JP7095650B2 - Grease supply method for meandering correction device - Google Patents

Description

The present invention relates to a method for supplying grease to a meandering correction device.

As a method for manufacturing an electrode of a fuel cell, a method is known in which a catalyst layer and an MPL (Micro Porous Layer) formed on a base material sheet are transferred to an electrolyte membrane and then cut. When manufacturing the electrodes of a fuel cell, the web is pulled out from a roll in which a web such as a base sheet is wound around a core material, and the web is continuously processed.
For example, Patent Document 1 discloses an electrode manufacturing system including a meandering correction device for correcting meandering of a web.

Japanese Unexamined Patent Publication No. 2014-226635

The inventors have found the following problems with respect to the meandering correction device.
In the technique disclosed in Patent Document 1, the meandering generated in the width direction of the web is corrected by operating the ball screw included in the meandering correction device. Since the surface of the screw provided on the ball screw is coated with grease, the sliding member provided on the ball screw can slide around the screw smoothly. When correcting the meandering generated in the width direction of the web, the meandering correction device adjusts the position of the web by operating the ball screw by about several mm. When the ball screw is repeatedly operated for about several mm, grease is likely to be cut off at the sliding portion of the ball screw. Therefore, when using the meandering correction device, it is necessary to supply grease as appropriate.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a grease supply method of a meandering correction device capable of suppressing grease shortage.

One aspect for achieving the above object is a method of supplying grease of a meandering correction device.
The process of driving the take-up roll to loosen the web placed in the web take-up device,
A step of supplying grease to the sliding member included in the meandering correction device of the take-up roll in a loosened state of the web is provided.
In the step of supplying the grease, the sliding member is reciprocated in the axial direction with an amount of movement such that the grease adheres to the sliding member.

The grease supply method of the meandering correction device according to the present invention includes a step of driving a take-up roll to loosen the web arranged in the web take-up device and a meandering correction device of the take-up roll with the web loosened. It is provided with a step of supplying grease to the sliding member provided with the above. In the step of supplying grease, since the sliding member is reciprocated in the axial direction with a movement amount to the extent that the grease adheres to the sliding member, the grease can be adhered to the sliding member. Therefore, it is possible to suppress the running out of grease.

According to the present invention, it is possible to provide a grease supply method for a meandering correction device capable of suppressing grease shortage.

It is a perspective view of the web winding apparatus which concerns on this embodiment. It is a perspective view of the web winding apparatus which concerns on this embodiment. It is a perspective view of a take-up roll. It is sectional drawing of the take-up roll. It is a flowchart which shows the grease supply method which concerns on this embodiment. It is a schematic cross-sectional view of the meandering correction apparatus and its periphery which concerns on this embodiment.

Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments. Further, in order to clarify the explanation, the following description and drawings are appropriately simplified.

First, with reference to FIGS. 1 and 2, a configuration of a web winding device (web winding device according to the present embodiment) including a meandering correction device for implementing the grease supply method according to the present embodiment will be described. conduct. As shown in FIG. 1, the web winding device 1 includes a winding roll 10, a side plate 3, and a free roll 4. Note that FIG. 1 illustrates the web 2 in addition to the web winding device 1.

The web winding device 1 includes a plurality of winding rolls, a plurality of free rolls, and a pair of side plates. The plurality of take-up rolls and the plurality of free rolls are arranged so that their respective axial directions are parallel to each other. The pair of side plates are arranged to face each other so as to support both ends of the plurality of take-up rolls and the plurality of free rolls. The plurality of take-up rolls and the plurality of free rolls can rotate while being supported by a pair of side plates. In the examples shown in FIGS. 1 and 2, only one of the pair of side plates is shown as the side plate 3. Hereinafter, one of the plurality of take-up rolls will be referred to as a take-up roll 10, and one of the plurality of free rolls will be referred to as a free roll 4.

The web 2 is a sheet-like member processed at the time of electrode production. The web 2 is, for example, a base sheet on which a catalyst layer, MPL, and the like are formed. The web 2 may be a catalyst layer formed on the base material sheet and an electrolyte membrane on which MPL or the like is transferred. The web 2 is wound on the take-up roll 10. The web winding device 1 unwinds a part of the web 2 from the winding roll 10 and winds the web 2 from the winding roll 10 to another winding roll 10 via a free roll 4 or the like. Transport to roll. While transporting the web 2 from the take-up roll 10 to another take-up roll, the entire web 2 is processed by processing the portion drawn out between the take-up roll 10 and the other take-up rolls. be able to. By adjusting the feeding amount of the web 2 in the take-up roll 10, the tension received by the feeding portion of the web 2 can be adjusted.

Next, the configuration of the take-up roll 10 will be described with reference to FIGS. 3 and 4. FIG. 3 is a perspective view of the take-up roll. FIG. 4 is a cross-sectional view of the take-up roll. As shown in FIG. 3, the take-up roll 10 includes a bobbin 11, an air shaft 12, a direct motor 13, a meandering correction device 16, and a motor 19. The direct motor 13 includes a motor 14 and a shaft 15. As shown in FIG. 4, the meandering correction device 16 includes a guide 17 and a ball screw 18.

The bobbin 11 is a tubular member having a through hole formed in the center thereof. The web 2 shown in FIG. 1 is wrapped around the bobbin 11. The air shaft 12 is fitted in the through hole provided in the bobbin 11. The air shaft 12 is fixed to the shaft 15. The air shaft 12 and the shaft 15 rotate when the motor 14 is driven. The bobbin 11 is fixed by the air shaft 12. Therefore, when the motor 14 is driven, the bobbin 11 rotates together with the air shaft 12. The take-up roll 10 can unwind the web 2 by rotating the bobbin 11.

The meandering correction device 16 corrects the meandering of the web 2 wound around the bobbin 11 by moving the direct motor 13 in the axial direction. The take-up roll 10 includes a sensor and a control unit (not shown). A sensor (not shown) detects the position of the end of the shaft 15. A control unit (not shown) drives the motor 19 based on the position of the end of the shaft 15 detected by the sensor. When the motor 19 is driven, the ball screw 18 included in the meandering correction device 16 rotates, and the guide 17 is moved in the axial direction.

The direct motor 13 is fixed to the guide 17. Therefore, the direct motor 13 moves in the axial direction with the movement of the guide 17 driven by the motor 19. The web 2 wound around the bobbin 11 moves in the axial direction as the direct motor 13 moves in the axial direction. A control unit (not shown) can correct the axial position of the direct motor 13 by adjusting the drive of the motor 19.

Next, the grease supply method according to the present embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 is a flowchart showing a grease supply method according to the present embodiment. FIG. 6 is a schematic cross-sectional view of the meandering correction device and its periphery according to the present embodiment.

As shown in FIG. 6, the ball screw 18 includes a screw 18a, a sliding member 18b, and a nut 18c. As shown in FIG. 6, a spiral groove is formed on the side surface of the screw 18a. A spiral groove is formed in a portion of the nut 18c in contact with the screw 18a so as to face the groove formed in the screw 18a. The sliding member 18b is arranged in the gap between the groove formed on the side surface of the screw 18a and the groove formed on the nut 18c. As shown in FIG. 6, the sliding member 18b is a plurality of balls.

The ball screw 18 includes a mechanism that allows the sliding member 18b to slide infinitely in the gap between the groove formed on the side surface of the screw 18a and the groove formed in the nut 18c. In the example shown in FIG. 6, the path 18d is formed in the nut 18c. The path 18d communicates with both ends of the groove formed in the nut 18c. The path 18d is a through hole having a thickness that allows the sliding member 18b to pass through.

When the screw 18a rotates, the sliding member 18b slides in the gap between the groove formed on the side surface of the screw 18a and the groove formed in the nut 18c and enters the path 18d. The sliding member 18b that has entered the path 18d slides in the path 18d and enters the gap between the groove formed on the side surface of the screw 18a and the groove formed in the nut 18c, thus sliding. The member 18b can infinitely circulate the gap between the groove formed on the side surface of the screw 18a and the groove formed on the nut 18c and the path 18d.

The screw 18a is rotated by the drive of the motor 19. The nut 18c moves in the axial direction by the rotation of the screw 18a. The nut 18c is fixed to the guide 17 shown in FIG. Therefore, when the screw 18a rotates, the guide 17 moves in the axial direction along with the nut 18c. The sliding member 18b reduces friction between the screw 18a and the nut 18c by sliding in the gap between the groove formed on the side surface of the screw 18a and the recess formed in the nut 18c when the screw 18a rotates. do.

Grease is applied to the groove formed on the side surface of the screw 18a, the recess formed in the nut 18c, and the sliding member 18b. When the grease is sufficiently applied, the friction generated when the sliding member 18b slides is further reduced. When correcting the meandering of the web 2, it is necessary to repeat the operation of moving the bobbin 11 in the axial direction in a narrow range. Therefore, when correcting the meandering of the web 2, it is necessary to repeatedly move the screw 18a in a narrow range in the axial direction.

If the screw 18a is repeatedly moved in the axial direction within a range in which each of the plurality of balls constituting the sliding member 18b does not make one rotation, the grease adhering to the sliding member 18b does not sufficiently circulate. Therefore, grease breakage occurs in the sliding member 18b and its surroundings. When grease breakage occurs, the sliding member 18b and the screw 18a and the nut 18c come into direct contact with each other, so that the generated friction increases. Therefore, when the grease runs out, the ball screw 18 is likely to malfunction and the ball screw 18 is likely to be damaged. Therefore, the grease is supplied to the ball screw 18 by performing the grease supply method according to the present embodiment.

As shown in FIG. 5, in the grease supply method according to the present embodiment, first, a step of loosening the web 2 (step S1) is performed. In the step of loosening the web 2 (step S1), the amount of the web 2 unwound from the take-up roll 10 is increased so that the unwound portion is not under tension. Hereinafter, the state in which the web 2 is not under tension is referred to as a state in which the web 2 is loosened.

Subsequently, in a state where the web 2 is loosened, a step of supplying grease (step S2) is performed. In the step of supplying grease (step S2), grease is supplied to the sliding member 18b and its periphery by reciprocating the sliding member 18b in the axial direction. Specifically, grease is attached to the sliding member 18b by reciprocating the screw 18a in the axial direction with a movement amount of each of the sliding member 18b making one rotation or more.

In the example shown in FIG. 6, first, the amm ball screw 18 is moved in the positive direction of the x-axis, then the (a + b) mm ball screw 18 is moved in the negative direction of the x-axis, and then the bmm ball is further moved in the positive direction of the x-axis. Move the screw 18. The movement amount (a + b) mm is a movement amount in which each of the plurality of balls constituting the sliding member 18b makes at least one rotation. When each of the plurality of balls constituting the sliding member 18b makes one rotation or more, the adjacent balls rub against each other and grease circulates.

When performing step S2, the ball screw 18 is moved in the axial direction with the web 2 loosened. When the web 2 is in a loose state, even if the ball screw 18 is moved in the axial direction, it is difficult for a force to be applied to the web 2. Therefore, in step S2, damage to the web 2 due to the axial movement of the ball screw 18 is suppressed. In this way, the grease supply method according to the present embodiment suppresses grease shortage.

The grease supply method according to the present embodiment can be carried out without removing the web 2 from the take-up roll 10. Therefore, the worker can implement the grease supply method according to the present embodiment at any timing. For example, when a "break-in operation" button is installed on an operation panel (not shown) for operating the web winding device 1 and the operator selects the "break-in operation" button, the above steps S1 and S2 To execute.

When processing the web 2, it is preferable that the drawn portion is in a state of receiving an appropriate tension. Therefore, when processing the web 2, the tension received by the web 2 is adjusted as appropriate. When adjusting the tension, the web 2 may be in a loosened state. Therefore, when the operation of loosening the web 2 is performed, the grease may be supplied by performing the above step S2.

According to the invention according to the present embodiment described above, it is possible to provide a grease supply method of a meandering correction device capable of suppressing grease shortage.

The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit.

1 Web take-up device 2 Web 3 Side plate 4 Free roll 10 Take-up roll 11 Bobbin 12 Air shaft 13 Direct motor 14 Motor 15 Shaft 16 Serpentine correction device 17 Guide 18 Ball screw 18a Screw 18b Sliding member 18c Nut 18d Path 19 Motor

Claims (1)

The process of driving the take-up roll to loosen the web placed in the web take-up device,
A step of supplying grease to the sliding member included in the meandering correction device of the take-up roll in a loosened state of the web is provided.
In the step of supplying the grease, the sliding member is reciprocated in the axial direction with an amount of movement such that the grease adheres to the sliding member.
Grease supply method for meandering correction device.

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