JP2017081740A - Web splicing method and web splicing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a web splicing method and a web splicing device that allow splicing of a preceding web to a following web to be performed in a short time and can deal with both butt-splicing and lap-splicing.SOLUTION: A web holding roller 2 is provided below a conveyance path of a preceding web W1, and a cutting unit 5 comprising a cutting blade 50 and a holding body 51 and a pressing/joining roller 6 are provided above the conveyance path. A following web W2 is adsorbed and held so as to cover an upper side of the web holding roller 2, at a position away from the conveyance path, made to approach the conveyance path by moving up the web holding roller 2 and thereafter butt-spliced or lap-spliced to the preceding web W1 by relevant operation of the web holding roller 2, the cutting unit 5, and the pressing/joining roller 6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a web joining method for joining a web such as a laminate sheet in the middle of a conveying path, and a web joining device used for carrying out this method.

  A web such as a laminate sheet is finished into various products through processing steps such as coating and coating. The web is supplied in a state of being wound around a roll, continuously pulled out from the roll, and sent to a processing step through a predetermined conveyance path. At this time, it is necessary to splice the front end of the web (following web) newly drawn from the roll to the end of the web (previous web) being transported first.

  This joining is performed by a procedure in which the conveyance of the preceding web is stopped and the end of the preceding web and the leading end of the succeeding web are joined using a joining tape. Patent Documents 1 and 2 disclose a method and an apparatus that can automatically perform web splicing in the above procedure.

  In the methods disclosed in Patent Documents 1 and 2, the trailing portion of the preceding web is overlapped with the leading portion of the succeeding web, and the overlapping portions are provided on both sides of the transport path with a gap in the front and rear in the transport direction. Unnecessary portions of the rear side of the preceding web and the front side of the succeeding web after the preceding web and the succeeding web are collectively cut by the operation of the cutting blade between the front and rear clamping positions. Is removed, but the cut end is butted and the joining tape held by the tape holding part is pressed to the other side of the butting part while maintaining the holding of the web holding part on one side, and the joining tape is used for joining.

  Further, when double-sided bonding is required, the holding by the web holding portion on one side is released, and the bonding tape held on the same side as the other side is pressed on the same side. This pressing is performed under the support of the tape holding unit while maintaining the pressing of the tape holding unit on the other side. Further, in Patent Document 2, the work of pulling out the leading portion of the succeeding web from the roll and setting it on the corresponding web holding portion is also automated.

Japanese Patent No. 2881646 Japanese Patent No. 4886598

  According to the methods and apparatuses described in Patent Documents 1 and 2, web splicing can be performed automatically. On the other hand, the web holding part and the tape holding part arranged on both sides of the conveyance path need to move toward and away from the conveyance path at positions facing the butting parts of both webs. It is moved to a standby position away from the operating position. In Patent Documents 1 and 2, the web holding unit and the tape holding unit on both sides of the conveyance path are supported by a common support base, and the movement between the operating position and the standby position is performed by moving the support base back and forth or rotating. As a result, there is a problem in that the configuration of the splicing device including the web holding unit and the tape holding unit is complicated, and it takes time to join the webs performed by combining the respective operations.

  In particular, when the web transport destination is a processing process that requires continuous processing, a staying device that retains the web is provided between the splicing device and the transport destination, and stays during splicing work that involves transport pause. Continuous processing is possible by sending the web retained in the equipment to the processing process. However, if time is required for splicing, it is necessary to increase the size of the stagnating equipment and increase the load. Shortening is an important issue.

  In addition, the methods described in Patent Documents 1 and 2 are methods specialized in so-called butted joints in which the leading end of the preceding web and the leading end of the succeeding web are butted, and the processing contents at the transport destination Depending on the processing content at the transport destination, the end portion of the preceding web and the tip portion of the succeeding web are overlapped over an appropriate length, and the overlapping portion is joined using a double-sided adhesive tape, so-called overlap A splice may be required, and there is a strong need for a method and apparatus that can accommodate both a butt splice and a lap splice.

  The present invention has been made in view of such circumstances, and the joining of the preceding web and the succeeding web can be performed in a short time with a simple configuration and operation, and both the butt joint and the lap joint are achieved. It is an object of the present invention to provide a web splicing method and a splicing device that can cope with the above.

  In the web splicing method according to the present invention, the leading edge of the succeeding web is abutted against the end of the preceding web conveyed in the length direction and joined over the entire width, and the joined succeeding web is continuously connected to the preceding web. A first step of adhering and holding a succeeding web to a part of the outer peripheral surface of the web holding roller at a position away from the transport path during transport of the preceding web, A second step in which a web holding roller is brought close to the conveyance path, and a subsequent web held by the web holding roller is brought into contact with a preceding web that has stopped conveying at one location on the outer peripheral surface; and the preceding web and the following web Is held between the web holding roller and the presser roller at the front side in the transport direction with respect to the contact portions of both webs, and the preceding web is held by the holding body at the rear side in the transport direction with respect to the contact portion. 3 steps, the preceding web and the succeeding web that overlap at the abutting part are cut in the width direction by the operation of the cutting blade, the holding by the holding body is released, and the preceding web continuous to the rear side of the cutting position is unnecessary The fourth step of removing the portion and the conveyance of the preceding web are restarted, the web holding roller and the pressing roller are rolled, and the joining tape held on the peripheral surface of the pressing roller is cut into the preceding and following webs. A fifth step of adhering to one surface of the abutting portion of the end, and removing the web holding roller to remove the unnecessary portion of the succeeding web continuous to the front side of the adhering position, and holding the presser roller And a sixth step of feeding the succeeding web joined to the preceding web by the joining tape to the transport path.

  In the present invention, while the preceding web is being conveyed, the succeeding web is attracted and held by the web holding roller, the web holding roller is brought close to the conveying path, and the conveyance of the succeeding web held by the web holding roller is stopped. It is brought into contact with the preceding web. Next, the preceding web and the succeeding web are overlapped and sandwiched between the web holding roller and the pressing roller on the front side of the contact portion, and the preceding web continuous on the rear side of the contact portion is held by the holding body. By the operation of the cutting blade at, the preceding web and the succeeding web that overlap at the contact portion are cut. After this cutting, the conveyance of the preceding web is resumed by removing unnecessary portions that are continuous on the rear side of the cutting position. The presser roller rolls by resuming the conveyance of the preceding web, and when the butt portion of the cut end passes, the bonding tape held on the peripheral surface is attached to the butt portion, and the subsequent web bonded by the bonding tape is attached. It is sent out to the conveyance path continuously to the preceding web. The above procedure includes the movement of the web holding roller to and from the conveyance path on one side of the conveyance path, the movement of the pressing roller, cutting blade, and holding body on the other side, and the web holding roller and presser when the conveyance is resumed. By combining with roller rolling, it can be realized by a simple configuration and operation including removal of unnecessary portions of the preceding web and the succeeding web, and does not require much time. In addition, the preceding web and the succeeding web are cut in a state where the front and rear sides are held on the circumference of the web holding roller. Butt joint is possible.

  In the web splicing method according to the present invention, the web holding roller is rotated by a predetermined angle between the first step and the second step, and the subsequent web adsorbed and held by the web holding roller is conveyed. It is characterized by bending at the rear side of the direction.

  The succeeding web held by the web holding roller comes into contact with the preceding web in a state where the rear portion in the transport direction is bent, and is cut at the contact portion. Since the rear portion of the succeeding web that is joined to the preceding web after cutting reaches the joining position in a bent state, that is, without tension, the misalignment of the abutting portion is prevented and reliable joining is possible. Become.

  In the web joining method according to the present invention, a joining roller for holding a joining tape on a part of the circumferential surface is rolled on the preceding web from the other surface side in front of the pressing roller, and The method further includes a double-sided bonding step of sticking the bonding tape to the other surface of the butt portion during rolling.

  The joining roller rolls into contact with the other surface side of the preceding web when transport is resumed, and a joining tape held on the peripheral surface at the time of rolling contact with the butting portion is attached to the other surface side of the butting portion. Double-sided bonding, in which a bonding tape is attached to both surfaces of the butting portion, can be realized simply by providing a bonding roller.

  The web splicing method according to the present invention is characterized in that the holding body holds the preceding web by suction on one surface.

  The web splicing method according to the present invention is characterized in that the pressing roller holds the joining tape by suction to a peripheral surface.

  The web splicing method according to the present invention is characterized in that the joining roller holds the joining tape by suction to a peripheral surface.

  In these, the holding of the preceding web by the holding body and the holding of the joining tape by the pressing roller and the joining roller can be easily released at an appropriate timing by stopping the suction.

  In the web splicing method according to the present invention, the leading end of the succeeding web is overlapped with the end of the preceding web conveyed in the lengthwise direction and joined over the entire width, and the joined succeeding web is joined to the preceding web. In the splicing method of the web continuously sent to the transport path, a first step of attracting and holding the succeeding web on a part of the outer peripheral surface of the web holding roller at a position away from the transport path during transport of the preceding web. And the subsequent web held by the web holding roller is cut in the width direction at one location on the outer peripheral surface, and unnecessary portions on the front side in the transport direction are removed, while the rear web in the transport direction is cut along the cutting edge. A second step of adhering the double-sided adhesive tape, and the web holding roller is brought close to the conveyance path, and the succeeding web held by the web holding roller is applied to the preceding web that has stopped conveyance at the position of the cutting edge. Touched And a preceding web that is continuous between the web holding roller and the pressing roller and that is continuous to the rear side of the contact portion. The leading web is cut in the width direction at a position away from the abutment portion by a fourth step of holding the holding member by the holding body and a cutting blade operating on the front side of the holding body, and continuously on the rear side of the cutting position. The fifth step of removing the unnecessary portion of the preceding web and the conveyance of the preceding web are restarted, and the preceding web is introduced between the web holding roller and the presser roller by being overlapped with the double-sided bonding tape adhered to the succeeding web. And a sixth step of feeding the succeeding web, which is overlapped and joined to the preceding web by pressing between both rollers, to the conveying path.

  In the present invention, the subsequent web is sucked and held on the outer peripheral surface of the web holding roller, cut at one place in the circumferential direction, the front unnecessary portion is removed, and the double-sided tape along the cutting edge at the rear required portion The pre-processing until sticking is carried out while the preceding web is being transported. Next, the web holding roller is brought close to the conveyance path, and the subsequent web held by the web holding roller is brought into contact with the preceding web that has stopped conveyance at the position of the cutting edge. Next, the preceding web is sandwiched between the web holding roller and the pressing roller on the front side of the abutting portion, and the preceding web continuous on the rear side of the abutting portion is held by the holding body, and the operation of the cutting blade in this state As a result, the preceding web is cut at a position away from the abutting portion, and unnecessary portions of the preceding web continuous on the rear side of the cutting position are removed. After that, the conveyance of the preceding web is resumed, and when passing between the web holding roller and the pressing roller, the overlapping portion of the preceding web and the succeeding web is pressed against each other via the double-sided adhesive tape, and overlapped on the previous web by the double-sided adhesive tape. After that, the succeeding web is sent out to the conveyance path. The above procedure includes the movement of the web holding roller to and from the conveyance path on one side of the conveyance path, the movement of the pressing roller, cutting blade, and holding body on the other side, and the web holding roller and presser when the conveyance is resumed. By combining with the rolling of the roller, it can be realized by a simple configuration and operation including removal of unnecessary portions of the preceding web and the succeeding web, and high-precision lap joint can be realized in a short time.

  In the web splicing method according to the present invention, the web holding roller is rotated by a predetermined angle between the second step and the third step, and the subsequent web adsorbed and held by the web holding roller is conveyed. It is characterized by bending at the rear side of the direction.

  The succeeding web held by the web holding roller bends the rear portion in the conveying direction and comes into contact with the preceding web at the position of the cutting edge. Since the rear portion of the succeeding web overlaps with the preceding web in a bent state, i.e., without tension, the double-sided adhesive tape adhered along the cutting edge does not shift to the preceding web. Overlap and reliable joining is possible.

  In the web splicing method according to the present invention, a joining roller that holds a joining tape on a part of the circumferential surface is rolled to the preceding web in front of the pressing roller, and the cut end of the succeeding web is connected to the joining web. It further includes a cut end processing step of attaching the joining tape across the cut end at the time of rolling.

  When the conveyance is resumed, the joining roller is brought into rolling contact with the lower surface of the preceding web, and the joining tape held by the joining roller is stuck across the cut end of the succeeding web. While strengthening the joining by the double-sided joining tape, it is possible to prevent obstruction of conveyance due to catching of the cut end.

  The web splicing method according to the present invention is characterized in that the holding body holds the preceding web by suction on one surface.

  The web splicing method according to the present invention is characterized in that the joining roller holds the joining tape by suction to a peripheral surface.

  In these, the holding of the preceding web by the holding body and the holding of the joining tape by the joining roller can be easily released at an appropriate timing by stopping the suction.

  The web splicing device according to the present invention is a web splicing device that joins the leading end portion of the succeeding web to the end portion of the preceding web, and continuously feeds the joined succeeding web to the transport path. A web holding roller that is disposed opposite to one side of the conveyance path and attracts and holds the trailing web to a part of the outer peripheral surface and moves toward and away from the conveyance path; It has a cutting blade and a holding body that are juxtaposed and move separately from each other with respect to the conveyance path, and the cutting blade is separated from the front position to the rear side in the conveyance direction from the front position facing the web holding roller. A cutting unit that moves back and forth between the rear position and the web holding roller on the other side of the transport path and on the front side in the transport direction with respect to the web holding roller. Presser foot that moves toward and away from the roller Characterized in that it comprises a chromatography La.

  In the present invention, the web holding roller is moved toward and away from one side of the conveying path, the pressing roller is moved toward and away from the other side of the conveying path, and the cutting blade and the holding are held at the front or rear position on the same side. By combining the body contact / separation movements, web splicing and butt splicing can be realized with high accuracy in a short time.

  Further, the web splicing device according to the present invention is disposed opposite to one side of the conveyance path at a position away from the pressing roller, and holds a bonding tape on a part of the peripheral surface to the conveyance path. The apparatus further comprises a joining roller that moves toward and away, rolls into contact with the preceding web and the following web when approaching, and adheres the joining tape to the rolling position.

  In the present invention, by providing a joining roller that moves toward and away from the conveyance path in front of the pressing roller, it is possible to realize a butt joint by double-sided joining and a lap joint including processing of a cut end.

  According to the web splicing method and the web holding device according to the present invention, the splicing including cutting and joining between the end of the preceding web and the front end of the succeeding web can be performed with high accuracy in a short time with a simple configuration and operation. Can be performed.

It is a side view which shows schematic structure of the joining apparatus which concerns on embodiment. It is a procedure explanatory drawing of the butt joint implemented by the joining apparatus shown in FIG. It is a procedure explanatory drawing of the butt joint implemented by the joining apparatus shown in FIG. It is a procedure explanatory drawing of the butt joint implemented by the joining apparatus shown in FIG. It is a procedure explanatory drawing of the butt joint implemented by the joining apparatus shown in FIG. It is a procedure explanatory drawing of the butt joint implemented by the joining apparatus shown in FIG. It is a procedure explanatory drawing of the butt joint implemented by the joining apparatus shown in FIG. It is a procedure explanatory drawing of the butt joint implemented by the joining apparatus shown in FIG. It is a procedure explanatory drawing of the butt joint implemented by the joining apparatus shown in FIG. It is a procedure explanatory drawing of the butt joint implemented by the joining apparatus shown in FIG. It is a procedure explanatory drawing of the lap joint implemented by the splicing apparatus shown in FIG. It is a procedure explanatory drawing of the lap joint implemented by the splicing apparatus shown in FIG. It is a procedure explanatory drawing of the lap joint implemented by the splicing apparatus shown in FIG. It is a procedure explanatory drawing of the lap joint implemented by the splicing apparatus shown in FIG. It is a procedure explanatory drawing of the lap joint implemented by the splicing apparatus shown in FIG. It is a procedure explanatory drawing of the lap joint implemented by the splicing apparatus shown in FIG. It is a procedure explanatory drawing of the lap joint implemented by the splicing apparatus shown in FIG. It is a procedure explanatory drawing of the lap joint implemented by the splicing apparatus shown in FIG. It is a procedure explanatory drawing of the lap joint implemented by the splicing apparatus shown in FIG. It is an enlarged view of the junction part of a preceding web and a succeeding web.

  Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. FIG. 1 is a side view showing a schematic configuration of a splicing device according to an embodiment. In the following description, upper, lower, left, and right in the figure are used.

  The splicing device includes a web holding roller 2, a joining roller 3, a support roller 4, a cutting unit 5, and a presser joining roller 6, which are described later on a support frame 10 that rises vertically from a substantially horizontal upper surface of the base 1. It is supported as follows.

  The support frame 10 supports the pair of guide rollers 11 and 11 at positions separated in the left-right direction. These guide rollers 11 and 11 are rotatable about different axes perpendicular to the support frame 10 and parallel to each other, and serve to guide the preceding web W1. Two support frames 10 are provided so as to face each other in the front and back direction of the paper surface, and the guide rollers 11 and 11 are horizontally mounted between the opposed surfaces of the two support frames 10 and 10 and supported in a both-side supported state. ing.

  The leading web W1 is supplied from the upper left as shown by the one-dot chain line in FIG. 1, is guided to the upper right through the lower side of the guide rollers 11, 11, and is rotated by a feed roller (not shown) for coating, coating, etc. It is sent to the processing process. In the splicing device, the preceding web W1 is conveyed rightward along a substantially horizontal conveyance path between the left and right guide rollers 11, 11, as indicated by arrows in the drawing.

  An elevating cylinder 70 is fixedly supported at the lower center of the support frame 10 at the approximate center in the left-right direction. The elevating cylinder 70 is an air cylinder that makes a large stroke advance and retreat operation, and the elevating support base 7 is fixed to the upper end of the output rod extending upward. The elevating support 7 extends in the right direction, and fixedly supports elevating cylinders 71 and 72 at the center upper part and the right end.

  The elevating cylinders 71 and 72 are air cylinders having an output rod extending upward and performing a reciprocating operation with a smaller stroke than the elevating cylinder 70. The upper end of the output rod of the central elevating cylinder 71 has the above-described web holding. The roller 2 is supported via the support bracket 20, and the joining roller 3 described above is supported via the support bracket 30 at the upper end of the output rod of the right lifting cylinder 72.

  The web holding roller 2 is a hollow roller supported at a position facing the conveyance path of the preceding web W1 from below. A servo motor (not shown) is driven to rotate around an axis parallel to the left and right guide rollers 11 and 11. The hollow portion of the web holding roller 2 is connected to an intake source (not shown) via an intake pipe 21, and the web holding roller 2 has an adsorption surface on the outer periphery that can adsorb the trailing web W2 by intake air from the intake source. Has in part.

  During the conveyance of the preceding web W1, the web holding roller 2 is at a standby position sufficiently separated below the conveyance path as shown in FIG. 1, and holds the trailing web W2 at this standby position. The trailing web W2 is pulled out from a holding roll (not shown) located at the lower left and covers the upper part of the web holding roller 2 at the standby position as shown by a two-dot chain line in FIG. Set to hang down. At this time, the suction surface of the web holding roller 2 is in the range from the uppermost portion to the right semicircle (the center angle is 90 °), and the succeeding web W2 set is the suction surface of the web holding roller 2. Adsorbed and held on the entire surface.

  Further, the web holding roller 2 includes a single guide groove 22 formed in a part of the suction surface. The guide groove 22 is a narrow concave groove extending over the entire length of the web holding roller 2, and is directed obliquely upward to the right at the standby position shown in FIG. Covered by W2.

  The setting of the succeeding web W2 as described above is an operation performed on the web holding roller 2 at the standby position during the conveyance of the preceding web W1, and is performed with sufficient margin by the operator's manual work. However, it is also possible to automatically perform the drawing including the drawing from the holding roll by a dedicated device as disclosed in Patent Document 2.

  The web holding roller 2 is lifted together with the lift support base 7 by the operation of the lift cylinder 70, moves from the standby position to the preparation position, is further lifted by the operation of the lift cylinder 71, and moves from the preparation position to the operation position. The succeeding web W2 adsorbed and held by the web holding roller 2 is brought close to the transport path of the preceding web W1 by moving to the preparation position, and is moved down to the preceding web W1 that has stopped transporting as described later by moving to the operating position. Overlapping from the side.

  The joining roller 3 is supported so as to be rotatable around an axis parallel to the guide roller 11 at a position facing the lower side of the right guide roller 11. The joining roller 3 is a hollow roller connected to an intake source (not shown), and adsorbs and holds the joining tape 31 on a part of the peripheral surface by the intake air of the intake source.

  During the conveyance of the preceding web W1, the joining roller 3 is at a standby position sufficiently separated below the conveyance path as shown in FIG. The joining tape 31 is set on the suction surface facing the right of the joining roller 3 in the standby position, and is sucked and held on the suction surface. The setting operation of the bonding tape 31 is an operation performed while the preceding web W1 is being transported. Like the setting of the succeeding web W2, it can be surely performed manually by the operator, but is opposed to the suction surface. It is also possible to carry out with an appropriate apparatus provided.

  The joining roller 3 rises together with the web holding roller 2 by the operation of the elevating cylinder 70 and moves to the preparation position, and approaches the conveyance path of the preceding web W1. Further, the joining roller 3 is further raised by the operation of the elevating cylinder 72 and moved to the operating position, and the leading web W1 that has stopped conveyance is sandwiched between the guide roller 11 on the right side as will be described later. Note that the joining roller 3 has a lock mechanism (not shown), and the joining tape 31 is set at the standby position and then moved to the preparation position and the operation position. It is done in a state.

  A lifting cylinder 73 is fixedly supported on the left side of the lifting cylinder 70 at the lower portion of the support frame 10. The elevating cylinder 73 is an air cylinder that moves forward and backward with the same stroke as the elevating cylinder 70, and the above-described support roller is supported via the support bracket 40 on the upper end of the output rod that extends upward.

  The support roller 4 is rotatable around an axis parallel to the guide roller 11 at a position facing the lower side of the left guide roller 11. As shown in FIG. 1, the support roller 4 is in a lower support position sufficiently far below the transport path and supports the left side portion of the succeeding web W2 set on the web holding roller 2 from below as shown in FIG. . The support roller 4 is lifted by the operation of the elevating cylinder 73 while maintaining the support state of the trailing web W2, and moves to the upper support position close to the conveyance path.

  On the other hand, a moving cylinder 83 is fixedly supported on the upper left side of the support frame 10. The moving cylinder 83 is an air cylinder having an output rod extending rightward, and the tip of the output rod of the moving cylinder 83 is connected to a moving table 82 that can move in the left-right direction along the guide rail 81. An elevating cylinder 84 is fixedly supported at the lower portion of the moving table 82. The elevating cylinder 84 is an air cylinder having an output rod extending downward. At the lower end of the output rod of the elevating cylinder 84, the cutting unit 5 described above moves along the conveyance path of the preceding web W1 to the left and right guide rollers 11, 11. It is attached so that it may face from above.

  The cutting unit 5 moves in the left-right direction together with the moving table 82 according to the operation of the moving cylinder 83. The cutting unit 5 moves to the right when performing a butt joint, which will be described later, and reaches the front position shown in FIG. 1, and moves to the left when performing a lap joint, and then moves to the rear position (see FIG. 12). )

  The cutting unit 5 includes a cutting blade 50 on the right side (front side) and a holding body 51 on the left side (rear side). The holding body 51 is, for example, a hollow intake box connected to an intake source (not shown), and has a suction surface covered with a suction pad on the lower surface facing the transport path. The cutting blade 50 includes a cutting blade at a tip extending downward, and is attached to an output end of the cutting cylinder 52. The cutting cylinder 52 is an air cylinder that makes a long stroke advance and retreat operation in a direction orthogonal to the paper surface, and the cutting blade 50 moves across the conveyance path by the operation of the cutting cylinder 52. This movement occurs at a position facing the uppermost portion of the web holding roller 2 when the cutting unit 5 is at the front position, and when the cutting unit 5 is at the rear position, it is separated by a predetermined length to the left of the uppermost portion of the web holding roller 2. Occurs at different positions.

  While the preceding web W1 is being conveyed, the cutting unit 5 is at a standby position separated above the conveying path, as shown in FIG. 1, and is lowered by the operation of the elevating cylinder 84 and moved to the operating position. Due to the movement to the operating position, the holding body 51 comes into contact with the preceding web W1 that has stopped transporting as described later from above, and sucks and holds the preceding web W1 on the suction surface. Note that the holding body 51 may not have a holding function by adsorption.

  Further, the cutting blade 50 reaches the conveying path at a position deviated to one side in the width direction of the preceding web W1 due to the movement to the operation position, and reciprocates at the position so that the preceding web W1 and the succeeding web W2 or the preceding web W1. Only the web W1 is cut as described below.

  A slider 91 supported by upper and lower guide rails 90 is disposed on the upper right side of the support frame 10, and an elevating cylinder 92 is fixedly supported on the lower portion of the slider 91. The elevating cylinder 92 is an air cylinder having an output rod extending obliquely downward to the left, and the presser joining roller 6 described above is supported on the lower end of the output rod of the elevating cylinder 92 via a support bracket 60.

  The presser bonding roller 6 is rotatably supported around an axis parallel to the guide roller 11 at a position facing the conveyance path of the preceding web W1 from above. The presser bonding roller 6 is a hollow roller connected to an intake source (not shown), like the bonding roller 3, and adsorbs and holds the bonding tape 61 on a part of the peripheral surface by the intake air of the intake source.

  During the conveyance of the preceding web W1, the presser bonding roller 6 is in a standby position on the right side of the cutting unit 5 and away from the conveyance path, as shown in FIG. The joining tape 61 is set on the suction surface facing the left side of the presser joining roller 6 in the standby position when performing butt splicing, which will be described later, and is sucked and held on the suction surface. The joining tape 61 is not necessary when carrying out the lap splicing described later, and the press joining roller 6 functions as a press roller.

  The presser bonding roller 6 in the standby position can be pulled out to the near side or the far side of the paper surface by the movement of the slider 91 along the guide rail 90. The above-described setting of the bonding tape 61 is performed with the bonding roller 6 pulled out, and the setting operation can be performed without being bothered by the presence of peripheral components such as the cutting unit 5 close to the suction surface.

  The presser joining roller 6 is moved obliquely to the left by the operation of the elevating cylinder 92 and moved from the standby position to the operating position. This moving direction is a direction toward the center of the web holding roller 2 that has moved to the operating position, and the presser joining roller 6 that has moved to the operating position comes into contact with the upper surface of the preceding web W1 that has stopped conveyance, and the preceding web W1. Is pressed against the peripheral surface of the web holding roller 2 and the preceding web W1 and the succeeding web W2 are vertically stacked between the web holding roller 2 and the web holding roller 2. The presser bonding roller 6 has the same locking mechanism as that of the bonding roller 3. The setting of the bonding tape 61 at the standby position and the subsequent movement to the operation position are performed by the operation of the lock mechanism. It is carried out in a non-rotating state.

  2-10 is explanatory drawing of the procedure of the butt joint performed by the splicing apparatus shown in FIG. The butt joint is the first step shown in FIG. 2, the second step shown in FIGS. 3 to 5, the third step shown in FIG. 6, the fourth step shown in FIGS. 6 and 7, the fifth step shown in FIG. And the 6th process shown in FIG. 9, FIG. 10 is included.

  In these drawings, the positions of the web holding roller 2, the joining roller 3 and the support roller 4 on the lower side of the transport path, and the press joining roller 6 and the cutting unit 5 on the upper side of the transport path are shown in FIG. The right is shown together. Further, in order to make it possible to distinguish the preceding web W1 and the succeeding web W2, the preceding web W1 is indicated by a one-dot chain line and the succeeding web W2 is indicated by a two-dot chain line, as in FIG.

  In FIG. 2, the preceding web W <b> 1 moves to the right along the conveyance path between the guide rollers 11 and 11. The web holding roller 2 and the joining roller 3 are in a standby position separated downward in the conveying path, and the presser joining roller 6 and the cutting unit 5 are in a waiting position separated above the conveying path.

  The succeeding web W2 covers the upper part of the web holding roller 2 at the standby position and is set in a state where it hangs down on the left side for an appropriate length, and is attached to the suction surface provided on the outer periphery of the web holding roller 2 by the suction operation after the setting is completed. Adsorbed and held. When the succeeding web W2 is set, the suction surface of the web holding roller 2 is in the range of the semicircle on the right side from the top as described above, and changes according to the subsequent rotation of the web holding roller 2. In FIG. 2 to FIG. 10, the range of the suction surface at each time point is clearly shown by hatching.

  Further, the bonding roller 3 holds the bonding tape 31 on the suction surface facing right, and the presser bonding roller 6 holds the bonding tape 61 on the suction surface facing left. On the other hand, the support roller 4 is in the lower support position described above, and the left side portion of the succeeding web W2 extending from the holding position by the web holding roller 2 is supported by the support roller 4 from the lower surface side.

  Thereafter, as shown in FIG. 3, the web holding roller 2 and the joining roller 3 are raised by the operation of the elevating cylinder 70 and moved to the preparation position, and the support roller 4 is raised by the operation of the elevating cylinder 73 to be supported upward. Move to position. At this time, the conveyance of the preceding web W1 is continued, and the succeeding web W2 opposes the web holding roller 2 and the supporting roller 4 with a proper distance below the conveyance path of the preceding web W1. Further, the joining roller 3 is opposed to the lower position of the right guide roller 11 at an appropriate distance below the conveyance path.

  After moving to the preparation position, the web holding roller 2 rotates counterclockwise until the formation position of the guide groove 22 is at the top as shown in FIG. The rotation angle of the web holding roller 2 is 65 °, for example, and this rotation angle can be realized with high accuracy by rotation control of a servo motor that drives the web holding roller 2. During this time, the suction of the trailing web W2 by the suction surface is maintained, and the trailing web W2 is bent between the web holding roller 2 and the supporting roller 4 as shown in FIG. Become.

  Next, the conveyance of the preceding web W1 is temporarily stopped, and the web holding roller 2 is raised by the operation of the elevating cylinder 71 and moved to the operation position shown in FIG. The succeeding web W2 held by the web holding roller 2 comes into contact with the lower surface of the preceding web W1 on the conveyance path at the uppermost portion where the guide groove 22 is formed.

  Thereafter, on the lower side of the conveyance path, the joining roller 3 is raised by the operation of the elevating cylinder 72 and moved to the operation position shown in FIG. The preceding web W1 on the conveyance path is sandwiched between the guide roller 11 and the joining roller 3 on the same side at a position separated to the right side of the web holding roller 2.

  On the other hand, on the upper side of the conveyance path, the cutting unit 5 is lowered by the operation of the elevating cylinder 84 and moved to the operation position shown in FIG. At this time, the cutting unit 5 is in the aforementioned front position. The cutting blade 50 provided in the cutting unit 5 is lowered toward the uppermost portion of the web holding roller 2, and the cutting blades at the tip of the cutting blade 50 are the widths of the preceding web W1 and the succeeding web W2 that overlap each other at the uppermost portion. The guide groove 22 is aligned at a position deviated to one side in the direction. The holding body 51 provided in the cutting unit 5 comes into contact with the left side portion of the preceding web W1 extending from the web holding roller 2 from the upper surface, and sucks and holds the preceding web W1 at this position. On the other hand, the left side portion of the trailing web W2 is sucked and held on the suction surface of the web holding roller 2.

  On the upper side of the conveyance path, the presser joining roller 6 is lowered toward the center of the web holding roller 2 by the operation of the elevating cylinder 92 and moved to the operation position shown in FIG. The presser joining roller 6 abuts on the upper surface of the preceding web W1 and presses the preceding web W1 against the circumferential surface of the web holding roller 2 at a position disengaged to the right of the uppermost portion. The web W1 and the succeeding web W2 are stacked one above the other.

  After the above operation is completed, the cutting blade 50 of the cutting unit 5 reciprocates across the conveying path by the operation of the cutting cylinder 52, and cuts the preceding web W1 and the succeeding web W2. The cutting blade 50 reciprocates along the guide groove 22 and the preceding web W1 and the succeeding web W2 to be cut are held on both sides of the guide groove 22 as described above. Accordingly, the leading web W1 and the trailing web W2 are reliably cut by the reciprocating operation of the cutting blade 50 at the uppermost portion of the web holding roller 2 where the guide groove 22 is located.

  After the cutting is completed, the cutting unit 5 releases the suction of the holding body 51, moves up by the operation of the elevating cylinder 84, returns to the standby position as shown in FIG. 7, and the preceding web W1 and the succeeding web W2 that have been cut are The cut end is brought into contact with the uppermost portion of the web holding roller 2. At this time, an unnecessary portion of the preceding web W1 continuous to the left side (rear side) of the cutting position is removed as indicated by an arrow in FIG. 7, for example, by winding on a supply roll.

  The preceding web W1 continuous to the right side (front side) of the cutting position is sandwiched between the press bonding roller 6 and the web holding roller 2 together with the succeeding web W2 together with the same side portion of the succeeding web W2. Further, the succeeding web W <b> 2 continuous to the left side (rear side) of the cutting position is in a state of being sucked and held by the web holding roller 2. Therefore, the butting of the preceding web W1 and the succeeding web W2 is maintained without being displaced even after the unnecessary portion of the preceding web W1 is removed.

  After the removal of the preceding web W1 is completed, the conveyance of the preceding web W1 is resumed, and the presser joining roller 6 and the web holding roller 2 are in the sandwiched state of the preceding web W1 and the succeeding web W2, as indicated by arrows in FIG. Keep rolling. As shown in FIG. 8, the holding position of the bonding tape 61 on the presser bonding roller 6 corresponds to the position of the abutting portion (formation position of the guide groove 22) of the preceding web W1 and the succeeding web W2 on the outer periphery of the web holding roller 2. I'm allowed. Accordingly, the bonding tape 61 is stuck so as to straddle the upper surface of the abutting portion when passing between the press bonding roller 6 and the web holding roller 2, and the preceding web W1 and the succeeding web W2 have the cut ends thereof. Joining is performed in a state of being butted, and joining (butt joining) is completed.

  As described above, the succeeding web W2 continuous to the left of the cutting position is bent between the web holding roller 2 and the support roller 4 and is held without tension. Therefore, the cutting position of the succeeding web W2 reaches the sticking position of the joining tape 61 without being displaced by the action of the tension applied to the left, and the joining of the preceding web W1 and the succeeding web W2 by the joining tape 61 is as follows. It is done reliably with high accuracy.

  After completion of the butt joint, the left side portion of the succeeding web W2 is continuously conveyed to the preceding web W1, as shown in FIG. 9, while the unnecessary portion of the succeeding web W2 is continued to the right side (front side) of the cutting position. For example, when the suction by the web holding roller 2 is released when the suction surface faces rightward, it is naturally dropped and removed as indicated by an arrow in FIG.

  The butt joint as described above stops the conveyance of the preceding web W1 after the setting operation of the succeeding web W2 as described above and the movement to the preparation position, and stops the web holding roller 2, the cutting unit 5 and the presser joining roller. 6 are operated in association with each other.

  The above-described preparation operation is performed during the conveyance of the preceding web W1, and the operations of the web holding roller 2, the cutting unit 5, and the presser bonding roller 6 after the conveyance stop are brought into contact with and separated from the conveyance path at respective positions. It is a simple operation. Accordingly, the butt joint between the preceding web W1 and the succeeding web W2 can be performed with high accuracy in a short time with a simple configuration and operation, and the conveyance pause time is minimized and provided between the conveyance destination and the web. It is possible to reduce the size and load of the staying device.

  When the conveyance is resumed, the joining roller 3 is in rolling contact with the lower surface of the preceding web W1 at a position distant to the right of the joining portion. This joining roller 3 is shown in FIG. 9 as the preceding web W1 is resumed. Rotate clockwise as indicated by the arrow. The holding position of the joining tape 31 on the circumference of the joining roller 3 is set so as to correspond to the joining portion of the preceding web W1 and the succeeding web W2, and the joining tape 31 is moved by the rolling contact of the joining roller 3. It is stuck to the joint from the opposite side of the upper joint tape 61.

  The presser joining roller 2 and the joining roller 3 are lowered by the operation of the lifting cylinders 70, 71, 72 after the joining of the joining tape 31 is completed, and the presser joining roller 6 is raised by the operation of the lifting cylinder 92, respectively. Return to the standby position. Further, the support roller 4 supporting the left side of the trailing web W2 is lowered by the operation of the elevating cylinder 73 and returns to the lower support position. At this time, the succeeding web W2 supported by the support roller 4 moves to the upper guide roller 11 by moving the holding roll located at the lower left, for example, and moves between the left and right guide rollers 11, 11. As a result, the initial state shown in FIG. 2 is realized as shown in FIG. 10 by replacing the preceding web W1 with the succeeding web W2, and the succeeding web W2 is formed from both sides by the joining tapes 31, 61. It is conveyed in a state where it is firmly bonded to the preceding web W1, and is sent out to processing steps such as coating and coating.

  If double-sided bonding is not necessary, the setting of the bonding tape 31 may be omitted in the preparation state shown in FIG. 2, and according to the splicing device of the embodiment, butt splicing by single-sided bonding and double-sided bonding is selected. Can be implemented.

  Furthermore, according to the splicing device shown in FIG. 1, lap splicing can be performed by the following procedure. FIGS. 11-19 is explanatory drawing of the procedure of the lap joint implemented by the splicing apparatus shown in FIG. The first and second processes shown in FIG. 11, the third process shown in FIGS. 12 to 14, the fourth process shown in FIG. 15, the fifth process shown in FIGS. 15 and 16, and FIGS. Including the sixth step shown in FIG.

  2 to 10, the positions of the web holding roller 2, the bonding roller 3 and the support roller 4 on the lower side of the conveyance path, and the cutting unit 5 and the presser bonding roller 6 on the upper side of the conveyance path are illustrated. 1 and the top, bottom, left and right are shown together.

  FIG. 11 shows the set state of the trailing web W2. The succeeding web W2 is set in the same manner as in the case of the butt joint shown in FIG. 2, but in the case of the lap joint, the succeeding web W2 held by the web holding roller is set to black in FIG. As indicated by the coating arrows, the sheet is cut in advance at the position of the guide groove 22, and the double-sided bonding tape 9 is adhered to the upper surface of the subsequent web W2 after cutting along the left side of the cutting edge, and the right side of the cutting position. Pre-processing for removing unnecessary portions is performed. Cutting the trailing web W2, attaching the double-sided bonding tape 9, and removing unnecessary parts after cutting can be performed manually by the operator, but a dedicated device is provided at the corresponding position and the operation is performed by the device. May be.

  In the case of lap jointing, the bonding tape 31 is held by the bonding roller 3 by suction. However, the holding and holding of the bonding tape 61 to the press bonding roller 6 is not necessary, and the press bonding roller 6 functions as a pressing roller. It's just an eggplant.

  After completion of the above pretreatment, the web holding roller 2 and the joining roller 3 are moved up to the preparation position shown in FIG. 12 by the operation of the lifting cylinder 70, and the support roller 4 is lifted by the operation of the lifting cylinder 73. Move to the upper support position. At this time, the conveyance of the preceding web W1 is continued, and the succeeding web W2 opposes the web holding roller 2 and the supporting roller 4 with a proper distance below the conveyance path of the preceding web W1. Further, the joining roller 3 is opposed to the lower position of the right guide roller 11 at an appropriate distance below the conveyance path.

  On the other hand, on the upper side of the conveyance path, the cutting unit 5 moves to the rear position described above by the operation of the moving cylinder 83. After the cutting unit 5 is moved, the cutting blade 50 of the cutting unit 5 faces the upper part of the conveying path at a position that is a predetermined distance away from the uppermost part of the web holding roller 2 to the left side.

  After the movement to the preparation position, the web holding roller 2 rotates counterclockwise until the position where the guide groove 22 is formed, that is, the cut end of the succeeding web W2 faces the top as shown in FIG. At this time, the sticking part of the double-sided bonding tape 9 is located on the left side of the uppermost position. The suction state of the web holding roller 2 is maintained, and the trailing web W2 is bent between the web holding roller 2 and the support roller 4 as shown in FIG. 13 and held without tension.

  Subsequently, the conveyance of the preceding web W1 is stopped, and the web holding roller 2 is raised by the operation of the elevating cylinder 71 and moved to the operating position. As shown in FIG. 14, the web holding roller 2 is brought into rolling contact with the lower surface of the preceding web W1 on the conveyance path at the uppermost portion where the guide groove 22 is formed, and the sticking portion of the double-sided bonding tape 9 is on the left side of the rolling contact position. It is located in succession.

  Thereafter, on the lower side of the conveyance path, the joining roller 3 is moved up to the operating position by the operation of the lifting cylinder 72. As shown in FIG. 15, the preceding web W <b> 1 on the conveyance path is sandwiched between the joining roller 3 and the guide roller 11 on the same side at a position separated to the right side of the web holding roller 2.

  On the other hand, on the upper side of the conveyance path, the cutting unit 5 is lowered by the operation of the elevating cylinder 84 and moved to the operation position shown in FIG. At this time, the cutting unit 5 has moved to the rear position as described above, and the cutting blade 50 of the cutting unit 5 descends to a position deviated to the left from the top of the web holding roller 2 and The cutting blade crosses the conveyance path on one side in the width direction of the preceding web W1. The holding body 51 provided in the cutting unit 5 abuts the preceding web W1 from the upper surface on the front side of the cutting blade 50, and sucks and holds the preceding web W1 at this position.

  On the upper side of the conveyance path, the presser joining roller 6 is lowered toward the center of the web holding roller 2 by the operation of the elevating cylinder 92 and moved to the operation position shown in FIG. The presser joining roller 6 abuts on the upper surface of the preceding web W1, presses the preceding web W1 against the peripheral surface of the web holding roller 2 at a position disengaged to the right of the uppermost portion, and is sandwiched between the web holding roller 2 To do.

  After the above operation is completed, the cutting blade 50 of the cutting unit 5 reciprocates across the conveyance path by the operation of the cutting cylinder 52. By this operation, the preceding web W1 is cut leaving an end portion of an appropriate length between the upper end of the web holding roller 2 where the cutting end of the succeeding web W2 is located. At this time, the preceding web W1 is adsorbed and held by the holding body 51 on the left side of the cutting position, and is sandwiched between the press-bonding roller 6 and the web holding roller 2 on the right side. Disconnected. The succeeding web W2 is sucked and held on the sucking surface of the web holding roller 2, is located below the cutting blade 50, and is not cut by the operation of the cutting blade 50.

  After the cutting of the preceding web W1, the cutting unit 5 is raised by the operation of the lifting cylinder 84 and returns to the standby position shown in FIG. As shown by an arrow in FIG. 16, for example, the unnecessary portion of the preceding web W <b> 1 continuous to the left side (rear side) of the cutting position is released from the holding body 51 and then wound on a supply roll. Removed.

  After the removal of the preceding web W1 is completed, the conveyance of the preceding web W1 is resumed, and the presser joining roller 6 and the web holding roller 2 roll in the direction indicated by the arrow in FIG. 17 while maintaining the sandwiched state of the preceding web W1. To do. The end portion of the preceding web W1 remaining on the right side of the cutting position overlaps with the position where the double-sided bonding tape 9 is attached and passes between the presser bonding roller 6 and the web holding roller 2 and is pressed against the double-sided bonding tape 9 during this passage. It is done. Accordingly, the preceding web W1 and the succeeding web W2 are firmly joined by the double-sided joining tape 9 interposed in the overlapping portion and fed out between the presser joining roller 6 and the web holding roller 2, and the joining (lap joining) is completed. To do.

  The preceding web W1 is sandwiched by the joining roller 3 and the guide roller 11 on the right side of the sandwiching position by the press joining roller 6 and the web holding roller 2, and the succeeding web W2 continuous to the left side of the cutting position is a butt joint. As in the case, the web holding roller 2 and the supporting roller 4 are held without tension. Accordingly, the preceding web W1 and the succeeding web W2 reach the pressing position of the double-sided bonding tape 9 without any positional deviation of the cut ends, and the joining of the preceding web W1 and the succeeding web W2 by the double-sided joining tape 9 is high. It is done reliably with accuracy.

  The lap joint as described above stops the conveyance of the preceding web W1 after the pretreatment including setting the succeeding web W2, cutting and attaching the double-sided tape 9, and moving to the preparation position. This is realized by operating the holding roller 2, the cutting unit 5, and the presser bonding roller 6 in association with each other.

  The above-described preparation operation is performed during the conveyance of the preceding web W1, and the operations of the web holding roller 2, the cutting unit 5, and the presser bonding roller 6 after the conveyance stop are brought into contact with and separated from the conveyance path at respective positions. It is a simple operation. Accordingly, it is possible to perform the splicing of the preceding web W1 and the succeeding web W2 with a simple configuration and operation, minimizing the conveyance pause time, and reducing the size of the staying device provided between the conveyance destination and the conveyance destination. In addition, the load can be reduced.

  As described above, according to the joining device shown in FIG. 1, both the butt joint and the lap joint can be handled by changing the operation procedure.

  FIG. 18 shows a state after resumption of conveyance. The joining roller 3 is in rolling contact with the lower surface of the preceding web W1 at a position separated to the right of the joining portion of the succeeding web W2. The joining roller 3 rotates counterclockwise as indicated by an arrow in the drawing along with the movement of the preceding web W1 after resumption of conveyance, and the cutting edge of the succeeding web W2 joined to the preceding web W1 is It passes through the rolling contact position of the joining roller 31 continuously with the preceding web W1. The joining roller 3 holds the joining tape 31 on its outer peripheral surface, and this holding position is set so as to correspond to the cutting edge of the trailing web W2, as shown in FIG. Thereby, the joining tape 31 is stuck on the lower surfaces of the preceding web W1 and the succeeding web W2 so as to straddle the cut edge when the cut edge of the succeeding web W2 passes.

  The presser joining roller 2 and the joining roller 3 are lowered by the operation of the lifting cylinders 70, 71, 72 after the joining of the joining tape 31 is completed, and the presser joining roller 6 is lifted by the operation of the lifting cylinder 92, respectively. Return to the standby position. Further, the support roller 4 supporting the left side of the trailing web W2 is lowered by the operation of the elevating cylinder 73 and returns to the lower support position. At this time, the succeeding web W2 supported by the support roller 4 moves to the upper guide roller 11 by moving the holding roll located at the lower left, for example, and moves between the left and right guide rollers 11, 11. Thus, the initial state shown in FIG. 11 is realized as shown in FIG. 19 by replacing the preceding web W1 with the succeeding web W2, and the succeeding web W2 is composed of the double-sided joining tape 9 and the joining tape 31. Is conveyed in a state of being joined to the preceding web W1 and sent out to processing steps such as coating and coating.

  In addition, you may abbreviate | omit sticking with the joining tape 31, and the set of the joining tape 31 is unnecessary in the preparation state shown in FIG. On the other hand, the use of the bonding tape 31 has the following advantages. 20 is an enlarged view of the joining portion of the preceding web W1 and the succeeding web W2, FIG. 20A shows a case where the joining tape 31 is not used, and FIG. 20B shows a case where the joining tape 31 is used. .

  As described above, since the double-sided tape 9 is attached by manual work after cutting the succeeding web W2, the cut end of the succeeding web W2 is located on the left side of the joint portion by the double-sided tape 9, as shown in FIG. 20A. May protrude slightly. This protruding end faces the downstream side (front side) of the conveying direction indicated by the white arrow in the figure, and the protruding end is caught in the middle of the conveying path or in the processing process of the conveying destination, which hinders conveyance and processing. The problem of coming will occur.

  As shown by a two-dot chain line in FIG. 20A, the joining tape 31 is stuck so as to straddle the cut end of the succeeding web W2. Therefore, when the joining tape 31 is used, as shown in FIG. 20B, the cut end of the succeeding web W2 protruding from the joining portion by the double-sided tape 9 is covered with the joining tape 31, thereby avoiding the above-mentioned problem. be able to.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

2 Web Holding Roller 3 Bonding Roller 4 Supporting Roller 5 Cutting Unit 6 Presser Bonding Roller (Presser Roller)
9 Double-sided bonding tape 31 Bonding tape 50 Cutting blade 51 Holding body 61 Bonding tape W1 Advance web W2 Follow-up web

In addition, the methods described in Patent Documents 1 and 2 are joints in which the end of the leading web and the leading edge of the succeeding web are butted and joined, so-called so-called butted seams. some processing contents, superimposed over a distal portion of the trailing web a distal portion of previous line web to an appropriate length, seaming of joining using overlapping the double-sided adhesive tape portion, so-called, if the splice is necessary Therefore, it is desired to realize a method and an apparatus that can cope with both a butt joint and a lap joint.

In the web splicing method according to the present invention, the leading end of the succeeding web is overlapped with the end of the preceding web conveyed in the lengthwise direction and joined over the entire width, and the joined succeeding web is made into the preceding web. A first step of adhering and holding the succeeding web to a part of the outer peripheral surface of the web holding roller at a position away from the transport path during transport of the preceding web in the method of joining the webs continuously sent to the transport path; The succeeding web held by the web retaining roller is cut in the width direction at one place on the outer peripheral surface, and unnecessary portions on the front side in the transport direction are removed, while the succeeding web on the rear side in the transport direction is cut along the cutting edge. A second step of adhering a double-sided adhesive tape, and bringing the web holding roller closer to the conveyance path and contacting the preceding web held by the web holding roller at the position of the cutting edge with the preceding web that has stopped conveyance Make 3 steps, the preceding web continuous on the front side of the contact portion of the preceding web and the succeeding web is sandwiched between the web holding roller and the pressing roller, and the preceding web continuous on the rear side of the contact portion is held. The leading web is cut in the width direction at a position away from the abutting portion by the fourth step held by the body and the cutting blade operating on the front side of the holding body, and the leading web continuous to the rear side of the cutting position. A fifth step of removing unnecessary portions of the web, and the conveyance of the preceding web is restarted, and the preceding web is introduced between the web holding roller and the pressing roller by being overlapped with the double-sided bonding tape attached to the succeeding web, And a sixth step of feeding the succeeding web, which is overlapped and joined to the preceding web by pressing between both rollers, to the transport path.

In the web splicing method according to the present invention, a joining roller that holds a joining tape on a part of the circumferential surface is rolled to the preceding web in front of the pressing roller, and the cut end of the succeeding web is connected to the joining web. during the rolling, and further comprising a cutting edge treatment step of attaching the splicing tape across the cut end.

The succeeding web W2 covers the upper part of the web holding roller 2 at the standby position and is set in a state where it hangs down to the right side for an appropriate length. Adsorbed and held. When the succeeding web W2 is set, the suction surface of the web holding roller 2 is in the range of the semicircle on the right side from the top as described above, and changes according to the subsequent rotation of the web holding roller 2. In FIG. 2 to FIG. 10, the range of the suction surface at each time point is clearly shown by hatching.

Prior webs W1 consecutive to the right side (front side) of the cutting position, together with the side portions of the trailing web W2, which is sandwiched between the presser joining roller 6 and the web holding roller 2. Further, the succeeding web W <b> 2 continuous to the left side (rear side) of the cutting position is in a state of being sucked and held by the web holding roller 2. Therefore, the butting of the preceding web W1 and the succeeding web W2 is maintained without being displaced even after the unnecessary portion of the preceding web W1 is removed.

Claims (13)

In a web splicing method in which the leading end of a succeeding web is abutted against the end of the preceding web conveyed in the length direction and joined over the entire width, and the joined succeeding web is continuously sent to the conveying path on the preceding web. ,
A first step of attracting and holding the succeeding web to a part of the outer peripheral surface of the web holding roller at a position away from the transport path during transport of the preceding web;
A second step of bringing the web holding roller closer to the conveyance path and bringing a subsequent web held by the web holding roller into contact with a preceding web that has stopped conveyance at one place on the outer peripheral surface;
The preceding web and the succeeding web are sandwiched between the web holding roller and the pressing roller on the front side in the transport direction from the contact portions of both webs, and the preceding web is held by the holding body on the rear side in the transport direction from the contact portion. A third step of holding
The preceding web and the succeeding web that overlap at the contact portion are cut in the width direction by the operation of the cutting blade, the holding by the holding body is released, and the unnecessary portion of the preceding web that continues to the rear side of the cutting position is removed. A fourth step;
The conveyance of the preceding web is resumed, the web holding roller and the pressing roller are rolled, and the joining tape held on the circumferential surface of the pressing roller is adhered to one surface of the abutting portion of the cutting end of the preceding web and the succeeding web. And a fifth step to
The web holding roller is released to remove the unnecessary portion of the succeeding web that is continuous to the front side of the sticking position, and the holding roller is released and the web is joined to the preceding web by the joining tape. And a sixth step of feeding the web to the transport path.   The web holding roller is rotated by a predetermined angle between the first step and the second step, and the subsequent web adsorbed and held by the web holding roller is bent on the rear side in the conveying direction. The web splicing method according to claim 1.   A joining roller holding a joining tape on a part of the peripheral surface is brought into rolling contact with the preceding web from the other surface side in front of the pressing roller, and the other surface of the butted portion is brought into contact with the other surface when rolling with the butted portion. The web splicing method according to claim 1 or 2, further comprising a double-sided bonding step of adhering a bonding tape.   The web joining method according to any one of claims 1 to 3, wherein the holding body holds the preceding web by suction onto one surface.   5. The web splicing method according to claim 1, wherein the pressing roller holds the joining tape by suction to a peripheral surface. 6.   The web splicing method according to claim 3, wherein the joining roller holds the joining tape by suction to a peripheral surface. The leading end of the succeeding web is overlapped with the end of the preceding web conveyed in the lengthwise direction and joined over the entire width, and the joined web is continuously joined to the preceding web and sent to the transport path. In the method
A first step of attracting and holding the succeeding web to a part of the outer peripheral surface of the web holding roller at a position away from the transport path during transport of the preceding web;
The succeeding web held by the web holding roller is cut in the width direction at one location on the outer peripheral surface, and unnecessary portions on the front side in the transport direction are removed, while the rear web in the transport direction is double-sided along the cutting edge. A second step of attaching the bonding tape;
A third step of bringing the web holding roller closer to the conveyance path and bringing the subsequent web held by the web holding roller into contact with the preceding web that has stopped conveyance at the position of the cutting edge;
The preceding web continuous on the front side of the abutting portion of the preceding web and the succeeding web is sandwiched between the web holding roller and the pressing roller, and the preceding web continuous on the rear side of the abutting portion is held by the holding body. A fourth step;
A cutting blade that operates on the front side of the presser body cuts the preceding web in the width direction at a position away from the abutting portion, and removes an unnecessary portion of the preceding web that continues to the rear side of the cutting position. Process,
The conveyance of the preceding web is resumed, and the preceding web is overlapped on the double-sided bonding tape adhered to the succeeding web and introduced between the web holding roller and the pressing roller, and is superimposed on the preceding web by pressing between both rollers. And a sixth step of feeding the joined succeeding web to the transport path.   The web holding roller is rotated by a predetermined angle between the second step and the third step, and the subsequent web adsorbed and held by the web holding roller is bent on the rear side in the transport direction. The web splicing method according to claim 7.   A joining roller that holds a joining tape on a part of the peripheral surface is brought into rolling contact with the preceding web on the front side of the presser roller, and when joining with the cutting end of the succeeding web, the joining roller is straddled across the cutting end. 9. The web splicing method according to claim 7 or 8, further comprising a cutting edge processing step of attaching a tape.   The web joining method according to any one of claims 7 to 9, wherein the holding body holds the preceding web by suction onto one surface.   10. The web splicing method according to claim 9, wherein the joining roller holds the joining tape by suction to a peripheral surface. In the splicing device of the web that joins the leading end portion of the succeeding web to the end portion of the preceding web, and sends the joined succeeding web to the transport path continuously to the preceding web.
A web holding roller that is disposed opposite to one side of the conveyance path and sucks and holds the trailing web on a part of the outer peripheral surface and moves toward and away from the conveyance path;
A cutting blade and a holding body that are arranged side by side on the other side of the transport path in front and back in the transport direction and move separately from and apart from the transport path, the front position where the cutting blade faces the web holding roller; A cutting unit that moves back and forth between the front position and the rear position away from the rear side in the transport direction;
A pressing roller that is disposed on the other side of the conveying path in front of the web holding roller and that holds the joining tape on a part of the peripheral surface and moves toward and away from the web holding roller. A web splicing device.   Oppositely arranged on one side of the conveyance path at a position away from the presser roller, and holding a bonding tape on a part of the peripheral surface, moving toward and away from the conveyance path, and when approaching, the preceding web and The web splicing device according to claim 12, further comprising a joining roller that rolls onto a succeeding web and attaches the joining tape to a rolling position.

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