JP2007062874A - 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 preventing a web of a new roll from being damaged by a remaining cut portion of a web of an old roll. <P>SOLUTION: The butt-joining device 10 comprises a turret device 12 which supports an old roll 24 and a new roll 28 and is turned at every predetermined angle, 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, a motor 91 for winding a remaining cut portion 32B of the web 32 around the old roll 24, and roller 43 for guiding the remaining cut portion 32B to be wound. <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, when the web is cut with a pair of cutting drums, the web of the old roll generates an unnecessary cutting remainder on the end side from the cutting position. This cutting remainder is adsorbed on the surface of the cutting drum by suction from a hole provided on the surface of one of the cutting drums. The cutting remainder adsorbed by the cutting drum is removed from the cutting drum manually or by blowing from the hole of the cutting drum (see Patent Document 2).
Japanese Patent Laid-Open No. 9-323848 JP-A-48-38461

  However, in the conventional apparatus, there is a possibility that the remaining cutting portion adsorbed on the cutting drum or the remaining cutting portion removed from the cutting drum contacts the web of the new roll and damages the web of the new roll. In particular, when the remaining cutting portion is long, the remaining cutting portion easily comes into contact with the web of the new roll, and there is a problem that the web of the new roll is easily damaged.

  Further, in the conventional apparatus, since it is confirmed that the operator has removed the remaining cutting portion from the cutting drum, preparation for the next joining operation is performed, so that the preparation operation is delayed.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a web butt-joining method and apparatus capable of preventing the web of the new roll from being damaged by the remaining cut of the web of the old roll. .

  In order to achieve the above-mentioned object, the invention according to claim 1 includes an end portion of a belt-like flexible support that is rewound and conveyed from an old roll, and a belt-like flexible support that is rewound and conveyed from a new roll. In a butt-joining method of a web that is joined with a joining tape in a state where the tip part is abutted, the tip part of the belt-like flexible support of the new roll is held on one of a pair of cutting drums and joined to the joining drum. A preparation step for preparing a butt joint by supplying a tape, and a strip-like flexible support for the old roll and a strip-like flexibility for the new roll by the pair of cutting drums that are driven to rotate after the preparation step. And cutting the remaining support of the belt-like flexible support of the old roll on one of the pair of cutting drums. A cutting step for holding the remaining cutting portion of the belt-like flexible support body on the other of the pair of cutting drums, and a butting portion at the ends of the two belt-like flexible support members cut in the cutting step. The joint tape is affixed by the joining drum to the feeding step for feeding to the joining position while one of the pair of cutting drums to be driven and the joining drum are held together. A butt joint by the joining step, and by winding the old roll back to the old roll by rotating the old roll in the reverse direction of the rewinding direction, A winding step for removing the belt-like flexible support from the conveying line is provided.

  According to invention of Claim 1, since the winding step which winds up the cutting | disconnection remainder of the strip | belt-shaped flexible support body of an old roll to an old roll was provided, the cutting | disconnection remainder of the strip | belt-shaped flexible support body after joining is provided. Can be removed from the transfer line. Thereby, it can prevent that the cutting remainder of an old roll contacts the strip | belt-shaped flexible support body of the new roll after joining, and it can prevent that the strip | belt-shaped flexible support body after joining is damaged.

  According to the invention described in claim 1, the preparation step for the next joining operation can be immediately performed by performing the winding step.

  According to a second aspect of the present invention, in the first aspect of the invention, in the winding step, when the remaining cutting portion is wound around the old roll, a guide roller is used to prevent the remaining cutting portion from rubbing against the one cutting drum. It is characterized by guiding.

  According to the second aspect of the present invention, since the guide roller is provided, it is possible to prevent the remaining cutting portion from being caught on one cutting drum.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the remaining cutting portion of the strip-shaped flexible support of the new roll held by the other cutting drum is released by releasing the holding. It is made to fall off from a cutting drum.

  In order to achieve the above object, the invention according to claim 4 includes a terminal portion of the belt-like flexible support that is rewound and conveyed from the old roll, and a belt-like flexible support that is rewound and conveyed from the new roll. In a web butt-joining apparatus that joins with a joining tape in a state where the leading end part is butt-joined, the old roll and the new roll are supported so that they can be rewound, and a turret means that can be rotated at a predetermined angle and rotationally driven. A pair of cutting drums for cutting the old roll band-like flexible support and the new roll band-like flexible support in an overlapped state, and the old roll is placed on one of the pair of cutting drums. A pair of cutting drums that hold the remaining cutting portion of the belt-like flexible support body and a cutting remaining portion of the belt-like flexible support body of the new roll on the other of the pair of cutting drums, and the bonding tape are held. A joining drum for adhering the joining tape to the abutting portion of the end portions of the two strip-shaped flexible supports by rotation driving, and a strip-shaped flexible support of the old roll Winding means for winding the remaining cutting portion around the old roll, and a guide roller that is provided along a conveying line of the belt-like flexible support and guides winding of the remaining cutting portion when winding by the winding means. And.

  According to the fourth aspect of the present invention, since the winding means for winding up the remaining cutting portion of the old roll strip-shaped flexible support body around the old roll is provided, the cutting residual portion of the strip-shaped flexible support body after joining is provided. Can be removed from the transfer line. Thereby, it can prevent that the cutting remainder of an old roll contacts the strip | belt-shaped flexible support body of the new roll after joining, and it can prevent that the strip | belt-shaped flexible support body after joining is damaged.

  Further, according to the invention described in claim 4, after the cutting remainder is wound up and removed from the conveying line, the next joining operation can be immediately prepared.

  The invention according to claim 5 is the invention according to claim 4, wherein the guide roller is provided on the one cutting drum.

  According to the fifth aspect of the present invention, since the guide roller is provided, it is possible to prevent the remaining cutting portion from being caught on one cutting drum and to smoothly wind the remaining cutting portion.

  According to the present invention, the cutting remainder of the strip-shaped flexible support of the old roll is wound on the old roll, so that the cutting remainder can be removed from the transport line of the strip-shaped flexible support after joining, It can prevent that a cutting | disconnection remainder damages the strip | belt-shaped flexible support body of the new roll after joining.

  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 old roll 24 and the new roll 28 are respectively connected to motors 91 and 92 (see FIG. 7). By driving the motors 91 and 92, the old roll 24 and the new roll 28 are moved in the web winding direction. It is rotationally driven (ie, in the opposite direction during rewinding). 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, 42 are connected to motors 93, 94, 95 (see FIG. 7), respectively, and the drums 38, 40, 42 are synchronized by driving the motors 93, 94, 95. Is rotated. In FIG. 7, each drum 38, 40, 42 is individually connected to the motors 93, 94, 95. However, the present invention is not limited to this. , 40 and 42 may be rotationally driven.

  As shown in FIG. 2, the web 32 from the old roll 24 is inserted between the cutting drum 38 and the cutting joining drum 40 and between the cutting joining drum 40 and the joining drum 42. It is sent to a shock absorber (not shown) that buffers tension fluctuations and speed fluctuations. 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 provided in an arc-shaped outer peripheral portion. Further, guide rollers 43 and 43 are rotatably attached to both end positions of the arc-shaped outer peripheral portion. The rollers 43 and 43 rotate together with the cutting and joining drum 40 when the cutting and joining drum 40 is driven to rotate.

  Further, a plurality of suction ports 45 (only one is shown in FIG. 2) are formed in the arc-shaped outer peripheral portion at a position downstream of the cutting portion 48 in the rotation direction. The plurality of suction holes 45 are arranged close to the cutting line and parallel to the cutting line. Each suction hole 45 is connected to a suction device (not shown). Therefore, by driving the suction device, it is possible to adsorb the remaining cut portion of the web 32 of the old roll 24 (that is, the distal end portion of the web 32 after cutting: see FIG. 6) 32B to the adsorption hole 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.

  FIG. 7 is a schematic diagram showing the main configuration of the above-described joining apparatus 10. As shown in the figure, the joining apparatus 10 includes motors 91 and 92 that rotate the old roll 24 and the new roll 28 in the winding direction, and motors 93 and 94 that rotate the drums 38, 40, and 42, respectively. 95 is provided. These motors 91 to 95 are driven and controlled by the control device 99. The control device 99 is electrically connected to a sensor 97 provided in the turret device 12, starts driving the motors 93 to 95 based on the detection signal of the sensor 97, and after several seconds, the motor 91, The driving of 92 is started.

  Each of the sensors 97 is a sensor that detects the end position of the web 32. That is, the sensor 97 detects the end position when the web 32 is rewound from the old roll 24 and its end position appears on the old roll 24. Therefore, when the control device 99 starts driving the motors 93 to 95 based on the detection signal of the sensor 97, the cutting and joining work can be started before the web 32 is completely rewound from the old roll 24.

  The configuration and mounting position of the sensor 97 are not particularly limited as long as the detection signal is transmitted to the control device 99 before the web 32 is completely rewound from the old roll 24. Therefore, a sensor for detecting the remaining amount of the web 32 wound around the old roll 24 may be used, or the remaining length calculation from the outer diameter of the old roll 24 may be performed.

  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, as shown in FIG. 2, the cutting drum 38 holds the tip 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 end of the web 32 appears on the old roll 24 and the sensor 97 detects the end, the control device 99 receives the detection signal from the sensor 97 and starts driving the motors 93 to 95. To control. Thereby, the cutting drum 38, the cutting and joining drum 40, and the joining drum 42 start to rotate, and the web 44 of the new roll 28 starts to travel.

  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).

  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 webs 32 and 44 joined in the joining step are sent to the shock absorber 80, the cutting and joining drum 40 is rotated so that the remaining cutting portion 32B adsorbed and held on the cutting and joining drum 40 is peeled off from the web 44 as shown in FIG. Is done. The peeled web 44 is wound around the old roll 24 by winding the old roll 24 in the winding direction (winding step). Hereinafter, the winding step will be described.

  In the winding step, first, the control device 99 drives the motor 91 to rotate the old roll 24 in the web winding direction. At this time, since the end portion of the cutting remaining portion 32B is engaged with the old roll 24, the cutting remaining portion 32B is wound around the old roll 24 by rotating the old roll 24. At that time, as shown in FIG. 6, the tip portion of the remaining cutting portion 32B is engaged with the cutting joining drum 40, but the remaining cutting portion 32B is in contact with the guide rollers 43 and 43 provided rotatably. The cutting remainder 32B is smoothly pulled out without being caught by the cutting joining drum 40. As a result, the remaining cutting portion 32B is removed from the conveyance line of the web 44, so that it is possible to prevent the remaining cutting portion 32B from coming into contact with the web 44 and damaging the web 44.

  As described above, according to the present embodiment, after the webs 32 and 44 are joined, the remaining cutting portion 32B is wound around the old roll 24, and further guided by the roller 43 when the winding is performed. It is possible to prevent the web 44 of the roll 28 from being damaged.

  Further, according to the present embodiment, since the cutting / joining operation is performed with the end portion of the web 32 engaged with the old roll 24, the web 32 is prevented from swinging in the width direction during the cutting / joining operation. Therefore, cutting and joining work can be performed with high accuracy.

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 configuration of the main part of the butt-joining device

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Web butt joining apparatus, 12 ... Turret apparatus, 14 ... Cutting joining unit, 16 ... Web conveying apparatus, 32 ... Web, 38 ... Cutting drum, 40 ... Cutting joining drum, 42 ... Joining drum, 44 ... Web, 72 ... guide member, 91-95 ... motor, 97 ... sensor, 99 ... control device

Claims (5)

The web to be joined by the joining tape in a state in which the end portion of the belt-like flexible support that is rewound and transported from the old roll is in contact with the tip of the belt-like flexible support that is rewound and transported from the new roll. In the 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;
After the preparatory step, the pair of cutting drums that are driven to rotate are cut 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, and the old roll A cutting step of holding the cutting remainder of the belt-like flexible support of one of the pair of cutting drums and holding the cutting remainder of the belt-like flexible support of the new roll on the other of the pair of cutting drums;
Sending the butt portion of the ends of the two strip-shaped flexible supports cut in the cutting step to the joining position while holding the one of the pair of cutting drums to be rotated and the joining drum in cooperation with each other. Included steps,
A joining step of adhering the joining tape with the joining drum to the butting portion fed to the joining position;
And butt-joining with
By rotating the old roll in the reverse direction of the rewinding direction, the remaining cutting portion held on the one cutting drum is wound around the old roll and removed from the transport line of the belt-like flexible support. A web butt-joining method comprising a winding step.   2. The web according to claim 1, wherein in the winding step, when the remaining cutting portion is wound on the old roll, the cutting remaining portion is guided by a guide roller so that the remaining cutting portion does not rub against the one cutting drum. Butt joining method.   The cutting remaining part of the strip-like flexible support of the new roll held by the other cutting drum is dropped from the other cutting drum by releasing the holding. Butt joining method of web. The web to be joined by the joining tape in a state in which the end portion of the belt-like flexible support that is rewound and transported from the old roll is in contact with the tip of the belt-like flexible support that is rewound and transported from the new roll. In the 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 that cut 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 being driven to rotate, and one of the pair of cutting drums A pair of cutting drums that hold the cutting remainder of the band-like flexible support of the old roll and hold the cutting remainder of the band-like flexible support of the new roll on the other of the pair of cutting drums;
A bonding drum that includes a tape holding unit that holds the bonding tape, and that is rotationally driven to adhere the bonding tape to a butt portion of the end portions of the two strip-shaped flexible supports;
Winding means for winding the remaining cutting portion of the belt-like flexible support of the old roll around the old roll, and a winding line provided along the transport line of the belt-like flexible support, and when winding by the winding means A guide roller for guiding winding of the remaining cutting portion;
A web butt-joining apparatus comprising:   5. The web butt joining apparatus according to claim 4, wherein the guide roller is provided on the one cutting drum.

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