JP6992297B2 - Method of manufacturing elastic rolls - Google Patents

Description

The present invention relates to a method for manufacturing an elastic roll.

The rubber roll manufacturing apparatus of Patent Document 1 sequentially feeds the core metal to the central portion of the unvulcanized rubber material extruded into a cylindrical shape at intervals, and the rubber roll portion whose outer peripheral surface of the core metal is covered with the rubber material. , It is equipped with an ejector that alternately discharges the hollow portion of the rubber material whose core metal is hollow.

Japanese Unexamined Patent Publication No. 2013-103473

There is an elastic roll having a core metal and a cylindrical rubber material covering the outer peripheral surface of the core metal. In such an elastic roll, since members such as bearings are attached to both ends of the elastic roll, both ends of the outer peripheral surface of the core metal are not covered with the rubber material and are exposed to the outside.

When manufacturing this elastic roll, first, the rubber material is coated on the entire core metal including the end face of the core metal. Then, the rubber material of the portion covered with the end face of the core metal is removed, and the end face of the core metal is exposed to the outside. Further, a cylindrical member is inserted between the core metal and the rubber material from the outside in the axial direction of the core metal, and the rubber material and the core metal are partially separated from each other.

Here, when removing the rubber material of the portion covering the end face of the core metal, the portion covered with a pair of blades (upper blade and lower blade) from the direction orthogonal to the axial direction of the core metal. The rubber material is sandwiched and the rubber material is cut. However, in such a configuration, when the position of the blade and the position of the end face of the core metal in the axial direction are different, the rubber material (elastic material) may remain on the end surface of the core metal. Then, the cylindrical member cannot be inserted.

An object of the present invention is that when the end face of the core metal is exposed, the elastic material is sandwiched between a pair of blades to cut the elastic material at the portion covering the end face, as compared with the case where the end face of the core metal is exposed. It is to prevent the elastic material from remaining.

In the method for manufacturing an elastic roll according to the first aspect of the present invention, a gap is formed by separating the end face and the elastic material from a covering member in which the core metal is covered with the elastic material including the end face thereof. The first step, the second step of cutting the elastic material in the portion covering the void from the radial direction of the core metal, and the cylindrical member being inserted between the core metal and the elastic material from the end face side. It is characterized by comprising a third step of separating the core metal and the elastic material and cutting the elastic material at the separated portions.

The method for manufacturing an elastic roll according to a second aspect of the present invention is the method for manufacturing an elastic roll according to the first aspect . By pushing with a blade to deform the elastic material, the end face and the elastic material are separated from each other to form a gap, and in the second step, the elastic material in a portion covering the gap with the blade is formed in the radial direction. It is characterized by cutting from.

The method for manufacturing an elastic roll according to a third aspect of the present invention is the method for manufacturing an elastic roll according to the second aspect , wherein in the first step, the portion of the portion pressed by the blade from one of the radial directions is described. The elastic material is supported from the other side in the radial direction.

The method for manufacturing an elastic roll according to a fourth aspect of the present invention is the method for manufacturing an elastic roll according to the first aspect , wherein in the first step, the elastic material of a portion covering an axial end portion of the core metal. Is pushed toward the core metal from one of the radial directions to deform the elastic material, whereby the end face and the elastic material are separated from each other to form a gap.

In the method for manufacturing an elastic roll according to a fifth aspect of the present invention, in the method for manufacturing an elastic roll according to the fourth aspect , in the first step, the elastic material at a portion pressed from one of the radial directions is used. , It is characterized in that it is supported from the other side in the radial direction.

The method for manufacturing an elastic roll according to a sixth aspect of the present invention is the method for manufacturing an elastic roll according to the fifth aspect , wherein in the second step, a member for pushing the elastic material and a member for supporting the elastic material are used. Is characterized in that a blade of another member is inserted into the elastic material from the radial direction and passed through the void to cut the elastic material.

The cutting device according to a seventh aspect of the present invention includes a separating member for forming a gap between the end face of the covering member in which the core metal includes the end face thereof and being covered with the elastic material, and the elastic material. It is characterized by comprising a blade for cutting the elastic material in a portion covering the end face by passing through a gap.

According to the method for manufacturing an elastic roll according to the first aspect of the present invention, when the end face of the core metal is exposed, the elastic material is sandwiched between a pair of blades to cut the elastic material at the portion covering the end face. Compared with the case, it is possible to suppress the elastic material from remaining on the end face of the core metal.

According to the method for manufacturing an elastic roll according to the second aspect of the present invention, the number of members to be controlled can be reduced as compared with the case where the member pushing the elastic material and the member cutting the elastic material are separate members. ..

According to the method for manufacturing an elastic roll according to a third aspect of the present invention, the elastic roll is formed by simply pushing the elastic material from one of the radial directions with a blade, as compared with the case where the elastic material is deformed to form a gap. The volume of the void can be increased.

According to the method for manufacturing an elastic roll according to a fourth aspect of the present invention, there is a comparison with a case where the end face of the core metal and the elastic material are separated by sucking the end portion of the elastic material and pulling it in the axial direction of the core metal. Therefore, the void can be formed without using a suction pump.

According to the method for manufacturing an elastic roll according to a fifth aspect of the present invention, a gap is formed as compared with a case where the elastic material is deformed to form a gap only by pushing the elastic material from one of the radial directions. The volume of can be increased.

According to the method for manufacturing an elastic roll according to a sixth aspect of the present invention, the shape of the cut end of the elastic material is as compared with the case where the elastic material is cut by using a member that pushes the elastic material or a member that supports the elastic material. It is possible to suppress the variation.

According to the cutting apparatus according to the seventh aspect of the present invention, the end face of the core metal is elastic as compared with the case where the elastic material of the portion covering the end face is cut in a state where the end face and the elastic material are in contact with each other. It is possible to prevent the material from remaining.

It is a perspective view which showed the cutting apparatus used in the manufacturing method of the elastic roll which concerns on 1st Embodiment of this invention. It is a front view which showed the cutting apparatus used in the manufacturing method of the elastic roll which concerns on 1st Embodiment of this invention. It is a front view which showed the cutting apparatus used in the manufacturing method of the elastic roll which concerns on 1st Embodiment of this invention. (A) (B) It is a process diagram which showed the 1st step and 2nd steps of the elastic roll manufacturing method which concerns on 1st Embodiment of this invention. (A) (B) It is a process diagram which showed the 1st step and 2nd steps of the elastic roll manufacturing method which concerns on 1st Embodiment of this invention. It is a perspective view which showed the rubber roll manufactured by the manufacturing method of the elastic roll which concerns on 1st Embodiment of this invention. It is a flow figure which showed the process of the manufacturing method of the elastic roll which concerns on 1st Embodiment of this invention. It is a block diagram which showed the control system by the control part of the cutting apparatus used in the manufacturing method of the elastic roll which concerns on 1st Embodiment of this invention. It is a block diagram which showed the covering apparatus used in the manufacturing method of the elastic roll which concerns on 1st Embodiment of this invention. It is a process drawing which showed the process (the process of coating rubber) of the elastic roll manufacturing method which concerns on 1st Embodiment of this invention. It is a process drawing which showed the process (the process of coating rubber) of the elastic roll manufacturing method which concerns on 1st Embodiment of this invention. It is a process drawing which showed the process (the process of coating rubber) of the elastic roll manufacturing method which concerns on 1st Embodiment of this invention. It is a process drawing which showed the process (the process of coating rubber) of the elastic roll manufacturing method which concerns on 1st Embodiment of this invention. It is a process drawing which showed the process of the manufacturing method of the elastic roll which concerns on 1st Embodiment of this invention. (A) (B) (C) It is a process diagram which showed the process (the process of removing rubber) of the elastic roll manufacturing method which concerns on 1st Embodiment of this invention. (A) (B) (C) It is a process diagram which showed the process (the process of removing rubber) of the elastic roll manufacturing method which concerns on 1st Embodiment of this invention. (A) (B) (C) (D) It is a process diagram which showed the process (the process of removing rubber) of the method of manufacturing an elastic roll which concerns on 1st Embodiment of this invention. It is a perspective view which showed the cutting apparatus used in the manufacturing method of the elastic roll which concerns on the comparative embodiment with respect to 1st Embodiment of this invention. (A) (B) It is a process diagram which showed the process of the manufacturing method of the elastic roll which concerns on the comparative embodiment with respect to 1st Embodiment of this invention. (A) (B) It is a process diagram which showed the process of the manufacturing method of the elastic roll which concerns on the comparative embodiment with respect to 1st Embodiment of this invention. It is a perspective view which showed the cutting apparatus used in the manufacturing method of the elastic roll which concerns on 2nd Embodiment of this invention. (A) (B) It is a process drawing which showed the process of the manufacturing method of the elastic roll which concerns on 2nd Embodiment of this invention. (A) (B) It is a process drawing which showed the process of the manufacturing method of the elastic roll which concerns on 2nd Embodiment of this invention. It is a flow figure which showed the process of the manufacturing method of the elastic roll which concerns on 2nd Embodiment of this invention. It is a block diagram which showed the control system by the control part of the cutting apparatus used in the manufacturing method of the elastic roll which concerns on 2nd Embodiment of this invention. (A) (B) It is a process drawing which showed the modification to the process of the manufacturing method of the elastic roll which concerns on embodiment of this invention. (A) (B) (C) It is a process drawing which showed the modification to the process of the manufacturing method of the elastic roll which concerns on embodiment of this invention.

<First Embodiment>
An example of the method for manufacturing an elastic roll and a cutting device according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 20. Note that the arrow H shown in the figure indicates the vertical direction of the device, the arrow W indicates the width direction of the device and indicates the horizontal direction, and the arrow D indicates the depth direction of the device and indicates the horizontal direction. Further, when the cross section of the rubber is shown in each drawing, the rubber before vulcanization is shown by Dodd, and the rubber after vulcanization is shown by diagonal lines.

As shown in FIG. 6, the rubber roll 210 manufactured by the method for manufacturing an elastic roll of the present embodiment has a cylindrical rubber member 202 coated on the outer peripheral surface of a cylindrical core metal 200. For example, it is used as a charging roll that comes into contact with an image holder (photoreceptor drum) of an image forming apparatus and is driven to rotate to charge the outer peripheral surface of the image holder. Since both ends of the rubber roll 210 used as the charging roll are supported by bearings or the like, both ends of the core metal 200 are not covered with the rubber member 202. The rubber roll 210 is an example of an elastic roll.

First, a covering device 10 for coating the rubber member 202 on the core metal 200, and a cutting device 50 for cutting the rubber member 202 at the portion covering the end face 200A of the core metal 200, which are used in the method for manufacturing an elastic roll, are used. The exposure device 80 that exposes both ends of the core metal 200 will be described. The rubber member 202 is an example of an elastic material. The "elastic material" is a member such as rubber that expands and contracts by applying stress, and has a Young's modulus of 10 [MPa] or more and 100 [MPa] or less.

(Coating device 10)
As shown in FIG. 9, the covering device 10 is arranged below the extrusion mechanism 12 composed of a so-called crosshead die, the separation mechanism 14 arranged below the extrusion mechanism 12, and the separation mechanism 14. It is equipped with a carry-out mechanism 16.

Further, the covering device 10 includes a rubber material supply mechanism 18 arranged on one side (right side in FIG. 9) of the extrusion mechanism 12 in the device width direction, and a core metal supply mechanism 20 arranged above the extrusion mechanism 12. And have.

[Rubber material supply mechanism 18]
The rubber material supply mechanism 18 includes a cylindrical main body portion 24 extending in the width direction of the device, a screw 26 arranged inside the main body portion 24, and an input port 28 for charging the rubber material.

In this configuration, the rubber material supply mechanism 18 sends out the rubber material charged from the charging port 28 toward the extrusion mechanism 12 while being kneaded by the rotating screw 26 inside the main body portion 24.

[Extrusion mechanism 12]
The extrusion mechanism 12 has a cylindrical shape extending in the vertical direction of the device connected to the rubber material supply mechanism 18, and the cylindrical core metal 200 extending in the vertical direction is supplied from above from the supply hole 32 and the rubber material supply mechanism 18. The rubber material is covered with the core metal 200 and is provided with a discharge hole 34 for discharging downward.

In this configuration, the extrusion mechanism 12 covers the core metal 200 supplied from the supply hole 32 with a rubber material and discharges the core metal 200 from the discharge hole 34. In this embodiment, the thickness of the rubber material coated on the core metal 200 is 2 [mm].

[Core metal supply mechanism 20]
The core metal supply mechanism 20 includes a plurality of rollers 38 arranged above the extrusion mechanism 12.

In this configuration, the core metal supply mechanism 20 sequentially feeds the core metal 200 into the supply holes 32 of the extrusion mechanism 12. In the present embodiment, as an example, the outer diameter of the core metal 200 is 8 [mm], and the total length is 350 [mm]. Further, both ends of the core metal 200 are C-chamfered. Further, the outer peripheral surface of the core metal 200 is preliminarily coated with a primer for enhancing the adhesiveness with the rubber material except for the end portion in the axial direction.

[Separation mechanism 14]
The separation mechanism 14 is arranged below the extrusion mechanism 12 and includes a pair of separation members 42. The pair of separating members 42 are covered with a rubber material and are arranged so as to sandwich the core metal 200 discharged from the discharge hole 34.

In the above configuration, the separation mechanism 14 moves the pair of separation members 42 in the width direction of the apparatus to discharge the core metal 200 discharged from the discharge hole 34 of the extrusion mechanism 12 and to cover the core metal 200 with the rubber material. Separate each time.

In the present embodiment, the rubber material coated on the core metal 200 is referred to as a rubber member 202, and the member in which the rubber member 202 is coated on the entire core metal 200 is referred to as a rubber roll portion 204. The rubber roll portion 204 is an example of a covering member.

[Bring-out mechanism 16]
The carry-out mechanism 16 is arranged below the separation mechanism 14 and includes a pair of gripping members 48. The pair of gripping members 48 are arranged so as to sandwich the rubber roll portion 204, which is covered with the rubber member 202 and separated by the separation mechanism 14.

In the above configuration, the carry-out mechanism 16 moves the pair of gripping members 48 in the width direction of the device and the vertical direction of the device to cover the rubber member 202 and separate the rubber roll portion 204 by the separation mechanism 14. Take out from below the separation mechanism 14.

(Cutting device 50)
As shown in FIGS. 1 and 4A and 4B, the cutting device 50 includes a support base 52 that supports the end portion of the rubber roll portion 204 from below. Further, the cutting device 50 includes a plate-shaped blade 54 that cuts the rubber member 202 of the portion of the rubber roll portion 204 supported by the support base 52 that covers the end face 200A of the core metal 200.

In the above configuration, the cutting device 50 moves the blade 54 to cut the rubber member 202 at the portion covering the end face 200A of the core metal 200, as shown in FIGS. 5A and 5B. .. As a result, the end face 200A of the core metal 200 of the rubber roll portion 204 is exposed to the outside. In the following description, a member in which the end face 200A of the core metal 200 of the rubber roll portion 204 is exposed to the outside is referred to as a rubber roll body 206.

The details of the cutting device 50 will be described later.

(Exposure device 80)
As shown in FIG. 15A, the exposure device 80 refers to a pair of gripping members 82 that grip the rubber roll body 206 extending in the width direction of the device, a drive unit 84 that rotates the gripping member 82, and the gripping member 82. It is equipped with a sleeve 86 that moves relative to each other. Further, the exposure device 80 includes an air cylinder 88 for moving the sleeve 86, a pair of cutters 90 for cutting the rubber member 202, and a solenoid 92 for moving the cutter 90, respectively.

The pair of gripping members 82 have an outer diameter dimension similar to that of the core metal 200, and as shown in FIGS. 15A and 15B, they are moved by a solenoid (not shown) to form a rubber roll body 206. Both ends of the core metal 200 are sandwiched from the width direction of the device.

The drive unit 84 rotates the rubber roll body 206 gripped by the pair of gripping members 82 in the circumferential direction of the rubber roll body 206.

The pair of sleeves 86 each have a cylindrical cylindrical portion 86A inserted between the core metal 200 and the rubber member 202. The cylindrical portion 86A is an example of the cylindrical portion.

As shown in FIGS. 15B and 15C, the pair of air cylinders 88 move the sleeve 86 so that the cylindrical portion 86A has the core metal 200 and the rubber member 202 at both ends of the rubber roll body 206. It is designed to be inserted in between. In this state, the core metal 200 and the rubber member 202 are separated from each other at the tip of the cylindrical portion 86A.

A pair of cutters 90 are provided, and as shown in FIG. 15A, both ends of the rubber roll body 206 extending in the width direction of the device are arranged so as to face each other in the radial direction of the rubber roll body 206.

With the rubber roll body 206 rotating, the solenoid 92 inserts the cutter 90 facing the rubber roll body 206 into the portion where the core metal 200 and the rubber member 202 are separated from each other, whereby the end of the rubber member 202 is inserted. The portion is cut off (see FIGS. 17 (A), (B), (C), and (D)).

(Manufacturing method of elastic roll)
Next, a method for manufacturing the elastic roll will be described.

First, the rubber member 202 is coated on the core metal 200 by using the covering device 10.

Specifically, the rubber material charged into the input port 28 of the rubber material supply mechanism 18 shown in FIG. 9 is heated by a heater (not shown) inside the main body portion 24, and is kneaded by a rotating screw 26 to be an extrusion mechanism. It is sent out toward 12.

On the other hand, the core metal 200 is supplied to the supply hole 32 of the extrusion mechanism 12 by the core metal supply mechanism 20. Therefore, the extrusion mechanism 12 discharges the core metal 200 coated with the rubber material from the discharge hole 34 while covering the core metal 200 supplied from the supply hole 32 with the rubber material.

Here, as shown in FIG. 10, when the tip of the rear core metal 200 approaches the discharge hole 34 and the rear core metal 200 stops, the pair of gripping members 48 are moved in a direction approaching each other, and a pair. The gripping member 48 grips the front core metal 200 covered with the rubber member 202.

Then, as shown in FIG. 11, the gripping member 48 in the state of gripping the core metal 200 coated with the rubber member 202 moves downward. Then, a rubber material portion in which the core metal 200 does not exist is formed between the front core metal 200 and the rear core metal 200.

Further, the feeding of the core metal 200 is restarted, and as shown in FIG. 12, the portion of the rubber material in which the core metal 200 does not exist moves to the facing position of the pair of separating members 42. Then, as shown in FIGS. 13 and 14, the pair of separating members 42 move in a direction approaching each other and come into contact with each other, and then separate from each other to cut the rubber material and cover the rubber member 202. The core metal 200 is separated. Then, the rubber roll portion 204 in which the rubber member 202 is covered with the core metal 200 is formed. Since the rubber material is cut, the tension of the rubber material pulled in the vertical direction is eliminated, so that the rubber member 202 at both ends in the longitudinal direction of the rubber roll portion 204 is compared with the other parts. It swells in the radial direction of the core metal 200.

Next, the rubber member 202 of the portion covering the end face 200A of the core metal 200 of the rubber roll portion 204 is cut using the cutting device 50.

As shown in FIGS. 4 and 5, the blade 54 of the cutting device 50 is inserted into the rubber member 202 of the portion of the rubber roll portion 204 supported by the support base 52 that covers the end face 200A of the core metal 200. Will be done.

Specifically, first, the core metal 200 forms a gap 208 by separating the end face 200A and the rubber member 202 of the portion covering the end face 200A (see FIGS. 4A and 4B, first step). ).

Next, using the blade 54, the rubber member 202 at the portion covering the gap 208 is cut from the radial direction of the core metal 200 (see FIGS. 5A and 5B, second step). As a result, the end face 200A of the core metal 200 of the rubber roll portion 204 is exposed to the outside, and the rubber roll body 206 is formed.

The details of the step of cutting the rubber member 202 of the portion covering the end face 200A of the core metal 200 of the rubber roll portion 204 by using the cutting device 50 will be described in detail later.

Next, the exposure device 80 is used to cut the rubber member 202 of the portion of the rubber roll body 206 that covers the outer peripheral surfaces of both ends of the core metal 200.

Specifically, as shown in FIGS. 15A and 15B, the pair of gripping members 82 of the exposure device 80 are moved by a solenoid (not shown) to press both ends of the core metal 200 of the rubber roll body 206. , Insert from the width direction of the device. Further, the drive unit 84 rotates the rubber roll body 206 gripped by the pair of gripping members 82 in the circumferential direction of the rubber roll body 206.

Further, as shown in FIGS. 15B and 15C, the pair of air cylinders 88 move the sleeve 86 so that the cylindrical portion 86A has the core metal 200 and the rubber member 202 at both ends of the rubber roll body 206. It is inserted between and. As a result, the core metal 200 and the rubber member 202 are separated from each other at the tip of the cylindrical portion 86A.

Further, as shown in FIGS. 16A, 16B, and 16C, the solenoid 92 uses the cutter 90 facing the rubber roll body 206 with the core metal 200 and the rubber member while the rubber roll body 206 is rotating. It is inserted in the portion where 202 is separated. As a result, as shown in FIGS. 17 (A), (B), (C), and (D), the portion of the rubber member 202 covering the outer peripheral surfaces of both ends of the core metal 200 is cut (third step). ).

Then, by removing the cut rubber member, the outer peripheral surfaces of both ends of the core metal 200 are exposed, and the rubber roll 210 is manufactured.

(Main part composition)
Next, the cutting device 50 will be described.

As shown in FIG. 2, the cutting device 50 detects the positions of the pedestal 56 on which the rubber roll portion 204 is placed, the pair of support bases 52, the pair of blades 54, and the core metal 200 of the rubber roll portion 204. And have. Further, the cutting device 50 includes a moving mechanism 62 for moving the support base 52 and the blade 54 in the width direction of the device, a moving mechanism 64 for moving the blade 54 in the vertical direction of the device, and a control unit 68 for controlling each part. (See Fig. 8).

[Pedestal 56]
The pedestal 56 is placed on the floor F and extends in the width direction of the device. Further, the length of the pedestal 56 in the device width direction is shorter than the length of the rubber roll portion 204. Further, the pedestal 56 has a positioning portion (not shown) that determines the position of the rubber roll portion 204 mounted so as to extend in the width direction of the device.

In this configuration, with the rubber roll portion 204 mounted on the pedestal 56, both ends of the rubber roll portion 204 in the longitudinal direction protrude from the pedestal 56 in the device width direction.

[Support stand 52]
The pair of support pedestals 52 have the same configuration as each other, and are arranged so as to sandwich the pedestal 56 from the device width direction when viewed from the device depth direction. The support base 52 is supported by a rail (not shown) extending in the width direction of the device, and is movable in the width direction of the device. Specifically, the pair of support bases 52 have a separation position (see FIG. 2) separated from the rubber roll portion 204 mounted on the pedestal 56 in the device width direction, and the end portion of the rubber roll portion 204 from below. It is movable to the support position (see FIG. 3) to support.

As shown in FIG. 1, the support base 52 has a V-shaped V-shaped surface 52A having an open upper portion when viewed from the device width direction. The V-shaped surface 52A comes into contact with the rubber roll portion 204, and the support base 52 supports the rubber roll portion 204.

Further, the support base 52 has a flat surface 52B facing the outside in the width direction of the device (the side opposite to the central portion side in the longitudinal direction of the rubber roll portion 204). With the support base 52 arranged at the support position, the plane 52B is arranged outside the end surface 200A of the core metal 200 in the device width direction, as shown in FIG. In the present embodiment, the plane 52B of the support base 52 arranged at the support position is arranged outside the device width direction by 0.2 [mm] with respect to the end face 200A (dimension L1 in FIG. 3).

[Blade 54]
The pair of blades 54 have the same configuration as each other, and as shown in FIG. 2, they are arranged above the support base 52 when viewed from the depth direction of the device. The pair of blades 54 are supported by a rail extending in the width direction of the device and a rail extending in the vertical direction of the device, which are not shown, and are movable in the width direction of the device and the vertical direction of the device. Specifically, the pair of blades 54 are separated from the rubber roll portion 204 mounted on the pedestal 56 in the device width direction (see FIG. 2) and the rubber roll above the end portion of the rubber roll portion 204. It is possible to move to an approaching position (see FIG. 3) approaching the portion 204. Further, the pair of blades 54 arranged at the close position can be moved downward to the cutting position (see FIG. 5B) for cutting the rubber member 202 of the portion covering the end surface 200A of the core metal 200. It has become.

As shown in FIG. 1, the blade 54 has a plate-like blade having a plate surface in the device width direction, and has a V-shaped blade 54A having an open bottom when viewed from the device width direction. The position in the device width direction of the plane 54B facing the inside in the device width direction (the side facing the other blade 54) of the blade 54 is arranged at the support position with the blade 54 arranged at the approach position and the cutting position. It is the same as the position of the flat surface 52B of the support base 52 in the device width direction (see FIG. 3). The blade 54A is an example of a separating member.

[Movement mechanism 62]
The moving mechanism 62 (see FIG. 8) is adapted to move the support base 52 and the blade 54 in the device width direction by using a known mechanical element such as a ball screw or a belt.

In this configuration, as shown in FIGS. 2 and 3, the moving mechanism 62 moves the support base 52 and the blade 54 arranged at the separated positions to the support position and the approach position. Further, the moving mechanism 62 moves the support base 52 and the blade 54 arranged at the support position and the approach position to the separated positions.

[Movement mechanism 64]
The moving mechanism 64 (see FIG. 8) is adapted to move the blade 54 in the vertical direction of the device by using a known mechanical element such as a ball screw or a belt.

In this configuration, the moving mechanism 64 moves the blade 54 arranged at the approaching position to the cutting position as shown in FIGS. 3 and 5B. Further, the moving mechanism 64 moves the blade 54 arranged at the cutting position to the approaching position.

[Sensor 60]
The sensor 60 is a so-called laser sensor, and as shown in FIG. 2, is arranged on one side (left side in the figure) of the rubber roll portion 204 mounted on the pedestal 56 in the device width direction. The light emitting portion and the light receiving portion (not shown) of the sensor 60 face one end surface 200A of the core metal 200 in the device width direction.

In this configuration, the sensor 60 detects the position of the core metal 200 of the rubber roll portion 204 mounted on the pedestal 56 in the device width direction.

[Control unit 68]
As shown in FIG. 8, the control unit 68 operates the moving mechanisms 62 and 64 based on the detection result by the sensor 60. The control of each part by the control unit 68 will be described together with the operation of the main part configuration described later.

(Action of main part composition)
Next, the first step and the second step described in the method for manufacturing an elastic roll will be described while comparing with the method for manufacturing an elastic roll according to a comparative embodiment. In the state before the first step is executed, the support base 52 and the blade 54 are arranged at separated positions. Further, with respect to FIGS. 4 (A) (B), 5 (A) (B), 19 (A) (B), and 20 (A) (B), one side of the rubber roll portion 204 in the device width direction. The part of is shown.

First, the cutting device 550 used in the method for manufacturing an elastic roll according to a comparative embodiment will be described with reference to FIG. Regarding the cutting device 550, a portion different from the cutting device 50 will be mainly described.

[Cutting device 550]
The cutting device 550 includes a pedestal 56, a sensor 60, a pair of blades 54, and a pair of plate-shaped lower blades 552 (see FIG. 18). Further, the cutting device 550 includes a moving mechanism 62 for moving the lower blade 552 and the blade 54 in the width direction of the device, a moving mechanism 64 for moving the blade 54 in the vertical direction of the device, and a control unit 68 for controlling each part. There is.

The lower blade 552 is supported in the same manner as the support base 52, and has a shape symmetrical with respect to the blade 54 in the vertical direction. Specifically, as shown in FIG. 18, the lower blade 552 has a plate-like blade having a plate surface in the device width direction, and has a V-shaped blade 552A having an upper opening when viewed from the device width direction. ing. Further, in the lower blade 552, the position in the device width direction of the plane 552B facing the outside in the device width direction is the same as the position in the device width direction of the plane 54B of the blade 54. That is, the flat surface 552B of the lower blade 552 arranged at the support position is arranged outside the device width direction by 0.2 [mm] with respect to the end surface 200A of the core metal 200 (dimension L2 in FIG. 19).

[First step, second step]
Next, the first step and the second step will be described with reference to the flow chart shown in FIG. 7. Regarding the method for manufacturing the elastic roll according to the comparative embodiment, a part different from the method for manufacturing the elastic roll according to the present embodiment will be mainly described.

The first step and the second step are executed by a series of operations. First, the operator puts the rubber roll portion 204 on the pedestal 56 as shown in FIG.

Then, in step S100, the sensor 60 detects the position of the rubber roll portion 204 in the core metal 200 in the device width direction. Then, the control unit 68 receives the detection result of the sensor 60. When the control unit 68 receives the detection result of the sensor 60, the process proceeds to step S200.

In step S200, based on the detection result of the sensor 60, the control unit 68 operates the moving mechanism 62 to support the support base 52 and the blade 54 arranged at the separated positions as shown in FIG. , Move to an approaching position. The length of the core metal 200 is input to the control unit 68 in advance, and the control unit 68 obtains position information in the device width direction of both end faces 200A of the core metal 200 from the detection result of the sensor 60. .. When the support base 52 reaches the support position and the blade 54 reaches the approach position, the process proceeds to step S300.

In step S300, the control unit 68 operates the moving mechanism 64 to move the blade 54 arranged at the approaching position to the cutting position.

Here, in the manufacture of the elastic roll according to the comparative embodiment, the control unit 68 operates the moving mechanism 64 and lowers the blade 54 arranged at the approaching position as shown in FIGS. 19A and 19B. Move to. Then, the blade 54A of the blade 54 invades the rubber member 202 of the portion covering the end surface 200A of the core metal 200, and pushes the rubber member 202 of this portion from above. When the rubber member 202 of the pressed portion is deformed downward, the blade 552A of the lower blade 552 invades a part of the rubber member 202.

Further, the blade 54 moves downward toward the cutting position as shown in FIGS. 20A and 20B. Then, the blade 54 reaches the cutting position. As a result, the blade 54A and the blade 552A cut the rubber member 202 at the portion covering the end face 200A of the core metal 200. In this way, in the cutting device 550, the rubber member 202 is cut by sandwiching the rubber member 202 with a pair of blades (blade 54A and blade 552A).

Here, as described above, the plane 552B of the lower blade 552 arranged at the support position is arranged outside the end surface 200A in the 0.2 [mm] device width direction. Therefore, as shown in FIG. 20B, the thin-skinned rubber member 202 may remain on the end face 200A of the core metal 200.

On the other hand, in the method of manufacturing the elastic roll of the present embodiment, the control unit 68 operates the moving mechanism 64 and lowers the blade 54 arranged at the approaching position as shown in FIGS. 4A and 4B. Move to. Then, the blade 54A of the blade 54 intrudes into the rubber member 202 of the portion covering the end surface 200A of the core metal 200, and pushes the rubber member 202 of this portion from above (one of the radial directions of the core metal 200). Further, the support base 52 supports the rubber member 202 of the pushed portion from below (the other side in the radial direction of the core metal 200). That is, one of the radial directions of the core metal 200 and the other of the radial directions of the core metal 200 indicate directions facing each other.

As described above, when the rubber member 202 of the portion covering the end surface 200A of the core metal 200 is pushed from above, the rubber member 202 of this portion is deformed so as to extend in the width direction of the device. As described above, the primer (adhesive) is not applied to the end face 200A of the core metal 200.

Therefore, the rubber member 202 of the portion covering the end surface 200A of the core metal 200 is deformed outward in the width direction of the apparatus, so that the end surface 200A of the core metal 200 and the rubber member 202 are separated from each other to form a gap 208 (the gap 208 is formed). First step).

Further, the blade 54 moves downward toward the cutting position as shown in FIGS. 5A and 5B. Then, the blade 54A of the blade 54 passes through the gap 208, and the blade 54 reaches the cutting position. As a result, the rubber member 202 of the portion covering the end surface 200A of the core metal 200 is cut, and the end surface 200A of the core metal 200 is exposed to the outside (second step). In this way, the rubber roll body 206 is manufactured from the rubber roll portion 204.

When the rubber member 202 of the portion covering the end surface 200A of the core metal 200 is cut, the control unit 68 controls the moving mechanisms 62 and 64 to execute a process opposite to the above-mentioned process, whereby the support base 52, And the blade 54 moves to the separated position, and a series of first step and second step is completed.

After the rubber roll body 206 in which the end surface 200A of the core metal 200 is exposed to the outside is manufactured, the portion covering both ends of the outer peripheral surface of the core metal 200 by executing the above-mentioned third step. Rubber member 202 is cut. By removing the cut rubber member 202, the rubber roll 210 (see FIG. 6) is manufactured.

(summary)
As described above, in the method for manufacturing an elastic roll of the present embodiment, in the first step, the end face 200A of the core metal 200 and the rubber member 202 are separated from each other to form a gap 208. Then, in the second step, the blade 54A of the blade 54 passes through the gap 208, so that the rubber member 202 is cut. As a result, it is possible to prevent the rubber member 202 from remaining on the end face 200A of the core metal 200, as compared with the method for manufacturing an elastic roll according to the comparative embodiment.

Further, before inserting the cylindrical portion 86A between the core metal 200 and the rubber member 202 in the third step, the cylindrical portion 86A remains on the end face 200A of the core metal 200 as compared with the method for manufacturing the elastic roll according to the comparative embodiment. The man-hours for removing the rubber member 202 are reduced.

Further, in the method for manufacturing an elastic roll, as described above, the rubber member 202 is cut by the blade 54A passing through the gap 208. For example, the rubber member 202 is cut without using a liquid, as compared with the case where the rubber member 202 is cut by a water jet or the like.

Further, in the method of manufacturing an elastic roll, the rubber member 202 of the portion covering the end face 200A is pushed from above by the blade 54A to deform the rubber member 202, thereby separating the end face 200A and the rubber member 202. Further, the blade 54A cuts the rubber member 202 at the portion covering the gap 208. Therefore, for example, the number of members to be controlled is reduced as compared with the case where the member pushing the rubber member 202 and the member cutting the rubber member 202 are separate members.

Further, in the method of manufacturing the elastic roll, the support base 52 supports the rubber member 202 of the portion pushed by the blade 54A from above from below. Therefore, the volume of the gap 208 formed becomes larger than that in the case where the rubber member 202 is deformed to form the gap 208 simply by pushing the rubber member 202 with the blade 54A from above. Then, as the volume of the gap 208 increases, the blade 54A passes through the gap even if the position of the blade 54A in the device width direction varies. The size of the volume is confirmed, for example, by stopping each part in the middle of the process and cutting the rubber member 202.

Further, in the method of manufacturing an elastic roll, the V-shaped surface 52A of the support base 52 is in contact with the rubber roll portion 204, and the support base 52 supports the rubber roll portion 204. Therefore, as compared with the case where the support surface of the support base is the upper surface facing upward, the rubber roll portion 204 mounted on the pedestal 56 is suppressed from rolling in the depth direction of the device.

Further, in the cutting device 50, when the blade 54A pushes the rubber member 202, the end face 200A of the core metal 200 and the rubber member 202 are separated from each other to form a gap 208. Then, when the blade 54A of the blade 54 passes through the gap 208, the rubber member 202 is cut. As a result, it is possible to prevent the rubber member 202 from remaining on the end surface 200A of the core metal 200, as compared with the case where the cutting device 550 for cutting the rubber member 202 is used in the state where the end surface 200A and the rubber member 202 are in contact with each other. Will be done. Specifically, it is possible to prevent the rubber member 202 from remaining in a state of being covered with the end face 200A of the core metal 200.

<Second Embodiment>
Next, an example of the method for manufacturing the elastic roll and the cutting device according to the second embodiment of the present invention will be described with reference to FIGS. 21 to 25. In addition, about the 2nd Embodiment, the part different from the 1st Embodiment will be mainly described. 22 (A) (B) and 23 (A) (B) show one side of the rubber roll portion 204 in the device width direction.

(Cutting device 350)
The cutting device 350 of the second embodiment includes a pedestal 56, a pair of support bases 52, a pair of blades 54, a pair of pressing portions 352, and a sensor 60 for detecting the position of the rubber roll portion 204. Further, the cutting device 350 has a moving mechanism 362 that moves the support base 52, the blade 54, and the pressing portion 352 in the device width direction, a moving mechanism 64 that moves the blade 54 in the device vertical direction, and a pressing portion 352 in the device vertical direction. It is provided with a moving mechanism 366 for moving to and a control unit 368 for controlling each unit (see FIG. 25). That is, unlike the cutting device 50 of the first embodiment, the cutting device 350 of the second embodiment has a moving mechanism 362 that moves the pair of pressing portions 352, the support base 52, the blade 54, and the pressing portion 352 in the device width direction. And a moving mechanism 366 for moving the pressing portion 352 in the vertical direction of the device.

As shown in FIG. 21, the pressing portion 352 is arranged inside the cutting tool 54 in the width direction of the device. Further, the pressing portion 352 has a flat pressing surface 352A facing downward and a flat surface 352B facing outward in the device width direction. The pressing portion 352 is an example of a separating member.

The pressing portion 352 is supported by a rail extending in the width direction of the device (not shown) and a rail extending in the vertical direction of the device, and moves in the width direction of the device and the vertical direction of the device. The pressing portion 352 is separated from the rubber roll portion 204 mounted on the pedestal 56 in the device width direction, and is close to the rubber roll portion 204 above the end portion of the rubber roll portion 204 (FIG. FIG. 22 (A)) and so on. Further, the pressing portion 352 arranged at the approaching position moves downward to the pressing position (see FIG. 22B) for pushing the rubber member 202 of the portion covering the end portion of the outer peripheral surface of the core metal 200. It is designed to do.

The moving mechanism 362 (see FIG. 25) is adapted to move the support base 52, the blade 54, and the pressing portion 352 in the device width direction by using known mechanical elements such as a ball screw and a belt.

In this configuration, the moving mechanism 362 moves the support base 52, the blade 54, and the pressing portion 352 arranged at the separated positions to the support position and the approaching position. Further, the moving mechanism 362 moves the support base 52, the blade 54, and the pressing portion 352 arranged at the support position and the approach position to the separated positions.

The moving mechanism 366 (see FIG. 25) is adapted to move the blade 54 in the vertical direction of the device by using a known mechanical element such as a ball screw or a belt.

In this configuration, the moving mechanism 366 (see FIG. 25) moves the pressing portion 352 arranged at the approaching position to the pressing position as shown in FIGS. 22 (A) and 22 (B). Further, the moving mechanism 366 moves the pressing portion 352 arranged at the pressing position to the approaching position.

(Action of main part composition)
Next, the method for manufacturing the elastic roll according to the second embodiment will be described with reference to the flow chart shown in FIG. 24.

The first step and the second step of the method for manufacturing an elastic roll according to the second embodiment are executed by a series of operations. First, the operator puts the rubber roll portion 204 on the pedestal 56 (see FIG. 2). The rubber roll portion 204 is placed on the pedestal 56.

Then, in step S110, the sensor 60 detects the position of the core metal 200 of the rubber roll portion 204 in the device width direction. Then, the control unit 368 receives the detection result of the sensor 60. When the control unit 368 receives the detection result of the sensor 60, the process proceeds to step S210.

In step S210, the control unit 368 operates the moving mechanism 362 based on the detection result of the sensor 60, and as shown in FIG. 22A, the support base 52, the blade 54, and the blade 54 arranged at the separated positions are arranged. The pressing portion 352 is moved to the support position and the approach position. When the support base 52 reaches the support position, the blade 54 and the pressing portion 352 reach the approach position, the process proceeds to step S310.

In step S310, the control unit 368 operates the moving mechanism 366 to move the pressing unit 352 arranged at the approaching position to the pressing position as shown in FIGS. 22A and 22B.

As a result, the pressing portion 352 moves downward, and the pressing surface 352A of the pressing portion 352 comes into contact with the rubber member 202. Then, the pressing portion 352 pushes the rubber member 202 of the portion covering the end portion of the outer peripheral surface of the core metal 200 from above (one of the radial directions of the core metal 200). In other words, the pressing portion 352 pushes the rubber member 202 on the portion opposite to the portion supported by the support base 52 downward.

As described above, when the rubber member 202 of the portion covering the end portion of the outer peripheral surface of the core metal 200 is pushed from above, the rubber member 202 of this portion is deformed so as to extend in the width direction of the device. As described above, the primer (adhesive) is not applied to the end face 200A of the core metal 200.

Therefore, the rubber member 202 of the portion covering the end surface 200A of the core metal 200 is deformed to the outside in the width direction of the device, so that the end surface 200A of the core metal 200 and the rubber member 202 are separated from each other to form a gap 218 (). First step). When the pressing portion 352 reaches the pressing position, the process proceeds to step S410.

In step S410, the control unit 368 operates the moving mechanism 64 to move the blade 54 arranged at the approaching position to the cutting position as shown in FIGS. 22 (B) and 23 (A) (B). Let me. Then, the blade 54A of the blade 54 passes through the gap 218, and the blade 54 reaches the cutting position. As a result, the rubber member 202 of the portion covering the end surface 200A of the core metal 200 is cut, and the end surface 200A of the core metal 200 is exposed to the outside (second step). In this way, the rubber roll body 206 is manufactured from the rubber roll portion 204.

When the rubber member 202 of the portion covering the end surface 200A of the core metal 200 is cut, the control unit 368 controls the moving mechanisms 64, 362, 366, and the reverse process to the above-described process is executed. As a result, the support base 52, the blade 54, and the pressing portion 352 move to the separated positions, and a series of first steps and second steps are completed.

(summary)
As described above, in the method for manufacturing the elastic roll of the second embodiment, the pressing portion 352 pushes the rubber member 202 of the portion covering the end portion of the outer peripheral surface of the core metal 200 from above, whereby the rubber member 202 is pressed. It is deformed to form a void 218. Therefore, for example, as compared with the case where the end portion of the rubber member 202 in the longitudinal direction is sucked and the rubber member 202 is pulled in the axial direction of the core metal, the gap 218 is formed without using a suction pump.

Further, in the method of manufacturing the elastic roll, the support base 52 supports the rubber member 202 of the portion pressed from above by the pressing portion 352. As a result, the volume of the gap formed becomes larger than in the case where the rubber member 202 is deformed to form the gap 218 simply by pushing the rubber member 202 from above.

Further, the pressing surface 352A facing downward (in the radial direction of the core metal 200) is brought into contact with the rubber member 202, and the rubber member 202 is pushed downward. As a result, the rubber member 202 is greatly deformed as compared with the first embodiment, and the volume of the void becomes larger as compared with the first embodiment.

Further, due to the increase in the volume of the gap 218, the blade 54A passes through the gap 218 even when the position of the blade 54A in the device width direction is displaced outward.

Further, the pressing portion 352 that pushes the rubber member 202 and the blade 54A of a member different from the support base 52 that supports the rubber member 202 are inserted into the rubber member 202 from above and passed through the gap 218 to cut the rubber member 202. do. That is, after the gap 218 is formed, the blade 54A is inserted into the rubber member 202. Therefore, as compared with the first embodiment, the cut end of the rubber member 202 is suppressed from being scattered.

The action of the other second embodiment is the same as that of the first embodiment except that the action of cutting the rubber member 202 by using the blade 54A for pushing the rubber member 202.

Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments can be taken within the scope of the present invention. That is clear to those skilled in the art. For example, in the above embodiment, the rubber member 202 is cut by using the blade 54A, but the rubber member 202 may be cut by using, for example, a water jet or the like. However, in this case, the effect achieved by using the blade 54A is not exhibited.

Further, in the above embodiment, the rubber member 202 is deformed by pushing the rubber member 202 from above to form the gaps 208 and 218. However, as shown in FIGS. 26 and 27, the rubber member 202 A suction cup 400 that sucks the end portion may be used to form a gap. However, in this case, the effect of forming the gaps 208 and 218 by pushing the rubber member 202 from above is not exhibited.

Further, in the first embodiment, the support base 52 supports the end portion of the rubber roll portion 204, but it may not be particularly supported. Even in this case, unlike the cutting device 550 according to the comparative embodiment, since there is no lower blade 552, the blade 552A of the lower blade 552 does not penetrate into the rubber member 202. That is, there is no notch in the rubber member 202. As a result, the rubber member 202 is pushed by the blade 54A, so that the rubber member 202 is deformed and a gap is formed.

50 Cutting device 54A Blade (example of separation member)
86A Cylindrical part (example of cylindrical member)
200 Core metal 200A End face 202 Rubber member (example of elastic material)
204 Rubber roll part (covering member)
208 Void 210 Rubber roll (an example of elastic roll)
218 Void 350 Cutting device 352 Pressing part (example of separation member)

Claims (5)

To deform the elastic material by pushing the elastic material of the portion covering the end surface with a blade from one of the radial directions of the core metal with respect to the covering member in which the core metal includes the end face thereof and is covered with the elastic material. Then, in the first step of forming a gap by separating the end face and the elastic material,
The second step of cutting the elastic material of the portion covering the void from the radial direction of the core metal with the blade, and
A third step of inserting a cylindrical member between the core metal and the elastic material from the end face side, separating the core metal and the elastic material, and cutting the elastic material at the separated portion.
A method of manufacturing an elastic roll. The method for manufacturing an elastic roll according to claim 1, wherein in the first step, the elastic material of a portion pressed by the blade from one of the radial directions is supported from the other of the radial directions. With respect to the covering member in which the core metal is covered with the elastic material including its end face, the elastic material of the portion covering the axial end portion of the core metal is applied to the core metal from one of the radial directions of the core metal. The first step of forming a gap by separating the end face and the elastic material by pushing toward the shape of the elastic material and deforming the elastic material.
The second step of cutting the elastic material of the portion covering the void from the radial direction of the core metal, and
A third step of inserting a cylindrical member between the core metal and the elastic material from the end face side, separating the core metal and the elastic material, and cutting the elastic material at the separated portion.
A method of manufacturing an elastic roll. The method for manufacturing an elastic roll according to claim 3, wherein in the first step, the elastic material in a portion pressed from one of the radial directions is supported from the other in the radial direction. In the second step, a member that pushes the elastic material and a blade of a member other than the member that supports the elastic material are inserted into the elastic material from the radial direction and passed through the gap to pass the elastic material. The method for manufacturing an elastic roll according to claim 4, wherein the elastic roll is to be cut.

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