JP2007062873A - Method and device for butt-joining web - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for butt-joining webs capable of correctly performing the web cutting and joining works, and realizing miniaturization of the device. <P>SOLUTION: The butt-joining device 10 comprises a turnable turret device 12 which supports an old roll 24 and a new roll 28 in a rewinding manner, a sensor 100 for detecting an end 32A of a web 32 of the old roll 24 on the old roll 24, a cutting drum 38 and a cut-joining drum 40 for cutting a web 32 of the old roll 24 and a web 44 of the new roll 28 in an overlapping condition, a joining drum 42 which holds a joining tape 62 and affixes it to joined portions of the webs 32, 44, and a control device 102 for turning the drums 38, 40, 42 when the sensor 100 detects the end. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a web butt-joining method and apparatus, and more particularly to a web butt-joint method for joining the ends of a strip-like flexible support (hereinafter referred to as “web”) such as plastic, paper, and metal foil. Relates to the device.

  As described in Patent Document 1, this type of web butt joining apparatus includes a web turret device, a web cutting and joining unit, and the like. The turret device has a turret arm, and rearranges the positions of the old roll and the new roll that are pivotally supported at both ends of the turret arm, and sequentially supplies the web to the cutting and joining unit. The cutting and joining unit has a pair of cutting drums and a joining drum, and continuously supplies the web end portion of the old roll that has been rewound and the web leading end portion of the new roll that is to be rewound. It cut | disconnects with a cutting drum, and the edge parts of the cut | disconnected web are joined with a joining tape with a joining drum. According to such a joining apparatus, the end portions can be butt-joined while continuously feeding the web of the old roll and the web of the new roll.

  By the way, in the conventional apparatus, the end of the web rewound from the old roll is detected on the web conveyance line, and each drum is rotated based on the detection signal to perform cutting and joining operations. For example, as shown in FIG. 9, a transmission type optical sensor 3 is provided on the conveyance line of the web 2 rewound from the old roll 1. The optical sensor 3 detects the end 2A of the web 2 to start rotating the drums.

  However, in such a device configuration, the cutting and joining operation is performed in a state where the end of the web 2 of the old roll 1 is separated from the old roll 1, so that the end 2 </ b> A of the web 2 may be meandered as a free end. there were. For this reason, the position of the web 2 may be shifted in the width direction during the cutting / joining operation, and the accuracy of the cutting / joining operation may be reduced.

Therefore, in the apparatus described in Patent Document 2, the web is held by the holding means immediately before the end of the web of the old roll is separated from the old roll. As a result, the web can be prevented from meandering, and the end of the web can be accurately guided to the cutting / joining position.
Japanese Patent Laid-Open No. 9-323848 Japanese Patent No. 358456

  However, the apparatus of Patent Document 2 has a problem that the apparatus becomes large because an installation space for holding means is required between the turret device and the cutting and joining unit. In addition, since the turret device and the cutting and joining unit are installed apart from each other because the holding means is provided, there is a problem that the remaining cutting portion of the web of the old roll (that is, the unnecessary portion on the terminal side from the cutting position) becomes longer. there were.

  The present invention has been made in view of the above circumstances, and provides a web butt-joining method and apparatus that can accurately perform web cutting and joining operations and can be miniaturized. Objective.

  In order to achieve the above object, the first aspect of the present invention provides the end of the belt-like flexible support that is rewound and conveyed from the old roll in use, and the belt-like flexibility that is rewound and conveyed from the new roll. In a butt-joining method of a web that is joined by a joining tape in a state in which the tip of the support is abutted, the tip of the belt-like flexible support of the new roll is held on one of a pair of cutting drums and joined. A preparation step of preparing a butt joint by supplying a bonding tape to the drum, and a detection step of detecting on the old roll the end of the belt-like flexible support that is rewound and conveyed from the old roll in use And a driving start step for starting rotational driving of the pair of cutting drums and the joining drum based on the result detected in the detecting step; and The cutting step of cutting the old roll strip flexible support and the new roll strip flexible support in a state of being overlapped by the pair of cut cutting drums, and the cutting step. A feeding step of feeding the joining portion of the two belt-like flexible supports to the joining position while holding together the one of the pair of cutting drums and the joining drum, and sending to the joining position A joining step of attaching the joining tape to the butted portion with the joining drum.

  According to the first aspect of the invention, when the end of the belt-like flexible support of the old roll is detected on the old roll, the rotation of each drum is started to perform cutting and joining. Cutting and joining operations can be performed while a predetermined tension is applied to the flexible support. Therefore, it is possible to accurately cut and join the belt-like flexible support of the old roll and the belt-like flexible support of the new roll.

  The invention according to claim 2 is the invention according to claim 1, further comprising a winding step of winding the uncut portion of the strip-like flexible support of the old roll around the old roll after the joining step. . In the present invention, since the end of the strip-shaped flexible support is detected on the old roll and the cutting / joining operation is started, the remaining cutting portion of the strip-shaped flexible support of the old roll can be wound on the old roll. .

  In order to achieve the above-mentioned object, the invention according to claim 3 has the end portion of the belt-like flexible support that is rewound and conveyed from the old roll in use, and the belt-like flexibility that is rewound and conveyed from the new roll. In a butt-joining apparatus for a web that is joined by a joining tape in a state in which the front end portion of the support is abutted, a turret means that supports the old roll and the new roll so that they can be rewound and can rotate at predetermined angles. A pair of cutting drums for cutting the old roll band-like flexible support and the new roll band-like flexible support in a state of being overlapped with each other, and a tape holding unit for holding the joining tape A joining drum for adhering the joining tape to the abutting portion of the end portions of the two strip-shaped flexible supports, and a distal end of the strip-like flexible support of the old roll A sensor for detecting on 該旧 roll, based on the detection result of the sensor, characterized by comprising a controller for controlling the rotation drive of the pair of cutting drum and the splicing drum.

  According to the invention of claim 3, since the end portion of the strip-like flexible support of the old roll is detected on the old roll and the rotation of each drum is started to perform cutting and joining, the strip-like flexibility of the old roll is obtained. The cutting / joining operation can be performed in a state where a predetermined tension is applied to the conductive support, and the cutting / joining of the new roll with the belt-like flexible support can be performed accurately.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, after the butt portion is butt-joined, the control device winds up the remaining cutting portion of the strip-like flexible support of the old roll. Is driven in reverse rotation.

  According to invention of Claim 4, the cutting | disconnection remainder of the strip | belt-shaped flexible support body of an old roll can be wound up on an old roll.

  According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, the sensor includes a measurement position close to the old roll, and a retreat position retracted from a transport line of the belt-like flexible support of the old roll. It is characterized by providing a moving means for moving between.

According to the fifth aspect of the present invention, the end of the web of the old roll can be reliably detected, and the sensor can be prevented from coming into contact with the web or the old roll.

  According to the present invention, when the end of the belt-like flexible support of the old roll is detected on the old roll, the rotation of each drum is started to perform cutting and joining operations. Cutting and joining operations can be performed while a predetermined tension is applied to the support, and the cutting and joining of the old roll strip flexible support and the new roll strip flexible support are accurately performed. be able to.

  Preferred embodiments of a web butt-joining method and apparatus according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is an overall configuration diagram of a web butt joining apparatus according to an embodiment of the present invention. As shown in the figure, the joining device 10 is mainly composed of a turret device 12 and a cutting and joining unit 14.

  The turret device 12 has a turret arm 18, and this turret arm 18 is rotatably provided on a support 20 with a shaft 22 as a fulcrum. At one end of the turret arm 18, an old roll 24, which has finished rewinding the web, is rotatably supported via a shaft 26, and at the other end, a new roll 28, which starts rewinding the web, has a shaft 30. It is supported so that it can rotate through. The web 32 wound around the old roll 24 is unwound from the old roll 24, and then rolled onto the guide rollers 34 and 36 and guided to the cutting and joining unit 14.

  As shown in FIG. 2, the cutting and joining unit 14 includes a cutting drum 38, a cutting and joining drum (corresponding to a cutting drum) 40, and a joining drum 42, and each drum 38, 40, 42 is installed in the machine frame 41. ing. The drums 38, 40, and 42 are rotated in synchronization by a drive unit 104 (see FIG. 7) including a motor or the like.

  The web 32 from the old roll 24 described above is inserted between the cutting drum 38 and the cutting and joining drum 40 and between the cutting and joining drum 40 and the joining drum 42, and then the tension and speed of the web 32 are changed. Is sent to a buffering device (not shown) for buffering. On the other hand, the front end of the web 44 from the new roll 28 is attracted to the cutting drum 38 and waits in a state where the preparation for joining is completed.

  A cutter 46 is provided on the outer periphery of the cutting drum 38. The cutter 46 is attached so as to protrude from the outer peripheral surface of the cutting drum 38 by a predetermined amount. Further, the cutter 46 is attached at a predetermined inclination angle θ ° with respect to the width direction of the cutting drum 38 (that is, the width direction of the webs 32 and 44) for improving the sharpness. The cutting / joining drum 40 is provided with a cutting portion 48 at a position where the cutter 46 abuts. The web 32 and the web 44 are sandwiched between the cutting portion 48 and the cutter 46 so that the web 32 and the web 44 are sandwiched. Disconnected.

  A flat portion is provided on the surface of the cutting drum 38, and air holes 50 are formed in the flat portion. These vent holes 50, 50 are communicated with the internal space 52 </ b> A of the rotary hollow shaft 52 through the vent holes 54 formed in the rotary hollow shaft 52. A suction device (not shown) communicates with the internal space 52A of the rotary hollow shaft 52. By driving this suction device, a suction force is applied to the vent holes 50, 50, and the vicinity of the tip of the web 44 is located in the vent hole 50. , 50 is held by suction. Further, a jet outlet 61 is formed on the surface of the cutting drum 38 at a position downstream of the cutter 46 in the rotational direction. The jet port 61 communicates with the internal space 52 </ b> B of the rotary hollow shaft 52 through a vent hole 63 formed in the rotary hollow shaft 52. The internal space 52B is communicated with an air supply device (not shown), and air is ejected from the ejection port 61 by driving the air supply device. Accordingly, the remaining cutting portion (see FIG. 5) 44 </ b> B after cutting the web 44 can be detached from the cutting drum 38. In addition, it is preferable to provide a baffle plate (not shown) so that the air injected from the injection port 61 does not directly hit the joining drum 42.

  In the joining drum 42, intake holes 56, 56 are formed. The intake hole 56 communicates with a vent hole 60 formed in the rotary hollow shaft 58, and the rotary hollow shaft 58 is connected to a suction device (not shown). Therefore, by driving the suction device, the bonding tape 62 is attracted and held in the intake hole 56. The joining tape 62 is automatically supplied by a tape supply device (not shown).

  As shown in FIG. 2, the cutting and joining drum 40 has a substantially D-shaped cross section, and the above-described cutting portion 48 is attached to an arc-shaped outer peripheral portion. In addition, guide rollers 43 and 43 are rotatably attached to both end positions of the arc-shaped outer peripheral portion so that the web 32 is not caught at both end positions of the arc-shaped outer peripheral portion.

  In addition, a plurality of suction ports 45 (only one is shown) are formed in the arc-shaped outer peripheral portion at a position downstream of the cutting portion 48 in the rotation direction. The suction ports 45 are arranged close to the cutting line and parallel to the cutting line. Each suction port 45 is connected to a suction device (not shown). Therefore, by driving the suction device, it is possible to adsorb the remaining cutting portion of the web 32 of the old roll 24 (that is, the end portion of the web 32 after cutting: see FIG. 6) 32B to the suction port 45.

  As shown in FIG. 2, a guide member 72 is provided at an intermediate position between the cutting drum 38, the cutting / joining drum 40, and the joining drum 42. The surface of the guide member 72 is coated with a fluorine resin or the like so that the webs 32 and 44 slide smoothly. The guide member 72 has an upper surface formed in an arc shape. When the cutting / joining drum 40 rotates and the arc-shaped outer peripheral surface faces the guide member 72, the guide member 72 is connected to the cutting / joining drum 40. It forms so that it may become a fixed space | interval with respect to a circular arc-shaped outer peripheral surface. By guiding with the guide member 72, the end portions of the webs 32 and 44 can be fed into the joining position with the end portions being in contact with each other.

  By the way, the turret device 12 of the present embodiment is provided with a sensor 100 as shown in FIG. For example, a photoelectric passing sensor is used as the sensor 100, and when the end 32A of the web 32 passes on the old roll 24, it can be detected.

  The sensor 100 is electrically connected to the control device 102. The control device 102 includes a drive unit 104 that rotationally drives the drums 38, 40, and 42, a drive unit 106 that moves the sensor 100 forward and backward relative to the old roll 24, and a drive unit 108 that rotates the old roll 24 (described later). Corresponding to the cylinders 110 and 112), and is configured to drive-control each of the drive units 104, 106, and 108 based on a detection signal from the sensor 100. For example, when the sensor 100 detects the end 32 </ b> A of the web 32, control is performed so as to start driving the drums 38, 40, and 42. Thereby, while the terminal end 32A of the web 32 is wound around the old roll 24, the drums 38, 40, and 42 can be rotated to perform cutting and joining operations.

  In addition, the control device 102 controls the old roll 24 to rotate reversely before the end 32 </ b> A of the web 32 is separated from the old roll 24 after the cutting / joining operation. As a result, the remaining cut portion 32 </ b> B of the web 32 after cutting can be wound around the old roll 24.

  Further, when the remaining amount of the web 32 wound around the old roll 24 is large or when the turret arm 18 is rotated, the control device 102 moves the sensor 100 to a retreat position away from the old roll 24. Then, when the remaining amount of the web 32 of the old roll 24 is reduced, the sensor 100 is moved to a position close to the old roll 24. Accordingly, the sensor 100 can be brought close to the old roll 24 to reliably detect the end 32A of the web 32, and the sensor 100 can be prevented from coming into contact with the web 32 or the old roll 24.

  The sensor 100 is supported via cylinders 110 and 112 as shown in FIG. The cylinder 110 has two rods 114 and 114 that expand and contract in synchronization with the width direction of the web 32, and the sensor 100 is supported at the tips of the rods 114 and 114. Therefore, by driving the cylinder 110, the sensor 100 can be moved to the outside in the width direction of the web 32. On the other hand, the cylinder 112 has two rods 116 and 116 that are fixed to the cylinder 110 and extend and contract in synchronization with the vertical direction, and the tips of the rods 116 and 116 are fixed to an apparatus main body (not shown). Connected to the fixed portion 118. Therefore, by driving the cylinder 112, the cylinder 110 can be moved up and down, and the sensor 100 can be moved to the upper retracted position indicated by the two-dot chain line.

  Thus, by driving the cylinders 110 and 112, the sensor 100 can be moved to the retracted position, and the sensor 100 can be prevented from contacting the web 32 or the old roll 24. Note that the moving mechanism of the sensor 100 is not limited to the above-described embodiment. For example, the sensor 100 may be supported by an arm, and the arm may be swung and moved forward and backward.

  Next, the operation of the web butt joining apparatus constructed as described above will be described with reference to FIGS.

  First, as a preparation step, the cutting drum 38 is caused to hold the tip end portion of the web 44 of the new roll 28. Further, the joining tape 62 is held on the joining drum 42. In this state, the feeding of the web 32 from the old roll 24 is continued. Then, when the remaining amount of the web 32 of the old roll 24 is reduced, the control device 102 controls the drive unit 106 and arranges the sensor 100 at a position close to the old roll 24.

  When the end 32A of the web 32 appears on the old roll 24, the sensor 100 detects the end 32A (detection step) and transmits a detection signal to the control device 102. When receiving the detection signal from the sensor 100, the control device 102 controls the drive unit 104 to start rotation of the drums 38, 40, and 42 (drive start step).

  By rotating the cutting drum 38 and the cutting and joining drum 40, the webs 32 and 44 are fed between the cutting drum 38 and the cutting and joining drum 40 in a superposed state as shown in FIG. 3. As shown in FIG. 4, the webs 32 and 44 are sandwiched and cut between the cutter 46 of the cutting drum 38 and the cutting portion 48 of the cutting and joining drum 40 (cutting step). At that time, the end 32A of the web 32 is wound around the old roll 24, and there is no possibility of acting like a free end. Therefore, the cutting work of the webs 32 and 44 can be performed with high accuracy, and the accuracy of the butting work described later can be improved.

  The cut webs 32 and 44 are sent out from the cutting drum 38 and the cutting joining drum 40 in a state in which the end of the web 32 and the tip of the web 44 are in contact with each other. At that time, the abutting portion can be reliably fed into the gap between the guide member 72 and the cutting / joining drum 40 by injecting air from the outlet 61 of the cutting drum 38. The fed webs 32 and 44 are guided by the guide member 72 to move the gap between the guide member 72 and the cutting and joining drum 40 while maintaining the abutted state, and are moved to the joining position as shown in FIG. It is sent (feeding step). When the webs 32 and 44 are fed, the remaining cutting portion 44B of the web 44 of the new roll 28 (that is, the portion on the tip side with respect to the cutting position) 44B is attracted to the cutting drum 38 and peeled off from the web 32 and removed. Further, the remaining cutting portion 32 </ b> B of the web 32 of the old roll 24 is attracted to the suction port 45 of the cutting and joining drum 40 and is sent to the joining position while being overlapped with the web 44.

  The webs 32 and 44 fed to the joining position are bonded with the joining tape 62 at the abutting portions. As a result, the butted portions of the webs 32 and 44 are joined (joining step). The joined webs 32 and 44 are sent to a subsequent buffer device (not shown) to buffer tension fluctuations and speed fluctuations.

  By the way, when the joined webs 32 and 44 are sent to the shock absorber, the cutting and joining drum 40 rotates as shown in FIG. The The remaining cut portion 32B after peeling is wound around the old roll 24 by rotating the old roll 24 in the reverse direction. That is, the control device 102 controls the driving unit 104 to rotate each drum 38, 40, 42 by a predetermined angle, and then controls the driving unit 108 to drive the old roll 24 in the winding direction. Rotate (that is, in the reverse direction of rewinding). As a result, the remaining cut portion 32 </ b> B of the web 32 is wound around the old roll 24.

  As described above, according to the present embodiment, the end 32A of the web 32 is detected on the old roll 24 by the sensor 100, and the rotation of each drum 38, 40, 42 is started. Cutting and joining operations can be performed before 32A leaves the old roll 24. Accordingly, the cutting and joining work can be performed while the web 32 is under a predetermined tension, so that the web 32 is not displaced in the width direction, and the webs 32 and 44 can be cut and joined with high precision. It can be carried out.

  Further, according to the present embodiment, it is not necessary to separately provide a holding means for holding the end side of the web 32. Therefore, the turret device 12 and the cutting and joining unit 14 can be arranged close to each other, and the device can be reduced in size. Can be

  Furthermore, since the turret device 12 and the cutting / joining unit 14 can be arranged close to each other, the remaining cutting portion 32B of the web 32 can be shortened. Therefore, since a discard part can be reduced, manufacturing efficiency can be improved.

  In the above-described embodiment, the remaining cut portion 32B of the web 32 is wound around the old roll 24. However, the present invention is not limited to this, and a removing means for adsorbing and removing the remaining cut portion 32B with a sucker or the like is provided. May be.

Overall configuration diagram of a web butt joining apparatus according to an embodiment of the present invention Configuration diagram showing the cutting and joining unit before cutting and joining work Configuration diagram of the cutting and joining unit for explaining the cutting and joining work Configuration diagram of the cutting and joining unit for explaining the cutting and joining work Configuration diagram of the cutting and joining unit for explaining the cutting and joining work Configuration diagram of the cutting and joining unit for explaining the cutting and joining work Schematic diagram showing the main components of the joining device Side view showing the moving mechanism of the sensor Schematic diagram showing a conventional sensor

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Web butt joining apparatus, 12 ... Turret apparatus, 14 ... Cutting joining unit, 32 ... Web, 32B ... Cutting remainder, 38 ... Cutting drum, 40 ... Cutting joining drum, 42 ... Joining drum, 44 ... Web, 100 ... Sensor, 102 ... Control device, 104, 106, 108 ... Drive unit, 110, 112 ... Cylinder

Claims (5)

Joined with a joining tape in a state where the end of the belt-like flexible support that is rewound and transported from the old roll in use is in contact with the tip of the belt-like flexible support that is rewound and transported from the new roll In the web butt-joining method,
A preparatory step for preparing a butt joint by holding one end of the belt-like flexible support of the new roll on one of a pair of cutting drums and supplying a joining tape to the joining drum;
A detection step of detecting an end of the belt-like flexible support that is rewound from the old roll in use on the old roll;
A driving start step for starting rotational driving of the pair of cutting drums and the joining drum based on the result detected in the detecting step;
A cutting step of cutting the old roll strip flexible support and the new roll strip flexible support with the pair of cutting drums rotated in the driving start step,
A feeding step of feeding the butted portion of the end portions of the two strip-shaped flexible supports cut in the cutting step to the joining position while cooperatively holding one of the pair of cutting drums and the joining drum; ,
A joining step of adhering the joining tape with the joining drum to the butting portion fed to the joining position;
A web butt-joining method characterized by comprising:   The web butt-joining method according to claim 1, further comprising a winding step of winding the uncut portion of the strip-like flexible support of the old roll around the old roll after the joining step. Joined with a joining tape in a state where the end of the belt-like flexible support that is rewound and transported from the old roll in use is in contact with the tip of the belt-like flexible support that is rewound and transported from the new roll In a web butt joining device,
A turret means that supports the old roll and the new roll so that they can be rewound, and is rotatable at a predetermined angle;
A pair of cutting drums for cutting in a state where the belt-like flexible support of the old roll and the belt-like flexible support of the new roll are overlapped by rotating and driving,
A joining drum for attaching the joining tape to the abutting part of the end portions of the two strip-like flexible supports by providing a tape holding part for holding the joining tape and rotating the joining tape;
A sensor for detecting an end of the belt-like flexible support of the old roll on the old roll;
A control device for controlling the rotational drive of the pair of cutting drums and the joining drum based on the detection result of the sensor;
A web butt-joining apparatus comprising:   The said control apparatus reversely drives the said old roll so that the cutting | disconnection remainder of the strip | belt-shaped flexible support body of the said old roll may be wound up after butt-joining the said butt | matching part. Web butt joining equipment. The moving means for moving the sensor between a measurement position close to the old roll and a retreat position retracted from a transport line of a belt-like flexible support of the old roll is provided. The web butt-joining apparatus according to 3 or 4.

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