JP3208752B2 - Roll for tension application - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method in which a metal sheet is slit into several strips with a slitter and wound on the same winding machine. In addition, the present invention relates to a tension applying roll for applying a back tension to each of the strips during winding.

[0002]

2. Description of the Related Art In a slitter line in which a single metal plate is cut into a number of parallel strips and these strips are wound by the same winding machine, each of the cut strips is used. Since the thickness of the plates is not always constant, if these are wound by the same winding machine, a difference occurs in the winding diameter of each strip.

[0003] When a difference in the winding diameter occurs, the winding speed of each band plate, in other words, the winding tension becomes uneven, and the winding force of the winding coil formed after winding is reduced. Causes tightness or looseness, especially when the winding coil is loosely wound, slippage occurs between the wound strips, and the surface is scratched. It is assumed that

Therefore, generally, as shown in FIG. 4A, a metal plate 1 is cut by a slitter 2 to form several strips 3 (3).
a, 3b, 3c), and then these strips 3a, 3b,
Each of the strips 3a, 3b, 3 is passed through the back tension applying device 5 disposed in front of the winder 4 so that the strips 3a, 3b, 3
c, the winding tension of the winding machine 4 is made as uniform as possible.
In this case, the variation in the tightening force of each winding coil 6 is suppressed.

[0005] As shown in FIG. 4B, this type of back tension applying device 5 includes strips 3a, 3b, 3
c, a braking force is applied to a pair of upper and lower elastic rolls R to clamp the strips 3a, 3b, and 3c positioned between the elastic rolls R and the winder 4. At the same time, a large number of slits S over the entire length in the longitudinal direction are formed on the surface of the elastic roll R at intervals in the circumferential direction, so that the ribs between the slits S are wound around a strip in contact with the ribs. It is bent by tension, and is returned to the original state by an elastic restoring force at a distance from the contact point. The winding tension difference in each of the strips 3a, 3b, 3c due to the difference is automatically corrected.

[0006] However, when the processing capacity of the slitter line is increased, the rotation speed of the elastic roll R is also increased accordingly. Bounces and causes vibration, and a collision is generated between the ribs and the strips 3a, 3b, and 3c, which are considered to occur at this time, and noise is generated.
Further, if each of the strips 3a, 3b, 3c is a soft material, the strips 3a, 3b.
There was a defect that a stripe-like scar was generated on the surface of 3c.

In order to avoid the above-mentioned problem, the applicant of the present application has proposed a tension applying roll as shown in FIG. 5 in Japanese Patent Application No. 4-294287 (Japanese Unexamined Patent Application Publication No. 5-25361).
No. 5).

The tension applying roll indicated by reference numeral 10 in FIG. 5 inserts a large number of thin elastic disks 11 sequentially into a rigid main shaft 12,
Are compressed by the pressing plates 13 provided at both ends of the main shaft 12 in the axial direction of the main shaft 12 so as to be integrated.

More specifically, on the outer surface of the main shaft 12, ridges 14 are formed at four locations along the entire length thereof at intervals in the circumferential direction. A pressing plate 13 (13a) is integrally formed with one end of each of the plurality of elastic disks 11 sequentially fitted on the main shaft 12, and is supported integrally with the other end. 11
The other pressing plate 13 (13b) which is brought into contact with the other end of the
And a nut 15 for pressing the other pressing plate 13 b toward the elastic disk 11 is attached to the other end of the main shaft 12.

At the center of each of the elastic disks 11,
Through hole 16 having the same shape as the cross-sectional shape of main shaft 12
The inner surface of the through hole 16 is engaged with the ridge 14 of the main shaft 12 in the circumferential direction of the main shaft 12 so that the relative rotation of the main shaft 12 around the axis is restricted. It is designed to be able to be rotated integrally in the state in which it is performed.

The tension applying roll 1 constructed as described above.
0 is a plurality of cut strips 3a.
3b, 3c... Are arranged in a pair so that one tension applying roll 10 is pressed toward the other tension applying roll 10 by a predetermined pressure.
Each of the strips 3a, 3b, 3c,... Is held at a predetermined pressure, and a braking force is applied to each of the tension applying rolls 10 by a braking means 17 attached to each of the tension applying rolls 10. A predetermined back tension is applied to each of the strips 3a, 3b, 3c ... wound by the machine.

When the winding tension of the strip 3 applied in the tangential direction indicated by the arrow in FIG.
The portion close to the surface of No. 1 is deformed as shown in FIG. The amount of deformation σ in this case is proportional to the tension applied to each strip 3.
Therefore, when a braking force is applied to the main shaft 12 shown in FIG. 6 and the strip 3 is pulled by the winder 4, the tension applied to the strips 3a of each strip is expressed only by the difference in the deformation amount σ. Therefore, substantially uniform tension is applied to the strips 3a of each strip, and since there is no portion that can be flipped up during rotation, no noise is generated.

[0013]

By the way, in the tension applying roll 10 according to the above-mentioned application, the above-mentioned various effects can be obtained, but the structure is formed by assembling a large number of thin elastic disks 11. Therefore, the accuracy of the thickness of the rubber discs to be laminated is required to be high, which has the disadvantage that the disc material is inevitably expensive, and the labor cost is also high in the assembling process. There is also a disadvantage that requires.

Further, there are disadvantages in that the usable material is limited in forming the elastic disk, and it is difficult to form the elastic disk with excellent abrasion resistance, for example, urethane resin or the like.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior application, and when winding a plurality of strips, it is possible to suppress generation of noise and damage to the strips while suppressing them. An object of the present invention is to provide an inexpensive tension imparting roll that can be manufactured using a free material while providing a back tension.

[0016]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is particularly arranged at a stage preceding a winding machine for winding a number of strips, so that each of the strips can be wound. A tension applying roll for applying a back tension, comprising a roll central portion formed of a rigid material, and a roll outer peripheral portion formed integrally with an outer periphery of the roll central portion and formed of an elastic material. On the outer periphery of the roll, there are provided a large number of cuts of a predetermined depth for separating the elastic material without shaving them over the entire circumference and at predetermined intervals in the axial direction by using a very thin blade such as a razor. Features.

[0017]

According to the present invention, the tension applying roll is provided with a razor or the like on the outer periphery of the roll formed of an elastic material.
By providing a large number of cuts that separate the elastic material without scraping by a thin blade, the back tension on each band plate is generated by elastic deformation in the tangential direction of a large number of tension adjusting portions formed between these cuts. Is generated.

[0018] Therefore, there is no jumping part when the tension applying roll rotates, and the tension adjusting section is prevented from swinging in the axial direction.

Further, since the tension adjusting portion is formed by forming a cut in the outer peripheral portion of the roll made of an elastic material,
By a simple operation such as control of the pitch of the tension applying roll in the axial direction, the cutting position is positioned with high accuracy, and as a result, the dimensioning of the tension adjusting unit in the width direction can be performed with high accuracy and easily. It is performed.

Since the tension adjusting portion is formed by a mechanical process such as making a cut in the outer peripheral portion of the roll, the restriction on the material used in the outer peripheral portion of the roll is eased.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the following description, the same parts as those in FIGS. 4 to 6 are denoted by the same reference numerals, and the description is simplified.

In FIG. 1, reference numeral 20 denotes a tension applying roll according to the present embodiment.
A tension applying roll which is disposed in front of a winder 4 for winding a plurality of strips 3 and applies back tension to each of the strips 3 (3a, 3b, 3c) during winding. And a roll center portion 21 formed of a rigid material and a roll outer portion 22 integrally attached to the outer periphery of the roll center portion 21 and formed of an elastic material. Notch 22a of predetermined depth for separating elastic material without scraping
However, there is a schematic configuration in which a large number are provided over the entire circumference and at predetermined intervals in the axial direction.

To explain these details, the roll outer peripheral portion 22 is provided on the outer periphery of the roll central portion 21 formed of a highly rigid material such as a metal. The urethane has a high friction coefficient and a high abrasion resistance. Resin or the like is integrally coated. For example, the outer diameter d of the roll center portion 21 is equal to d =
350 mm, length L of the roll outer peripheral portion 22 = 1600
mm, the outer diameter D = 400 mm, and the depth H of the cut 22a formed on the outer periphery of the roll is 8 mm to 15 m.
m and the pitch of the cut 22a in the axial direction = 1
It is formed so as to be 0 mm to 20 mm, whereby a plurality of elastically deformable tension adjusting portions 22b (see FIG. 2) are formed between the cuts 22a.

Each of the cuts 22a is formed by cutting the elastic material without removing the elastic material with an extremely thin blade such as a razor after the roll outer peripheral portion 22 is covered with the roll central portion 21. For example, the roll outer peripheral portion 22 is rotated together with the roll central portion 21, and a notch 22a having a predetermined depth is formed by pressing a blade toward the roll outer peripheral portion 22. After the blade is separated in the radial direction, the above-mentioned operation is repeated by shifting the blade by a predetermined pitch in the axial direction, thereby forming the above-mentioned notches 22a and the tension adjusting portion 22b in contact with each other in the axial direction. In the tension applying roll 20 of the present embodiment configured as described above, the outer periphery of the roll central portion 21 formed of a rigid material is integrally covered with a roll outer peripheral portion 22 made of an elastic material. Since a number of the tension adjusting portions 22b are formed by forming the cuts 22a in the roll outer peripheral portion 22 with a cutting tool, these tension adjusting portions 22b are formed.
The width b is determined by the pitch of the blade in the axial direction of the tension applying roll 20, and the movement pitch is controlled with high accuracy by a simple operation of controlling the position of the blade.

Therefore, the dimensional control of the tension adjusting section 22b becomes easy, and the manufacturing cost of the tension applying roll 20 is greatly reduced.

The tension applying roll 20 is shown in FIG.
Are arranged above and below a plurality of strips 3a to be wound, and hold the strips 3 at a predetermined pressure.
In response to the braking force applied by the braking means 17, a back tension is provided to each of the strips 3a when it is wound.

The back tension is given by elastic deformation in the tangential direction of an annular tension adjusting portion 22b formed on the outer periphery of the roll outer peripheral portion 22, as shown in FIG. The difference between each strip 3
a is equal to the speed difference between the belt plates 3a, and therefore the difference in the applied tension is within the range of the speed difference between the strips 3a. In addition, there is no portion that can be flipped up during the rotation during the back tension application, and the relative movement in the axial direction is restricted by the tension adjusting portions 22b being brought into contact in the axial direction. Since the axial deflection of these tension adjusting portions 22b is prevented, noise is generated at the time of the winding operation, and the band plate 3a.
Damage is prevented.

It should be noted that the various shapes, dimensions, and the like of each component shown in the above-described embodiment are merely examples, and can be variously changed based on design requirements and the like.

For example, in the above-described embodiment, the roll outer peripheral portion 22 is integrated with the outer periphery of the roll center portion 21 to restrict the relative rotation about the axis. Similarly to the proposal, the roll center portion 21 and the roll outer peripheral portion 22 are configured to be able to penetrate in the axial direction, and a ridge is formed on the outer surface of the roll center portion 21 along the axial direction. Grooves are formed on the inner surface of the portion 22 so that the ridges can be fitted in the axial direction, and the engagement between the ridges and the grooves in the circumferential direction allows the shaft between the roll center portion 21 and the roll outer peripheral portion 22 to be formed. It is also possible to restrict the relative rotation around.

A similar effect can be obtained by forming the main shaft 12 in a non-circular shape such as a polygonal shape or an elliptical shape without providing the protrusions 14.

Further, the outer diameter d of the roll center portion 21, the outer diameter D of the roll outer peripheral portion 22, the depth H of the cut 22 a, the width of the tension adjusting portion 22 b, etc.
It is set arbitrarily based on the material used for No. 2, the size of the back tension to be applied, and the like.

[0032]

As described above, according to the tension applying roll of the present invention, the center of the roll formed of a rigid material and the outer periphery of the center of the roll are integrally attached and formed of an elastic material. The outer periphery of the roll has an extremely thin blade such as a razor.
With this configuration, a plurality of cuts having a predetermined depth for separating the elastic material without scraping are provided over the entire circumference and at predetermined intervals in the axial direction, so that the intervals between these cuts form the cuts. For the extremely thin
The cutting tool can be manufactured with high accuracy by a simple operation of controlling the position of the tension applying roll in the axial direction.

Therefore, the manufacturing cost of the tension applying roll can be greatly reduced, and the limitation of the usable elastic material is relaxed, so that a material such as urethane resin can be freely selected.

Further, the deformed portion of the outer peripheral portion of the roll is formed in an annular shape, so that there is no portion that can be flipped up during the rotation at the time of applying the back tension, and
By virtue of the fact that these deformed portions are brought into contact in the axial direction, vibrations and the like are prevented, and it is possible to prevent generation of noise and damage to the strip during the winding operation.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a tension applying roll according to an embodiment of the present invention.

FIG. 2 is a side view of a tension applying roll according to an embodiment of the present invention.

FIG. 3 is a schematic diagram for explaining a back tension adding function by a tension applying roll according to one embodiment of the present invention.

FIG. 4A is a schematic explanatory view of a slitter line,
(B) is a perspective view which shows the use state of the tension roll.

FIG. 5 is an exploded perspective view of a tension applying roll in the previous proposal.

FIG. 6 is a perspective view showing a use state of a tension applying roll in the previous proposal.

FIG. 7 is a schematic diagram for explaining a back tension adding function by a tension applying roll in the previous proposal.

[Explanation of symbols]

 3a to 3c Strip plate 4 Winding machine 6 Winding coil 20 Roll for tension application 21 Roll center 22 Roll outer periphery 22a Cut 22b Tension adjusting unit

Claims (1)

(57) [Claims] 1. A tensioning roll, which is disposed in front of a winding machine for winding a plurality of strips and applies back tension to each of the strips during winding, formed of a rigid material. A roll center portion, and a roll outer peripheral portion integrally attached to the outer periphery of the roll center portion and formed of an elastic material. The roll outer peripheral portion is provided with an extremely thin blade, such as a razor, for the elasticity. A tension applying roll, wherein a number of cuts having a predetermined depth for separating the material without scraping are provided over the entire circumference and at predetermined intervals in the axial direction.