WO2021260975A1 - Pallet and pallet conveyance system - Google Patents

Pallet and pallet conveyance system Download PDF

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Publication number
WO2021260975A1
WO2021260975A1 PCT/JP2020/047554 JP2020047554W WO2021260975A1 WO 2021260975 A1 WO2021260975 A1 WO 2021260975A1 JP 2020047554 W JP2020047554 W JP 2020047554W WO 2021260975 A1 WO2021260975 A1 WO 2021260975A1
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WO
WIPO (PCT)
Prior art keywords
pallet
transport direction
contact
deceleration
conveyor
Prior art date
Application number
PCT/JP2020/047554
Other languages
French (fr)
Japanese (ja)
Inventor
進一 友山
Original Assignee
日本電産株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電産株式会社 filed Critical 日本電産株式会社
Priority to JP2022532252A priority Critical patent/JPWO2021260975A1/ja
Priority to CN202080101788.9A priority patent/CN115697866A/en
Publication of WO2021260975A1 publication Critical patent/WO2021260975A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
    • B65G47/88—Separating or stopping elements, e.g. fingers

Definitions

  • the present invention relates to a pallet and a pallet transfer system.
  • a pallet that has a mounting table on which a transported object can be placed and is transported by a conveyor is known.
  • the pallet is conveyed to a predetermined position by the conveyor, it is stopped by a stopper or the like.
  • a pallet that suppresses an impact when it comes into contact with a stopper or the like and prevents rebound from the stopper.
  • Patent Document 1 a pallet in which an inclined portion and a positioning recess are located adjacent to each other in the front portion in the traveling direction and a stop configured to swing in a direction parallel to the transport surface of the conveyor.
  • a pallet deceleration stop device with a positioning roller for use is disclosed. The stop positioning roller is urged in the swing direction by an elastic body.
  • the pallet has the stopping positioning roller in contact with the inclined portion at a predetermined position on the conveyor.
  • the inclined portion causes the stopping positioning roller to swing.
  • the conveyor is decelerated by the urging force of the stopping positioning roller.
  • the stopping positioning roller is engaged with the positioning recess. In this way, the pallet is decelerated and stopped by the stopping positioning roller.
  • the stopping positioning roller is brought into contact with the inclined portion of the pallet from the front of the pallet in a state of being projected from the transport surface of the conveyor. That is, in the deceleration stop device, when the pallet is decelerated and stopped, the stop positioning roller is located in front of the pallet and above the transport surface of the conveyor. Therefore, in the deceleration / stopping device, when other pallets are arranged in a row before and after the pallet to be decelerated, the stopping positioning roller may be arranged in front of the pallet to be decelerated and above the transport surface of the conveyor. Can not.
  • An object of the present invention is to provide a pallet and a pallet transport system capable of decelerating even if other pallets are arranged in a row before and after the transport direction.
  • the pallet according to the embodiment of the present invention is a pallet that has a mounting table on which a conveyed object can be placed and is conveyed by a conveyor.
  • This pallet has a contact portion with which the speed reducing device for decelerating the pallet comes into contact, and an insertion portion into which the speed reducing device is inserted. It is located at least one of the rear ends in the transport direction of.
  • the pallet transport system includes a pallet having a mounting table on which a transported object can be placed, a conveyor having a transport surface for transporting the pallet, a deceleration unit in contact with the pallet, and the deceleration. It is provided with an urging portion that urges the portion toward the pallet.
  • the pallet has a contact portion that comes into contact with the deceleration portion and an insertion portion into which the deceleration portion is inserted. Located on at least one of the ends.
  • deceleration can be performed even if other pallets are arranged in a row before and after the transport direction.
  • FIG. 1 is a diagram showing a schematic configuration of a pallet transfer system according to the first embodiment of the present invention.
  • FIG. 2 is a side view showing a schematic configuration of a pallet according to the first embodiment of the present invention.
  • FIG. 3 is a plan view showing a schematic configuration of a pallet according to the first embodiment of the present invention.
  • FIG. 4 is a side view showing a state in which the pallet is located at the working position and the standby position in the pallet transport system according to the first embodiment of the present invention.
  • FIG. 5 is a side view showing a state in which the pallet is carried out from the working position in the pallet transport system according to the first embodiment of the present invention.
  • FIG. 1 is a diagram showing a schematic configuration of a pallet transfer system according to the first embodiment of the present invention.
  • FIG. 2 is a side view showing a schematic configuration of a pallet according to the first embodiment of the present invention.
  • FIG. 3 is a plan view showing a schematic configuration of a pallet according to the first embodiment of
  • FIG. 6 is a side view showing a state in which the pallet is transported from the working position to the working position in the pallet transport system according to the first embodiment of the present invention.
  • FIG. 7 is a side view showing a state in which the arrangement of pallets is completed at the working position and the standby position in the pallet transport system according to the first embodiment of the present invention.
  • FIG. 8 is a diagram showing a control flow of the first stopper and the second stopper in the pallet transfer system according to the first embodiment of the present invention.
  • FIG. 9 is a side view showing a state of a force applied to the pallet 7 when the pallet 7 according to the first embodiment of the present invention comes into contact with the speed reducing device.
  • FIG. 10 is a side view showing a schematic configuration of a pallet 9 of the pallet transfer system according to the second embodiment of the present invention.
  • FIG. 11 is a side view showing a schematic configuration of a pallet 10 of the pallet transfer system according to the third embodiment of the present invention.
  • FIG. 12 is a plan view showing another embodiment of the pallet in the pallet transfer system according to the present invention.
  • FIG. 13 is a side view showing a schematic configuration of the pallet transfer system according to the fourth embodiment of the present invention.
  • FIG. 14 is a side view showing a schematic configuration of the pallet transfer system according to the fifth embodiment.
  • the transport direction of the pallet 7 (white arrow in FIG. 1) is referred to as “forward direction” or “downstream side of the transport direction”, and the direction opposite to the transport direction of the pallet 7 is “rear direction”. Or, it is called “upstream side in the transport direction”. Further, when viewed from the conveyed object M on the pallet 7, the left side with respect to the conveyed direction is referred to as “left direction”, and the right side with respect to the conveyed direction is referred to as "right direction”.
  • the expressions such as “fixed”, “connected” and “attached” are used not only when the members are directly fixed to each other but also via other members. Including the case where it is fixed. That is, in the following description, the expression such as fixing includes the meaning of direct and indirect fixing between members.
  • FIG. 1 is a diagram showing a schematic configuration of a pallet transfer system 1 according to the first embodiment of the present invention.
  • FIG. 2 is a side view showing a schematic configuration of the pallet 7 according to the first embodiment of the present invention.
  • FIG. 3 is a plan view showing a schematic configuration of the pallet 7 according to the first embodiment of the present invention.
  • the pallet transfer system 1 is a system that conveys the pallet 7 on which the conveyed object M is placed by the conveyor 2.
  • the pallet transfer system 1 is used, for example, as an inspection device for inspecting a transported object M, a processing device for processing a transported object M, and the like.
  • the pallet transfer system 1 includes a conveyor 2, a speed reducing device 3, a first stopper 4, a second stopper 5, a pallet holding portion 6, a plurality of pallets 7, and a control device 8.
  • the conveyor 2 can move in one direction by a drive mechanism (not shown).
  • the conveyor 2 is, for example, an endless band-shaped conveyor belt.
  • the upper surface of the conveyor 2 is a conveyor surface 2a that conveys a plurality of pallets 7.
  • the conveyor 2 includes a plurality of conveyor belts.
  • the conveyor 2 has a plurality of conveyor belts arranged side by side at a wide predetermined interval.
  • the speed reducing device 3 is a device for decelerating the pallet 7.
  • the speed reducing device 3 includes a deceleration unit 3a that comes into contact with the pallet 7 and an urging unit 3b that urges the deceleration unit 3a in the direction of the pallet 7.
  • the speed reducing device 3 is located below the transport surface 2a of the conveyor 2 and at least one in the width direction of the conveyor 2.
  • the speed reducing devices 3 may be provided at a plurality of locations side by side in the width direction of the conveyor 2.
  • the deceleration unit 3a is composed of, for example, a cylindrical roller that is rotatably supported and a support member.
  • the deceleration unit 3a is located below the conveyor 2 with the rollers facing upward. Further, the rotation direction of the rollers in the deceleration unit 3a is the same as the transport direction of the conveyor 2.
  • the deceleration unit 3a is configured to be movable in a direction perpendicular to the transport direction of the pallet 7. In the present embodiment, the deceleration unit 3a is configured to be movable in a direction perpendicular to the transport direction of the pallet 7 and in a direction perpendicular to the transport surface 2a of the conveyor 2.
  • the deceleration unit 3a moves from the lower limit position in a state where it does not protrude from the transport surface 2a of the conveyor 2 to the upper limit position where it protrudes from the transport surface 2a of the conveyor 2. Further, the deceleration unit 3a is located so as to be movable in the vertical direction between the conveyor belts constituting the conveyor 2 and the conveyor belts. That is, the deceleration unit 3a projects upward from the transport surface 2a from substantially the center in the width direction of the conveyor 2 at the upper limit position.
  • the urging portion 3b is composed of, for example, a compression spring.
  • the urging unit 3b urges the deceleration unit 3a in the direction of the conveyor surface 2a.
  • the urging portion 3b is urged in a direction perpendicular to the transport direction of the pallet 7 and in a direction perpendicular to the transport surface 2a of the conveyor 2.
  • the deceleration unit 3a is maintained at the upper limit position protruding upward from the transport surface 2a of the conveyor 2 by the urging force of the urging unit 3b.
  • the deceleration unit 3a moves toward the conveyor surface 2a of the conveyor 2.
  • the first stopper 4 is a member for stopping the pallet 7 mounted on the conveyor 2 with respect to the conveyor 2.
  • the first stopper 4 stops the pallet 7 at the working position Ws on the conveyor 2.
  • the working position Ws is a position where work such as processing, assembling, and inspection is performed on the conveyed object M placed on the pallet 7.
  • the first stopper 4 moves up and down at a predetermined position on the conveyor 2 by a drive mechanism (not shown).
  • the first stopper 4 lowers the pallet 7 to the work stop position SP1 where the pallet 7 can be stopped at the work position Ws with respect to the conveyor 2, and allows the pallet 7 to move from the work position Ws, the first stopper 4 moves the pallet 7. It rises to the work release position RP1 which does not hinder.
  • the second stopper 5 is a member for stopping the pallet 7 mounted on the conveyor 2 with respect to the conveyor 2.
  • the second stopper 5 is located upstream of the first stopper 4.
  • the second stopper 5 stops the pallet 7 at the standby position Ss on the conveyor 2.
  • the standby position Ss is a position where the pallet 7 on the upstream side is made to stand by on the conveyor 2 until the work at the work position Ws is completed.
  • the second stopper 5 moves up and down at a predetermined position on the conveyor 2 by a drive mechanism (not shown).
  • the stopper 5 does not hinder the movement of the pallet 7 when the pallet 7 is lowered to the standby stop position SP2 where the pallet 7 can be stopped at the standby position Ss with respect to the conveyor 2 and the movement of the pallet 7 from the standby position Ss is allowed. It rises to the standby release position RP2.
  • the pallet holding portion 6 prevents the pallet 7 mounted on the conveyor 2 from being lifted by the speed reducing device 3.
  • the pallet holding portion 6 is located above the transport surface 2a of the conveyor 2.
  • the pallet holding portion 6 has, for example, a holding roller at a position facing the transport surface 2a of the conveyor 2.
  • the rotation direction of the holding roller in the pallet holding portion 6 is the same as the conveying direction of the conveyor 2.
  • the pallet holding portion 6 is located at a position facing the deceleration portion 3a of the deceleration device 3.
  • the pallet holding portion 6 is located at a position where the holding roller comes into contact with the upper surface of the pallet 7 when the pallet 7 mounted on the conveyor 2 passes below the pallet holding portion 6. That is, the pallet holding portion 6 can come into contact with the pallet 7 while suppressing friction with the pallet 7 while the deceleration portion 3a is in contact with the pallet 7 conveyed on the conveyor 2.
  • the plurality of pallets 7 have a mounting table on which the conveyed object M can be placed, and are conveyed by the conveyor 2.
  • the plurality of pallets 7 are located side by side on the conveyor 2 in the transport direction.
  • the plurality of pallets 7 move in the transport direction together with the conveyor 2 while being mounted on the conveyor 2. Therefore, the transport direction of the pallet 7 is the moving direction of the conveyor 2, and is the direction in which the transport surface 2a of the conveyor 2 extends.
  • the pallet 7 has a pallet main body portion 7a, a contact portion 7b, and a protruding portion 7d.
  • the pallet 7 is made of, for example, engineering plastic.
  • the material of the bullet is not limited to engineering plastics.
  • the pallet body 7a is a flat plate-shaped member on which the conveyed object M can be placed.
  • the pallet main body 7a includes a mounting table on which the conveyed object M is placed.
  • the pallet body 7a has a rectangular shape in a plan view.
  • the valet main body is placed on the transport surface 2a of the conveyor 2.
  • a mounting table Mb for the conveyed object M is provided on the upper surface of the pallet main body 7a.
  • a contact portion 7b that comes into contact with the speed reducing device 3 is provided at the front end portion of the pallet body portion 7a in the transport direction.
  • the contact portion 7b has a contact inclined surface 7c.
  • the contact inclined surface 7c is an inclined surface that inclines in a direction away from the speed reducing device 3 toward the downstream side in the transport direction. That is, the front end portion of the pallet main body 7a in the transport direction has a contact inclined surface 7c that goes upward from the lower surface of the pallet main body 7a toward the downstream side in the transport direction.
  • the protruding portion 7d separates another pallet 7 adjacent to the pallet main body portion 7a.
  • the protruding portion 7d protrudes from the rear end portion of the pallet main body portion 7a in the transport direction toward the upstream side in the transport direction.
  • the protruding portion 7d comes into contact with the front end portion of the other pallet 7 adjacent to the upstream side in the transport direction of the pallet 7.
  • the protruding portion 7d separates the contact portion 7b of another pallet 7 adjacent to the upstream side in the transport direction of the pallet 7 from the pallet main body portion 7a.
  • a gap is created between the rear end of the pallet body 7a in the transport direction and the contact portion 7b of another pallet 7 adjacent to the upstream side of the pallet 7 in the transport direction.
  • an insertion portion 7e having a gap into which the deceleration portion 3a of the deceleration device 3 can be inserted is configured.
  • the insertion portion 7e is composed of a pallet main body portion 7a and a protruding portion 7d.
  • the pallet 7 configured in this way has a contact inclined surface 7c included in the contact portion 7b at the front end portion in the transport direction. Further, the pallet 7 has an insertion portion 7e at the rear end portion in the transport direction.
  • the front end portion of the pallet 7 in the transport direction comes into contact with the protruding portion 7d of the other pallet 7 on the downstream side in the transport direction of the pallet 7.
  • the protruding portion 7d provided at the rear end of the pallet 7 in the transport direction is the other pallet on the upstream side of the pallet 7 in the transport direction. 7 contacts the front end in the transport direction.
  • the insertion portion 7e of the other pallet 7 is located on the downstream side of the pallet 7 in the transport direction.
  • the insertion portion 7e of the pallet 7 is located on the downstream side of the other pallet 7 in the transport direction. In this way, even if the plurality of pallets 7 are located in a row on the upstream side in the transport direction or the downstream side in the transport direction, the insertion portion 7e is located on the downstream side in the transport direction of the pallets 7. ing.
  • the control device 8 is a device that controls the first stopper 4 and the second stopper 5.
  • the control device 8 may have a configuration in which a CPU, ROM, RAM, HDD, etc. are substantially connected by a bus, or may have a configuration including a one-chip LSI or the like.
  • the control device 8 stores various programs and data for controlling the operation of the first stopper 4 and the second stopper 5.
  • the control device 8 is electrically connected to an actuator of a control mechanism (not shown) of the first stopper 4 and an actuator of a control mechanism (not shown) of the second stopper 5.
  • the control device 8 can transmit a control signal to the actuator of the control mechanism of the first stopper 4 and the actuator of the control mechanism of the second stopper 5.
  • the control device 8 can control the actuator to switch the position of the first stopper 4 between the work stop position SP1 and the work release position RP1. Further, the control device 8 can control the actuator to switch the position of the second stopper 5 between the standby stop position SP2 and the standby release position RP2.
  • the control device 8 is set with a work position carry-out time Wt required for the pallet 7 to be carried out from the work position Ws by the conveyor 2. Further, the control device 8 is set with a standby position carry-out time St required for the pallet 7 to be carried out from the standby position Ss by the conveyor 2.
  • FIG. 4 is a side view showing a state in which the pallet 7 is arranged at the working position Ws and the standby position Ss in the pallet transport system 1.
  • FIG. 5 is a side view showing a state in which the pallet 7 is carried out from the working position Ws in the pallet transfer system 1.
  • FIG. 6 is a side view showing a state in which the pallet 7 is transported from the working position Ws to the working position Ws in the pallet transport system 1.
  • FIG. 7 is a side view showing a state in which the arrangement of the pallets 7 is completed at the working position Ws and the standby position Ss in the pallet transport system 1.
  • FIG. 8 is a diagram showing a control flow of the first stopper 4 and the second stopper 5 in the pallet transfer system 1.
  • the first stopper 4 is in a state of being switched to the work stop position SP1 as an initial state.
  • the second stopper 5 is in a state of being switched to the standby stop position SP2 as an initial state.
  • the pallet transfer system 1 has a first pallet 7A, a second pallet 7B, a third pallet 7C, and a fourth pallet 7D as a plurality of pallets 7. The pallet transfer system 1 is located in the order of the first pallet 7A, the second pallet 7B, the third pallet 7C, and the fourth pallet 7D from the downstream side to the upstream side in the transfer direction of the conveyor 2.
  • the first pallet 7A is stopped by the first stopper 4 at the working position Ws on the conveyor 2.
  • the first pallet 7A is located at the working position Ws.
  • the second pallet 7B is stopped by the second stopper 5 at the standby position Ss on the conveyor 2.
  • the second pallet 7B is located at the standby position Ss.
  • the third pallet 7C is connected to the second pallet 7B and stopped.
  • the fourth pallet 7D is connected to the third pallet 7C and stopped.
  • the insertion portion 7e of the second pallet 7B is located on the downstream side of the third pallet 7C in the transport direction. That is, the insertion portion 7e of the second pallet 7B is continuously located on the downstream side of the contact portion 7b in the third pallet 7C in the transport direction. Similarly, the insertion portion 7e of the third pallet 7C is continuously located on the downstream side of the contact portion 7b in the fourth pallet 7D in the transport direction.
  • the speed reducing device 3 of the pallet transfer system 1 is located near the insertion portion 7e of the second pallet 7B stopped at the standby position Ss.
  • the deceleration portion 3a of the speed reduction device 3 is inserted into the insertion portion 7e of the second pallet 7B from below the conveyor 2 by the urging force of the urging portion 3b. That is, the deceleration unit 3a is located on the downstream side of the contact portion 7b in the third pallet 7C in the transport direction. At this time, the deceleration unit 3a is not in contact with the contact portion 7b of the third pallet 7C.
  • step S110 the control device 8 of the pallet transfer system 1 operates the first stopper 4 at the work position Ws until the operation on the conveyed object M placed on the first pallet 7A is completed.
  • the state of switching to the stop position SP1 is maintained.
  • the control device 8 maintains a state in which the second stopper 5 is switched to the standby stop position SP2 until the work on the conveyed object M mounted on the first pallet 7A is completed at the working position Ws.
  • step S120 when the work on the conveyed object M placed on the first pallet 7A at the work position Ws is completed, the control device 8 sets the first stopper 4 at the work stop position SP1. Switch to the work release position RP1 from.
  • step S130 after the control device 8 switches the first stopper 4 to the work release position RP1, the work position carry-out time Wt required for the first pallet 7A to be carried out from the work position Ws by the conveyor 2 elapses. Until then, the state in which the first stopper 4 is switched to the work release position RP1 is maintained. The first pallet 7A is carried out from the working position Ws by the conveyor 2.
  • step S140 the control device 8 switches the first stopper 4 to the work stop position SP1 after the work position carry-out time Wt has elapsed.
  • step S150 the control device 8 takes the second stopper 5 at an arbitrary timing after the work position carry-out time Wt has elapsed after the first stopper 4 is switched to the work release position RP1. Is switched from the standby stop position SP2 to the standby release position RP2.
  • step S160 after the control device 8 switches the second stopper 5 to the standby release position RP2, the standby position carry-out time St required for the second pallet 7B to be carried out from the standby position Ss by the conveyor 2 elapses. Until then, the state in which the second stopper 5 is switched to the standby release position RP2 is maintained.
  • step S170 the control device 8 switches the second stopper 5 to the standby stop position SP2 after the work position carry-out time Wt has elapsed.
  • the second pallet 7B stopped at the second stopper 5 is carried out toward the working position Ws by the conveyor 2 when the second stopper 5 is switched to the standby release position RP2.
  • the second pallet 7B is conveyed downstream in the conveying direction until it comes into contact with the first stopper 4.
  • the second pallet 7B is located at the working position Ws by coming into contact with the first stopper 4.
  • the third pallet 7C which is stopped in a row on the upstream side of the second pallet 7B in the transport direction, is connected to the second pallet 7B. It is transported toward the downstream side in the transport direction.
  • the third pallet 7C comes into contact with the contact portion 7b of the speed reducing device 3 located on the downstream side in the transport direction of the third pallet 7C.
  • the third pallet 7C is decelerated by the speed reducing device 3, that is, the transport speed of the third pallet 7C is smaller than the transport speed of the second pallet 7B on the downstream side in the transport direction. Therefore, the third pallet 7C is separated from the second pallet 7B.
  • the second pallet 7B is conveyed from the standby position Ss to the work position Ws while the standby position carry-out time St elapses.
  • the third pallet 7C is decelerated by the speed reducing device 3
  • the standby position Ss has not been reached even after the standby position carry-out time St has elapsed.
  • the pallet transfer system 1 inserts the second pallet 7B between the second pallet 7B and the third pallet 7C by switching the second stopper 5 to the standby stop position SP2 after the standby position carry-out time St has elapsed. can do.
  • the third pallet 7C passes through the speed reducing device 3, it comes into contact with the second stopper 5 which has been switched to the standby stop position SP2, and is located at the standby position Ss.
  • the fourth pallet 7D connected to the upstream side in the transport direction of the third pallet 7C is transported toward the downstream side in the transport direction in a state of being connected to the third pallet 7C.
  • the fourth pallet 7D is continuously stopped on the upstream side in the transport direction of the third pallet 7C.
  • the pallet transfer system 1 configured as described above includes the first pallet 7A, the second pallet 7B, the third pallet 7C, and the fourth pallet 7D, which are a plurality of pallets 7 having a mounting table on which the conveyed object M can be placed.
  • a conveyor 2 having a transport surface 2a for transporting the first pallet 7A, the second pallet 7B, the third pallet 7C and the fourth pallet 7D, and the first pallet 7A, the second pallet 7B, the third pallet 7C and the fourth pallet.
  • the deceleration unit 3a of the deceleration device 3 that comes into contact with one of the pallets 7 of 7D, the urging unit 3b that urges the deceleration unit 3a toward one pallet 7, and one pallet 7 are stopped at the working position Ws.
  • the first stopper 4 for switching the work stop position SP1 and the work release position RP1 for carrying out one pallet 7 from the work position Ws, and one pallet 7 on the downstream side in the transport direction from the position of the deceleration unit 3a.
  • the standby stop position SP2 for stopping at the standby position Ss located on the upstream side of the work position Ws in the transport direction and the second stopper 5 for switching to the standby release position RP2 for carrying out one pallet 7 from the standby position Ss. I have.
  • the first stopper 4 switches from the work stop position SP1 to the work release position RP1 when the work on the conveyed object M of the first pallet 7A stopped at the work position Ws is completed.
  • the first stopper 4 switches to the work stop position SP1 after the work position carry-out time Wt required for the first pallet 7A at the work position Ws to be carried out from the work position Ws has elapsed.
  • the second stopper 5 is switched to the standby release position RP2 after the work position carry-out time Wt has elapsed after the first stopper 4 is switched to the work release position RP1.
  • the second stopper 5 switches to the standby stop position SP2 when the standby position carry-out time St required for the second pallet 7B stopped at the standby position Ss to be carried out from the standby position Ss elapses.
  • the third pallet 7C on the upstream side of the second pallet 7B in the standby position Ss is carried into the standby position Ss while being decelerated by the deceleration unit 3a.
  • the first stopper 4 of the pallet transfer system 1 switches between the work release position RP1 and the work stop position SP1 after the work position carry-out time Wt has elapsed after the work at the work position Ws with respect to the first pallet 7A is completed. ..
  • the second stopper 5 switches to the standby release position RP2 when the work position carry-out time Wt elapses. Further, the second pallet 7B is switched to the standby stop position SP2 when the standby position carry-out time St has elapsed after switching to the standby release position RP2.
  • the second stopper 5 is switched to the standby stop position SP2 and then waits. Stopped at position Ss.
  • the pallet transfer system 1 can switch between the first stopper 4 and the second stopper 5 based on the work position carry-out time Wt and the standby position carry-out time St.
  • FIG. 9 is a side view showing the state of the force applied to the pallet 7 when the pallet 7 comes into contact with the speed reducing device 3.
  • the second pallet 7B stopped at the standby position Ss by the second stopper 5 and the third pallet 7C stopped in a row on the upstream side in the transport direction of the second pallet 7B will be described. conduct.
  • the insertion portion 7e provided at the rear end portion of the second pallet 7B in the transport direction is adjacent to the front end portion of the third pallet 7C in the transport direction. That is, the insertion portion 7e of the second pallet 7B is located adjacent to the downstream side of the contact portion 7b provided at the front end portion of the third pallet 7C in the transport direction in the transport direction.
  • a contact portion 7b provided at the front end portion of the fourth pallet 7D in the transport direction is adjacent to the rear end portion of the third pallet 7C in the transport direction.
  • the deceleration section 3a of the speed reducer 3 is inserted into the insertion section 7e of the second pallet 7B from below the conveyor 2 by the urging force of the urging section 3b. That is, the deceleration unit 3a is located on the downstream side of the contact portion 7b in the third pallet 7C in the transport direction.
  • the pallet 7 is provided with the contact portion 7b at the front end portion in the transport direction and the insertion portion 7e at the rear end portion in the transport direction, so that the other pallets 7 are continuously positioned on the downstream side in the transport direction.
  • the second pallet 7B stopped at the second stopper 5 is carried out toward the downstream side in the transport direction by the conveyor 2 when the second stopper 5 is switched to the standby release position RP2.
  • the third pallet 7C which is stopped in a row on the upstream side of the second pallet 7B in the transport direction, is connected to the second pallet 7B. It is transported toward the downstream side in the transport direction.
  • the contact portion 7b of the third pallet 7C has a contact inclined surface 7c that inclines in a direction away from the deceleration portion 3a of the speed reducer 3 toward the downstream side in the transport direction. That is, the contact portion 7b has a contact inclined surface 7c that inclines in a direction approaching the deceleration portion 3a toward the upstream side in the transport direction.
  • the contact portion 7b of the third pallet 7C comes into contact with the deceleration portion 3a.
  • the third pallet 7C pushes the deceleration portion 3a toward the downstream side in the transport direction by the contact inclined surface 7c of the contact portion 7b.
  • the decelerating portion 3a is pushed down in the direction of the transport surface 2a of the conveyor 2 by the contact inclined surface 7c of the contact portion 7b.
  • the urging unit 3b of the speed reducing device 3 generates an urging force in the direction of pushing up the deceleration unit 3a in proportion to the pushing down amount of the deceleration unit 3a.
  • the deceleration unit 3a pushes the contact inclined surface 7c of the contact portion 7b vertically and upward in the transport direction by the force F.
  • the contact inclined surface 7c of the contact portion 7b of the third pallet 7C is parallel to the contact inclined surface 7c of the contact portion 7b and downstream in the transport direction as a component of the force F transmitted from the deceleration portion 3a of the speed reducing device 3.
  • a component force F1 in the direction of the inclined surface and a component force F2 in the direction perpendicular to the contact inclined surface 7c are generated.
  • the vertical component force F2 is a component force toward the upstream side in the transport direction. Therefore, the third pallet 7C is decelerated by the vertical component force F2, which is the component force of the force F transmitted from the deceleration unit 3a.
  • the third pallet 7C pushes down the deceleration portion 3a by the contact inclined surface 7c as it is transported to the downstream side in the transport direction.
  • the force F transmitted from the deceleration unit 3a increases as the pallet is conveyed to the downstream side in the conveying direction.
  • the inclined surface direction component force F1 and the vertical direction component force F2 transmitted from the deceleration unit 3a increase as the pallet is conveyed to the downstream side in the transfer direction. That is, the third pallet 7C is decelerated at a deceleration rate that increases at a constant rate as it is transported to the downstream side in the transport direction.
  • the deceleration portion 3a of the speed reducing device 3 comes into contact with the contact inclined surface 7c while being transported to the downstream side in the transport direction, so that a vertical component force F2 toward the upstream side in the transport direction is generated. ..
  • the third pallet 7C is decelerated by the vertical component force F2 toward the upstream side in the transport direction while the deceleration portion 3a is in contact with the contact inclined surface 7c and is moving on the contact inclined surface 7c.
  • the third pallet 7C is decelerated at a deceleration rate that increases at a constant rate as it is transported to the downstream side in the transport direction.
  • the rollers constituting the deceleration unit 3a come into contact with the contact inclined surface 7c of the pallet 7 while rotating. That is, the third pallet 7C does not generate a deceleration force due to sliding friction when the contact portion 7b comes into contact with the third pallet 7C.
  • the pallet transfer system 1 can decelerate one pallet 7 without disturbing the arrangement of the plurality of pallets 7 even if the plurality of pallets 7 are conveyed side by side without gaps.
  • the vertical component force F2 which is a component force in the direction away from the conveyor surface 2a of the conveyor 2, is transmitted from the deceleration unit 3a of the speed reducer 3.
  • the vertical component force F2 transmitted from the deceleration unit 3a increases as the pallet is conveyed downstream in the conveying direction. While the deceleration portion 3a is in contact with the third pallet 7C, the roller of the pallet holding portion 6 is in contact with the upper surface of the third pallet 7C. That is, even if the vertical component force F2 transmitted from the deceleration unit 3a increases, the third pallet 7C is lifted from the transport surface 2a of the conveyor 2 by the pallet holding unit 6 to prevent the posture from being disturbed. Therefore, in the third pallet 7C, the vertical component force F2 is not dispersed due to the floating of the third pallet 7C.
  • the third pallet 7C pushes down the deceleration portion 3a of the speed reducer 3 to the lower limit position in a state where it does not protrude from the transport surface 2a of the conveyor 2 by the contact inclined surface 7c of the contact portion 7b by transporting to the downstream side in the transport direction. ..
  • the third pallet 7C pushes the deceleration portion 3a down to the lower limit position by the bottom surface of the pallet main body portion 7a provided at the upstream end of the contact inclined surface 7c in the transport direction.
  • the third pallet 7C is further conveyed to the downstream side in the conveying direction in a state where the deceleration portion 3a is pushed down to the lower limit position by the bottom surface of the pallet main body portion 7a.
  • the deceleration portion 3a is inserted into the insertion portion 7e provided at the rear end portion of the pallet body portion 7a in the transport direction. ..
  • the deceleration unit 3a of the deceleration device 3 inserted into the insertion unit 7e of the third pallet 7C is located on the downstream side of the contact portion 7b of the fourth pallet 7D in the transport direction. Therefore, the contact portion 7b of the fourth pallet 7D comes into contact with the deceleration portion 3a when it is transported to the downstream side in the transport direction.
  • the insertion portion 7e is provided at the rear end portion of the third pallet 7C in the transport direction. Therefore, the insertion portion 7e of the third pallet 7C into which the deceleration portion 3a can be inserted is located on the downstream side of the contact portion 7b of the fourth pallet 7D to be located in the transport direction.
  • FIG. 10 shows a schematic configuration of the pallet 9 of the pallet transfer system 1A according to the second embodiment.
  • the pallet 9 has a protruding portion 9d at the front end portion of the pallet main body portion 9a in the transport direction.
  • the configuration of the pallet transfer system 1A is the same as the configuration of the pallet transfer system 1A of the first embodiment except for the pallet 9. Therefore, in the following, the description of the same configuration as that of the first embodiment will be omitted, and only the configuration of the pallet 9 will be described.
  • a contact portion 9b that comes into contact with the speed reducing device 3 is provided at the front end portion of the pallet body portion 9a in the transport direction.
  • the contact inclined surface 9c is an inclined surface that inclines in a direction away from the speed reducing device 3 toward the downstream side in the transport direction.
  • the protruding portion 9d of the pallet 9 separates the adjacent pallet 9 from the pallet main body portion 9a.
  • the protruding portion 9d protrudes from the front end portion of the pallet main body portion 9a in the transport direction toward the downstream side in the transport direction. That is, the protruding portion 9d protrudes from the front end portion of the contact portion 9b in the transport direction toward the downstream side in the transport direction.
  • the protruding portion 9d comes into contact with the rear end portion of the other pallet 9 adjacent to the downstream side in the transport direction of the pallet 9.
  • the protruding portion 9d separates another pallet 9 adjacent to the downstream side in the transport direction of the pallet 9 from the contact portion 9b of the pallet 9.
  • an insertion portion 9e having a gap into which the deceleration portion 3a of the deceleration device 3 can be inserted is configured at the front end portion of the pallet 9 in the transport direction.
  • the insertion portion 9e is composed of a contact portion 9b and a protrusion portion 9d.
  • the pallet 9 configured in this way has a contact inclined surface 9c which is a part of the contact portion 9b at the front end portion of the pallet main body portion 9a in the transport direction. Further, the pallet 9 has a protruding portion 9d which is a part of the inserting portion 9e at the front end portion of the contact portion 9b in the transport direction.
  • the protruding portion 9d provided at the front end of the pallet 9 in the transport direction is the other on the downstream side of the pallet 9 in the transport direction. It comes into contact with the pallet body 9a of the pallet 9.
  • the rear end portion of the pallet 9 in the transport direction is on the protruding portion 9d of the other pallet 9 on the upstream side of the pallet 9 in the transport direction.
  • the insertion portion 9e is located on the downstream side of the contact portion 9b in the transport direction.
  • the deceleration portion 3a of the deceleration device 3 is inserted into the insertion portion 9e of the pallet 9 from below the conveyor 2 by the urging force of the urging portion 3b. That is, the deceleration unit 3a is located on the downstream side of the contact portion 9b of the pallet 9 in the transport direction.
  • the pallet 9 is provided with the insertion portion 9e at the front end portion of the contact portion 9b in the transport direction, so that even if the other pallets 9 are continuously located on the downstream side in the transport direction, the transport direction of the contact portion 9b
  • FIG. 11 shows a schematic configuration of the pallet 10 of the pallet transfer system 1B according to the third embodiment.
  • the pallet 10 has protrusions at the front end portion in the transport direction and the rear end portion in the transport direction of the pallet body portion 10a.
  • the pallet 10 has a pallet main body portion 10a, a contact portion 10b, a front protruding portion 10d, and a rear protruding portion 10f.
  • the front protruding portion 10d separates the other pallets 10 that are continuously located on the downstream side of the pallet 10 in the transport direction from the pallet main body portion 10a.
  • the front projecting portion 10d projects from the front end portion of the pallet body portion 10a in the transport direction toward the downstream side in the transport direction. That is, the front protruding portion 10d protrudes from the front end portion of the contact portion 10b of the pallet 10 toward the downstream side in the transport direction.
  • the front protruding portion 10d comes into contact with the rear end portion of the other pallet 10 adjacent to the downstream side in the transport direction of the pallet 10.
  • the front protruding portion 10d separates another pallet 10 adjacent to the downstream side in the transport direction of the pallet 10 from the contact portion 10b of the pallet 10.
  • a gap is created between the contact portion 10b of the pallet 10 and the other pallet 10 adjacent to the downstream side in the transport direction. That is, a front insertion portion 10e having a gap into which the deceleration portion 3a of the deceleration device 3 can be inserted is configured at the front end portion of the pallet 10 in the transport direction.
  • the front insertion portion 10e is composed of a contact portion 10b and a front protrusion portion 10d.
  • the rear protruding portion 10f separates another pallet 10 located continuously on the upstream side of the pallet 10 in the transport direction from the pallet main body portion 10a.
  • the rear protruding portion 10f protrudes from the rear end portion of the pallet main body portion 10a in the transport direction toward the upstream side in the transport direction.
  • the rear protruding portion 10f comes into contact with the rear end portion in the transport direction of another pallet 10 located continuously on the upstream side of the pallet 10 in the transport direction.
  • the rear protruding portion 10f separates the other pallet 10 adjacent to the upstream side of the pallet 10 in the transport direction from the pallet main body portion 10a. As a result, a gap is created between the pallet main body 10a and the other pallets 10 adjacent to the upstream side in the transport direction.
  • a rear insertion portion 10g having a gap into which the deceleration portion 3a of the speed reduction device 3 can be inserted is configured.
  • the rear insertion portion 10g is composed of a pallet body portion 10a and a rear protrusion portion 10f.
  • the pallet 10 configured in this way has a front protruding portion 10d which is a part of the front insertion portion 10e at the front end portion of the contact portion 10b in the transport direction. Further, the pallet 10 has a rear protruding portion 10f which is a part of the rear insertion portion 10g at the rear end portion of the pallet main body portion 10a in the transport direction.
  • the front protruding portion 10d provided at the front end portion of the pallet 10 in the transport direction is the other pallet on the downstream side of the pallet 10 in the transport direction. It comes into contact with the rear protrusion 10f of 10.
  • the pallet 10 is configured with the front insertion portion 10e from the front protrusion 10d provided at the front end of the contact portion 10b in the transport direction and the rear protrusion 10f of the other pallets 10. Further, the pallet 10 is configured with a rear insertion portion 10g from a rear protrusion 10f provided at the rear end of the pallet body 10a in the transport direction and a front protrusion 10d of another pallet 10.
  • the deceleration portion 3a of the deceleration device 3 is inserted into the front insertion portion 10e of the pallet 10 from below the conveyor 2 by the urging force of the urging portion 3b. That is, the deceleration unit 3a is located on the downstream side of the contact portion 10b of the pallet 10 in the transport direction.
  • the pallet 10 is provided with the front insertion portion 10e at the front end portion of the contact portion 10b in the transport direction, so that the contact portion 10b can be transported even if the other pallets 10 are continuously located on the downstream side in the transport direction.
  • a space for arranging the deceleration unit 3a of the deceleration device 3 is provided on the downstream side in the direction.
  • the pallet transfer systems 1 and 1A include the pallets 7 and 9 having the mounting table Mb on which the conveyed object M can be placed, the conveyor 2 having the conveying surface 2a for conveying the pallets 7 and 9, and the pallet 7.
  • a deceleration unit 3a that comes into contact with the deceleration unit 9 and an urging unit 3b that urges the deceleration unit 3a toward the pallets 7 and 9 are provided.
  • the plurality of pallets 7 and 9 have contact portions 7b and 9b that come into contact with the deceleration portion 3a of the deceleration device 3, protrusions 7d and 9d, and insertion portions 7e and 9e into which the deceleration portion 3a is inserted.
  • the protruding portion 7d is located at the front end portion of the contact portion 7b in the transport direction.
  • the protruding portion 9d is located at the rear end portion of the pallet main body portion 9a in the transport direction.
  • the insertion portion 9e of the pallet 10 is from a protruding portion 9d protruding from the front end portion in the transport direction of the contact portion 10b toward the downstream side in the transport direction, or from the rear end portion in the transport direction of the pallet body portion 10a including the mounting table Mb. It has at least one protruding portion 9d of the protruding portion 9d that protrudes toward the upstream side in the transport direction.
  • the deceleration portion 3a of the speed reducer 3 can be arranged on the downstream side of the contact portion 7b in the transport direction. Further, the pallet 7 having the insertion portion 7e at the front end portion in the transport direction of the contact portion 7b, the pallet 9 having the insertion portion 9e at the rear end portion in the transport direction of the pallet body portion 9a, and the front insertion portion 10e at the front end portion in the transport direction.
  • the deceleration portion 3a is located downstream of the contact portions 7b, 9b and 10b in the transport direction even if other pallets are lined up without a gap in the transport direction. Can be placed.
  • the contact portions 7b, 9b and 10b are moved in the transport direction by the conveyor 2, they come into contact with the deceleration portions 3a inserted into the insertion portions 7e, 9e and 10e.
  • the pallets 7, 9, and 10 sandwiched between the front and rear pallets can be decelerated by the deceleration unit 3a.
  • the pallet 7 has a protruding portion 7d at the front end portion of the contact portion 7b in the transport direction, so that a space for inserting the deceleration portion 3a of the speed reduction device 3 is provided on the downstream side of the contact portion 7b in the transport direction. ..
  • the pallet 9 has a protruding portion 9d at the rear end portion in the transport direction of the pallet main body portion 9a including the mounting table Mb, so that the pallet 9 is downstream of the contact portion 9b in the other pallet 9 on the upstream side of the pallet 9 in the transport direction. It has a space on the side for inserting the deceleration unit 3a. As a result, the pallets 7 and 9 sandwiched between the front and rear pallets can be decelerated.
  • the pallet transfer systems 1, 1A and 1B may be provided with speed reducing devices 3 on both sides of the conveyor 2 in the width direction.
  • FIG. 12 is a schematic plan view showing another embodiment of the pallet in the pallet transfer system 1, 1A, 1B according to the present invention.
  • the pallet transfer systems 1, 1A and 1B include, for example, a left speed reduction device 3A and a right speed reduction device 3B.
  • the decelerating portions 3Aa and 3Ba of the left and right decelerating devices 3A and 3B are located so as to be movable in the width direction of the conveyor 2.
  • the pallet 11 is provided with a left contact portion 11Ab and a right contact portion 11Bb on both the left and right sides in a plan view of the pallet main body portion 11a.
  • the protruding portion 11d separates the pallet connected from the pallet main body portion 11a.
  • the protruding portion 11d protrudes from the front end portion of the pallet main body portion 11a in the transport direction toward the downstream side in the transport direction.
  • the protruding portion 11d protrudes with a width narrower than the width of the pallet main body portion 11a in the left-right direction.
  • a left contact portion 11Ab that comes into contact with the left speed reducing device 3A is provided at the left end portion of the pallet body portion 11a in the transport direction.
  • a right contact portion 11Bb that comes into contact with the right speed reducing device 3B is provided at the front end portion in the transport direction of the pallet body portion 11a in the right direction.
  • the left contact inclined surface 11Ac of the left contact portion 11Ab is an inclined surface that inclines in a direction away from the left speed reducing device 3A toward the downstream side in the transport direction.
  • the right contact inclined surface 11Bc of the right contact portion 11Bb is an inclined surface that inclines in a direction away from the right speed reducing device 3B toward the downstream side in the transport direction.
  • the left contact portion 11Ab protrudes to the left from the left end portion of the protruding portion 11d.
  • the right contact portion 11Bb protrudes to the right from the right end portion of the protruding portion 11d.
  • a left insertion portion 11Ae into which the left deceleration portion 3Aa of the left deceleration device 3A can be inserted is configured on the downstream side of the left contact portion 11Ab in the transport direction and on the left side of the left end of the protrusion 11d.
  • a right insertion portion 11Be into which the right deceleration portion 3Ba of the right deceleration device 3B can be inserted is configured.
  • FIG. 13 shows a schematic configuration of the pallet transfer system 1C according to the fourth embodiment.
  • the pallet 12 of the pallet transfer system 1C has a contact portion wheel 12c at the contact portion 12b.
  • the speed reducing device 13 of the pallet transfer system 1C has a speed reducing portion inclined surface 13c.
  • a contact portion 12b that comes into contact with the speed reducing device 13 is provided at the front end portion of the pallet body 12a of the pallet 12 in the transport direction.
  • the contact portion 12b has a contact portion wheel 12c.
  • the contact portion wheel 12c is provided at the front end portion of the pallet body portion 12a in the transport direction.
  • the contact wheel 12c is configured to be rotatable in the transport direction.
  • the deceleration unit 13a of the deceleration device 13 is a member having a deceleration unit inclined surface 13c.
  • the deceleration unit 13a is located below the conveyor 2 with the deceleration unit inclined surface 13c facing upward and upstream in the transport direction.
  • the deceleration unit 13a is configured to be movable in a direction perpendicular to the transport direction of the pallet 12.
  • the deceleration unit 13a is configured to be movable in a direction perpendicular to the transport direction of the pallet 12 and in a direction perpendicular to the transport surface 2a of the conveyor 2.
  • the deceleration portion inclined surface 13c of the deceleration portion 13a is an inclined surface that inclines toward the pallet 12 toward the downstream side in the transport direction of the conveyor 2.
  • the contact portion wheel 12c of the pallet 12 comes into contact with the deceleration portion inclined surface 13c of the deceleration portion 13a.
  • the deceleration unit 13a pushes the contact portion wheel 12c of the contact portion 12b vertically and upward in the transport direction.
  • the contact portion wheel 12c of the contact portion 12b is parallel to the deceleration portion inclined surface 13c of the deceleration portion 13a and in the inclined surface direction toward the upstream side in the transport direction as a component of the force transmitted from the deceleration portion 13a of the deceleration device 3.
  • a reaction force and a vertical component force in the direction perpendicular to the deceleration portion inclined surface 13c are generated.
  • the pallet 12 is decelerated by the reaction force in the inclined surface direction transmitted from the decelerating portion 13a and the vertical component force in the direction perpendicular to the decelerating portion inclined surface 13c.
  • the pallet transfer system 1C configured as described above has a contact portion wheel 12c at the contact portion 12b of the pallet 12. Since the contact portion wheel 12c comes into contact with the deceleration portion 13a of the deceleration device 13 while rotating, a large deceleration force due to friction does not occur when the deceleration portion 13a comes into contact with the contact portion 12b. As a result, even if the plurality of pallets 12 are conveyed side by side without gaps, the pallets 12 sandwiched between the front and rear pallets can be decelerated without disturbing the arrangement of the plurality of pallets 12.
  • FIG. 14 shows a side view of the pallet transfer system 1D according to the fifth embodiment.
  • the pallet 14 has an acceleration inclined surface 14e at the rear end of the pallet body 14a in the transport direction.
  • a contact portion 14b that comes into contact with the speed reducing device 3 is provided at the front end portion of the pallet body portion 14a in the transport direction.
  • the contact inclined surface 14c is an inclined surface that inclines in a direction away from the speed reducing device 3 toward the downstream side in the transport direction.
  • the protruding portion 14d separates the pallet 14 adjacent to the pallet main body portion 14a.
  • the protruding portion 14d protrudes from the rear end portion of the pallet main body portion 14a in the transport direction toward the upstream side in the transport direction.
  • the protruding portion 14d comes into contact with the rear end portion of the pallet 14 in the transport direction of another pallet adjacent to the upstream side in the transport direction.
  • the protruding portion 14d is provided with an acceleration inclined surface 14e that comes into contact with the speed reducing device 3.
  • the acceleration inclined surface 14e is an inclined surface that inclines in a direction away from the speed reducing device 3 toward the upstream side in the transport direction. That is, the rear end portion of the pallet main body portion 14a in the transport direction is provided with an acceleration inclined surface 14e that goes upward from the lower surface of the pallet main body portion 14a toward the upstream side in the transport direction.
  • the pallet 14 configured in this way pushes the deceleration portion 3a down to the lower limit position by the contact inclined surface 14c of the contact portion 14b. Further, the pallet 14 pushes the deceleration portion 3a down to the lower limit position by the bottom surface of the pallet main body portion 14a provided at the upstream end of the contact inclined surface 14c in the transport direction.
  • the pallet 14 is conveyed to the downstream side in the conveying direction with the deceleration portion 3a pushed down to the lower limit position by the bottom surface of the pallet main body portion 14a.
  • the acceleration inclined surface 14e of the pallet 14 is further conveyed to the downstream side in the conveying direction, the acceleration inclined surface 14e comes into contact with the deceleration portion 3a.
  • the deceleration unit 3a pushes the contact inclined surface 14c of the contact portion 14b vertically and upward in the transport direction.
  • a reaction force and a vertical component force in the direction perpendicular to the acceleration inclined surface 14e are generated.
  • the pallet 14 is accelerated by the reaction force in the inclined surface direction and the component force in the vertical direction transmitted from the deceleration unit 3a.
  • the amount of pushing down of the deceleration portion 3a by the acceleration inclined surface 14e decreases as the pallet 14 is transported to the downstream side in the transport direction.
  • the force transmitted from the deceleration unit 3a decreases as the pallet 14 is transported to the downstream side in the transport direction.
  • the reaction force in the inclined surface direction and the component force in the vertical direction transmitted from the deceleration unit 3a decrease as the pallet 14 is transported to the downstream side in the transport direction. That is, the pallet 14 is accelerated at an acceleration that decreases at a constant rate as it is transported to the downstream side in the transport direction.
  • the pallet 14 is conveyed to the downstream side in the transport direction, and the deceleration portion 3a of the speed reducer 3 comes into contact with the acceleration inclined surface 14e, so that the reaction force in the inclined surface direction toward the downstream side in the transport direction is perpendicular to the pallet 14.
  • a component force is generated.
  • the pallet 14 is accelerated by the reaction force in the inclined surface direction and the component force in the vertical direction toward the downstream side in the transport direction while the deceleration portion 3a is in contact with the accelerating inclined surface 14e and is moving on the accelerating inclined surface 14e.
  • the pallet 14 is accelerated at an acceleration that decreases at a constant rate as it is transported to the downstream side in the transport direction.
  • the accelerated pallet 14 is separated from the pallet 14 on the upstream side of the pallet 14. As a result, the upstream pallet 14 can be decelerated without being affected by the downstream pallet 14.
  • the present invention has a mounting table on which a transported object can be placed, and is applicable to a pallet and a pallet transport system transported by a conveyor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Conveyors (AREA)
  • Special Conveying (AREA)

Abstract

Provided are a pallet and a pallet conveyance system which make it possible to reduce speed even when other pallets are continuously positioned in front and behind in the conveyance direction. A pallet 7 has a placement base on which a conveyance object M can be placed, and is conveyed by a conveyor 2. The pallet 7 has: a contact part 7b which makes contact with a speed-reducing device 3 that reduces the speed of the pallet 7; and an insertion part 7e into which the speed-reducing device 3 is inserted. The insertion part 7e is located in at least one of the front end part of the contact part 7b in the conveyance direction and the rear end part of a pallet body part 7a, which has the placement base, in the conveyance direction.

Description

パレット及びパレット搬送システムPallet and pallet transfer system
　本発明は、パレット及びパレット搬送システムに関する。 The present invention relates to a pallet and a pallet transfer system.
　搬送物を載置可能な載置台を有し、コンベアによって搬送されるパレットが知られている。パレットは、コンベアによって所定位置まで搬送されるとストッパ等で停止される。このようなパレットにおいて、ストッパ等に接触した際の衝撃を抑制し、且つストッパからの跳ね返りを防止するパレットが開示されている。例えば、特許文献１には、進行方向の前部に、傾斜部と位置決め用凹部とが隣り合って位置しているパレットと、コンベアの搬送面に平行な方向に揺動自在に構成される停止用位置決めローラとを備えたパレットの減速停止装置が開示されている。前記停止用位置決めローラは、弾性体によって揺動方向に付勢される。 A pallet that has a mounting table on which a transported object can be placed and is transported by a conveyor is known. When the pallet is conveyed to a predetermined position by the conveyor, it is stopped by a stopper or the like. In such a pallet, there is disclosed a pallet that suppresses an impact when it comes into contact with a stopper or the like and prevents rebound from the stopper. For example, in Patent Document 1, a pallet in which an inclined portion and a positioning recess are located adjacent to each other in the front portion in the traveling direction and a stop configured to swing in a direction parallel to the transport surface of the conveyor. A pallet deceleration stop device with a positioning roller for use is disclosed. The stop positioning roller is urged in the swing direction by an elastic body.
　前記特許文献１に記載のパレットの減速停止装置では、前記パレットは、コンベア上の所定位置で前記傾斜部に前記停止用位置決めローラが接触する。前記パレットは、前記コンベアによって進行方向に移動すると、前記傾斜部によって前記停止用位置決めローラを揺動させる。前記コンベアは、前記停止用位置決めローラの付勢力によって減速される。前記パレットは、前記コンベアによって更に進行方向に移動すると、前記位置決め用凹部に前記停止用位置決めローラが係合される。このようにして前記パレットは、前記停止用位置決めローラによって減速停止される。 In the pallet deceleration / stopping device described in Patent Document 1, the pallet has the stopping positioning roller in contact with the inclined portion at a predetermined position on the conveyor. When the pallet is moved in the traveling direction by the conveyor, the inclined portion causes the stopping positioning roller to swing. The conveyor is decelerated by the urging force of the stopping positioning roller. When the pallet is further moved in the traveling direction by the conveyor, the stopping positioning roller is engaged with the positioning recess. In this way, the pallet is decelerated and stopped by the stopping positioning roller.
特開２０００－６９７２３号公報Japanese Unexamined Patent Publication No. 2000-69723
　ところで、上述の特許文献１に開示されている減速停止装置では、前記停止用位置決めローラを前記コンベアの搬送面から突出させた状態で前記パレットの前方から前記パレットの傾斜部に接触させている。つまり、前記減速停止装置では、前記パレットを減速停止させる際、前記パレットの前方且つ前記コンベアの搬送面よりも上に前記停止用位置決めローラが位置する。従って、前記減速停止装置は、減速させるパレットの前後に他のパレットが連なって位置する場合、前記減速させるパレットの前方且つ前記コンベアの搬送面よりも上に前記停止用位置決めローラを配置することができない。 By the way, in the deceleration / stopping device disclosed in Patent Document 1 described above, the stopping positioning roller is brought into contact with the inclined portion of the pallet from the front of the pallet in a state of being projected from the transport surface of the conveyor. That is, in the deceleration stop device, when the pallet is decelerated and stopped, the stop positioning roller is located in front of the pallet and above the transport surface of the conveyor. Therefore, in the deceleration / stopping device, when other pallets are arranged in a row before and after the pallet to be decelerated, the stopping positioning roller may be arranged in front of the pallet to be decelerated and above the transport surface of the conveyor. Can not.
　本発明の目的は、搬送方向の前後に他のパレットが連なって位置していても減速させることができるパレット及びパレット搬送システムを提供することにある。 An object of the present invention is to provide a pallet and a pallet transport system capable of decelerating even if other pallets are arranged in a row before and after the transport direction.
　本発明の一実施形態に係るパレットは、搬送物を載置可能な載置台を有し、コンベアで搬送されるパレットである。このパレットは、前記パレットを減速させる減速装置が接触する接触部と、前記減速装置が挿入される挿入部と、を有し、前記挿入部は、前記接触部の搬送方向前端部または前記載置台の搬送方向後端部の少なくとも一方に位置する。 The pallet according to the embodiment of the present invention is a pallet that has a mounting table on which a conveyed object can be placed and is conveyed by a conveyor. This pallet has a contact portion with which the speed reducing device for decelerating the pallet comes into contact, and an insertion portion into which the speed reducing device is inserted. It is located at least one of the rear ends in the transport direction of.
　本発明の一実施形態に係るパレット搬送システムは、搬送物を載置可能な載置台を有するパレットと、前記パレットを搬送する搬送面を有するコンベアと、前記パレットに接触する減速部と、前記減速部を前記パレットに向かって付勢する付勢部と、を備える。前記パレットは、前記減速部に接触する接触部と、前記減速部が挿入される挿入部と、を有し、前記挿入部は、前接触部の搬送方向前端部または前記載置台の搬送方向後端部の少なくとも一方に位置する。 The pallet transport system according to the embodiment of the present invention includes a pallet having a mounting table on which a transported object can be placed, a conveyor having a transport surface for transporting the pallet, a deceleration unit in contact with the pallet, and the deceleration. It is provided with an urging portion that urges the portion toward the pallet. The pallet has a contact portion that comes into contact with the deceleration portion and an insertion portion into which the deceleration portion is inserted. Located on at least one of the ends.
　本発明の一実施形態に係るパレット及びパレット搬送システムによれば、搬送方向の前後に他のパレットが連なって位置してても減速させることができる。 According to the pallet and pallet transport system according to the embodiment of the present invention, deceleration can be performed even if other pallets are arranged in a row before and after the transport direction.
図１は、本発明の実施形態１に係るパレット搬送システムの概略構成を示す図である。FIG. 1 is a diagram showing a schematic configuration of a pallet transfer system according to the first embodiment of the present invention. 図２は、本発明の実施形態１に係るパレットの概略構成を示す側面図である。FIG. 2 is a side view showing a schematic configuration of a pallet according to the first embodiment of the present invention. 図３は、本発明の実施形態１に係るパレットの概略構成を示す平面図である。FIG. 3 is a plan view showing a schematic configuration of a pallet according to the first embodiment of the present invention. 図４は、本発明の実施形態１に係るパレット搬送システムにおいて作業位置と待機位置とにパレットが位置する状態を示す側面図である。FIG. 4 is a side view showing a state in which the pallet is located at the working position and the standby position in the pallet transport system according to the first embodiment of the present invention. 図５は、本発明の実施形態１に係るパレット搬送システムにおいて作業位置からパレットが搬出される状態を示す側面図である。FIG. 5 is a side view showing a state in which the pallet is carried out from the working position in the pallet transport system according to the first embodiment of the present invention. 図６は、本発明の実施形態１に係るパレット搬送システムにおいて作業位置から作業位置にパレットが搬送される状態を示す側面図である。FIG. 6 is a side view showing a state in which the pallet is transported from the working position to the working position in the pallet transport system according to the first embodiment of the present invention. 図７は、本発明の実施形態１に係るパレット搬送システムにおいて作業位置と待機位置とにパレットの配置が完了した状態を示す側面図である。FIG. 7 is a side view showing a state in which the arrangement of pallets is completed at the working position and the standby position in the pallet transport system according to the first embodiment of the present invention. 図８は、本発明の実施形態１に係るパレット搬送システムにおいて第１ストッパと第２ストッパの制御フローを示す図である。FIG. 8 is a diagram showing a control flow of the first stopper and the second stopper in the pallet transfer system according to the first embodiment of the present invention. 図９は、本発明の実施形態１に係るパレット７が減速装置に接触した際にパレット７に加わる力の状態を示す側面図である。FIG. 9 is a side view showing a state of a force applied to the pallet 7 when the pallet 7 according to the first embodiment of the present invention comes into contact with the speed reducing device. 図１０は、本発明の実施形態２に係るパレット搬送システムのパレット９の概略構成を示す側面図である。FIG. 10 is a side view showing a schematic configuration of a pallet 9 of the pallet transfer system according to the second embodiment of the present invention. 図１１は、本発明の実施形態３に係るパレット搬送システムのパレット１０の概略構成を示す側面図である。FIG. 11 is a side view showing a schematic configuration of a pallet 10 of the pallet transfer system according to the third embodiment of the present invention. 図１２は、本発明に係るパレット搬送システムにおけるパレットの別実施形態を示す平面図である。FIG. 12 is a plan view showing another embodiment of the pallet in the pallet transfer system according to the present invention. 図１３は、本発明の実施形態４に係るパレット搬送システムの概略構成を示す側面図である。FIG. 13 is a side view showing a schematic configuration of the pallet transfer system according to the fourth embodiment of the present invention. 図１４は、実施形態５に係るパレット搬送システムの概略構成を示す側面図である。FIG. 14 is a side view showing a schematic configuration of the pallet transfer system according to the fifth embodiment.
　以下、図面を参照し、本発明の実施の形態を詳しく説明する。なお、図中の同一または相当部分については同一の符号を付してその説明は繰り返さない。また、各図中の構成部材の寸法は、実際の構成部材の寸法及び各構成部材の寸法比率等を忠実に表したものではない。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals and the description thereof will not be repeated. Further, the dimensions of the constituent members in each drawing do not faithfully represent the dimensions of the actual constituent members and the dimensional ratio of each constituent member.
　なお、以下の説明において、パレット７の搬送方向（図１における白塗矢印）を「前方向」または「搬送方向の下流側」といい、パレット７の搬送方向とは反対方向を「後方向」または「搬送方向の上流側」という。また、パレット７上の搬送物Ｍから見て、搬送方向に対して左を、「左方向」といい、搬送方向に対して右を、「右方向」という。 In the following description, the transport direction of the pallet 7 (white arrow in FIG. 1) is referred to as "forward direction" or "downstream side of the transport direction", and the direction opposite to the transport direction of the pallet 7 is "rear direction". Or, it is called "upstream side in the transport direction". Further, when viewed from the conveyed object M on the pallet 7, the left side with respect to the conveyed direction is referred to as "left direction", and the right side with respect to the conveyed direction is referred to as "right direction".
　また、以下の説明において、“固定”、“接続”及び“取り付ける”等（以下、固定等）の表現は、部材同士が直接、固定等されている場合だけでなく、他の部材を介して固定等されている場合も含む。すなわち、以下の説明において、固定等の表現には、部材同士の直接的及び間接的な固定等の意味が含まれる。 Further, in the following description, the expressions such as "fixed", "connected" and "attached" (hereinafter referred to as "fixed") are used not only when the members are directly fixed to each other but also via other members. Including the case where it is fixed. That is, in the following description, the expression such as fixing includes the meaning of direct and indirect fixing between members.
　　［実施形態１］
　（パレット搬送システム１）
　図１は、本発明の実施形態１に係るパレット搬送システム１の概略構成を示す図である。図２は、本発明の実施形態１に係るパレット７の概略構成を示す側面図である。図３は、本発明の実施形態１に係るパレット７の概略構成を示す平面図である。パレット搬送システム１は、搬送物Ｍが載置されたパレット７を、コンベア２によって搬送するシステムである。パレット搬送システム１は、例えば、搬送物Ｍを検査する検査装置、搬送物Ｍを加工する加工装置などに用いられる。 [Embodiment 1]
(Pallet transfer system 1)
FIG. 1 is a diagram showing a schematic configuration of a pallet transfer system 1 according to the first embodiment of the present invention. FIG. 2 is a side view showing a schematic configuration of the pallet 7 according to the first embodiment of the present invention. FIG. 3 is a plan view showing a schematic configuration of the pallet 7 according to the first embodiment of the present invention. The pallet transfer system 1 is a system that conveys the pallet 7 on which the conveyed object M is placed by the conveyor 2. The pallet transfer system 1 is used, for example, as an inspection device for inspecting a transported object M, a processing device for processing a transported object M, and the like.
　パレット搬送システム１は、コンベア２と、減速装置３と、第１ストッパ４と、第２ストッパ５と、パレット押さえ部６と、複数のパレット７と、制御装置８とを有する。 The pallet transfer system 1 includes a conveyor 2, a speed reducing device 3, a first stopper 4, a second stopper 5, a pallet holding portion 6, a plurality of pallets 7, and a control device 8.
　コンベア２は、図示しない駆動機構によって一方向に移動可能である。コンベア２は、例えば、無端帯状のコンベアベルトである。コンベア２の上面は、複数のパレット７を搬送する搬送面２ａである。コンベア２は、複数のコンベアベルトを含む。コンベア２は、複数のコンベアベルトが広い所定の間隔で並んで位置する。 The conveyor 2 can move in one direction by a drive mechanism (not shown). The conveyor 2 is, for example, an endless band-shaped conveyor belt. The upper surface of the conveyor 2 is a conveyor surface 2a that conveys a plurality of pallets 7. The conveyor 2 includes a plurality of conveyor belts. The conveyor 2 has a plurality of conveyor belts arranged side by side at a wide predetermined interval.
　減速装置３は、パレット７を減速させる装置である。減速装置３は、パレット７に接触する減速部３ａと減速部３ａをパレット７の方向に付勢する付勢部３ｂとを具備する。減速装置３は、コンベア２の搬送面２ａよりも下方であってコンベア２の幅方向に少なくと
も一つ位置する。なお、減速装置３は、コンベア２の幅方向に並んで複数個所に設けられていてもよい。 The speed reducing device 3 is a device for decelerating the pallet 7. The speed reducing device 3 includes a deceleration unit 3a that comes into contact with the pallet 7 and an urging unit 3b that urges the deceleration unit 3a in the direction of the pallet 7. The speed reducing device 3 is located below the transport surface 2a of the conveyor 2 and at least one in the width direction of the conveyor 2. The speed reducing devices 3 may be provided at a plurality of locations side by side in the width direction of the conveyor 2.
　減速部３ａは、例えば、回転自在に支持される円筒状のローラと支持部材とから構成される。減速部３ａは、ローラを上方に向けた状態でコンベア２の下方に位置する。また、減速部３ａにおけるローラの回転方向は、コンベア２の搬送方向と同じである。減速部３ａは、パレット７の搬送方向に垂直な方向に移動可能に構成される。本実施形態において、減速部３ａは、パレット７の搬送方向に垂直な方向且つコンベア２の搬送面２ａに垂直な方向に移動可能に構成される。減速部３ａは、コンベア２の搬送面２ａから突出していない状態の下限位置から、コンベア２の搬送面２ａから突出している上限位置まで移動する。また、減速部３ａは、コンベア２を構成しているコンベアベルトとコンベアベルトとの間を上下方向に移動可能に位置する。つまり、減速部３ａは、上限位置においてコンベア２の幅方向の略中央から搬送面２ａよりも上方に突出する。 The deceleration unit 3a is composed of, for example, a cylindrical roller that is rotatably supported and a support member. The deceleration unit 3a is located below the conveyor 2 with the rollers facing upward. Further, the rotation direction of the rollers in the deceleration unit 3a is the same as the transport direction of the conveyor 2. The deceleration unit 3a is configured to be movable in a direction perpendicular to the transport direction of the pallet 7. In the present embodiment, the deceleration unit 3a is configured to be movable in a direction perpendicular to the transport direction of the pallet 7 and in a direction perpendicular to the transport surface 2a of the conveyor 2. The deceleration unit 3a moves from the lower limit position in a state where it does not protrude from the transport surface 2a of the conveyor 2 to the upper limit position where it protrudes from the transport surface 2a of the conveyor 2. Further, the deceleration unit 3a is located so as to be movable in the vertical direction between the conveyor belts constituting the conveyor 2 and the conveyor belts. That is, the deceleration unit 3a projects upward from the transport surface 2a from substantially the center in the width direction of the conveyor 2 at the upper limit position.
　付勢部３ｂは、例えば、圧縮ばねから構成される。付勢部３ｂは、減速部３ａをコンベアの搬送面２ａの方向に付勢する。本実施形態において、付勢部３ｂは、パレット７の搬送方向に垂直な方向且つコンベア２の搬送面２ａに垂直な方向に付勢している。これにより、減速部３ａは、付勢部３ｂの付勢力によってコンベア２の搬送面２ａよりも上方に突出した上限位置で維持される。また、減速部３ａは、コンベア２の搬送面２ａに向かって押されるとコンベア２の搬送面２ａに向かって移動する。 The urging portion 3b is composed of, for example, a compression spring. The urging unit 3b urges the deceleration unit 3a in the direction of the conveyor surface 2a. In the present embodiment, the urging portion 3b is urged in a direction perpendicular to the transport direction of the pallet 7 and in a direction perpendicular to the transport surface 2a of the conveyor 2. As a result, the deceleration unit 3a is maintained at the upper limit position protruding upward from the transport surface 2a of the conveyor 2 by the urging force of the urging unit 3b. Further, when the deceleration unit 3a is pushed toward the conveyor surface 2a of the conveyor 2, the deceleration unit 3a moves toward the conveyor surface 2a of the conveyor 2.
　第１ストッパ４は、コンベア２上に載せられたパレット７を、コンベア２に対して停止させるための部材である。第１ストッパ４は、パレット７をコンベア２上の作業位置Ｗｓで停止させる。作業位置Ｗｓは、パレット７に載置された搬送物Ｍに対して加工、組付け、検査等の作業を行う位置である。第１ストッパ４は、図示しない駆動機構によって、コンベア２の所定位置で上下移動する。第１ストッパ４は、コンベア２に対して、パレット７を作業位置Ｗｓで止められる作業停止位置ＳＰ１まで下降し、パレット７の作業位置Ｗｓからの移動を許容する場合には、パレット７の移動を阻害しない作業解除位置ＲＰ１まで上昇する。 The first stopper 4 is a member for stopping the pallet 7 mounted on the conveyor 2 with respect to the conveyor 2. The first stopper 4 stops the pallet 7 at the working position Ws on the conveyor 2. The working position Ws is a position where work such as processing, assembling, and inspection is performed on the conveyed object M placed on the pallet 7. The first stopper 4 moves up and down at a predetermined position on the conveyor 2 by a drive mechanism (not shown). When the first stopper 4 lowers the pallet 7 to the work stop position SP1 where the pallet 7 can be stopped at the work position Ws with respect to the conveyor 2, and allows the pallet 7 to move from the work position Ws, the first stopper 4 moves the pallet 7. It rises to the work release position RP1 which does not hinder.
　第２ストッパ５は、コンベア２上に載せられたパレット７を、コンベア２に対して停止させるための部材である。第２ストッパ５は、第１ストッパ４よりも上流に位置する。第２ストッパ５は、パレット７をコンベア２上の待機位置Ｓｓで停止させる。待機位置Ｓｓは、作業位置Ｗｓでの作業が完了するまで上流側のパレット７をコンベア２上で待機させる位置である。第２ストッパ５は、図示しない駆動機構によって、コンベア２の所定位置で上下移動する。ストッパ５は、コンベア２に対して、パレット７を待機位置Ｓｓで止められる待機停止位置ＳＰ２まで下降し、パレット７の待機位置Ｓｓからの移動を許容する場合には、パレット７の移動を阻害しない待機解除位置ＲＰ２まで上昇する。 The second stopper 5 is a member for stopping the pallet 7 mounted on the conveyor 2 with respect to the conveyor 2. The second stopper 5 is located upstream of the first stopper 4. The second stopper 5 stops the pallet 7 at the standby position Ss on the conveyor 2. The standby position Ss is a position where the pallet 7 on the upstream side is made to stand by on the conveyor 2 until the work at the work position Ws is completed. The second stopper 5 moves up and down at a predetermined position on the conveyor 2 by a drive mechanism (not shown). The stopper 5 does not hinder the movement of the pallet 7 when the pallet 7 is lowered to the standby stop position SP2 where the pallet 7 can be stopped at the standby position Ss with respect to the conveyor 2 and the movement of the pallet 7 from the standby position Ss is allowed. It rises to the standby release position RP2.
　パレット押さえ部６は、コンベア２上に載せられたパレット７の減速装置３による浮き上がりを防止する。パレット押さえ部６は、コンベア２の搬送面２ａの上方に位置する。パレット押さえ部６は、例えば、コンベア２の搬送面２ａに対向する位置に押さえローラを有している。パレット押さえ部６における押さえローラの回転方向は、コンベア２の搬送方向と同じである。また、パレット押さえ部６は、減速装置３の減速部３ａと対向する位置に位置する位置する。パレット押さえ部６は、コンベア２に上に載せられたパレット７がパレット押さえ部６の下方を通過する際に、押さえローラがパレット７の上面に接触する位置に位置する。つまり、パレット押さえ部６は、コンベア２上を搬送されるパレット７に減速部３ａが接触している間、パレット７に対する摩擦を抑制した状態でパレット７に接触することができる。 The pallet holding portion 6 prevents the pallet 7 mounted on the conveyor 2 from being lifted by the speed reducing device 3. The pallet holding portion 6 is located above the transport surface 2a of the conveyor 2. The pallet holding portion 6 has, for example, a holding roller at a position facing the transport surface 2a of the conveyor 2. The rotation direction of the holding roller in the pallet holding portion 6 is the same as the conveying direction of the conveyor 2. Further, the pallet holding portion 6 is located at a position facing the deceleration portion 3a of the deceleration device 3. The pallet holding portion 6 is located at a position where the holding roller comes into contact with the upper surface of the pallet 7 when the pallet 7 mounted on the conveyor 2 passes below the pallet holding portion 6. That is, the pallet holding portion 6 can come into contact with the pallet 7 while suppressing friction with the pallet 7 while the deceleration portion 3a is in contact with the pallet 7 conveyed on the conveyor 2.
　複数のパレット７は、搬送物Ｍを載置可能な載置台を有し、コンベア２で搬送される。複数のパレット７は、コンベア２上に、搬送方向に並んで位置する。複数のパレット７は、コンベア２上に載せられた状態で、コンベア２と共に搬送方向に移動する。よって、パレット７の搬送方向は、コンベア２の移動方向であり、コンベア２の搬送面２ａが延びる方向である。 The plurality of pallets 7 have a mounting table on which the conveyed object M can be placed, and are conveyed by the conveyor 2. The plurality of pallets 7 are located side by side on the conveyor 2 in the transport direction. The plurality of pallets 7 move in the transport direction together with the conveyor 2 while being mounted on the conveyor 2. Therefore, the transport direction of the pallet 7 is the moving direction of the conveyor 2, and is the direction in which the transport surface 2a of the conveyor 2 extends.
　図２及び図３に示すように、パレット７は、パレット本体部７ａと、接触部７ｂと、突出部７ｄと、を有する。パレット７は、例えば、エンジニアリングプラスチックから構成される。なお、バレットの材質は、エンジニアリングプラスチックに限定するものではない。 As shown in FIGS. 2 and 3, the pallet 7 has a pallet main body portion 7a, a contact portion 7b, and a protruding portion 7d. The pallet 7 is made of, for example, engineering plastic. The material of the bullet is not limited to engineering plastics.
　パレット本体部７ａは、搬送物Ｍを載置可能な平板状の部材である。パレット本体部７ａは、搬送物Ｍを載置する載置台を含む。本実施形態では、パレット本体部７ａは、平面視で矩形状である。バレット本体部は、コンベア２の搬送面２ａに載置される。パレット本体部７ａの上面には、搬送物Ｍの載置台Ｍｂが設けられている。 The pallet body 7a is a flat plate-shaped member on which the conveyed object M can be placed. The pallet main body 7a includes a mounting table on which the conveyed object M is placed. In the present embodiment, the pallet body 7a has a rectangular shape in a plan view. The valet main body is placed on the transport surface 2a of the conveyor 2. A mounting table Mb for the conveyed object M is provided on the upper surface of the pallet main body 7a.
　パレット本体部７ａの搬送方向前端部には、減速装置３と接触する接触部７ｂが設けられている。本実施形態では、接触部７ｂは、接触傾斜面７ｃを有している。接触傾斜面７ｃは、搬送方向の下流側に向かうにつれて減速装置３から離れる方向に傾斜する傾斜面である。つまり、パレット本体部７ａの搬送方向前端部には、搬送方向の下流側に向かうにつれてパレット本体部７ａの下面から上方向に向かう接触傾斜面７ｃを有している。 A contact portion 7b that comes into contact with the speed reducing device 3 is provided at the front end portion of the pallet body portion 7a in the transport direction. In the present embodiment, the contact portion 7b has a contact inclined surface 7c. The contact inclined surface 7c is an inclined surface that inclines in a direction away from the speed reducing device 3 toward the downstream side in the transport direction. That is, the front end portion of the pallet main body 7a in the transport direction has a contact inclined surface 7c that goes upward from the lower surface of the pallet main body 7a toward the downstream side in the transport direction.
　突出部７ｄは、パレット本体部７ａに対して隣接する他のパレット７を離隔させる。突出部７ｄは、パレット本体部７ａの搬送方向後端部から搬送方向の上流側に向かって突出している。突出部７ｄは、パレット７の搬送方向の上流側に隣接する他のパレット７の搬送方向前端部に接触する。突出部７ｄは、パレット７の搬送方向の上流側に隣接する他のパレット７の接触部７ｂとパレット本体部７ａとを離隔させる。これにより、パレット本体部７ａの搬送方向後端部とパレット７の搬送方向の上流側に隣接する他のパレット７の接触部７ｂとの間には、隙間が生じる。つまり、パレット７の搬送方向後端部には、減速装置３の減速部３ａを挿入可能な隙間を有する挿入部７ｅが構成される。挿入部７ｅは、パレット本体部７ａと突出部７ｄとから構成される。 The protruding portion 7d separates another pallet 7 adjacent to the pallet main body portion 7a. The protruding portion 7d protrudes from the rear end portion of the pallet main body portion 7a in the transport direction toward the upstream side in the transport direction. The protruding portion 7d comes into contact with the front end portion of the other pallet 7 adjacent to the upstream side in the transport direction of the pallet 7. The protruding portion 7d separates the contact portion 7b of another pallet 7 adjacent to the upstream side in the transport direction of the pallet 7 from the pallet main body portion 7a. As a result, a gap is created between the rear end of the pallet body 7a in the transport direction and the contact portion 7b of another pallet 7 adjacent to the upstream side of the pallet 7 in the transport direction. That is, at the rear end of the pallet 7 in the transport direction, an insertion portion 7e having a gap into which the deceleration portion 3a of the deceleration device 3 can be inserted is configured. The insertion portion 7e is composed of a pallet main body portion 7a and a protruding portion 7d.
　図２に示すように、このように構成されるパレット７は、搬送方向前端部に接触部７ｂに含まれる接触傾斜面７ｃを有している。また、パレット７は、搬送方向後端部に挿入部７ｅを有している。パレット７の搬送方向の下流側に他のパレット７が連なって位置する場合、パレット７の搬送方向前端部は、パレット７の搬送方向の下流側の他のパレット７の突出部７ｄに接触する。パレット７の搬送方向の上流側に他のパレット７が連なって位置する場合、パレット７の搬送方向後端部に設けられている突出部７ｄは、パレット７の搬送方向の上流側の他のパレット７の搬送方向前端部に接触する。 As shown in FIG. 2, the pallet 7 configured in this way has a contact inclined surface 7c included in the contact portion 7b at the front end portion in the transport direction. Further, the pallet 7 has an insertion portion 7e at the rear end portion in the transport direction. When the other pallets 7 are arranged in a row on the downstream side of the pallet 7 in the transport direction, the front end portion of the pallet 7 in the transport direction comes into contact with the protruding portion 7d of the other pallet 7 on the downstream side in the transport direction of the pallet 7. When another pallet 7 is continuously located on the upstream side of the pallet 7 in the transport direction, the protruding portion 7d provided at the rear end of the pallet 7 in the transport direction is the other pallet on the upstream side of the pallet 7 in the transport direction. 7 contacts the front end in the transport direction.
　パレット７の搬送方向の下流側に他のパレット７が連なって位置する場合、パレット７の搬送方向の下流側には、他のパレット７の挿入部７ｅが位置している。パレット７の搬送方向の上流側に他のパレット７が連なって位置する場合、他のパレット７の搬送方向の下流側には、パレット７の挿入部７ｅが位置している。このように、複数のパレット７は、搬送方向の上流側または搬送方向の下流側に他のパレット７が連なって位置していても、パレット７の搬送方向の下流側に挿入部７ｅが位置している。 When another pallet 7 is continuously located on the downstream side of the pallet 7 in the transport direction, the insertion portion 7e of the other pallet 7 is located on the downstream side of the pallet 7 in the transport direction. When another pallet 7 is continuously located on the upstream side of the pallet 7 in the transport direction, the insertion portion 7e of the pallet 7 is located on the downstream side of the other pallet 7 in the transport direction. In this way, even if the plurality of pallets 7 are located in a row on the upstream side in the transport direction or the downstream side in the transport direction, the insertion portion 7e is located on the downstream side in the transport direction of the pallets 7. ing.
　制御装置８は、第１ストッパ４と第２ストッパ５とを制御する装置である。制御装置８は、実質的には、ＣＰＵ、ＲＯＭ、ＲＡＭ、ＨＤＤ等がバスで接続される構成であってもよく、あるいはワンチップのＬＳＩ等からなる構成であってもよい。制御装置８は、第１ストッパ４と第２ストッパ５の動作を制御するために種々のプログラム及びデータが格納されている。 The control device 8 is a device that controls the first stopper 4 and the second stopper 5. The control device 8 may have a configuration in which a CPU, ROM, RAM, HDD, etc. are substantially connected by a bus, or may have a configuration including a one-chip LSI or the like. The control device 8 stores various programs and data for controlling the operation of the first stopper 4 and the second stopper 5.
　制御装置８は、第１ストッパ４の図示しない制御機構のアクチュエータと第２ストッパ５の図示しない制御機構のアクチュエータとに電気的に接続されている。制御装置８は、第１ストッパ４の制御機構のアクチュエータと第２ストッパ５の制御機構のアクチュエータとに制御信号を送信することができる。 The control device 8 is electrically connected to an actuator of a control mechanism (not shown) of the first stopper 4 and an actuator of a control mechanism (not shown) of the second stopper 5. The control device 8 can transmit a control signal to the actuator of the control mechanism of the first stopper 4 and the actuator of the control mechanism of the second stopper 5.
　制御装置８は、アクチュエータを制御して第１ストッパ４の位置を作業停止位置ＳＰ１と作業解除位置ＲＰ１とに切り替えることができる。また、制御装置８は、アクチュエータを制御して第２ストッパ５の位置を待機停止位置ＳＰ２と待機解除位置ＲＰ２とに切り替えることができる。制御装置８には、パレット７がコンベア２によって作業位置Ｗｓから搬出されるために必要な作業位置搬出時間Ｗｔが設定されている。また、制御装置８には、パレット７がコンベア２によって待機位置Ｓｓから搬出されるために必要な待機位置搬出時間Ｓｔが設定されている。 The control device 8 can control the actuator to switch the position of the first stopper 4 between the work stop position SP1 and the work release position RP1. Further, the control device 8 can control the actuator to switch the position of the second stopper 5 between the standby stop position SP2 and the standby release position RP2. The control device 8 is set with a work position carry-out time Wt required for the pallet 7 to be carried out from the work position Ws by the conveyor 2. Further, the control device 8 is set with a standby position carry-out time St required for the pallet 7 to be carried out from the standby position Ss by the conveyor 2.
　次に、パレット搬送システム１によるパレット７の搬送について説明する。図４は、パレット搬送システム１において作業位置Ｗｓと待機位置Ｓｓとにパレット７が配置される状態を示す側面図である。図５は、パレット搬送システム１において作業位置Ｗｓからパレット７が搬出される状態を示す側面図である。図６は、パレット搬送システム１において作業位置Ｗｓから作業位置Ｗｓにパレット７が搬送される状態を示す側面図である。図７は、パレット搬送システム１において作業位置Ｗｓと待機位置Ｓｓとにパレット７の配置が完了した状態を示す側面図である。図８は、パレット搬送システム１において第１ストッパ４と第２ストッパ５の制御フローを示す図である。 Next, the transfer of the pallet 7 by the pallet transfer system 1 will be described. FIG. 4 is a side view showing a state in which the pallet 7 is arranged at the working position Ws and the standby position Ss in the pallet transport system 1. FIG. 5 is a side view showing a state in which the pallet 7 is carried out from the working position Ws in the pallet transfer system 1. FIG. 6 is a side view showing a state in which the pallet 7 is transported from the working position Ws to the working position Ws in the pallet transport system 1. FIG. 7 is a side view showing a state in which the arrangement of the pallets 7 is completed at the working position Ws and the standby position Ss in the pallet transport system 1. FIG. 8 is a diagram showing a control flow of the first stopper 4 and the second stopper 5 in the pallet transfer system 1.
　なお、本実施形態において、第１ストッパ４は、作業停止位置ＳＰ１に切り替わっている状態を初期状態とする。また、第２ストッパ５は、待機停止位置ＳＰ２に切り替わっている状態を初期状態とする。本実施形態において、パレット搬送システム１は、複数のパレット７として、第１パレット７Ａ、第２パレット７Ｂ、第３パレット７Ｃ及び第４パレット７Ｄを有する。パレット搬送システム１は、コンベア２の搬送方向の下流側から上流側に第１パレット７Ａ、第２パレット７Ｂ、第３パレット７Ｃ及び第４パレット７Ｄの順に位置する。 In the present embodiment, the first stopper 4 is in a state of being switched to the work stop position SP1 as an initial state. Further, the second stopper 5 is in a state of being switched to the standby stop position SP2 as an initial state. In the present embodiment, the pallet transfer system 1 has a first pallet 7A, a second pallet 7B, a third pallet 7C, and a fourth pallet 7D as a plurality of pallets 7. The pallet transfer system 1 is located in the order of the first pallet 7A, the second pallet 7B, the third pallet 7C, and the fourth pallet 7D from the downstream side to the upstream side in the transfer direction of the conveyor 2.
　図４に示すように、コンベア２上の作業位置Ｗｓには、第１ストッパ４によって第１パレット７Ａが停止される。第１パレット７Ａは、作業位置Ｗｓに位置する。コンベア２上の待機位置Ｓｓには、第２ストッパ５によって第２パレット７Ｂが停止される。第２パレット７Ｂは、待機位置Ｓｓに位置する。第２パレット７Ｂの搬送方向の上流側には、第３パレット７Ｃが第２パレット７Ｂに連なって停止する。また、第３パレット７Ｃの搬送方向の上流側には、第４パレット７Ｄが第３パレット７Ｃに連なって停止する。 As shown in FIG. 4, the first pallet 7A is stopped by the first stopper 4 at the working position Ws on the conveyor 2. The first pallet 7A is located at the working position Ws. The second pallet 7B is stopped by the second stopper 5 at the standby position Ss on the conveyor 2. The second pallet 7B is located at the standby position Ss. On the upstream side of the second pallet 7B in the transport direction, the third pallet 7C is connected to the second pallet 7B and stopped. Further, on the upstream side of the third pallet 7C in the transport direction, the fourth pallet 7D is connected to the third pallet 7C and stopped.
　第３パレット７Ｃの搬送方向の下流側には、第２パレット７Ｂの挿入部７ｅが位置する。つまり、第３パレット７Ｃにおける接触部７ｂの搬送方向の下流側には、第２パレット７Ｂの挿入部７ｅが連なって位置する。同様に、第４パレット７Ｄにおける接触部７ｂの搬送方向の下流側には、第３パレット７Ｃの挿入部７ｅが連なって位置する。 The insertion portion 7e of the second pallet 7B is located on the downstream side of the third pallet 7C in the transport direction. That is, the insertion portion 7e of the second pallet 7B is continuously located on the downstream side of the contact portion 7b in the third pallet 7C in the transport direction. Similarly, the insertion portion 7e of the third pallet 7C is continuously located on the downstream side of the contact portion 7b in the fourth pallet 7D in the transport direction.
　パレット搬送システム１の減速装置３は、待機位置Ｓｓに停止されている第２パレット７Ｂの挿入部７ｅ近傍に位置する。減速装置３の減速部３ａは、付勢部３ｂの付勢力によってコンベア２の下方から第２パレット７Ｂの挿入部７ｅに挿入される。つまり、減速部３ａは、第３パレット７Ｃにおける接触部７ｂの搬送方向の下流側に位置する。この際、減速部３ａは、第３パレット７Ｃの接触部７ｂに接触していない。 The speed reducing device 3 of the pallet transfer system 1 is located near the insertion portion 7e of the second pallet 7B stopped at the standby position Ss. The deceleration portion 3a of the speed reduction device 3 is inserted into the insertion portion 7e of the second pallet 7B from below the conveyor 2 by the urging force of the urging portion 3b. That is, the deceleration unit 3a is located on the downstream side of the contact portion 7b in the third pallet 7C in the transport direction. At this time, the deceleration unit 3a is not in contact with the contact portion 7b of the third pallet 7C.
　図５から図８を用いて、制御装置８によるパレット７の搬送制御について説明する。　 The transfer control of the pallet 7 by the control device 8 will be described with reference to FIGS. 5 to 8. It was
　図８に示すように、ステップＳ１１０において、パレット搬送システム１の制御装置８は、作業位置Ｗｓにおいて第１パレット７Ａに載置された搬送物Ｍに対する作業が完了するまで、第１ストッパ４を作業停止位置ＳＰ１に切り替えた状態を維持する。同様に、制御装置８は、作業位置Ｗｓにおいて第１パレット７Ａに載置されている搬送物Ｍに対する作業が完了するまで、第２ストッパ５を待機停止位置ＳＰ２に切り替えた状態を維持する。 As shown in FIG. 8, in step S110, the control device 8 of the pallet transfer system 1 operates the first stopper 4 at the work position Ws until the operation on the conveyed object M placed on the first pallet 7A is completed. The state of switching to the stop position SP1 is maintained. Similarly, the control device 8 maintains a state in which the second stopper 5 is switched to the standby stop position SP2 until the work on the conveyed object M mounted on the first pallet 7A is completed at the working position Ws.
　図５と図８に示すように、ステップＳ１２０において、制御装置８は、作業位置Ｗｓにおいて第１パレット７Ａに載置された搬送物Ｍに対する作業が完了すると、第１ストッパ４を作業停止位置ＳＰ１から作業解除位置ＲＰ１に切り替える。ステップＳ１３０において、制御装置８は、第１ストッパ４を作業解除位置ＲＰ１に切り替えてから、第１パレット７Ａがコンベア２によって作業位置Ｗｓから搬出されるために必要な作業位置搬出時間Ｗｔが経過するまで第１ストッパ４を作業解除位置ＲＰ１に切り替えた状態を維持する。第１パレット７Ａは、コンベア２によって作業位置Ｗｓから搬出される。 As shown in FIGS. 5 and 8, in step S120, when the work on the conveyed object M placed on the first pallet 7A at the work position Ws is completed, the control device 8 sets the first stopper 4 at the work stop position SP1. Switch to the work release position RP1 from. In step S130, after the control device 8 switches the first stopper 4 to the work release position RP1, the work position carry-out time Wt required for the first pallet 7A to be carried out from the work position Ws by the conveyor 2 elapses. Until then, the state in which the first stopper 4 is switched to the work release position RP1 is maintained. The first pallet 7A is carried out from the working position Ws by the conveyor 2.
　図６と図８に示すように、ステップＳ１４０において、制御装置８は、作業位置搬出時間Ｗｔが経過した以降に第１ストッパ４を作業停止位置ＳＰ１に切り替える。 As shown in FIGS. 6 and 8, in step S140, the control device 8 switches the first stopper 4 to the work stop position SP1 after the work position carry-out time Wt has elapsed.
　図７と図８に示すように、ステップＳ１５０において、制御装置８は、第１ストッパ４が作業解除位置ＲＰ１に切り替わってから作業位置搬出時間Ｗｔが経過した以降の任意のタイミングで第２ストッパ５を待機停止位置ＳＰ２から待機解除位置ＲＰ２に切り替える。ステップＳ１６０において、制御装置８は、第２ストッパ５を待機解除位置ＲＰ２に切り替えてから、第２パレット７Ｂがコンベア２によって待機位置Ｓｓから搬出されるために必要な待機位置搬出時間Ｓｔが経過するまで第２ストッパ５を待機解除位置ＲＰ２に切り替えた状態を維持する。ステップＳ１７０において、制御装置８は、作業位置搬出時間Ｗｔが経過した以降に第２ストッパ５を待機停止位置ＳＰ２に切り替える。 As shown in FIGS. 7 and 8, in step S150, the control device 8 takes the second stopper 5 at an arbitrary timing after the work position carry-out time Wt has elapsed after the first stopper 4 is switched to the work release position RP1. Is switched from the standby stop position SP2 to the standby release position RP2. In step S160, after the control device 8 switches the second stopper 5 to the standby release position RP2, the standby position carry-out time St required for the second pallet 7B to be carried out from the standby position Ss by the conveyor 2 elapses. Until then, the state in which the second stopper 5 is switched to the standby release position RP2 is maintained. In step S170, the control device 8 switches the second stopper 5 to the standby stop position SP2 after the work position carry-out time Wt has elapsed.
　第２ストッパ５に停止されている第２パレット７Ｂは、第２ストッパ５が待機解除位置ＲＰ２に切り替わるとコンベア２によって作業位置Ｗｓに向かって搬出される。第２パレット７Ｂは、第１ストッパ４に接触するまで搬送方向の下流側に搬送される。第２パレット７Ｂは、第１ストッパ４に接触することで作業位置Ｗｓに位置する。 The second pallet 7B stopped at the second stopper 5 is carried out toward the working position Ws by the conveyor 2 when the second stopper 5 is switched to the standby release position RP2. The second pallet 7B is conveyed downstream in the conveying direction until it comes into contact with the first stopper 4. The second pallet 7B is located at the working position Ws by coming into contact with the first stopper 4.
　第２パレット７Ｂの搬送方向の上流側に連なって停止している第３パレット７Ｃは、第２パレット７Ｂが搬送方向の下流側に向かって搬送されると、第２パレット７Ｂに連なった状態で搬送方向の下流側に向かって搬送される。第３パレット７Ｃは、搬送方向の下流側に搬送されると、第３パレット７Ｃの搬送方向の下流側に位置する減速装置３の接触部７ｂに接触する。この結果、第３パレット７Ｃは、減速装置３によって減速される、つまり、第３パレット７Ｃの搬送速度は、搬送方向の下流側の第２パレット７Ｂの搬送速度よりも小さくなる。従って、第３パレット７Ｃは、第２パレット７Ｂから離隔する。 When the second pallet 7B is transported toward the downstream side in the transport direction, the third pallet 7C, which is stopped in a row on the upstream side of the second pallet 7B in the transport direction, is connected to the second pallet 7B. It is transported toward the downstream side in the transport direction. When the third pallet 7C is transported to the downstream side in the transport direction, the third pallet 7C comes into contact with the contact portion 7b of the speed reducing device 3 located on the downstream side in the transport direction of the third pallet 7C. As a result, the third pallet 7C is decelerated by the speed reducing device 3, that is, the transport speed of the third pallet 7C is smaller than the transport speed of the second pallet 7B on the downstream side in the transport direction. Therefore, the third pallet 7C is separated from the second pallet 7B.
　第２パレット７Ｂは、待機位置搬出時間Ｓｔが経過する間に、待機位置Ｓｓから作業位置Ｗｓまで搬送される。一方、第３パレット７Ｃは、減速装置３によって減速されているので、待機位置搬出時間Ｓｔが経過しても待機位置Ｓｓに到達していない。これにより、パレット搬送システム１は、第２ストッパ５を待機位置搬出時間Ｓｔが経過後に待機停止位置ＳＰ２に切り替えることで、第２パレット７Ｂと第３パレット７Ｃとの間に第２パレット７Ｂを挿入することができる。 The second pallet 7B is conveyed from the standby position Ss to the work position Ws while the standby position carry-out time St elapses. On the other hand, since the third pallet 7C is decelerated by the speed reducing device 3, the standby position Ss has not been reached even after the standby position carry-out time St has elapsed. As a result, the pallet transfer system 1 inserts the second pallet 7B between the second pallet 7B and the third pallet 7C by switching the second stopper 5 to the standby stop position SP2 after the standby position carry-out time St has elapsed. can do.
　第３パレット７Ｃは、減速装置３を通過すると、待機停止位置ＳＰ２に切り替えられている第２ストッパ５に接触することで待機位置Ｓｓに位置する。第３パレット７Ｃの搬送方向の上流側に連なっている第４パレット７Ｄは、第３パレット７Ｃに連なった状態で搬送方向の下流側に向かって搬送される。第３パレット７Ｃが第２ストッパ５に接触して待機位置Ｓｓに停止されると、第４パレット７Ｄは、第３パレット７Ｃの搬送方向の上流側に連なって停止される。 When the third pallet 7C passes through the speed reducing device 3, it comes into contact with the second stopper 5 which has been switched to the standby stop position SP2, and is located at the standby position Ss. The fourth pallet 7D connected to the upstream side in the transport direction of the third pallet 7C is transported toward the downstream side in the transport direction in a state of being connected to the third pallet 7C. When the third pallet 7C comes into contact with the second stopper 5 and is stopped at the standby position Ss, the fourth pallet 7D is continuously stopped on the upstream side in the transport direction of the third pallet 7C.
　このように構成されるパレット搬送システム１は、搬送物Ｍを載置可能な載置台を有する複数のパレット７である第１パレット７Ａ、第２パレット７Ｂ、第３パレット７Ｃ及び第４パレット７Ｄと、第１パレット７Ａ、第２パレット７Ｂ、第３パレット７Ｃ及び第４パレット７Ｄを搬送する搬送面２ａを有するコンベア２と、第１パレット７Ａ、第２パレット７Ｂ、第３パレット７Ｃ及び第４パレット７Ｄのうち一つのパレット７に接触する減速装置３の減速部３ａと、減速部３ａを一つのパレット７に向かって付勢する付勢部３ｂと、一つのパレット７を作業位置Ｗｓで停止させる作業停止位置ＳＰ１と一つのパレット７を作業位置Ｗｓから搬出させる作業解除位置ＲＰ１とに切り替わる第１ストッパ４と、一つのパレット７を減速部３ａの位置よりも搬送方向の下流側であって、作業位置Ｗｓよりも搬送方向の上流側に位置する待機位置Ｓｓで停止させる待機停止位置ＳＰ２と一つのパレット７を前記待機位置Ｓｓから搬出させる待機解除位置ＲＰ２とに切り替わる第２ストッパ５と、を備えている。 The pallet transfer system 1 configured as described above includes the first pallet 7A, the second pallet 7B, the third pallet 7C, and the fourth pallet 7D, which are a plurality of pallets 7 having a mounting table on which the conveyed object M can be placed. A conveyor 2 having a transport surface 2a for transporting the first pallet 7A, the second pallet 7B, the third pallet 7C and the fourth pallet 7D, and the first pallet 7A, the second pallet 7B, the third pallet 7C and the fourth pallet. The deceleration unit 3a of the deceleration device 3 that comes into contact with one of the pallets 7 of 7D, the urging unit 3b that urges the deceleration unit 3a toward one pallet 7, and one pallet 7 are stopped at the working position Ws. The first stopper 4 for switching the work stop position SP1 and the work release position RP1 for carrying out one pallet 7 from the work position Ws, and one pallet 7 on the downstream side in the transport direction from the position of the deceleration unit 3a. The standby stop position SP2 for stopping at the standby position Ss located on the upstream side of the work position Ws in the transport direction and the second stopper 5 for switching to the standby release position RP2 for carrying out one pallet 7 from the standby position Ss. I have.
　第１ストッパ４は、作業位置Ｗｓに停止されている第１パレット７Ａの搬送物Ｍに対する作業が終了すると、作業停止位置ＳＰ１から作業解除位置ＲＰ１に切り替わる。第１ストッパ４は、作業位置Ｗｓの第１パレット７Ａが作業位置Ｗｓから搬出されるために必要な作業位置搬出時間Ｗｔが経過した以降に、作業停止位置ＳＰ１に切り替わる。また、第２ストッパ５は、第１ストッパ４が作業解除位置ＲＰ１に切り替わってから作業位置搬出時間Ｗｔが経過した以降に、待機解除位置ＲＰ２に切り替わる。更に、第２ストッパ５は、待機位置Ｓｓに停止されている第２パレット７Ｂが待機位置Ｓｓから搬出されるために必要な待機位置搬出時間Ｓｔが経過すると、待機停止位置ＳＰ２に切り替わる。待機位置Ｓｓの第２パレット７Ｂよりも搬送方向の上流側の第３パレット７Ｃは、減速部３ａによって減速されながら待機位置Ｓｓに搬入される。 The first stopper 4 switches from the work stop position SP1 to the work release position RP1 when the work on the conveyed object M of the first pallet 7A stopped at the work position Ws is completed. The first stopper 4 switches to the work stop position SP1 after the work position carry-out time Wt required for the first pallet 7A at the work position Ws to be carried out from the work position Ws has elapsed. Further, the second stopper 5 is switched to the standby release position RP2 after the work position carry-out time Wt has elapsed after the first stopper 4 is switched to the work release position RP1. Further, the second stopper 5 switches to the standby stop position SP2 when the standby position carry-out time St required for the second pallet 7B stopped at the standby position Ss to be carried out from the standby position Ss elapses. The third pallet 7C on the upstream side of the second pallet 7B in the standby position Ss is carried into the standby position Ss while being decelerated by the deceleration unit 3a.
　パレット搬送システム１の第１ストッパ４は、第１パレット７Ａに対する作業位置Ｗｓでの作業が終了してから作業位置搬出時間Ｗｔが経過した以降に、作業解除位置ＲＰ１と作業停止位置ＳＰ１とに切り替わる。第２ストッパ５は、作業位置搬出時間Ｗｔが経過すると待機解除位置ＲＰ２に切り替わる。更に第２パレット７Ｂは、待機解除位置ＲＰ２に切り替わってから待機位置搬出時間Ｓｔが経過すると待機停止位置ＳＰ２に切り替わる。この際、待機位置Ｓｓの第２パレット７Ｂよりも上流側の第３パレット７Ｃ及び第４パレット７Ｄは、減速部３ａによって減速されるので、第２ストッパ５が待機停止位置ＳＰ２に切り替わった後に待機位置Ｓｓに停止される。これにより、パレット搬送システム１は、作業位置搬出時間Ｗｔと待機位置搬出時間Ｓｔとを基準に第１ストッパ４と第２ストッパ５との切り替えを行うことができる。 The first stopper 4 of the pallet transfer system 1 switches between the work release position RP1 and the work stop position SP1 after the work position carry-out time Wt has elapsed after the work at the work position Ws with respect to the first pallet 7A is completed. .. The second stopper 5 switches to the standby release position RP2 when the work position carry-out time Wt elapses. Further, the second pallet 7B is switched to the standby stop position SP2 when the standby position carry-out time St has elapsed after switching to the standby release position RP2. At this time, since the third pallet 7C and the fourth pallet 7D on the upstream side of the second pallet 7B in the standby position Ss are decelerated by the deceleration unit 3a, the second stopper 5 is switched to the standby stop position SP2 and then waits. Stopped at position Ss. As a result, the pallet transfer system 1 can switch between the first stopper 4 and the second stopper 5 based on the work position carry-out time Wt and the standby position carry-out time St.
　次に、図５から図８及び図９を用いて、上述のパレット搬送システム１において、減速装置３によるパレット７の減速について詳細に説明する。図９は、パレット７が減速装置３に接触した際にパレット７に加わる力の状態を示す側面図である。なお、本実施形態において、第２ストッパ５によって待機位置Ｓｓに停止している第２パレット７Ｂと、第２パレット７Ｂの搬送方向の上流側に連なって停止している第３パレット７Ｃについて説明を行う。 Next, the deceleration of the pallet 7 by the speed reducing device 3 in the above-mentioned pallet transport system 1 will be described in detail with reference to FIGS. 5 to 8 and 9. FIG. 9 is a side view showing the state of the force applied to the pallet 7 when the pallet 7 comes into contact with the speed reducing device 3. In this embodiment, the second pallet 7B stopped at the standby position Ss by the second stopper 5 and the third pallet 7C stopped in a row on the upstream side in the transport direction of the second pallet 7B will be described. conduct.
　図５に示すように、第３パレット７Ｃの搬送方向前端部には、第２パレット７Ｂの搬送方向後端部に設けられている挿入部７ｅが隣接して位置する。つまり、第３パレット７Ｃの搬送方向前端部に設けられている接触部７ｂの搬送方向の下流側には、第２パレット７Ｂの挿入部７ｅが隣接して位置する。第３パレット７Ｃの搬送方向後端部には、第４パレット７Ｄの搬送方向前端部に設けられている接触部７ｂが隣接して位置する。 As shown in FIG. 5, the insertion portion 7e provided at the rear end portion of the second pallet 7B in the transport direction is adjacent to the front end portion of the third pallet 7C in the transport direction. That is, the insertion portion 7e of the second pallet 7B is located adjacent to the downstream side of the contact portion 7b provided at the front end portion of the third pallet 7C in the transport direction in the transport direction. A contact portion 7b provided at the front end portion of the fourth pallet 7D in the transport direction is adjacent to the rear end portion of the third pallet 7C in the transport direction.
　第２パレット７Ｂの挿入部７ｅには、減速装置３の減速部３ａが付勢部３ｂの付勢力によってコンベア２の下方から挿入される。つまり、減速部３ａは、第３パレット７Ｃにおける接触部７ｂの搬送方向の下流側に位置する。このように、パレット７は、搬送方向前端部に接触部７ｂを設け、搬送方向後端部に挿入部７ｅを設けたることで、搬送方向の下流側に他のパレット７が連なって位置していても、接触部７ｂの搬送方向の下流側に減速装置３の減速部３ａを配置する空間を有している。 The deceleration section 3a of the speed reducer 3 is inserted into the insertion section 7e of the second pallet 7B from below the conveyor 2 by the urging force of the urging section 3b. That is, the deceleration unit 3a is located on the downstream side of the contact portion 7b in the third pallet 7C in the transport direction. As described above, the pallet 7 is provided with the contact portion 7b at the front end portion in the transport direction and the insertion portion 7e at the rear end portion in the transport direction, so that the other pallets 7 are continuously positioned on the downstream side in the transport direction. However, there is a space for arranging the deceleration portion 3a of the deceleration device 3 on the downstream side of the contact portion 7b in the transport direction.
　図６に示すように、第２ストッパ５に停止されている第２パレット７Ｂは、第２ストッパ５が待機解除位置ＲＰ２に切り替わるとコンベア２によって搬送方向の下流側に向かって搬出される。第２パレット７Ｂの搬送方向の上流側に連なって停止している第３パレット７Ｃは、第２パレット７Ｂが搬送方向の下流側に向かって搬送されると、第２パレット７Ｂに連なった状態で搬送方向の下流側に向かって搬送される。 As shown in FIG. 6, the second pallet 7B stopped at the second stopper 5 is carried out toward the downstream side in the transport direction by the conveyor 2 when the second stopper 5 is switched to the standby release position RP2. When the second pallet 7B is transported toward the downstream side in the transport direction, the third pallet 7C, which is stopped in a row on the upstream side of the second pallet 7B in the transport direction, is connected to the second pallet 7B. It is transported toward the downstream side in the transport direction.
　第３パレット７Ｃの接触部７ｂは、搬送方向の下流側に向かうにつれて減速装置３の減速部３ａから離れる方向に傾斜する接触傾斜面７ｃを有する。すなわち、接触部７ｂは、搬送方向の上流側に向かうにつれて減速部３ａに近づく方向に傾斜する接触傾斜面７ｃを有する。下流側の第２パレット７Ｂ及び上流側の第４パレット７Ｄとともに搬送方向の下流側に搬送されると、第３パレット７Ｃの接触部７ｂが減速部３ａに接触する。第３パレット７Ｃは、接触部７ｂの接触傾斜面７ｃによって減速部３ａを搬送方向の下流側に向かって押す。減速部３ａは、接触部７ｂの接触傾斜面７ｃによってコンベア２の搬送面２ａの方向に押し下げられる。 The contact portion 7b of the third pallet 7C has a contact inclined surface 7c that inclines in a direction away from the deceleration portion 3a of the speed reducer 3 toward the downstream side in the transport direction. That is, the contact portion 7b has a contact inclined surface 7c that inclines in a direction approaching the deceleration portion 3a toward the upstream side in the transport direction. When the second pallet 7B on the downstream side and the fourth pallet 7D on the upstream side are transported to the downstream side in the transport direction, the contact portion 7b of the third pallet 7C comes into contact with the deceleration portion 3a. The third pallet 7C pushes the deceleration portion 3a toward the downstream side in the transport direction by the contact inclined surface 7c of the contact portion 7b. The decelerating portion 3a is pushed down in the direction of the transport surface 2a of the conveyor 2 by the contact inclined surface 7c of the contact portion 7b.
　図９に示すように、減速装置３の付勢部３ｂは、減速部３ａの押し下げ量に比例して減速部３ａを押し上げる方向の付勢力を発生させる。減速部３ａは、接触部７ｂの接触傾斜面７ｃを搬送方向に垂直且つ上方向に力Ｆによって押す。第３パレット７Ｃの接触部７ｂの接触傾斜面７ｃには、減速装置３の減速部３ａから伝達される力Ｆの分力として、接触部７ｂの接触傾斜面７ｃに平行且つ搬送方向の下流側に向かう傾斜面方向分力Ｆ１と、接触傾斜面７ｃに垂直な方向の垂直方向分力Ｆ２とが生じる。垂直方向分力Ｆ２は、搬送方向の上流側に向かう分力である。従って、第３パレット７Ｃは、減速部３ａから伝達され
る力Ｆの分力である垂直方向分力Ｆ２によって減速される。 As shown in FIG. 9, the urging unit 3b of the speed reducing device 3 generates an urging force in the direction of pushing up the deceleration unit 3a in proportion to the pushing down amount of the deceleration unit 3a. The deceleration unit 3a pushes the contact inclined surface 7c of the contact portion 7b vertically and upward in the transport direction by the force F. The contact inclined surface 7c of the contact portion 7b of the third pallet 7C is parallel to the contact inclined surface 7c of the contact portion 7b and downstream in the transport direction as a component of the force F transmitted from the deceleration portion 3a of the speed reducing device 3. A component force F1 in the direction of the inclined surface and a component force F2 in the direction perpendicular to the contact inclined surface 7c are generated. The vertical component force F2 is a component force toward the upstream side in the transport direction. Therefore, the third pallet 7C is decelerated by the vertical component force F2, which is the component force of the force F transmitted from the deceleration unit 3a.
　第３パレット７Ｃは、搬送方向の下流側に搬送されるにつれて減速部３ａを接触傾斜面７ｃによって押し下げる。これにより、第３パレット７Ｃでは、搬送方向の下流側に搬送されるにつれて減速部３ａから伝達される力Ｆが増大する。同様に、第３パレット７Ｃでは、搬送方向の下流側に搬送されるにつれて減速部３ａから伝達される傾斜面方向分力Ｆ１と垂直方向分力Ｆ２とが増大する。つまり、第３パレット７Ｃは、搬送方向の下流側に搬送されるにつれて一定の割合で増加する減速度で減速される。 The third pallet 7C pushes down the deceleration portion 3a by the contact inclined surface 7c as it is transported to the downstream side in the transport direction. As a result, in the third pallet 7C, the force F transmitted from the deceleration unit 3a increases as the pallet is conveyed to the downstream side in the conveying direction. Similarly, in the third pallet 7C, the inclined surface direction component force F1 and the vertical direction component force F2 transmitted from the deceleration unit 3a increase as the pallet is conveyed to the downstream side in the transfer direction. That is, the third pallet 7C is decelerated at a deceleration rate that increases at a constant rate as it is transported to the downstream side in the transport direction.
　このように、第３パレット７Ｃは、搬送方向の下流側に搬送されながら接触傾斜面７ｃに減速装置３の減速部３ａが接触することで搬送方向の上流側に向かう垂直方向分力Ｆ２が生じる。第３パレット７Ｃは、接触傾斜面７ｃに減速部３ａが接触し、且つ接触傾斜面７ｃ上を移動している間、搬送方向の上流側に向かう垂直方向分力Ｆ２によって減速される。この際、第３パレット７Ｃは、搬送方向の下流側に搬送されるにつれて一定の割合で増加する減速度で減速される。また、減速部３ａを構成しているローラは、回転しながらパレット７の接触傾斜面７ｃに接触する。つまり、第３パレット７Ｃには、接触部７ｂが接触した際に摺動摩擦による減速力が生じない。これにより、パレット搬送システム１は、複数のパレット７が隙間なく並んで搬送されていても、複数のパレット７の並びを乱すことなく一つのパレット７を減速させることができる。 As described above, in the third pallet 7C, the deceleration portion 3a of the speed reducing device 3 comes into contact with the contact inclined surface 7c while being transported to the downstream side in the transport direction, so that a vertical component force F2 toward the upstream side in the transport direction is generated. .. The third pallet 7C is decelerated by the vertical component force F2 toward the upstream side in the transport direction while the deceleration portion 3a is in contact with the contact inclined surface 7c and is moving on the contact inclined surface 7c. At this time, the third pallet 7C is decelerated at a deceleration rate that increases at a constant rate as it is transported to the downstream side in the transport direction. Further, the rollers constituting the deceleration unit 3a come into contact with the contact inclined surface 7c of the pallet 7 while rotating. That is, the third pallet 7C does not generate a deceleration force due to sliding friction when the contact portion 7b comes into contact with the third pallet 7C. As a result, the pallet transfer system 1 can decelerate one pallet 7 without disturbing the arrangement of the plurality of pallets 7 even if the plurality of pallets 7 are conveyed side by side without gaps.
　また、第３パレット７Ｃは、コンベア２の搬送面２ａから離れる方向の分力である垂直方向分力Ｆ２が減速装置３の減速部３ａから伝達される。第３パレット７Ｃでは、搬送方向の下流側に搬送されるにつれて減速部３ａから伝達される垂直方向分力Ｆ２が増大する。減速部３ａが第３パレット７Ｃに接触している間、パレット押さえ部６のローラが第３パレット７Ｃの上面に接触する。つまり、第３パレット７Ｃは、減速部３ａから伝達される垂直方向分力Ｆ２が増大しても、パレット押さえ部６によってコンベア２の搬送面２ａから浮き上がり、姿勢の乱れ等が防止される。従って、第３パレット７Ｃでは、第３パレット７Ｃの浮き上がりによって垂直方向分力Ｆ２が分散することがない。 Further, in the third pallet 7C, the vertical component force F2, which is a component force in the direction away from the conveyor surface 2a of the conveyor 2, is transmitted from the deceleration unit 3a of the speed reducer 3. In the third pallet 7C, the vertical component force F2 transmitted from the deceleration unit 3a increases as the pallet is conveyed downstream in the conveying direction. While the deceleration portion 3a is in contact with the third pallet 7C, the roller of the pallet holding portion 6 is in contact with the upper surface of the third pallet 7C. That is, even if the vertical component force F2 transmitted from the deceleration unit 3a increases, the third pallet 7C is lifted from the transport surface 2a of the conveyor 2 by the pallet holding unit 6 to prevent the posture from being disturbed. Therefore, in the third pallet 7C, the vertical component force F2 is not dispersed due to the floating of the third pallet 7C.
　第３パレット７Ｃは、搬送方向の下流側への搬送により、接触部７ｂの接触傾斜面７ｃによって減速装置３の減速部３ａをコンベア２の搬送面２ａから突出していない状態である下限位置まで押し下げる。第３パレット７Ｃは、接触傾斜面７ｃの搬送方向上流側端に設けられているパレット本体部７ａの底面によって減速部３ａを下限位置に押し下げる。第３パレット７Ｃは、パレット本体部７ａの底面によって減速部３ａを下限位置に押し下げた状態で更に搬送方向の下流側へ搬送される。 The third pallet 7C pushes down the deceleration portion 3a of the speed reducer 3 to the lower limit position in a state where it does not protrude from the transport surface 2a of the conveyor 2 by the contact inclined surface 7c of the contact portion 7b by transporting to the downstream side in the transport direction. .. The third pallet 7C pushes the deceleration portion 3a down to the lower limit position by the bottom surface of the pallet main body portion 7a provided at the upstream end of the contact inclined surface 7c in the transport direction. The third pallet 7C is further conveyed to the downstream side in the conveying direction in a state where the deceleration portion 3a is pushed down to the lower limit position by the bottom surface of the pallet main body portion 7a.
　図７に示すように、第３パレット７Ｃでは、搬送方向の下流側へ搬送されると、パレット本体部７ａの搬送方向後端部に設けられている挿入部７ｅに減速部３ａが挿入される。第３パレット７Ｃの挿入部７ｅに挿入された減速装置３の減速部３ａは、第４パレット７Ｄの接触部７ｂにおける搬送方向の下流側に位置している。従って、第４パレット７Ｄの接触部７ｂは、搬送方向の下流側に搬送されると、減速部３ａに接触する。このように、第３パレット７Ｃの搬送方向後端部には、挿入部７ｅが設けられている。よって、位置する第４パレット７Ｄの接触部７ｂの搬送方向の下流側には、減速部３ａを挿入可能な第３パレット７Ｃの挿入部７ｅが位置している。 As shown in FIG. 7, in the third pallet 7C, when the pallet 7C is transported to the downstream side in the transport direction, the deceleration portion 3a is inserted into the insertion portion 7e provided at the rear end portion of the pallet body portion 7a in the transport direction. .. The deceleration unit 3a of the deceleration device 3 inserted into the insertion unit 7e of the third pallet 7C is located on the downstream side of the contact portion 7b of the fourth pallet 7D in the transport direction. Therefore, the contact portion 7b of the fourth pallet 7D comes into contact with the deceleration portion 3a when it is transported to the downstream side in the transport direction. As described above, the insertion portion 7e is provided at the rear end portion of the third pallet 7C in the transport direction. Therefore, the insertion portion 7e of the third pallet 7C into which the deceleration portion 3a can be inserted is located on the downstream side of the contact portion 7b of the fourth pallet 7D to be located in the transport direction.
　［実施形態２］
　以下に、実施形態２に係るパレット搬送システム１Ａについて説明する。図１０は、実施形態２に係るパレット搬送システム１Ａのパレット９の概略構成を示す。パレット９は、パレット本体部９ａの搬送方向前端部に突出部９ｄを有する。パレット搬送システム１Ａの構成は、パレット９を除いて実施形態１のパレット搬送システム１Ａの構成と同様である。よって、以下では、実施形態１と同様の構成については説明を省略し、パレット９の構成についてのみ説明する。 [Embodiment 2]
The pallet transfer system 1A according to the second embodiment will be described below. FIG. 10 shows a schematic configuration of the pallet 9 of the pallet transfer system 1A according to the second embodiment. The pallet 9 has a protruding portion 9d at the front end portion of the pallet main body portion 9a in the transport direction. The configuration of the pallet transfer system 1A is the same as the configuration of the pallet transfer system 1A of the first embodiment except for the pallet 9. Therefore, in the following, the description of the same configuration as that of the first embodiment will be omitted, and only the configuration of the pallet 9 will be described.
　パレット本体部９ａの搬送方向前端部には、減速装置３と接触する接触部９ｂが設けられている。接触傾斜面９ｃは、搬送方向の下流側に向かうにつれて減速装置３から離れる方向に傾斜する傾斜面である。 A contact portion 9b that comes into contact with the speed reducing device 3 is provided at the front end portion of the pallet body portion 9a in the transport direction. The contact inclined surface 9c is an inclined surface that inclines in a direction away from the speed reducing device 3 toward the downstream side in the transport direction.
　パレット９の突出部９ｄは、パレット本体部９ａに対して、隣接するパレット９を離隔させる。突出部９ｄは、パレット本体部９ａの搬送方向前端部から搬送方向の下流側に向かって突出している。つまり、突出部９ｄは、接触部９ｂの搬送方向前端部から搬送方向の下流側に向かって突出している。突出部９ｄは、パレット９の搬送方向の下流側に隣接する他のパレット９の搬送方向後端部に接触する。突出部９ｄは、パレット９の搬送方向の下流側に隣接する他のパレット９とパレット９の接触部９ｂとを離隔させる。これにより、接触部９ｂと搬送方向の下流側に隣接する他のパレット９との間には、隙間が生じている。つまり、パレット９の搬送方向前端部には、減速装置３の減速部３ａを挿入可能な隙間を有する挿入部９ｅが構成される。挿入部９ｅは、接触部９ｂと突出部９ｄとから構成される。 The protruding portion 9d of the pallet 9 separates the adjacent pallet 9 from the pallet main body portion 9a. The protruding portion 9d protrudes from the front end portion of the pallet main body portion 9a in the transport direction toward the downstream side in the transport direction. That is, the protruding portion 9d protrudes from the front end portion of the contact portion 9b in the transport direction toward the downstream side in the transport direction. The protruding portion 9d comes into contact with the rear end portion of the other pallet 9 adjacent to the downstream side in the transport direction of the pallet 9. The protruding portion 9d separates another pallet 9 adjacent to the downstream side in the transport direction of the pallet 9 from the contact portion 9b of the pallet 9. As a result, a gap is formed between the contact portion 9b and the other pallet 9 adjacent to the downstream side in the transport direction. That is, an insertion portion 9e having a gap into which the deceleration portion 3a of the deceleration device 3 can be inserted is configured at the front end portion of the pallet 9 in the transport direction. The insertion portion 9e is composed of a contact portion 9b and a protrusion portion 9d.
　このように構成されるパレット９は、パレット本体部９ａの搬送方向前端部に接触部９ｂの一部である接触傾斜面９ｃを有している。さらに、パレット９は、接触部９ｂの搬送方向前端部に挿入部９ｅの一部である突出部９ｄを有している。パレット９の搬送方向の下流側に他のパレット９が連なって位置する位置する場合、パレット９の搬送方向前端部に設けられている突出部９ｄは、パレット９の搬送方向の下流側の他のパレット９のパレット本体部９ａに接触する。パレット９の搬送方向の上流側に他のパレット９が連なって位置する位置する場合、パレット９の搬送方向後端部は、パレット９の搬送方向の上流側の他のパレット９の突出部９ｄに接触する。このように、パレット９は、接触部９ｂの搬送方向の下流側に挿入部９ｅが位置している。 The pallet 9 configured in this way has a contact inclined surface 9c which is a part of the contact portion 9b at the front end portion of the pallet main body portion 9a in the transport direction. Further, the pallet 9 has a protruding portion 9d which is a part of the inserting portion 9e at the front end portion of the contact portion 9b in the transport direction. When the other pallets 9 are located in a row on the downstream side of the pallet 9 in the transport direction, the protruding portion 9d provided at the front end of the pallet 9 in the transport direction is the other on the downstream side of the pallet 9 in the transport direction. It comes into contact with the pallet body 9a of the pallet 9. When the other pallets 9 are located on the upstream side of the pallet 9 in the transport direction in a row, the rear end portion of the pallet 9 in the transport direction is on the protruding portion 9d of the other pallet 9 on the upstream side of the pallet 9 in the transport direction. Contact. As described above, in the pallet 9, the insertion portion 9e is located on the downstream side of the contact portion 9b in the transport direction.
　パレット９の挿入部９ｅには、減速装置３の減速部３ａが付勢部３ｂの付勢力によってコンベア２の下方から挿入される。つまり、減速部３ａは、パレット９における接触部９ｂの搬送方向の下流側に位置する。このように、パレット９は、接触部９ｂの搬送方向前端部に挿入部９ｅを設けることで、搬送方向の下流側に他のパレット９が連なって位置していても、接触部９ｂの搬送方向の下流側に減速装置３の減速部３ａを配置する空間を有している。 The deceleration portion 3a of the deceleration device 3 is inserted into the insertion portion 9e of the pallet 9 from below the conveyor 2 by the urging force of the urging portion 3b. That is, the deceleration unit 3a is located on the downstream side of the contact portion 9b of the pallet 9 in the transport direction. As described above, the pallet 9 is provided with the insertion portion 9e at the front end portion of the contact portion 9b in the transport direction, so that even if the other pallets 9 are continuously located on the downstream side in the transport direction, the transport direction of the contact portion 9b There is a space for arranging the deceleration unit 3a of the deceleration device 3 on the downstream side of the speed reducer 3.
　［実施形態３］
　以下に、実施形態３に係るパレット搬送システム１Ｂについて説明する。図１１は、実施形態３に係るパレット搬送システム１Ｂのパレット１０の概略構成を示す。図１１に示すようにパレット１０は、パレット本体部１０ａの搬送方向前端部及び搬送方向後端部に
突出部を有する。 [Embodiment 3]
The pallet transfer system 1B according to the third embodiment will be described below. FIG. 11 shows a schematic configuration of the pallet 10 of the pallet transfer system 1B according to the third embodiment. As shown in FIG. 11, the pallet 10 has protrusions at the front end portion in the transport direction and the rear end portion in the transport direction of the pallet body portion 10a.
　パレット１０は、パレット本体部１０ａと、接触部１０ｂと、前突出部１０ｄと、後突出部１０ｆとを有する。 The pallet 10 has a pallet main body portion 10a, a contact portion 10b, a front protruding portion 10d, and a rear protruding portion 10f.
　前突出部１０ｄは、パレット１０の搬送方向の下流側に連なって位置している他のパレット１０をパレット本体部１０ａから離隔させる。前突出部１０ｄは、パレット本体部１０ａの搬送方向前端部から搬送方向の下流側に向かって突出している。つまり、前突出部１０ｄは、パレット１０の接触部１０ｂの搬送方向前端部から搬送方向の下流側に向かって突出している。前突出部１０ｄは、パレット１０の搬送方向の下流側に隣接する他のパレット１０の搬送方向後端部に接触する。前突出部１０ｄは、パレット１０の搬送方向の下流側に隣接する他のパレット１０とパレット１０の接触部１０ｂとを離隔させる。これにより、パレット１０の接触部１０ｂと搬送方向の下流側に隣接する他のパレット１０との間には、隙間が生じる。つまり、パレット１０の搬送方向前端部には、減速装置３の減速部３ａを挿入可能な隙間を有する前挿入部１０ｅが構成される。前挿入部１０ｅは、接触部１０ｂと前突出部１０ｄとから構成される。 The front protruding portion 10d separates the other pallets 10 that are continuously located on the downstream side of the pallet 10 in the transport direction from the pallet main body portion 10a. The front projecting portion 10d projects from the front end portion of the pallet body portion 10a in the transport direction toward the downstream side in the transport direction. That is, the front protruding portion 10d protrudes from the front end portion of the contact portion 10b of the pallet 10 toward the downstream side in the transport direction. The front protruding portion 10d comes into contact with the rear end portion of the other pallet 10 adjacent to the downstream side in the transport direction of the pallet 10. The front protruding portion 10d separates another pallet 10 adjacent to the downstream side in the transport direction of the pallet 10 from the contact portion 10b of the pallet 10. As a result, a gap is created between the contact portion 10b of the pallet 10 and the other pallet 10 adjacent to the downstream side in the transport direction. That is, a front insertion portion 10e having a gap into which the deceleration portion 3a of the deceleration device 3 can be inserted is configured at the front end portion of the pallet 10 in the transport direction. The front insertion portion 10e is composed of a contact portion 10b and a front protrusion portion 10d.
　後突出部１０ｆは、パレット１０の搬送方向の上流側に連なって位置している他のパレット１０をパレット本体部１０ａから離隔させる。後突出部１０ｆは、パレット本体部１０ａの搬送方向後端部から搬送方向の上流側に向かって突出している。後突出部１０ｆは、パレット１０の搬送方向の上流側に連なって位置する他のパレット１０の搬送方向後端部に接触する。後突出部１０ｆは、パレット１０の搬送方向の上流側に隣接する他のパレット１０とパレット本体部１０ａ部とを離隔させる。これにより、パレット本体部１０ａと搬送方向の上流側に隣接する他のパレット１０の間には、隙間が生じる。つまり、パレット１０の搬送方向後端部には、減速装置３の減速部３ａを挿入可能な隙間を有する後挿入部１０ｇが構成される。後挿入部１０ｇは、パレット本体部１０ａと後突出部１０ｆとから構成される。 The rear protruding portion 10f separates another pallet 10 located continuously on the upstream side of the pallet 10 in the transport direction from the pallet main body portion 10a. The rear protruding portion 10f protrudes from the rear end portion of the pallet main body portion 10a in the transport direction toward the upstream side in the transport direction. The rear protruding portion 10f comes into contact with the rear end portion in the transport direction of another pallet 10 located continuously on the upstream side of the pallet 10 in the transport direction. The rear protruding portion 10f separates the other pallet 10 adjacent to the upstream side of the pallet 10 in the transport direction from the pallet main body portion 10a. As a result, a gap is created between the pallet main body 10a and the other pallets 10 adjacent to the upstream side in the transport direction. That is, at the rear end of the pallet 10 in the transport direction, a rear insertion portion 10g having a gap into which the deceleration portion 3a of the speed reduction device 3 can be inserted is configured. The rear insertion portion 10g is composed of a pallet body portion 10a and a rear protrusion portion 10f.
　このように構成されるパレット１０は、接触部１０ｂの搬送方向前端部に前挿入部１０ｅの一部である前突出部１０ｄを有している。さらに、パレット１０は、パレット本体部１０ａの搬送方向後端部に後挿入部１０ｇの一部である後突出部１０ｆを有している。パレット１０の搬送方向の下流側に第１パレット１０Ａが隣接している場合、パレット１０の搬送方向前端部に設けられている前突出部１０ｄは、パレット１０の搬送方向の下流側の他のパレット１０の後突出部１０ｆに接触する。パレット１０の搬送方向の上流側に他のパレット１０が隣接している場合、パレット１０の搬送方向後端部に設けられている後突出部１０ｆは、パレット１０の搬送方向の上流側の他のパレットの前突出部１０ｄに接触する。このように、パレット１０には、接触部１０ｂの搬送方向前端部に設けられた前突出部１０ｄと他のパレット１０の後突出部１０ｆとから前挿入部１０ｅが構成される。また、パレット１０には、パレット本体部１０ａの搬送方向後端部に設けられた後突出部１０ｆと他のパレット１０の前突出部１０ｄとから後挿入部１０ｇが構成される。 The pallet 10 configured in this way has a front protruding portion 10d which is a part of the front insertion portion 10e at the front end portion of the contact portion 10b in the transport direction. Further, the pallet 10 has a rear protruding portion 10f which is a part of the rear insertion portion 10g at the rear end portion of the pallet main body portion 10a in the transport direction. When the first pallet 10A is adjacent to the downstream side of the pallet 10 in the transport direction, the front protruding portion 10d provided at the front end portion of the pallet 10 in the transport direction is the other pallet on the downstream side of the pallet 10 in the transport direction. It comes into contact with the rear protrusion 10f of 10. When another pallet 10 is adjacent to the upstream side of the pallet 10 in the transport direction, the rear protruding portion 10f provided at the rear end portion of the pallet 10 in the transport direction is the other upstream side of the pallet 10 in the transport direction. It comes into contact with the front protrusion 10d of the pallet. As described above, the pallet 10 is configured with the front insertion portion 10e from the front protrusion 10d provided at the front end of the contact portion 10b in the transport direction and the rear protrusion 10f of the other pallets 10. Further, the pallet 10 is configured with a rear insertion portion 10g from a rear protrusion 10f provided at the rear end of the pallet body 10a in the transport direction and a front protrusion 10d of another pallet 10.
　パレット１０の前挿入部１０ｅには、減速装置３の減速部３ａが付勢部３ｂの付勢力によってコンベア２の下方から挿入される。つまり、減速部３ａは、パレット１０における接触部１０ｂの搬送方向の下流側に位置する。このように、パレット１０は、接触部１０ｂの搬送方向前端部に前挿入部１０ｅを設けることで、搬送方向の下流側に他のパレット１０が連なって位置していても、接触部１０ｂの搬送方向の下流側に減速装置３の減速部３ａを配置する空間を有している。 The deceleration portion 3a of the deceleration device 3 is inserted into the front insertion portion 10e of the pallet 10 from below the conveyor 2 by the urging force of the urging portion 3b. That is, the deceleration unit 3a is located on the downstream side of the contact portion 10b of the pallet 10 in the transport direction. As described above, the pallet 10 is provided with the front insertion portion 10e at the front end portion of the contact portion 10b in the transport direction, so that the contact portion 10b can be transported even if the other pallets 10 are continuously located on the downstream side in the transport direction. A space for arranging the deceleration unit 3a of the deceleration device 3 is provided on the downstream side in the direction.
　このように、パレット搬送システム１、１Ａは、搬送物Ｍを載置可能な載置台Ｍｂを有するパレット７、９と、パレット７、９を搬送する搬送面２ａを有するコンベア２と、パレット７、９に接触する減速部３ａと、減速部３ａをパレット７、９に向かって付勢する付勢部３ｂとを備える。複数のパレット７、９は、減速装置３の減速部３ａに接触する接触部７ｂ、９ｂと、突出部７ｄ、９ｄと、減速部３ａが挿入される挿入部７ｅ、９ｅと、を有する。突出部７ｄは、接触部７ｂの搬送方向前端部に位置する。突出部９ｄは、パレット本体部９ａの搬送方向後端部に位置する。また、パレット１０の挿入部９ｅは、接触部１０ｂの搬送方向前端部から搬送方向の下流側に向かって突出する突出部９ｄ、または載置台Ｍｂを含むパレット本体部１０ａの搬送方向後端部から搬送方向の上流側に向かって突出する突出部９ｄの少なくとも一方の突出部９ｄを有する。 As described above, the pallet transfer systems 1 and 1A include the pallets 7 and 9 having the mounting table Mb on which the conveyed object M can be placed, the conveyor 2 having the conveying surface 2a for conveying the pallets 7 and 9, and the pallet 7. A deceleration unit 3a that comes into contact with the deceleration unit 9 and an urging unit 3b that urges the deceleration unit 3a toward the pallets 7 and 9 are provided. The plurality of pallets 7 and 9 have contact portions 7b and 9b that come into contact with the deceleration portion 3a of the deceleration device 3, protrusions 7d and 9d, and insertion portions 7e and 9e into which the deceleration portion 3a is inserted. The protruding portion 7d is located at the front end portion of the contact portion 7b in the transport direction. The protruding portion 9d is located at the rear end portion of the pallet main body portion 9a in the transport direction. Further, the insertion portion 9e of the pallet 10 is from a protruding portion 9d protruding from the front end portion in the transport direction of the contact portion 10b toward the downstream side in the transport direction, or from the rear end portion in the transport direction of the pallet body portion 10a including the mounting table Mb. It has at least one protruding portion 9d of the protruding portion 9d that protrudes toward the upstream side in the transport direction.
　接触部７ｂの搬送方向前端部に挿入部７ｅを有するパレット７の場合、減速装置３の減速部３ａを接触部７ｂの搬送方向の下流側に配置することができる。また、接触部７ｂの搬送方向前端部に挿入部７ｅを有するパレット７、パレット本体部９ａの搬送方向後端部に挿入部９ｅを有するパレット９、搬送方向前端部に前挿入部１０ｅを有し、搬送方向後端部に後挿入部１０ｇを有するパレット１０の場合、他のパレットが搬送方向に隙間なく並んでいても、減速部３ａを接触部７ｂ、９ｂ、１０ｂの搬送方向の下流側に配置することができる。接触部７ｂ、９ｂ、１０ｂは、コンベア２によって搬送方向に移動されると、挿入部７ｅ、９ｅ、１０ｅに挿入された減速部３ａに接触する。これにより、前後を他のパレットに挟まれたパレット７、９、１０を減速部３ａによって減速させることができる。 In the case of the pallet 7 having the insertion portion 7e at the front end portion of the contact portion 7b in the transport direction, the deceleration portion 3a of the speed reducer 3 can be arranged on the downstream side of the contact portion 7b in the transport direction. Further, the pallet 7 having the insertion portion 7e at the front end portion in the transport direction of the contact portion 7b, the pallet 9 having the insertion portion 9e at the rear end portion in the transport direction of the pallet body portion 9a, and the front insertion portion 10e at the front end portion in the transport direction. In the case of the pallet 10 having the rear insertion portion 10g at the rear end portion in the transport direction, the deceleration portion 3a is located downstream of the contact portions 7b, 9b and 10b in the transport direction even if other pallets are lined up without a gap in the transport direction. Can be placed. When the contact portions 7b, 9b and 10b are moved in the transport direction by the conveyor 2, they come into contact with the deceleration portions 3a inserted into the insertion portions 7e, 9e and 10e. As a result, the pallets 7, 9, and 10 sandwiched between the front and rear pallets can be decelerated by the deceleration unit 3a.
　また、パレット７は、接触部７ｂの搬送方向前端部に突出部７ｄを有することで減速装置３の減速部３ａを挿入するための空間を接触部７ｂの搬送方向の下流側に有している。同様に、パレット９は、載置台Ｍｂを含むパレット本体部９ａの搬送方向後端部に突出部９ｄを有することで、パレット９の上流側の他のパレット９における接触部９ｂの搬送方向の下流側に減速部３ａを挿入するための空間を有している。これにより、前後を他のパレットに挟まれた前記パレット７、９を減速させることができる。 Further, the pallet 7 has a protruding portion 7d at the front end portion of the contact portion 7b in the transport direction, so that a space for inserting the deceleration portion 3a of the speed reduction device 3 is provided on the downstream side of the contact portion 7b in the transport direction. .. Similarly, the pallet 9 has a protruding portion 9d at the rear end portion in the transport direction of the pallet main body portion 9a including the mounting table Mb, so that the pallet 9 is downstream of the contact portion 9b in the other pallet 9 on the upstream side of the pallet 9 in the transport direction. It has a space on the side for inserting the deceleration unit 3a. As a result, the pallets 7 and 9 sandwiched between the front and rear pallets can be decelerated.
　なお、パレット搬送システム１、１Ａ、１Ｂは、コンベア２の幅方向の両側に減速装置３を設けてもよい。図１２は、本発明に係るパレット搬送システム１、１Ａ、１Ｂにおけるパレットの別実施形態を示す概略平面図である。パレット搬送システム１、１Ａ、１Ｂは、例えば、左減速装置３Ａと右減速装置３Ｂとを備える。左右の減速装置３Ａ、３Ｂの減速部３Ａａ、３Ｂａは、コンベア２の幅方向に移動可能に位置する。この場合、パレット１１には、パレット本体部１１ａの平面視で左右両側に左接触部１１Ａｂと右接触部１１Ｂｂ設けられる。 The pallet transfer systems 1, 1A and 1B may be provided with speed reducing devices 3 on both sides of the conveyor 2 in the width direction. FIG. 12 is a schematic plan view showing another embodiment of the pallet in the pallet transfer system 1, 1A, 1B according to the present invention. The pallet transfer systems 1, 1A and 1B include, for example, a left speed reduction device 3A and a right speed reduction device 3B. The decelerating portions 3Aa and 3Ba of the left and right decelerating devices 3A and 3B are located so as to be movable in the width direction of the conveyor 2. In this case, the pallet 11 is provided with a left contact portion 11Ab and a right contact portion 11Bb on both the left and right sides in a plan view of the pallet main body portion 11a.
　図１２に示すように、突出部１１ｄは、パレット本体部１１ａから連なるパレットを離隔させる。突出部１１ｄは、パレット本体部１１ａの搬送方向前端部から搬送方向の下流側に向かって突出している。突出部１１ｄは、パレット本体部１１ａの左右方向の幅よりも狭い幅で突出している。 As shown in FIG. 12, the protruding portion 11d separates the pallet connected from the pallet main body portion 11a. The protruding portion 11d protrudes from the front end portion of the pallet main body portion 11a in the transport direction toward the downstream side in the transport direction. The protruding portion 11d protrudes with a width narrower than the width of the pallet main body portion 11a in the left-right direction.
　パレット本体部１１ａの搬送方向前端部であって左方向端部には、左減速装置３Ａと接触する左接触部１１Ａｂが設けられている。パレット本体部１１ａの搬送方向前端部であって右方向端部には、右減速装置３Ｂと接触する右接触部１１Ｂｂが設けられている。左接触部１１Ａｂの左接触傾斜面１１Ａｃは、搬送方向の下流側に向かうにつれて左減速装置３Ａから離れる方向に傾斜する傾斜面である。右接触部１１Ｂｂの右接触傾斜面１１Ｂｃは、搬送方向の下流側に向かうにつれて右減速装置３Ｂから離れる方向に傾斜する傾斜面である。 A left contact portion 11Ab that comes into contact with the left speed reducing device 3A is provided at the left end portion of the pallet body portion 11a in the transport direction. A right contact portion 11Bb that comes into contact with the right speed reducing device 3B is provided at the front end portion in the transport direction of the pallet body portion 11a in the right direction. The left contact inclined surface 11Ac of the left contact portion 11Ab is an inclined surface that inclines in a direction away from the left speed reducing device 3A toward the downstream side in the transport direction. The right contact inclined surface 11Bc of the right contact portion 11Bb is an inclined surface that inclines in a direction away from the right speed reducing device 3B toward the downstream side in the transport direction.
　左接触部１１Ａｂは、突出部１１ｄの左端部よりも左方向に突出している。右接触部１１Ｂｂは、突出部１１ｄの右端部よりも右方向に突出している。これにより、左接触部１１Ａｂの搬送方向の下流側であって突出部１１ｄの左端よりも左側には、左減速装置３Ａの左減速部３Ａａを挿入可能な左挿入部１１Ａｅが構成される。同様に、右接触部１１Ｂｂの搬送方向の下流側であって突出部１１ｄの右端よりも右側には、右減速装置３Ｂの右減速部３Ｂａを挿入可能な右挿入部１１Ｂｅが構成される。 The left contact portion 11Ab protrudes to the left from the left end portion of the protruding portion 11d. The right contact portion 11Bb protrudes to the right from the right end portion of the protruding portion 11d. As a result, a left insertion portion 11Ae into which the left deceleration portion 3Aa of the left deceleration device 3A can be inserted is configured on the downstream side of the left contact portion 11Ab in the transport direction and on the left side of the left end of the protrusion 11d. Similarly, on the downstream side of the right contact portion 11Bb in the transport direction and on the right side of the right end of the protruding portion 11d, a right insertion portion 11Be into which the right deceleration portion 3Ba of the right deceleration device 3B can be inserted is configured.
　［実施形態４］
　以下に、図１３を用いて、実施形態４に係るパレット搬送システム１Ｃについて説明する。図１３は、実施形態４に係るパレット搬送システム１Ｃの概略構成を示す。パレット搬送システム１Ｃのパレット１２は、接触部１２ｂに接触部車輪１２ｃを有する。パレット搬送システム１Ｃの減速装置１３は、減速部傾斜面１３ｃを有する。 [Embodiment 4]
Hereinafter, the pallet transfer system 1C according to the fourth embodiment will be described with reference to FIG. FIG. 13 shows a schematic configuration of the pallet transfer system 1C according to the fourth embodiment. The pallet 12 of the pallet transfer system 1C has a contact portion wheel 12c at the contact portion 12b. The speed reducing device 13 of the pallet transfer system 1C has a speed reducing portion inclined surface 13c.
　パレット１２のパレット本体部１２ａの搬送方向前端部には、減速装置１３と接触する接触部１２ｂが設けられている。本実施形態では、接触部１２ｂは、接触部車輪１２ｃを有する。接触部車輪１２ｃは、パレット本体部１２ａの搬送方向前端部に設けられている。接触部車輪１２ｃは、搬送方向に回転可能に構成されている。 A contact portion 12b that comes into contact with the speed reducing device 13 is provided at the front end portion of the pallet body 12a of the pallet 12 in the transport direction. In this embodiment, the contact portion 12b has a contact portion wheel 12c. The contact portion wheel 12c is provided at the front end portion of the pallet body portion 12a in the transport direction. The contact wheel 12c is configured to be rotatable in the transport direction.
　減速装置１３の減速部１３ａは、減速部傾斜面１３ｃを有する部材である。減速部１３ａは、減速部傾斜面１３ｃを上方且つ搬送方向の上流側に向けた状態でコンベア２の下方に位置する。減速部１３ａは、パレット１２の搬送方向に垂直な方向に移動可能に構成される。本実施形態において、減速部１３ａは、パレット１２の搬送方向に垂直な方向且つコンベア２の搬送面２ａに垂直な方向に移動可能に構成される。減速部１３ａの減速部傾斜面１３ｃは、コンベア２の搬送方向の下流側に向かうにつれてパレット１２に近づく方向に傾斜する傾斜面である。減速部１３ａの減速部傾斜面１３ｃには、パレット１２の接触部車輪１２ｃが接触する。 The deceleration unit 13a of the deceleration device 13 is a member having a deceleration unit inclined surface 13c. The deceleration unit 13a is located below the conveyor 2 with the deceleration unit inclined surface 13c facing upward and upstream in the transport direction. The deceleration unit 13a is configured to be movable in a direction perpendicular to the transport direction of the pallet 12. In the present embodiment, the deceleration unit 13a is configured to be movable in a direction perpendicular to the transport direction of the pallet 12 and in a direction perpendicular to the transport surface 2a of the conveyor 2. The deceleration portion inclined surface 13c of the deceleration portion 13a is an inclined surface that inclines toward the pallet 12 toward the downstream side in the transport direction of the conveyor 2. The contact portion wheel 12c of the pallet 12 comes into contact with the deceleration portion inclined surface 13c of the deceleration portion 13a.
　パレット１２の接触部車輪１２ｃは、搬送方向の下流側に搬送されると、減速部１３ａの減速部傾斜面１３ｃに接触する。接触部車輪１２ｃは、回転しながら減速部１３ａの減速部傾斜面１３ｃに接触する。パレット１２は、接触部１２ｂの接触部車輪１２ｃによって減速部１３ａを搬送方向の下流側に向かって押す。減速部１３ａは、接触部１２ｂの接触部車輪１２ｃによって、コンベア２の搬送面２ａの方向に押し下げられる。 When the contact portion wheel 12c of the pallet 12 is conveyed to the downstream side in the conveying direction, it comes into contact with the deceleration portion inclined surface 13c of the deceleration portion 13a. The contact portion wheel 12c comes into contact with the deceleration portion inclined surface 13c of the deceleration portion 13a while rotating. The pallet 12 pushes the deceleration portion 13a toward the downstream side in the transport direction by the contact portion wheel 12c of the contact portion 12b. The deceleration portion 13a is pushed down in the direction of the transport surface 2a of the conveyor 2 by the contact portion wheels 12c of the contact portion 12b.
　減速部１３ａは、接触部１２ｂの接触部車輪１２ｃを搬送方向に垂直且つ上方向に向かって押す。接触部１２ｂの接触部車輪１２ｃには、減速装置３の減速部１３ａから伝達される力の分力として、減速部１３ａの減速部傾斜面１３ｃに平行且つ搬送方向の上流側に向かう傾斜面方向反力と、減速部傾斜面１３ｃに垂直な方向の垂直方向分力とが生じる。パレット１２は、減速部１３ａから伝達される傾斜面方向反力と、減速部傾斜面１３ｃに垂直な方向の垂直方向分力によって減速される。 The deceleration unit 13a pushes the contact portion wheel 12c of the contact portion 12b vertically and upward in the transport direction. The contact portion wheel 12c of the contact portion 12b is parallel to the deceleration portion inclined surface 13c of the deceleration portion 13a and in the inclined surface direction toward the upstream side in the transport direction as a component of the force transmitted from the deceleration portion 13a of the deceleration device 3. A reaction force and a vertical component force in the direction perpendicular to the deceleration portion inclined surface 13c are generated. The pallet 12 is decelerated by the reaction force in the inclined surface direction transmitted from the decelerating portion 13a and the vertical component force in the direction perpendicular to the decelerating portion inclined surface 13c.
　このように構成されるパレット搬送システム１Ｃは、パレット１２の接触部１２ｂに接触部車輪１２ｃを有する。接触部車輪１２ｃは、回転しながら減速装置１３の減速部１３ａに接触するので、接触部１２ｂに減速部１３ａが接触した際に摩擦による大きな減速力が生じない。これにより、複数のパレット１２が隙間なく並んで搬送されていても、複数のパレット１２の並びを乱すことなく前後を他のパレットに挟まれたパレット１２を減速させることができる。 The pallet transfer system 1C configured as described above has a contact portion wheel 12c at the contact portion 12b of the pallet 12. Since the contact portion wheel 12c comes into contact with the deceleration portion 13a of the deceleration device 13 while rotating, a large deceleration force due to friction does not occur when the deceleration portion 13a comes into contact with the contact portion 12b. As a result, even if the plurality of pallets 12 are conveyed side by side without gaps, the pallets 12 sandwiched between the front and rear pallets can be decelerated without disturbing the arrangement of the plurality of pallets 12.
　［実施形態５］
　以下に、実施形態５に係るパレット搬送システム１Ｄについて説明する。図１４に、実施形態５に係るパレット搬送システム１Ｄの側面図を示す。パレット１４は、パレット本体部１４ａの搬送方向後端部に加速傾斜面１４ｅを有する。 [Embodiment 5]
The pallet transfer system 1D according to the fifth embodiment will be described below. FIG. 14 shows a side view of the pallet transfer system 1D according to the fifth embodiment. The pallet 14 has an acceleration inclined surface 14e at the rear end of the pallet body 14a in the transport direction.
　図１４に示すように、パレット本体部１４ａの搬送方向前端部には、減速装置３と接触する接触部１４ｂが設けられている。接触傾斜面１４ｃは、搬送方向の下流側に向かうにつれて減速装置３から離れる方向に傾斜する傾斜面である。 As shown in FIG. 14, a contact portion 14b that comes into contact with the speed reducing device 3 is provided at the front end portion of the pallet body portion 14a in the transport direction. The contact inclined surface 14c is an inclined surface that inclines in a direction away from the speed reducing device 3 toward the downstream side in the transport direction.
　突出部１４ｄは、パレット本体部１４ａに対して隣接するパレット１４を離隔させる。突出部１４ｄは、パレット本体部１４ａの搬送方向後端部から搬送方向の上流側に向かって突出している。突出部１４ｄは、パレット１４の搬送方向の上流側に隣接する他のパレットの搬送方向後端部に接触する。 The protruding portion 14d separates the pallet 14 adjacent to the pallet main body portion 14a. The protruding portion 14d protrudes from the rear end portion of the pallet main body portion 14a in the transport direction toward the upstream side in the transport direction. The protruding portion 14d comes into contact with the rear end portion of the pallet 14 in the transport direction of another pallet adjacent to the upstream side in the transport direction.
　突出部１４ｄには、減速装置３と接触する加速傾斜面１４ｅが設けられている。加速傾斜面１４ｅは、搬送方向の上流側に向かうにつれて減速装置３から離れる方向に傾斜する傾斜面である。つまり、パレット本体部１４ａの搬送方向後端部には、搬送方向の上流側に向かうにつれてパレット本体部１４ａの下面から上方向に向かう加速傾斜面１４ｅが設けられている。 The protruding portion 14d is provided with an acceleration inclined surface 14e that comes into contact with the speed reducing device 3. The acceleration inclined surface 14e is an inclined surface that inclines in a direction away from the speed reducing device 3 toward the upstream side in the transport direction. That is, the rear end portion of the pallet main body portion 14a in the transport direction is provided with an acceleration inclined surface 14e that goes upward from the lower surface of the pallet main body portion 14a toward the upstream side in the transport direction.
　このように構成されるパレット１４は、接触部１４ｂの接触傾斜面１４ｃによって減速部３ａを下限位置まで押し下げる。更にパレット１４は、接触傾斜面１４ｃの搬送方向上流側端に設けられているパレット本体部１４ａの底面によって減速部３ａを下限位置に押し下げる。パレット１４は、パレット本体部１４ａの底面によって減速部３ａを下限位置に押し下げた状態で搬送方向の下流側へ搬送される。パレット１４の加速傾斜面１４ｅは、更に搬送方向の下流側へ搬送されると、減速部３ａに接触する。減速部３ａは、接触部１４ｂの接触傾斜面１４ｃを搬送方向に垂直且つ上方向に向かって押す。 The pallet 14 configured in this way pushes the deceleration portion 3a down to the lower limit position by the contact inclined surface 14c of the contact portion 14b. Further, the pallet 14 pushes the deceleration portion 3a down to the lower limit position by the bottom surface of the pallet main body portion 14a provided at the upstream end of the contact inclined surface 14c in the transport direction. The pallet 14 is conveyed to the downstream side in the conveying direction with the deceleration portion 3a pushed down to the lower limit position by the bottom surface of the pallet main body portion 14a. When the acceleration inclined surface 14e of the pallet 14 is further conveyed to the downstream side in the conveying direction, the acceleration inclined surface 14e comes into contact with the deceleration portion 3a. The deceleration unit 3a pushes the contact inclined surface 14c of the contact portion 14b vertically and upward in the transport direction.
　突出部１４ｄの加速傾斜面１４ｅには、減速装置３の減速部３ａから伝達される減速部３ａが押す力の分力として、加速傾斜面１４ｅに平行且つ搬送方向の上流側に向かう傾斜面方向反力と、加速傾斜面１４ｅに垂直な方向の垂直方向分力とが生じる。パレット１４は、減速部３ａから伝達される傾斜面方向反力と垂直方向分力とによって加速される。加速傾斜面１４ｅによる減速部３ａの押し下げ量は、パレット１４が搬送方向の下流側に搬送されるにつれて減少する。これにより、パレット１４では、搬送方向の下流側に搬送されるにつれて減速部３ａから伝達される力が減少する。同様に、パレット１４では、搬送方向の下流側に搬送されるにつれて減速部３ａから伝達される傾斜面方向反力と垂直方向分力とが減少する。つまり、パレット１４は、搬送方向の下流側に搬送されるにつれて一定の割合で減少する加速度で加速される。 On the accelerating inclined surface 14e of the projecting portion 14d, the inclined surface direction parallel to the accelerating inclined surface 14e and toward the upstream side in the transport direction as a component of the force pushed by the decelerating portion 3a transmitted from the decelerating portion 3a of the decelerating device 3. A reaction force and a vertical component force in the direction perpendicular to the acceleration inclined surface 14e are generated. The pallet 14 is accelerated by the reaction force in the inclined surface direction and the component force in the vertical direction transmitted from the deceleration unit 3a. The amount of pushing down of the deceleration portion 3a by the acceleration inclined surface 14e decreases as the pallet 14 is transported to the downstream side in the transport direction. As a result, in the pallet 14, the force transmitted from the deceleration unit 3a decreases as the pallet 14 is transported to the downstream side in the transport direction. Similarly, in the pallet 14, the reaction force in the inclined surface direction and the component force in the vertical direction transmitted from the deceleration unit 3a decrease as the pallet 14 is transported to the downstream side in the transport direction. That is, the pallet 14 is accelerated at an acceleration that decreases at a constant rate as it is transported to the downstream side in the transport direction.
　このように、パレット１４には、搬送方向の下流側に搬送されながら加速傾斜面１４ｅに減速装置３の減速部３ａが接触することで搬送方向の下流側に向かう傾斜面方向反力と垂直方向分力とが生じる。パレット１４は、加速傾斜面１４ｅに減速部３ａが接触し、且つ加速傾斜面１４ｅ上を移動している間、搬送方向の下流側に向かう傾斜面方向反力と垂直方向分力とによって加速される。この際、パレット１４は、搬送方向の下流側に搬送されるにつれて一定の割合で減少する加速度で加速される。加速されたパレット１４は、パレット１４の上流側のパレット１４から切り離される。これにより、下流側のパレット１４に影響されることなく上流側のパレット１４を減速させることができる。 In this way, the pallet 14 is conveyed to the downstream side in the transport direction, and the deceleration portion 3a of the speed reducer 3 comes into contact with the acceleration inclined surface 14e, so that the reaction force in the inclined surface direction toward the downstream side in the transport direction is perpendicular to the pallet 14. A component force is generated. The pallet 14 is accelerated by the reaction force in the inclined surface direction and the component force in the vertical direction toward the downstream side in the transport direction while the deceleration portion 3a is in contact with the accelerating inclined surface 14e and is moving on the accelerating inclined surface 14e. To. At this time, the pallet 14 is accelerated at an acceleration that decreases at a constant rate as it is transported to the downstream side in the transport direction. The accelerated pallet 14 is separated from the pallet 14 on the upstream side of the pallet 14. As a result, the upstream pallet 14 can be decelerated without being affected by the downstream pallet 14.
　以上、本発明の実施の形態を説明したが、上述した実施の形態は本発明を実施するための例示に過ぎない。よって、上述した実施の形態に限定されることなく、その趣旨を逸脱しない範囲内で上述した実施の形態を適宜変形して実施することが可能である。 Although the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the embodiment is not limited to the above-described embodiment, and the above-described embodiment can be appropriately modified and implemented within a range that does not deviate from the gist thereof.
　本発明は、搬送物を載置可能な載置台を有し、コンベアで搬送されるパレット及びパレット搬送システムに適用可能である。 The present invention has a mounting table on which a transported object can be placed, and is applicable to a pallet and a pallet transport system transported by a conveyor.
　１　パレット搬送システム
　２　コンベア
　３　減速装置
　３ａ　減速部
　３ｂ　付勢部
　７　パレット
　７ａ　パレット本体部
　７ｂ　接触部
　７ｃ　接触傾斜面
　７ｄ　突出部
　７ｅ　挿入部 1 Pallet transfer system 2 Conveyor 3 Deceleration device 3a Deceleration part 3b Bounce part 7 Pallet 7a Pallet body part 7b Contact part 7c Contact inclined surface 7d Protruding part 7e Insertion part

Claims (12)

  1. 　搬送物を載置可能な載置台を有し、コンベアで搬送されるパレットであって、
    　前記パレットを減速させる減速装置が接触する接触部と、
    　前記減速装置が挿入される挿入部と、を有し、
    　前記挿入部は、
    　前記接触部の搬送方向前端部または前記載置台の搬送方向後端部の少なくとも一方に位置する、パレット。     A pallet that has a mounting table on which to be transported and is transported by a conveyor.
    The contact portion with which the speed reducing device for decelerating the pallet is in contact,
    It has an insertion portion into which the speed reducer is inserted, and has an insertion portion.
    The insertion part is
    A pallet located at least one of the front end in the transport direction of the contact portion or the rear end in the transport direction of the above-mentioned stand.
  2. 　請求項１に記載のパレットにおいて、
    　前記接触部は、
    　搬送方向の下流側に向かうにつれて前記減速装置から離れる方向に傾斜する接触傾斜面を有する、パレット。     In the pallet according to claim 1,
    The contact part is
    A pallet having a contact inclined surface that inclines in a direction away from the speed reducing device toward the downstream side in the transport direction.
  3. 　請求項１に記載のパレットにおいて、
    　前記接触部は、
    　搬送方向に回転可能な接触部車輪を有する、パレット。     In the pallet according to claim 1,
    The contact part is
    A pallet with contact wheels that can rotate in the transport direction.
  4. 　請求項１から３のいずれか一項に記載のパレットにおいて、
    　前記挿入部は、
    　前記接触部の搬送方向前端部から搬送方向の下流側に向かって突出する突出部、または前記載置台の搬送方向後端部から搬送方向の上流側に向かって突出する突出部のうち少なくとも一方を有するパレット。     In the pallet according to any one of claims 1 to 3,
    The insertion part is
    At least one of the protruding portion of the contact portion protruding from the front end portion in the transport direction toward the downstream side in the transport direction or the protruding portion protruding toward the upstream side in the transport direction from the rear end portion of the above-mentioned stand in the transport direction. Palette to have.
  5. 　請求項１から４のいずれか一項に記載のパレットにおいて、
    　前記パレットの搬送方向後端部に搬送方向の上流側に向かうにつれて前記減速装置から離れる方向に傾斜する加速傾斜面をさらに有する、パレット。     In the pallet according to any one of claims 1 to 4,
    A pallet further having an acceleration inclined surface at the rear end portion of the pallet in the transport direction, which is inclined in a direction away from the speed reducing device toward the upstream side in the transport direction.
  6. 　搬送物を載置可能な載置台を有するパレットと、
    　前記パレットを搬送する搬送面を有するコンベアと、
    　前記パレットに接触する減速部と、
    　前記減速部を前記パレットに向かって付勢する付勢部と、
    を備え、
    　前記パレットは、
    　前記減速部に接触する接触部と、
    　前記減速部が挿入される挿入部と、を有し、
    　前記挿入部は、
    　前接触部の搬送方向前端部または前記載置台の搬送方向後端部の少なくとも一方に位置する、パレット搬送システム。     A pallet with a mounting table on which the transported object can be placed,
    A conveyor having a transport surface for transporting the pallet, and a conveyor.
    The deceleration part that comes into contact with the pallet and
    An urging unit that urges the deceleration unit toward the pallet,
    Equipped with
    The pallet is
    The contact part that comes into contact with the deceleration part and
    It has an insertion portion into which the deceleration portion is inserted, and has an insertion portion.
    The insertion part is
    A pallet transport system located at least one of the transport direction front end of the front contact or the transport direction rear end of the preamble.
  7. 　請求項６に記載のパレット搬送システムにおいて、
    　前記接触部は、
    　前記コンベアの搬送方向の下流側に向かうにつれて前記減速部から離れる方向に傾斜する接触傾斜面を有し、前記接触傾斜面に前記減速部が接触する、パレット搬送システム。     In the pallet transfer system according to claim 6,
    The contact part is
    A pallet conveyor system having a contact inclined surface that inclines in a direction away from the decelerating portion toward the downstream side in the conveying direction of the conveyor, and the decelerating portion comes into contact with the contact inclined surface.
  8. 　請求項６または７に記載のパレット搬送システムにおいて、
    　前記接触部は、
    　搬送方向前端部に回転可能な接触部車輪を有し、
    　前記減速部は、
    　前記コンベアの搬送方向の下流側に向かうにつれて前記パレットに近づく方向に傾斜する減速部傾斜面を有し、前記減速部傾斜面に前記接触部車輪が接触する、パレット搬送システム。     In the pallet transfer system according to claim 6 or 7.
    The contact part is
    Has a rotatable contact wheel at the front end in the transport direction,
    The deceleration unit
    A pallet transport system having a deceleration portion inclined surface that inclines in a direction approaching the pallet toward the downstream side in the transport direction of the conveyor, and the contact portion wheels come into contact with the deceleration portion inclined surface.
  9. 　請求項６から８のいずれか一項に記載のパレット搬送システムにおいて、
    　前記挿入部は、
    　前接触部の搬送方向前端部から搬送方向の下流側に向かって突出する突出部、または前記載置台の搬送方向後端部から搬送方向の上流側に向かって突出する突出部の少なくとも一方の突出部を有する、パレット搬送システム。     In the pallet transfer system according to any one of claims 6 to 8.
    The insertion part is
    At least one of the protrusions protruding from the front end of the front contact portion in the transport direction toward the downstream side in the transport direction, or the protrusions protruding toward the upstream side in the transport direction from the rear end portion of the platform described above in the transport direction. A pallet transfer system having a part.
  10. 　請求項６から９のいずれか一項に記載のパレット搬送システムにおいて、
    　前記パレットの搬送方向後端部に搬送方向の上流側に向かうにつれて前記減速部から離れる方向に傾斜する加速傾斜面をさらに有する、パレット搬送システム。     In the pallet transfer system according to any one of claims 6 to 9.
    A pallet transport system further comprising an acceleration inclined surface at the rear end portion of the pallet in the transport direction, which is inclined in a direction away from the deceleration portion toward the upstream side in the transport direction.
  11. 　請求項６から１０のいずれか一項に記載のパレット搬送システムにおいて、
    　前記減速部と対向する位置にパレット押さえ部をさらに有し、
    　前記減速部が前記パレットに接触している間、前記パレット押さえ部が前記パレットに接触しているパレット搬送システム。     In the pallet transfer system according to any one of claims 6 to 10.
    A pallet holding portion is further provided at a position facing the deceleration portion.
    A pallet transfer system in which the pallet holding portion is in contact with the pallet while the deceleration portion is in contact with the pallet.
  12. 　請求項６から１１のいずれか一項に記載のパレット搬送システムにおいて、
    　前記パレットを作業位置で停止させる作業停止位置と前記パレットを前記作業位置から搬出させる作業解除位置とに切り替わる第１ストッパと、
    　前記パレットを前記減速部の位置よりも搬送方向の下流側であって、前記作業位置より
    も搬送方向の上流側に位置する待機位置で停止させる待機停止位置と前記パレットを前記待機位置から搬出させる待機解除位置とに切り替わる第２ストッパと、をさらに有し、
    　前記第１ストッパは、
    　前記作業位置での作業が終了すると前記作業停止位置から前記作業解除位置に切り替わり、前記作業位置のパレットが前記作業位置から搬出されるために必要な作業位置搬出時間が経過した以降に、前記作業停止位置に切り替わり、
    　前記第２ストッパは、
    　前記第１ストッパが作業解除位置に切り替わってから前記作業位置搬出時間が経過した以降に、前記待機解除位置に切り替わり、前記待機位置のパレットが前記待機位置から搬出されるために必要な待機位置搬出時間が経過すると、前記待機停止位置に切り替わり、前記待機位置のパレットよりも搬送方向の上流側のパレットが前記減速部によって減速されながら前記待機位置に搬入される、パレット搬送システム。     In the pallet transfer system according to any one of claims 6 to 11.
    A first stopper that switches between a work stop position for stopping the pallet at a work position and a work release position for carrying out the pallet from the work position.
    The pallet is carried out from the standby position and the standby stop position where the pallet is stopped at the standby position located on the downstream side in the transport direction from the position of the deceleration unit and located on the upstream side in the transport direction from the work position. Further has a second stopper that switches to the standby release position,
    The first stopper is
    When the work at the work position is completed, the work is switched from the work stop position to the work release position, and after the work position carry-out time required for the pallet at the work position to be carried out from the work position has elapsed, the work is performed. Switch to the stop position,
    The second stopper is
    After the work position unloading time has elapsed after the first stopper is switched to the work release position, the standby position is switched to the standby release position and the pallet at the standby position is unloaded from the standby position. A pallet transport system that switches to the standby stop position after a lapse of time, and the pallet on the upstream side of the pallet in the standby position in the transport direction is carried into the standby position while being decelerated by the deceleration unit.
PCT/JP2020/047554 2020-06-23 2020-12-18 Pallet and pallet conveyance system WO2021260975A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5532374U (en) * 1978-08-24 1980-03-01
JPS5747090B2 (en) * 1977-11-17 1982-10-07
JPH0340813Y2 (en) * 1987-03-30 1991-08-28
JP6206239B2 (en) * 2014-02-18 2017-10-04 株式会社メイキコウ Pallet transport device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5747090B2 (en) * 1977-11-17 1982-10-07
JPS5532374U (en) * 1978-08-24 1980-03-01
JPH0340813Y2 (en) * 1987-03-30 1991-08-28
JP6206239B2 (en) * 2014-02-18 2017-10-04 株式会社メイキコウ Pallet transport device

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JPWO2021260975A1 (en) 2021-12-30

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