WO2021260976A1 - Système de transport de palettes et palette - Google Patents

Système de transport de palettes et palette Download PDF

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Publication number
WO2021260976A1
WO2021260976A1 PCT/JP2020/047555 JP2020047555W WO2021260976A1 WO 2021260976 A1 WO2021260976 A1 WO 2021260976A1 JP 2020047555 W JP2020047555 W JP 2020047555W WO 2021260976 A1 WO2021260976 A1 WO 2021260976A1
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WO
WIPO (PCT)
Prior art keywords
pallet
contact
wheel
stopper
wheels
Prior art date
Application number
PCT/JP2020/047555
Other languages
English (en)
Japanese (ja)
Inventor
進一 友山
顕寛 戸田
嘉孝 久保
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 CN202080102264.1A priority Critical patent/CN115916671A/zh
Priority to JP2022532253A priority patent/JPWO2021260976A1/ja
Publication of WO2021260976A1 publication Critical patent/WO2021260976A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D19/38—Details or accessories
    • B65D19/40—Elements for spacing platforms from supporting surface
    • B65D19/42—Arrangements or applications of rollers or wheels
    • 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
    • B65G35/00—Mechanical conveyors not otherwise provided for
    • B65G35/08—Mechanical conveyors not otherwise provided for comprising trains of unconnected load-carriers, e.g. belt sections, movable in a path, e.g. a closed path, adapted to contact each other and to be propelled by means arranged to engage each load-carrier in turn
    • 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 transfer system and a pallet.
  • a pallet transport system having a pallet having a pallet body on which a pallet can be placed and a conveyor having a transport surface for transporting the pallet is known.
  • a pallet transport system for example, in Patent Document 1, a conveyor, a plurality of carriages for mounting a work mounted on the conveyor and movable together with the conveyor, and a moving path of the carriages are in the middle.
  • a conveyor comprising a stopper for stopping the carriage and a wheel lock mechanism for locking or unlocking the wheels of the carriage.
  • the wheel lock mechanism normally locks the wheels on the conveyor so as not to rotate, while releasing the lock in response to the bogie stop operation of the stopper.
  • the wheel lock mechanism has a lock gear coaxially fixed to the wheel, and a swing member having a lock pin that can be engaged with and detached from the gear and is swingably supported by the carriage. ..
  • the rocking member engages the lock pin with the locking gear by the urging of the spring, and swings by contacting the stopper to disengage the lock pin from the locking gear.
  • the wheels of the bogie are unlocked, so that the bogie moves on the conveyor in a direction away from the stopper.
  • the wheels of the dolly are locked again, so that the dolly moves with the conveyor and comes into contact with the stopper.
  • the trolley when the trolley is stopped by the stopper, the trolley first contacts the stopper until the trolley stops with respect to the stopper in a state of being in contact with the stopper.
  • the statically indeterminate time is long. Therefore, there is a problem that the time required for the work process becomes long in the device that performs the work on the work transported by the carriage of the transfer device.
  • a pallet transfer system that can shorten the work process time as much as possible is desired.
  • a pallet transport system capable of shortening the statically indeterminate time from when the pallet comes into contact with the stopper until the pallet stops in contact with the stopper.
  • An object of the present invention is to provide a pallet transfer system capable of shortening the statically indeterminating time of the pallet when the pallet is stopped by the stopper.
  • a pallet having a pallet body on which a transported object can be placed, a conveyor having a transport surface for transporting the pallets, and a conveyor along the transport surface of the conveyor in a transport direction. It has a guide portion that extends and guides the pallet that is conveyed on the conveyor surface, and a stopper that stops the pallet at a predetermined position on the conveyor surface.
  • the pallet has a contact portion that comes into contact with the stopper, and a damping portion that generates a damping force in the transport direction with respect to the pallet after the contact portion comes into contact with the stopper.
  • the pallet according to the embodiment of the present invention is a pallet having a pallet body on which a conveyed object can be placed and is conveyed on a conveyor surface.
  • This pallet is located at the lower part of the pallet body and has a wheel that can rotate about an axle and a wheel lock mechanism that locks or unlocks the rotation of the wheel.
  • the wheel lock mechanism includes a support shaft extending in the transport direction of the pallet, a lock portion fixed to the support shaft and stopping the rotation of the wheel by contacting the wheel, and the support shaft and the lock portion.
  • the lock portion has an urging portion for urging the first position where the lock portion comes into contact with the wheel.
  • the support shaft projects from the pallet body in the transport direction.
  • the statically indeterminating time of the pallet can be shortened.
  • 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 plan view showing a schematic configuration of a pallet.
  • FIG. 3 is a cross-sectional view taken along the line III-III of FIG.
  • FIG. 4 is a diagram schematically showing a state in which the pallet moves together with the conveyor.
  • FIG. 5 is a diagram schematically showing a state in which the pallet is in contact with the stopper.
  • FIG. 6 is a plan view showing the relationship between the transport path and the pallet.
  • FIG. 7 is a diagram schematically showing an example of a statically indeterminate time in a pallet transfer system having the configuration of the present embodiment.
  • FIG. 8 is a diagram schematically showing the statically indeterminate time when there is no gap between the pallet and the pair of guide portions.
  • FIG. 9 is a plan view showing a schematic configuration of a pallet when the left and right support shafts have different forward protrusion lengths.
  • FIG. 10 is a plan view schematically showing a state in which the pallet conveyed by the conveyor is in contact with the stopper.
  • FIG. 11 is a diagram showing a schematic configuration of a pallet of the pallet transfer system according to the second embodiment.
  • FIG. 12 is a diagram schematically showing a state in which the pallet is in contact with the stopper.
  • FIG. 13 is a diagram schematically showing a state in which the pallet moves in the direction opposite to the transport direction with respect to the stopper after the pallet comes into contact with the stopper.
  • the transport direction of the pallet 2 is referred to as "forward direction”, and the direction opposite to the transport direction of the pallet 2 is referred to as "rear direction”. Further, when viewed from the conveyed object M on the pallet 2, the left with respect to the conveyed direction is referred to as “left direction”, and the right with respect to the conveyed direction is referred to as "right direction”.
  • FIG. 1 is a diagram showing a schematic configuration of a pallet transfer system 1 according to the first embodiment of the present invention.
  • the pallet transfer system 1 is a system that conveys the pallet 2 on which the conveyed object M is placed by the conveyor 3.
  • 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 has a plurality of pallets 2, a conveyor 3, a pair of guide portions 4, and a stopper 5.
  • the conveyor 3 can be moved in one direction by a drive mechanism (not shown).
  • the conveyor 3 is, for example, an endless band-shaped conveyor belt.
  • the upper surface of the conveyor 3 is a conveyor surface 3a that conveys a plurality of pallets 2.
  • the pair of guide portions 4 are located on both sides of the conveyor 3 in the width direction.
  • the pair of guide portions 4 are plate-shaped members extending in the moving direction of the conveyor 3.
  • a transport path R extending along the conveyor 3 is formed between the pair of guide portions 4.
  • the stopper 5 moves up and down at a predetermined position on the conveyor 3 by a drive mechanism (not shown).
  • the stopper 5 is a member for stopping the pallet 2 mounted on the conveyor 3 with respect to the conveyor 3.
  • the stopper 5 descends to a height position at which the pallet 2 can be stopped with respect to the conveyor 3, and when the movement of the pallet 2 is allowed, the stopper 5 rises to a height position that does not hinder the movement of the pallet 2.
  • the plurality of pallets 2 are located side by side on the conveyor 3 in the transport direction.
  • the plurality of pallets 2 move in the transport direction together with the conveyor 3 while being placed on the conveyor 3. Therefore, the transport direction of the pallet 2 is the moving direction of the conveyor 3, and is the direction in which the transport surface 3a of the conveyor 3 extends.
  • FIG. 2 is a plan view showing a schematic configuration of the pallet 2.
  • FIG. 3 is a cross-sectional view taken along the line III-III of FIG. As shown in FIGS. 2 and 3, the pallet 2 has a pallet body 21, a plurality of wheels 22, and a wheel locking mechanism 23.
  • the pallet body 21 is a flat plate-shaped member on which the conveyed object M can be placed.
  • the pallet body 21 has a rectangular shape in a plan view.
  • the plurality of wheels 22 are rotatably supported at the lower part of the pallet body 21 around the axle P.
  • the plurality of wheels 22 are located side by side with respect to the pallet body 21. That is, the plurality of wheels 22 are arranged in the transport direction with respect to the pallet body 21.
  • the plurality of wheels 22 are located at the four corners of the pallet body 21 in a plan view.
  • the axle P is parallel to the transport surface 3a of the conveyor 3.
  • the pallet body 21 can be moved with respect to the conveyor 3 by a plurality of wheels 22.
  • the wheel lock mechanism 23 locks or unlocks the rotation of the plurality of wheels 22.
  • the wheel lock mechanism 23 is supported by the pallet body 21.
  • the wheel lock mechanism 23 may lock or unlock a plurality of wheels 22 at the same time, or may lock or unlock the plurality of wheels 22 separately.
  • the wheel lock mechanism 23 has a plurality of lock portions 26, a support shaft 27, and a spring 28.
  • the plurality of lock portions 26 are located rearward with respect to the plurality of wheels 22. Each lock portion 26 locks the rotation of each wheel 22 by coming into contact with each wheel 22.
  • the support shaft 27 connects at least a part of the lock portions 26 among the plurality of lock portions 26.
  • the support shaft 27 connects, for example, the lock portions 26 arranged in front of and behind the pallet 2.
  • the support shaft 27 is a rod-shaped member and penetrates the pallet body 21 in the front-rear direction.
  • Each of the plurality of lock portions 26 is fixed to the support shaft 27.
  • the front end portion 27a of the support shaft 27 projects forward from the front surface of the pallet body 21.
  • the front end portion 27a of the support shaft 27 is located at the frontmost position.
  • the portion of the support shaft 27 that protrudes forward from the front surface of the pallet body 21 is the protrusion 27b.
  • the front end portion 27a is located at the front end of the protrusion portion 27b. Therefore, the front end portion 27a and the protrusion portion 27b are contact portions that come into contact with the stopper 5.
  • a spring 28 is located on the outer circumference of a part of the support shaft 27 in the axial direction.
  • the spring 28 is a compression spring, and deforms in the compression direction to generate an elastic restoring force.
  • the front end of the spring 28 is fixed to the support shaft 27, while the rear end of the spring 28 is in contact with the pallet body 21.
  • the spring 28 urges the support shaft 27 forward with respect to the pallet body 21.
  • the spring 28 may be located at only one position in the axial direction of the support shaft 27, or may be located at a plurality of positions in the axial direction of the support shaft 27.
  • the lock portion 26 fixed to the support shaft 27 is pressed against the wheel 22. Therefore, in a state where no rear force is input to the support shaft 27, the wheel 22 is in a locked state in which the rotation is locked by the wheel lock mechanism 23.
  • the position of the lock portion 26 that locks the wheel 22 is the first position. That is, the first position of the lock portion 26 is the position of the lock portion 26 when no external force is applied to the support shaft 27.
  • the spring 28 functions as an urging portion that urges the lock portion 26 to the first position in contact with the wheel 22.
  • FIG. 4 is a diagram schematically showing a state in which the pallet 2 moves together with the conveyor 3.
  • FIG. 5 is a diagram schematically showing a state in which the pallet 2 is in contact with the stopper 5.
  • the pallet 2 moves in the moving direction of the conveyor 3 together with the conveyor 3, as shown by the white arrow in FIG. Therefore, the pallet 2 is conveyed in the conveying direction by the conveyor 3.
  • the moving direction of the conveyor 3 is indicated by an arrow with diagonal lines.
  • the rearward movement of the support shaft 27 causes the spring 28 to be deformed in the compression direction. Therefore, the spring 28 has an elastic restoring force that pushes the support shaft 27 forward.
  • the support shaft 27 has an elastic restoring force of the spring 28 as shown by the solid arrow in FIG. Move forward by. Then, the lock portion 26 fixed to the support shaft 27 also moves forward and comes into contact with the wheel 22. As a result, the lock portion 26 locks the wheel 22 again.
  • the pallet 2 of the present embodiment has the wheel lock mechanism 23 described above, a static time is required from the first contact of the pallet 2 with the stopper 5 until the pallet 2 is stopped at a predetermined position. This statically indeterminate time greatly affects the work time when the pallet 2 is conveyed by the pallet transfer system 1 and the work is performed on the conveyed object M by another device.
  • FIG. 6 is a plan view showing the relationship between the transport path R and the pallet 2.
  • the transport path R is a space for transporting the pallet 2 by the conveyor 3. As described above, the transport path R is composed of a transport surface 3a of the conveyor 3 and a pair of guide portions 4 located on both sides in the width direction thereof.
  • the rear portion 21a of the pallet body 21 is paired. Contact one of the guide portions 4.
  • the rear portion 21a of the pallet body 21 is a corner portion of the rear portion of the pallet body 21.
  • the rear portion 21a of the pallet body 21 that comes into contact with the pair of guide portions 4 functions as a damping portion that generates a damping force with respect to the pallet 2. ..
  • the pair of guide portions 4 are placed between the transport surface 3a and the pallet 2 located on the transport surface 3a when viewed from above. It has a predetermined gap D that allows the pallet 2 to tilt diagonally with respect to the transport direction.
  • the predetermined gap D has dimensions such that when the pallet 2 is tilted diagonally with respect to the transport direction, the rear portion 21a of the pallet body 21 comes into contact with one of the pair of guide portions 4 to generate a damping force in the transport direction. be.
  • the predetermined gap D is set to be wider than the gap for realizing friction reduction and wear suppression between the pallet 2 and the pair of guide portions 4.
  • the predetermined gap D is too large, when the pallet 2 is tilted obliquely with respect to the transport direction, the movement of the pallet 2 may be hindered or the positioning accuracy of the pallet 2 by the stopper 5 may be affected.
  • the upper limit of the predetermined gap D is such that when the pallet 2 is tilted diagonally with respect to the transport direction, the movement of the pallet 2 is not hindered or the positioning accuracy of the pallet 2 by the stopper 5 is not affected.
  • the predetermined gap D is preferably 0.3 mm or less.
  • the predetermined gap D is a gap between the pallet 2 and the guide portion 4.
  • FIG. 7 is a diagram schematically showing an example of the statically indeterminate time in the pallet transfer system 1 having the configuration of the present embodiment.
  • FIG. 8 is a diagram schematically showing the statically indeterminate time when there is no gap between the pallet 2 and the pair of guide portions 4.
  • the statically indeterminate time when the pallet 2 is stopped at a predetermined position can be shortened by the stopper 5.
  • the pallet transport system 1 includes a pallet 2 having a pallet body 21 on which a transport object M can be placed, a conveyor 3 having a transport surface 3a for transporting the pallet 2, and a conveyor 3 transport surface.
  • a guide portion 4 extending in the transport direction along 3a to guide the pallet 2 transported on the transport surface 3a of the conveyor 3, and a stopper 5 for stopping the pallet 2 at a predetermined position on the transport surface 3a.
  • the pallet 2 has a front end portion 27a of the support shaft 27 that comes into contact with the stopper 5, and a damping portion that generates a damping force in the transport direction with respect to the pallet 2 after the contact portion comes into contact with the stopper 5.
  • this damping portion is the rear portion 21a of the pallet body 21.
  • the guide portion 4 has a predetermined gap D between the pallet 2 located on the transport surface 3a and the transport surface 3a when the transport surface 3a is viewed from above, which allows the pallet 2 to be tilted diagonally with respect to the transport direction.
  • the damping portion is a rear portion 21a of the pallet 2 that comes into contact with the guide portion 4 in a state where the pallet 2 is tilted obliquely with respect to the transport direction.
  • the guide portion 4 When the transport surface 3a is viewed from above, the guide portion 4 has a predetermined gap D between the guide portion 4 and the pallet 2, so that the pallet 2 is tilted diagonally with respect to the transport direction. As a result, the rear portion 21a of the pallet body 21 comes into contact with the guide portion 4. By this contact, the force that the pallet 2 in contact with the stopper 5 rebounds in the direction opposite to the transport direction can be attenuated. Therefore, when the pallet 2 is stopped at a predetermined position on the transport surface 3a by the stopper 5, the statically indeterminating time of the pallet 2 can be shortened.
  • the presence of a predetermined gap D between the guide portion 4 and the pallet 2 causes the pallet main body 21 to come into contact with the guide portion 4 to generate a damping force. Therefore, it is possible to shorten the statically indeterminating time of the pallet 2 with a simple configuration.
  • the pallet 2 is located at the lower part of the pallet body 21, and has a wheel 22 that can rotate about an axle P parallel to the conveyor surface 3a of the conveyor 3, a wheel lock mechanism 23 that locks or unlocks the rotation of the wheel 22. Further have.
  • the wheel lock mechanism 23 causes the wheel lock mechanism 23 to unlock the rotation of the wheel 22, and the front end portion 27a of the support shaft 27 comes into contact with the stopper 5. In the non-existing state, the rotation of the wheel 22 is locked.
  • the wheel 22 located at the lower part of the pallet body 21 of the pallet 2 is held in a locked state until the front end portion 27a of the support shaft 27 comes into contact with the stopper 5. Therefore, the pallet 2 moves in the transport direction together with the transport surface 3a of the conveyor 3.
  • the wheel lock mechanism 23 unlocks the wheel 22.
  • the wheels 22 rotate with respect to the transport surface 3a of the conveyor 3, so that the pallet 2 does not move in the transport direction together with the transport surface 3a.
  • the operation of the wheel lock mechanism 23 increases the statically indeterminating time of the pallet 2 after the pallet 2 comes into contact with the stopper 5.
  • the pallet transfer system 1 having the pallet 2 operating as described above by applying each of the above configurations, when the pallet 2 is stopped at a predetermined position on the transfer surface 3a by the stopper 5, the pallet is stopped.
  • the statically indeterminate time of 2 can be shortened.
  • the wheel lock mechanism 23 has a lock portion 26 that stops the rotation of the wheel 22 by coming into contact with the wheel 22, and a spring 28 that urges the lock portion 26 to a first position in contact with the wheel 22.
  • the lock portion 26 is positioned at a second position away from the wheel 22 against the urging force of the spring 28.
  • the lock portion 26 is brought into contact with the wheel 22 by the spring 28 and the lock portion 26 is separated from the wheel 22 against the urging force of the spring 28 in a state where the front end portion 27a of the support shaft 27 is in contact with the stopper 5.
  • the spring 28 produces a large rebounding force. Therefore, in the configuration in which the lock portion 26 is urged to the first position in contact with the wheel 22 by the spring 28 in this way, the pallet 2 is stoppered 5 by applying the configuration of the present embodiment that generates a damping force in the transport direction. Therefore, the statically indeterminating time of the pallet 2 can be shortened more effectively when the pallet 2 is stopped at a predetermined position on the transport surface 3a.
  • the wheel 22 includes a plurality of wheels 22 arranged in the transport direction of the pallet 2.
  • the lock portion 26 includes a plurality of lock portions 26 that come into contact with each of the plurality of wheels 22.
  • the spring 28 urges the plurality of lock portions 26 to the first position in contact with the plurality of wheels 22.
  • the front end portion 27a of the support shaft 27 is in contact with the stopper 5, the plurality of lock portions 26 are positioned at a second position away from the wheel 22 against the urging force of the spring 28.
  • the pallet 2 has a plurality of wheels 22 arranged in the transport direction, the positions of the plurality of lock portions 26 in contact with the plurality of wheels 22 are controlled by the spring 28 and the front end portion 27a of the support shaft 27. be able to.
  • the pallet 2 is made larger by the spring 28 after being in contact with the stopper 5. Generates a rebounding force.
  • the spring 28 and the front end portion 27a of the support shaft 27 can control the locking or unlocking of the rotation of the plurality of wheels 22 arranged in the transport direction. Therefore, with a simple configuration, it is possible to control the locking or unlocking of the rotation of the plurality of wheels 22 arranged in the transport direction.
  • the contact portion of the pallet 2 that comes into contact with the stopper 5 includes a protrusion 27b that protrudes from the pallet body 21 in the transport direction.
  • the protrusion 27b protruding from the pallet 2 in the transport direction into contact with the stopper 5
  • the pallet 2 can be easily tilted diagonally with respect to the transport direction.
  • a part of the pallet 2 can be reliably brought into contact with the guide portion 4. Therefore, the force of the pallet 2 in contact with the stopper 5 rebounding in the direction opposite to the transport direction can be more reliably damped. Therefore, when the pallet 2 is stopped at a predetermined position on the transport surface 3a by the stopper 5, the statically indeterminating time of the pallet 2 can be shortened.
  • the pallet 2 of the present embodiment is a pallet having a pallet body 21 on which a conveyed object M can be placed and is conveyed on the conveyor surface 3a of the conveyor 3.
  • the pallet 2 is located below the pallet body 21 and has a wheel 22 that can rotate about the axle P and a wheel lock mechanism 23 that locks or unlocks the rotation of the wheel 22.
  • the wheel lock mechanism 23 includes a support shaft 27 extending in the transport direction of the pallet 2, a lock portion 26 fixed to the support shaft 27 and stopping the rotation of the wheel 22 by coming into contact with the wheel 22, and a support shaft 27 and a lock portion. 26 has a spring 28 that urges the lock portion 26 to a first position in contact with the wheel 22.
  • the support shaft 27 projects from the pallet body 21 in the transport direction.
  • the wheel 22 includes a plurality of wheels 22 arranged in the transport direction of the pallet 2.
  • the lock portion includes a plurality of lock portions 26 that come into contact with each of the plurality of wheels 22.
  • a plurality of lock portions 26 are fixed to the support shaft 27.
  • the spring 28 urges the plurality of locking portions 26 to the first position in contact with the plurality of wheels 22.
  • the rotation of the plurality of wheels 22 arranged in the transport direction of the pallet 2 can be locked or unlocked by moving the support shaft 27 in the transport direction. Therefore, with a simple configuration, it is possible to control the locking or unlocking of the rotation of the plurality of wheels 22.
  • the forward protrusion length of the support shaft 27 with respect to the pallet body 21 is the same on the left and right sides of the pallet 2.
  • the protruding length may be different on the left and right sides of the pallet 2.
  • FIG. 9 is a plan view showing a schematic configuration of the pallet 102 when the support shafts 27 and 127 have different forward protrusion lengths on the left and right sides.
  • FIG. 10 is a plan view schematically showing a state in which the pallet 102 conveyed by the conveyor 3 is in contact with the stopper 5.
  • reference numeral 101 is a pallet transfer system.
  • the forward protrusion length of the support shaft 127 located on the right is larger than the forward protrusion length of the support shaft 27 located on the left. Therefore, when the pallet 102 comes into contact with the stopper 5, the front end portion 127a of the support shaft 127 having a large protrusion length first comes into contact with the stopper 5.
  • reference numerals 27b and 127b are protrusions, respectively.
  • the contact portion in contact with the stopper 5 in the pallet 102 includes a plurality of protrusions protruding from the pallet body 21 in the transport direction. At least two of the plurality of protrusions 27b and 127b have different protrusion lengths in the transport direction.
  • the pallet 2 Since the protrusion lengths of at least two protrusions 27b and 127b in the transport direction are different, the pallet 2 is in contact with the guide portion 4 in a state of being tilted more obliquely with respect to the transport direction when the transport surface 3a is viewed from above. Can be made to. By this contact, the force that the pallet 2 in contact with the stopper 5 rebounds in the direction opposite to the transport direction can be attenuated.
  • the statically indeterminating time of the pallet 2 can be shortened more reliably.
  • the forward protrusion length of the support shaft located on the left may be larger than the forward protrusion length of the support shaft located on the right.
  • which of the support shafts located on the left and the support shafts on the right is to be increased in the forward protrusion length is determined in which direction the pallet 102 is obliquely transported. You can decide whether to tilt it.
  • FIG. 11 shows a schematic configuration of the pallet 202 of the pallet transfer system according to the second embodiment.
  • the pallet 202 has a plurality of wheels 222 that can rotate about a vertical axis Q extending in the vertical direction.
  • the configuration of the pallet transfer system is the same as the configuration of the pallet transfer system 1 of the first embodiment except for the configuration of the wheels 222. 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 wheel 222 of the pallet 202 will be described.
  • the pallet 202 has a pallet body 221 and a plurality of wheels 222.
  • the pallet body 221 is, for example, a rectangular parallelepiped member.
  • the plurality of wheels 222 are four wheels 222.
  • the wheels 222 are located at the lower portions of the four corners of the pallet body 221.
  • the wheels 222 rotate around an axle P extending parallel to the transport surface 3a of the conveyor 3.
  • the wheel 222 can rotate about the vertical axis Q extending in the vertical direction with respect to the pallet main body 221. That is, when the pallet 202 is viewed in the vertical direction, the rolling direction of the wheel 222 changes according to the rotation of the wheel 222 about the vertical axis Q.
  • the rolling direction of the wheel 222 means the direction in which the wheel 222 rotates when the pallet 202 is viewed in the vertical direction.
  • FIG. 12 is a plan view showing a state in which the pallet 202 is in contact with the stopper 5.
  • FIG. 13 is a plan view showing a state in which the pallet 202 comes into contact with the stopper 5 and then moves in the direction opposite to the transport direction with respect to the stopper 5.
  • reference numeral 201 is a pallet transfer system.
  • the rolling direction of the plurality of wheels 222 is substantially the same as the transport direction until the pallet 202 having the above configuration comes into contact with the stopper 5.
  • the plurality of wheels 222 of the pallet 202 that have moved in the direction opposite to the transport direction with respect to the stopper 5 are each vertical. It rotates around the axis Q. As a result, the rolling directions of the plurality of wheels 222 are different from each other. Then, the movement of the pallet 202 in the direction away from the stopper 5 is hindered.
  • the plurality of wheels 222 having the above configuration generate a damping force in the transport direction with respect to the pallet 202, as shown by the broken line arrow in FIG. Therefore, the plurality of wheels 222 of the present embodiment function as damping portions.
  • statically indeterminating time until the pallet 202 in contact with the stopper 5 stops at a predetermined position by the stopper 5 can be shortened.
  • the damping portion includes the wheel 222 located at the lower part of the pallet body 221.
  • the wheels 222 can rotate about an axle P parallel to the conveyor surface 3a of the conveyor 3 and can rotate about a vertical axis Q extending in the vertical direction.
  • the rolling direction of the wheels 222 and the transport direction of the pallet 202 may differ.
  • the friction between the wheel 222 and the transport surface 3a creates a resistance force against the movement of the pallet 202. Therefore, since the pallet 202 has the above-mentioned wheel 222, when the pallet 202 comes into contact with the stopper 5, when it receives a force that rebounds in the direction opposite to the transport direction, the force can be damped. Therefore, when the pallet 202 is stopped at a predetermined position on the transport surface 3a by the stopper 5, the statically indeterminating time of the pallet 202 can be shortened.
  • the wheel lock mechanism as in the first embodiment may be applied to the wheel 222 that rotates about the vertical axis Q as in the present embodiment.
  • the wheel 222 rotates about the vertical axis Q as described above, so that the pallet 202 is prevented from being separated from the stopper 5.
  • the pallet 202 moves in the transport direction together with the conveyor 3 as in the locked state of the wheels 22 in the first embodiment.
  • the pallet 202 further has a wheel locking mechanism that locks or unlocks the rotation of the wheels 222.
  • the wheel lock mechanism unlocks the rotation of the wheel 222 when the contact portion is in contact with the stopper 5, and locks the rotation of the wheel 222 when the contact portion is not in contact with the stopper 5. Since the wheel lock mechanism has the same configuration as the wheel lock mechanism 23 of the first embodiment, detailed description of the wheel lock mechanism will be omitted.
  • the right corner portion of the rear portion of the pallet 2 comes into contact with the guide portion 14.
  • the left corner of the rear portion of the pallet may come into contact with the guide portion.
  • the pallets 2, 102, 202 have protrusions 27b, 127b of the support shafts 27, 127 on the left and right sides of the front portion.
  • the pallet may have a protrusion of the support shaft on only one of the left and right sides of the front portion.
  • the pallet may have a protrusion of the support shaft at the center of the front portion in the left-right direction. In order to tilt the pallet with respect to the transport direction, it is preferable that the protrusions of the support shaft are located outside the center of all the pallets in the left-right direction. Further, the pallet may have three or more support shaft protrusions on the front portion.
  • the lock portion 26 for locking or unlocking the wheel 22 is fixed to the support shafts 27 and 127.
  • the pallet may have a configuration that locks or unlocks the wheels by another mechanism.
  • one lock portion may be fixed to the support shaft, or three or more lock portions may be fixed to the support shaft. That is, the number of lock portions fixed to the support shaft may be changed according to the arrangement of the wheels on the pallet.
  • the pallet transfer systems 1, 101, 201 convey a plurality of pallets 2, 102, 202, but only one pallet may be conveyed.
  • first embodiment and the second embodiment are described as different embodiments, but the configurations of the first embodiment and the second embodiment may be combined.
  • the present invention can be used for a pallet transport system that transports pallets by a conveyor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Intermediate Stations On Conveyors (AREA)
  • Special Conveying (AREA)

Abstract

Est fourni un système de transport de palettes dans lequel il est possible de raccourcir le temps de stabilisation d'une palette lorsque la palette est arrêtée par un dispositif d'arrêt. Ce système de transport de palettes (1) présente une palette (2) présentant un corps de palette (21) dans lequel un matériau (M) qui est convoyé peut être placé, un convoyeur (3) présentant une surface de transport (3a) destinée à transporter la palette (2), une paire de parties de guidage (4) qui s'étendent dans la direction de transport le long de la surface de transport (3a) du convoyeur (3) et qui guident la palette (2) qui est transportée sur la surface de transport (3a) du convoyeur, et un dispositif d'arrêt (5) qui arrête la palette (2) au niveau d'une position prescrite sur la surface de transport (3a). La palette (2) présente une section d'extrémité avant (27a) d'un arbre de support (27) qui vient en contact avec le dispositif d'arrêt (5), et une partie d'amortissement qui produit une force d'amortissement dans la direction de transport par rapport à la palette (2) après l'entrée en contact de la section de contact avec le dispositif d'arrêt (5). Dans le présent mode de réalisation, la partie d'amortissement est une section arrière (21a) du corps de palette (21).
PCT/JP2020/047555 2020-06-23 2020-12-18 Système de transport de palettes et palette WO2021260976A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202080102264.1A CN115916671A (zh) 2020-06-23 2020-12-18 托盘输送系统及托盘
JP2022532253A JPWO2021260976A1 (fr) 2020-06-23 2020-12-18

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JP2020108116 2020-06-23
JP2020-108116 2020-06-23

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WO2021260976A1 true WO2021260976A1 (fr) 2021-12-30

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Country Link
JP (1) JPWO2021260976A1 (fr)
CN (1) CN115916671A (fr)
WO (1) WO2021260976A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5642254Y2 (fr) * 1977-07-19 1981-10-02
JPS5873466A (ja) * 1981-10-28 1983-05-02 株式会社村田製作所 ワ−ク搬送装置
JPS6115230U (ja) * 1984-07-03 1986-01-29 パイオニア株式会社 搬送物の減速機構

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5642254Y2 (fr) * 1977-07-19 1981-10-02
JPS5873466A (ja) * 1981-10-28 1983-05-02 株式会社村田製作所 ワ−ク搬送装置
JPS6115230U (ja) * 1984-07-03 1986-01-29 パイオニア株式会社 搬送物の減速機構

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CN115916671A (zh) 2023-04-04
JPWO2021260976A1 (fr) 2021-12-30

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