudinal direction of the object is perpendicular to a conveying direction; a second conveyor disposed downstream of the first conveyor and having a conveying speed different from that of the first conveyor; a direction detection unit that detects the orientation of the transported object proceeding downstream of the second conveyor with respect to the transport direction; A conveying device comprising:

4. a discharge passage disposed downstream of the second conveyor; a push-out device that pushes out the conveyed object toward the discharge passage when the direction detection unit detects that the direction of the conveyed object is abnormal; The conveying device according to claim 1 , comprising:

5. a control unit that controls the direction detection unit, the direction detection unit has two sensors arranged at an interval with respect to the conveyance surface that is longer than the short side direction of the conveyed object and shorter than the long side direction of the conveyed object, the control unit determines that the orientation of the transported object is abnormal when the two sensors simultaneously detect the transported object. The conveying device according to any one of claims 1 to 3.

6. a control unit that controls the direction detection unit, the direction detection unit has two sensors arranged at an interval with respect to the conveyance surface that is longer than the short side direction of the conveyed object and shorter than the long side direction of the conveyed object, the control unit measures a transit time of the transported object between the two sensors, and determines that the orientation of the transported object is abnormal when the transit time exceeds a threshold value. The conveying device according to any one of claims 1 to 3.

7. a discharge passage disposed downstream of the second conveyor; a push-out device that pushes the conveyed object toward the discharge passage; a control unit that controls the direction detection unit and the extrusion device, When the direction detection unit detects that the direction of the conveyed object is abnormal, the control unit activates the push-out device to push the conveyed object into the discharge passage. A conveying device according to any one of claims 1 to 3.

8. The static friction coefficient of the conveying surface of the first conveyor is greater than the static friction coefficient of the conveying surface of the second conveyor. The conveying device according to any one of claims 1 to 3.

9. The static friction coefficient of the conveying surface of the first conveyor is smaller than the static friction coefficient of the conveying surface of the second conveyor. The conveying device according to any one of claims 1 to 3.

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