JPH05178507A - Thin film body roll winding end detection method used in device connecting same roll - Google Patents

Abstract

PURPOSE:To minimize the overlapped connecting section of a thin film body by using a thin film body roll having a through-hole near the trailing end thereof as a roll, and judging that the roll is completely wound upon detection of the hole for controlling the connection of a standby thin film body roll. CONSTITUTION:In a thin film body roll 1 comprising a thin film body 2 such as a synthetic resin film or sheet wound around a core 3, a single through-hole is formed on a feed roll 1A as completely rolled at the time of supply, near a winding start section for the core 3 corresponding to the vicinity of a trailing end 2A, when the body 2 is wound around the core 3. On the other hand, a connecting device for the roll 1 is provided with a detection device 5 to detect the through-hole, comprising a light projection section 5A and a light receiving section 5B so arranged as to oppose each other via the feed passage of the body 2. The winding end of the roll 1A is detected by finding the hole with the device 5. This detected information is used as connection start timing information for starting a connecting process for a standby roll 1B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting the winding end of a thin film roll used in a thin film roll connecting device.
For details, connect a plurality of thin film rolls consisting of synthetic resin film or paper sheet wound on a core made of kraft paper etc. by a winder one after another and continue to post-treatment processes such as printing and surface treatment. The present invention relates to a method of detecting the end of winding of a thin film body roll during the supply.

[0002]

BACKGROUND OF THE INVENTION As a method for supplying a thin film roll when a plurality of thin film rolls are continuously and sequentially supplied to a post-treatment process, for example, Japanese Patent Laid-Open No. 63-212654, during supply and standby. In order to solve the so-called center drive system in which the thin film roll of FIG.
There are surface drive systems proposed in No. 8 and No. 3-75844.

In these connecting devices and connecting methods, in order to successively and continuously supply a plurality of thin film body rolls to the post-treatment step, the thin film body rolls being supplied (hereinafter, may be simply referred to as supply rolls in this specification). ) It is necessary to surely connect the starting end of the thin film roll on standby (also sometimes referred to as a waiting roll) to the rear end. Moreover, at the time of such connection, it is preferable that the overlapping portion of the thin film body, which is a connecting portion between the rear end portion of the supply roll and the start end portion of the standby roll, is as small as possible within a necessary and sufficient range for connection so that there is no waste. This is because the thin film body overlapping portion is a portion that is cut off and recovered / regenerated or discarded after the post-treatment process. Therefore, in order to make such a connection, it is extremely important to detect the winding end of the supply roll with high accuracy and start the connection operation based on the detection.

Conventionally, in order to detect the winding end of the supply roll, the winding diameter of the thin film roll is measured, and the winding end is presumably detected by the decrease of the winding diameter, or the winding length at the time of winding. When setting, the length measuring counter detects the end of winding from the length from the beginning of winding.

However, in the former detection by the winding diameter, it is necessary to secure a large safety margin because the error is large due to the nonuniformity of the thin film body thickness and the uneven winding, and in the latter detection by the length measuring counter, the thin film body is detected. Since the roll is usually wound long, the surplus portion becomes large. Therefore, these conventional detections have a drawback that the thin film body overlap portion at the time of connection increases.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an ideal connection in which the thin film overlapping portion, which is a connection portion between the trailing end portion of the supply roll and the starting end portion of the standby roll, is as small as necessary and sufficient for the connection. It is an object of the present invention to provide a method of detecting the end of winding of a thin film roll that enables the winding.

[0007]

The inventors of the present invention have made extensive studies to achieve the above object, and as a result, the present invention has been achieved.

That is, the method of detecting the winding end of the thin film body roll used in the thin film body roll connecting device according to the present invention is such that the thin film body roll connecting device is waiting at the rear end portion of the thin film body roll being supplied by the thin film body roll connecting device. By connecting the starting end of the thin film roll, in the case where a plurality of thin film rolls are sequentially supplied to the post-treatment step, a thin film roll having a through hole formed in the vicinity of the rear end is used. It is characterized in that the winding end of the thin film body roll being supplied is detected by detecting the through hole at the time of supply and is used as the connection start time information of the thin film body roll in the standby state.

In a preferred embodiment of the method for detecting the winding end of the thin film roll used in the thin film roll connecting device according to the present invention, the through holes are formed when the thin film is formed or when the thin film roll is wound. Is to be formed.

[0010]

According to the present invention, the through hole is formed at an arbitrary position from the rear end of the supply roll based on the length of the thin film overlapping portion required at the time of connection and the position of the detection means for detecting the through hole. The thin film roll is used. When the standby end of the standby roll is connected to the rear end of the supply roll by the connecting device, the winding end of the supply roll is detected by detecting the through hole. The standby roll is connected based on the detection. The detection is based on actual measurement, not the rough estimation based on the conventional prediction. Therefore, not only a connection with very few errors is possible, but also the lengths of the thin film body overlapping portions caused by a plurality of connections can be made uniform. Further, by changing the formation position of the through hole and the detection position of the through hole, it is possible to set the length of the thin film body overlapping portion to a desired length.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic explanatory side view showing an example of a detecting method of the present invention, and FIG. 2 is a partial plan view of a thin film body showing an example of a through hole forming position.

First, a thin film roll 1 will be described in which a plurality of films are sequentially connected by a connecting device to which the present invention is applied and are continuously supplied to a post-treatment process (not shown) such as printing or surface treatment.

The thin film roll 1 is a roll formed by winding a thin film 2 made of a synthetic resin film or a sheet or a paper sheet around a winding core 3 made of kraft paper or the like by a winding machine. When the thin film body 2 is wound around the winding core 3, the trailing end portion 2 of the supply roll 1A, which is the winding end at the time of supply,
A through hole 4 is formed near the winding start portion of the winding core 3 in the vicinity of A as shown in FIG. The ends (starting end and rear end) of the thin film roll 1 are cut obliquely,
This is because the end is cut by the cutting blade that moves in the width direction.

The through holes 4 are formed by simply heating, lasering, or the like at a desired position of the thin film body 2 during film formation or winding of the winding core 3.
It may be formed automatically or manually by a method such as punching, and its size depends on the detection performance of the detection device 5 described later, but a simple hole having a diameter of about 1 mm is sufficient. As an example of a method of automatically forming the through holes 4, one of the feed rollers that supplies the thin film body 2 to the winder is
There is a mode in which a roller having a protrusion protruding in synchronism with a thin film cutting machine or the like is formed, and the protrusion is protruded to form the through hole 4 when the through hole forming portion of the thin film 2 passes through the roller. ..

The formation position of the through hole 4 is not particularly limited in the width direction of the thin film body 2, but in the length direction, when the detection device 5 detects and connects the standby roll 1B, the supply roll 4 is supplied. A position where the thin film body overlapping portion, which is a connecting portion between the rear end portion 2A of 1A and the starting end portion 2B of the standby roll 1B, is as small as possible within a necessary and sufficient range for connection,
That is, it is preferably at a position where the detection device 5 detects when the thin film body 2 remains on the winding core 3 as little as possible. By forming the through hole 4 at such a position, the length of the thin film overlapping portion is set to be the minimum length of the overlapping portion, and the connecting position from the rear end portion 2A of the supply roll 1A to the starting end portion 2B of the standby roll 1B. Can be closer to. Therefore, it is possible to reduce the overlapping portion of the thin film body that is cut off after the post-treatment process and is collected / regenerated or discarded.

Regarding the connection device to which the present invention is applied, the present applicant has previously filed Japanese Patent Application Nos. 2-220588 and 3-75844.
In the surface drive system suitable for connection and supply of wide film proposed in No. 1 and the conventional center drive system, a detection device 5 for detecting the through hole 4 of the thin film roll 1 is added. .. In addition, in FIG.
In order to make it easier to understand the detection of the winding end of the supply roll 1A and the connection of the standby roll 1B, the supporting roller, drive roller, drive shaft, and other connecting devices are omitted. In addition, in FIG. 1, the positions of the respective constituent members are shown relative to each other, not to the absolute positions.

The detection device 5 is composed of a sensor of various known systems such as a CCD system, an electrode system, a laser system, etc. in addition to an extremely simple one such as a combination of an incandescent lamp projector and a line type image sensor. As shown in FIG. 3, the light projecting unit 5A and the light receiving unit 5B are arranged so as to sandwich the supply path of the thin film body 2 of the supply roll 1A.
The light is blocked by the thin film body 2 during the supply of. As the supply of the supply roll 1A progresses and the portion of the through hole 4 of the thin film body 2 approaches the optical path of the light projection, the interrupted light projection passes through the through hole 4 and is received by the light receiving portion 5B. Through hole 4
To detect. The detection of the through hole 4 detects the winding end of the supply roll 1A, and the detection information is used as the connection start time information to start the connection operation of the standby roll 1B. The arrangement position of the detection device 5 is preferably behind the standby roll 1B with respect to the supply direction.

In the present invention, the winding end of the supply roll 1A is detected by detecting the through hole 4 formed near the rear end 2A, but a mark is printed in place of the through hole 4. Then, an experiment was carried out by configuring so as to detect the mark or by applying a sticker and detecting the sticker. As a result of the experiment, in the case of the mark printing, the mark detection accuracy of the detection device is lowered due to the color and transparency of the thin film body, and further the printing paste depending on the material of the thin film body, and the standby roll is connected. There were times when it wasn't. Further, in the case of sticking the seal, the detection accuracy was about the same as in the case of detecting the through hole 4 of the present invention, but it was found that there is a problem of foreign matter mixing because the seal is a different material from the thin film body. It was

[0020]

According to the present invention, a thin film roll having a through hole formed in the vicinity of the rear end is used, and the winding end of the thin film roll being fed is detected by detecting the through hole at the time of feeding. Since the thin film body roll is connected by using the connection start time information of the thin film body roll that is detected and waiting, the thin film body overlapping portion that is the connection portion between the supply roll rear end and the standby roll start end Can be made as small as possible within the range necessary and sufficient for connection. Moreover, since the detection is based on actual measurement rather than the conventional rough estimation based on prediction, there is almost no error, and highly accurate connection is possible.

[Brief description of drawings]

FIG. 1 is a schematic explanatory side view showing an example of a detection method of the present invention.

FIG. 2 is a partial plan view of a thin film body showing an example of a through hole forming position.

[Explanation of Codes] 1 thin film roll 1A supply roll 1B standby roll 2 thin film 2A rear end 2B start end 3 winding core 4 through hole 5 detection device

Claims (2)

[Claims] 1. A thin film roll connecting device is connected to a trailing end of a thin film roll being supplied by a thin film roll connecting device, and a plurality of thin film rolls are successively processed in the post-treatment step. In the case of continuous supply to, the thin film roll having a through hole formed in the vicinity of the rear end is used, and the end of winding of the thin film roll being supplied is detected by detecting the through hole at the time of supply. A method for detecting the end of winding of a thin film roll used in a device for connecting the thin film roll, characterized in that the method is used for connection start time information of the thin film roll on standby. 2. The winding of the thin film roll used in the device for connecting the thin film roll according to claim 1, wherein the through holes are formed at the time of forming the thin film roll or winding the thin film roll. End detection method.