JPS6296249A - Takeup core chuck for slitter - Google Patents

Abstract

PURPOSE:To make a traveling stroke of a pressing member and takeup core axial width so as to be smaller as well as to make a narrow strip sheetlike material windable, by holding a takeup core with pressing force produced by elastic deformation of a ringlike rubber body. CONSTITUTION:An empty takeup core 10 is placed on a core receiver, a core keeper 40 is projected out, positioning it in an axial direction A, and a takeup core chuck 11 is inserted into the takeup core 10. Prior to insertion, a ringlike rubber body 32 receives no pinching pressure of pressing surfaces 16 and 32 and its elastic deformation is released so that there is a clearance between an inner diameter of the takeup core 10 and the rubber body, thus the takeup core chuck is insertable. When air pressure in an air cylinder chamber 26 is removed after the insertion is over, a piston 24 and a pressing member 30 are moved to the side of a driving shaft 17 by dint of energizing force of a spring 27, whereby the ringlike rubber body 32 is held, by pressure between just out onto an inner circumferentail surface of the takeup core 10 with its elastic deformation, thereby holding it. Therefore, a traveling stroke and width of the takeup core 10 both can be made smaller, thus a narrow strip sheetlike material is windable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a winding core chuck for holding a winding core of a slitter for sheet-like materials.

[Prior Art] A slitter that cuts a sheet-like material (for example, a plastic film, plastic sheet, paper, etc.) from a wide raw material into a plurality of strips of narrow-width sheet-like material and winds them up.
The cut belt-like sheet materials are respectively wound around corresponding winding cores. The winding core is usually capable of transmitting rotational driving force and has an attachment/detachment function for rotational driving and for removing the winding core that has been equipped with an empty winding core and wound up a sheet material for a predetermined length. The winding core is held in a chuck. Since the outer peripheral surface of the winding core is the part where the sheet-like material is wound, a winding core chuck is used to avoid interference with the winding sheet-like material and to prevent damage to the outer peripheral surface of the winding core. It is desirable that the structure is such that the winding core is held from the inner peripheral surface side.

As a winding core chuck that satisfies such a structure, as shown in FIGS.
The arc-shaped piece 2 is moved in the radial direction of the winding core chuck 1, and the winding core 3 is moved on the outer peripheral surface of the arc-shaped piece 2.
A structure is known in which the inner circumferential surface of the holder is pressed and held. As a mechanism for moving the arc-shaped piece 2, for example, a support member 5 having a tapered surface 4 and a suppressing member 6 for moving the arc-shaped piece 2 in the winding core axial direction A are provided, and the arc-shaped piece 2 is moved along the tapered surface. 4 is known, in which the arcuate piece 2 is moved in the direction of the inner peripheral surface of the winding core 3 by the radial angle component of the tapered surface 4.

[Problems to be Solved by the Invention] However, the chuck structure using split pieces as described above has the following problems.

First, in the structure shown in Fig. 8, the arc-shaped piece 2
In order to move the required amount in the radial direction, the stroke on the tapered surface 4 and the stroke of the pressing member 6 must be expected to be considerably large, and therefore the width of the winding core chuck 1 in the axial direction A of the winding core must be large to some extent. I have no choice but to do so. In the sheet-like material slitter, as shown in FIGS. 10 and 11, the cut sheet-like material 7 is wound around winding cores 3 arranged in a staggered manner in the winding section. The winding core chuck 1 is provided on the winding arm 8 and is retracted to the winding arm 8 side when the winding core 3 is attached or detached.
must be set in a position that allows for easy installation and removal. Therefore, when the width of the winding core chuck 1 increases, a problem arises in that the adjacent winding arms 8 interfere with each other, making it impossible to slit the narrow band-like sheet material 7. Furthermore, as the width of the winding core chuck 1 increases, the movement stroke required for the winding core chuck for attaching and detaching the winding core 3 becomes larger, and the winding core 3 becomes larger when the winding core 3 is removed. There is also the problem that troubles such as getting caught in the chuck 1 are more likely to occur.

In addition, in order to prevent eccentric rotation of the winding core 3, the winding core 3 needs to be accurately centered and held in the winding core chuck 1. Since there are many sliding parts, there is a high probability that each arcuate piece 2 will not move in the radial direction in accurate synchronization, and there is a possibility that the winding core 3 will not be accurately centered. Furthermore, if each arcuate piece 2 does not expand sufficiently in the radial direction, the winding core 3 may not be held uniformly from the inner peripheral surface, and the rotational driving force from the winding core chuck 1 to the winding core 3 is reduced. There is a problem that the transmission may not be carried out sufficiently and slip may occur during this time.

Furthermore, since the split piece type chit-tock structure has many moving parts, the structure is generally quite complex, and in addition to the problem of increased size as described above, there are also problems such as difficulty in maintenance and high manufacturing cost.

In order to solve the various problems of the split-piece type chuck structure as described above, the present invention satisfies the function of holding the winding core from the inner circumferential surface side, while reducing the axial width of the winding core. and to provide a structure of a winding core chuck in which the winding core is accurately centered, the inner circumferential surface of the winding core is held with uniform force over the entire circumference, and sufficient rotational driving force can be easily transmitted. purpose.

[Means for Solving the Problems] A winding core chuck for a slitter according to the present invention that meets this purpose has a support that is inserted into the winding core from the end face side of the winding core for winding a sheet-like material and has a pressing surface. a pressing member that is provided on the leading end side of the supporting member in the insertion direction, is moved in the axial direction of the winding core with respect to the supporting member, and has a pressing surface that faces the pressing surface of the supporting member; a rotation center axis of the support member that is interposed between a pressing surface and a pressing surface of the suppressing member, and is pinched between the pressing surfaces by the movement of the pressing member and protrudes toward the inner circumferential surface of the winding core; It consists of a concentric ring-shaped rubber body, and supports both ends of the winding core.

"Function" In the winding core chuck configured in this way, the outer circumferential surface of the ring-shaped rubber body that is held between the supporting member and the pressing member and projects radially outward is pressed against the inner circumferential surface of the winding core, This pressing force holds the winding core from the inner peripheral surface side.

Since the ring-shaped rubber body is only elastically deformed so that its outer circumferential surface extends in the radial direction by being clamped, it does not substantially move in the axial direction of the winding core with respect to the support member. Further, since the pressing member is only required to make a stroke necessary to elastically deform the ring-shaped rubber body by a predetermined amount, a small stroke may be sufficient. Therefore, the width of the winding core chuck in the axial direction of the winding core can be smaller than that shown in FIG. 4, in which a considerably large stroke is required for each part.

In addition, since the radial protrusion of the outer circumferential surface of the ring-shaped rubber body is due to elastic deformation of the ring-shaped rubber body, malfunction cannot be considered as a factor, and moreover, the ring-shaped rubber body is pinched between the pressing surfaces. Therefore, the radial extension is uniformly performed over the entire outer peripheral surface of the ring-shaped rubber body. Therefore, the winding core, which is held by the uniform protrusion of the ring-shaped rubber body concentric with the support member, is accurately rented to the support member, and is also held with a uniform predetermined holding force over the entire inner peripheral surface. be done.

[Embodiments] Preferred embodiments of the present invention will be described below with reference to the drawings.

1 to 6 show a winding core assembly of a slitter according to an embodiment of the present invention. In the figure, 10
indicates a winding core made of a cylindrical body, and a belt-like sheet material (not shown) slit to a predetermined width is formed on the outer peripheral surface of the winding core.
is wound up. Reference numeral 11 indicates the entire winding core chuck, and the winding core chuck 11 is supported by a cylinder 13 so as to be able to move in and out (move) in the winding core axial direction with respect to the winding arm 12.

The winding core chuck 11 is provided with a support member 14 that is inserted into the winding core 10 from the end surface side of the winding core 10 . The support member 14 is made of a disc-shaped member, and as shown in FIG. 1
An outer circumferential surface 50 concentric with the rotational center shaft 15 and an outer circumferential surface 51 into which the ring-shaped rubber body 32 is fitted are formed, having an appropriate gap δ from the inner surface of the ring. The outer peripheral surface 50 is severely damaged when a large amount of sheet material is wound around the winding core 10.
This is a guide for minimizing the partial deformation when the ring-shaped rubber body 32 is partially deformed and the concentricity is out of order.The gap δ is usually 0.1 to 1.0 mm, but preferably 0. A range of .1 to 0.311 is preferable. The support member 14 is
In this embodiment, it is constructed integrally with the drive shaft 17 (although it may be constructed separately). A pulley 1 is attached to the drive shaft 17.
8 are connected to each other, and rotational driving force is transmitted through the pulley 18 by appropriate means such as a timing belt. The drive shaft 17 is rotatably supported by bearings 20 and 21 built into the moving housing 19, and is movable in the axial direction A of the winding core as the moving housing 19 moves in the axial direction A of the winding core by the cylinder 13. It becomes.

A disk-shaped spring presser 23 is fixed by a bolt 22 to the distal end side of the support member 14 in the insertion direction into the winding core 10 . A piston 24 is interposed between the spring presser 23 and the support member 14. An O-ring 25 that seals between the outer circumference of the piston 24 and the inner circumferential surface of the support member 14 is fitted, and the piston 24 is supported movably in the axial direction A of the winding core with respect to the support member 14. There is. The space formed by the piston 24 and the support member 14 is configured as an air cylinder chamber 26. Also, piston 2
A spring 27 is interposed between the spring holder 23 and the spring holder 23 . In this embodiment, the spring 27 is made up of three disc springs stacked in series.
4 in the direction of the drive shaft 17.

The boss portion 28 of the piston 24 extends through the spring retainer 23, and a disk-shaped pressing member 30 is attached to the tip side of the boss portion 28 with a bolt 29.

The pressing member 30 is spaced apart from the spring presser 23, and has a pressing surface 31 opposite to the pressing surface 16 of the support member 14 formed on its outer peripheral side. This pressing surface 1
A ring-shaped rubber body 32 is interposed between 6 and 31. The ring-shaped rubber body 32 is fitted over the entire circumference of the outer peripheral surface of the support member 14 and is installed concentrically with the rotation center axis 15 of the support member 14 . Ring-shaped rubber body 32
By moving the pressing member 30 in the axial direction A of the winding core,
It is designed to be clamped between the pressing surfaces 16 and 31, and due to elastic deformation due to this clamping pressure, the outer circumferential surface side of the ring-shaped rubber body 32 protrudes toward the inner circumferential surface of the winding core 10 and comes into close contact with the inner circumferential surface. Moreover, it is configured to suppress the inner circumferential surface.

As shown in FIG. 5(a), the inner peripheral surface of the ring-shaped rubber body 32 is slightly recessed in anticipation of elastic deformation due to the clamping pressure. As shown in FIG. 5(B), when the ring-shaped rubber body 32 is pinched between the pressing surfaces 16 and 31 and elastically deformed, the inner circumferential surface side thereof is in close contact with the outer circumferential surface 51 of the support member 14. It has become. Considering the above operation, the material of this ring-shaped rubber body 32 is as follows:
It is elastic and has a high Poisson's ratio, making it rubbery.

Further, in this embodiment, as shown in FIG. 6, winding core jacks 11 are provided on both sides of the winding core 10.
This is a so-called double-sided chuck, and the winding core 10 is supported from both sides.

Furthermore, the shapes of the pressing surface and the ring-shaped rubber body are not limited to the shapes shown in FIGS. 5(a) and 5(b), but may be as shown in FIGS. It can also be a shape. In other words, the pressing surface 16a of the support member 14a and the pressing surface 31a of the pressing member 30a may be formed from surfaces oblique to the rotation center axis 15a, and the ring-shaped rubber body may also have a fan-shaped cross section. 32a, or 32b having a circular cross section.

Next, in this embodiment (the pushing member 30 is
The structure to be moved relative to 4 will be explained.

A cover 33 is attached to the movable housing 19 (see attached), and the cover 33 is connected to an appropriate air supply means (not shown), making it possible to control the supply of air.
communicates with an air chamber 35 between the bearings 20, 21 via an air passage 34 formed in the moving housing 19. The air chamber 35 is configured to be air-tightly sealed by O-rings 36, 37 and seal members 48, 48. An air passage 38 communicating from the air chamber 35 to the air cylinder seedling 26 is formed in the drive shaft 17 . Therefore, the movement of the piston 24 and the pressing member 30 can be controlled by the air pressure of the air sent to the air cylinder chamber 26 and the biasing force of the spring 27.

Note that 39 is an air cylinder, and 4o is a core holder provided at the tip of the rod 41. By protruding the core holder 40, the position of the winding core 10 in the axial direction A is set at a predetermined position when the winding core 1o is attached. It can be regulated.

Further, as shown in FIGS. 2 and 3, a core receiver 42 is provided on the lower surface side of the winding core 10. The core receiver (pull 42) is formed integrally with the screw 1 bend part 44 of the air cylinder 43, and the screw 1~n part 44 is biased by a spring 45 in the direction in which the core receiver (pull 42) is retracted. When air is supplied to the air cylinder chamber 47 from 46, the piston portion 44 and core receiver 42 are pushed out to the lower surface side of the winding core 10 against the biasing force of the spring 45, and the winding core is held in a predetermined position. It is now possible to receive it.

The operation of the embodiment device configured as described above will be explained below.

First, the entire winding core 11 can be easily moved in and out of the winding core 10 by controlling the operation of the double-acting cylinder 13 and moving it together with the movable housing 19.

The empty take-up core 10 is positioned at a substantially predetermined position by being placed on the core receiver 42-to, and is positioned in the axial direction A by protruding the core presser 40. In this state, the winding core chuck 11 is inserted into the winding core 10. However, before insertion, if J3 is in a state where the winding core 10 is not installed, air is supplied to the air cylinder chamber 26. From the means, a cover 33, an air passage 34, an air chamber 35,
Air pressure is supplied through the air passage 38, and the spring 2
7, the piston 24 and the suppressing member 30,
It is moved in a direction away from the support member 14 (in a direction opposite to the drive shaft 17). Therefore, when the suppressing member 30 is moved, the ring-shaped rubber body 32 is moved by the pressing surface 16.31.
The clamping pressure is released, and the elastic deformation of the ring-shaped rubber body 32 is released. In this state, there is a gap between the inner diameter of the winding core and the outer diameter of the ring-shaped rubber body 32, and the winding core chuck 11
can be inserted into the winding core 10.

When the insertion of the core chuck 11 is completed, the air supply from the air supply means is stopped, and the air pressure in the air cylinder chamber 26 is released. Then, the biasing force of the spring 27 causes the piston 24 and the pressing member 30 to move toward the drive shaft 17 again. Due to the movement of the suppressing portion <430, the ring-shaped rubber body 32 is pinched between the pressing surfaces 16 and 31, and is elastically deformed so that the outer circumferential surface side extends toward the inner circumferential surface side of the winding core 10. Due to this overhang, the winding core 10 is held by the ring-shaped rubber body 32 from the inner peripheral surface side. After this, core presser 40
, the core receiver 42 moves in the direction of the drive shaft 17 to complete the preparation for winding.

In the above-mentioned glue operation, it is not necessary to substantially move the ring-shaped rubber body 32 in the winding core axial direction A with respect to the support member 14, and the remaining movement of the pressing member 30 also causes the ring-shaped rubber body 32 to move. Since the width of the winding core chuck 11 in the axial direction A of the winding core can be small, the width of the winding core chuck 11 in the winding core axial direction A can be small because it is only necessary to avoid elastic deformation.

Further, the ring-shaped rubber body 32 extends concentrically with the support member 14 over the entire inner circumferential surface of the winding core 10, and is sandwiched and pressed between the pressing surfaces 16 and 31 that similarly extend over the entire circumference. Therefore, the outer circumferential surface is extended uniformly over the entire circumference due to elastic deformation. Therefore, the winding core 10 placed on the core receiver 42 is naturally and accurately centered with respect to the rotation center axis 15 of the support member 14 as the ring-shaped rubber body 32 extends further.

In addition, the ring-shaped rubber body 3 is accurately centered and
2 is also extended uniformly, so the ring-shaped rubber body 3
The holding force for the winding core 10 due to the outer peripheral surface of the winding core 10 suppressing the inner peripheral surface of the winding core 10 is also uniform over the entire circumference.

Therefore, sufficient driving force can be transmitted.

[Effects of the Invention] As is clear from the above description, the following effects can be obtained by sharpening the slitter using the take-up core chuck of the present invention.

First, since the winding core is held using the pressing force generated by the elastic deformation of the ring-shaped rubber body, the required movement stroke of the pressing member in the winding core chuck is small, and the winding The width of the core in the axial direction can be made significantly smaller than that of conventional split-piece chucks, making it possible to wind up narrow belt-like sheet materials.

In addition, since the width of the take-up core chuck can be small, the movement stroke of the entire take-up core chuck for attaching and detaching the take-up core is also small, which prevents trouble when attaching and detaching the take-up core, making it easier to attach and remove the take-up core. It can be made easier.

In addition, since the ring-shaped rubber body can be extended uniformly over the entire circumference, the take-up core can be accurately centered with respect to the rotation center axis of the take-up core chuck, and the inner peripheral surface of the take-up core can be Sufficient rotational drive transmission force can be obtained by uniformly suppressing and holding the entire circumference.

Furthermore, by utilizing the elastic deformation of the ring-shaped rubber body, the number of movable and sliding members can be significantly reduced compared to the conventional split one-piece chip structure, simplifying the structure and making maintenance easier. It is also possible to reduce production costs.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a winding core chuck of a slitter according to an embodiment of the present invention, Fig. 2 is a front view of the installation shown in Fig. 1, and Fig. 3 is taken along the line ■-■ in Fig. 2. FIG. 4 is a partially enlarged sectional view of the device shown in FIG. 1, FIGS. A schematic configuration diagram showing the state of the winding core chuck in the device shown in FIG. 1, FIGS. FIG. 9 is a front view of the split piece part of the device shown in FIG. 8, FIG. 10 is a perspective view of the winding part of a general slitter, and FIG.
The figure is a plan view of the apparatus of FIG. 10. 10... Winding core 11... Winding core chuck 12... Winding arm 13... Cylinder 14... Support member 15. ... Rotation center axis 16.31 ... Pressing surface 17 ... Drive shaft 19 ... Moving housing 23 ... Spring retainer 24 ... ... Piston 26 ... Air cylinder chamber 27 ... Spring 30 ... Pressing member 32 ... Ring-shaped rubber body 34, 38 ...・Air passage △・・・・・・Axial direction of winding core Fig. 2 Fig. 3 Fig. 4 Fig. 6

Claims (1)

[Claims] (1) A support member that is inserted into the winding core from the end face side of the winding core for winding the sheet-like material and has a pressing surface, and a support member that is provided at the tip end side of the support member in the insertion direction and that is used to wind the sheet-like material against the support member. a pressing member that is moved in the core axis direction and has a pressing surface that faces the pressing surface of the supporting member, and is interposed between the pressing surface of the supporting member and the pressing surface of the pressing member, and is interposed between the pressing surface of the supporting member and the pressing surface of the pressing member; a ring-shaped rubber body concentric with the rotation center axis of the support member, which is held between the pressing surfaces and protrudes toward the inner circumferential surface of the take-up core; Take core chuck.