JPS59102763A - Web butt joining apparatus - Google Patents

Abstract

PURPOSE:To prevent buckling deformation of a succeeding web after cutting a web connecting end by disposing buckling preventing plates capable of freely moving across a running path above guide plates for guiding a web along a running path. CONSTITUTION:In the above apparatus, a succeeding web B is first drawn out by vacuum pressure of a draw-out machine 6. When the drawing speed concides with the running speed of a preceding web A, both webs A, B are cut at the same time by rotation of cutting drums 8A, 8B, and adhesive tapes T, T are put on the upper and lower surfaces of respective butt ends by the rotation of joining drums 9A, 9B. In this arrangement, two pairs of buckling preventing plates 12A, 12B are disposed in such a manner as to advance and retreat laterally to and from a running path 5 with a little space H from the first and second guide plates 10, 11. The respective buckling preventing plates 12A, 13A are advanced into the running path 5 by the operation of air cylinders 14A, 15A after cutting webs A, B to prevent buckling deformation of the webs.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a web butt splicing device used in various web processing devices.

Generally, long sheets of paper, synthetic resin sheets, metal foil, etc.-1-1
^1 In production equipment using a strip '#A (hereinafter collectively referred to as a web), it is often necessary to process a new web without joining it to the rear end of the preceding web that is currently being processed. In such cases, web butt joint mounting as shown in FIGS. 1 and 2 has conventionally been used.

That is, this web butt joint @ position is the preceding web original volume A.
and a rotating arm 1 capable of supporting the subsequent web original roll B0. As shown in FIG. 2, the leading web A is moved at a constant speed through a running path 5 through guide rollers 8 and 4 arranged along the lower part of a leading web removing machine 2, which will be described later. Further, when the trailing web B is joined to the leading web A, it is pulled out into the running path 5 by the perforated belt 7 of the trailing web puller 6 located below the leading web removing machine 2, and synchronized with the leading web A. Speed [IC speed is controlled.

Said run! Above and below 85 are a pair of cutting drums 8A and 8, which are rotated in the directions of the arrows at speeds synchronized with the preceding web A and the following web B, respectively, when joining the webs.
B and a pair of bonding drums 9A, 9B are located there. Each cutting drum 8A, 8B has two cutting blades 8a, 8b, and the leading web A and the trailing web B are simultaneously cut by these cutting blades 8a, 8B. In addition, the splicing drums 9A and 9B are equipped with tape stands 9a and 9a that can hold splicing tapes T under vacuum pressure, and when the butt ends of the webs A and B pass, these splice tapes T are attached to the upper and lower surfaces of the butt ends of the webs A and B. It is pasted. It should be noted that between the connecting web drawing machine 6 and the cutting drum 8B as well as between the cutting drum 8B
and the bonding drum 9B, a first. Second guide plates 10 and 11 are positioned.

Since the above-described web butt splicing device has the above structure, when joining the preceding web A and the succeeding web B, the vacuum pressure of the succeeding web puller 6 pulls the succeeding web from the succeeding web former roll B machine. B is pulled out onto the guide plate lO of the web I, and the leading end of the trailing web B is wound around the cutting drum 8B, and the peripheral surface of the cutting drum 8B and the second guide plate 11
It hangs downward from between the tips of the. Thereafter, when the speed I of the following web B matches the traveling speed of the preceding web A, the cutting drums 8A, 8B and the joining drums 9A, 9B are rotated, and the cutting blades 8a of the cutting drums 8A, 8B are rotated.

The leading web A and the trailing web B are simultaneously cut by the leading web A and the trailing web B, and the trailing edge of the leading web A is pulled into the leading web removing machine 2. Therefore, the abutting ends of both webs advance toward the joining drums 9A, 9B along the second guide plate 11, and the joining tapes T, T are applied to the upper F surface to complete the joining.

However, when trying to process a thin and weak web in a web butting and sliding device with such a structure,
Connection errors may occur. That is, since a weak web buckles with a small force and bends easily, the leading end of the trailing web B will be in the second position after being cut by the cutting drums 8A and 8B.
When it comes into contact with the guide plate 11 as shown in the figure, buckling occurs as shown in the figure, and the gap between the trailing edge of the leading web A and the tip of the trailing web B opens, causing a joining error. Such a joining error would result in a serious accident because it would mean the subsequent production equipment would have to stop operating.

In view of the above-mentioned conventional web butt splicing apparatus, the present invention proposes a web butt splicing apparatus that does not cause joining errors even when thin and weak webs are used.

Embodiments of the present invention will now be described in detail with reference to FIGS. 8 and 4.

8 and 4 showing an embodiment of the present invention are a plan view and a cross section corresponding to FIGS. 1 and 2, respectively, and the same reference numerals are given to the same structural parts as in FIGS. 1 and 2. It is.

The characteristics of the present invention are as follows. The first guide plate 10,1.1 is kept at a slight distance H from the second guide plate 10,1.1. Second guide board 10,1
Two pairs of anti-buckling plates 12A provided above 1.

12B and 18A, 18B. That is, these anti-buckling plates 121A, 12B and 18A, 18
B is a full pressure cylinder device l 14A, 14B and 1
5A and 16B extend onto the running path 5 after cutting the leading web A and the trailing web B, thereby limiting the buckling deformation of the trailing web B. These anti-buckling plates 12A and 12B
and 18A.

In order to reduce the frictional resistance against the following web B as much as possible, it is preferable that the web 18B be constructed of a corrugated plate or a roller conveyor plate. In addition, the guide plates 10 and 11 and the buckling prevention plate 12A,
12] The distance H between 3 and 18A and 18B is
In the illustrated design example, good results were obtained with 1 mm, but the same spacing may be within the range of web thickness + α++n (a distance within which the web is not restrained. Also, the width of the buckling prevention plate is In this example, 100 mm was used, but it may be selected as appropriate depending on the web material, thickness, etc.

Since the device of the embodiment has the above-described structure, the buckling prevention plate 12A is first cut after cutting by the cutting blades 8a, 81).
, 12B, and then the buckling prevention plate 18A.

IBB was invaded one after another in run #i5. For this reason,
Even if the weak and thin trailing web B undergoes buckling deformation due to contact with the guide plates 10 and 11, this buckling deformation t is limited by the buckling prevention plates 12A, 12B or 18A, IIIB. There is no gap between the butt ends of the leading web A and the trailing web B. Therefore, the joining tape T
, T are reliably affixed to the surfaces of the abutting ends of the preceding web A and the following web B, thereby eliminating the occurrence of joining errors.

After all, according to the present invention, weak and thin webs can be reliably joined simply by providing an extrusion-resistant buckling prevention plate on the guide plate.

[Brief explanation of the drawing]

11th! 2nd! I is a plan view of a conventional web butt splicing device, FIG. 2 is a sectional view taken along the line U-If in FIG. 1, the 81st side is a plan view corresponding to FIG. The figure is a second portrait cross-sectional view of the web butt joint device. A... Optical web, B... Rear tightening web, T... Joining tape, 5... Running path, 8A, 8B... Cutting drum, 9A, 9B... Joining drum, 12A, 12B, 1
8A, 18B...Buckling prevention plate, 14A, 14B, 15
A, 15B...9 atmosphere cylinder device.

Claims (1)

[Claims] ■) The rear end of the leading web moving on the running path and the front end of the trailing web are overlapped and cut by a pair of cutting drums having cutting blades, and the abutting ends of both webs that are moved in a butt state are cut by the above-mentioned cutting. In a web butt splicing device that joins webs using a pair of welding drums located behind the drums, a seat on the opposite bank that moves in the transverse direction of the travel path is placed on top of a guide plate that guides the web by being placed along the travel path. A web butt splicing device that prevents buckling deformation of a subsequent web by positioning an anti-buckling plate and allowing the anti-buckling plate to extend into a running path after cutting the web.