JP5566658B2 - Pallet transport device - Google Patents

Description

  The present invention relates to a pallet transport device.

  Pallets are used to transport goods in various industries. Since the pallet is used repeatedly, the carried pallet is sorted based on the result and type of inspection before reuse, and is transported to a predetermined place for each sorting destination. A normal pallet is provided with a fork hole for inserting a fork on a side surface, and the pallet is transported by inserting the fork into the fork hole and supporting the pallet. For example, Patent Literature 1 and Patent Literature 2 describe an apparatus that conveys a pallet by inserting a fork into a hole of the pallet.

JP 2006-248726 A JP 2004-10288 A

  When a pallet is transported using a fork, the pallet to be transported must be placed so that the hole for the fork faces the direction of the fork. For this reason, the orientation of the pallet when placing it on the transport source is limited by the positional relationship between the placement location of the pallet and the fork. In addition, at the transport source and the transport destination, a space large enough to insert and remove the fork into and from the pallet hole is required. Furthermore, the layout of the pallet transport line has also been limited due to restrictions on the orientation of the pallet and the need to provide a space for inserting and removing the forks.

  Therefore, an object of the present invention is to provide a pallet transport apparatus that can transport pallets without considering the orientation of the pallet at the transport source and does not require a space for a fork.

The pallet transport device of the present invention has a mounting portion that constitutes a pair of substantially rectangular main surfaces for placing a load, and a side portion that is provided between a pair of placing portions and that constitutes four side surfaces. A pallet transporting device for transporting a pallet placed at a predetermined position of a transport source to a predetermined transport destination so that the main surface of the mounting portion is substantially in the horizontal direction, the lifter unit and The lifter unit includes a support unit that extends in a substantially vertical direction and supports the hand unit so that it can be moved up and down, and a movement that includes a power source for moving between a pallet transfer source and a transfer destination. And a hand portion that is spaced apart along a substantially horizontal direction and supports a first holding portion and a second holding portion for holding the pallet, and supports the first holding portion and the second holding portion. And a support frame part supported so as to be movable up and down along the support part, And the second holding portion presses one side surface, which is one of the four side surfaces of the pallet, in the direction of the second holding portion viewed from the first holding portion, and the second holding portion The pallet is held by pressing the opposite side surface, which is the side surface facing the one side surface of the pallet, in the direction of the first holding portion viewed from the second holding portion , and the first holding portion abuts against the one side surface. A movable pressing member having a movable abutting surface that is a contact surface for reciprocating, and reciprocating along the direction of the second holding portion as viewed from the first holding portion. The second holding portion has a fixed contact surface that is a contact surface for contacting the opposite side surface, and the first holding portion and the second holding portion are movable against the fixed contact surface. The first holding portion is provided on the support frame portion so as to be substantially parallel to the contact surface. The one side is pressed by operating the movable pressing member in the direction of the second holding portion with the cylinder while the movable contact surface is in contact with the one side, and the second holding portion is pressed by the first holding portion. The opposite side surface is pressed by the reaction of the pressing against the fixed contact surface by the pallet .

In the pallet conveying device of the present invention, one side surface of the pallet is pressed in the direction of the second holding unit by the first holding unit of the hand unit, and the opposite side surface of the pallet is pressed in the direction of the first holding unit by the second holding unit. Therefore, the pallet is held by the hand unit. Since the pallet is not supported by the hole for the fork but is pressed by pressing two opposite side surfaces, the pallet does not depend on the direction of the side surface provided with the hole for the fork. Can be held. The lifter unit supports the support frame unit with the support column unit, thereby supporting the hand unit holding the pallet and moving between the transport source and the transport destination by the moving means. Is possible. Further, since the pallet is held by pressing the one side surface and the opposite side surface of the pallet by the movable holding portion and the fixed holding portion without using the fork, a space for using the fork becomes unnecessary.
Further, since the movable pressing member of the first holding unit is pressed by the cylinder in the direction of the second holding unit, one side surface of the pallet is pressed in the direction of the second holding unit by the movable contact surface of the movable pressing member, The fixed contact surface of the second holding part is pressed by the opposite side surface. The fixed abutting surface presses the opposing side surface by the reaction of the pressing against the fixed abutting surface from the opposing side surface. Thereby, since the two side surfaces which oppose are pressed by the 1st holding | maintenance part and the 2nd holding | maintenance part, a pallet is hold | maintained reliably. Further, since the movable contact surface and the fixed contact surface are substantially parallel, one side surface and the opposite side surface can be appropriately pressed.

  In the pallet conveying device of the present invention, the cylinder is an air cylinder driven by air pressure.

  In this case, for example, the operation speed of the movable pressing member for pressing is improved as compared with a cylinder driven by hydraulic pressure.

  Further, in the pallet transport device of the present invention, when the lifter unit is at the transport source and the pallet is not placed at the predetermined position of the transport source, the hand unit waits for holding the pallet placed at the predetermined position of the transport source. In this state, the distance between the fixed contact surface and the movable contact surface is larger than the distance between one side surface and the opposite side surface of the pallet.

  In this case, the pallet can be placed at a predetermined position of the transport source without interfering with the first holding unit and the second holding unit.

  Further, in the pallet carrying device of the present invention, the hand unit includes a pallet support unit provided in a pair with the support frame unit, and the pair of pallet support units is a part of the pair of mounting units in the pallet. The pallet is supported by supporting the one side surface and the vicinity of the opposite side surface of the lower mounting portion, which is a mounting portion positioned below, from below. Note that the direction of gravity when the pallet transport device is arranged in a used state is the bottom.

  In this case, since the lower placement part of the pallet is supported from below by the pair of pallet support parts, the holding of the pallet by the hand part can be assisted.

  Further, in the pallet transport device of the present invention, when the lifter unit is at the transport source and the pallet is not placed at the predetermined position of the transport source, the hand unit waits for holding the pallet placed at the predetermined position of the transport source. In this state, the pallet contact part, which is a part of the pallet support part that comes into contact with the pallet placement part, is the position of the lower placement part of the pallet when the pallet is placed at a predetermined position of the transport source. The distance between the pallet abutting portions of the pallet support portions that are located below the pallet is smaller than the distance between one side surface and the opposite side surface of the pallet.

  In this case, the pair of pallet support portions are positioned below the lower pallet placement portion while keeping the distance between the pallet contact portions smaller than the distance between the one side surface and the opposite side surface of the pallet. Since it waits for the pallet to be placed at the predetermined position of the conveyance source, it is possible to place the pallet at the predetermined position of the conveyance source without interfering with the pallet support portion. In addition, in order to place the pallet at a predetermined position, the pallet support part is not retracted so that the distance between the pallet contact parts is larger than the distance between one side surface and the opposite side surface of the pallet, but the bottom of the pallet Since it is retracted by being positioned below the side placement portion, the pallet placed at a predetermined position can be quickly supported from below by raising the hand portion.

  Further, the pallet transport device according to the present invention includes a pair of rail portions that extend in the transport direction, which is a direction from the transport source to the transport destination, and are provided in parallel in a direction perpendicular to the transport direction and in a substantially horizontal direction. The first holding part and the second holding part are separated from each other in the extending direction of the rail part, and the normal direction of the fixed contact surface and the movable contact surface is along the extending direction of the rail part. It is provided in the support frame part, and the lifter part moves on the rail part while being guided by the rail part.

  In this case, the lifter unit can be moved along a predetermined transport path connecting the transport source and the transport destination. In addition, since the first holding part and the second holding part are provided apart from each other in the extending direction of the rail part, the extending direction of the rail part when the pallet is placed on the predetermined position of the transport source. It becomes possible to carry in a pallet between the 1st holding | maintenance part and 2nd holding | maintenance part in a predetermined position from the direction orthogonal to.

  Further, in the pallet transport device according to the present invention, the lifter portion includes a plate-like base portion having a main surface substantially parallel to the extending direction and the separating direction of the pair of rail portions, and a rail on a surface opposite to the main surface. A rotating member provided in a pair at a position corresponding to the portion and rotatable about the separation direction of the rail portion, and extending on a main surface of the base portion in a direction substantially perpendicular to the main surface. A support frame, a lifting chain provided so as to be capable of reciprocating along the supporting column, a lifting motor that drives the lifting chain, and a moving motor that is a power source of the lifter unit. The part is connected to the lifting chain, and moves up and down along the support column by the operation of the lifting motor, and the lifter unit rolls the rotating member on the rail by the driving force generated by the operation of the moving motor. However, it moves on the rail part.

  In this case, the lifting / lowering motor provided in the lifter unit can move the hand unit connected to the lifting / lowering chain along the support column of the lifter unit. In addition, the lifter can be moved along the rail while the rotating member is rolled on the rail by the driving force of the moving motor provided in the lifter.

  The pallet transfer device of the present invention is a pallet transfer source, a carry-in section where a pallet to be transferred is placed, and a pallet transfer destination. The carry-in part and the carry-out part are arranged side by side in the extending direction of the rail part in the vicinity of one side of the rail part.

  In this case, in a state where the lifter unit is at the transport source, the hand unit holds the pallet placed on the carry-in unit, the lift unit lifts the hand unit holding the pallet along the support column, and the lift unit Can move to any one of the plurality of carry-out units, and the held pallet can be placed on the carry-out unit. Thereby, conveyance of a pallet is implement | achieved. In addition, since the carry-out unit is provided for each pallet sorting destination, the pallet can be sorted by designating the carry-out unit for each pallet. Further, since the pallet is held by pressing one side surface and the opposite side surface of the pallet by the first holding portion and the second holding portion instead of means such as a fork, the carry-in portion and the carry-out portion are arranged in the vicinity of the side of the rail portion. And the distance between the carry-in part and the carry-out part can be reduced. As a result, the space occupied by the pallet transport device can be reduced.

  According to the present invention, it is possible to provide a pallet transport apparatus that can transport a pallet without considering the direction of the pallet at the transport source and does not require a space for a fork.

It is a perspective view of a pallet conveying apparatus. It is the top view, front view, and side view of a pallet conveying apparatus. It is a perspective view of a pallet. It is a perspective view of a carrying-in part. It is the front view and side view of the lifter part 30 and the hand part 10 of a pallet conveying apparatus. It is a perspective view of the hand part in the state holding the pallet. It is the top view of a hand part, a front view, and a side view. It is a figure which shows a mode that the hand part is carrying out the descent | fall operation | movement in order to hold | maintain a pallet when the pallet is in the state put in the carrying-in part. It is a figure which shows the state which the movable holding | maintenance part, the fixed holding | maintenance part, and the pallet support part reached to the height where a pallet is located by descending a hand part. The movable holding part, the fixed holding part and the pallet support part in the hand part are positioned at a height at which the pallet is positioned when the pallet is placed in the carry-in part in a state where the pallet is not placed on the carry-in part. It is a figure which shows the state which the hand part fell. It is a figure which shows the state in which the hand part hold | maintained the pallet.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a pallet transport device according to the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

  A pallet conveying apparatus 1 of this embodiment is shown in FIGS. FIG. 1 is a perspective view of the pallet transport device 1. 2A, 2B, and 2C are a top view, a front view, and a side view of the pallet transport device 1, respectively. The pallet transport device 1 is a device for transporting the loaded pallet 9 from the transport source to the transport destination, and has a function of holding, moving, and placing the pallet 9 holding the pallet 9. As shown in FIG.1 and FIG.2, the hand part 10, the lifter part 30, the rail part 6, the carrying-in part 7, and the carrying-out parts 8A-8C are provided. The pallet transport device 1 is a device for transporting a pallet, and has a function of holding, moving, and placing the pallet holding the pallet. The carry-in part 7 and the carry-out parts 8A to 8C are provided side by side in the extending direction of the rail part 6 in the vicinity of one side of the rail part 6 (the lower side in FIG. 2A).

  The pallet 9 to be selected is placed on the carry-in unit 7 (a predetermined position of the transfer source). The placement of the pallet 9 on the carry-in unit 7 is manually performed by an operator, for example. The pallet transport device 1 holds the pallet 9 placed on the carry-in unit 7, raises the held pallet 9 to a predetermined height, and moves on the rail unit 6 while being guided by the rail unit 6 while holding the pallet 9. The pallet that has been moved and held is placed on any of the carry-out portions 8A to 8C. When the pallet 9 is placed on any of the carry-out units 8A to 8C, if the pallet 9 has already been placed on the carry-out unit 8, the pallet transport device 1 uses the pallet 9 that has already been placed. A pallet that has been held is placed on the pallet, and a plurality of pallets 9 are stacked. In the present embodiment, the direction of gravity when the pallet transport device 1 is arranged in a state where it is used is assumed to be downward.

  The rail part 6 is for moving the lifter part 30 while guiding it. The pair of rail portions 6 extend along the transport direction (the left-right direction in FIGS. 2A and 2B) that is the direction from the transport source to the transport destination of the pallet 9, and is orthogonal to the transport direction. And parallel to each other in the direction and the substantially horizontal direction. The rail portion 6 has, for example, a groove provided along the extending direction of the rail portion 6 on the upper surface. This groove is for accommodating the rotation member 36 (see FIG. 5) of the lifter portion 30, and the lifter portion 30 is guided by the rail portion 6 by accommodating the rotation member 36 in the groove of the rail portion 6. It is possible to move while. Further, between the pair of rail portions 6, a moving chain 61 is provided along the extending direction of the rail portion 6.

  In addition, the pallet conveying apparatus 1 of the present embodiment includes a control unit (not shown) configured by a computer including a CPU and a storage unit. The control unit includes a holding and releasing operation of the pallet 9 by the fixed holding unit 12 and the movable holding unit 13 (see FIG. 7), a moving operation of the lifter unit 30 by the moving motor 33, and a hand unit 10 by the lifting motor 35. All the operations in the pallet conveying apparatus 1 such as the lifting and lowering operation are controlled. In addition, the pallet transport device 1 includes an instruction input unit (not shown) for issuing an operation instruction to the control unit. The instruction input unit includes, for example, a push button switch, a rotary switch, and the like. By operating these switches, all operations in the pallet transport apparatus 1 can be controlled.

  A plurality of carry-out units 8 </ b> A to 8 </ b> C are provided for each sorting destination of the pallet 9. The carry-out units 8A to 8C on which the pallets are placed are determined by, for example, an operator performing an input operation for designating any of the carry-out units 8A to 8C with respect to the instruction input unit provided in the pallet transport apparatus 1. Is done.

  Next, a pallet that is a target of conveyance and sorting in the present embodiment will be described. FIG. 3 is a perspective view of the pallet 9. As shown in FIG. 3, the pallet 9 is placed in a pair with a placement portion 90 </ b> A and a placement portion 90 </ b> B (lower placement portion) that constitute a pair of substantially quadrilateral main surfaces for placing a load. A side portion 91 provided between the portions 90A and 90B and constituting four side surfaces. The placement unit 90B is a placement unit located below the pair of placement units.

  Next, the carrying-in part 7 is demonstrated. FIG. 4 is a perspective view of the carry-in unit 7. Since the carry-out unit 8 has the same configuration as the carry-in unit 7, detailed description and illustration of the carry-out unit 8 are omitted. As shown in FIG. 4, the carry-in unit 7 includes a base unit 70, a pallet mounting unit 71, rotary shaft units 72 </ b> A and 72 </ b> B, gear units 73 </ b> A and 73 </ b> B, a motor 74, a drive chain 75, and a pallet feed chain 76.

  The base portion 70 forms a frame for providing the pallet placement portion 71 by four columnar members arranged at the positions of the vertices of the rectangle when viewed from the upper surface and beam members that connect the columnar members to each other. Configured.

  The pallet placing part 71 is a rectangular plate-like member having a length in the longitudinal direction substantially equal to the length of one side of the pallet 9, and is provided on the base part 70 so as to be opposed to and spaced apart from each other. . Since the pallet placing part 71 is provided such that the longitudinal direction thereof is substantially along the horizontal direction, the pallet 9 is placed on the pallet placing part 71 so that the main surfaces of the placing parts 90A and 90B of the pallet 9 are substantially horizontal. Can be placed on top. As shown in FIGS. 1 and 2, the carry-in part 7 is provided so that the longitudinal direction of the pallet placing part 71 is along a direction perpendicular to the extending direction of the rail part 6.

  At one end and the other end of the surface facing the opposing direction of the pallet placing portion 71, gear portions 73A and 73B that are rotatable about the opposing direction are provided, respectively, and the gear portion 73A and the gear portion 73B are provided. Between them, a pallet feed chain 76 is suspended. Opposing gear portions 73A are connected to each other by a rotating shaft portion 72A. Further, the gear portions 73B facing each other are connected to each other by the rotation shaft portion 72B.

  The motor 74 is provided on the base unit 70 and can be started and stopped by an operation instruction input from an operation unit (not shown). The rotating shaft portion 72A is connected via a drive chain 75 so that it can be driven by a motor 74. When the motor 74 is operated, the rotation shaft portion 72A rotates around the direction in which the pallet placement portion 71 faces, and the gear portion 73A connected to the rotation shaft portion 72A rotates. Then, the pallet feed chain 76 is driven in the longitudinal direction of the pallet placing portion 71. Thus, by driving the pallet feed chain 76 by operating the motor 74 in a state where the vicinity of any side surface of the mounting portion 90B of the pallet 9 is mounted on the vicinity of one end of the pallet mounting portion 71, The pallet 9 can be moved in the direction of the other end of the pallet placing part 71, and the placing part 90 </ b> B of the pallet 9 can be placed over the entire length of the pallet placing part 71. Therefore, the pallet 9 can be easily placed on the carry-in portion 7.

  Further, in the carry-out unit 8 having the same configuration, the pallet 9 is moved to the pallet placement unit by operating the motor and driving the pallet feed chain with the pallet 9 placed on the pallet placement unit. It can be moved from the other end to the one end. Thereby, the pallet 9 can be easily carried out from the carry-out unit 8.

  Next, the hand unit 10 and the lifter unit 30 will be described in detail. 5A and 5B are a front view and a side view of the hand unit 10 and the lifter unit 30, respectively. As shown in FIG. 5, the lifter unit 30 supports the hand unit 10 so as to be movable up and down. Details of the hand unit 10 will be described later, and then the lifter unit 30 will be described in detail. The lifter unit 30 includes a base unit 31, a column unit 32, a moving motor 33, a lifting chain 34, a lifting motor 35, and a rotating member 36.

  The base portion 31 is made of a plate-like member having a main surface substantially parallel to the extending direction and the separating direction of the pair of rail portions 6. On the main surface of the base 31, a support column 32, a moving motor 33, a lifting chain 34 and a lifting motor 35 are provided. Further, a rotating member 36 is provided on the downward surface of the base portion 31 opposite to the main surface so as to form a pair at a position corresponding to the rail portion.

  The column part 32 is formed of a columnar member provided so as to extend in a direction substantially orthogonal to the main surface of the base part 31, and extends in the extending direction of the rail part 6 (FIG. 5A ) In the left-right direction). A pulley for the elevating chain 34 is provided on the top of the support column 32.

  The moving motor 33 is provided on the base 31, and a moving gear (not shown) is connected to the rotation shaft of the moving motor 33. The moving motor 33 constitutes a power source of the lifter unit 30. Since this moving gear is meshed with the moving chain 61 (see FIGS. 1 and 2), the moving motor 33 can apply a driving force to the moving chain 61 via the moving gear. . Since the moving chain 61 is fixed along the extending direction of the rail portion 6, the base portion 31 can move along the rail portion 6 when the moving motor 33 is operated. Accordingly, the lifter unit 30 is movable between the carry-in unit 7 that is the conveyance source of the pallet 9 and the carry-out unit 8 that is the conveyance destination of the pallet 9.

  The raising / lowering motor 35 is for raising and lowering the hand unit 10, and is provided on the base unit 31. The elevating chain 34 is stretched between the rotating shaft of the elevating motor 35 and the top pulley of the column 32 while being along the column 32. The hand unit 10 is connected to the lifting chain 34. Therefore, by operating the elevating motor 35, the hand unit 10 can be moved up and down along the support column 32 while the hand unit 10 is supported by the lifter unit 30.

  The rotating member 36 is provided on the lower surface of the base portion 31 in a pair at a position corresponding to the rail portion 6 and is configured by a rotatable member such as a caster. The lifter unit 30 moves on the rail unit 6 while being guided by the rail unit 6 by moving while rotating on the rail unit 6 while the rotating member 36 is accommodated in the groove on the rail unit 6. Can do. The rotating member 36 and the moving motor 33 constitute moving means for the lifter unit 30.

  In this embodiment, the rail portion 6 has a groove on the upper surface, and the lifter member 30 is accommodated in the groove so that the lifter portion 30 can be moved along the rail portion 6. The configuration is not limited. For example, the rail portion 6 can be configured by a so-called linear rail. In that case, the rotating member 36 is not a member such as a caster but a ball bearing. With this ball bearing, the base portion 31 can smoothly move on the rail portion 6 formed of a linear rail.

  Next, the hand unit 10 will be described in detail. FIG. 6 is a perspective view of the hand unit 10 in a state where the pallet 9 is held. FIGS. 7A, 7 </ b> B, and 7 </ b> C are a top view, a front view, and a side view of the hand unit 10. 6 and 7, the hand unit 10 includes a support frame unit 11, a fixed holding unit 12 (second holding unit), a movable holding unit 13 (first holding unit), a pallet support unit 16, and a support unit operation. The cylinder 17 is used.

  The support frame portion 11 includes a pair of rod-like members 11A, a first frame member 11B, a second frame member 11C, a third frame member 11D, and a lifting chain connecting member 11E.

  The rod-shaped member 11A is a rod-shaped member that extends in a direction orthogonal to the extending direction of the support column 32 and the extending direction of the rail portion 6 and is spaced apart in parallel to the extending direction of the rail portion 6 in parallel. Is provided.

  The first frame member 11B, the second frame member 11C, and the third frame member 11D constitute a substantially rectangular frame that does not have one lower side when viewed from the separation direction of the rail portion 6, and this frame. The length of the first frame member 11B is longer than the length of one side of the placement portion of the pallet 9 so that the pallet 9 does not interfere with the pallet 9 when it is held, transported, and placed.

  The first frame member 11B is a pair of rod-shaped members that connect the pair of rod-shaped members 11A at the distal end portion and the substantially central portion, and extend to the outside of the rod-shaped member 11A in the separating direction of the rod-shaped member 11A. Each of the second frame members 11C is a rod-like member having one end connected to one end and the other end of each first frame member 11B and extending downward. One end and the other end are provided in pairs. The third frame member 11D is between the other end portions of the pair of second frame members 11C connected to the respective one end portions of the pair of first frame members 11B and the other end portions of the pair of first frame members 11B. It is a rod-shaped member that connects the other ends of the pair of second frame members 11C connected to each other.

  The ends of the pair of rod-like members 11A on the rail portion 6 side are respectively connected to the lifting chain connecting member 11E, and the lifting chain connecting member 11E is connected to and supported by the lifting chain 34 of the lifter portion 30. . Therefore, the support frame portion 11 can be lifted and lowered along the support column 32 by operating the lifting motor 35. In addition, a fixed holding portion 12, a movable holding portion 13, a pallet support portion 16 and a support portion operating cylinder 17 are connected to the support frame portion 11.

  The fixed holding portion 12 is a member that comes into contact with the side surface 91B while being pressed by the side surface 91B (opposing side surface) of the pallet 9 when the hand unit 10 holds the pallet 9, and the other end portion of the first frame member 11B. It is fixed to the third frame member 11D on the side. Further, the fixed holding portion 12 has a fixed contact surface 12 </ b> A that is a contact surface to be pressed by the side surface 91 </ b> B of the pallet 9. The fixed holding portion 12 presses the side surface 91B by the fixed contact surface 12A by the reaction of the press against the fixed contact surface 12A by the side surface 91B.

  The movable holding unit 13 is a member for pressing the side surface 91A (one side surface) of the pallet 9 when the hand unit 10 holds the pallet 9, and is a third frame member on one end side of the first frame member 11B. 11D. The movable holding portion 13 includes a movable pressing member 14 and a pressing air cylinder 15. The movable pressing member 14 is connected to the pressing air cylinder 15 and has a movable contact surface 14A that is a contact surface for pressing the side surface 91A. The pressing air cylinder 15 is a cylinder driven by air pressure. The pressing air cylinder 15 operates to press the movable pressing member 14 in the direction of the fixed holding portion 12. Thereby, the side surface 91 </ b> A of the pallet 9 can be pressed. Note that the direction of the fixed holding portion 12 as viewed from the movable holding portion 13, that is, the separation direction of the movable holding portion 13 and the fixed holding portion 12 is substantially parallel to the extending direction of the rail portion 6. Further, the fixed contact surface 12A of the fixed holding portion 12 and the movable contact surface 14A of the movable pressing member 14 are surfaces for contacting the mutually facing side surfaces 91B and 91A of the pallet 9, respectively, and are therefore substantially parallel. It is provided in the support frame part 11 so that it may become.

  Since the movable pressing member 14 of the movable holding portion 13 is pressed by the cylinder in the direction of the fixed holding portion 12, the side surface 91A of the pallet 9 is pressed in the direction of the fixed holding portion 12 by the movable contact surface 14A of the movable pressing member 14. Then, the fixed contact surface 12A of the fixed holding portion 12 is pressed by the side surface 91B. The fixed contact surface 12A presses the side surface 91B by the reaction of the pressing from the side surface 91B to the fixed contact surface 12A. Accordingly, the pallet 9 is pressed by the movable holding portion 13 and the fixed holding portion 12 so that the two side surfaces 91A and 91B are opposed to each other. In the present embodiment, the position of the loading portion 7 and the pallet 9 placed on the loading portion 7 is adjusted so that the movable pressing member 14 presses a portion of the side surface 91A of the pallet 9 where no hole for a fork exists. ing.

  The pallet support portion 16 is in the vicinity of the side portion 91 constituting the side surface 91A and the side surface 91B in the placement portion 90B (lower placement portion) located below the pair of placement portions 90A and 90B in the pallet 9. Is a member that supports the pallet 9 by being supported from below, and is connected to the second frame member 11 </ b> C of the support frame portion 11 in a pair via the support portion operation cylinder 17.

  The pallet support part 16 is connected to the support part operation cylinder 17 so that the distance between the paired pallet support parts 16 is shortened or lengthened by operating the support part operation cylinder 17. The pallet support part 16 can be operated. In this embodiment, two pairs of pallet support portions 16 and a support portion operating cylinder 17 are provided on the support frame portion 11, and the direction of the pair of pallet support portions 16 as viewed from the one pallet support portion 16 is the rail portion. 6 is substantially parallel to the extending direction.

  Next, details of the operation of raising / lowering the hand unit 10 along the lifter unit 30 will be described with reference to FIGS. 8 to 11. FIG. 8 is a diagram illustrating a state in which the hand unit 10 is moving down to hold the pallet 9 when the pallet 9 is placed on the carry-in unit 7. FIG. 9A is a top view showing a state in which the movable holding portion 13, the fixed holding portion 12 and the pallet supporting portion 16 have reached the height at which the pallet 9 is positioned as the hand portion 10 is lowered. 9 (b) is a view taken along the line bb of FIG. 9 (a), and FIG. 9 (c) is a view taken along the line cc of FIG. 9 (a). In this case, by operating the pressing air cylinder 15, the distance d1 between the movable contact surface 14A of the movable holding portion 13 and the fixed contact surface 12A of the fixed holding portion 12 is equal to the side surface 91A and the side surface of the pallet 9. It is kept longer than the distance between 91B. Further, by operating the support portion operating cylinder 17, the distance d2 between the pair of pallet support portions 16 is also kept longer than the distance between the side surface 91A and the side surface 91B of the pallet 9. Thereby, when the movable holding part 13, the fixed holding part 12, and the pallet support part 16 reach the height at which the pallet 9 is located by the lowering of the hand part 10, the interference between these members and the pallet 9 occurs. Is prevented. 8 and 9 show a state in which the hand unit 10 is moving downward when the pallet 9 is placed in the carry-in unit 7, but the pallet 9 is placed in the carry-in unit 7. Even if not, the state and operation of the movable holding portion 13, the fixed holding portion 12, and the pallet support portion 16 when the hand portion 10 is lowered are the same.

  10A shows that the movable holding portion 13, the fixed holding portion 12, and the pallet support portion 16 in the hand portion 10 are positioned at a height at which the pallet 9 is positioned when the pallet 9 is placed in the carry-in portion 7. FIG. It is a top view which shows a mode that the hand part 10 shifted to the state which waits holding | maintenance of a pallet after the hand part 10 descend | falls. Moreover, FIG.10 (b) is a bb arrow directional view of Fig.10 (a), FIG.10 (c) is a cc arrow directional view of Fig.10 (a). In FIG. 10, the pallet 9 is represented by a two-dot chain line, but the states and operations of the movable holding unit 13, the fixed holding unit 12, and the pallet support unit 16 described below are the same regardless of the presence or absence of the pallet 9. It is.

  In this case, by adjusting the standby position of the hand unit 10, the pallet contact portion 16 </ b> A, which is a portion of the pallet support portion 16 that contacts the placement portion 90 </ b> B of the pallet 9, 7 is located below the position of the placement portion 90B when placed on the surface. Further, by operating the support portion operating cylinder 17, the distance d4 between the paired pallet contact portions 16A is made shorter than the distance between the side surface 91A and the side surface 91B of the pallet 9. Further, by operating the pressing air cylinder 15, the distance d3 between the movable contact surface 14A of the movable holding portion 13 and the fixed contact surface 12A of the fixed holding portion 12 is set between the side surface 91A and the side surface 91B of the pallet 9. It is kept longer than the distance.

  As a result, when the pallet 9 is not placed on the carry-in unit 7 and the hand unit 10 is on standby to hold the pallet as shown in FIG. The pallet 9 to be transported can be placed on the carry-in unit 7 without interfering with the hand unit 10 while the hand unit 10 is lowered to the position shown in FIG. Accordingly, it is possible to reduce the time required from the delivery of the pallet 9 to the carry-in unit 7 to the conveyance of the pallet 9 to any of the carry-out units 8.

  Further, in order to prevent interference between the pallet 9 and the pallet support portion 16, the pallet support portion 16 is set so that the distance d4 between the pallet contact portions 16A is larger than the distance between the side surface 91A and the side surface 91B of the pallet 9. Rather than being retracted, the pallet 9 is retracted by being positioned below the placement portion 90B of the pallet 9, so that the pallet 9 placed on the carry-in portion 7 can be quickly supported from below by raising the hand portion 10. .

  FIG. 11A is a top view showing a state in which the hand unit 10 holds the pallet 9. Moreover, FIG.11 (b) is a bb arrow directional view of Fig.11 (a), and FIG.11 (c) is a cc arrow directional view of Fig.11 (a). In this case, the movable pressing member 14 is pressed in the direction of the fixed holding portion 12 by the operation of the pressing air cylinder 15, and the movable contact surface 14 </ b> A of the movable pressing member 14 presses the side surface 91 </ b> A of the pallet 9. . Then, by pressing the side surface 91A, the side surface 91B facing the side surface 91A presses the fixed contact surface 12A of the fixed holding portion 12. The side surface 91B is pressed by the fixed contact surface 12A by the reaction of the pressing to the fixed contact surface 12A by the side surface 91B. Therefore, the hand unit 10 presses the opposing side surface 91A and side surface 91B of the pallet 9 so as to be sandwiched between the movable holding unit 13 and the fixed holding unit 12, so that the pallet 9 can be held.

  Further, the two pairs of pallet support portions 16 support the pallet 9 by supporting the side surface 91A of the placement portion 90B of the pallet 9 and the vicinity of the side portion 91 constituting the side surface 91B from below. Thereby, holding of the pallet by the movable holding part 13 and the fixed holding part 12 can be assisted, and the pallet 9 can be reliably held and transported by the hand part 10.

  Here, FIG. 1 will be referred to again. In order to prevent the pallet 9 held by the hand unit 10 from coming into contact with the pallets 9 stacked in the carry-out unit 8 when the pallet 9 is conveyed from the carry-in unit 7 to any of the carry-out units 8. In addition, in the pallet transport device 1 of the present embodiment, for example, the hand unit 10 holding the pallet 9 can be raised to the highest position in the support column 32 of the lifter unit 30. Further, the control unit of the pallet transport device 1 stores the number of pallets 9 stacked in each carry-out unit 8, and the pallet is set to the maximum number of pallets stacked in each carry-out unit 8. It is good also as controlling to raise the hand part 10 holding the pallet 9 to the height corresponding to the length multiplied by the thickness of.

  Moreover, in order to prevent the pallet 9 and the pallet transport apparatus 1 from being damaged when the pallet 9 is placed on the carry-out unit 8, the pallet transport apparatus 1 of the present embodiment performs, for example, the following control. It can be. That is, the control unit (not shown) of the pallet transport device 1 stores the number of pallets 9 stacked in each carry-out unit 8, and the uppermost pallet 9 among the stacked pallets 9 is stored. The pallet 9 held by the hand portion 10 is lowered to a height close to the upper surface, and the distance between the pallet supporting portions 16 is set to the distance between the side surfaces 91A and 91B opposed to the pallet 9 by the operation of the support portion operating cylinder 17. After that, the pallet 9 held by the hand unit 10 is lowered to a height at which the upper surface of the uppermost pallet 9 of the stacked pallets 9 is in contact with the pallet 9 and the movable holding unit 13 is pressed. The operation of the air cylinder 15 can be controlled to release the pallet 9 that has been held.

  As described above, in the pallet transport device 1 of this embodiment, the side surface 91A of the pallet 9 is pressed in the direction of the side surface 91B by the movable holding unit 13 of the hand unit 10, and this side surface 91B is the fixed holding unit of the hand unit 10. The pallet 9 is held by the hand portion 10 by abutting against the pallet 12 while being pressed. For this reason, it becomes possible to hold | maintain the pallet 9 without depending on direction of the side surface in which the hole for the fork in the pallet 9 was provided. Since the lifter unit 30 supports the hand unit 10 holding the pallet 9 and can move between the transport source and the transport destination, the pallet 9 can be transported. Further, the pallet 9 is held by pressing the side surface 91A and the side surface 91B of the pallet by the movable holding portion 13 and the fixed holding portion 12 without using the fork, so that a space for using the fork becomes unnecessary.

  DESCRIPTION OF SYMBOLS 1 ... Pallet conveying apparatus, 6 ... Rail part, 7 ... Carry-in part, 8,8A-8C ... Unloading part, 9 ... Pallet, 10 ... Hand part, 11 ... Support frame part, 11A ... Rod-shaped member, 11B ... Frame member, 11C: Frame member, 11D: Frame member, 11E: Elevating chain connecting member, 12: Fixed holding portion, 12A: Fixed abutting surface, 13: Movable holding portion, 14: Movable pressing member, 14A: Movable abutting surface, 15 Air cylinder for pressing, 16 Pallet supporting part, 16A Pallet contact part, 17 Cylinder for supporting part operation, 30 Lifter part, 31 Moving part, 32 Supporting part, 33 Motor for moving, 34 Elevating chain, 35 ... elevating motor, 36 ... rotating member, 61 ... moving chain, 70 ... base part, 71 ... pallet mounting part, 72A, 72B ... rotating shaft part, 73A, 73B ... gear part, 74 ... motor 75 ... Chain, 76 ... pallet feeding chain, 90A, 90B ... mounting portion, 91 ... side, 91B, 91A ... side.

Claims (8)

A pallet having a pair of substantially rectangular main surfaces for placing a load, and a side portion that is provided between a pair of the above-described mounting portions and that forms four side surfaces. A pallet transport device for transporting the pallet placed at a predetermined position of the transport source so that the main surface of the placing portion is substantially along the horizontal direction, to a predetermined transport destination,
It has a lifter part and a hand part,
The lifter portion extends in a substantially vertical direction and supports the hand portion so as to be movable up and down, and a moving means including a power source for moving the pallet between the transport source and the transport destination. With
The hand portion is provided to be spaced apart along a substantially horizontal direction and supports the first holding portion and the second holding portion for holding the pallet, the first holding portion and the second holding portion, and the A support frame part supported so as to be movable up and down along the support part,
The hand portion presses one side surface, which is one of the four side surfaces of the pallet, in the direction of the second holding portion viewed from the first holding portion by the first holding portion, and The second holding portion holds the pallet by pressing an opposing side surface, which is a side surface facing the one side surface of the pallet, in the direction of the first holding portion viewed from the second holding portion ,
The first holding portion is connected to the movable pressing member having a movable pressing surface that is a contacting surface for contacting the one side surface, and the movable pressing member is connected to the first holding portion. A cylinder that reciprocates along the direction of the second holding portion as viewed from the side,
The second holding portion has a fixed contact surface that is a contact surface for contacting the opposite side surface,
The first holding part and the second holding part are provided on the support frame part so that the fixed contact surface and the movable contact surface are substantially parallel to each other.
The first holding portion presses the one side surface by operating the movable pressing member in the direction of the second holding portion by the cylinder while bringing the movable contact surface into contact with the one side surface.
The second holding portion presses the opposite side surface by a reaction of pressing against the fixed contact surface by the pallet pressed by the first holding portion.
A pallet conveying device characterized by the above. The pallet transport device according to claim 1 , wherein the cylinder is an air cylinder driven by air pressure. When the lifter is at the transport source and the pallet is not placed at a predetermined position of the transport source, the hand unit waits for holding the pallet placed at the predetermined position of the transport source. In the state that
The pallet conveyance device according to claim 1 or 2 , wherein a distance between the fixed contact surface and the movable contact surface is larger than a distance between the one side surface and the opposite side surface of the pallet. The hand part includes a pallet support part provided in a pair with the support frame part,
Each of the pair of pallet support portions has the one side surface and the vicinity of the opposite side surface of the lower mounting portion, which is a previous mounting portion positioned below the pair of previous mounting portions in the pallet, from below. The pallet conveying device according to any one of claims 1 to 3 , wherein the pallet is supported by supporting the pallet. When the lifter is at the transport source and the pallet is not placed at a predetermined position of the transport source, the hand unit waits for holding the pallet placed at the predetermined position of the transport source. In the state that
The pallet contact part, which is a part of the pallet support part that is in contact with the pallet placement part, is provided on the lower placement part of the pallet when the pallet is placed at the predetermined position of the transport source. Located below the position,
The pallet conveyance device according to claim 4 , wherein a distance between the pallet contact portions of the pair of pallet support portions is smaller than a distance between the one side surface and the opposite side surface of the pallet. A pair of rail portions that extend in a transport direction that is a direction from the transport source to the transport destination, and are provided in parallel in a direction perpendicular to the transport direction and in a substantially horizontal direction;
The first holding part and the second holding part are separated from each other in the extending direction of the rail part, and the normal direction of the fixed contact surface and the movable contact surface is the extending direction of the rail part. It is provided in the support frame part along,
The pallet conveyance device according to claim 1 , wherein the lifter unit moves on the rail unit while being guided by the rail unit. The lifter part is
A base part made of a plate-like member having a main surface substantially parallel to the extending direction and the separating direction of the pair of rail parts;
A rotating member provided in a pair on the surface opposite to the main surface at a position corresponding to the rail portion, and rotatable about the separation direction of the rail portion;
A column portion provided on the main surface of the base portion so as to extend in a direction substantially perpendicular to the main surface;
An elevating chain provided so as to be capable of reciprocating along the support column;
A lifting motor for driving the lifting chain;
A moving motor that is the power source of the lifter unit,
The support frame part is connected to the elevating chain, and is moved up and down along the column part by the operation of the elevating motor,
The pallet conveyance according to claim 6 , wherein the lifter unit moves on the rail unit while rolling the rotating member on the rail by a driving force generated by the operation of the moving motor. apparatus. A carry-in unit that is the transfer source of the pallet and in which the pallet to be transferred is placed;
The transport destination of the pallet, the transported pallets are stacked, and includes a plurality of unloading portions provided for each of the pallet sorting destinations,
The pallet transport device according to claim 6 or 7 , wherein the carry-in part and the carry-out part are arranged in the vicinity of one side of the rail part in the extending direction of the rail part.

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