JP6566466B2 - Conveying method of annular member - Google Patents

Description

  The present invention relates to a method for conveying an annular member. In particular, the present invention relates to a method for conveying an annular member suitable for efficiently transferring an annular member such as a sintered part in a laminated state.

  Various mechanical parts include a large number of annular members such as gears, sprockets, rings, and rotors. As a specific example, the annular member of the sintered body may be transferred to the sizing step or the cutting step after the sintering step, or the annular member after sizing or cutting may be further transferred to the next step.

  As a technique similar to the transfer of these sintered bodies, for example, Patent Document 1 discloses a method in which ring-shaped green compacts (annular members) before sintering are stacked and aligned on a boat for sintering. In this method, first, green compacts are placed in a V-shaped groove provided on a workbench in a posture in which the axis is placed sideways, and are sequentially arranged without gaps until a predetermined number is reached. Next, this group of green compacts was lifted together with a robot hand equipped with a pair of clamps, changed the direction of the green compact so that the axis was vertical, and moved to a predetermined position on the boat. Then, the clip is opened and placed. The sandwiching bracket of this robot hand lifts a group of green compacts by sandwiching the inner and outer peripheral surfaces of the ring-shaped green compact.

JP 2001-200303 A

  When transporting such an annular member, further efficiency and suppression of damage to the annular component are required.

  In the technique according to Patent Document 1, the annular members are once arranged on the V-shaped groove in a posture in which the axial center is set sideways (sideways), and then the annular member is oriented so that the axial center is vertical. It has been placed on the boat. Therefore, it is necessary to transfer in two stages, horizontally and vertically, and the efficiency of the transfer is not sufficient, and a work table having a V-shaped groove is also required.

  In particular, in a vertically placed state, a large number of vertically stacked laminates are arranged on the boat, so if the laminate collapses due to vibration during boat transfer, the adjacent laminates come into contact with each other, and The member may be damaged.

  The present invention has been made in view of the above circumstances, and one of its purposes is to provide a method for transporting an annular member suitable for efficiently transporting the annular member in a stacked state.

  Another object of the present invention is to provide a method for transporting an annular member that can suppress damage to the annular member that is transported in a stacked state.

The conveyance method of the annular member concerning one mode of the present invention includes the following storing process and transfer process.
Storage step: A plurality of annular members are stored in a cylindrical body as a stacked body, and the stacked body is supported by an inner peripheral projection that protrudes toward the inner peripheral side so as to have an opening at the center of the cylindrical body. .
Transfer process: The cylindrical body which passed through the said accommodation process is transferred from the predetermined position before conveyance to the predetermined position after conveyance.

  According to the method for transporting an annular member according to the invention, the annular member can be efficiently transported while being held in a laminated state.

In the conveyance method which concerns on embodiment, it is sectional drawing which shows the state which accommodated the annular member in the cylindrical body at the accommodation process. In the conveyance method which concerns on embodiment, it is explanatory drawing which shows the process in which the cylindrical body which accommodated the cyclic | annular member was arranged in parallel with a pallet. In the conveying method which concerns on embodiment, it is sectional drawing which shows the process in which an annular member is taken out from a cylindrical body at a taking-out process.

[Description of Embodiment of the Present Invention]
First, embodiments of the present invention will be listed and described.

(1) The conveyance method of the annular member which concerns on one form of this invention is equipped with the following storage process and transfer process.
Storage step: A plurality of annular members are stored in a cylindrical body as a stacked body, and the stacked body is supported by an inner peripheral protrusion that protrudes toward the inner peripheral side so as to have an opening at the center of the cylindrical body. .
Transfer process: The cylindrical body that has undergone the storage process is transferred from a predetermined position before transfer to a predetermined position after transfer.

According to said conveyance method, since an annular member is accommodated and conveyed in a cylindrical body in the lamination | stacking state, there exists the following effect.
-Since a plurality of annular members can be transported as a stacked body, they need not be placed horizontally and can be efficiently transported.
-Since the outer periphery of the laminated body is supported by the cylindrical body, even when the annular member is transferred together with the cylindrical body, the annular member does not collapse even if it is transferred to a certain degree of speed, and efficient conveyance can be performed. As the collapse of the annular member can be suppressed, even when a plurality of stacked bodies (cylindrical bodies) are arranged in parallel, the stacked members can be prevented from contacting each other and being damaged.
-The cylindrical body has an inner peripheral projection and has an opening at the center so that the annular member can be easily supported by the inner peripheral projection, and the annular member is stored in a stacked state in the cylindrical body. Cheap.

  (2) As one form of the transport method, in the storing step, the outer diameter is larger than the opening at the center of the cylindrical body between the lowermost annular member of the laminate and the inner peripheral projection, Examples include a configuration in which an intervening plate movable in the axial direction is interposed in the cylindrical body.

  According to the above conveying method, when the extrusion shaft is inserted from the opening of the cylindrical body in the subsequent process and the annular member is relatively pushed up and taken out together with the intervening plate, the end of the extrusion shaft may be in direct contact with the annular member. Therefore, damage to the annular member can be suppressed. Further, when a large hole is formed in the annular member, in order to relatively push up the annular member directly with the extrusion shaft, a sufficient contact area between the end surface of the extrusion shaft and the annular member cannot be secured. Therefore, it may be difficult to push up the annular member. Even in such a case, if there is an interposed plate, the extrusion shaft can stably push up the interposed plate regardless of the shape and size of the annular member, and the annular member can be efficiently and stably taken out.

  (3) As one form of the said conveyance method, the form which has the arrangement | sequence process which arrange | positions further the some cylindrical body which passed through the said accommodation process on a pallet is mentioned. In this embodiment, the transfer step transfers a plurality of cylindrical bodies together with the pallet.

  According to said conveyance method, many cyclic | annular members can be conveyed stably efficiently, without producing a collapse of a load by transferring several cylindrical bodies collectively with the pallet.

  (4) As one form of the conveying method according to the above (3), the pallet includes a form having a recessed base on which each cylindrical body is positioned and placed.

  According to the above conveying method, by fitting the cylindrical body into the recess pedestal, the cylindrical body can be prevented from tilting or falling on the pallet, and the stability when transferring the cylindrical body together with the pallet is improved. This can be further improved.

  (5) As one form of the said conveyance method, furthermore, the said cylindrical body and an extrusion axis | shaft are made relative using the extrusion shaft inserted in opening of the center part of the said cylindrical body in the predetermined position after the said conveyance. The form which has the taking-out process which takes out a predetermined number of annular members from a cylindrical body by making it move up and down is mentioned.

  According to said conveyance method, by inserting an extrusion axis | shaft from opening of a cylindrical body, an annular member can be pushed up relatively with respect to a cylindrical body, and an annular member can be easily taken out from a cylindrical body. Therefore, even if it includes even the process of taking out the annular member accommodated in the cylindrical body, efficient conveyance becomes possible.

  (6) As one form of the conveyance method which concerns on said (5), the said extraction process has the form which supports a laminated body with the interposition board with the said extrusion shaft.

  According to said conveyance method, since an extrusion axis | shaft contacts an interposition board and does not contact an annular member directly, damage to an annular member can be suppressed easily. Moreover, by taking out the annular member using the interposition plate, the annular member can be taken out stably without depending on the shape and dimensions of the annular member.

  (7) As one form of the said conveying method, the said storage process has the form performed using the lining chuck | zipper hold | maintained by pressing an annular member from the inner side to the outer side.

  According to the above conveying method, since there is no device protruding on the outer periphery of the annular member by using the lining chuck, the inner peripheral surface of the cylindrical body compared to the case of using the chuck that grips the annular member from the outer periphery. And the clearance between the outer peripheral surface of the annular member can be reduced. In connection with it, it is easy to suppress the shift | offset | difference of the annular members in a cylindrical body.

  (8) As one form of the said conveyance method, the form whose said annular member is a sintered compact is mentioned.

  According to said conveyance method, various sintered components can be conveyed efficiently.

[Details of the embodiment of the present invention]
A method for conveying an annular member according to an embodiment of the present invention will be described below with reference to the drawings. The same reference numerals in the figure indicate the same names. In addition, this invention is not limited to these illustrations, is shown by the claim, and is intended that all the changes within the meaning and range equivalent to the claim are included.

[Embodiment 1]
{Overview}
The embodiment of the present invention will be described based on FIGS. 1 to 3 by taking as an example a case where an annular member that has undergone sizing after sintering is conveyed to the next step.

  In this embodiment, a storage step of storing a plurality of annular members 10 in a stacked state in the cylindrical body 20, an arraying step of paralleling the cylindrical bodies 20 storing the annular members 10 on a pallet 50 (FIG. 2), A transfer step of transferring the cylindrical body 20 together with the pallet 50 from a predetermined position before transfer to a predetermined position after transfer. Furthermore, it has the extraction process which takes out the cyclic | annular member 10 from the cylindrical body 20 in the predetermined position after a transfer. In each of these steps, it is preferable that the annular member 10 is automatically stored, transported, and taken out using a robot hand. Hereinafter, each process will be described in detail.

{Storing process}
In the storing step, as shown in FIG. 1, a plurality of annular members 10 are stacked in a cylindrical body 20 and stored in a stacked body. In this example, the interposition plate 30 is housed in the bottom of the cylindrical body 20 together with the annular member 10. First, the annular member 10 to be conveyed will be described, and the cylindrical body 20, the interposed plate 30, and the robot hand used for storing the annular member 10 will be sequentially described.

(Annular member)
The annular member 10 is an object to be accommodated in the cylindrical body 20, and is typically a thin annular part having a thickness smaller than the width (diameter), and has a through-hole at the center thereof. In this example, a sintered machine component such as an inner rotor or an outer rotor of the oil pump rotor is used as the annular member 10. Such an annular member 10 is accommodated in the next cylindrical body 20 and conveyed.

(Tubular body)
The cylindrical body 20 is a member that stacks and stores a plurality of annular members 10 such that the axial direction thereof is along the axial direction of the cylindrical body 20, and the cylindrical body 22 having one end (upper part) opened, and the annular member 10. And an outer peripheral protrusion (not shown) as necessary.

-Cylinder main body The cylinder main body 22 is a member surrounding the outer periphery of the cyclic | annular member 10 (laminated body) stacked. Typically, as shown in FIG. 1, a cylindrical main body 22 having a circular cross section can be suitably used. Of course, the cross-sectional shape of the cylinder body 22 is not limited to a circle, and may be polygonal as long as the annular member 10 can be accommodated with a certain clearance from the inner peripheral surface of the cylinder body 22. It may be similar to the contour shape in plan view from the axial direction.

  It is preferable that the minimum inner dimension in the cross section of the cylinder body 22 such as the inner diameter or the opposite side dimension of the cylinder body 22 is slightly larger than the envelope circle diameter of the annular member 10. For example, it is preferable to prepare a plurality of types such as inner diameters of 60, 90, and 100 mm according to the dimensions of the annular member 10.

  The length of the cylinder body 22 can be appropriately selected according to the thickness of the annular member 10 and the number of stacked layers. For example, when the number of stacked annular members 10 is about 20 to 40, the length of the cylinder body 22 can be about 30 to 40 cm.

  As the material of the cylinder main body 22, a material having a lower hardness than the constituent material of the annular member 10 can be preferably used. This is because damage to the annular member 10 due to contact between the annular member 10 and the cylindrical body 20 can be easily suppressed. For example, when the annular member 10 is a steel-based sintered part, a resin can be suitably used as the material of the cylinder body 22. Specific examples of the resin include polyethylene, polypropylene, vinyl chloride, polyamide (nylon) and the like.

Inner peripheral protrusion The inner peripheral protrusion 24 is a protrusion that is provided on the other end side (bottom side) of the cylinder main body 22 and supports the stored laminated body from below. For example, an annular protrusion that protrudes from the other end (bottom) of the cylinder main body 22 toward the inner peripheral side can be mentioned. The inner peripheral protrusion 24 may be a sealing surface that closes the bottom of the cylindrical main body 22, but if an opening is formed in the central portion of the cylindrical body 20 such as an annular protrusion, an extrusion shaft, which will be described later, is formed in this opening. By inserting 60 (FIG. 3), the annular member 10 can be easily taken out from the cylinder body 22. The shape of the inner peripheral protrusion 24 does not need to be formed continuously in the circumferential direction, and may be a plurality of protruding pieces formed intermittently in the circumferential direction. In short, it is only necessary that the inner diameter of the opening formed in the central portion of the cylindrical body 22 is smaller than the outer diameter of the annular member 10 and has a strength capable of supporting the weight of the laminated body. As the material of the inner peripheral protrusion 24, the same material as that of the cylinder main body 22 can be preferably used. If the cylinder main body 22 is made of resin, the inner peripheral protrusion 24 is also preferably formed integrally with the cylinder main body 22 with resin.

Outer peripheral protrusion The outer peripheral protrusion (not shown) is a protrusion provided on the outer peripheral surface of the cylinder body 22 so as to protrude radially outward, and may be provided as necessary. For example, examples of the shape of the outer peripheral protrusion include an annular protrusion protruding in a flange shape from the outer peripheral surface of the cylinder main body 22 and a plurality of protruding pieces provided intermittently in the circumferential direction of the outer peripheral surface. This outer peripheral projection can be suitably used when the cylindrical body 20 itself is transferred regardless of whether or not the annular member 10 is accommodated. For example, if the cylinder body 22 is gripped by the robot hand from the outer periphery below the outer protrusion, the outer protrusion is applied to the robot hand, so that the cylindrical body 20 can be reliably held without dropping off. In addition, the outer peripheral protrusion can be used when the annular member 10 is taken out from the cylindrical body 20. For example, an extrusion shaft 60 to be described later is disposed in an opening formed inside the inner circumferential protrusion 24, and the cylindrical body 20 is held with respect to the extrusion shaft 60 in a state where the cylinder body 22 is gripped by a robot hand above the outer circumferential protrusion. Press down. At this time, since the outer peripheral projection is applied to the robot hand, the cylindrical body 20 can be surely pushed down, and the annular member 10 in the cylindrical body 20 can be relatively exposed from the upper opening of the cylindrical body 20. . The formation position of the outer peripheral projection may be any of the axial direction of the cylindrical main body 22, but in consideration of handling the cylindrical body 20 with a robot hand in a balanced manner, the position where the outer peripheral protrusion is not extremely biased to both ends of the cylindrical main body 22 Is preferred. As the material of the outer peripheral projection, the same material as that of the cylinder main body 22 can be preferably used as in the case of the inner peripheral projection 24. It is preferable to form the outer peripheral protrusion integrally with the cylinder main body 22 by resin. A function similar to this outer peripheral projection can also be achieved by forming a recess in the outer peripheral surface of the cylindrical body. For example, providing the annular recessed part which made the thickness of the cylindrical body thin locally, or the recessed part group formed in the at least opposing position of the circumferential direction is mentioned.

(Intervening plate)
The intervening plate 30 is a plate member interposed between the inner circumferential protrusion 24 and the lowermost annular member 10 and has a function of a bottom plate in the annular member 10 (laminated body). This plate material can be stored in the cylinder main body 22 and has an outer dimension supported by the inner peripheral projection 24, and has a material and shape having rigidity sufficient to prevent deformation due to the weight of the laminate. In the case of the cylindrical tubular body 20, a disc-shaped interposition plate 30 can be suitably used. As specific materials, various resins similar to the cylinder main body 22 can be used.

  The interposition plate 30 is housed so as to be movable in the axial direction without being fixed in the cylindrical body 20. Therefore, by inserting an extrusion shaft 60 to be described later from the opening inside the inner peripheral protrusion 24, the annular member 10 is pressed together with the intervening plate 30 at the end of the extrusion shaft 60, and the annular member 10 is relatively tubular. It can be exposed from the body 20.

  The interposition plate 30 may be accommodated in the cylindrical body 20 before the annular member 10 is accommodated by manual work or the like as appropriate. The intervening plate 30 once accommodated in the cylindrical body 20 can be used when the annular member 20 is stored again by being left in the cylindrical body 20 as it is even if the annular member 10 is taken out.

(Robot hand for annular members)
It is preferable to store the annular member 10 in the cylindrical body 20 using the annular member robot hand 40. As shown in FIG. 1, the robot hand 40 preferably uses a lining chuck that supports the through hole of the annular member 10 from the inside. With the lining chuck, the clearance between the cylindrical body 20 and the outer periphery of the annular member 10 can be reduced, and the cylindrical body 20 can be reduced. Accordingly, an excessive shift of the annular member 10 stacked in the cylindrical body 20 can be suppressed. The annular member robot hand 40 is assumed to have a length capable of holding and storing the annular member 10 up to the bottom of the cylindrical body 20.

{Arrangement process}
In the arranging step, a plurality of cylindrical bodies 20 in which the annular members 10 are stored in a stacked state are arranged in a standing state on the pallet 50.

(palette)
The pallet 50 is a member that supports the plurality of cylindrical bodies 20 in a predetermined parallel state. In this example, as shown in FIG. 2, a rectangular container-like pallet 50 having a bottom plate portion 52 and a side wall portion 54 and having an open top is used.

  The bottom plate portion 52 is provided with a recessed base 52h that is fitted in a state in which the cylindrical body 20 containing the annular member 10 is positioned. The recess pedestal 52h is a recess having an opening corresponding to the cross-sectional shape of the cylindrical body 20, and in this example, is a circular recess having an inner diameter slightly larger than the outer diameter of the cylindrical body 20. By fitting the bottom side of the cylindrical body 20 into the recess pedestal 52h, the plurality of cylindrical bodies 20 can be held in an aligned state on the pallet 50 without being displaced. The depth of the recess pedestal 52h only needs to be deep enough that the cylindrical body 20 containing the annular member 10 does not easily tilt or fall down. For example, about 10-30 mm is mentioned. What is necessary is just to determine the number of the recessed bases 52h according to the number of the cylindrical bodies 20 parallel per 1 pallet, for example, about 20-100 pieces are mentioned. The material of the bottom plate part 52 is not particularly limited as long as it has a strength capable of supporting a predetermined number of cylindrical bodies 20 in a parallel state. Various metals and resins can be suitably used.

  The side wall portion 54 is a wall portion that extends to a position higher than the upper end of the cylindrical body 20 fitted in the recess pedestal 52h and surrounds the periphery of the group of cylindrical bodies 20 arranged in parallel. In this example, as shown in FIG. 2, the side wall part 54 is comprised with the metal mesh. However, in FIG. 2, the side wall portion 54 on the back side is partially shown, and the side wall portions on the other surfaces are omitted. The side wall portion 54 may be made of a material having a strength capable of being stacked when a plurality of pallets 50 are stacked and conveyed in a predetermined number of stages.

(Robot hand for cylindrical body)
The transfer of the tubular body 20 to the pallet may be performed manually, but is preferably performed by a tubular body robot hand. Specific examples of this robot hand include a configuration in which the cylinder main body 22 is held from the outer periphery, or a configuration in which a plurality of locations at the opening edge of the cylinder main body 22 are held.

{Transfer process}
In the transfer step, the cylindrical body 20 in which the annular member 10 is stored is transferred individually or together with the pallet 50 in a state of being parallel to the pallet 50 described above. By this transfer, the annular member 10 is moved from a predetermined position (transfer source) before transfer to a predetermined position (transfer destination) after transfer.

  As this transfer means, when the cylindrical body 10 is individually transferred, a conveyor belt can be cited. When the entire pallet 50 is transferred, a forklift or the like can be used in addition to the conveyor belt. Of course, it can also be transported from the factory to another factory or customer.

  Specific examples of the transfer source and the transfer destination include the vicinity of the exit of the sintering furnace from which the sintered parts are taken out and the entrances of various next processes. The next process includes a machining process such as cutting and various heat treatments (steam treatment, carburizing and quenching treatment, induction hardening treatment, surface treatment such as plating), and an inspection process for sintered parts. Furthermore, the conveyance method of the present invention can also be used in a conveyance process in which a sintered part production factory is a transfer source and a customer is a transfer destination.

{Removal process}
After the cylindrical body 20 containing the annular member 10 is transferred to a predetermined position of the transfer destination, the annular member 10 is taken out from the cylindrical body 20 at the transfer destination in the removal step. For this take-out, it is preferable to use the extrusion shaft 60 and the robot hand 40 for the annular member already described in the storing step.

  As shown in FIG. 3, the extrusion shaft 60 is inserted through an opening formed inside the inner peripheral protrusion 24 of the cylindrical body 20, so that the annular member 10 is exposed from the upper opening of the cylindrical body 20. It is a bar material.

  It is preferable that the end of the extrusion shaft 60 has an outer diameter that can be inserted from an opening formed on the center side of the inner peripheral protrusion 24 and a size that can secure a sufficient contact area with the interposition plate 30 or the annular member 10. . This is because the annular member 10 is stably supported. In this example, an extrusion shaft 60 having a large diameter only at the tip is used.

  The extrusion shaft 60 only needs to move up and down relative to the cylindrical body 20 at its end. For example, as shown in FIG. 3, the extrusion member 60 is fixed, and the tubular member 20 containing the annular member 10 is pushed down by a holder 70 having a plunger or the like, so that the annular member 10 is opened at the upper opening of the tubular member 20. It can be exposed from. In addition, the tubular member 20 containing the annular member 10 is fixed, and the extrusion member 60 is inserted and raised from the opening formed inside the inner peripheral projection 24 of the tubular member 20, so that the annular member 10 is tubular. The shape 20 may be exposed from the upper opening. In any case, the annular member 10 can be exposed from the upper opening of the cylindrical body 20, and the exposed annular member 10 can be moved to the next process by the robot hand 40 for the annular member.

  In general, the cylindrical body 20 is pushed down and the push-out shaft 60 is raised stepwise. This stepwise moving unit may be a distance corresponding to the annular member 10 for one stage, or may be a distance corresponding to the thickness of the annular member 10 for several stages. The annular member 10 having the number of steps corresponding to the moving unit can be exposed from the upper opening of the cylindrical body 20.

(effect)
According to the method for transporting the annular member 10 described above, the following effects can be achieved by storing and transporting the plurality of annular members 10 in the cylindrical body 20 in a stacked state.

  Since the outer periphery of the laminated annular member 10 is surrounded by the cylindrical body 20, the annular members 10 are not easily displaced, and a large number of annular members 10 can be efficiently conveyed in a stable laminated state.

  Since the laminated annular member 10 is supported by the inner peripheral protrusion 24 in the cylindrical body 20, it does not fall off. For this reason, the annular member 10 can be stored in the cylindrical body 20 even if the cylindrical member 20 is deep, by using an appropriate robot hand or the like without temporarily stacking the annular member 10 once. The annular member 10 is removed from the cylindrical body 20 by inserting the extrusion shaft 60 from the opening formed on the center side of the inner peripheral projection 24, so that the cylindrical body 20 is deep from the uppermost stage to the lowermost stage. The annular member 10 can be easily taken out. That is, since the deep cylindrical body 20 can be used and a large number of annular members 10 can be accommodated in one cylindrical body 20, efficient conveyance is possible.

  Even if the plurality of cylindrical bodies 20 are conveyed in parallel in an upright state, the annular members 10 housed in the cylindrical bodies 20 do not come into contact with each other. Therefore, damage to the annular member 10 can be suppressed.

  By using the pallet 50, the plurality of cylindrical bodies 20 can be efficiently conveyed collectively in a standing state. In particular, by providing the recessed pedestal 52h on the pallet 50, the tubular body 20 can be prevented from tilting and falling, and the annular member 10 can be reliably conveyed.

  By using the interposition plate 30, direct contact between the extrusion shaft 60 and the annular member 10 can be avoided, and damage to the annular member 10 can be easily suppressed. Once the interposition plate 30 is stored in the cylindrical body 20, it can be repeatedly used as the bottom plate of the cylindrical body 20 when the annular member 10 is stored and taken out many times. If the contact surface of the interposition plate 30 with the extrusion shaft 60 is a flat surface, the annular member 10 can be stably supported by the extrusion shaft 60 stably even if the annular member 10 has an uneven surface.

  If the outer peripheral projection is provided, the cylindrical body 20 containing the annular member 10 can be held by the robot arm by supporting or pressing the outer peripheral projection, or the cylindrical body 20 can be relative to the extrusion shaft 60. Can be easily moved up and down.

  The method of transporting the annular member of the present invention, when transferring annular members such as sprockets and gears for various machines and oil pump rotors to other processes in the production factory, when shipping and transporting from the production factory to the customer, Or it can utilize suitably, when conveying and installing in the line which carries out the secondary processing of the annular member which arrived at the customer.

DESCRIPTION OF SYMBOLS 10 Cylindrical member 20 Cylindrical body 22 Cylindrical main body 24 Inner peripheral protrusion 30 Interposition board 40 Robot hand for annular members 50 Pallet 52 Bottom plate part 52h Recessed base 54 Side wall part 60 Extrusion shaft 70 Holder

Claims (6)

A housing step of housing a plurality of annular members in a cylindrical body as a laminated body, and supporting the laminated body with an inner peripheral projection that protrudes toward an inner peripheral side so as to have an opening at a central portion of the cylindrical body; ,
An arraying step of juxtaposing a plurality of cylindrical bodies on the pallet through the storing step;
Look including a transfer step of transferring to a predetermined position after conveying the tubular body has passed the storage step from a predetermined position before conveyance,
The pallet includes a bottom plate portion and a plurality of recessed bases formed on the bottom plate portion,
In the storing step, the outer diameter is larger than the opening at the center of the cylindrical body between the lowermost annular member of the laminate and the inner peripheral projection, and the axial movement within the cylindrical body is possible. Interposing the intervening plate of,
In the arranging step, the cylindrical bodies are positioned and placed on the concave bases,
In the transfer step, a plurality of cylindrical bodies are transferred together with the pallet.
The conveyance method of an annular member. The said cylindrical body is a conveyance method of the annular member of Claim 1 provided with the outer periphery protrusion which protrudes in the outer peripheral side. Furthermore, the cylindrical body is moved up and down relatively by using an extrusion shaft inserted into the opening of the central portion of the cylindrical body at a predetermined position after the conveyance, thereby moving the cylindrical body and the extrusion shaft relatively up and down. The conveyance method of the annular member of Claim 1 or Claim 2 which has the taking-out process which takes out a predetermined number of annular members from. The said extraction process is a conveyance method of the annular member of Claim 3 which supports a laminated body with the interposition board with the said extrusion shaft. 5. The method for transporting an annular member according to claim 1 , wherein the storing step is performed using a lining chuck that holds the annular member by pressing the annular member from the inside to the outside. The said annular member is a sintered compact, The conveyance method of the annular member of any one of Claims 1-5 .

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