TWI629227B - Crimping roller and manufacturing method thereof - Google Patents

Abstract

The crimping roller 1 of the present invention is a crimping roller which presses a specific opposed roller through a separator. The crimping roller 1 includes a bottom bracket 2 having a cylindrical outer surface 2a, and a cylindrical outer tube 3 arranged on the outside of the bottom bracket 2 so as to have the same centerline L as the bottom bracket 2 and between The central portion 2c of the middle shaft 2 in a direction parallel to the center line L is engaged with the middle shaft 2. The bottom shaft 2 is made of a material having a longitudinal elastic modulus of 190 GPa or more and 470 GPa or less, and the outer tube 3 is made of a material having a longitudinal elastic modulus of 100 GPa or more and 470 GPa or less. The distance between the outer surface 2a of the bottom bracket 2 and the inner surface 3b of the outer tube 3 becomes the outer diameter of the outer tube 3 × 0.10 mm or less.

Description

Crimping roller and manufacturing method thereof

The present invention relates to a crimping roller that is pressed against a specific opposed roller through a separator, and a method for manufacturing such a crimping roller.

When manufacturing thin articles (hereinafter referred to as "sheets") that are relatively thin, such as plastic films, plastic sheets, and fabrics, in various steps, a sheet that will be used as the original sheet, intermediate product, or product is performed. Continuous sending operation or pulling operation. In this operation, the sheet is fed / pulled by rotating the roller while holding the sheet with the two opposing rollers, thereby adjusting the speed of the sheet and / or adjusting the tension applied to the sheet . Typically, a set of opposing rollers is composed of a guide roller and a nip roller whose shafts are fixed. The nip roller is a crimping roller which has a movable shaft and is crimped to the guide roller via a sheet by a load applied to the movable shaft.

Regarding the use of such a roller, the "slicing step" is described below as an example. The cutting step is as follows: roll the sheet from the intermediate product (original sheet roll) formed by rolling a wide sheet into a roll shape, and cut (cut the strip) to a specific width, and cut the cut Each sheet is rolled up again into a roll shape, thereby obtaining a plurality of articles of each width. In the slitting step, a device called a slitter is used. The device includes an unwinding section for unwinding a sheet from an original sheet roll, a cutting section for cutting the rolled sheet into a specific width, and winding the cut sheet into a specific width as a product roll. Take-up department. In such a device, in order to prevent the variation in the tension of the sheet in the unwinding portion from being transmitted to the slitting portion, a nip roller that holds the sheet together with the guide roller may be disposed between the unwinding portion and the slitting portion. . In this case, the nip roller guide is required The roller acts evenly. The reason is that if the sheet is not evenly nipped by the guide rollers and the nip rollers, the sheet in the cut portion may meander in the width direction, or the sheet in the cut portion may be damaged.

Therefore, the following has been proposed as a pressure-bonding roller that acts uniformly on a counter roller such as a guide roller. That is, the center shaft and the outer tube are arranged in a double layer with a predetermined interval therebetween, and the center shaft and the outer tube are fixed to each other at the center, so that the center shaft and the outer tube separate the flexure (for example, refer to Japanese Patent Real Equity 2- 29076, Japanese Patent Laid-Open No. 2-66042, Japanese Patent Laid-Open No. 8-26535, Japanese Patent Laid-Open No. 2004-277168, and Japanese Patent Laid-Open No. 2010-149983), the center shaft and the outer tube The central shaft and the outer tube are connected by a plurality of bearings at a specific interval, and the deflection is separated by the central shaft and the outer tube (for example, refer to Japanese Patent Publication No. 6-45410). As for these crimping rollers, the outer tube is flexed according to the deflection of the counter roller, thereby applying a uniform load to the counter roller.

In addition, for example, from the viewpoint of suppressing vibration during rotation, the rigidity of the opposed roller may be increased in order to increase the natural vibration number of the opposed roller. In this case, it is also required that the crimping roller act uniformly on the opposed roller with high rigidity.

Therefore, an object of the present invention is to provide a crimping roller capable of applying a uniform load to a high-stiffness opposing roller, and a method for manufacturing such a crimping roller.

The crimping roller of the present invention is a crimping roller that presses a specific opposed roller through a separator, and includes: a bottom bracket having a cylindrical outer surface; and a cylindrical outer tube having The center axis is arranged on the outside of the center axis in the same manner as the center axis, and the center of the center axis is joined to the center axis in a direction parallel to the center line. The bottom bracket includes a material having a longitudinal elastic modulus of 190 GPa or more and 470 GPa or less, and the outer tube includes a material having a longitudinal elastic modulus of 100 GPa or more and 470 GPa or less. The distance between the outer surface of the bottom bracket and the inner surface of the outer tube becomes the outer diameter of the outer tube × 0.10 mm or less.

In the crimping roller, the center shaft includes a material having a longitudinal elastic modulus of 190 GPa or more and 470 GPa or less, and the outer tube includes a material having a longitudinal elastic modulus of 100 GPa or more and 470 GPa or less. This makes it possible to appropriately increase the rigidity of the center shaft and the outer tube while reducing the deflection amount (average value of the amount of deflection at each position in a direction parallel to the center line) of the center shaft and the outer tube. Furthermore, the distance between the outer surface of the bottom bracket and the inner surface of the outer tube becomes the outer diameter of the outer tube × 0.10 mm or less. This makes it possible to reduce the deflection amount of the center shaft and the outer tube and the deflection difference of the outer tube (the difference between the maximum value and the minimum value of the deflection amount at each position in a direction parallel to the center line). As described above, according to this crimping roller, since the deflection amount of the center shaft and the outer tube is reduced and the deflection difference of the outer tube is reduced, it is possible to apply a uniform load to the opposed roller that is highly rigid.

The distance between the outer surface of the bottom bracket and the inner surface of the outer tube may be the outer diameter of the outer tube × 0.02 mm or more. With this configuration, it is possible to prevent the bottom shaft from coming into contact with the outer tube.

The bottom bracket may be a cylindrical member. According to this configuration, it is possible to appropriately reduce the amount of deflection of the center shaft while reducing the weight of the crimping roller.

In addition, at least one of the bottom bracket and the outer tube may include steel, and at least one of the bottom bracket and the outer tube may include a carbon fiber reinforced resin. According to these configurations, the amount of deflection of the center shaft and the outer tube can be appropriately reduced, and the difference in deflection of the outer tube can be appropriately reduced.

The crimping roller can also be used as a nip roller that holds a sheet together with a guide roller, that is, a counter roller. According to this configuration, the sheet can be uniformly nipped by the guide roller and the pinch roller. Thus, for example, when a guide roller and a nip roller are arranged between the unwinding part and the cutting part in the slitting machine, it is possible to prevent the sheet of the cutting part from meandering in the width direction or the slitting part. Some sheets are broken.

The crimping roller may further include a plating layer formed on an outer surface of the outer tube. According to this structure, damage to a sheet | seat etc. can be suppressed.

The manufacturing method of the crimping roller of the present invention is the manufacturing method of the crimping roller described above, which includes the following steps: preparing to be divided into two outer halves; and inserting both ends of the central shaft outside the two halves Each of them will be divided in half at the center of the bottom axis The tubes are butted to engage the bottom bracket.

According to the manufacturing method of the crimping roller, even when the distance between the outer surface of the center shaft and the inner surface of the outer tube is reduced within the range of the outer diameter of the outer tube × 0.10 mm or less, it can be easily and accurately manufactured Equipped with a crimping roller with a central shaft and an outer tube fixed to each other at the center.

1‧‧‧ Crimp Roller

2‧‧‧ bottom bracket

2a‧‧‧outer surface

2b‧‧‧Inner surface

2c‧‧‧ Central

2d‧‧‧ both ends

3‧‧‧ Outer tube

3a‧‧‧outer surface

3b‧‧‧Inner surface

3c‧‧‧component

4‧‧‧bearing

5‧‧‧ Coating

10‧‧‧ slitting machine

11‧‧‧ roll out

12‧‧‧Sliced Section

13‧‧‧ Take-up Department

14‧‧‧ transport roller

15‧‧‧ Opposing roller

16‧‧‧contact roller

C‧‧‧ roller core

L‧‧‧ Centerline

R1‧‧‧Original film roll

R2‧‧‧product roller

S‧‧‧ Sheet

FIG. 1 is a structural diagram of a slitter to which a crimping roller according to an embodiment of the present invention is applied.

Fig. 2 is a sectional view of a crimping roller according to an embodiment of the present invention.

FIG. 3 is a graph showing the relationship between the distance from the center position and the deflection amount of the outer tube under the conditions of Table 1. FIG.

FIG. 4 is a graph showing the relationship between the distance from the center position and the deflection amount of the outer tube under the conditions of Table 2. FIG.

FIG. 5 is a graph showing the relationship between the distance from the center position and the deflection amount of the outer tube under the conditions of Table 3. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the same or corresponding parts are marked with the same symbols in each figure, and repeated descriptions are omitted.

FIG. 1 is a structural diagram of a slitter to which a crimping roller according to an embodiment of the present invention is applied. As shown in FIG. 1, the slitting machine 10 includes a roll-out section 11, a slitting section 12, and a winding section 13. The unwinding unit 11 unwinds the sheet S from the original sheet roll R1. The slitting section 12 cuts the sheet S rolled out by the unwinding section 11 to a specific width. The winding unit 13 winds up the sheet S cut into a specific width by the slitting unit 12 as a product roll R2. In the slitter 10, the sheet S is transported along a specific transport path by a plurality of transport rollers 14. The sheet S is, for example, a plastic film, a laminated film, a metal foil, a fabric, or the like.

On the conveyance path of the sheet S between the unwinding portion 11 and the slit portion 12, a counter roller 15 as a guide roller and a crimping roller 1 are arranged. The crimping roller 1 is for holding the sheet S together with the facing roller 15 Nip roller. The opposing roller 15 and the crimping roller 1 prevent the tension variation of the sheet S in the unwinding portion 11 from being transmitted to the slit portion 12. The counter roller 15 includes, for example, a material having a longitudinal elastic modulus of 60 GPa or more and 400 GPa or less, such as metal such as aluminum alloy and steel, and carbon fiber reinforced resin using highly elastic carbon fiber.

A contact roller 16 is provided in the winding section 13. The contact roller 16 contacts the roller core C of the product roller R2 through the rolled sheet S under a specific pressure. The contact roller 16 prevents air from being caught in the product roller R2. The roller core C includes, for example, metals such as aluminum alloys and steels, carbon fiber reinforced resins using highly elastic carbon fibers, plastics, paper, and the like.

Next, a configuration of the pressure-contact roller 1 that presses the intervening sheet S against the opposed roller 15 will be described. Fig. 2 is a sectional view of a crimping roller according to an embodiment of the present invention. As shown in FIG. 2, the crimping roller 1 includes a cylindrical intermediate shaft 2 and a cylindrical outer tube 3 arranged on the outer side of the central shaft 2 so as to have the same centerline L as the central shaft 2. The bottom bracket 2 is a cylindrical member having a cylindrical outer surface 2a and an inner surface 2b. The bottom bracket 2 includes, for example, a metal having a longitudinal elastic modulus of 190 GPa or more and 470 GPa or less, such as a metal such as steel or a carbon fiber reinforced resin using highly elastic carbon fibers. The outer tube 3 is a cylindrical member having a cylindrical outer surface 3a and an inner surface 3b. The outer tube 3 contains, for example, a metal having a longitudinal elastic modulus of 100 GPa or more and 470 GPa or less, such as a metal such as steel or a carbon fiber reinforced resin using highly elastic carbon fibers.

The central portion 2c of the center axis 2 in a direction parallel to the center line L is expanded in diameter and is fitted into the inner surface 3b of the outer tube 3. In this state, the outer tube 3 is fixed to the central portion 2c of the bottom bracket 2 by waiting. More specifically, the outer tube 3 includes cylindrical members 3c and 3c divided into two halves. At the central portion 2c of the center shaft 2, the members 3c, 3c divided into two halves are engaged with the center shaft 2 in a state of abutting with each other.

The distance between the outer surface 2a of the bottom bracket 2 (the surface other than the central portion 2c) and the inner surface 3b of the outer tube 3 is the outer diameter of the outer tube 3 × 0.10 mm or less. On the other hand, the distance between the outer surface 2a of the bottom bracket 2 and the inner surface 3b of the outer tube 3 becomes the outer diameter of the outer tube 3 × 0.02 mm or more. Such as By providing a gap between the outer surface 2a of the bottom bracket 2 and the inner surface 3b of the outer tube 3, the deflection can be separated by the bottom bracket 2 and the outer tube 3.

In addition, the length of the central portion 2c (hereinafter referred to as "length", etc.) that is the joint between the center shaft 2 and the outer tube 3 may be the length of the outer tube 3 5 ~ 50% of the length. Since the smaller the length of the joint portion, the easier it is for the central shaft 2 and the outer tube 3 to separate and flex, the uniformity of the gripping of the sheet S by the facing roller 15 and the crimping roller 1 is improved. However, if the length of the joint is less than 5%, the life may be shortened due to insufficient strength, or the number of natural vibrations may be reduced. On the contrary, if the length of the joint portion exceeds 50%, it is difficult to separate and bend the center shaft 2 and the outer tube 3, so the uniformity of the gripping of the sheet S by the facing roller 15 and the crimping roller 1 changes. Worse.

Furthermore, a bearing 4 is fixed to each of the two end portions 2d and 2d of the bottom bracket 2 to support the crimping roller 1 so as to be rotatable around the center line L. In addition, on the outer surface 3a of the outer tube 3, a plating layer 5 made of a metal such as copper, nickel, chromium, iron, or aluminum is formed. Thereby, damage to the sheet S can be suppressed. Although not shown, the outer surface 3a of the outer tube 3 may be covered with rubber or a rubber-like elastic body.

As described above, in the crimping roller 1, the center shaft 2 includes a material having a longitudinal elastic modulus of 190 GPa or more and 470 GPa or less, and the outer tube 3 includes a material having a longitudinal elastic modulus of 100 GPa or more and 470 GPa or less. Preferably, the bottom bracket 2 includes a material having a longitudinal elastic modulus of 190 GPa or more and 350 GPa or less, and the outer tube 3 includes a material having a longitudinal elastic modulus of 120 GPa or more and 350 GPa or less. This makes it possible to appropriately increase the rigidity of the center shaft 2 and the outer tube 3 while reducing the amount of deflection of the center shaft 2 and the outer tube 3 (the average value of the amount of deflection at each position in a direction parallel to the center line L). Furthermore, the distance between the outer surface 2a of the bottom bracket 2 and the inner surface 3b of the outer tube 3 becomes the outer diameter of the outer tube 3 × 0.10 mm or less. This makes it possible to reduce the amount of deflection of the center shaft 2 and the outer tube 3 and the deflection difference of the outer tube 3 (the difference between the maximum value and the minimum value of the deflection amount at each position in a direction parallel to the center line L). Here, the deflection difference of the outer tube 3 may be increased by increasing the outer diameter of at least one of the center shaft 2 and the outer tube 3 or by increasing The thickness decreases. As described above, according to the crimping roller 1, the amount of deflection of the center shaft 2 and the outer tube 3 is reduced and the deflection difference of the outer tube 3 is reduced. Thereby, it is possible to apply a uniform load to the counter roller 15 having high rigidity so as to include a material having a longitudinal elastic modulus of 100 GPa or more and 470 GPa or less. Furthermore, as long as the distance between the outer surface 2a of the bottom bracket 2 and the inner surface 3b of the outer tube 3 is set to the outer diameter of the outer tube 3 × 0.08 mm or less, the deflection amount of the bottom bracket 2 and the outer tube 3 can be further reduced, And the deflection of the outer tube 3 is poor.

In the crimping roller 1, the distance between the outer surface 2a of the center shaft 2 and the inner surface 3b of the outer tube 3 is the outer diameter of the outer tube 3 × 0.02 mm or more. This can prevent the bottom bracket 2 and the outer tube 3 from being brought into contact with each other due to the deflection of the bottom bracket 2 and the outer tube 3. In addition, manufacturing of the pressure-bonding roller 1 becomes easy.

The crimping roller 1 is used as a nip roller that holds the sheet S together with a counter roller 15 serving as a guide roller. In this case, in the slitter 10, the sheet S can be evenly sandwiched by the facing roller 15 and the crimping roller 1. Accordingly, it is possible to prevent the sheet S of the cut-out portion 12 from meandering in the width direction or damage to the sheet of the cut-off portion 12.

Here, the crimping roller 1 used as a nip roller requires the following first to fourth points.

The first point is that the crimping roller 1 is in close contact with the sheet S on the facing roller 15 over the entire width direction of the sheet S and generates a uniform clamping force on the sheet S (the facing roller 15 and the crimping) The force of the roller 1 holding the sheet S). The reason is that if a uniform clamping force is not generated at any position of the crimping roller 1 in a direction parallel to the center line L, there is unevenness in the amount of air entrained between the sheet S in the product roller R2. This may lead to various winding disadvantages.

The second point is that the deflection of the crimping roller 1 is small. The reason is that when the crimping roller 1 is pressed against the opposed roller 15 by the separator sheet S, if the crimping roller 1 is bent, a load smaller than a desired load acts on the opposing roller 15 and cannot be performed. The performance of the crimping roller 1 is likely to be obtained.

The third point is that the crimping roller 1 is excellent in high-speed performance. That is, the third point is that the natural vibration number (permissible speed) of the pressure-bonding roller 1 is high. The reason is that if the natural vibration number of the crimping roller 1 is low, there is a possibility that the crimping roller 1 vibrates during its own rotation.

The fourth point is that the manufacturing cost of the crimping roller 1 is low. The reason is that, usually, it should be prepared There are more types or number of nip rollers than other rollers.

According to the above-mentioned crimping roller 1, since the deflection amount of the center shaft 2 and the outer tube 3 is reduced and the deflection difference of the outer tube 3 is reduced, the first point and the second point are satisfied.

In addition, since the center shaft 2 and the outer tube 3 are highly rigid, the number of natural vibrations is increased, and as a result, the third point is also satisfied. In particular, when the center shaft 2 and the outer tube 3 include a carbon fiber-reinforced resin, since the center shaft 2 and the outer tube 3 are lightweight, the natural vibration number can be further increased. However, if at least one of the center shaft 2 and the outer tube 3 contains a carbon fiber reinforced resin, the amount of deflection of the center shaft 2 and the outer tube 3 can be appropriately reduced, and the deflection difference of the outer tube 3 can be appropriately reduced.

Furthermore, since the structure of the crimping roller 1 is simplified, the fourth point is also satisfied. In particular, when the center shaft 2 and the outer tube 3 include steel, the cost of the material of the center shaft 2 and the outer tube 3 is reduced, so that the cost of the crimping roller 1 itself can be reduced. However, if at least one of the center shaft 2 and the outer tube 3 includes steel, the amount of deflection of the center shaft 2 and the outer tube 3 can be appropriately reduced, and the deflection difference of the outer tube 3 can be appropriately reduced.

Next, a method for manufacturing the pressure-bonding roller 1 will be described. First, the outer tube 3 (ie, the members 3c, 3c) which is divided into two halves is prepared. Next, each of the two end portions 2d and 2d of the center shaft 2 is inserted into each of the outer tubes 3 divided into two halves, and the center portion 2c of the center shaft 2 is divided into two halves of the outer tube 3. Then, in this state, the outer tube 3 is fixed to the central portion 2c of the center shaft 2 by using a wait or the like, and the central portion 2c of the center shaft 2 is divided into two halves. The outer tube 3 is joined to the center shaft 2.

According to the manufacturing method of the crimping roller 1, it is possible to reduce the distance between the outer surface 2a of the center shaft 2 and the inner surface 3b of the outer tube 3 within the range of the outer diameter of the outer tube 3 or less than 0.10 mm. The crimping roller 1 including the middle shaft 2 and the outer tube 3 which are fixed to each other in the central portion 2c is easily and accurately manufactured. More specifically, since the center shaft 2 and the outer tube 3 can be easily centered, the crimping roller 1 with a smaller eccentricity can be manufactured. In addition, since the deflection of the core bone (center shaft 2) is small, the crimping roller 1 with high accuracy can be manufactured.

Moreover, in the crimping roller 1, the distance between the outer surface 2a of the center shaft 2 and the inner surface 3b of the outer tube 3 becomes the outer diameter of the outer tube × 0.02 mm or more, so that both ends 2d, 2d of the center shaft 2 Each is easily inserted into each of the outer tubes 3 which are divided into two halves.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment. For example, the bottom bracket 2 is not limited to a cylindrical member, but may be a solid cylindrical member. However, if the bottom bracket 2 is a cylindrical member, the amount of deflection of the bottom bracket 2 can be appropriately reduced while reducing the weight of the crimping roller 1. The crimping roller 1 is not limited to being used as a nip roller that holds the sheet S together with the counter roller 15 as a guide roller. The pressure-bonding roller 1 can also be used in other applications such as the contact roller 16 of the slitter 10 described above.

In the above, the example of the cutting step has been mainly described, but the crimping roller of the present invention can also be preferably used in various other steps of processing the sheet. In other words, the pressure-bonding roller of the present invention is capable of processing the sheet stably by the uniform pressure-bonding applied to the roller opposed to the pressure-bonding roller.

As another example, an extending step of extending the sheet with respect to the traveling direction may be mentioned. The stretching step is a step for manufacturing a stretched sheet. In the extending step, it is sequentially arranged from the upstream to the downstream: the unwinding part that rolls out the original sheet from the original roll, the first nip roller / guide roll that holds the rolled sheet, and the heated sheet Mechanism (hot plate, oven, etc.), a second nip roller / guide roller that holds the sheet, and a winding section that winds the extended sheet. Based on the ratio of the peripheral speed of the second nip roller / guide roller to the peripheral speed of the first nip roller / guide roller, the sheet is extended in the moving direction in the mechanism for heating the sheet. By using the pressure-bonding roller of the present invention for the first and / or second nip roller, it is possible to carry out uniform pressure-bonding in the width direction of the sheet. Thereby, it is possible to suppress meandering or partial slippage of the sheet, and to achieve uniform extension of the sheet with respect to the width direction and the moving direction.

Furthermore, as still another example, a printing step of printing a sheet, a step of laminating (dry lamination) a plurality of kinds of sheets by an adhesive, and the like can be cited. By using the crimping roller of the present invention as a nip roller in these steps, the meandering of the sheet can be suppressed, thereby obtaining Stable moving speed and uniform and stable tension. Accordingly, in the printing step, fine and stable printing can be performed. In the bonding step, a uniform and stable adhesive force can be obtained.

[Example]

Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following examples.

The crimping rollers of Examples 1 to 4 and Comparative Examples 1 and 2 were prepared under the conditions shown in Table 1, and a uniformly distributed load of 200 kgf (= 1.96 kN) was applied to the entire length of each crimping roller. Thereby, an evaluation test (simulation) when each of the pressure-bonding rollers was used as a nip roller was performed. In Examples 1 to 4 and Comparative Examples 1 and 2, the length of the crimping roller (outer tube) was 3200 mm, and the material of the outer tube and the center shaft was CFRP (carbon fiber reinforced resin) having a longitudinal elastic modulus of 294.2 GPa. Furthermore, in Table 1, the so-called gap refers to the distance between the outer surface of the central shaft and the inner surface of the outer tube, and the so-called joint length refers to the length of the joint between the central shaft and the outer tube at the central portion of the central shaft (as shown in Table 2 and The same is true in Table 3).

As shown in Table 1 and Figure 3, the smaller the gap, the lower the deflection amount and deflection difference. In the crimping rollers of Examples 1 to 4 and Comparative Example 1, the deflection amount was less than 1.6 mm. The curvature is less than 0.07mm. However, if the gap is 1 mm or less, the manufacture of the pressure-bonding roller becomes difficult, so the pressure-bonding roller of Comparative Example 1 is not realistic. From this result, the gap is preferably the outer diameter of the outer tube × 0.10 mm or less (Examples 1 to 4), and more preferably the outer diameter of the outer tube × 0.08 mm or less (Examples 1 to 3). On the other hand, it can be said that the gap is preferably the outer diameter of the outer tube × 0.02 mm or more (Examples 1 to 4).

Next, the crimping rollers of Examples 5 to 10 were prepared under the conditions shown in Table 2, and a distribution load of 200 kgf (= 1.96 kN) was applied to the entire length of each crimping roller. Thereby, an evaluation test (simulation) when each of the pressure-bonding rollers was used as a nip roller was performed. In Examples 5 to 10, the length of the crimping roller (outer tube) was 3200 mm. In Examples 5 and 6, the materials of the outer tube and the center shaft were CFRP having longitudinal elastic modulus different from each other. In addition, in Examples 7 to 10, the thickness of the bottom bracket was changed.

As shown in Table 2 and Figure 4, by increasing the longitudinal elastic modulus of the material of the center shaft and the outer tube, the deflection difference is reduced. Here, focusing on the graph of Example 6 in FIG. 4, the deflection difference between the two sides of the joint portion becomes larger than the deflection difference between the joint portion between the center shaft and the outer tube. In order to reduce the deflection difference at the joint between the bottom bracket and the outer tube, it is necessary to reduce the deflection amount of the bottom bracket. Therefore, as in Examples 7 to 10, by increasing the inner diameter and outer diameter of the center shaft, the deflection difference is reduced to 0.031 mm.

Next, the crimping rollers of Examples 11 to 18 were prepared under the conditions shown in Table 3, and a distribution load of 200 kgf (= 1.96 kN) was applied to the entire length of each crimping roller. Thereby, an evaluation test (simulation) when each of the pressure-bonding rollers was used as a nip roller was performed. In Examples 11 to 18, the length of the crimping roller (outer tube) was 2500 mm. In Examples 11 and 12, the materials of the outer tube and the central shaft were CFRP having longitudinal elastic modulus different from each other. In addition, in Examples 13 to 15, the thickness of the center shaft was changed, and in Examples 16 to 18, the thickness of the outer tube was changed.

As shown in Table 3 and Figure 5, by increasing the longitudinal elastic modulus of the material of the center shaft and the outer tube, the difference in deflection is reduced. In addition, it can be seen that although this case increases the thickness of the outer tube, it is effective in reducing the amount of deflection and the difference in deflection.

According to the present invention, it is possible to provide a crimping roller capable of acting uniformly on a highly rigid opposed roller, and a method for manufacturing such a crimping roller.

Claims (8)

A crimping roller, which presses a specific opposed roller through a separator, includes: a central shaft having a cylindrical outer surface; and a cylindrical outer tube having the same shape as the above central shaft. The centerline method is arranged outside the above-mentioned center axis, and the center portion of the above-mentioned center axis is connected to the above-mentioned center axis in a direction parallel to the above-mentioned center line; and the above-mentioned center axis includes a material having a longitudinal elastic modulus of 190 GPa or more and 470 GPa or less. The outer tube includes a material having a longitudinal elastic modulus of 100 GPa or more and 470 GPa or less. The interval between the outer surface of the middle shaft and the inner surface of the outer tube becomes the outer diameter of the outer tube × 0.10 mm or less. The outer tube contains a carbon fiber reinforced resin, and the above-mentioned central shaft system is integrally formed as a single shaft. A joint portion that is expanded with a diameter and is joined to the outer tube is formed at a central portion in a direction parallel to the centerline of the above-mentioned central shaft. The joint portion is integrally formed with the bottom bracket. The outer tube is divided into two halves. At the center portion of the bottom bracket, the outer tube is divided into two halves. The state, and then to the joint portion by engagement with said bottom. For example, the crimping roller of claim 1, wherein a distance between the outer surface of the middle shaft and the inner surface of the outer tube is an outer diameter of the outer tube × 0.02 mm or more. The crimping roller according to claim 1, wherein the above-mentioned central shaft is a cylindrical member. The crimping roller according to claim 2, wherein the middle shaft is a cylindrical member. The crimping roller according to any one of claims 1 to 4 is used as a nip roller that holds the sheet together with a guide roller, that is, the above-mentioned facing roller. The crimping roller according to any one of claims 1 to 4, further comprising a plating layer formed on the outer surface of the outer tube. The crimping roller according to claim 5, further comprising a plating layer formed on the outer surface of the outer tube. A method of manufacturing a crimping roller, which is a method of manufacturing a crimping roller according to any one of claims 1 to 7, including the steps of preparing the above-mentioned outer tube that is divided into two halves; and The ends are respectively inserted into each of the outer tubes that are divided into two halves, and the outer tube that is divided into two halves is butted against the central portion of the central shaft to join the central shaft.