JP2020186127A - Buffer device - Google Patents

Abstract

To provide a buffer device 1 that allows first-in first-out and can smoothly carry out a workpiece 2.SOLUTION: A buffer device 1 includes: a disk table 10; an upper plate 20; a work guide 60; and a drive motor 70. The drive motor 70 rotates the disk table 10 around an axis line S against the work guide 60. When this happens, the upper plate 20 rotates with the disk table 10, and thereby the work guide 60 guides the workpiece 2, allowing the workpiece 2 to be transported from a carry-in part 12 to a carry-out part 13 while being sequentially sliding on the upper plate 20.SELECTED DRAWING: Figure 1

Description

The present invention relates to a buffer device.

Conventionally, in the manufacturing process, a buffer device for temporarily stocking a work that has completed the previous process until it is carried out to the subsequent process has been proposed (see, for example, Patent Document 1).

This buffer device mounts a support rotatably supported around the axis of the rotation shaft and a plurality of workpieces rotatably supported via an arm support shaft arranged at the peripheral edge of the support. It is equipped with a stand.

By rotating the support, the works are sequentially arranged on a plurality of work mounting tables from a predetermined loading position, and the works are sequentially carried out to a predetermined loading position while stocking the works from the plurality of work mounting tables.

Japanese Unexamined Patent Publication No. 8-169508

The present inventor has examined two types of buffer devices, such as the following (a) conveyor parallel type buffer device and (b) stacking stocker type buffer device, with reference to the buffer device of Patent Document 1.

(A) Conveyor parallel type buffer device The conveyor parallel buffer device includes a plurality of conveyors for carrying out workpieces in the longitudinal direction, and a plurality of rotary tables arranged between two adjacent conveyors among the plurality of conveyors. ..

Of the plurality of conveyors, two adjacent conveyors have opposite directions for carrying out the workpiece. The plurality of rotary tables are arranged on one side in the longitudinal direction or the other side in the longitudinal direction of the plurality of conveyors.

Specifically, the plurality of rotary tables are alternately arranged on one side in the longitudinal direction and the other side in the longitudinal direction in the arrangement direction of the plurality of conveyors. The plurality of rotary tables sequentially rotate the workpieces carried by the upstream conveyor onto the downstream conveyor.

From this, while being stocked, the work is conveyed in a meandering manner in the order of loading section → conveyor → rotary table → conveyor → rotary table → conveyor → rotary table → conveyor → ... rotary table → carry-out section. Become.

In this type of buffer device, it is possible to carry out the work carried in first from the carry-in section to the carry-out section first. However, the work cannot be smoothly transferred from the conveyor to the rotary table between the conveyor and the rotary table, and the work may be temporarily stopped.

(B) Stacked stocker type buffer device The stacked stocker type buffer device stocks the workpieces in a stacked state in the vertical direction. In this type of type buffer device, the installation space can be reduced as compared with the conveyor parallel type buffer device.

However, it is not possible to store the work and carry it out at the same time, and when storing the work, there is a risk that the work to be processed in the post-process will be insufficient and the manufacturing equipment in the post-process will stop and the operating rate will decrease. There is.

In addition to this, in this type of buffer device, the work stocked later is carried out first.

In view of the above points, it is an object of the present invention to provide a buffer device capable of first-in first-out, which can smoothly carry out a work while stocking the work.

In order to achieve the above object, in the invention according to claim 1, the upper surface of the buffer device is formed in a disk shape centered on an axis (S) extending in the vertical direction and is formed upward. A disk table (10) having (10a) and further rotatably configured around an axis.
The guide (60) located on the upper side of the upper surface and
A drive source (70) that rotates the disk table around the axis with respect to the guide,
With
A carry-in portion (12) is formed on the outer surface of the upper surface in the radial direction centered on the axis, and a carry-in portion (12) for carrying the work transferred from the previous process is formed. A carry-out part (13) is formed to carry out the work in the process.
The guide guides the work to be conveyed by sliding the upper surface in a spiral shape centered on the axis from the carry-in part to the carry-out part.
When the drive source rotates the disk table with respect to the guide, the guide guides the work and slides the upper surface from the carry-in portion to the carry-out portion to transport the work while stocking it.

As described above, the work that has been brought into the carry-in section earlier can be carried out from the carry-out section to the subsequent process earlier. Therefore, first-in first-out is possible, and the work can be smoothly carried out while stocking the work.

In addition, the reference numerals in parentheses of each means described in this column and the scope of claims indicate the correspondence with the specific means described in the embodiment described later.

It is a perspective view which shows the whole structure of the buffer device in one Embodiment of this invention. It is an enlarged view of the disk table and the work guide of the buffer device in the said embodiment. It is sectional drawing which cut in the cut plane which includes the axis line and is parallel to the axis line in the buffer device in the said embodiment. It is the top view which looked at the disk table and the work guide from the upper side in the buffer device in the said embodiment. It is a top view of the work in the said embodiment. FIG. 5 is a sectional view taken along line VI-VI in FIG. FIG. 6 is a view taken along the line VII in FIG. It is a figure which looked at the table base of the disk table in FIG. 2 from the outside in the radial direction. It is a perspective view of the table base of the disk table in FIG. It is a top view which shows the state which combined the plurality of division plate portions in the said embodiment, and is the figure which shows the state which disassembled the plurality of division plate portions. It is a figure which shows the mechanical structure of the stop / escape part in the said embodiment. It is a figure which shows the electrical structure of the stop / escape part in the said embodiment. It is a flowchart which shows the work control process of the control circuit of FIG. It is a top view of the work in the 1st modification of the said embodiment. It is a top view of the work in the 2nd modification of the said embodiment. It is a top view of the work in the 3rd modification of the said embodiment.

Hereinafter, an embodiment of the buffer device 1 of the present invention will be described with reference to FIGS. 1 to 13 and the like.

The buffer device 1 of the present embodiment is a device that temporarily stocks the work 2 transferred from the previous process in the manufacturing process until it is carried out to the subsequent process.

As shown in FIG. 1, the buffer device 1 is arranged on the upper surface 3a of the pedestal 3. The upper surface 3a of the pedestal 3 is a base that supports the buffer device 1.

Specifically, as shown in FIGS. 1 to 4, the buffer device 1 includes a disk table 10, an oil pan 30, a support column 40, a bearing 50, and a work guide 60.

The buffer device 1 is provided with a drive motor 70, a timing belt 80, a stop / escape unit 90, a pull-in loader 100, and a take-out loader 110.

The disk table 10 is formed in a disk shape centered on the axis S. The central axis S in FIG. 3 is a virtual line extending in the vertical direction (that is, the vertical direction). The disk table 10 is formed with an upper surface 10a facing upward.

Specifically, as shown in FIGS. 8 and 9, the disk table 10 includes a table base portion 10A formed in a plate shape. The table base 10A is formed in a disk shape centered on the axis S. Further, the table base 10A has a plurality of through holes 11 penetrating in the vertical direction.

The table base 10A is supported by the support column 40 via a bearing so that the table base 10A can rotate freely about the axis S. The pillar 40 is a pillar member extending upward from the upper surface 3a of the pedestal 3. The disk table 10 is provided with a spindle 10b.

The plurality of through holes 11 are a plurality of second through holes formed in an elongated shape extending in the radial direction about the axis S. The plurality of through holes 11 serve to drop the oil adhering to the work 2 to the lower side of the disk table 10.

The spindle 10b is formed so as to extend downward from the lower surface of the table base 10A of the disk table 10. The main shaft 10b is formed in a columnar shape centered on the axis S. A support column 40 penetrates through the hollow portion of the spindle 10b.

As a result, the disk table 10 is rotatably supported with respect to the support column 40 about the axis S.

As the work 2 of the present embodiment, as shown in FIGS. 5, 6 and 7, a sliding surface 2a formed in a cap shape and sliding with respect to the upper plate portion 20 is formed on the lower side. There is.

As shown in FIG. 3, the disk table 10 of the present embodiment includes an upper plate portion 20 formed in an annular shape centered on the axis S. The upper plate portion 20 is formed in a plate shape along the table base portion 10A.

The upper plate portion 20 is arranged above the table base portion 10A. As a result, the upper plate portion 20 is supported from below by the table base portion 10A. The upper plate portion 20 is formed in a plate shape along the table base portion 10A.

As shown in FIG. 10, the upper plate portion 20 is provided with a plurality of through holes 21 penetrating in the vertical direction (that is, the vertical direction). The plurality of through holes 21 of the upper plate portion 20 are communicated with the plurality of through holes 11 of the disk table 10. The plurality of through holes 21 serve as a plurality of first through holes to drop the oil adhering to the work 2 to the lower side of the disk table 10.

The upper plate portion 20 is formed with an upper surface 10a formed toward the upper side. The upper surface 10a constitutes a sliding surface on which the work 2 is slid. The plurality of through holes 21 of the upper plate portion 20 play a role of lowering the sliding resistance of the work 2 with respect to the upper surface 10a of the upper plate portion 20.

The upper plate portion 20 of the present embodiment is configured by combining the divided plate portions 20a, 20b, 20c, and 20d. The dividing plate portions 20a, 20b, 20c, and 20d are each formed in a fan shape. The dividing plate portions 20a, 20b, 20c, and 20d are arranged in the circumferential direction about the axis S, respectively.

The oil pan 30 is arranged below the table base 10A of the disk table 10 and above the upper surface 3a of the pedestal 3. The oil pan 30 is formed so as to cover the disk table 10 from below.
The oil pan 30 is supported with respect to the support column 40. The oil pan 30 serves to receive the oil that has fallen through the through holes 21 of the upper plate portion 20 and the plurality of through holes 11 of the table base 10A.

The bearing 50 is formed so as to cover the main shaft 10b of the disk table 10 from the outside in the radial direction about the axis S with respect to the main shaft 10b. The bearing 50 is supported with respect to the support column 40.

The work guide 60 includes a guide portion 61 and a plurality of columns 62. The guide portion 61 is arranged above the upper plate portion 20. The guide portion 61 guides the work 2 from the carry-in portion 12 to the carry-out portion 13 by sliding the upper surface 10a of the upper plate portion 20 in a spiral shape about the axis S.

Here, the carry-in portion 12 is arranged on the upper plate portion 20 on the outer side in the radial direction about the axis S. The carry-out portion 13 is arranged on the upper plate portion 20 on the radial center side centered on the axis S.

Each of the plurality of columns 62 is formed so as to extend in the vertical direction. Each of the plurality of columns 62 is supported by the upper surface 3a of the pedestal 3. The plurality of columns 62 support the guide portion 61.

The drive motor 70 is a drive source arranged below the disk table 10. The drive motor 70 is supported by the upper surface 3a of the pedestal 3 via the support portion 71. The drive motor 70 is connected to the spindle 10b via a pulley 81 and a timing belt 80.

The drive motor 70 of the present embodiment applies a rotational force to the disk table 10. The pulley 81 is arranged on the lower side of the main shaft 10b. The pulley 81 is connected to the spindle 10b.

The stop / escape unit 90 stops or discharges the work 2 located at the rear side portion in the transport direction (hereinafter referred to as the carry-out rear portion 14) with respect to the carry-out portion 13. The carry-out rear portion 14 is a portion that is on the rear side of the carry-out portion 13 in the transport direction and is adjacent to the carry-out portion 13 in the transport direction.

The pull-in loader 100 is arranged radially outside the disk table 10 with the axis S as the center. The pull-in loader 100 feeds the work 2 transferred by the conveyor from the previous process to the carry-in unit 12.

The take-out loader 110 is arranged radially outside the disk table 10 with the axis S as the center. The take-out loader 110 takes out the work 2 located in the carry-out portion 13 and transfers it to a subsequent process.

Next, the stop / escape unit 90 of this embodiment will be described with reference to FIGS. 11 and 12.

The stop / escape portion 90 is supported by the support column 40. The stop / escape portion 90 includes an actuator 91 and a stopper portion 92. The actuator 91 displaces the stopper portion 92. The stopper portion 92 stops the rear work 2 or discharges the rear work 2 to the carry-out portion 13 due to displacement.

The actuator 91 is configured by an electric actuator or the like and is controlled by a control circuit 94 (see FIG. 12). The control circuit 94 is composed of a microcomputer or the like. The control circuit 94 controls the stopper portion 92 via the actuator 91 based on the detection value of the detection sensor 93.

The detection sensor 93 is composed of an optical sensor or the like, and is used for determining whether or not the work 2 is present in the carry-out unit 13. In the present embodiment, the upper plate portion 20 is provided with a carry-out stop portion 95 (see FIG. 11) for stopping the work 2 at the carry-out portion 13. The carry-out stop portion 95 is arranged on the front side in the transport direction with respect to the carry-out portion 13.

Next, the operation of the buffer device 1 of the present embodiment will be described.

Hereinafter, for convenience of explanation, a portion that is rearward in the transport direction with respect to the carry-out portion 13 and is adjacent to the carry-out portion 13 in the transport direction is hereinafter referred to as a carry-out rear portion 14.

First, the pull-in loader 100 sequentially feeds the workpieces transferred by the conveyor from the pre-process of the production line to the carry-in unit 12.

At this time, the drive motor 70 is rotated to the spindle 10b via the timing belt 80 and the pulley 81. Therefore, the disk table 10 rotates about the axis S with respect to the support column 40. As a result, the table base portion 10A and the upper plate portion 20 simultaneously rotate with respect to the work guide 60 about the axis S.

Therefore, the work 2 is sequentially guided by the guide portion 61 and is conveyed from the carry-in portion 12 to the carry-out portion 13 side while sliding on the upper surface 10a of the upper plate portion 20. As a result, while the plurality of works 2 are stocked on the upper surface 10a, the plurality of works 2 are sequentially conveyed from the carry-in portion 12 to the carry-out portion 13 side.

Here, for convenience of explanation, the work 2 located at the carry-out portion 13 is referred to as the front work 2, and the work 2 located at the carry-out rear portion 14 is referred to as the rear work 2.

For example, when the work 2 reaches the carry-out rear portion 14 and the rear work 2 comes into contact with the front work 2, the rear work 2 is pressed against the front work 2 in the transport direction.

In this case, the front work 2 is sandwiched between the carry-out stop portion 95 and the rear work 2. This makes it difficult for the take-out loader 110 to take out the work 2 from the carry-out portion 13.

On the other hand, the stop / escape unit 90 of the present embodiment controls the rear work 2 as described below to stop the rear work 2 from pressing the front work 2.

Hereinafter, the work control process of the stop / escape unit 90 will be described. The control circuit 94 executes the work control process according to the flowchart of FIG.

First, the control circuit 94 determines whether or not the work 2 exists in the carry-out unit 13 based on the detection value of the detection sensor 93 (step S100: determination unit).

At this time, in step S100, the control circuit 94 determines that the work 2 is present in the carry-out unit 13 and determines NO.

Then, the control circuit 94 controls the stopper portion 92 via the actuator 91 so that the stopper portion 92 (see the solid line in FIG. 6) protrudes between the carry-out portion 13 and the carry-out rear portion 14 (step S110: stop). Control unit).

As a result, the rear work 2 is stopped from being conveyed from the unloading rear portion 14 to the unloading portion 13. That is, the rear work 2 is held by the carry-out rear portion 14 while sliding on the upper plate portion 20. After that, the process returns to step S100.

Therefore, as long as the work 2 is present in the carry-out unit 13, the control circuit 94 repeats the NO determination in step S100 and the stop process (step S110).

As a result, the rear work 2 is held by the carry-out rear portion 14 while sliding on the upper plate portion 20.

At this time, when the pull-in loader 100 sequentially feeds the work 2 transferred by the conveyor from the previous process to the carry-in section 12, a plurality of works 2 sequentially slide from the carry-in section 12 toward the carry-out rear portion 14. While being transported.

As a result, a plurality of works 2 are stocked between the carry-in portion 12 and the carry-out portion 13 on the upper plate portion 20.

After that, the take-out loader 110 takes out the work 2 from the carry-out unit 13 and transfers it to a subsequent process.

Along with this, in step S100, the control circuit 94 determines that the work 2 does not exist in the carry-out unit 13 and determines YES.

Then, in step S120 (allowable control unit), the control circuit 94 controls the actuator 91 to retract the stopper portion 92 from between the carry-out portion 13 and the carry-out rear portion 14 (see the middle chain line in FIG. 6).

As a result, the work 2 is allowed to move from the unloading rear portion 14 to the unloading portion 13.

At this time, the work 2 is discharged from the carry-out rear portion 14 to the carry-out portion 13 while sliding on the upper plate portion 20. After that, the discharged work 2 is stopped at the carry-out section 13 by the carry-out stop section 95.

After that, the control circuit 94 repeats the determination process of step S100 and the stop process of step S110 (or the discharge process of step S110). Therefore, as for the plurality of works 2 on the upper plate portion 20, each time the take-out loader 110 takes out the work 2 from the carry-out portion 13, the work 2 is conveyed from the carry-out rear portion 14 to the carry-out portion 13.

Therefore, it is possible to prevent the rear work 2 located at the carry-out rear portion 14 from pressing the front work 2 located at the carry-out portion 13. As a result, it is possible to prevent the front work 2 from being sandwiched between the carry-out stop portion 95 and the rear work 2. As a result, the work 2 can be smoothly and sequentially carried out from the carry-out unit 13.

According to the present embodiment described above, the buffer device 1 includes a disk table 10, a work guide 60, and a drive motor 70.

The disk table 10 is formed in a plate-like shape having an upper surface 10a and a plate-like shape that supports the upper plate portion 20 from below, and is configured to be rotatable about an axis S. It is provided with a table base 10A.

The upper plate portion 20 is formed in a plate shape along the table base portion 10A. The drive motor 70 rotates the table base 10A of the disk table 10 about the axis S with respect to the work guide 60.

When the drive motor 70 rotates the disk table 10 with respect to the work guide 60, the table base 10A rotates together with the upper plate portion 20. As a result, the work guide 60 guides the work 2 and the work 2 is conveyed from the carry-in portion 12 to the carry-out portion 13 while sliding on the upper plate portion 20.

Therefore, the work 2 that has been brought into the carry-in section 12 earlier can be carried out from the carry-out section 13 to the subsequent process earlier. Therefore, it is possible to provide the buffer device 1 which can be first-in first-out and can smoothly carry out the work 2 while stocking the work 2.

The buffer device 1 of the present embodiment detects a stopper portion 92 for stopping the work 2 from being conveyed from the carry-out rear portion 14 to the carry-out portion 13, an actuator 91 for sliding the stopper portion 92, and a control circuit 94. It includes a sensor 93. The detection sensor 93 is a sensor for detecting whether or not a work exists in the carry-out unit 13.

When the control circuit 94 determines that the work 2 is present in the carry-out portion 13, the control circuit 94 controls the stopper portion 92 via the actuator 91 to stop the rear work 2 from being conveyed from the carry-out rear portion 14 to the carry-out portion 13. It is provided with S110.

When the control circuit 94 determines that the work 2 is not located on the carry-out portion 13, the control circuit 94 controls the stopper portion 92 via the actuator 91 to allow the rear work 2 to be conveyed to the carry-out portion 13.

Therefore, in the state where the front work 2 is present in the carry-out portion 13, the front work 2 is prevented from being pressed by the rear work 2 in order to stop the rear work 2 from being conveyed from the carry-out rear portion 14 to the carry-out portion 13. It can be suppressed. Therefore, the take-out loader 110 can smoothly carry out the work 2 from the carry-out unit 13 to the subsequent process.

In the present embodiment, the disk table 10 includes an upper plate portion 20 and a table base portion 10A that supports the upper plate portion 20 from below.

Therefore, when the work 2 slides on the upper surface 10a of the upper plate portion 20 and the upper surface 10a of the upper plate portion 20 is worn, the upper plate portion 20 is replaced to slide on the upper surface 10a of the upper plate portion 20. The dynamic resistance can be recovered.

In the present embodiment, the upper plate portion 20 has a plurality of through holes 21 penetrating in the vertical direction. The table base 10A has a plurality of through holes 11 penetrating in the vertical direction. Therefore, the oil adhering to the work 2 can be dropped through the plurality of through holes 21 and the plurality of through holes 11. As a result, oil can be easily dropped from the upper surface 10a of the upper plate portion 20.

In addition to this, in the present embodiment, the plurality of through holes 21 can reduce the sliding frictional force between the upper surface 10a of the upper plate portion 20 and the work 2. Therefore, the work 2 can be smoothly conveyed from the carry-in portion 12 to the carry-out portion 13.

In the present embodiment, the oil pan 30 is arranged below the disk table 10. Therefore, the oil pan 30 can receive the oil that has passed through the plurality of through holes 11 of the disk table 10. Therefore, it is possible to prevent the upper surface 3a of the pedestal 3 from being soiled with oil.

In the present embodiment, the upper plate portion 20 is configured by combining a plurality of divided plate portions 20a, 20b, 20c, and 20d arranged in the circumferential direction about the axis S. Therefore, the upper plate portion 20 can be divided and removed from the disk table 10. Further, the dividing plate portions 20a, 20b, 20c, and 20d are separately arranged on the table base portion 10A. Therefore, the upper plate portion 20 can be easily replaced.

(Other embodiments)
(1) In the above embodiment, the example in which the upper plate portion 20 is arranged on the upper side of the disk table 10 has been described, but the present invention is not limited to this, and the upper plate portion 20 may be deleted. In this case, when the disk table 10 rotates about the axis S, the work 2 is carried out from the loading section 12 to the loading section 13 while sliding on the upper surface 10a of the disk table 10.

(2) In the above embodiment, an example in which the cap-shaped work 2 is used has been described, but the present invention is not limited to this, and as shown in FIG. 14, a columnar work 2 may be used. Alternatively, as shown in FIG. 15, a spherical work 2 may be used. As shown in FIG. 17, a conical work 2 may be used.

(3) The present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope of the claims. Further, the above-described embodiments are not unrelated to each other, and can be appropriately combined unless the combination is clearly impossible. Further, in each of the above embodiments, it goes without saying that the elements constituting the embodiment are not necessarily essential except when it is clearly stated that they are essential and when they are clearly considered to be essential in principle. No. Further, in each of the above embodiments, when numerical values such as the number, numerical values, amounts, and ranges of the constituent elements of the embodiment are mentioned, when it is clearly stated that they are particularly essential, and in principle, the number is clearly limited to a specific number. It is not limited to the specific number except when it is done. In addition, in each of the above embodiments, when referring to the shape, positional relationship, etc. of a component or the like, the shape, unless otherwise specified or limited in principle to a specific shape, positional relationship, etc. It is not limited to the positional relationship.

(Summary)
According to the first aspect described in the above embodiment and some or all of the other embodiments, the buffer device comprises a disk table. The disk table has an upper surface formed in a disk shape centered on an axis extending in the vertical direction and is formed toward the upper side, and is further configured to be rotatable around the axis. Be prepared.

The disk table includes a guide arranged on the upper side of the upper surface and a drive source for rotating the disk table about an axis with respect to the guide.

On the outer side of the upper surface in the radial direction centered on the axis, a carry-in portion for carrying the work transferred from the previous process is formed, and on the radial center side of the upper surface centered on the axis, the work is used in the subsequent process. A carry-out part is formed to carry out.

The guide guides the work to be conveyed by sliding the upper surface in a spiral shape centered on the axis from the carry-in part to the carry-out part.

When the drive source rotates the disk table with respect to the guide, the guide guides the work so that the work is slid on the upper surface from the carry-in portion to the carry-out portion.

According to the second aspect, in the buffer device, the direction in which the work is conveyed guided by the guide is set as the conveying direction, the work located on the rear side of the conveying direction with respect to the carrying portion is set as the rear work, and the work is conveyed to the carrying portion. The part located on the rear side in the direction is referred to as the carry-out rear part.

The buffer device includes a stopper portion that stops the rear work from being conveyed from the rear side to the carry-out portion, an actuator that drives the stopper portion, and a determination unit that determines whether or not the work exists in the carry-out portion. Be prepared.

The buffer device includes a stop control unit that controls the stopper unit via an actuator to stop the rear work from being transported from the unloading rear portion to the unloading portion when the determining unit determines that the work exists in the unloading portion.

The buffer device provides a permissible control unit that controls the stopper unit via an actuator to allow the rear work to be transported from the unloading rear portion to the unloading portion when the determining unit determines that there is no work in the unloading portion. Be prepared.

As a result, when the work is present in the carry-out portion, it is possible to prevent the rear work from pressing the work existing in the carry-out portion. As a result, the work existing in the carry-out portion can be smoothly carried out.

According to the third viewpoint, the disk table has an upper plate portion formed in a plate shape having an upper surface and a plate portion.
It includes a table base that is formed in a plate shape that supports the upper plate from below and is rotatably configured around an axis.

When the drive source rotates the table base with respect to the guide, the upper plate portion rotates together with the table base, so that the guide guides the work and the work is conveyed from the carry-in portion to the carry-out portion while sliding on the upper surface.

Therefore, when the work slides on the upper surface of the upper plate portion and the upper surface of the upper plate portion is worn, the sliding resistance on the upper surface of the upper plate portion can be recovered by replacing the upper plate portion. ..

According to the fourth aspect, the upper plate portion is formed by combining a plurality of divided plate portions arranged in the circumferential direction about the axis.

As a result, when the upper plate portion is replaced, the plurality of divided plate portions are removed from the table base in an independent state, or the plurality of divided plate portions are separately arranged on the table base. Therefore, the upper plate portion can be easily replaced.

According to the fifth aspect, the upper plate portion has a plurality of first through holes for dropping the oil adhering to the work through the upper plate portion in the vertical direction. The table base has a plurality of second through holes for dropping oil that has passed through the plurality of first through holes in the vertical direction.

As a result, the oil adhering to the work can be easily dropped from the disk table.

According to the sixth aspect, the oil pan is provided below the disk table to receive the oil that has fallen through the plurality of first through holes and the plurality of second through holes.

As a result, it is possible to prevent the lower side of the disk table from being contaminated by the oil that has fallen from the disk table.

1 Buffer device 10 Disc table 20 Top plate part 30 Oil pan 40 Strut 50 Bearing 60 Work guide 70 Drive motor 80 Timing belt 90 Stop / escape part

Claims (6)

It has an upper surface (10a) formed in a disk shape centered on an axis (S) extending in the vertical direction and formed toward the upper side, and is further configured to be rotatable around the axis. Disk table (10) and
A guide (60) arranged on the upper side of the upper surface and
A drive source (70) that rotates the disk table about the axis with respect to the guide.
With
A carry-in portion (12) is formed on the outer surface of the upper surface in the radial direction centered on the axis, and a carry-in portion (12) for carrying the work transferred from the previous process is formed. Is formed with a carry-out portion (13) for carrying out the work in a subsequent process.
The guide guides the work to be transported by sliding the upper surface in a spiral shape centered on the axis from the carry-in portion to the carry-out portion.
When the drive source rotates the disk table with respect to the guide, the guide guides the work and slides the work from the carry-in portion to the carry-out portion on the upper surface to stock the work. A buffer device that conveys while letting. The direction in which the work is conveyed guided by the guide is defined as the transport direction, the work located on the rear side of the transport direction with respect to the carry-out portion is set as the rear work, and is on the rear side of the transport direction with respect to the carry-out portion. When the located part is the rear part (14) of carrying out,
A stopper portion (92) for stopping the rear work from being conveyed from the carry-out rear side to the carry-out portion, and
The actuator (91) that drives the stopper and
A determination unit (S100) for determining whether or not the work exists in the carry-out unit, and
When the determination unit determines that the work is present in the carry-out portion, the stopper portion is controlled via the actuator to stop the rear work from being conveyed from the carry-out rear portion to the carry-out portion. Part (S110) and
When the determination unit determines that the work does not exist in the carry-out portion, the stopper portion is controlled via the actuator to allow the rear work to be conveyed from the carry-out rear portion to the carry-out portion. Allowable control unit (S120) and
The buffer device according to claim 1. The disk table
A plate-shaped upper plate portion (20) having the upper surface and
A table base portion (10A) formed in a plate shape that supports the upper plate portion from below and rotatably configured around the axis is provided.
When the drive source rotates the table base with respect to the guide, the upper plate portion rotates together with the table base, so that the guide guides the work from the carry-in portion to the carry-out portion. The buffer device according to claim 2, wherein the work is conveyed while sliding on the upper surface. The buffer device according to claim 3, wherein the upper plate portion is formed by combining a plurality of divided plate portions (20a, 20b, 20c, 20d) arranged in the circumferential direction about the axis. The upper plate portion has a plurality of first through holes (21) for penetrating in the vertical direction and dropping oil adhering to the work.
The buffer device according to claim 3 or 4, wherein the table base has a plurality of second through holes (11) for dropping oil that has passed through the plurality of first through holes in the vertical direction. The buffer device according to claim 5, further comprising an oil pan (30) arranged below the disk table to receive oil that has fallen through the plurality of first through holes and the plurality of second through holes.

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