JPH1044092A - Slitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slitter which can slit at one stroke with a narrow width, for example, a width of about 100mm or less. SOLUTION: A slitter comprises a lower blade 1 which is rotatably journaled on a support shaft 2 and an upper blade 3 which shears a web in association with the lower blade 1 and a drive disc 4 which is fixed to a drive shaft 5 which is rotated with a drive source. An external periphery of a drive disc 4 is arranged so as to come into contact with the external periphery of the lower blade 1. The lower blade 1 is rotated with friction with the drive disc 4. Since no motor is directly connected to the lower blade 1, a gap between adjacent blades 1, namely a minimum slit width can be minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a slitter. More specifically, the present invention relates to a slitter for feeding a web of paper, nonwoven fabric, film, or the like from a raw roll and rewinding the web into a product roll having a predetermined diameter and a predetermined width by a winder, to cut the web to a predetermined width.

[0002]

2. Description of the Related Art A slitter is installed between a material roll and a product roll of a winder. A typical configuration of a conventional slitter is shown in FIG. In the figure, 51 is an upper blade, 5
2 is a lower blade, which is a shearing action of the upper blade 51 and the lower blade 52,
We cut the web continuously. The lower blade 52 is directly connected to a motor 53 and is rotated by the motor 53. That is, for the lower blade, the motor direct drive system is the common sense so far.

[0003]

However, in actual manufacturing sites and processing plants for webs such as paper, non-woven fabrics, films, etc., very narrow slit widths, for example, 100 mm or less, may be required. However, in the above-described conventional example, the sum of the thickness of the lower blade 52 and the width of the motor 53 is the minimum slit width, but the thickness of the lower blade 52 is at least 50 m including mounting parts.
m, motor 53 has a minimum width of about 150 mm even with a small capacity
Therefore, the minimum slit width d must be about 150 mm, which is the same as the width of the motor 53.

Therefore, hitherto, a wide slit is once again slit by a narrow slitter. However, performing the slit processing in two steps involves a problem that the number of steps is extremely increased and that the precision of the slit width is difficult to obtain when re-slitting.

[0005] In place of the above-mentioned two-stage processing, a winder which inserts a slitter lower blade into a shaft at a fixed interval in a ring shape and enables narrow and multi-cutting is sometimes used. However, the slitter in which the lower blade is inserted into the shaft in multiple stages in a ring shape has the following structural defects. First, the work is complicated because the blade cannot be replaced alone. Secondly, it is difficult to employ a wide winder due to its structure because the support shaft is bent. Third, a single common support shaft is liable to cause motion blur due to an increase in speed, and is difficult to employ in a high-speed winder exceeding 800 m / min.

Accordingly, an object of the present invention is to provide a slitter which can be slit at a time with a narrow slit width, for example, a width of about 100 mm or less, has a simple structure, and can be operated at high speed.

[0007]

According to a first aspect of the present invention, there is provided a slitter rotatably supported by a support shaft and provided with a plurality of lower blades spaced apart in the axial direction, and cooperating with the lower blade. A plurality of upper blades for cutting the web by a driving source, and the same number of drive disks as the lower blades fixed on a drive shaft rotated by a drive source. It is characterized in that it is arranged so as to be in contact with. The slitter according to claim 2, wherein the drive shafts are arranged one by one on both sides of a support shaft that supports the lower blade, and a drive disk fixed to one drive shaft and a drive disk fixed to the other drive shaft are alternately arranged. Preferably, the plurality of lower blades are brought into contact with each other. According to a third aspect of the present invention, in the slitter, the driving disk is provided with an outer band made of a high friction material having a high friction coefficient.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. 1 is a side view of a slitter S according to an embodiment of the present invention, FIG. 2 is a plan view showing a lower blade and a driving disk of the slitter S, FIG. 3 is an enlarged view of the lower blade and a driving disk,
FIG. 4 is a schematic diagram of a winder to which the present invention is applied.

First, a winder to which the slitter S of the present invention is applied will be described with reference to FIG. In the figure, Ro is a raw material roll, and a web w fed out is slit into a plurality of rows having a predetermined width by a slitter S, and is wound up as a product roll R by a winder WD. E is an ejector that sucks and sends trim such as chips.

Next, details of the slitter S will be described with reference to FIGS. Reference numeral 1 denotes a lower blade, and an arbitrary number of the blades are rotatably mounted in the axial direction of the support shaft 2. Reference numeral 3 denotes a known upper blade, which is provided in association with each lower blade 1 so that the outer peripheral side edges are brought into contact with each other and the web w is slit by a shearing action. Reference numeral 4 denotes a driving disk, which is fixed to a driving shaft 5. In the illustrated example, the driving disk 4 and the driving shaft 5
Are arranged so that the left and right driving disks 4 alternately contact the plurality of lower blades 1.

A belt pulley 6 is mounted on the drive shaft 5, and the drive shaft 5 is rotated by a belt driven by a drive motor (not shown). The drive shaft 5
The driving method may be arbitrary. In addition to the above-described belt driving, power may be transmitted by a chain or a gear transmission mechanism, or a driving source such as a motor with a reduction gear may be directly connected.

The attachment of the lower blade 1 to the support shaft 2 and the attachment of the drive disk 4 and the pulley 6 to the drive shaft 5
It is preferable to use a spline shaft or a spline ball bearing because a large driving torque can be obtained and the mounting position in the axial direction can be arbitrarily changed.

Next, the details of the lower blade 1 and the driving disk 4 will be described with reference to FIG. The lower blade 1 is composed of a disk body 12 and a blade 13 formed on the outer peripheral side surface of the disk body 12 via a bearing 11 so as to be rotatable via a bearing 11, similarly to the known example. The outer peripheral surface of the drive disc 13 is flush with the outer belt 43 of the drive disk 4.

The driving disk 4 includes a boss 41 integrally fixed to the driving shaft 5, a disk 42 fixed to the boss 41, and an outer band 43 covering the outer periphery of the disk 42. The outer band 43 is made of a high friction material such as rubber having a high friction coefficient, for example, urethane rubber, and has a high grip force.

In the slitter of this embodiment, when the drive shaft 5 is rotated to rotate the drive disk 4, the lower blade 1 in surface contact with the drive disk 4 is also rotated, and the web is slit together with the upper blade 3. be able to. Since the grip force is enhanced by the urethane rubber outer band 43 of the driving disk 4, no slip occurs between the lower blade 1 and the lower blade 1 can be efficiently rotated.

As shown in FIG. 2, in the slitter of this embodiment, the motor is not located near the lower blade 1, and only the driving disk 4 which is a thin disk is structurally located. As a result, the dimension between the adjacent lower blades 1 and 1, that is, the slit width D can be made very small. For example,
As shown in FIG. 2, in the embodiment in which the drive shafts 5 are arranged in two rows on the left and right, and the drive discs 4 are arranged alternately on the left and right, about 30 mm
This makes it possible to achieve a narrow slit width of about 1/5 of the conventional one.
Since the lower blades 1 are individually attached to the support shafts 2, no matter how long the surface length of the winder is increased, the number of the lower blades 1 and the driving disks 4 can be increased without changing the basic structure. . Furthermore, since the support shaft 2 can be designed according to the surface length and speed of the winder, there is no restriction on speeding up the winder. In addition, replacement of a blade such as a lower blade can be easily performed.

Next, another embodiment of the present invention will be described. In the above embodiment, two drive shafts 5 are arranged on the left and right. However, in order to simplify the structure, one drive shaft 5 is used.
The drive disk 4 may be brought into contact with all the lower blades 1 from the same one side. In this case, the minimum slit width is somewhat widened, but a narrow slit of about 60 mm can still be widened.

[0018]

According to the first aspect of the present invention, the motor is not located near the lower blade 1 and only the driving disk which is a thin disk is structurally located. The dimension between the blades, that is, the slit width can be made very narrow. According to the second aspect of the present invention, since the drive disk can be alternately contacted with the plurality of lower blades from the left and right, the narrowest slit width can be realized, and the blade (lower blade) can be easily replaced. Become. According to the third aspect of the present invention, since the grip force is enhanced by the outer band, no slip occurs between the lower blade and the lower blade, and the lower blade can be rotated efficiently.

[Brief description of the drawings]

FIG. 1 is a side view of a slitter S according to an embodiment of the present invention.

FIG. 2 is a plan view showing a lower blade 1 and a driving disk 4 of a slitter S according to the embodiment.

FIG. 3 is an enlarged view of a lower blade 1 and a driving disk 4;

FIG. 4 is a schematic view of a winder to which the present invention is applied.

FIG. 5 is a front view of a conventional slitter.

[Explanation of symbols]

 Reference Signs List 1 lower blade 2 support shaft 3 upper blade 4 drive disk 5 drive shaft 6 belt pulley

Claims (3)

[Claims] 1. A plurality of lower blades rotatably supported on a support shaft and spaced apart in an axial direction, and a plurality of upper blades for cutting a web in cooperation with the lower blades. The lower blade fixed on a drive shaft rotated by a drive source, comprising the same number of drive disks, wherein the drive disk is arranged such that its outer circumference is in contact with the outer circumference of the lower blade. Slitter to do. 2. The drive shaft is disposed one by one on both sides of a support shaft that supports the lower blade, and a drive disk fixed to one drive shaft and a drive disk fixed to the other drive shaft are alternately arranged. The slitter according to claim 1, wherein the plurality of lower blades are brought into contact with each other. 3. A slitter according to claim 1, wherein said drive disk is provided with an outer band made of a high friction material having a high friction coefficient.