JPH10277992A - Slitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slitter to carry out a slit cutting in the running direction between the ring form receiver blade of a receiver blade roll and a disk form cutting edge, while running continuously by contacting a web to the receiver blade using an air shaft, which can carry out the position setting of the ring form receiver blade of the receiver blade roll easily and efficiently, when the slit cutting width is changed partially. SOLUTION: In a slitter in which plural ring form receiver blades 2... and plural ring form spacers are fitted and fixed to an air shaft furnishing lug projections 12a... so as to compose a receiver blade roll, the slitter consists of the first spacers 31... in which plural ring form spacers are fixed to the air shaft 1 being pressed by the lug projections 12a... to the inner peripheral surface; and the second spacers 32... which have recesses 33 to house the lug projections 12a... in the projecting time to the inner peripheral surface, and are fastened and fixed to the air shaft 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web made of paper, a film of synthetic resin or metal foil, a woven fabric, a non-woven fabric, a laminate thereof, or the like. A slitter that slit-cuts in the running direction between a ring-shaped receiving blade fitted to the shaft of the blade roll and a disk-shaped cutting blade that is in contact with the ring-shaped receiving blade, particularly an air in which the shaft of the receiving blade roll has a plurality of radial lug protrusions It relates to a slitter consisting of a shaft.

[0002]

2. Description of the Related Art Generally, a receiving roll of a slitter is
A plurality of ring-shaped receiving blades (also referred to as lower blades) each having a peripheral edge on one shaft and a plurality of ring-shaped spacers interposed between the ring-shaped receiving blades are fitted and fixed on one shaft. Usually, the outer peripheral surface of the ring-shaped receiving blade and the ring-shaped spacer having the same outer diameter constitutes a discontinuous roll surface. While continuously running the web in contact with the roll surface, each ring-shaped receiving surface is formed. The web is slit-cut in the running direction between a blade and a disk-shaped cutting blade (also referred to as an upper blade) which is in contact with the blade. In recent years, an air shaft has been widely used as a shaft of the receiving blade roll.

[0003] As is well known, this air shaft has a plurality of short axially extending radially arranged outer circumferential surfaces inside a metal tube shaft having a number of short slit-shaped windows formed on the peripheral surface thereof. A rubber tube provided with ridge-shaped lug projections is fitted so that each lug projection faces the slit-shaped window portion, and the air pressure in the rubber tube can be increased or decreased. Although each lug projection is lower than the surface of the tube shaft, when the air pressure is increased, each lug projection protrudes from the slit-shaped window due to expansion of the rubber tube.

Therefore, in the receiving blade roll using the air shaft, a ring-shaped receiving blade and a ring-shaped spacer having an inner diameter slightly larger than the outer diameter of the tube shaft of the air shaft are used, and these are used as the air shaft. After being fitted in a loose fit state under reduced pressure and positioning by axial movement, the air pressure is increased, so that lug projections protruding from the slit-shaped window portion are pressed against these inner peripheral surfaces to press them. It is fixed to the air shaft. In order to facilitate attachment and detachment to the air shaft, the ring-shaped spacer is divided into a pair of semi-circular bodies, and both ends of both semi-circular bodies are connected to each other with a screw member to form an integral ring. It is widely used. Further, as the ring-shaped receiving blade, one that is fixed only by pressing the lug protrusion, and one that is fixed by pressing a set screw screwed in from the side against the pipe shaft surface in addition to pressing the lug protrusion. There is.

[0005]

In the receiving blade roll using the air shaft as described above, a plurality of ring-shaped receiving blades and ring spacers fitted on the air shaft are collectively operated only by increasing or decreasing the air pressure. Since it is possible to convert between the fixed state and the loosely-fitted state, the operation of adjusting and fixing the positions of these receiving blades and spacers is very easy compared to receiving blade rolls not using the air shaft. Such a problem has arisen.

For example, in the papermaking field, when manufacturing various paper products such as coated paper from base paper after papermaking,
In order to cope with recent high-mix low-volume production, three B4 plates and three A4 plates are cut from a single wide sheet of paper. In many cases, a plurality of sheets having different widths, such as one sheet of the B5 size, are taken simultaneously.
In such a case, for example, due to fluctuations in product inventory, order types and quantities, various reasons at the intermediate processing stage, etc., for example, A is replaced with one B4 plate and one B5 plate in the above.
Frequently, the slit cutting width is changed only for a part of the original paper width, such as taking two sheets of four plates. However, at the time of this partial change, on the receiving blade roll side, of the plurality of slit cutting positions previously set, the non-changed portion is left as it is, and the ring-shaped receiving blade corresponding to the portion requiring change is changed. The position change, the number of ring-shaped spacers within the change width, and the exchange with a spacer having a different width may be performed.

However, in reality, the fixing of all the receiving blades and the spacers is simultaneously released by the decompression of the air shaft, so that the receiving blade and the spacer can be freely moved in the axial direction on the pipe shaft. The original setting position of the receiving blade is not guaranteed by the lower concentricity of the shaft due to the lack of support by the lug projection), so the positions of all the receiving blades are determined sequentially from one end of the air shaft. There was a problem that it was necessary to readjust, and a great deal of labor and time was spent. Moreover, especially when high dimensional accuracy is required depending on the type of paper, even if the positions of all the receiving blades are once precisely set by the above readjustment, when the pressure of the air shaft is increased next time,
Since the receiving blade is easily displaced in the process of lifting from the lower eccentric state to the concentric state due to the protruding lug projection, the receiving blade position after fixing is often slightly deviated from the set position, and every time the air shaft is depressurized again It is necessary to repeat the operation of performing fine adjustment and dimension measurement after pressure increase, and it is usually necessary to perform fine adjustment three to four times until the fixing is completed. Such a problem is not limited to paper, but is common to various webs that are cut by a similar slitter.

[0008]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention provides a ring-shaped receiving blade of a receiving blade roll and a pair of receiving blade rolls while continuously running the web in contact with the receiving blade roll using an air shaft. Provided is a slitter for slit-cutting in the running direction between a contacting disc-shaped cutting blade and a slitter that can easily and efficiently set the position of the ring-shaped receiving blade on a receiving blade roll when partially changing the slit cutting width. It is an object.

In order to achieve the above object, a slitter according to a first aspect of the present invention is provided with an air shaft 1 having a plurality of radial lug projections 12a on one side. A plurality of ring-shaped receiving blades 2 having a peripheral edge as a blade portion 20 and a plurality of ring-shaped spacers 3 are fitted and fixed to form a receiving blade roll 10. Web W that runs continuously in contact
Are slit-cut in the running direction between each of the ring-shaped receiving blades 2 and the disk-shaped cutting blades 4 which are in contact with the ring-shaped receiving blades 2 in the slitter.
Are fixed to the air shaft 1 by pressing the lug projections 12a... Against the inner peripheral surface 31a, and the lug projections 12 when projecting from the inner peripheral surface 32a.
a are provided, and the second spacers 32 are tightened and fixed to the air shaft 1.

In the construction of the first aspect, the second spacers 32 of the receiving blade roll 10 are connected to the air shaft 1.
To the inner peripheral surface 32a.
3 can accommodate the lug protrusions 12a at the time of protrusion, the protrusion operation of the lug protrusions 12a by the pressurization of the air shaft 1 is not hindered.
And the first spacers 31 can be fixed without any trouble. If the pressure of the air shaft is reduced when the slit cutting width is partially changed, the fixing of the ring-shaped receiving blades 2 and the first spacers 31 is released by the retreating operation of the lug projections 12a. Of the ring-shaped receiving blades 2 and other ring-shaped spacers 3 on the basis of this fixed position without releasing the fixing of the second spacer 32 in the non-change area. ... can be set.

According to a second aspect of the present invention, in the slitter of the first aspect, the second spacer 32 is disposed in contact with the side end surface 2b of the ring-shaped receiving blade 2 opposite to the blade portion 20 side. It adopts the configuration that has been done. In this configuration, when the air shaft of the receiving blade roll 10 to which the ring-shaped receiving blades 2 and the ring-shaped spacers 3 are fixed is depressurized, each of the ring-shaped receiving blades 2 is connected to the air shaft 1 with the release of the fixing. Although it is displaced from the concentric position to the lower eccentric position, since it is in contact with the second spacer 32 that keeps the fixed state, there is no axial displacement caused by the displacement operation. Also, when the ring-shaped receiving blades 2 return from the unlocked state to the fixed state due to the above-mentioned conversion from the reduced pressure state to the pressurized state of the air shaft 1, the axial direction of the air-shaft 1 is restricted by the second spacer 32. The displacement is prevented. Therefore, when a part of the slit cutting width is changed, the position of the ring-shaped receiving blades 2 corresponding to the portion that needs to be changed is changed, while the unchanged portion is left as it is among the plurality of slit cutting positions previously set. In this case, the number of ring-shaped spacers 3 within the change width may be increased / decreased, or replaced with a spacer having a different width. The first spacer 3
Since 1 only needs to constitute the roll surface of the receiving blade roll 10, a certain amount of axial displacement is allowed.

According to the third aspect of the present invention, in the first or second aspect,
In the slitter, the second spacer 32 is
A pair of semi-circular bodies 32A and 32B are formed by connecting both ends to each other with screw members 5 and 5 to form a ring, and the air shaft 1 is sandwiched between the two semi-circular bodies 32A and 32B. Is tightened to fix the air shaft 1 tightly. Therefore, when the second spacer 32 is attached or detached, it is not necessary to remove the air shaft 1 from the machine frame for insertion / extraction from the shaft end.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the slitter according to the present invention will be specifically described below with reference to the drawings.
This slitter, as shown in FIG.
The web W fed via the receiving blade roll 10 is continuously moved in contact with the roll surface of the blade roll 10, and between the ring-shaped receiving blade 2 of the receiving blade roll 10 and the disc-shaped cutting blade 4 in contact therewith, The web W is continuously slit-cut in the running direction.

As shown in FIG. 2, the receiving blade roll 10 comprises:
A plurality of ring-shaped receiving blades 2 arranged at intervals corresponding to a desired slit cutting width on an air shaft 1 rotatably mounted on a machine frame 7 via bearings 8 in a horizontal state;
These ring-shaped receiving blades 2 and ring-shaped spacers 3 ...
The roll surface is constituted by setting the outer diameters of the rolls equal. On the other hand, a horizontal frame 9 is disposed diagonally below the receiving blade roll 10 in parallel with the receiving blade roll 10, and a guide rail 9 a fixed to the front surface of the horizontal frame 9 is provided with a lifting cylinder 42. Is mounted so as to be horizontally movable, and a lifting rod 42a protruding upward from the lifting cylinder 42.
A drive motor 44 is supported on the upper end of the drive motor 44 via a buffer spring 43, and the disc-shaped cutting blade 4 is fixed to a drive shaft of the drive motor 44. 4a is a protective cover for the disc-shaped cutting blade 4. In FIG. 2, the slide frame 41 is used.
Although only one of them is shown as a representative and the other is not shown, the same number of slide frames 41... Of the same configuration are held on the guide rails 9 a as the ring-shaped receiving blades 2. The disc-shaped cutting blades 4 of the frame 41 are arranged so as to be in contact with the ring-shaped receiving blades 2 respectively. The air shaft 1 is rotatably driven by a driving mechanism (not shown) on an end side.

The air shaft 1 of the receiving blade roll 10 is
As shown in FIGS. 3 to 6, a metal pipe shaft 11 having a number of short slit-like windows 11a...
Inside, a rubber tube 12 provided with a number of short ridge-shaped lug protrusions 12a along the axial direction radially arranged on the outer peripheral surface,
Each lug protrusion 12a is fitted so as to face the slit-shaped window 11a, and the air pressure in the rubber tube 11 can be increased or decreased. Although it is lower than the surface, when the air pressure is increased, each lug protrusion 12a is configured to protrude outward from the slit window 11a by expansion of the rubber tube 12. In this embodiment, the slit-shaped windows 11a of the air shaft 1 and the lug projections 12a of the rubber tube 11 are each alternately arranged at intervals of 45 degrees along the axial direction at four locations at intervals of 90 degrees in the circumferential direction. It is formed so as to be arranged with a phase difference.

As shown in FIGS. 3 and 5, the ring-shaped receiving blade 2 is provided with an annular recess 21 at one side end surface 2a at an intermediate position in the thickness direction. By forming a tapered surface that lowers the axial center side, the outer peripheral edge of the side end surface 2a forms an acute angled blade portion 20, and the inner diameter is set slightly larger than the outer diameter of the tube shaft 11 of the air shaft 1. Have been. Therefore, while the air shaft 1 is in a non-fixed state in which it can rotate and move in the axial direction when the air shaft 1 is depressurized, the protruding lugs 12a... Fixed to In the ring-shaped receiving blade 2 of this embodiment, the fixed state can be further strengthened by pressing the tip of the set screw 22 which is screwed in from the side after the fixing, against the surface of the tube shaft 11 of the air shaft 1. It has become.

The ring-shaped spacers 3 are, like the ring-shaped receiving blades 2, provided with lug projections 1 caused by pressurization of the air shaft 1.
The first spacers 31 are fixed to the air shaft 1 by the projections 2a, and the second spacers 32 are tightly fixed to the air shaft 1 without using the lug projections 12a. As shown in FIGS. 2 and 3, the second spacers 32 are arranged in contact with the side end surfaces 2 b of the ring-shaped receiving blade 2 on the side opposite to the blade portion 20 side. Also, the first spacers 31 ...
Are arranged so as to form a roll surface by filling the remaining area on the air shaft 1 on which the ring-shaped receiving blades 2 and the second spacers 32 are arranged in accordance with the arrangement interval of the ring-shaped receiving blades 2. , A plurality of types having different widths are arranged with a small space therebetween.

As shown in FIG. 6, the first spacer 31 is composed of a pair of semicircular bodies 31A and 31B, and the inner surfaces of the two semicircular bodies 31A and 31B are joined to each other with the air shaft 1 interposed therebetween. Bolts 5, 5 inserted from bolt insertion recesses 3a formed on the outer periphery of semicircular body 31B side
Into the semi-circular body 31A in the tangential direction to be connected and integrated, so that the air shaft 1
It is designed to fit into. However, like the ring-shaped receiving blade 2, the inner diameter in the ring form is set slightly larger than the outer diameter of the tube shaft 11 of the air shaft 1, and can rotate and move in the axial direction under reduced pressure of the air shaft 1. While the air shaft 1 is pressurized, the protruding lugs 12a are fixed to the air shaft 1 by being pressed against the inner peripheral surface. The two semicircular bodies 31A and 31B are, as shown in FIG.
The connection is made by two pairs of bolts 5... For a large width, and by a pair of bolts 5 for a small width.

On the other hand, as shown in FIG. 4, the second spacer 32 is composed of a pair of semi-circular bodies 32A, 32B similarly to the first spacer 31, and the two semi-circular bodies 32A, 32B.
The ends of 2B are connected to each other via bolts 5 to form a ring. However, both semicircular arcs 3
The inner circumferences of 2A and 32B form an arc that matches the outer circumference of the air shaft 1, and the combined length of the inner circumferences of the two semicircular bodies 32A and 32B is slightly shorter than the outer circumference of the air shaft 1. Are formed on the inner peripheral surface, and concave portions 33... Are formed along the axial direction for receiving the lug protrusions 12a. In the present embodiment, the recesses 33 are formed in the circumferential direction so as to correspond to the case where the second spacers 32 are arranged at positions where the arrangement of the lug protrusions 12a of the air shaft 1 is changed by a phase difference of 45 degrees in the circumferential direction. It is formed at eight locations evenly distributed at 45 degrees.

In order to fit the second spacer 32 onto the air shaft 1, the two semicircular bodies 32A, 32B are arranged such that the recesses 33 face the protruding positions of the lug projections 12a.
Is fitted to the air shaft 1 from both sides, and the semicircular body 32
The bolts 5 inserted from the bolt insertion recesses 3a formed on the outer periphery on the B side are screwed into the semicircular body 32A in the tangential direction and tightened.
When the air shaft 1 is pressurized, the lugs 12a projecting from the second spacer 32
3, the lug projections 12a are not hindered from projecting, and the pressure fixes the ring-shaped receiving blades 2 and the first spacers 31 without any trouble.

In the slitter having the above structure, after the web W is slit into required widths, a part of the slit width is changed due to a change in product stock, order type and quantity, and various reasons at the intermediate processing stage. When the air shaft 1 is decompressed, lug protrusions 12a are required.
, The fixing of the ring-shaped receiving blades 2 and the first spacers 31 is released, but the second spacers 32 maintain the fixed state. Therefore, of the plurality of slit cutting positions previously set, the non-changed portion is left as it is, the position of the ring-shaped receiving blades 2... Corresponding to the portion requiring change is changed, and the ring-shaped spacer within the changed width. 3. The number of (the first spacer 31 and the first spacer 31) may be increased / decreased or exchanged for one having a different width. When the position of the ring-shaped receiving blades 2 is changed, the second spacers 32, which are in the above-mentioned non-changed portion and keep the fixed state, can be used as a reference for dimension setting. It can be performed efficiently.

On the other hand, when the air shaft 1 is depressurized as described above, the ring-shaped receiving blades 2 are no longer supported by the lug projections 12a as the fixing is released. Although it is displaced to a lower eccentric position, that is, a state of directly contacting the upper part of the outer periphery of the air shaft 1, the contact with the second spacer 32 that maintains the fixed state causes the axial displacement to be caused by this displacement operation. Will not occur. Also, when the air shaft 1 is changed from the above reduced pressure state to the pressurized state after the position change,
The ring-shaped receiving blades 2 are lifted from the lower eccentric position to the concentric position by the projections of the lug projections 12a, but also in this return operation, due to the regulating action of the adjacent fixed second spacer 32, the ring-shaped receiving blades 2 are moved in the axial direction. The displacement is prevented. Therefore, even when strict precision is required for the slit cutting width, it is not necessary to repeatedly finely adjust the position of the ring-shaped receiving blades 2 by repeatedly increasing and reducing the pressure of the air shaft 1 as in the related art.

Since the first spacers 31 may be configured to form the roll surface of the receiving roll 10, a certain amount of axial displacement caused by increasing and decreasing the pressure of the air shaft 1 is allowed. On the other hand, the position change on the side of the disc-shaped cutting blades 4... Can be easily performed by the horizontal movement of the slide frame 41 as in the related art.

In the present invention, the first and second spacers 31 and 32 are not limited to those having a two-part structure composed of a pair of semicircular bodies as in the above-described embodiment, but may be divided at one location in the radial direction. It is also possible to use a ring structure which is fastened and fixed to the air shaft 1 by connecting and tearing the ruptured portion with a screw member. However, in the ring-opening structure, the air shaft 1 must be fitted and inserted from one end of the air shaft 1 like the ring-shaped receiving blade 2. Since it is necessary to remove it from the frame 7, it is inconvenient as compared with the above-described two-part structure. Further, the ring-shaped receiving blade 2 does not have a fixing function by the set screw 22 as in the embodiment, and may be configured to be fixed only by the lug protrusions 12a. The lug projections 12a of the air shaft 1 are not limited to those formed integrally with the rubber tube 12 as shown in the figure, but may be formed separately from the rubber tube 12 by bonding to the surface of the tube or fusing. May be fixed. Further, the second spacer 32 can be fitted at a position not adjacent to the ring-shaped receiving blade 2.

In addition, in the present invention, the dimensions, number and arrangement of the ring-shaped receiving blade 2, the first and second spacers 31 and 32, and the lug projections 12a in the receiving blade roll 10, the dimensions of the air shaft 1, and the disk The design of the detailed configuration such as the structure of the support portion of the cutting blade 4 can be changed in various ways other than the embodiment. The web W to be subjected to the slit cutting includes various materials such as paper, a film of synthetic resin or metal foil, a woven fabric, a nonwoven fabric, and a laminate thereof.

[0026]

According to the first aspect of the present invention, while the web is in continuous contact with the receiving blade roll using the air shaft, the ring-shaped receiving blade of the receiving blade roll and the disc-shaped cutting blade in contact therewith. A plurality of ring-shaped spacers fitted on the air shaft as slitters for slit cutting in the running direction between the first spacer and the first spacer fixed to the air shaft by pressing a lug projection against an inner peripheral surface. Since the second spacer is fastened and fixed to the air shaft, when the slit cutting width is partially changed, the position of the ring-shaped receiving blade in the receiving roll can be easily adjusted with reference to the second spacer. There is provided an apparatus which can be set efficiently and the labor and time required for this position setting can be remarkably reduced as compared with the related art.

According to the second aspect of the present invention, in the slitter, since the second spacer is disposed in contact with the ring-shaped receiving blade, the second spacer is set first when partially changing the slit cutting width. Of the multiple slit cutting positions, the non-changed portion is left as it is, and the position of the ring-shaped receiving blade corresponding to the portion requiring change is changed, and the number of ring-shaped spacers in the changed width and the width of the ring-shaped spacer are different. Replacement may be performed, thereby improving the work efficiency in partially changing the slit cutting width, and increasing or decreasing the air shaft as in the conventional case even when high dimensional accuracy is required especially for the web slit cutting width. There is an advantage that it is not necessary to repeatedly finely adjust the position of the ring-shaped receiving blade by repeating the pressure.

According to the third aspect of the present invention, there is an advantage in the above-mentioned slitter that the second spacer can be easily attached to and detached from the air shaft.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a slitter according to one embodiment of the present invention.

FIG. 2 is a front view of a main part of the slitter.

FIG. 3 is a front view of a main part of a receiving blade roll in the slitter.

FIG. 4 is a sectional view taken along the line II in FIG. 3;

FIG. 5 is a cross-sectional view taken along a roll line in FIG. 3;

FIG. 6 is a sectional view taken along the line C-A in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air shaft 10 Receiving blade roll 11 Pipe shaft 11a Slit-like window part 12 Rubber tube 12a Lug protrusion 2 Ring-shaped receiving blade 2a, 2b Side end face 20 Blade part 3 Ring-shaped spacer 31 First spacer 31A, 31B Semicircular body 32 Second spacer 32A, 32B Semicircular body 4 Disc-shaped cutting blade 5 Bolt (screw member) W Web

Claims (3)

[Claims] 1. An air shaft having a plurality of radial lug protrusions, a plurality of ring-shaped receiving blades having one outer peripheral edge as a blade portion, and a plurality of ring-shaped spacers fitted and fixed, and a receiving blade roll. In the slitter, which continuously cuts the web in contact with the roll surface of the receiving blade roll, slit-cuts in the running direction between each of the ring-shaped receiving blades and the disc-shaped cutting blades opposed thereto. The plurality of ring-shaped spacers have a first spacer fixed to the air shaft by pressing the lug protrusion against an inner peripheral surface, and a concave portion for receiving the lug protrusion when protruding on the inner peripheral surface. A slitter comprising a second spacer which is fixedly fastened to an air shaft. 2. The slitter according to claim 1, wherein said second spacer is disposed in contact with a side end surface of each ring-shaped receiving blade opposite to the blade portion side. 3. The second spacer comprises a pair of semi-circular bodies forming a ring by connecting both ends of each other with a screw member, and the second spacer is provided with an air shaft sandwiched between the two semi-circular bodies. 3. The air shaft according to claim 1, wherein said air shaft is tightened and fixed.
The slitter described in 1.