Pallet conveyance device and pallet conveyance system

Abstract

To provide a pallet conveyance device which enables selection of non-defectives and defectives, and pallet cleaning.SOLUTION: A pallet conveyance device for conveying a pallet includes: an input line to which a pallet is input; a cleaning line which cleans the pallet and from which the cleaned pallet is taken out as a non-defective; a selection line from which the pallet is taken out as a defective; and an operation line for conveying the pallet to either of the cleaning line and the selection line by operation of the user.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pallet transport device and a pallet transport system. [Background technology]

[0002] In the logistics field, this is a device that transports and transfers pallets for carrying cargo. Devices and systems are known (for example, Patent Document 1 and Patent Document 2). [Patent Document 1] Patent No. 5629534 [Patent Document 2] Patent No. 5666697 Summary of the Invention [Problem to be solved by the invention]

[0003] Pallet transport device that can sort non-defective and defective products and clean pallets An apparatus is provided. [Means for solving the problem]

[0004] In a first aspect of the present invention, there is provided a pallet conveying device for conveying a pallet. The pallet conveying device may include an input line. In the input line, the pallets are input. The pallet transport device may include a washing line. In the washing line, the washed pallets are taken out as non-defective products. The pallet transport device may include a sorting line. The pallet transport device may include a handling line. The line can be operated by the user to transport pallets to either the washing line or the sorting line. You may send it.

[0005] The input line may include a first free roller unit. The input line may include a first power roller unit. The first power roller unit The first power roller unit may be connected to a power source. The first power roller unit may transport the pallet in the transport direction. The line section may include a destacking section. The destacking section may be configured to load pallets one by one into the operation line. The pallet may be conveyed by a first free roller unit, a first power roller unit, The sheets may be conveyed in the order of the step-down section.

[0006] The first free roller portion may be provided with an incline.

[0007] The cleaning line may include an inverting unit. The inverting unit is configured to invert the pallet based on a user's operation. The cleaning line may include a second power roller section. The second power roller section includes: The second power roller section may be connected to a power source. The second power roller section may transport the pallet from the inverter section. The washing line may include a washing section. The washing section may wash the pallets. The washing line may include a third The third power roller portion may be connected to a power source. The loading section may transport the pallets from the cleaning section. The cleaning line may include a loading section. The washing line may include a second free-moving roller portion. The roller section may transport pallets from the load section. The cleaning line may include a fourth powered roller section. The fourth power roller portion may be connected to a power source. The fourth power roller portion may be connected to the second swivel roller. The cleaning line may include a third free roller section. The pallet may be removed at the free roller section. The pallet is used in the washing line. a reversing unit, a second power roller unit, a cleaning unit, a third power roller unit, a loading unit, a second free roller unit, The material may be conveyed in this order by the fourth power roller portion and then the third free roller portion.

[0008] The second free roller portion may be provided with an incline.

[0009] The inclination of the second free roller part may be less than the inclination of the first free roller part.

[0010] The third free roller portion may be provided with an inclination. The inclination of the third free roller portion is It may be smaller than the inclination of the roller portion.

[0011] The length of the second free roller part in the transport direction is 1.5 times the length of the pallet in the transport direction. It may be 5 times or more and 2 times or less the length of the pallet in the conveying direction.

[0012] The first power roller unit may be provided with a photoelectric sensor. The first power roller unit may start a conveying operation when the light sensor detects the pallet. If the electrical sensor does not detect the pallet, the transport operation may be stopped.

[0013] The operating line may include an operating unit. The operating unit may be operable by a user. The sorting unit may include a sorting unit that sorts the cleaning line by a user's operation on the operation unit. The sorting line may be connected to the fourth free roller section. The pallet may be removed from the fourth free roller portion. The conveying direction of the roller portion may be inclined or at an angle with respect to the conveying direction of the operation portion.

[0014] In a second aspect of the present invention, there is provided a pallet transport system for transporting a pallet. The pallet transport system may include an input means. The input means inputs the pallets. The pallet transport system may include a cleaning means. The pallets may be washed. The washed pallets may be taken out as non-defective products by the washing means. The pallet transport system may include a sorting means. The pallet transport system may comprise a handling means. The operation means transports the pallet to either the cleaning means or the means line by the user's operation. You may send it. [Brief description of the drawings]

[0015] [Figure 1] 1 is a diagram showing an example of the configuration of a pallet conveying device 1000 according to an embodiment of the present invention. [Diagram 2] FIG. 10 is a flowchart showing pallet transportation performed by the pallet transport device 1000. [Diagram 3] FIG. 10 is a diagram showing the putting step S1010 in detail. [Figure 4] FIG. 10 is a diagram showing the putting step S1010 in detail. [Diagram 5] FIG. 10 is a diagram showing the putting step S1010 in detail. [Figure 6] FIG. 11 is a diagram showing the cleaning step S1030 in detail. [Figure 7] FIG. 11 is a diagram showing the cleaning step S1030 in detail. [Figure 8] FIG. 13 is a diagram showing an example of the configuration of a pallet conveying device 2000 according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The present invention will be described below through the embodiments of the invention. The present invention is not limited to the scope of the present invention. Not all of the combinations are essential to the solution of the invention.

[0017] In this specification, technical matters will be explained using orthogonal coordinate axes of X-axis, Y-axis, and Z-axis as appropriate. The Z axis is the height of the pallet transport device (or pallet transport system) relative to the floor surface on which it is installed. In other words, the Z axis is expressed as the height direction of the pallet transport device. The X and Y axes are The axis is perpendicular to the Z axis. The arrows on the coordinate axes indicate the positive X-axis direction and the positive Y-axis direction. The Z-axis direction is the positive side, and the opposite direction to each arrow on the coordinate axis is the X-axis direction negative side, and the Y-axis direction negative side , expressed as the negative side in the Z-axis direction.

[0018] FIG. 1 shows an example of the configuration of a pallet conveying device 1000 according to an embodiment of the present invention. The pallet conveying device 1000 is a device for conveying pallets. The device 1000 may be expressed as a pallet transport system. In logistics, the pallet is used for loading and unloading work. Pallets are generally used according to the International Organization for Standardization (ISO) The pallet transport device 1000 is, for example, a 14-inch pallets (length of one side is 1400mm) and 11-type pallets (length of one side is 1100mm) The pallet conveying device 1000 can also convey pallets of sizes other than these. may be sent.

[0019] The pallet transport device 1000 is connected to the input line 100, the cleaning line 200, and the sorting line 30. 0 and an operation line 400. The input line 100 is a line where pallets are input. The washing line 200 is a line in which pallets are washed. The sorting line 30 may be a line where the cleaned pallets are removed as non-defective products. 0 is the line where pallets are removed as defective products (NG products). Operation line 400 The pallets are sent to either the washing line 200 or the sorting line 300 by the user's operation. The pallet conveying device 1000 is connected to the input line 100 and the washing line 101. Lines other than the cleaning line 200, the sorting line 300 and the operation line 400 may be provided. The pallet transport device 1000 is connected to the input line 100, the cleaning line 200, and the sorting line 300. And because it is equipped with an operation line 400, it can sort non-defective and defective products and clean pallets in one device. It is possible. Input line 100, washing line 200, sorting line 300, operation line 40 0 may be expressed as an input means, a cleaning means, a sorting means, and an operation means, respectively.

[0020] The input line 100 includes a free roller section 10, a free roller section 20, a power roller section 30, and a stage The feed line 100 may include other components. The feed line 100 includes a free roller unit 10, a free roller unit 20, and a power roller unit 30, and then conveyed to the de-stack section 40.

[0021] The free roller unit 10 is provided with a free roller. In Fig. 1, the free rollers are The conveying direction of the free roller unit 10 is the positive side in the X-axis direction. The pallet is conveyed to the free roller section 20. As will be described later, the free roller section 10 is provided with an incline. A pallet may be inserted into the free roller unit 10. The pallet to be inserted is The pallet may be a pallet in which multiple pallets are stacked (hereinafter referred to as a layered pallet). The number of pallets to be fed may be only one. This is an example of the "first free roller portion" in the paragraph.

[0022] The free roller unit 20 is provided with a free roller. The conveying direction is the positive side of the X-axis direction. In this example, the free roller unit 20 is a power roller unit 3 As will be described later, the power roller unit 30 may be provided with an incline. The free roller portion 20 is an example of the "first free roller portion" in the claims. Alternatively, the roller 20 may be integral with the roller 20. Pallets (tiered pallets) may be inserted from the loading section 20.

[0023] The power roller unit 30 is provided with a power roller. The power roller is connected to a power source. The force roller conveys the pallet (tiered pallet) by rotating in the conveying direction using power. In FIG. 1, the conveying direction of the power roller unit 30 is the X-axis direction. In this embodiment, the power roller unit 30 is a pallet (a pallet) in the step-down unit 40. The power roller unit 30 is an example of a "first power roller unit" in the claims.

[0024] The power roller unit 30 includes a photoelectric sensor 32, a mirror 34, a photoelectric sensor 36, and a mirror 38. A photoelectric sensor is a sensor that converts an optical signal into an electrical signal. The photoelectric sensor 32 emits light to a mirror 34 and detects the reflected light. When a pallet passes between the photoelectric sensor and the sensor 34, the reflected light cannot be detected. The photoelectric sensor 32 detects whether a pallet (tiered pallet) has passed between the photoelectric sensor 32 and the mirror 34. The photoelectric sensor 36 emits light to the mirror 38, so that the photoelectric sensor The photoelectric sensor 36 detects whether a pallet (tiered pallet) has passed between the photoelectric sensor 36 and a mirror 38. can be detected.

[0025] The stacking section 40 stacks the stacked pallets and transports the pallets one by one to the operation line 400. Disassembling a pallet means dismantling the pallet and transporting each pallet individually. In FIG. 1, the conveying direction of the de-stack unit 40 is the positive side in the X-axis direction. .

[0026] The step-down unit 40 includes a photoelectric sensor 42, a photoelectric sensor 44, a photoelectric sensor 46, and a mirror 48. , a photoelectric sensor 52, a mirror 54, a photoelectric sensor 56, and a mirror 58 are provided. The photoelectric sensor 42 and the photoelectric sensor 44 are connected to a pallet (step pallet) between the photoelectric sensor 42 and the photoelectric sensor 44. The photoelectric sensor 46 emits light to a mirror 48. In order to do so, the photoelectric sensor 46 is arranged to detect the pallet (stage pallet) between the photoelectric sensor 46 and the mirror 48. The photoelectric sensor 52 emits light to the mirror 54. In order to prevent this, the photoelectric sensor 52 is rotated so that the pallet (stage pallet) is moved between the photoelectric sensor 52 and the mirror 54. The photoelectric sensor 56 emits light to the mirror 58. Therefore, the photoelectric sensor 56 detects whether a pallet (tiered pallet) is passing between the photoelectric sensor 56 and the mirror 58. It can detect whether or not the item has passed through. The function of each photoelectric sensor will be described later. The conveyor 0 may be provided with a chain conveyor. The chain conveyor is provided with a chain. Chain conveyors, like powered rollers, are connected to a power source and transported by power. The chain conveyor transports the pallets directly by the chain. The power roller is also equipped with a chain conveyor, and the power roller conveys the pallet through the roller. Transport.

[0027] The cleaning line 200 includes a reversing unit 110, a power roller unit 120, a cleaning unit 130, and a power roller unit 120. 140, a loading section 150, a free roller section 160, a power roller section 170, and a free roller section 1 80. The washing line 200 may include other components. The pallet includes: In the cleaning line 200, there is a reversing section 110, a power roller section 120, a cleaning section 130, a power roller 140, loading section 150, free roller section 160, power roller section 170, free roller section 1 They will be transported in the order of 80.

[0028] The reversing unit 110 is provided with a mechanism for reversing the pallet. The arm bar 112 is provided on the pallet 110 for inverting the pallet. The arm bar 112 is provided with a shock absorbing mechanism. A shock absorber may be provided. The reversing unit 110 is also provided with a proximity switch 114 and A proximity switch 114 and a limit switch 116 are provided. 6 is used for the inversion process performed by the inversion unit 110. After inverting the pallet, the inversion unit 110 The sheet is conveyed in the conveying direction of the inverting unit 110. In FIG. The reversing section 110 is a chain conveyor for conveying pallets. A may be provided.

[0029] The power roller unit 120 is provided with a power roller. In FIG. 1, the conveying direction of the power roller unit 120 is the Y-axis. In this example, the power rollers of the power roller unit 120 are arranged in the X direction positive side and the X direction negative side. The pallet is conveyed to the axial negative side (cleaning unit 130). The chain conveyor 10 conveys the pallet in the Y-axis direction positive direction. This is an example of the "second power roller portion" in the claims.

[0030] The power roller unit 120 includes a photoelectric sensor 122, a mirror 124, a photoelectric sensor 126, and a mirror. The photoelectric sensor 122 emits light to the mirror 124. The photoelectric sensor 122 detects whether a pallet has arrived between the photoelectric sensor 122 and the mirror 124. Since the photoelectric sensor 126 emits light to the mirror 128, 26 detects whether or not a pallet has passed between a photoelectric sensor 126 and a mirror 128. The power roller unit 120 may be provided with a lowering mechanism. The pallet conveyed in the Y-axis direction by the conveyor may be lowered. The power rollers may transport the pallet that has been lowered by the lowering mechanism.

[0031] The cleaning unit 130 is provided with a mechanism for cleaning the palette. The cleaning unit 130 may include an air blower. In this example, the cleaning unit 130 is The cleaning unit 130 includes a proximity switch, a brush, and an air blower. A proximity switch 132, a limit switch 134 and a limit switch 136 are provided. The limit switch 132, the limit switch 134 and the limit switch 136 are After cleaning the pallet, the cleaning unit 130 transfers the pallet to the In FIG. 1, the conveying direction of the cleaning unit 130 is the negative side in the X-axis direction. The cleaning section 130 may be provided with a chain conveyor.

[0032] The power roller unit 140 is provided with a power roller. The conveying direction of the power roller unit 140 is the negative side of the X-axis direction. The power roller unit 140 conveys the pallet to the third power roller unit 50. Here is one example.

[0033] The power roller unit 140 includes a photoelectric sensor 142, a mirror 144, a photoelectric sensor 146, and a mirror. The photoelectric sensor 142 emits light to the mirror 144. The photoelectric sensor 142 detects whether or not a pallet has passed between the photoelectric sensor 142 and the mirror 144. Since the photoelectric sensor 146 emits light to the mirror 148, 46 detects whether or not a pallet has passed between a photoelectric sensor 146 and a mirror 148. This can be done.

[0034] The loading section 150 may load pallets and transport them as layered pallets. For example, a 30-tier pallet is transported. The loading section 150 is used for loading the tiered pallets. In this embodiment, the loading section 150 is supported by a free roller section 160. In FIG. 1, the conveying direction of the loading section 150 is the negative side in the X-axis direction. The loading section 150 is also provided with a switch 152. The switch 152 is The loading section 150 is used in the loading process performed by the loading section 150. A chain conveyor may be provided in the loading section 150. .

[0035] The free roller portion 160 is provided with a free roller. The conveying direction of 0 is the negative side of the X-axis direction. The step pallet is conveyed to the roller section 170. As will be described later, the free roller section 160 is provided with an incline. The free roller portion 160 is an example of the "second free roller portion" in the claims. The free roller portion 160 is provided with a limit switch 162 used for the transport operation of the loading portion 150. will be established.

[0036] The power roller unit 170 is provided with a power roller. The conveying direction of 0 is the negative side of the X-axis direction. The power roller unit 170 conveys the pallet to the power roller unit 180. This is an example of a "section".

[0037] The power roller unit 170 includes a photoelectric sensor 172, a mirror 174, a photoelectric sensor 176, and a mirror. The photoelectric sensor 172 emits light to the mirror 174. The photoelectric sensor 172 detects whether or not a pallet has passed between the photoelectric sensor 172 and the mirror 174. Since the photoelectric sensor 176 emits light to the mirror 178, 76 detects whether or not a pallet has passed between a photoelectric sensor 176 and a mirror 178. This can be done.

[0038] The free roller section 180 is provided with a free roller. The pallet is removed as a non-defective product. As will be described later, the free roller portion 180 is provided with an inclination. The free roller portion 180 is an example of the "third free roller portion" in the claims. The free roller section 180 is provided with a limit switch used for the conveying operation of the power roller section 170. 182 will be provided.

[0039] The sorting line 300 includes a free roller section 210, a power roller section 220, a loading section 230, and a The sorting line 300 includes a roller unit 240. The sorting line 300 may include other components. The pallet is conveyed through a free roller section 210, a power roller section 220, and a loading section 300. The sheet is conveyed through the roller section 230 and then the free roller section 240 in that order.

[0040] The free roller portion 210 is provided with a free roller. The conveying direction of 0 is the negative side of the Y axis direction. The pallet is transported to the roller section 220.

[0041] The power roller unit 220 is provided with a power roller. In FIG. 1, the conveying direction of the power roller unit 120 is the Y-axis. In this example, the power rollers of the power roller unit 120 are in the X direction negative side and the X axis direction negative side. The pallet is transported to the axial negative side (loading section 230). The chain conveyor 0 transports pallets in the negative Y-axis direction.

[0042] The power roller unit 220 includes a photoelectric sensor 222, a mirror 224, a photoelectric sensor 226, and a mirror. The photoelectric sensor 222 emits light to the mirror 224. The photoelectric sensor 222 detects whether a pallet has arrived between the photoelectric sensor 222 and the mirror 224. The photoelectric sensor 226 emits light to the mirror 228. 26 detects whether or not a pallet has passed between a photoelectric sensor 226 and a mirror 228. The power roller unit 220 may be provided with a lowering mechanism. The pallet conveyed in the Y-axis direction by the conveyor may be lowered. The power rollers may transport the pallet that has been lowered by the lowering mechanism.

[0043] The loading section 230 may load pallets and transport them as layered pallets. As an example, the loading section 230 is configured to transport a 15-tier pallet. The pallet is transported to the loading section 240. In FIG. 1, the transport direction of the loading section 230 is the X-axis direction. The load unit 230 is provided with a limit switch 232. The switch 232 is used in the loading process performed by the loading unit 230. A conveyor may be provided.

[0044] The free roller portion 240 is provided with a free roller. The pallet is removed as a defective product. Limit switches 242 and 244 are provided for use in the feed operation.

[0045] The operation line 400 includes an operation section 310 and a distribution section 320. The pallet may include other components. 0, then to sorting section 320.

[0046] The operation unit 310 may be operable by a user. The user can determine whether the pallet is good or bad. An inspection table may be provided. The inspection table may be rotated so that the object is placed on the inspection table. In the operation unit 310, the user may rotate the palette in the sorting unit 320. The washing line 200 or the sorting line 300 is designated as the destination of the pallet. For example, the operation unit 310 may include a button corresponding to the cleaning line 200, a button corresponding to the sorting line 201, Each button corresponds to the input 300. When the user presses the button, If the button is selected, the sorting unit 320 transfers the palette to the line corresponding to the button. For this purpose, the operation unit 310 may be provided with a palette inversion mechanism. The arm bar 62 is provided on the portion 310. The arm bar 62 is raised. The arm bar 62 is designed to withstand shocks and allows the pallet to be turned over and the back side of the pallet to be checked. The operation unit 310 may be provided with a photoelectric sensor 3 12, a photoelectric sensor 314, a photoelectric sensor 316 and a photoelectric sensor 318 are provided.

[0047] The sorting unit 320 is configured to sort the cleaning lines 200 and The pallet is conveyed to one of the sorting lines 300. In the sorting section 320, The sorting unit 320 may be provided with a power roller for conveying the material in the Y-axis direction. A chain conveyor may be provided for lifting the materials. The sorting unit 320 may be provided with a lifting mechanism. The sorting unit 320 raises the pallet by raising the lifting mechanism, and the pallet is then guided to the cleaning line 20. 0 or sorting line 300. In this case, the conveying direction of the chain conveyor of the sorting unit 320 is the positive side in the Y-axis direction. When the product is transported to the line 300, the transport direction of the chain conveyor of the sorting unit 320 is the Y-axis direction. It is the negative side.

[0048] The sorting unit 320 is provided with a photoelectric sensor 322 and a mirror 324. 2 emits light to the mirror 324, so the photoelectric sensor 322 is connected to the mirror It is possible to detect whether a pallet has arrived between 324.

[0049] FIG. 2 is a flowchart showing the pallet transportation performed by the pallet transportation device 1000. In the flowchart of the pallet transport performed by the pallet transport device 1000, Step S1010, operation step S1020, washing step S1030 and sorting step S1040 are carried out. Each step will be described in detail below.

[0050] 3, 4 and 5 are diagrams showing the input step S1010 in detail. 5, the free roller unit 10, the free roller unit 20, the power roller unit 30, and The step-down unit 40 is shown. The input step S1010 is performed in the input line 100. In FIG. 3(A), a pallet is inserted into the free roller unit 10. When a pallet is inserted into the pallet transport area, the pallet type (size) may be specified. The specifications of the feeding device 1000 can be changed according to the specified pallet type (size). For example, the sensor to be used may be changed according to the specified pallet type (size). When the pallet is inserted into the free roller unit 10, the inclination of the free roller unit 10 may be changed. The pallet is transported in the transport direction (positive side of the X-axis direction in Figure 3) due to the tilt and the pallet's own weight. do.

[0051] The free roller portion 10 is provided with an inclination. The inclination angle θ1 of the free roller portion 10 is, for example, The inclination angle θ1 of the free roller portion 10 may be 1 degree or more. The inclination angle θ1 of the free roller unit 10 may be 2 degrees or less. The angle θ1 may be 0.5 degrees or more. The inclination angle θ1 of the free roller portion 10 is 3 degrees or less. By providing an inclination to the free roller portion 10, it is possible to eliminate the need for a power roller. In the X-axis direction of the free roller unit 10 shown in FIG. The length L1 of the free roller portion 10 shown in FIG. The length L1 in the X-axis direction is the length of the pallet in the X-axis direction (for a 14-type pallet, The total width may be larger than 1,400 mm.

[0052] In FIG. 3B, the pallet is conveyed to the free roller unit 20. After the pallet is transported, the pallet is moved by the inclination of the free roller portion 20 and the weight of the pallet. The sheet is transported in the transport direction (the X-axis direction in FIG. 3(B)).

[0053] The free roller portion 20 is provided with an inclination. The inclination angle of the free roller portion 20 is, for example, The inclination angle of the free roller portion 20 may be 1 degree or more. The inclination angle of the free roller portion 20 may be 2 degrees or less. The inclination angle of the free roller portion 20 may be 0. The inclination angle of the free roller portion 20 may be 5 degrees or more. The inclination angle of the free roller portion 20 may be 3 degrees or less. The inclination angle of the roller portion 20 may be the same as the inclination angle θ1 of the free roller portion 10. In this case, the inclination angle of the free roller portion 20 is the same as the inclination angle θ1 of the free roller portion 10. The inclination of the free roller portion 20 may be different from the inclination angle θ1 of the free roller portion 10. By providing an inclination to the roller portion 20, the pallet can be transported without installing a power roller. The length L2 of the free roller portion 20 in the X-axis direction shown in FIG. For example, the length in the X-axis direction of the free roller portion 20 shown in FIG. Length L2 is the length of the pallet in the X-axis direction (1400 mm for a 14-type pallet). It's better if it's bigger.

[0054] As shown in FIG. 1 (or the arrow portion in FIG. 3(B)), the negative side of the X-axis direction of the power roller unit 30 A photoelectric sensor 32 is provided near the end. When started, the photoelectric sensor 32 can detect whether a pallet has passed. When the photoelectric sensor 32 detects the passage of the pallet, the power roller provided in the power roller unit 30 In other words, when the photoelectric sensor 32 detects the pallet, the conveyor starts rotating. The operation is started, and if the photoelectric sensor 32 does not detect the pallet, the conveying operation is stopped. The rotation speed of the power roller of the power roller unit 30 is, for example, 150 mm / s. Since a photoelectric sensor 32 is provided on the power roller unit 30, the power roller detects when a pallet arrives. The power roller unit 30 shown in FIG. The length L3 of 30 in the X-axis direction is, for example, 1580 mm. The length L3 of the power roller unit 30 in the X-axis direction is equal to the length (1 For type 4 pallets, it can be larger than 1400mm.

[0055] In FIG. 4(A), the pallet is transported from the power roller unit 30 to the de-stacking unit 40. The photoelectric sensor 46 of the disassembly section 40 detects whether or not a pallet is present in the disassembly section 40. The power roller unit 30 detects that there is no pallet in the disassembly unit 40 by the photoelectric sensor 46. If so, the pallet may be transported to the de-stack section 40.

[0056] As shown in FIG. 1, a photoelectric sensor 36 is provided near the positive end of the power roller unit 30 in the X-axis direction. Therefore, the photoelectric sensor 36 can detect whether the pallet is being conveyed or not. When the photoelectric sensor 36 no longer detects the pallet, the power roller unit 30 In this example, both the photoelectric sensor 32 and the photoelectric sensor 36 are When the pallet is not detected by the power roller unit 30, the power rollers provided in the power roller unit 30 rotate. In other words, when the photoelectric sensor 32 detects the pallet, the conveying operation is started. When neither the photoelectric sensor 32 nor the photoelectric sensor 36 detects a pallet, the conveying operation The power roller unit 30 is provided with a photoelectric sensor 32 and a photoelectric sensor 36. When the pallet arrives, the power roller unit 30 is operated, thereby reducing power consumption. .

[0057] In FIG. 4B, when a pallet is transported to the de-stacking section 40, The rotation speed of the chain conveyor of the disassembly section 40 when pulling in the pallet is The speed is, for example, 150 mm / s. The photoelectric sensors 42 and 44 detect an abnormality in the pallet. If the photoelectric sensor 42 or the photoelectric sensor 44 detects an abnormality in the packing state of the pallet, The disassembly section 40 may stop the chain conveyor. The photoelectric sensor 46 and the mirror 48 are The photoelectric sensor 46 may be provided on a diagonal of the disassembly section 40. The photoelectric sensor 52 and the photoelectric sensor 56 detect the arrival of a pallet. The chain conveyor stops when the pallet is inserted. The step-down unit 40 uses either the photoelectric sensor 52 or the photoelectric sensor 56. The photoelectric sensor 52 is used when transporting an 11-type pallet. The photoelectric sensor 56 is used when transporting a 14-type pallet. When there is no abnormality in each sensor, the stacking unit 4 0 transports the pallets to the operation line 400. The rotation speed of the chain conveyor of the conveying section 40 is, for example, 300 mm / s.

[0058] In FIG. 5(A), a tiered pallet other than the tiered pallet placed on the tiered disassembly section 40 is being transported. In FIG. 5(B), another pallet is conveyed. In FIG. 5(A), In FIG. 5B, the photoelectric sensors 32 and 36 detect the pallet. Since the photoelectric sensor 46 detects the presence of a pallet in the disassembly section 40, the power The power rollers of the puller 30 do not rotate. As described above, the multiple pallets are sequentially conveyed to the unshearing section 40. Being transported.

[0059] In the input line 100, there is a free roller unit 10, a free roller unit 20, a power roller unit 30, Since the pallets are transported in the order of the step-down section 40, the pallets can be transported even if multiple free roller sections are provided. Therefore, in the pallet conveying device 1000, the power roller part Instead, a plurality of free roller portions can be provided, making it possible to reduce power consumption.

[0060] The operation step S1020 is carried out in the operation line 400. When the pallet is transported, the operation unit 310 retracts the pallet. The rotation speed of the chain conveyor 30 is, for example, 300 mm / s. 10 uses a stopper to stop the pallet according to the pallet type (size) specified when loading. The photoelectric sensor 312, the photoelectric sensor 314, the photoelectric sensor 316 and the photoelectric The sensor 318 is used to determine the stop angle of the arm bar 62 .

[0061] In the operation step S1020, the user operates the operation unit 310 to The user judges whether the redd is a good or bad product. 10 indicates whether the pallet is to be transported to the washing line 200 or the sorting line 300. For example, the user may input a button corresponding to the cleaning line 200, a selection button, etc., to the operation unit 310. By pressing the buttons corresponding to the lines 300, the operation unit 310 Specify whether the pallet is to be conveyed to the cleaning line 200 or the sorting line 300. The user does not make a decision and sends the pallets to either the washing line 200 or the sorting line 300. For example, the operation unit 310 may specify whether to convey all the pieces to the cleaning line 200. For example, the operation unit 310 may specify that the sorting line 300 should be transported. may be specified to transport all pallets.

[0062] The sorting unit 320 transports the pallet based on the instruction of the operation unit 310. 22 detects the arrival of the pallet and stops the power roller. Then, the lifting mechanism of the sorting unit 320 lifts the pallet. After the pallet is lifted, The chain conveyor transports the pallets to either the washing line 200 or the sorting line 300. The rotation speed of the power roller and chain conveyor is, for example, 300 mm / s. .

[0063] If the pallet is determined to be a non-defective product in the operation step S1020, the pallet is transported to the cleaning line 200. The cleaning step S1030 is carried out in the cleaning line 200. In the operation step S1020, when the user performs a reversing operation (instruction), the palette The reversing unit 110 may also reverse all pallets that are conveyed. When the pallet is inverted, the limit switch 116 comes into contact with the pallet, and the inverting unit 11 0 stops the chain conveyor. After stopping the pallet, the reversing unit 110 The inversion is performed according to the contact of the switch 114. After the inversion, the inversion unit 110 transfers the pallet to the power The rotation speed of the chain conveyor that conveys the material to the power roller unit 120 is , for example, 300 mm / s.

[0064] Next, the pallet is transported from the power roller section 120 to the cleaning section 130. When the photoelectric sensor 122 at 20 detects the arrival of a pallet, the chain conveyor The pallet is then lowered by the lowering mechanism. The pallet is then lowered by the power rollers. The pallet is conveyed in the X-axis direction. The photoelectric sensor 126 detects the presence or absence of the pallet in the cleaning section 130. If the photoelectric sensor 126 detects that the pallet is not in the cleaning section 130, the power The pallets are transported from the washing section 120 to the cleaning section 130.

[0065] The cleaning unit 130 cleans the pallets. The entrance side of the cleaning unit 130 (the power roller unit 120 An inlet brush (not shown) is provided on the side where the pallets are transported from the inlet to the cleaning section 130. A rotating brush may be provided near the center of the cleaning unit 130. When the pallet is transported from the cleaning section 120 to the cleaning section 130, the inlet brush is a rotating brush. The inside of the cleaning unit 130 is also equipped with a cleaning agent to prevent internal dirt from accumulating. Anti-dust rubber may be provided.

[0066] The proximity switch 132 detects whether the chain conveyor of the cleaning unit 130 stops at the correct position. The proximity switch 132 allows the pallet position in the cleaning section 130 to be normalized. When the mitt switch 134 is pressed, the inlet side (the power roller unit 120 to the cleaning unit The air blower starts to blow air (the side where the pallet is transported to 130). While switch 134 is pressed (while the pallet is passing), the inlet air blower blows air The limit switch 136 is pressed, and the outlet side (cleaning unit 130 The air blower starts spraying air from the side where the pallet is transported to the power roller unit 140. While the limit switch 136 is pressed (while the pallet is passing), the outlet air The blower continues to inject air. The cleaning unit 130 cleans the pallet and then is conveyed to the power roller section 140.

[0067] As shown in FIG. 1, a photoelectric sensor 142 is provided near the positive end of the power roller unit 140 in the X-axis direction. Therefore, when the conveyance to the power roller unit 140 is started, the photoelectric sensor The photoelectric sensor 142 can detect whether a pallet has passed. When the passage of the ball is detected, the power roller provided in the power roller unit 140 starts rotating. The rotation speed of the power roller of the power roller unit 140 is, for example, 300 mm / s. The photoelectric sensor 142 detects the power roller unit 120 while the pallet is passing. The photoelectric sensor 126 of the power roller unit 120 may be notified of a signal. As a result, the photoelectric sensor 126 of the power roller unit 120 detects that the pallet is left in the cleaning unit 130. It is possible to detect whether the

[0068] Next, the pallet is transported from the power roller unit 140 to the loading unit 150. A photoelectric sensor 146 is provided near the negative end of the power roller unit 140 in the X-axis direction. Therefore, the photoelectric sensor 146 can detect whether a pallet is being transported. When the photoelectric sensor 146 detects a pallet, the chain conveyor of the loading section 150 starts to operate. The pallet is pulled in. The photoelectric sensor 146 no longer detects the pallet. In this case, the power rollers provided in the power roller unit 140 stop rotating.

[0069] As shown in FIG. 6A, the loading section 150 loads pallets and transports them as multi-tiered pallets. The switch 152 detects whether a predetermined number of pallets are loaded and When the pallets are loaded, the loading section 150 loads the tiered pallets with a predetermined number of pallets loaded. The predetermined number of stages is, for example, 30 stages.

[0070] Next, the multi-tiered pallet is transported from the loading section 150 to the free-rolling section 160. The limit switch 162 of the roller 160 is provided near the center of the roller 160 in the X-axis direction. While the limit switch 162 of the free roller portion 160 is pressed, the loading portion 1 The transport of the step pallet may be stopped from 50 to the free roller section 160.

[0071] 6 and 7 are diagrams showing the cleaning step 1030 in detail. The length L4 of the portion 160 in the X-axis direction is, for example, 2630 mm. The length of one side of the X-axis direction of the cot is generally 1400 mm. The length L4 of the roller portion 160 in the X-axis direction is 1. 5 times or more and less than twice the length of the pallet in the X-axis direction. The length L4 of the free roller portion 160 in the X-axis direction is shorter than 800 mm. Thus, a multi-tier pallet (hereinafter referred to as a first multi-tier pallet) is loaded on the free roller portion 160. In this case, another tiered pallet (hereinafter referred to as a second tiered pallet) is conveyed from the loading section 150 (FIG. 6(B)), as shown by the arrow, the first stage pallet is pushed up to the power roller unit 170. (FIG. 7(A)). Therefore, by adjusting the length of the free roller portion 160, It is possible to stock step pallets on the free roller portion 160. As shown in FIG. 1B, the loading section 150, the free roller section 160, the power roller section 170 and the free roller section 180 are Each roller section 180 can be stocked with tiered pallets.

[0072] The free roller portion 160 is provided with an inclination. The inclination angle θ2 of the free roller portion 160 is As an example, the inclination angle θ2 of the free roller portion 160 is 1 degree or more. The inclination angle θ2 of the free roller portion 160 may be 2 degrees or less. The inclination angle θ2 of the free roller portion 160 may be 0.5 degrees or more. The inclination of the free roller portion 160 may be 3 degrees or less. Pallets can be transported without the installation of a roller.

[0073] The inclination angle θ2 of the free roller portion 160 is smaller than the inclination angle θ1 of the free roller portion 10. The free roller section 160 may have a number of stages higher than the number of pallets fed into the feeding line 100. In order to transport the pallet, the inclination angle θ2 of the free roller unit 160 is set to the inclination angle θ2 of the free roller unit 10. By making the inclination angle smaller than θ1, the step pallet falls at the free roller portion 160. The inclination angle θ2 of the free roller portion 160 is The inclination angle θ1 of the guide portion 10 may be the same as the inclination angle θ1 of the guide portion 10.

[0074] The pallet is conveyed from the power roller section 170 to the free roller section 180. As shown in FIG. A photoelectric sensor 172 is provided near the X-axis direction positive end of the power roller unit 170. Therefore, when the conveyance to the power roller unit 170 is started, the photoelectric sensor 172 detects the pallet The photoelectric sensor 172 detects the passage of a pallet. When the power roller unit 170 is rotated, the power rollers provided in the power roller unit 170 start to rotate. The rotation speed of the power roller 70 is, for example, 150 mm / s. The length L5 of the power roller unit 170 in the X-axis direction is, for example, 1580 mm. The length L5 of the power roller unit 170 in the X-axis direction shown in FIG. 6(A) is the same as the length L1 of the power roller unit 170 in the X-axis direction of the pallet. The length of the pallet may be longer than the length in the container (1400 mm for a 14-type pallet).

[0075] As shown in FIG. 1, a photoelectric sensor 176 is provided near the negative end of the power roller unit 170 in the X-axis direction. Therefore, the photoelectric sensor 176 detects whether the pallet is being conveyed or not. If the photoelectric sensor 176 no longer detects the pallet, the power roller section The power roller at 170 stops rotating.

[0076] The step pallet is removed at the free roller unit 180. The free roller unit 180 has: A limit switch 182 is provided. When the limit switch 182 is pressed, the movement The conveyance from the force roller unit 170 is stopped. The length L6 in the direction is, for example, 1510 mm. The length L6 of 180 in the X-axis direction is the length of the pallet in the X-axis direction (14-type pallet). For a cot, it may be larger than 1,400 mm.

[0077] The free roller portion 180 is provided with an inclination. The inclination angle θ3 of the free roller portion 180 is As an example, the inclination angle θ3 of the free roller portion 180 is 0.5 degrees or more. The inclination angle θ3 of the free roller portion 180 may be 1 degree or less. The inclination angle θ3 of the free roller portion 160 may be 0.75 degrees or more. The degree θ3 may be equal to or less than 2 degrees.

[0078] The inclination angle θ3 of the free roller portion 180 is smaller than the inclination angle θ2 of the free roller portion 160. The inclination angle θ2 of the free roller portion 160 may be set smaller than the inclination angle θ3 of the free roller portion 180. By reducing the width, the movement of the free roller portion 180 can be minimized. The roller section 180 can store a tiered pallet. The inclination angle θ of the free roller section 180 3 may be the same as the inclination angle θ2 of the free roller portion 160.

[0079] In the cleaning line 200, a loading section 150, a free roller section 160, a power roller section 170, Since the pallets are conveyed in the order of the free roller units 180, even if multiple free roller units are provided, the pallets can be conveyed in the order of the free roller units 180. Therefore, in the pallet conveying device 1000, the power rollers Instead of one roller, multiple rollers can be provided, making it possible to reduce power consumption. do.

[0080] If the pallet is determined to be defective in the operation step S1020, the pallet is sorted on the sorting line 300. The sorting step S1040 is carried out in the sorting line 300. 0 conveys the pallet via the free roller section 210 to the power roller section 220.

[0081] Next, the pallet is transported from the power roller section 220 to the loading section 230. When the photoelectric sensor 222 in 20 detects the arrival of a pallet, the chain conveyor The pallet is then lowered by the lowering mechanism. The pallet is then lowered by the power rollers. The pallet is conveyed in the X-axis direction. The photoelectric sensor 226 detects the presence or absence of the pallet on the loading section 230. If the photoelectric sensor 226 detects that the pallet is not in the loading section 230, the power The pallet is transported from the roller section 220 to the loading section 230. The rotation speed is, for example, 300 mm / s. After that, the pallet is pulled in by the chain conveyor of the loading section 230.

[0082] The loading section 230 may load pallets and transport them as layered pallets. The switch 232 detects whether a predetermined number of pallets have been loaded, and when the predetermined number of pallets have been loaded, When this is the case, the loading section 230 transports a multi-tiered pallet on which a predetermined number of pallets are loaded. The predetermined number of stages is, for example, 15 stages.

[0083] The step pallet is removed at the free roller unit 240. The free roller unit 240 has: A limit switch 242 is provided. When the limit switch 242 is pressed, the stack The conveyance from the carrier 230 is stopped. Furthermore, the free roller portion 240 is provided with a limit switch 2 When the limit switch 244 is pressed, the limit switch 24 4. It is possible to detect a tiered pallet placed on top.

[0084] The free roller portion 240 is provided with an inclination. The inclination of the roller unit 240 may be the same as that of the roller unit 180. In this way, the sorting line 300 includes the free roller unit 240. It is possible to store two tiered pallets in the loading section 230 and one tiered pallet in the loading section 230. .

[0085] As described above, the pallet transport device 1000 can perform the sorting of non-defective and defective products and the pallet sorting in one device. In addition, since multiple free rollers are provided, power consumption is reduced. In addition, a photoelectric sensor is installed in the power roller, so the arrival of the pallet can be detected. When this occurs, the power roller unit is operated, thereby reducing power consumption.

[0086] FIG. 8 is a diagram showing an example of the configuration of a pallet conveying device 2000 according to another embodiment of the present invention. The pallet transport device 2000 is connected to the input line 100, the cleaning line 200, and the sorting line. The pallet conveying device 2000 includes a pallet conveying line 300 and an operation line 400. The same reference numerals as those of the transport device 1000 will not be described.

[0087] The input line 100 of the pallet conveying device 2000 includes a free roller unit 410 and a power roller unit The free roller portion 410 is provided with a free roller. The pallet (tiered pallet) is transported to the power roller unit 420. The power roller unit 420 has: Power rollers are provided to transport the pallets (tiered pallets) to the tiering section 430. The stacking section 430 separates the multi-tiered pallets and transports the pallets one by one to the operation line 400 .

[0088] The cleaning line 200 of the pallet conveying device 2000 includes a free roller unit 510, a power roller unit 520, a cleaning section 530, a loading section 540, a free roller section 550, a power roller section 560, and The free roller unit 510 is provided with a free roller, and the power roller The pallet is conveyed to the power roller unit 520. The power roller unit 520 is provided with a power roller. The pallet is transported to the cleaning section 530. The cleaning section 530 cleans the pallet and The loading section 540 may load the pallets and transport them to the loading section 540. The loading section 540 loads the pallets and transports them to the free roller section 55. The pallet may be conveyed as a step pallet. The power roller unit 560 may be the same as the free roller unit 160 of the pallet conveying device 1. The power roller unit 570 may be the same as the power roller unit 170 of the 000. It may be the same as the free roller portion 180 of the device 1000 .

[0089] The sorting line 300 of the pallet conveying device 2000 includes a free roller unit 610 and a power roller unit 620, a loading section 630 and a free roller section 640. A roller is provided to convey the pallet to the power roller unit 620. The power roller unit 620 is a power A force roller is provided to transport the pallet to the loading section 630. The loading section 630 The pallets may be loaded and transported as a step pallet on the free roller unit 640. The free roller unit 640 includes: The multi-layer pallets are stored and removed at the free roller portion 640.

[0090] The operation line 400 of the pallet transport device 2000 includes an operation section 710 and a sorting section 720. The user can operate the operation unit 710 to determine whether the pallet is good or bad. The sorting unit 720 determines whether the washing line 2 is a product based on the instruction of the operation unit 710. The pallet is transported to either sorting line 300 or sorting line 300.

[0091] In the pallet conveying device 2000, the free roller unit 640 (the fourth free roller in the claims) The conveying direction of the operation unit 710 (X-axis direction negative side) is inclined and has an angle with respect to the conveying direction of the operation unit 710 (X-axis direction negative side). In other words, the conveying direction of the free roller portion 640 is the conveying direction of the operation portion 710 (the negative X-axis direction). The angle of the free roller portion 640 is greater than 0 degrees and smaller than 180 degrees. Since the feeding direction is angled with respect to the conveying direction of the operation unit 710, the pallet conveying device 2000 In addition, the pallet transport device 2000 can be designed with a power load. The conveying direction of the controller 620 is angled with respect to the conveying direction of the operation unit 710 (negative side in the X-axis direction). In the pallet conveying device 2000, the conveying direction of the loading section 630 is the same as that of the operation section 710. It may have an angle with respect to the conveying direction (negative side in the X-axis direction).

[0092] In addition, when a pallet inversion mechanism is provided in the operation unit 310 of the pallet transport device 1000, The arm bar 62 may be provided with casters. This prevents damage to the pallet and allows the pallet to be flipped smoothly. The operation unit 310 includes a button for instructing the washing line 200 to transport all pallets. buttons for instructing the conveyance of all pallets to the sorting line 300 and the sorting line 301, respectively. The operation unit 310 of the pallet transport device 1000 may be provided with a pallet inversion mechanism. In this case, a proximity switch may be provided to pause the operation. In order to facilitate the handling, the pallet conveying device 1000 may be fan-shaped. When a palette inversion mechanism is provided in the operation unit 310, the palette is inverted by using a key provided in the operation unit 310. In order to prevent the pallet from slipping on the rollers, a chain control provided in the operating unit 310 is used. You may allow the bears to rise.

[0093] The present invention has been described above using the embodiments, but the technical scope of the present invention is not limited to the above embodiments. The scope of the present invention is not limited to the above. Various modifications and improvements may be made to the above-described embodiment. It is obvious to those skilled in the art that it is possible to combine the features described in the embodiment. Not all combinations are essential to the solution of the invention.

[0094] The device, system, program, and The order of execution of each process, such as an action, procedure, step, or stage in a method, is specifically defined as "before "in" or "prior to" are not clearly stated, and the output of the previous process is used in the next process. It should be noted that the above may be implemented in any order unless otherwise specified. For the sake of convenience, the operational flow in the drawings is explained using terms such as "first," "next," etc. However, this does not imply that they must be performed in this order. [Explanation of symbols]

[0095] 10....swivel roller portion, 20....swivel roller portion, 30....power roller portion, 32....photoelectric sensor sensor, 34 mirror, 36 photoelectric sensor, 38 mirror, 40 step-down section, 4 2··Photoelectric sensor, 44··Photoelectric sensor, 46··Photoelectric sensor, 48··Mirror, 52· ·Photoelectric sensor, 54··Mirror, 56··Photoelectric sensor, 58··Mirror, 62··Arm bar, 100··feed line, 110··inversion section, 112··arm bar, 114··close contact switch, 116 limit switch, 120 power roller unit, 122 photoelectric sensor sensor, 124 mirror, 126 photoelectric sensor, 128 mirror, 130 cleaning unit , 132·· proximity switch, 134·· limit switch, 136·· limit switch , 140 , power roller unit, 142 , photoelectric sensor, 144 , mirror, 146 , photoelectric Sensor, 148··Mirror, 150··Loading section, 152··Limit switch, 160· ·Free roller section, 162··Limit switch, 170··Power roller section, 172··Light photoelectric sensor, 174 mirror, 176 photoelectric sensor, 178 mirror, 180 self- Roller section, 182··Limit switch, 200··Washing line, 210··Swivel roller 220: power roller; 222: photoelectric sensor; 224: mirror; 226: optical Electric sensor, 228, mirror, 230, loading section, 232, limit switch, 240 ...swivel roller portion, 242...limit switch, 244...limit switch, 300 Sorting line, 310, operating unit, 312, photoelectric sensor, 314, photoelectric sensor, 3 16 photoelectric sensor, 318 photoelectric sensor, 320 sorting unit, 322 photoelectric sensor 324... mirror, 400... operation line, 410... free roller portion, 420... power source Roller portion, 430...step-disassembling portion, 510...swivel roller portion, 520...power roller portion, 530... cleaning section, 540... loading section, 550... free roller section, 560... power roller part, 570....swivel roller part, 610....swivel roller part, 620....power roller part, 63 0·· Loading section, 640·· Free roller section, 710·· Operating section, 720·· Distribution section, 100 0··Pallet transport device, 2000···Pallet transport device

Claims

1. A pallet conveying device for conveying a pallet, an input line into which the pallets are input; The pallets are washed and the washed pallets are taken out as non-defective products. And, a sorting line in which the pallets are removed as defective; The pallets are fed to either the washing line or the sorting line by a user operation. The operation line for transporting the Equipped with Pallet transport device.

2. The input line is a first free roller portion into which the pallet is inserted; a first power roller unit connected to a power source and configured to transport the pallet in a transport direction; a de-stack unit that transports the pallets one by one to the operation line; Including, The pallet is arranged on the input line by the first free roller portion, the first power roller The stacking section and the stacking section are transported in this order.

2. A pallet transport device according to claim 1.

3. The first free roller portion is provided with an inclination.

3. A pallet transport device according to claim 2.

4. The cleaning line comprises: an inverting unit that inverts the palette based on a user operation; a second power roller unit connected to a power source and configured to transport the pallet from the reversing unit; A cleaning unit that cleans the pallet; a third power roller unit connected to a power source and configured to transport the pallet from the cleaning unit; A loading section for loading the pallet; A second free roller unit that transports the pallet from the loading unit; a fourth power roller unit connected to a power source and configured to transport the pallet from the second free roller unit; 、 a third free roller portion from which the pallet is removed; Including, The pallet is arranged in the cleaning line through the reversing unit, the second power roller unit, and the cleaning a cleaning unit, the third power roller unit, the loading unit, the second free roller unit, and the fourth power roller the third free roller section and the third free roller section in that order.

4. A pallet transport device according to claim 3.

5. The second free roller portion is provided with an inclination.

5. A pallet transport device according to claim 4.

6. The inclination of the second free roller portion is smaller than the inclination of the first free roller portion.

6. A pallet transport device according to claim 5.

7. The third free roller portion is provided with an inclination, The inclination of the third free roller portion is smaller than the inclination of the second free roller portion.

6. A pallet transport device according to claim 5.

8. The length of the second free roller portion in the conveying direction is equal to the length of the pallet in the conveying direction. The length of the pallet in the conveying direction is 1.5 times or more and 2 times or less.

5. A pallet transport device according to claim 4.

9. The first power roller unit is provided with a photoelectric sensor, The first power roller unit includes: When the photoelectric sensor detects the pallet, a conveying operation is started. When the photoelectric sensor does not detect the pallet, the conveying operation is stopped.

3. A pallet transport device according to claim 2.

10. The operating line is An operation unit operable by a user; The cleaning line and the sorting line are operated by a user through the operation unit. a sorting unit for transporting the pallets; Including, the sorting line includes a fourth free roller portion from which the pallet is removed, The conveying direction of the fourth free roller portion is inclined and has an angle with respect to the conveying direction of the operation portion. do 2. A pallet transport device according to claim 1.

11. A pallet conveying system for conveying pallets, comprising: An input means for inputting the pallet; a cleaning means for cleaning the pallet and removing the cleaned pallet; a sorting means by which the pallets are removed; The pallet is placed in either the cleaning means or the sorting means by a user operation. A conveying operation means; Equipped with Pallet transport system.

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