JPH0885651A - Winding shaft for double cutting winder - Google Patents

Abstract

PURPOSE: To make the winding of a sheet piece, after cutting a long sheet double, accurately performable in simple constitution. CONSTITUTION: This is a winding shaft for a double cutting winder, winding two sheet pieces cut in the longitudinal direction on the same shaft via a core. In this constitution, a driving disk 6 being clamped to a long turning shaft 2 and having plural pieces of fitting holes in the circumferential direction, and a differential gear 3 consisting of a rolling piece 7 being projected from both sides of this driving disk and attached to the fitting holes are set up in an intermediate position of this turning shaft 2 being driven and rotated by a motor. In addition, a winding cylinder 4 being set up at both side of this differential gear and lockable together with the core is installed in the turning shaft as being pressed to the rolling piece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a take-up shaft for a two-take-up take-up winder, which has a simple structure and is capable of accurately taking up a sheet piece after two long sheets have been cut.

[0002]

2. Description of the Related Art When a long sheet is cut in the longitudinal direction to form two sheet pieces, each of the cut sheet pieces is often wound around a winding core.

When the respective sheet pieces are wound, the tensions acting on the respective sheet pieces are different, so that, for example, as shown in FIG. 1, two split shafts a and a each having one end rotatably supported at an intermediate position. The winding shafts c are connected to each other via bearings b, b so as to be relatively displaceable to form a winding shaft c, and the respective split shafts a, a are driven by two motors m, m provided individually.

[0004]

In the winding shaft c thus formed, the two split shafts a and a are connected to each other at a position distant from the bearing portion, so that the connecting portion causes a decrease in strength. In addition, since the two motors m, m are required, the cost is increased.

Further, as shown in FIG. 9, two take-up cylinders f, f around which a sheet piece is wound around a long integral rotary shaft e to which a motor is connected.
There is also proposed a method of externally fitting the clutch via the friction clutches g, g. However, in this structure, when a difference in tension occurs between the two sheet pieces h to be wound up, the tension must be adjusted for each sheet piece. For example, as shown in FIG. For each sheet piece h, h with the shaft k, something like adjusting drums n1, n2 capable of individually applying tensions P1, P2 must be provided,
Therefore, the structure of the winder and the control for equalizing the tension become complicated. Moreover, when the tension is 5 kg or less, the control becomes unstable and the above problems have not been completely solved.

According to the present invention, a differential gear is provided at an intermediate portion of a rotary shaft driven by a prime mover, and two winding cylinders for winding each sheet around the differential gear are pushed toward a rolling element of the differential gear. Basically, the two sheet pieces can be evenly wound with a simple structure, and the above problems can be solved.
The purpose is to provide a take-up shaft for a take-up winder.

[0007]

DISCLOSURE OF THE INVENTION The present invention is a winding shaft for a two-winding winding machine that winds two continuous sheet pieces cut in the longitudinal direction on the same axis via a winding core. Drive, which has a plurality of fitting holes in the circumferential direction, is fixed to the longitudinal shaft of a long rotary shaft that is detachably supported at its both ends and is driven by a prime mover to rotate. A differential device including a disc and a rolling piece protruding from both side surfaces of the drive disc and attached to the fitting hole is disposed, and the rotary shaft is disposed on both sides of the differential device. A winding shaft for a two-winding winder, in which a winding cylinder that can be fixed to the winding core is pressed against the rolling piece and arranged.

Further, it is preferable that the rolling piece is a granular material selected from a sphere, a roller and a tapered roller.

[0009]

With the above construction, each sheet piece can be wound on the same axis and at the same time.

Even when a tension difference occurs between the sheet pieces during winding, rolling of the rolling pieces causes a relative peripheral speed difference between the two winding cylinders. The tension between the sheet pieces can be equalized.

As a result, two sheet pieces can be simultaneously wound with a uniform tension by one prime mover engaging the rotary shaft, and the prime mover can be saved as compared with the conventional structure shown in FIG. Further, as compared with the structure shown in FIG. 9, the control is simpler and the winding can be performed with a low tension, so that the two sheet pieces can be accurately wound with the simple structure, and the cost of the apparatus can be further improved. It also helps reduce. Furthermore, the winding shaft having the configuration of the present invention can be mounted on a single-roll winding machine that winds a single ply piece, and the application of the winding machine can be further expanded.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an outline of a 2-cut winding machine N, in which two sheet pieces P, P formed by cutting a wide and long sheet S in a longitudinal direction by a cutter K are wound on the same axis. A winding shaft 1 for a two-winding winding machine (hereinafter referred to as winding shaft 1) for winding via C is provided.

As shown in FIG. 2, the take-up shaft 1 includes a long rotary shaft 2, a differential unit 3 which surrounds the rotary shaft 2 at an intermediate position in the lengthwise direction, and both sides of the differential unit 3. A pair of winding cylinders 4 and 4 is arranged so as to surround the rotary shaft 2.

The rotary shaft 2 is rotatably supported at its both ends by bearings 21 and 21, and is formed as a hollow shaft in this embodiment. The rotating shaft 2 is releasably engaged with an output shaft of a prime mover M such as a reduction motor through a clutch or the like.

As shown in FIGS. 4 and 5, the differential unit 3 is a circular fitting hole which is fixed to the rotary shaft 2 and arranged in a plurality of annular shapes in the circumferential direction around the axis of the rotary shaft 2. .. and a rolling disc 7 which is rotatably fitted in each of the mounting holes 5 with a small gap. In the present embodiment, the rolling piece 7 is formed as a sphere 10 made of steel, and the sphere 10 has side surfaces 6a on both sides of the drive disc 6.
6a is attached to the fitting hole 5 so as to project therefrom.

In the present embodiment, the winding cylinder 4 is the rotary shaft 2
An inner cylinder 23 which is fitted with a space between the inner cylinder 23 and the inner cylinder 23 and is arranged with a first gap G1 between the inner cylinder 23 and the inner cylinder 23, and is made of an elastic material such as rubber. Intermediate tube 24 formed
Further, the intermediate cylinder 24 is provided with an outer cylinder 25 which is fitted on the intermediate cylinder 24 with a second gap G2.

These inner cylinder 23, intermediate cylinder 24, and outer cylinder 25
Are integrally fixed at the ends of the bearing 21 side and the differential unit 3 side, respectively. Further, an abutment piece 26 having an abutment surface 26a that abuts the rolling piece 7 of the differential gear 3 is connected to the end portion of the outer cylinder 25 on the differential three gear side so as to be rotatable together.

The winding cylinder 4 thus formed is rotatably supported on the rotary shaft 2 by bearings 27 and 29 at both ends thereof. Further, in this embodiment, the first gap G1 is electrically connected to the air intake port 31 which communicates with an external high pressure air source (not shown) through the air passage 30.

Abutting pieces 26, 2 on both sides sandwiching the rolling piece 7
6 is a pair of locking pieces 33A, 33 fixed to the rotary shaft 2.
B prevents the contact pieces 26, 26 from moving in the rotation axis direction, and thrusts the rotation shaft 2 and the take-up tube 4 between the locking piece 33 and the contact piece 26 so as to be relatively rotatable. Bearing 3
2 is interposed.

A biasing spring 34 for pressing the two contact pieces 26, 26 toward the rolling piece 7 is provided on either one of the pair of locking pieces 33A, 33B.

The outer cylinder 25 is provided with a plurality of elongated holes 36, ... As shown in FIG. 6, the intermediate cylinder 24 has a key lug 40 provided with a projecting piece 39 projecting toward the elongated hole 36 on the outer peripheral surface of a base piece 37 fixed to the outer peripheral surface thereof.
Will be distributed to. By supplying high-pressure air to the first gap G1, the pressure causes the intermediate cylinder 24 to expand in diameter, and the outward diameter 39a of the protrusion 39 projects from the outer peripheral surface 25a of the outer cylinder 25 due to the expansion. , A winding core C externally inserted on the winding shaft 4
To hold. Further, by reducing the air pressure in the first gap G1, the outward surface 39a is inserted from the outer peripheral surface 25a of the outer cylinder 25, and the winding core C is in a loosely fitted state.

However, by feeding air into the first gap G1, the diameter of the intermediate cylinder 24 is expanded, the core C is gripped by the key lug 40, and the prime mover M is driven to rotate the rotary shaft 2.

The drive disc 6 of the differential 3 rotates as the rotary shaft 2 rotates, and the rolling piece 7 mounted in the fitting hole 5 revolves together with the drive disc 6. On the other hand, the contact pieces 26 of the winding tubes 4 and 4 arranged on both sides of the rolling piece 7 are pressed toward the rolling piece by the urging spring 34, and by the pressing, the winding tubes 4 on both sides are pressed. 4 rotates at the same number of rotations as the rotating shaft 2.
Therefore, the two sheet pieces P, P cut from the sheet S
Will be wound via the core C at the same speed and on the same axis.

At the time of the winding, a difference occurs in the winding torque acting on the two winding cylinders 4 and 4 due to a slack in one of the two sheet pieces P, P, and the rotational speeds of the two are different. When it becomes equal, the rolling piece 7 of the differential device 3
Is rotated in the axial direction of the rotary shaft 2 at a peripheral speed corresponding to the rotational speed difference between the winding cylinders 4 and 4, and the rotation is corrected so that the rotation speeds of the two winding cylinders 4 and 4 are equal. To do. In this way, the differential unit 3 functions as a differential mechanism that constantly corrects the rotation speed between the two winding cylinders 4 and 4.

FIG. 8 shows another mode of the differential unit 3A using the tapered piece roller 11 as the rolling piece. Tapered roller 11
Is formed as a tapered roller that can rotate on a plane orthogonal to the axis of the rotary shaft 2 as a rotation center axis and that expands radially outward of the rotary shaft 2. Therefore, the contact surfaces 26b, 26b of the winding cylinders 4, 4 arranged on both sides of the differential 3A are formed as conical surfaces inclined at the same angle as the outer peripheral surface of the tapered roller 12.

Further, if the width of the roller can be made short and small, it can be formed as a straight cylindrical roller having a uniform roller diameter. In this way, the rolling piece can be formed by a granular body selected from a sphere, a roller, and a tapered roller, and further, instead of a spring that biases the two winding cylinders toward the rolling piece, A hydraulic cylinder or a pneumatic cylinder may be used, and the present invention can be modified into various modes.

[0027]

As described above, the winding shaft for two-winding winding of the present invention, as described above, winds the sheet piece on the rolling piece of the differential gear fixed at the intermediate position of the rotating shaft. Since the main idea is to press and arrange the take-up cylinder, even if there is a difference in tension between the sheet pieces, the rolling piece rotates and the peripheral speed between the two take-up tubes is always equal. Can be held at. Therefore, two sheet pieces can be wound by one prime mover, and the structure is simpler and easier to control than the conventional one, and the sheet pieces can be wound with a low tension. It also helps improve the quality of. In addition, it can be easily attached to a single-roll winder that winds a single ply piece, and the availability of the winder can be increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outline of a winding device for two-winding winding using the winding shaft of the present invention.

FIG. 2 is a front view showing an embodiment of the present invention.

FIG. 3 is an enlarged sectional view showing one end portion thereof.

FIG. 4 is an enlarged sectional view showing a central portion thereof.

FIG. 5 is a sectional view taken along line XX of FIG.

FIG. 6 is a sectional view taken along the line YY.

FIG. 7 is a cross-sectional view showing the operation of the differential device.

FIG. 8 is a cross-sectional view showing another mode of the differential device.

FIG. 9 is a partial cross-sectional view showing a conventional technique.

FIG. 10 is a perspective view showing an apparatus using the shaft.

FIG. 11 is a partial cross-sectional front view showing a conventional technique.

[Explanation of symbols]

 2 Rotating shafts 3 and 3A Differential device 4 Winding cylinder 5 Fitting hole 6 Driving disk 6a Side surface 7 Rolling piece 10 Ball 12 Tapered roller C Core M Core core P Sheet piece

[Procedure amendment]

[Submission date] December 27, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

[Title of the Invention] winding shaft for 2 Court up winder

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

Claims (2)

[Claims] 1. A take-up shaft for a two-take-up take-up winder, which winds two continuous sheet pieces cut in the longitudinal direction on the same axis via a winding core, the both ends of which are detachable. A drive disc, which is fixed to this rotation shaft and has a plurality of fitting holes in the circumferential direction, at an intermediate position in the length direction of a long rotation shaft which is supported and driven by a prime mover, and this drive disc. Of the windings which are arranged on both sides of the differential and which can be fixed to the winding core, are arranged on the rotating shaft, the differential being formed by rolling pieces protruding from both side surfaces of the rolling piece and attached to the fitting holes. A winding shaft for a two-winding winder, in which a winding cylinder is pressed against the rolling piece and arranged. 2. The winding shaft for a two-winding winder according to claim 1, wherein the rolling piece is a granular material selected from a sphere, a roller, and a tapered roller.