JPH10279149A - Adjusting method of deviation of joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To join sheets within a minimum 'deviation' at any time by letting an edge of a tip of a stand-by sheet follow up an edge of a sheet which is running and is being reeled out and matching them automatically. SOLUTION: A controller 17 compares the results of measurement from a line sensor 11 of a sheet of a roll 1 which is being reeled out and a line sensor 12 of a sheet of a roll 1 which is in a stand-by condition at all times during the period when instructions for operation are given and sends an operation amount which is equivalent to a 'deviation' to a servo motor 15 when the 'deviation' occurs in the results of measurement. The servo motor 15 operates a barlike member 13 provided with a suction pad 14 in the direction of a right angle for the direction of running. Consequently, the feedback adjustment is done so that an edge of a tip of a sheet which is in a stand-by condition coincides with an edge of a sheet which is running to join them due to the 'deviation' within about 3 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper roll,
In a printing process using a sheet of plastic or the like, an automatic bag making process, etc., one roll-shaped sheet is completed, and in the process of automatically supplying the next new roll-shaped sheet,
This is related to improving the operability of automatic operation and the loss of sheet materials and related materials by minimizing the seam "shift" generated during automatic seaming.

[0002]

2. Description of the Related Art Conventionally, in order to reduce the "shift" of automatic splicing, conventionally, the fluctuation width of the finished dimension of a rolled sheet is controlled so as to be as small as possible, or the use of a roll having uneven winding is stopped. Experts are working carefully on a set of standby rolls

[0003]

The automatic splicing is an effective means for increasing the operation rate of the process because the material in the form of a roll can be replaced without stopping the line, but has the following problems. (1) Requires high finishing accuracy in the roll-like winding process (2) Requires skill and careful installation of the standby roll (3) Roll habit of the roll causes splicing "shift" (4) Uneven thickness of the sheet (including the difference in printing density) causes a seam "shift". (5) A bamboo-shaped unrolled product generated during transport and storage of the rolled sheet cannot be used. ( 6) The performance of automatic splicing is approximately 3
If it is not done within mm, the automatic correction device for the running line in the next process will perform a large correction operation in a short time, causing wrinkles. In the stacking process, the sheet is caught in the stacking process and the continuous feed sheet is cut or damaged.

[0004]

FIG. 1 shows an outline of an aspect of a typical method of an automatic splicing apparatus. A roll (1) is a roll in use, a roll (2) a roll (1) which is a standby roll. ) Passes through the splicing unit (3), passes through a combined accumulator (6) of a fixed roller (4) and a movable roller (5), and is pulled by a drive roller (7). When the end of the roll (1) sent out to the printing process or the bag making process is detected by the sensor (8), the guide roller (9) of the splicing unit (3) operates to pinch and stop the sheet being fed. At the same time, the guide roller (9), which cuts the stopped sheet by operating the cutter (10), also has a function of pressure bonding between the leading end of the waiting roll (2) and the stopped sheet. There is a method of bonding the running sheet and the waiting sheet provided by heat welding or attaching a double-sided adhesive tape to the leading end of the waiting sheet. The operation of the guide roller (9) and the cutter (10) is performed by an end sensor. (8) The sheet must be fed out at the same speed even during the splicing operation, which operates in a short time almost simultaneously with the detection output. The feeding tension of the feeding system is increased by stopping the feeding of the sheet. Therefore, the movable roller of the accumulator (6) is used. (5) approaches the fixed roller (4), and the sheet supply is continued without interruption. The seam is completed before the movable roll (5) comes into contact with the fixed roll (4),
The same operation is repeated without stopping the feeding by setting a new roll on the roll (1) while the feeding of the roll (2) is being performed. The edge of the sheet being fed out is

[PROBLEMS] As shown in the above, the movement of 3 mm or more is common, and the degree of “displacement” of the seam is determined by the stochastic property of the rolled sheet. There is no guarantee that the seam can always be joined within 3 mm. The present invention detects the moving point of the edge of the running sheet continuously, holds the vicinity of the leading end of the waiting sheet with a suction cup, and uses servo control to always The position of the edge of the waiting sheet is adjusted to the position of the running sheet edge, and the seam "shift" is adjusted to within about 3 mm to improve the problem caused by the "shift".

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 2, an embodiment of the present invention will be described with reference to the drawing roll side (1) and the standby roll side (2).
As close as possible, a liner (13) on which the line sensors (11) and (12) can be continuously measured with an accuracy of about 0.1 mm within a range of about 20 mm at the edge position has a suction cup ( The bar-shaped member (13) having at least three of the above-mentioned 14) can be linearly moved in the direction perpendicular to the running direction of the sheet by driving the servo motor (15), and is installed near the leading end of the standby sheet. Through the three-way solenoid valve (16), the vacuum source and the compressed air source are connected to sensors (11) and (12), a servo motor (15), a solenoid valve (16), and a terminal sensor (8). Is connected to the control device (17)

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A line sensor (11) for a sheet of a roll (1) during feeding, which will be described with reference to FIG. 2, continuously measures a change in an edge line of a running sheet and sends a signal to a controller (17). The line sensor (12) of the sheet of the roll (2) on the other hand while continuing to feed is a vacuum sucker (14) attached to the rod-shaped member (13), and continuously and continuously measures the edge of the movable and fixed sheet. , Control device (1
The control device (17) which continuously sends the measurement results from the two line sensors (11) and (12) constantly compares the measurement results from the two line sensors (11) and (12) during the operation instruction. The operation amount corresponding to "
The servo motor (15) which feeds the bar-shaped member (13) provided with the suction cup (14) in a direction perpendicular to the traveling direction, so that the edge of the leading edge of the waiting sheet is applied to the edge of the traveling sheet. An end sensor (8) that sets the standby roll (2) that performs feedback adjustment so as to match, treats the leading end of the sheet, and holds the leading end of the sheet to the suction cup (14) of the rod-shaped member (13) by the assistance of an operator. However, when the unwinding of the roll (1) is detected, the splicing unit (3) operates to perform the splicing operation. At this time, the solenoid valve (16) operates to operate the suction cup (1).
In 4), compressed air is supplied, and the leading end of the standby sheet, which has been held in a vacuum, is spliced with an extremely small "shift", and at the same time, becomes free in a short time, and the compressed air is switched to the running side. The feeding is to quickly disconnect the holding of the vacuum and to prevent the sheet that has started to run from contacting the suction cup and hindering the positioning.
A new roll is set on the roll (1) in the interval until the switched roll (2) ends, and the roll (2)
The end sensor (8 ') is also provided on the roll (2) side which has a swinging structure so that the rod-shaped member (13) and the suction cup (14) which perform the same assisting work as the end treatment of (1) can be used on both sides. When the prepared roll (2) is on the feeding side, when the roll (2) for reversing the master-slave relationship between the line sensor (11) and the line sensor (12) ends, the roll (1) is switched to the roll (1). Continuous operation becomes possible by repetition of alternate operation

[0007]

According to the present invention, the edge of the leading edge of a waiting sheet is fed out and automatically adjusted to the edge of a running sheet, so that splicing can be performed with an extremely small "shift" at any time. Can solve various problems

[Brief description of the drawings]

FIG. 1 Outline of a typical method of an automatic splicing apparatus

FIG. 2 is an embodiment of the present invention.

[Explanation of symbols]

1 roll (supply side) 2 rolls (standby side) 3 splicing unit 4 fixed roller 5 movable roller 6 accumulator 7 drive roller 8, 8 'end sensor 9 guide roller 10 cutter 11 line sensor (supply side) 12 line sensor (standby) 13) 13 bar-shaped member 14 suction cup 15 servo motor 16 solenoid valve 17 control device 18 piping

Claims (1)

[Claims] (1) Detecting the position of the running edge of the rolled sheet being fed (2) Holding the vicinity of the leading end of the rolled sheet which is waiting to be fed out next by a suction cup movable by a servomotor. 3) Detect the position of the edge of the sheet held by the suction cup. (4) Drive the servo motor so that the edge of the sheet on standby is within about 3 mm of the running edge of the sheet being fed, Adjust the gap in automatic splicing