JP4483747B2 - Web butt joining method and apparatus - Google Patents

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, the cutting and joining unit described above is provided with a guide member that guides the cut web from the cutting position to the joining position. By guiding with the guide member, the abutting portion between the end portions of the web is joined. It is sent to the position and the bonding tape is stuck.
Japanese Patent Laid-Open No. 9-323848

  However, in the conventional apparatus, there is a possibility that the web may be displaced in the width direction while the web after cutting is fed from the cutting position to the joining position, or the gap between the end portions of the web may be widened, resulting in joining failure. . For this reason, a guide member that can reliably maintain the butted state of the end portions of the web is required. However, Patent Document 1 does not have a detailed description of the guide member.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a web butt-joining method and apparatus capable of improving the quality of bonding.

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 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. The belt-like flexible support of the old roll and the belt-like flexible support of the new roll are overlapped by rotating at the same speed as the conveyance speed of the belt-like flexible support during the joining operation. A pair of cutting drums for cutting and a tape holding part for holding the bonding tape are provided, and the two belt-shaped possible members are rotated by being driven at the same speed as the conveying speed of the band-shaped flexible support during the bonding operation. A joining drum for adhering the joining tape to the abutting portion of the end portion of the flexible support, and a guide member for guiding the abutting portions of the end portions of the two belt-like flexible supports to the joining position. A guide member provided so that a gap with respect to the cutting drum arranged on the joining position side of the cutting drum gradually increases on the inlet side, and a strip-shaped flexible support cut by the pair of cutting drums. An air jetting unit that blows air and presses against a cutting drum disposed on the joining position side of the pair of cutting drums, and is provided between the air jetting unit and the joining drum; And a blocking means for blocking the jet air .

According to the first aspect of the present invention, by guiding the cut strip-shaped flexible support with the guide member configured as described above, the end portions of the two strip-shaped flexible supports are surely brought into contact with each other. It can be sent to the joining position while keeping it. Therefore, the joining quality in the joining step can be improved.
And since air was jetted and the butt portion of the belt-like flexible support was pressed against one of the cutting drums, the feeding to the joining position can be performed reliably, and the web joining accuracy can be improved. Can do. Further, since the blocking means is provided so that the spray air does not directly hit the joining drum, it is possible to prevent the joining tape held on the cutting drum from being displaced or peeled off by the spray air.

The invention according to claim 2 is characterized in that, in the invention according to claim 1 , the guide member is provided at the entrance so that a gap with respect to the one cutting drum is larger than a gap with respect to the other cutting drum. To do. Therefore, according to the invention of claim 2 , it is possible to feed the cut web to a reliable joining position.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the surface of the guide member is resin-coated. Therefore, according to the invention of claim 3 , the belt-like flexible support can easily slide with respect to the guide member, and the abutted state can be more reliably maintained.

The invention according to claim 4 is the invention according to any one of claims 1 to 3 , wherein the blocking means is a support member that supports the guide member.
The invention according to claim 5 includes: an end portion of the belt-like flexible support that is rewound and conveyed from the old roll in use; and a tip portion of the belt-like flexible support that is rewound and conveyed from the new roll. In a butt-joining method for webs that are joined together with a joining tape in the butted state, one of a pair of cutting drums holds the tip of the belt-like flexible support of the new roll, and the joining tape is supplied to the joining drum. A preparatory step for preparing butt joining, and after the preparatory step, the pair of cutting drums and the joining drums are rotationally driven at the same speed as the conveying speed of the belt-like flexible support, A cutting step of cutting the old roll band-like flexible support body and the new roll band-like flexible support body in a state of being overlapped by a cutting drum, and the cutting step A feeding step of feeding a butted portion of the two cut strip-like flexible supports to a joining position while cooperatively holding one of the pair of cutting drums and the joining drum; A feeding step of guiding and feeding the abutting portion by a guide member provided so that a gap with respect to the cutting drum on the joining position side of the pair of cutting drums is gradually increased on the inlet side; and sent to the joining position A joining step of adhering the joining tape with the joining drum to the butt portion, and in the feeding step, the butt is obtained by ejecting air from the other of the pair of cutting drums by air ejecting means. Is pressed between the one cutting drum and sent to the joining position, and is provided between the air ejecting means and the joining drum. The blocking means, characterized in that the jet air from the air injection means is shut off so as not to hit the joining drum. The invention of claim 5 describes the apparatus invention of claim 1 as a method invention.

  According to the present invention, the strip-shaped flexible support after cutting is guided by the guide member whose gap with respect to the cutting drum on the joining position side gradually increases on the inlet side. It can be sent to the joining position while reliably maintaining the butted state of the end of the body, and the joining quality in the joining step can be improved.

  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. Further, each of the drums 38, 40, and 42 is rotated in synchronization by power from a drive motor (not shown).

  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 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 acts on the vent holes 50 and 50, and the vicinity of the tip of the web 44 is near the vent hole 50. , 50. 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 via 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 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.

  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 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 guide member 72 has an upper surface formed in an arc shape, and when the cutting and joining drum 40 rotates and the arc-shaped outer peripheral surface faces the guide member 72, the guide member 72 has an arc shape of the cutting and joining drum 40. It is formed so that it may become fixed gap s1 with respect to the outer peripheral surface. The gap s1 is set to be larger than the gap s2 between the cutting drum 38 and the tip of the guide member 72 (that is, the portion on the inlet side into which the webs 32 and 44 enter). For example, when s2 is 0.5 to 1.5 mm, s1 is set to a range of 1 to 3 mm. Thereby, the cut webs 32 and 44 can be guided to the gap between the guide member 72 and the cutting and joining drum 40, and can be prevented from entering the gap between the guide member 72 and the cutting drum 38.

  Further, the leading end of the guide member 72 has an arcuate portion 72A formed by chamfering the cutting and joining drum 40 side. For this reason, the gap between the cutting and joining drum 40 and the guide member 72 is configured to gradually increase on the inlet side. Thereby, the webs 32 and 44 after cutting can be smoothly guided into the gap between the guide member 72 and the cutting and joining drum 40. The shape of the arc portion 72A is preferably R15 mm or more. By adopting such a shape, the webs 32 and 44 can be reliably prevented from being caught at the tip position of the guide member 72.

  The guide member 72 is made of a material that is not easily deformed, and the surface thereof is coated with a fluororesin or the like. Thereby, the friction coefficient with respect to the webs 32 and 44 is reduced, and the webs 32 and 44 can slide smoothly with respect to the guide member 72. The friction coefficient of the surface of the guide member 72 is preferably Ra = 0.4 μm or less. The guide member 72 preferably has its own weight deflection within 0.1 mm.

  The guide member 72 is supported by a support member 74 as shown in FIG. The support member 74 is formed by bending a metal material into an L shape, and the guide member 72 is connected to a position adjustment mechanism (not shown) via the support member 74. Therefore, the position of the guide member 72 can be adjusted. The support member 74 is formed to have the same width as the joining drum 42 and is disposed so as to block between the joining drum 42 and the cutting drum 38. Thereby, when the air is blown out from the ejection port 61 of the cutting drum 38, the blown air can be prevented from directly hitting the joining drum 42 by the support member 72.

  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. When the end portion of the web 32 appears, the end portion is detected by a sensor, and rotation driving of the cutting drum 38, the cutting joining drum 40, and the joining drum 42 is started based on the detection signal of the sensor.

  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 butt portion can be fed into the gap between the guide member 72 and the cutting and joining drum 40 by injecting air from the outlet 61 of the cutting drum 38. In particular, in the present embodiment, the gap s1 between the cutting and joining drum 40 and the guide member 72 is larger than the gap s2 between the cutting drum 38 and the guide member 72, so the webs 32 and 44 after cutting are on the gap s1 side. Be sure to be guided. Moreover, since the front end 72A of the guide member 72 is formed so that the gap with the cutting and joining drum 40 is gradually narrowed from the inlet side, the webs 32 and 44 can be more reliably fed into the gap. 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). At that time, since the surface of the guide member 72 is coated with a fluororesin, the slidability between the webs 32 and 44 and the guide member 72 is good, and the webs 32 and 44 are in a state in which the butt state is reliably maintained. Is sent to the joining position.

  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. When the joined webs 32 and 44 are sent out to the shock absorber, the cutting and joining drum 40 rotates as shown in FIG. 6, so that the uncut portion 32 </ b> B of the web 32 adsorbed to the cutting and joining drum 40 is peeled off from the web 44. (Peeling step). The remaining cutting portion 32B after peeling is removed by a terminal treatment device (not shown). Instead of removing the remaining cutting portion 32B with the end treatment device, the old roll 24 may be wound around the old roll 24 by rotating it backward.

  As described above, according to the present embodiment, the gap s1 with respect to the cutting and joining drum 40 is larger than the gap s2 with respect to the cutting drum 38, and the gap with the cutting and joining drum 40 is gradually increased at the tip. Therefore, the webs 32 and 44 after cutting can be reliably guided by the guide member 72. Furthermore, since the surface is guided by the guide member 72 coated with fluororesin, the cut webs 32 and 44 can be fed to the joining position while maintaining the end-to-end contact state. Therefore, according to the present embodiment, the webs 32 and 44 can be fed to the joining position with little deviation between the ends, and the webs 32 and 44 can be butt-joined with high quality.

  Further, according to the present embodiment, since the web 44 after cutting is pressed toward the cutting and joining drum 40 side by injecting air from the outlet 61 of the cutting drum 38, the web 44 after cutting is It is possible to more reliably feed the gap between the guide member 72 and the cutting / joining drum 40.

  Furthermore, according to the present embodiment, the support member 74 of the guide member 72 is provided between the cutting drum 38 and the joining drum 42, and the air flow from the jet outlet 61 is blocked by the support member 74. Therefore, it is possible to prevent the joining tape 62 sucked and held on the joining drum 42 from being displaced or peeled off by the jet air. Therefore, since the joining tape 62 can be reliably adhered to the joining position of the webs 32 and 44, the butt joining quality of the webs 32 and 44 can be improved.

  In the above-described embodiment, the fluororesin is coated in order to reduce the friction coefficient between the guide member 72 and the webs 32 and 44. However, any lubricating coating may be used. Further, instead of coating the surface, the guide member 72 may be formed of a material having high lubricity.

  Further, a large number of grooves along the running direction of the webs 32 and 44 may be formed on the surface of the guide member 72 so as to reduce the friction with the running webs 32 and 44.

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 Side view showing shape of guide member

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Web butt joining apparatus, 12 ... Turret apparatus, 14 ... Web cutting | disconnection joining unit, 32 ... Web, 32B ... Cutting remainder, 38 ... Cutting drum, 40 ... Cutting joining drum, 42 ... Joining drum, 44 ... Web, 45 ... Suction port, 72 ... Guide member

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 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;
The belt-like flexible support of the old roll and the belt-like flexible support of the new roll are overlapped by rotating at the same speed as the transport speed of the belt-like flexible support during the joining operation. A pair of cutting drums,
A tape holding section for holding the bonding tape, and a butt portion of the ends of the two band-shaped flexible supports by being driven to rotate at the same speed as the conveyance speed of the band-shaped flexible support during the bonding operation A bonding drum for attaching the bonding tape to
A guide member that guides the butted portions of the end portions of the two belt-like flexible supports to the joining position, and a gap with respect to the cutting drum disposed on the joining position side of the pair of cutting drums is on the inlet side. A guide member provided to gradually increase,
Air jetting means for blowing air to the band-shaped flexible support cut by the pair of cutting drums and pressing the air against the cutting drum disposed on the joining position side of the pair of cutting drums;
A blocking means that is provided between the air injection means and the joining drum and blocks the injection air from the air injection means;
A web butt-joining apparatus comprising: 2. The web butt-joining apparatus according to claim 1 , wherein the guide member is provided such that a gap between the guide member and the one cutting drum is larger than a gap with respect to the other cutting drum. The guide member webs butt joint according to claim 1 or 2, characterized in that the surface is coated with a resin. Said interrupting means, web butt joint device according to any one of claims 1 to 3, characterized in that a supporting member for supporting the guide member. 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;
After the preparation step, the pair of cutting drums and the joining drum are rotationally driven at the same speed as the conveying speed of the band-shaped flexible support, and the pair of cutting drums support the band-shaped flexible support of the old roll. A cutting step of cutting the body and the belt-like flexible support of the new roll in an overlapped state;
In the feeding step of feeding the butt portion of the end portions of the two strip-shaped flexible supports cut in the cutting step to the joining position while holding one of the pair of cutting drums in cooperation with the joining drum. A feeding step of guiding and feeding the butted portion by a guide member provided so that a gap with respect to the cutting drum on the joining position side of the pair of cutting drums gradually increases on the inlet side;
A joining step of adhering the joining tape with the joining drum to the butting portion fed to the joining position;
With
In the sending step,
From the other of the pair of cutting drums, by injecting air by air injection means, the butt portion is pressed against the one cutting drum side and sent to the joining position,
A web butt-joining method, wherein a blocking means provided between the air jetting means and the joining drum is shut off so that the jet air from the air jetting means does not hit the joining drum.

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