JP3076247B2 - Slitter - Google Patents

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]

Of claim 1 slitter SUMMARY OF THE INVENTION are rotatably supported on a support shaft, and a plurality of lower blades which are spaced apart in the axial direction, respectively cooperating in respective lower blade The upper blades, which work to cut the web ,
Are arranged one by one, consists of a pair of drive <br/> shaft which is rotated, the front Symbol lower blade as many driving disk by a driving source, the double
One of the lower blades so that it contacts the odd lower blade.
The drive shaft on one of the drive shafts with an interval in the axial direction.
A plurality of driving disks among the disks are fixed, and the plurality of lower blades are fixed.
Drive the other so that it contacts the even-numbered lower blade
On the shaft, the remaining drive disks are spaced at intervals in the axial direction.
Fixed, each drive disk, characterized in that attached the outer band made of high friction material having a high coefficient of friction.

[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 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 large the surface length of the winder is, it is possible to cope with the basic structure without changing the basic structure only by increasing the number of the lower blades 1 and the driving disks 4. . 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.

[0017]

According to the first aspect of the present invention, the motor is not located near the lower blade, and only the driving disk, which is a disk having a small thickness, is located. The dimension between them, ie the slit width, can be very narrow. In addition, since the drive disk can alternately contact 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. Furthermore, as the grip power is enhanced by the outer band,
Slip does not occur between the lower blade and the lower blade, and the lower blade can be efficiently rotated.

[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 (1)

(57) [Claims] An axially rotatably supported shaft is provided on a support shaft.
A plurality of lower blades provided separately,Each On the lower bladeRespectivelyMultiple webs working together to cut the web
The upper blade,One on each side of the spindle, Rotation by drive source
TurnedPair ofDrive shaftWhen, Previous It consists of the same number of drive disks as the lower blade,Contact the odd-numbered lower blade of the plurality of lower blades
On one of the drive shafts with a spacing in the axial direction.
A plurality of driving disks are fixed among the driving disks, So that it contacts the even-numbered lower blade of the plurality of lower blades.
At the same time on the other drive shaft with a space in the axial direction.
Drive disk is fixed,  Each of the driving disks is made of a high friction material having a high friction coefficient.
Attach exterior bandIsSlitter characterized by
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