JP2005298162A - Splice device and splice method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To continue jointing sheets without stopping run of the sheets for improving production efficiency, while securely jointing the sheets to each other. <P>SOLUTION: A splice part 30 is provided close to a cutting part 20 downstream of it, and distance from a jointing position for the first and the second sheets 11L and 11R to a terminal end part of the first sheet 11L is minimized. An accumulation part 50 is provided, and while an upstream supply line is stopped for splice work, the sheet accumulated at the accumulation part 50 is supplied to the downstream side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a splicing device and a splicing method for a flexible sheet body such as paper, plastic film, metal foil and the like.

  In a sheet transport apparatus that transports and feeds a sheet wound in a roll, the sheet is continuously connected by joining the end of the sheet in use and the start of the unused sheet. A splicing device that can be conveyed is used.

  This splicing device has been devised in various ways to enable the sheet body to travel without being interrupted during the sheet splicing, so-called splicing work (see, for example, Patent Document 1).

  Further, in the conventional splicing device, the end of the sheet provided in the sheet supply line is detected, and when the end is detected, the used sheet and the unused sheet being conveyed are detected. Some join the body.

  However, in such a splicing device, the sheet member in use travels at the line conveyance speed. Therefore, when trying to join an unused sheet body that is stationary to the traveling sheet body, the joint location may be kinked, resulting in poor bonding. In order to eliminate the above-mentioned joining failure, there is a method of stopping the conveyance of the line. However, if the line is stopped for each splicing operation, the production efficiency is lowered.

  In addition, since the splicing device that detects the end of the sheet body performs the splicing work with a certain margin, the part where the sheet body overlaps from the joining point to the end is long, and the sheet body is efficiently Cannot be used.

  In addition, since the sheet body is used to the end, poor bonding may occur due to wrinkles at the end of the sheet body.

JP 2000-259591 A

  The present invention has been made in view of the above-described problems, and its purpose is to improve the production efficiency by allowing the sheet bodies to be joined without interrupting the running of the sheet bodies. Another object of the present invention is to provide a splicing device and a splicing method capable of reliably joining sheet bodies.

  The splicing device according to the present invention includes a first winding portion in which the first sheet body is wound in a roll shape, a second winding portion in which the second sheet body is wound in a roll shape, Each of the first and second winding parts is provided at a predetermined distance from the rotation shaft, and the remaining first and second sheet bodies wound around the first and second winding parts are provided. A remaining amount detecting unit for detecting the amount, a first cutter for cutting the first sheet body, and a supply line for the second sheet body provided in the supply line for the first sheet body. A cutting section having a second cutter for cutting the second sheet body, and the first sheet body provided on the downstream side in the vicinity of the cutting section and supplied from the first winding section; A splice part for joining the second sheet body supplied from the second winding part, and downstream of the splice part Provided, and a storage section for storing the one of the sheet member during use. And when the remaining amount detection unit detects that the remaining amount of the sheet wound around the winding unit in use has become a predetermined amount or less, the driving of the winding unit in use is stopped, The cutting section cuts the sheet body in use, and the splice section joins the cut sheet body to a sheet body wound around a spare winding section that is stopped driving. When the winding part and the second winding part stop driving, the sheet body accumulated in the accumulating part is supplied downstream.

  Further, the accumulating unit includes a fixed roller and a movable roller that is close to and away from the fixed roller, and any one of the sheet bodies in use alternately overlaps the fixed roller and the movable roller. You may be made to do.

  The splicing method according to the present invention selectively supplies the first sheet body wound around the first winding portion and the second sheet body wound around the second winding portion downstream. The step of detecting, the step of detecting whether the remaining amount of the sheet body wound around the winding section in use has become a predetermined amount or less, and the remaining amount of the sheet body in use has become a predetermined amount or less. A step of stopping the driving of the winding part in use, a step of cutting the sheet body in use after the driving of the winding part in use is stopped, and the cut sheet body The step of joining the sheet wound around the spare winding part whose driving is stopped, and when the first winding part and the second winding part are stopped driving, the storage part And supplying the sheet body accumulated in the downstream. Note that the step of joining the first sheet body and the second sheet body may be performed substantially simultaneously with the step of cutting the sheet body in use.

  According to the present invention, since the cutting portion and the splice portion are disposed at close positions, the distance from the joining portion of the sheet body to the terminal portion of the used sheet body can be minimized, It is possible to reduce the number of duplicated sheet bodies and reduce the number of defective products.

  In addition, since the accumulating section is provided, the sheet body is cut out by the cutting section upstream of the accumulating section, which is a splicing operation, and the two sheet bodies are joined by the splice section, and then sent out from the winding section. Even if the traveling of the sheet body is stopped, the sheet body accumulated in the accumulation unit is fed to the production line on the downstream side of the accumulation unit. Therefore, the time loss required for the splicing operation can be eliminated, and the traveling of the sheet member is stopped on the upstream side of the accumulation unit where the splicing operation is performed, so that the joining failure can be eliminated.

  Hereinafter, a splicing device to which the present invention is applied will be described with reference to the drawings.

  As shown in FIG. 1, the splicing device 10 includes a first winding portion 12L in which a first sheet body 11L is wound in a roll shape, and a second sheet body that serves as a spare for the first sheet body 11L. 11R is wound in a roll shape, the second winding portion 12R, the bracket portion 13 supporting the first and second winding portions 12L, 12R, and the first and second winding portions 12L, 12R. Drive for causing the remaining amount detection portions 14L and 14R attached to the bracket portion 13 in the vicinity and the first and second sheet bodies 11L and 11R to be pulled out from the first and second winding portions 12L and 12R and run at a predetermined speed. A splice that joins the first and second sheet bodies 11L and 11R to the rollers 15L and 15R, a cutting portion 20 that is provided downstream of the drive rollers 15L and 15R and cuts the first and second sheet bodies 11L and 11R. Part 30 and sp A tension control unit 40 that is provided on the downstream side of the chair unit 30 and controls the tension of the traveling sheet body, a storage unit 50 that is provided on the most downstream side and stores the sheet body in use, and the first and second It is comprised from the guide rollers 1-9 which guide the driving | running | working of the sheet | seat bodies 11L and 11R.

  The first and second sheet bodies 11L and 11R are, for example, belt-shaped and flexible sheet bodies such as paper, plastic film, and metal foil, and the first sheet body 11L is a first winding portion. The second sheet body 11R is wound around the second winding portion 12R. Adhesive tape for joining to the spare sheet body is affixed to the leading ends of the first and second sheet bodies 11L and 11R. The first and second sheet bodies 11L and 11R do not need to be provided with an adhesive tape when performing ultrasonic welding or heat welding with the spare sheet body. Moreover, the sheet | seat body used here is nonwoven fabrics, such as a top sheet used for a paper diaper, a back sheet, a gather sheet, for example.

  The 1st and 2nd winding parts 12L and 12R have a rotating shaft, and roll-shaped 1st and 2nd sheet bodies 11L and 11R wound by the winding core on this rotating shaft are installed. . The first and second winding portions 12L and 12R are provided in the bracket portion 13 so as to be separated from each other so that the first and second sheet bodies 11L and 11R do not contact each other. The first and second winding parts 12L and 12R are provided with an air brake, and have a brake function for causing the first and second sheet bodies 11L and 11R to travel at a predetermined speed.

  The remaining amount detection units 14L and 14R detect the remaining amounts of the first and second sheet bodies 11L and 11R wound around the first and second winding units 12L and 12R, for example, optical sensors. It consists of This optical sensor has a light emitting part and a light receiving part, and is provided, for example, at a position 5 mm from the cores of the first and second sheet bodies 11L and 11R. The optical sensors constituting the remaining amount detection units 14L and 14R output a detection signal for switching a winding unit to be used when detection light from the light emitting unit is detected by the light receiving unit. The remaining amount detection units 14L and 14R are not limited to the optical sensors as described above, but may be any units that can detect the remaining amounts of the first and second sheet bodies 11L and 11R. Various sensors such as a sensor and an ultrasonic sensor can be used. The positions where the remaining amount detection units 14L and 14R are provided are determined by the thicknesses of the first and second sheet bodies 11L and 11R, and are not limited to the position 5 mm from the winding core. Absent.

  The drive rollers 15L and 15R are rotationally driven by a drive motor (not shown). Nip rollers 16L and 16R are provided close to the drive rollers 15L and 15R. The driving rollers 15L and 15R travel while holding the first and second sheet bodies 11L and 11R with the nip rollers 16L and 16R. The drive rollers 15L and 15R detect the traveling speeds of the first and second sheet bodies 11L and 11R by a drive control mechanism (not shown), respectively, and the first and second winding parts 12L and 12R are set to a predetermined speed. Control each air brake. The drive roller 15L is provided on the downstream side of the guide rollers 1L to 4L and on the upstream side of the guide roller 5L. The drive roller 15R is provided downstream of the guide rollers 1R to 4R and upstream of the guide roller 5R.

  The cutting unit 20 is provided on the downstream side of the guide rollers 5L and 5R, at a position along the feeding line of the first sheet body 11L, and the feeding of the second sheet body 11R. The second cutter unit 21R is provided at a position along the supply line. The first and second cutter parts 21L and 21R have substantially the same width as the first and second sheet bodies 11L and 11R so that the first and second sheet bodies 11L and 11R can be cut at a time. have. The first cutter unit 21L is connected to an air cylinder mechanism that is a driving mechanism (not shown), and moves in a direction close to the first sheet body 11L when the first sheet body 11L is cut. The second cutter unit 21R is also connected to an air cylinder mechanism that is a drive mechanism (not shown), and moves in a direction close to the second sheet body 11R when the second sheet body 11R is cut. . Note that the cutting unit 20 is not limited to the first and second cutter units 21L and 21R as described above, and the first and second sheet bodies 11L and 11R may be sandwiched and cut by two blades. good.

  The splice portion 30 is provided on the downstream side in the vicinity of the cutting portion 20, and the first joining member 31L provided at a position along the feeding line of the first sheet body 11L and the second sheet body 11R. A second joining member 31R provided at a position along the feed line, a first drive mechanism 32L for moving the first joining member 31L, and a second drive for moving the second joining member 31R And a mechanism 32R. The first and second joining members 31L and 31R include suction means for sucking and holding the first and second sheet bodies 11L and 11R. The first and second drive mechanisms 32L and 32R are constituted by an air cylinder mechanism or the like, and move the first and second joining members 31L and 31R in directions close to each other. When the first and second joining members 31L and 31R are joined, the first and second joining members 31L and 31R move in the directions close to each other while sucking and holding the respective sheet bodies 11L and 11R, and are pressed against each other. And it joins via the adhesive tape provided in the front-end | tip part of a reserve sheet | seat body.

  The tension control unit 40 is provided on the downstream side of the splice unit 30 via the guide rollers 6 and 7, and the tension roller 41 that controls the tension of the traveling sheet body, and the rotation that the tension roller 41 is attached to one end. Arm 42. The tension control unit 40 rotates in the direction of arrow A in FIG. 1 to keep the tension of the traveling first and second sheet bodies 11L and 11R constant.

  The accumulation unit 50 is provided on the downstream side of the tension control unit 40 via the guide rollers 8 and 9. The accumulation unit 50 includes a plurality of fixed rollers 51, a plurality of movable rollers 52 that are close to and away from the fixed rollers 51, and a drive mechanism 53 that moves the movable rollers 52. The fixed rollers 51 are arranged in a line. The movable roller 52 is provided so as to be separated from the fixed roller 51 and located between the fixed rollers 51. The movable roller 52 is moved in the direction indicated by the arrow B and the direction opposite to the arrow B in FIG. In the accumulating unit 50, the sheet member in use is alternately wound on the fixed roller 51 and the movable roller 52. The accumulating unit 50 is in the direction indicated by the arrow B in FIG. 1 where the movable roller 52 is separated from the fixed roller 51 when the sheet body is supplied from either the first winding unit 12L or the second winding unit 12R. The first sheet body 11L or the second sheet body 11R that travels is accumulated. When the cutting unit 20 cuts either the first sheet body 11L or the second sheet body 11R and is joined by the splice unit 30, that is, when the sheet body is not supplied downstream, the movable roller 52 sequentially moves in the direction of arrow B in FIG. 1 adjacent to the fixed roller 51, and a sheet member is supplied to a downstream line by a driving means (not shown).

  Note that the number of fixed rollers 51 and movable rollers 52 in the storage unit 50 is not particularly limited. Further, the storage unit 50 may be configured such that the fixed roller 51 is also a movable roller.

  A splicing method that enables the first and second sheet bodies 11L and 11R using the splicing apparatus 10 configured as described above to be continuously fed will be described. Here, for convenience of explanation, the first sheet body 11L is used, and the second sheet body 11R, which is a spare sheet body, is joined to the first sheet body 11L.

  During normal operation, the first sheet member 11L is downstream of the accumulator 50 along the feed line while the tension and travel speed of the first sheet member 11L are controlled by the drive roller 15L and the tension controller 40. To the production line. At this time, the first and second cutter parts 21L and 21R of the cutting part 20 and the first and second joining members 31L and 31R are separated from the first and second sheet bodies 11L and 11R of the feeding line. ing. Further, in the accumulating unit 50, the movable roller 52 moves in the direction of arrow B in FIG. 1 and is at a position farthest from the fixed roller 51, and the first sheet body 11L in use is accumulated. Furthermore, the second sheet body 11R is sucked and held at the start end portion thereof by the second bonding member 31R.

  Next, when the remaining amount of the first sheet body 11L wound around the first winding portion 12L becomes equal to or less than a predetermined amount, the remaining amount detection portion 14L becomes less than the predetermined amount. Detect that. When the remaining amount detection unit 14L detects that the remaining amount of the first sheet body 11L has become a predetermined amount or less, the first winding unit 12L and the driving roller 15L stop the travel of the first sheet body 11L. To do. When the supply of the first sheet body 11L from the first winding unit 12L is stopped, the accumulating unit 50 sequentially moves the movable roller 52 in the direction of arrow B in FIG. Then, the sheet body that has been multiplied is loosened and the sheet body is continuously supplied to the downstream side.

  Next, the first joining member 31L of the splice unit 30 sucks and holds the first sheet body 11L that has stopped running. Then, as shown in FIG. 2, the first cutter unit 21L of the cutting unit 20 moves in the direction approaching the first sheet body 11L held by the first joining member 31L, and the first sheet body 11L is cut at a predetermined position. Then, as shown in FIG. 3, the first joining member 31L holding the cut first sheet body 11L and the second joining member 31R holding the second sheet body 11R are close to each other. It moves to a direction and the front-end | tip part of the reserve 2nd sheet | seat body 11R is joined to the 1st sheet | seat body 11L via an adhesive tape. In addition, you may make it apply | coat an adhesive agent directly to the starting end part of the 2nd sheet | seat body 11R instead of an adhesive tape. Further, ultrasonic welding or heat welding may be performed without using an adhesive tape or an adhesive.

  Next, when the splicing to the second sheet body 11R is completed, the driving roller 15R starts traveling of the second sheet body 11R. Further, the accumulating unit 50 moves the movable roller 52 in a direction opposite to the arrow B in FIG. 1 away from the fixed roller 51, and starts accumulating the second sheet member 11R.

  As described above, when splicing the first sheet body 11L in use and the second sheet body 11R which is a spare sheet body of the first sheet body 11L, the first sheet body 11L Since the splicing operation is performed while the traveling is stopped, the joining failure can be reduced as compared with the case where the splicing is performed without stopping the traveling.

  Moreover, since the splice part 30 is provided in the downstream vicinity of the cutting part 20, the distance from a joining location to the terminal part of the 1st sheet | seat body 11L can be suppressed to the minimum, and the 1st sheet | seat body 11L And a defective portion where the second sheet body 11R overlaps can be reduced.

  Further, even when the traveling of the first sheet body 11L in use during the splicing operation is stopped, the accumulated first sheet body 11L is traveling downstream by the accumulating unit 50. It is not necessary to stop the production line itself on the downstream side of the splicing device 10, and the production efficiency can be improved.

  As described above, the splicing operation is described as splicing the first sheet body 11L in use and the spare second sheet body 11R, but the second sheet body 11R is in use. The splicing operation when one sheet body 11L is a spare sheet body can be performed in the same manner as described above.

  In addition, as described above, the splicing device 10 may perform the cutting step and the splicing step in order, and may finally be spliced with a spare sheet body, for example, performing the cutting step and the joining step simultaneously, or You may cut | disconnect after a splice.

It is a figure showing the whole splicing device composition to which the present invention is applied. It is a figure which shows the state before the cutting | disconnection of a 1st sheet | seat body. It is a figure which shows the state which cut | disconnects a 1st sheet | seat body and joins with the front-end | tip part of a 2nd sheet | seat body.

Explanation of symbols

  10 splice device, 11L first sheet body, 11R second sheet body, 12L first winding part, 12R second winding part, 13 bracket part, 14L, 14R remaining amount detection part, 15L, 15R drive Roller, 16L, 16R nip roller, 20 cutting section, 21L first cutter section, 21R second cutter section, 30 splice section, 31L first joining member, 31R second joining member, 32L, 32R drive mechanism, 40 Tension control unit, 41 tension roller, 42 rotating arm, 50 accumulating unit, 51 fixed roller, 52 movable roller, 53 drive mechanism

Claims (4)

A first winding section in which the first sheet body is wound in a roll shape;
A second winding part in which the second sheet body is wound in a roll shape;
Each of the first and second winding parts is provided at a predetermined distance from the rotation shaft, and the remaining first and second sheet bodies wound around the first and second winding parts are provided. A remaining amount detection unit for detecting the amount;
A first cutter for cutting the first sheet body provided on the supply line for the first sheet body and a supply line for the second sheet body for cutting the second sheet body. A cutting portion having a second cutter;
The first sheet body provided from the first winding part and the second sheet body supplied from the second winding part are joined to the downstream side in the vicinity of the cutting part. The splice part,
Provided on the downstream side of the splice part, comprising a storage part for storing any one sheet in use,
When the remaining amount detection unit detects that the remaining amount of the sheet wound around the winding unit in use is equal to or less than a predetermined amount, the driving of the winding unit in use is stopped and the cutting is performed. The section cuts the sheet body in use, and the splice section joins the cut sheet body to the sheet body wound around the spare winding section that is stopped driving,
The splicing device according to claim 1, wherein when the first winding unit and the second winding unit are stopped, the sheet body stored in the storage unit is supplied downstream.   The accumulator includes a fixed roller and a movable roller that is close to and away from the fixed roller, and any one of the sheet bodies in use is alternately wound on the fixed roller and the movable roller. The splicing device according to claim 1, wherein: Selectively feeding downstream the first sheet wound around the first winding part and the second sheet wound around the second winding part;
Detecting whether the remaining amount of the sheet body wound around the winding unit in use has become a predetermined amount or less;
When the remaining amount of the sheet body in use is equal to or less than a predetermined amount, the step of stopping the driving of the winding unit in use;
After the driving of the winding part in use is stopped, the step of cutting the sheet body in use,
The step of joining the cut sheet body and the sheet body wound around the spare winding unit that has stopped driving;
And a step of supplying the sheet body accumulated in the accumulating section downstream when the first winding section and the second winding section are stopped.   4. The splice according to claim 3, wherein the step of joining the first sheet body and the second sheet body is performed substantially simultaneously with the step of cutting the sheet body in use. Method.

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