JP6707284B2 - Pallet carrier - Google Patents

Description

The present invention relates to a pallet transfer device that transfers a work by mounting it on a pallet.

BACKGROUND ART Conventionally, in a production line of various products, a pallet conveyance device that conveys a work in a state of being mounted on a pallet is generally used in order to sequentially move the work between a plurality of processes that configure the production line. It is used (Patent Document 1).

Further, in Patent Document 2, as such a pallet transfer device, a pair of linear pallet rails arranged so that the transfer directions are parallel to each other, and pallets arranged along the corresponding pallet rails are used. A pair of pallet transport parts that transport along the rails, and each pallet rail moves from one end of the pallet rail to the end of the other pallet rail in a semi-circular shape to move from one pallet rail to the other pallet rail. There is described a circulation type pallet transfer device including a pallet moving unit that moves a pallet. Further, in Patent Document 3, a pallet that moves a pallet from one pallet rail to the other pallet rail by horizontally moving between a pair of pallet rails arranged in parallel in a direction orthogonal to the pallet rail. A pallet transport device with a moving part is described.

JP, 03-264229, A JP, 2011-93032, A JP, 2007-21629, A

In the above-mentioned conventional pallet transporting device, the pallet transporting unit is equipped with the pallet and includes an endless belt having an uneven portion with which the uneven portion provided on the pallet can engage, and the endless belt is circulated. It is configured to transport pallets with. Therefore, when moving the pallet transported by the pallet transport unit to the end of one pallet rail toward the other pallet rail in a different transport direction by the pallet moving unit, the pallet is moved at the end of the pallet transport unit. It is necessary to move it to a position where the engagement between the uneven portion and the uneven portion is released.

However, in such a configuration, after the pallet moving unit moves the pallet to the other pallet carrying unit, the uneven portion of the pallet after the moving is surely made to the uneven portion of the endless belt of the other pallet carrying unit. It was difficult to engage. Therefore, depending on the case, there is a problem in that the pallet transport unit of the destination cannot restart the transport of the pallet moved to the other pallet rail.

The present invention has been made in view of such a problem, and an object of the present invention is to reliably transfer a pallet moved from one pallet transfer unit to another pallet transfer unit by the pallet transfer unit in the other pallet transfer unit. An object of the present invention is to provide a pallet transfer device capable of transferring.

The pallet transfer device of the present invention includes a pallet on which a work is mounted, and a ring-shaped circulating member having a concavo-convex portion on which the pallet is mounted and which can be engaged with a concave-convex portion provided on the pallet. A ring-shaped circulating body having a first pallet transporting unit for linearly transporting the pallet by a circulation operation of the body and an uneven portion on which the pallet is mounted and which can be engaged with an uneven portion provided on the pallet. A second pallet transporting unit that linearly transports the pallet in a transporting direction different from the first pallet transporting unit by the circulation operation of the circulator, and the pallet mounted on the first pallet transporting unit. A pallet transfer device for moving the pallet to the second pallet transfer part, wherein the transfer direction of the first pallet transfer part and the transfer direction of the second pallet transfer part are different from each other. And the pallet moving unit is on a center line between the first pallet carrying unit and the second pallet carrying unit, and is in the carrying direction of the first pallet carrying unit with respect to the first pallet carrying unit. It is adjacent in the vertical direction and is rotatable in one direction about a vertical axis at a position adjacent to the second pallet carrying section in the direction perpendicular to the carrying direction of the second pallet carrying section. An elevating and lowering rotary body that can be raised and lowered along a vertical axis, and a plurality of pallet holding portions that are provided at equal intervals in the circumferential direction around the vertical axis on the vertical and vertical rotary body and can hold the pallets, respectively. The lifting rotator in a state in which the pallet mounted on the first pallet transport unit is held by the pallet holding unit is raised along the vertical axis, and then is rotated about the vertical axis, and then the vertical axis is rotated. possess a driving unit for lowering along an axis, a, when a plurality of the pallet holding section, one of the pallet holding portion becomes capable of holding the position the pallet mounted on the first pallet conveying unit to, as another of the pallet holding portion adjacent to the circumferential direction with respect to said one of said pallet holder is capable of holding the position the pallet mounted on said second pallet conveying section, that are located It is characterized by

In the pallet transporting device of the present invention, in the above configuration, a first rail portion that extends along the first pallet transporting portion and movably supports the pallet, and a pallet that extends along the second pallet transporting portion. A second rail portion that movably supports the pallet, and the pallet holding portion is connected to the first rail portion or the second rail portion when the pallet holder is in the lowered state. It is preferable to have a holding rail capable of movably supporting the pallet, and a stopper piece that engages with an engaging projection of the pallet supported by the holding rail to prevent movement of the pallet along the holding rail. ..

In the pallet transporting device of the present invention, in the above configuration, it is preferable that the first pallet transporting unit and the second pallet transporting unit are belt conveyors in which the circulating member is an endless belt.

According to the present invention, it is possible to provide a pallet transfer device that can reliably transfer the pallet moved from one pallet transfer section to the other pallet transfer section by the pallet transfer section in the other pallet transfer section.

FIG. 1 is a plan view schematically showing a pallet transfer device that is an embodiment of the present invention. It is sectional drawing which follows the AA line in FIG. It is sectional drawing which shows the engagement state of the uneven|corrugated part of a circulating body, and the to-be-relieved part of a pallet. FIG. 6 is a plan view showing a state in which a pallet holding unit holds a pallet on a lifting/lowering rotary body. It is sectional drawing which follows the BB line in FIG. FIG. 6 is a cross-sectional view showing a state in which a lifting/lowering rotary body holding a pallet is moved upward by a drive unit from the state shown in FIG. 5. FIG. 9 is a plan view showing a state in which the lifting rotator is rotated to move the pallet from the first pallet transport unit to the second pallet transport unit.

Hereinafter, the present invention will be described more specifically by way of example with reference to the drawings.

A pallet transfer device 1 according to an embodiment of the present invention shown in FIGS. 1 to 3 transfers a work W (see FIG. 2) mounted on the pallet 11 together with the pallet 11. In the present embodiment, the case where the pallet transfer apparatus 1 is used for the purpose of sequentially moving the work W among a plurality of processes such as a processing process and an assembly process that configure the manufacturing line of various products is described. Show. In this case, the pallet 11 on which the work W is mounted can be configured to be sequentially stopped at a position corresponding to each process on the transport path and the work on the work W can be performed in that state. It is also possible to adopt a configuration in which work is performed on the work W in each process while moving at a low speed. Also, a plurality or a large number of pallets 11 can be sequentially transported. Note that the work W is omitted in FIG.

The pallet 11 on which the work W is mounted is formed in a plate shape and is transported in a horizontal posture. The pallet 11 is provided with a through hole 11a, and the work W can be mounted while holding the work W at the through hole 11a. The shape of the pallet 11 can be variously changed according to the type and shape of the work W, the work content in each process, and the like.

The pallet transfer device 1 includes a first rail part 12 and a second rail part 13 in order to movably support the pallet 11 and define a transfer path (transfer direction) of the pallet 11. Each of the first rail portion 12 and the second rail portion 13 has a uniform cross section and has a shape that extends straight in the longitudinal direction, and constitutes a so-called guide rail. On the other hand, a pair of sliders 14 is fixed to the lower surface of the pallet 11. Each of these sliders 14 is provided with a guide groove 14a having a cross-sectional shape corresponding to the cross-sectional shape of the first rail portion 12 and the second rail portion 13, respectively. The pallet 11 moves linearly along the first rail portion 12 or the second rail portion 13 by the respective sliders 14 engaging with the first rail portion 12 or the second rail portion 13 in the guide groove 14a. can do.

The first rail portion 12 and the second rail portion 13 are arranged such that their extending directions (longitudinal directions) are different from each other in a plan view, and are fixed to a gantry or the like (not shown). In the present embodiment, the first rail portion 12 and the second rail portion 13 are arranged such that their extending directions (longitudinal directions) are deviated from each other by 90 degrees in a plan view.

On the side of the first rail portion 12, a first pallet transfer portion 21 is provided along the first rail portion 12. Similarly, on the side of the second rail portion 13, a second pallet transport portion 22 is provided along the second rail portion 13.

The first pallet transport unit 21 includes at least a pair of pulleys 21a (only one is shown in FIG. 1) and a ring-shaped circulating body 21b that is wound around the pulleys 21a so as to surround the pulleys 21a. I have it. In the present embodiment, the circulation body 21b is an endless belt made of synthetic rubber, and is described later from one end of the first rail portion 12 along the first rail portion 12 on the side of the first rail portion 12. It is arranged so as to extend to the other end of the holding rail 34a. Further, one of the pulleys 21a is a drive pulley connected to a drive source (not shown), and when the drive source is activated, the circulating member 21b moves among the plurality of pulleys 21a so as to move along the first rail portion 12. It is designed to circulate around.

The circulator 21b is a toothed belt having an uneven portion 21c integrally provided on the surface thereof. In the illustrated case, the concave-convex portion 21c is provided on the surface of the circulating body 21b over the entire circumference thereof by providing convex portions extending in the width direction of the circulating body 21b at equal intervals in the circulating direction. ing. On the other hand, a pair of concave and convex portions 15 are fixed to the lower surface of the pallet 11. These concave and convex portions 15 are provided with concave and convex shapes on the lower surface corresponding to the concave and convex portions 21c, and can be engaged with the concave and convex portions 21c.

The pallet 11 is mounted on the circulation body 21b at the portion of the uneven portion 15. When the pallet 11 is mounted on the circulating body 21b, the uneven portion 15 engages with the uneven portion 21c, and the relative movement of the pallet 11 with respect to the circulating body 21b in the circulation direction is restricted. Therefore, when the drive source is activated and the circulation body 21b circulates around the plurality of pulleys 21a, the pallet 11 is linearly moved along the first rail portion 12 or the first pallet conveyance portion 21 by the circulation movement of the circulation body 21b. It is transported in a shape.

Similarly, the second pallet transport unit 22 includes at least a pair of pulleys 22a and a ring-shaped circulating member 22b that is wound around the pulleys 22a so as to surround the pulleys 22a. Like the circulating body 21b, the circulating body 22b is an endless belt made of synthetic rubber, and is disposed laterally of the second rail portion 13 along the second rail portion 13 from one end portion of the second rail portion 13. It is arranged so as to extend to the other end of a holding rail 34a described later. Further, one of the pulleys 22a is a drive pulley connected to a drive source (not shown), and when the drive source is operated, the circulating body 22b moves among the plurality of pulleys 22a so as to move along the second rail portion 13. It is designed to circulate around.

The circulating member 22b is a toothed belt integrally provided with an uneven portion 22c formed in the same shape as the uneven portion 21c of the circulating member 21b on the surface thereof.

The pallet 11 is mounted on the circulating body 22b at the portion of the uneven portion 15. When the pallet 11 is mounted on the circulating body 22b, the uneven portion 15 engages with the uneven portion 22c, and the relative movement of the pallet 11 with respect to the circulating body 22b in the circulation direction is restricted. Therefore, when the drive source is activated and the circulating body 22b circulates around the plurality of pulleys 22a, the pallet 11 is linearly moved along the second rail portion 13 or the second pallet conveying portion 22 by the circulating movement of the circulating body 22b. It is transported in a shape.

As described above, in the present embodiment, the first pallet transport unit 21 and the second pallet transport unit 22 are each configured as a belt conveyor that transports the pallet 11 in the linear direction.

In the present embodiment, the circulation bodies 21b and 22b are endless belts each having an uneven portion 21c integrally formed on the surface thereof, but the present invention is not limited to this, and the uneven portion 21c is fixed to the surface of the endless belt. It is also possible to use a structure having the above structure. Further, the circulating bodies 21b and 22b are, for example, endless chains as long as the circulating bodies 21b and 22b are provided with the concavo-convex portion 21c which can engage with the concavo-convex portion 15 of the pallet 11 and regulate the relative movement of the pallet 11. It is also possible to use other members.

Since the extending direction of the first rail part 12 and the extending direction of the second rail part 13 are different from each other, the carrying direction D1 of the first pallet carrying part 21 and the second pallet carrying part 22 are seen in a plan view. The transport directions D2 are also different from each other. That is, as shown in FIG. 1, the transport direction D1 of the first pallet transport unit 21 and the transport direction D2 of the second pallet transport unit 22 form an angle α. This angle α can be set to an arbitrary angle, but it is preferably larger than 0 degrees and smaller than 180 degrees. In the present embodiment, the angle α formed by the transport direction D1 of the first pallet transport unit 21 and the transport direction D2 of the second pallet transport unit 22 is 90 degrees. That is, the first pallet transport unit 21 and the second pallet transport unit 22 are arranged so that their end portions sandwich the center line L between the first pallet transport unit 21 and the second pallet transport unit 22. In addition, the transport directions D1 and D2 are arranged so as to be orthogonal to each other. The angle α formed by the transport direction D1 of the first pallet transport unit 21 and the transport direction D2 of the second pallet transport unit 22 is the second pallet transport unit 22, and the transport direction D2 is the first pallet transport unit 21. It is an angle corresponding to the rotation angle when it is assumed that it is rotated by a certain rotation angle from the posture that coincides with the transport direction D1. For example, when the second pallet transport unit 22 is arranged in a posture rotated by 30 degrees from the posture in which the transport directions D1 and D2 are coincident with each other, the angle α is 30 degrees, and from the posture in which the transport directions D1 and D2 are coincident with each other. When arranged in a posture rotated by 180 degrees, the angle α becomes 180 degrees, and the transport directions D1 and D2 are parallel and opposite to each other.

A pallet moving unit 31 is provided between the first pallet transport unit 21 and the second pallet transport unit 22 to move the pallet 11 from the first pallet transport unit 21 to the second pallet transport unit 22. .. By moving the pallet 11 that has been transported by the first pallet transport unit 21 along the linear transport direction D1 to the second pallet transport unit 22 by this pallet transport unit 31, the pallet 11 is transported to the second pallet transport unit. By the portion 22, it is possible to continue the conveyance in the conveyance direction D2 different from the first pallet conveyance portion 21.

The pallet moving unit 31 includes a lifting rotary body 32. In the case shown in the figure, the lifting/lowering rotary body 32 is formed in a plate shape that is substantially cross-shaped in a plan view, and is disposed between the first pallet transport unit 21 and the second pallet transport unit 22 and adjacent to these end portions. It is arranged. The raising/lowering rotating body 32 has, in its axis, one direction (a counterclockwise direction in FIG. 1) about a vertical axis O located on a center line L between the first pallet transporting section 21 and the second pallet transporting section 22. ), and can be moved up and down along the vertical axis O.

A drive unit 33 is provided in the pallet moving unit 31 in order to drive the lifting/lowering rotating body 32 in the rotation direction and the vertical direction. As shown in FIG. 2, the drive unit 33 includes a main body unit 33a configured to include a device (not shown) such as an electric motor for rotary drive and an actuator for vertical drive, and an upper surface of the main body unit 33a. And a drive rod 33b protruding. The axis of the drive rod 33b coincides with the vertical axis O, and the lifting/lowering rotary body 32 is fixed to the drive rod 33b in the horizontal posture at the axis thereof. With such a configuration, the drive unit 33 can raise and lower the elevating and lowering rotary body 32 along the vertical axis O and rotate the vertical axis O about the vertical axis O by a predetermined angle α/n. Since n=1 in the present embodiment, the lifting/lowering rotator 32 is rotated by the drive unit 33 about the vertical axis O by a predetermined angle 90.

Although details will be described later, the drive unit 33 raises the lifting/lowering rotator 32 to a predetermined position along the vertical axis O, then rotates the vertical rotator 32 about the vertical axis O by a predetermined angle, and then, vertically. It is controlled so as to descend to the original position along the axis O.

In order to hold the pallet 11 on the lifting/lowering rotary body 32, the lifting/lowering rotary body 32 has (360/α)×n (n is a natural number) pallets at equal intervals in the circumferential direction around the axis thereof. A holding portion 34 is provided. In the present embodiment, the angle α formed by the transport direction D1 of the first pallet transport unit 21 and the transport direction D2 of the second pallet transport unit 22 is 90 degrees, and n=1. The 32 includes four pallet holders 34.

Each of these four pallet holding portions 34 has the same cross-sectional shape as the first rail portion 12 or the second rail portion 13 and has such a length that the entire pair of sliders 14 of the pallet 11 can be simultaneously engaged. When the formed holding rail 34a and the pallet 11 are supported by the holding rail 34a, they are engaged with the columnar engaging projections 16 provided on the upper surface of the pallet 11 and follow the holding rail 34a of the pallet 11. And a stopper piece 34b for preventing the movement.

The four holding rails 34a are arranged at positions where the distances from the vertical axis O are equal to each other, and when the lifting/lowering rotary body 32 is at the predetermined rotation position shown in FIG. The rail portion 12 is arranged in the longitudinal direction at a slight interval, and the other one holding rail 34a is arranged in the longitudinal direction at a slight interval in the second rail portion 13. In this state, the pallet 11 can move from the first rail portion 12 to the holding rail 34a and can move from the holding rail 34a to the second rail portion 13.

Each of the stopper pieces 34b is movable back and forth from the vertical axis O side toward the corresponding holding rail 34a, and is biased by the spring member 35 toward the advanced position where the engaging projection 16 can be engaged. There is. Further, as shown in FIG. 2, a pair of cylinders 36 are provided below the lifting/lowering rotary body 32 so as to be adjacent to the first pallet transfer section 21 and the second pallet transfer section 22, respectively. The stopper piece 34b can be held in the retracted position where the engagement with the engagement protrusion 16 is released.

When the pallet 11 is in a state of being supported by the holding rail 34a, the holding by the cylinder 36 is released, the stopper piece 34b moves toward the advanced position, and engages with the engaging projection 16 at the notch portion at its tip. This prevents the pallet 11 from moving along the holding rails 34a and holds the pallet 11 on the lift rotary body 32. On the other hand, by operating the cylinder 36 from this state, the stopper piece 34b is moved backward and the engagement with the engaging projection 16 of the stopper piece 34b is released, whereby the pallet 11 can be moved along the holding rail 34a. Can be

Next, a procedure for carrying the pallet 11 carrying the work W by the pallet carrying device 1 having such a configuration will be described.

As shown in FIG. 1, the pallet 11 on which the work W is mounted is linearly conveyed by the first pallet conveying unit 21 along the conveying direction D1. At this time, when a plurality of processes are set on the side of the first pallet transport unit 21, the pallet 11 is stopped in each process and transported to the next process after the work is completed. The transport timing and the like can be set as appropriate.

Next, as shown in FIG. 4, when the pallet 11 linearly transported by the first pallet transport unit 21 along the transport direction D1 reaches the end of the first pallet transport unit 21, the pallet 11 is transferred. Are held by the lifting/lowering rotating body 32 of the pallet moving unit 31. That is, when the raising/lowering rotating body 32 is in the lowered position (the position shown in FIGS. 2 and 5), the holding rail 34a is in a state of being continuous with the first rail portion 12, so that the pallet 11 is at the end of the first pallet transport portion 21. When reaching the portion, the pallet 11 is in a state in which the pair of sliders 14 are supported by the holding rails 34a over the entire range. Then, in this state, as shown in FIG. 5, by releasing the holding of the stopper piece 34b by the cylinder 36, the stopper piece 34b is moved forward and engaged with the engagement projection 16. As a result, the pallet 11 can be held in the lifting/lowering rotary body 32. At this time, the pallet 11 is still mounted on the circulating body 21b of the first pallet transporting section 21, and the concavo-convex portion 15 thereof is still engaged with the concavo-convex section 21c of the circulating body 21b.

Next, as shown in FIG. 6, the raising/lowering rotating body 32 in a state where the pallet 11 is held by the pallet holding portion 34 is moved up to a predetermined position along the vertical axis O by the driving portion 33. When the raising/lowering rotary body 32 is raised to a predetermined position, the engagement between the uneven portion 15 and the uneven portion 21c of the circulating body 21b is released.

Next, as shown in FIG. 7, the drive unit 33 moves the lifting/lowering rotary body 32 to the drive rod 33b or the vertical axis O while the engagement between the uneven portion 15 and the uneven portion 21c of the circulating body 21b is released. It is rotated 90 degrees counterclockwise around the center and moved to above the second pallet transport unit 22. At this time, the engagement between the concavo-convex portion 15 and the concavo-convex portion 21c of the circulating body 21b is released, so that the lifting rotary body 32 is rotated by the engagement between the concavo-convex portion 15 and the concavo-convex portion 21c of the circulating body 21b. There is no hindrance.

Next, the drive unit 33 lowers the lifting/lowering rotary body 32 to the original position (the position shown in FIG. 5) along the vertical axis O. As a result, the lifting/lowering rotary body 32 holding the pallet 11 is mounted on the circulation body 22b of the second pallet transport unit 22. When the pallet 11 is mounted on the circulating body 22b, the concavo-convex portion 15 thereof engages with the concavo-convex portion 22c of the circulating body 22b, and the pallet 11 can be conveyed by the circulating body 22b. Therefore, by disengaging the engagement protrusion 16 of the stopper piece 34b by the cylinder 36 and causing the circulating body 22b of the second pallet transport unit 22 to circulate, the pallet 11 is moved to the second pallet transport unit 22 by the second pallet transport unit 22. The 1-pallet transport unit 21 can be continuously transported along a transport direction D2 different from the transport direction D1. Also in the transport path by the second pallet transport unit 22, the transport timing of the pallet 11 and the like can be set appropriately.

As described above, according to the present invention, the first pallet transport unit 21 and the second pallet transport unit 22 that transport the pallet 11 have the concave and convex portions 21c and 22c of the circulating bodies 21b and 22b, respectively, and the concave and convex portion 15 of the pallet 11. In the configuration in which the pallet moving unit 31 moves the pallet 11 from the first pallet carrying unit 21 to the second pallet carrying unit 22, in the configuration in which the pallet moving unit 31 moves the lifting rotator 32 to raise and lower the uneven portion 15 The pallet 11 is rotationally moved from the first pallet transport unit 21 to the second pallet transport unit 22 in that state, and then the pallet 11 is lowered to move the second pallet transport unit 22. Since it is mounted on the pallet, the uneven portion 15 of the pallet 11 moved from the first pallet transport unit 21 to the second pallet transport unit 22 can be securely engaged with the uneven portion 22c of the second pallet transport unit 22. it can. Therefore, the transport of the pallet 11 moved to the second pallet transport unit 22 by the pallet moving unit 31 can be reliably restarted in the second pallet transport unit 22.

It is needless to say that the present invention is not limited to the above-mentioned embodiment and can be variously modified without departing from the scope of the invention.

For example, in the above-described embodiment, the first pallet transport unit 21 and the second pallet transport unit 22 are arranged such that the angle α formed by the transport direction D1 and the transport direction D2 is 90 degrees. However, the arrangement is not limited to this, and the arrangement can be variously changed if the transport directions D1 and D2 are different from each other. In this case, the number of pallet holders 34 may be set to satisfy (360/α)×n (n is a natural number) in accordance with the arrangement of the first pallet carrier 21 and the second pallet carrier 22. The rotation angle of the lifting/lowering rotary body 32 may be set to an angle that satisfies α/n degrees. For example, in the present embodiment, four pallet holders 34 are provided on the lifting/lowering rotary body 32 with n=1 to rotate the lifting/lowering rotary body 32 by 90 degrees, but the present invention is not limited to this, and for example, n= As two, it is also possible to provide eight pallet holders 34 on the lifting/lowering rotary body 32 and rotate the lifting/lowering rotary body 32 by 45 degrees.

The first pallet transport unit 21 and the second pallet transport unit 22 may be arranged in parallel with each other such that the angle α formed by the transport direction D1 and the transport direction D2 is 180 degrees. In this case, the pallet moving unit 31 is not limited to the configuration in which the pallet moving unit 31 is arranged at the end of the first pallet conveying unit 21 and the second pallet conveying unit 22, but the pallet moving unit 31 is not limited to the first pallet conveying unit 21 and the second pallet conveying unit 22. It is also possible to adopt a configuration in which it is arranged in an intermediate portion of the portion 22 or the like.

By further combining a pallet transporting unit having the same configuration as the first pallet transporting unit 21 and the second pallet transporting unit 22, for example, the pallet transporting device 1 having an annular transporting route such as a triangular shape, a quadrangular shape, or another polygonal shape. It can also be configured. In this case, since the pallet 11 can be circulated in the transport path, it is possible to efficiently transport the pallet 11 without having to return the pallet 11 that has reached the final process to the first process.

Further, in the above-described embodiment, the first pallet transport unit 21 and the second pallet transport unit 22 are arranged so that the angle α formed by the transport direction D1 and the transport direction D2 is 90 degrees. However, the angle α may be 180 degrees or more. In this case, the heights of the first pallet transport unit 21 and the second pallet transport unit 22 may be different so that the first pallet transport unit 21 and the second pallet transport unit 22 are three-dimensionally intersected. .. When the first pallet transport unit 21 is arranged to intersect the second pallet transport unit 22 in a three-dimensional manner, the pallet moving unit 31, for example, the lifting rotator 32 is lowered to correspond to the first pallet transport unit 21. In order to correspond to the configuration, the second pallet transport unit 22 is raised to a position higher than the second pallet transport unit 22, is rotated by a predetermined angle, and is then lowered to a position corresponding to the second pallet transport unit 22. Can be made

1 Pallet Conveying Device 11 Pallet 11a Through Hole 12 First Rail Part 13 Second Rail Part 14 Slider 15 Concavo-convex Part 16 Engagement Projection 21 First Pallet Conveying Part 21a Pulley 21b Circulator 21c Concavo-convex Part 22 Second Pallet Conveying Part 22a Pulley 22b Circulator 22c Concavo-convex part 31 Pallet moving part 32 Elevating rotator 33 Drive part 33a Main body part 33b Drive rod 34 Pallet holding part 34a Holding rail 34b Stopper piece 35 Spring member 36 Cylinder W Work D1 First pallet transfer part transfer direction D2 Transfer direction of second pallet transfer section α Angle L Center line O Vertical axis

Claims (3)

A pallet on which the work is mounted,
A first pallet that is equipped with the pallet and that has a ring-shaped circulating member that has an uneven portion that can be engaged with an uneven portion provided on the pallet, and that conveys the pallet linearly by the circulating operation of the circulating member. A transport section,
The pallet is mounted, and a ring-shaped circulating body having a concave-convex portion with which the concave-convex portion provided on the pallet can engage is provided, and the pallet is referred to as the first pallet conveying unit by the circulation operation of the circulating body. A second pallet transport unit that transports linearly in different transport directions;
A pallet transfer device comprising: a pallet transfer unit that moves the pallet mounted on the first pallet transfer unit to the second pallet transfer unit,
The transport direction of the first pallet transport unit and the transport direction of the second pallet transport unit are different from each other ,
The pallet moving unit is on a centerline between the first pallet carrying unit and the second pallet carrying unit, and is perpendicular to the first pallet carrying unit in the carrying direction of the first pallet carrying unit. And a vertical axis that is adjacent to the second pallet transport section and is adjacent to the second pallet transport section in a direction perpendicular to the transport direction of the second pallet transport section. And a plurality of pallet holders that are provided at equal intervals in the circumferential direction around the vertical axis and that can hold the pallets, respectively. 1 The lifting/lowering rotary body in a state in which the pallet mounted on the pallet transport section is held by the pallet holding section is moved up along the vertical axis, and then is rotated about the vertical axis, and then the vertical axis is moved to the vertical axis. have a, a drive unit for lowering along,
When a plurality of the pallet holders is in a position where one of the pallet holders can hold the pallet mounted on the first pallet conveying unit, the plurality of pallet holders are circumferentially arranged with respect to the one pallet holder. as addition to the pallet holding portion adjacent is capable of holding the position the pallet mounted on said second pallet conveying portion, pallet conveying apparatus characterized that you have been placed. A first rail portion extending along the first pallet conveying portion and movably supporting the pallet; and a second rail portion extending along the second pallet conveying portion and movably supporting the pallet; Further has
The pallet holding part is a holding rail capable of movably supporting the pallet in a continuous manner with the first rail part or the second rail part when the lifting/lowering rotary body is in a lowered state, and is supported by the holding rail. The pallet conveying device according to claim 1, further comprising a stopper piece that engages with an engaging protrusion of the pallet and prevents the pallet from moving along the holding rail. The pallet transfer device according to claim 1 or 2 , wherein the first pallet transfer unit and the second pallet transfer unit are belt conveyors in which the circulating member is an endless belt.

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