JPS582897B2 - Traveling cutting device for web winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and device for winding a long thin material (hereinafter referred to as a web), and more specifically, the present invention relates to a method and apparatus for winding a long thin material (hereinafter referred to as a web). The present invention relates to a web winding method and apparatus capable of winding a web onto an empty core.

Furthermore, the present invention relates to a new cutting device for that purpose.

Conventionally, devices that automatically wind a web being wound onto a new core without stopping its running are known, for example, from U.S. Pat. Nos. 2,620,993 and 2,973,158. It is being

U.S. Pat. No. 2,620,993 discloses an apparatus that cuts a web and blows air onto the tip of the cut web to automatically wind it onto a new core.

U.S. Pat. No. 2,973,158 discloses a winding device in which an adhesive tape is attached to the surface of a new core for winding the cut web end.

US Pat. No. 2,620,993 has a structure in which air is blown out when the web is cut, so the leading edge of the cut web cannot be reliably guided and the leading edge may wrinkle.

Moreover, the structure of the cutting device becomes complicated and expensive.

On the other hand, U.S. Pat. No. 2,973,158 uses a press roller to nip the web onto a new core, and at the same time cuts the web that has passed through the nip position of the press roller with a cutter. Similarly, the tip of the cut web is not smoothly guided to the surface of a new winding core, and has the disadvantage that the tip is easily wrinkled.

If the tip of the cut web becomes wrinkled, or if the cut surface is jagged due to poor cutting methods, winding failure may occur, or the web wound onto a new core may be concentric. There was a possibility that the web would not be wound up and the flatness of the web would be impaired.

In order to resolve such failures, it is necessary to smoothly guide the tip of the cut web onto the surface of the new core.

Therefore, an object of the present invention is to provide a web winding method that can smoothly guide the leading end of a cut web onto a new core surface.

A second object of the present invention is to carry out the method described above.
To provide a web winding device capable of solving problems such as winding wrinkles and winding failures.

Yet another object of the invention is to provide a web cutting device that is simple in construction.

In order to achieve the above object of the present invention, the web winding method of the present invention involves aligning the transferred web along the circumferential surface of the core for at least a half-circumference length of the core; At the point where the web is about to leave the circumferential surface, the web is cut from one end to the other end in the web width direction, and at the same time the tip of the cut web is guided along the circumferential surface of the core. Features.

Further, in order to carry out the above web winding method, the web winding device of the present invention comprises: a. a winding core accessible to the surface of the web to be transported; b. A web position regulating device that aligns the transported web along the circumferential surface of the winding core is disposed on the opposite side of the winding core with the web surface as a boundary, and presses the web against the winding core from the web supply side. , consisting of a first web regulating roller that forms a nip point, and a second web regulating roller that approaches from the core side during web winding and stands still at a position a certain distance away from the core. ,C. a traveling cutting device disposed between the winding core and the second web regulating roller, which traverses the surface of the web being transported; d. The present invention is characterized by comprising a guide plate that guides the tip of the cut web from the web cutting point to the nip point formed by the core and the first web regulating roller.

Further, the web traveling type cutting device used in the web winding device of the present invention has its cutting edge directed in the running direction and guides the web end surface to the cutter cutting edge, so that the cutting device is placed between the cutter and the web being transferred downstream from the cutter. One piece on the web surface is curved toward the newly wound core, and the other piece on the upstream side of the transfer web from the cutter is curved toward the side where the core does not exist. The supporting plate itself has a shape for guiding the tip of the cut web.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a perspective view of one embodiment of the invention.

3 is a new core for winding the web W; 1 and 2 are guide rollers for regulating the web position; 6 is a running cutting device installed between the core 3 and the guide roller 2; It consists of a cutter 8, a traveling rail 4, and a traveling drive device (not shown).

A notch 7' is provided at the tip of the web guide plate 7, and a cutter 8 is fixed to this part.

The upper and lower sides of the notch 7' are composed of two curved pieces 7b and 7c for smoothly guiding the web W to the cutter 8, and the curved pieces 7b and 7c are curved at an angle α.

The angle of the cut 7', that is, the attachment angle of the cutter, is adjusted to the web transport speed and the vector direction of the transport speed of the cutting device relative to the web width direction.

The web guiding plate 7 located behind the cutter 8 forms a web guiding surface 7a corresponding to the radius of curvature R of the winding core 3.

The radius of curvature R' of the web guiding surface 7a is set to be somewhat larger than the radius R of the winding core 3.

In FIG. 1, the cutting device 6 and the winding core 3 are shown separately for ease of understanding, but in reality, the center of curvature O of the web guiding surface 7a of the web guiding plate 7 is the central axis L of the winding core 3. They are set nearby, but of course they may match.

When the guide plate 7 approaches the side end surface of the web W, the cutter 8
The curved piece 7b, which is closer to the web winding side (downstream side of the transfer web) with the border between , is closer to the side where the winding core 3 is arranged, and the curved piece 7b is closer to the web supply side (upstream side of the transfer web), which is closer to the web W surface. The curved piece 7c is designed to bite into the side where the winding core 3 is not placed.

As is clear from the drawing, the cutter 8 is fixedly installed between the curved pieces 7b and 7c so as to intersect with the web guide plate 7, with its cutting edge facing the web side end surface.

The guide rollers 1 and 2 are rotatably supported by pivot pins 11 and 14 at the tips of swing arms 9 and 10 (see FIG. 3).

The first guide roller 1 is pressed against the core 3 from the web supply side and nips the web.

The second guide roller 2 approaches the core from the web winding side.

However, since the cutting device is interposed between the second guide roller 2 and the core 3, the second guide roller does not come into contact with the core 3 via the web W.

FIG. 2 shows a side view when the cutting device 6 cuts the web W.

FIG. 3 shows the swing arms 9, 10 of the guide rollers 1, 2.

The swinging arms 9 and 10 have pins 12 and 13 that serve as the center of rotation.
When not cutting the web, they stand by at the positions indicated by the dashed lines.

The figure shows a state in which the running web W swings so as to cover the outer periphery of the winding core 3.

The traveling cutting device 6 described above may be attached to the swing arm 10 slightly closer to the pin 13 than the guide roller 2.

Although a driving source for the swing arms 9 and 10 is not shown, an air cylinder or the like can be used.

Next, the operation of the present invention will be explained with reference to FIGS. 4A to 4C and FIG. 5.

FIGS. 4A to 4C show a state in which the web W is wound around the winding core X and is automatically changed to an empty winding core Y.

The dot-dotted circle is shown with the turret device omitted, and when the web 18 wound around the winding core X approaches a saturated state, approximately After turning 180 degrees, the empty winding core Y approaches the web W being transferred, and a motor (not shown) that drives the winding core Y is activated, so that the rotational speed of the winding core Y is slightly higher than the web traveling speed. It is controlled so that

The operation of this turret device is controlled by the winding web 18.
Use a thickness detector, etc.

This control means does not form the core of the present invention, and there is no need to specifically explain it.

Next, in order to start cutting the web, the first and second guide rollers 1 and 2 approach the web from the side opposite to the winding core Y, and swing so that they are in the position as shown in Figure 4, 8. Rock the arm.

It is preferable that the guide rollers 1 and 2 approach each other so that the web W covers more than half the circumference of the winding core 3.

The traveling cutting device 6 is operated in this arranged state.

a curved piece 7b that guides the transfer web to the cutting edge of the cutter 8;
7c is very effective in reliably guiding the web to the cutter edge even if the web surface is vibrating.

FIG. 5 shows a state in which the traveling cutting device 6 cuts into the web W from the right end of the web (this figure is different from the embodiment of the present invention shown in FIG. 1). Although the positional relationship is not the same, the cut-in state is thought to be easily understood).

The web guiding plate 7 approaches the surface of the winding core Y (winding core 3 in FIG. 1), runs in the axial direction of the winding core 3, and runs along between the curved pieces 7b and 7c forming the web entrance. The web side end surface invades.

The end surface of the web hits the cutter 8, and cutting starts from the end surface on the web side.

The leading end WE of the cut web at this time is guided toward the winding core 3 along the curved surface 7a of the web guiding plate 7 (see FIG. 2).

On the other hand, the rear end of the cut web which is not wound around the winding core 3 does not exist on the curved surface 7a side of the guide plate and is therefore transported as is.

The web tip WE cut in this way is smoothly guided close to the surface of the winding core 3, reaches the nip between the guide roller 1 and the winding core 3, and is strongly guided as it goes around the surface of the winding core 3. Can be wrapped.

In FIG. 5, θ is a vector direction determined by the running speed of the web and the running speed of the cutting device, and the upper part of the web guiding plate 7 has the same slope as this direction.

After the web is wound around the winding core 3 in this manner, the swinging arms 9 and 10 are activated again to return to their original state, and the web is wound up.

As explained above, the web winding device of the present invention includes a cutting device that can smoothly guide the cut end of the web being wound, so that the web can be wound around the core.
There are no winding failures or winding wrinkles, and the web can be wound without compromising its flatness.

Further, it has the advantage of being simpler in structure than a winding device having air blowing means.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a view showing the swinging mode of the swinging arms 9 and 10, and FIGS. FIG. 5 is an explanatory diagram for rewinding the web, and FIG. 5 shows a state diagram when the cutting device cuts into the end surface of the web. 1, 2... Guide roller, 3... Winding core, 4... Running rail, 6... Cutting device, 7... Web guide plate, 7a... Curved surface, 8 cutter.

Claims (1)

[Scope of Claims] 1. A web winding device capable of winding a web being wound around an empty core without stopping the transfer of the web onto an empty core, comprising: a. Winding core accessible to the web surface to be transported b. A web position regulating device for aligning the transported web along the circumferential surface of the winding core C. a traveling cutting device that traverses the surface of the web during transport, disposed between the winding core and the second web regulating roller; d. The traveling cutting device includes a guide plate that guides the leading end of the cut web from the web cutting point to the nip point formed by the core and the web position regulating roller, and the traveling cutting device has a cutting edge directed in the traveling direction;
In order to guide the web end face to the cutter cutting edge, a piece of the web on the downstream side of the cutter is curved in the direction of the newly wound core with the web surface as the boundary, and the piece on the downstream side of the transport web from the cutter is curved in the direction of the newly wound core. A web characterized in that one side on the side has a curved shape toward the side where the core is not present, and the support plate that supports the cutter itself has a curved shape for guiding the tip of the cut web. Traveling cutting device for winding device.