JP4415312B2 - New and old web joining structure, joining apparatus and heat treatment method - Google Patents

Description

  The present invention relates to an improvement in a structure for joining the new and old webs by stitching the overlapping regions on the start end side of the new web and the terminal end side of the old web, a joining apparatus, and a method for heat-treating the old and new webs joined at the stitching portion. In particular, it is suitable for a two-layer flexible sheet having one surface formed of a polyimide resin film and the other surface formed of a conductive film such as a copper film.

Conventionally, the old and new webs that stitch together the overlapping areas on the starting end side of the new web and the terminal end side of the old web in order to securely connect the old and new webs of electrode substrates made of non-metallic materials that cannot be used for bonding such as welding. A joint structure has been proposed (Patent Document 1). The joining structure of the old and new webs to be sewn can be applied to other than the electrode base material web.
JP 2001-39593 A

However, the new and old web joining structure simply stitched as shown in FIG. 8 has the following problems.
(1) The portion Ab from the stitching portion S to the start end Aa of the new web A and the portion Bb from the stitching portion S to the end Ba of the old web B can swing freely with the stitching portion S as the swing center. It becomes a movable area. These swingable regions Ab and Bb are swung by the flow of air generated on the surfaces of the old and new webs A and B during traveling, and by the hot air blown on the surfaces of the old and new webs A and B passing through the hot-air heat treatment apparatus D. It may move and cause a crack in the seam of the stitched portion S. The crack generated in the seam of the stitched portion S may be expanded by the web tension along the running direction of the old and new webs A and B, and eventually the joint portion may be cut.

(2) When the old and new webs A and B are heat-treated, they may be passed through a hot air heat treatment apparatus D having a high degree of cleanliness so that fine dust does not adhere to the webs. For example, in the case of a two-layer flexible sheet in which each web is formed of a conductive film such as a copper film on one side and a polyimide resin film on the other side, if fine dust adheres to the surface of the conductive film, it becomes a defective product. Pass through high-temperature hot-air heat treatment equipment. However, when using a twisted fiber as the thread Sa for stitching, the fluff of the fiber generated on the surface of the thread is peeled off by the hot air blown and drifts in the hot air heat treatment apparatus D, thus significantly reducing the cleanliness. I will let you. In particular, when the swingable areas Ab and Bb swing, the vibration is transmitted to the yarn Sa to promote fluff peeling from the yarn surface. Problems due to fluff peeling from the suture thread Sa also occur when the web passes through the coating device.

  In order to solve the above problems, the present invention provides a new and old web joint structure that makes it difficult to cut the joint and does not peel off the fluff of the suture thread, a connection device and a heat treatment method for easily obtaining this joint structure. It is to provide.

In order to make it difficult to cut the joint portion of the new and old webs and to prevent the fluff of the suture thread from being peeled off, the means adopted by the present invention according to claim 1 sews the overlapping regions on the start side of the new web and the end side of the old web. in the structure for joining the old and new web in the stapling portion, and a new web on the bonding to the fresh web side sewing portion covering tape suture exposure preventing covering the suture portion, preventing the suture exposed for covering sutures joined to the old web use the old web side sewing portion covering tape, the new web start edge and the new web of the new web start cover tape for rocking motion preventing covering the starting end joined straddling the expiring web, the expiring web of the terminal edge and the new An old-and-new web end covering tape for preventing rocking that is joined across the web and covers the end of the old web is provided.

  In this invention of Claim 1, the part from the stitching | suture part of a new web to a start end is joined by joining the start end edge of a new web and an old web with a new web start end covering tape, and covering the start end of a new web. It can be prevented from swinging, and the old web end covering tape is joined to the end edge of the old web and the new web to cover the end of the old web, so that the part from the stitched part to the end of the old web is not swung. Furthermore, by covering the stitched portions of the new and old webs with the new web starting end covering tape and the old web side stitched portion covering tape, the suture thread can be prevented from being exposed on the surface side of the new and old webs.

  The means adopted by the present invention according to claim 2 for applying to a new and old web made of a two-layer flexible sheet is that the new web and the old web are formed of one side with a conductive film and the other side with a polyimide resin film. The new and old web joining structure according to claim 1.

  In the present invention according to claim 2, the new web and the old web made of a two-layer flexible sheet having one surface made of a conductive film and the other surface made of a polyimide-based resin film, a portion from the stitched portion to the start end of the new web and the old web It is possible to prevent the portion from the stitching portion to the terminal end from being swung, and to prevent the suture thread from being exposed on the surface side of the new and old webs.

  The means adopted by the present invention according to claim 3 to make it easy to obtain a new and old web joint that makes it difficult to cut the joint and does not peel off the fluff of the suture thread. A suturing / cutting device for stitching a superposed region where the start end side of the new web is overlapped with the old web and cutting the end side of the old web, and a superposition disposed on the downstream side of the suturing / cutting device of the web running path An old and new web joining apparatus comprising a one-tape attaching work panel capable of supporting one surface of an area and an other tape-attaching work board capable of supporting the other surface of a polymerization area.

  In this invention of Claim 3, while being able to affix a new web side stitching part covering tape and a new web starting end covering tape to the superposition | polymerization area | region of the new and old web currently supported by the tape affixing work panel, the other The old web-side stitched portion covering tape and the old web end covering tape can be adhered to the overlapping region of the old and new webs supported by the tape application work board.

  The means employed by the present invention according to claim 4 to enable smooth passage of the joints of the old and new webs through the heat treatment apparatus and to maintain the cleanliness within the heat treatment apparatus is as set forth in claim 1 or 2. This is a heat treatment method for old and new webs in which the old and new webs joined by the new and old web joining structure are run and passed through the heat treatment apparatus, and hot air is blown to the new and old webs in the heat treatment apparatus.

  In the present invention according to claim 4, the portion from the stitching portion to the start end of the new web and the portion from the stitching portion to the end of the old web can swing even when hot air is blown. The hot air does not come into contact with the suture thread on the surface side of the new and old webs.

  The new and old web joining structure according to the first aspect of the present invention can make it difficult to cut the joining part of the old and new webs without causing a swinging part in the old and new webs, and expose the suture on the surface side of the old and new webs. This prevents the fluff of the suture thread from peeling off.

  The new and old web joining structure according to the present invention as claimed in claim 2 is a new and old web consisting of a two-layer flexible sheet made of a conductive film and a polyimide resin film so as not to cause a swinging part of the old and new webs. It is possible to make it difficult to cut the portion and to prevent the fluff of the suture from peeling off by not exposing the suture on the surface side of the new and old webs.

The apparatus for joining old and new webs according to the present invention as claimed in claim 3 is to attach each covering tape to the superposed area of the old and new webs supported by the one tape sticking work panel and the other tape sticking work board. In addition, it is possible to easily obtain the joining structure of the old and new webs so as to make it difficult to cut the joining part of the old and new webs without causing a swinging part in the old and new webs and to prevent the fluff of the suture thread from being peeled off.

  The heat treatment method for old and new webs according to the present invention as set forth in claim 4 is a method for sewing a portion from the stitching portion to the start end of the new web and stitching the old web even if hot air is blown to the joint portion of the old and new web passing through the heat treatment apparatus. The part from the part to the end can pass smoothly without swinging (fluttering), and hot air does not contact the suture thread on the surface side of the new and old webs, causing a reduction in cleanliness. It is possible to maintain the cleanliness in the heat treatment apparatus without peeling off the fluff of the suture thread.

  Hereinafter, an old and new web joining structure according to the present invention (hereinafter referred to as “the present invention joining structure”), an old and new web joining apparatus (hereinafter referred to as “the present invention joining apparatus”), and an old and new web heat treatment method (hereinafter referred to as “the present invention joining structure”). The “heat treatment method of the present invention” will be described based on the embodiment shown in the drawings.

1A and 1B show an embodiment of the joint structure of the present invention, in which FIG. 1A is a plan view, FIG. 1B is a right side view, and FIG. 1C is a right side view in a state where tapes T1 to T4 are separated. It is. The joining structure 1 of the present embodiment of the present embodiment joins the new and old webs A and B at the stitched portion S where the overlapping region E on the starting end side of the new web A and the terminal end side of the old web B is stitched. A new suture side covering tape T1 for preventing suture exposure that covers the stitched portion S by joining to A, and an old web side stitching portion covering tape T2 for preventing exposure of the suture that covers the stitched portion S by joining to the old web B. And a new web start end covering tape T3 for preventing shaking to cover the start end Aa of the new web A and the start end edge Aa of the new web A. An old web end covering tape T4 for preventing rocking is provided which covers the end Ba of the old web B by joining over A. The new web side stitching portion covering tape T1 and the old web side stitching portion covering tape T2 are provided with projecting portions T1a and T2a projecting outward from the left and right ends Ea and Ea of the overlapping region E, and the adhesive surfaces of the projecting portions T1a and T2a are provided. Is attached so that the suture thread Sa protruding outward from the left and right ends Ea, Ea of the overlapping region E is sandwiched between the protruding portions T1a, T2a.

  The new web A and the old web B are a flexible plastic film formed in a sheet shape extending in the front-rear direction, a metal foil, a laminate of the plastic film and the metal foil with an adhesive, or a plastic liquid on the metal foil. A flexible sheet or the like formed by coating and curing to form a resin film is selected. When a two-layer flexible sheet for electric wiring or the like is used as the new web A and the old web B, a flexible conductive film made of copper foil (for example, a film thickness of 12 to 18 μm) and the surface of the conductive film A film formed of two layers of a flexible polyimide resin film (for example, a film thickness of 25 to 35 μm) obtained by applying a polyimide varnish to the film and drying and curing it is used.

  The stitching portion S is provided in the entire width W that crosses the overlapping region E of the old and new webs A and B along the left-right direction. The stitched portion S is stitched with an upper thread and a lower thread, or stitched with a single thread, and extends in a straight line along the left-right direction. The stitching portion S is provided with one or a plurality of straight strips (not shown) according to the specifications of the new web A and the old web B so as to obtain a predetermined bonding strength. For the upper thread and the lower thread, those made of polyester fiber or carbon fiber, or those made of Kepler fiber or thin stainless steel fiber when it is necessary to withstand a high temperature (for example, 360 to 400 ° C.) are used.

  As the tapes T1 to T4, flexible adhesive tapes are used. When it is necessary to withstand a high temperature (eg, 360 to 400 ° C.), a heat resistant substrate (eg, a polyimide resin sheet or a metal foil) is used. Etc.) provided with a heat-resistant adhesive layer (for example, polybenzimidazole-based, silicone-based, epoxy-based or ceramics-based).

  In the joining structure 1 of the present invention, the start edge Aa of the new web A is joined to the start edge Aa of the new web A by joining the start edge Ac of the new web A and the old web B with the new web start end covering tape T3. And the old web end cover tape T4 joins the end edge Bc of the old web B and the new web A to cover the end Ba of the old web B. The portion Bb from the stitched portion S to the terminal Ba can be prevented from swinging, and the new web starting end covering tape T1 and the old web-side stitched portion covering tape T2 are used to cover the stitched portions S of the old and new webs A and B. The suture thread can be prevented from being exposed on the surface side of the new and old webs A and B.

  In the joining structure 1 of the present invention, as shown in FIG. 1, the overlapping region E is formed by superimposing the starting end side of the new web A on the upper surface of the end side of the old web B. However, the present invention is not limited to this. Of course, it is possible to form the overlap region E by superimposing the starting end side of the new web A on the lower surface of the end side of the old web B (the joining structure shown in FIG. 1B is inverted). It is.

  Next, the joining apparatus of the present invention for obtaining the joining structure 1 of the present invention will be described based on the embodiment shown in FIGS. As shown in FIG. 2, the joining device 2 of the present invention stitches the web running path R and the overlapping region in which the start end side of the new web A is overlapped with the old web B on the web running path R and the old web B A suturing / cutting device 3 for cutting the end side, a one-side tape affixing work panel 4 arranged on the downstream side of the suturing / cutting device 3 in the web running path R, and a superposition region 4 and a superposition region The other tape affixing work panel 5 capable of supporting the other surface of E is provided. The web running path R is formed by a plurality of guide rolls 6 and the like, and extends from the old web roll Br held by the unwinding device 7 between the unwinding device 7 and the suturing / cutting device 3. After the traveling path Rb and a new web traveling path Ra extending from the new web roll Ar held by the unwinding device 7 are formed, the downstream side from the stitching / cutting device 3 is made straight (see FIG. 5) after joining. The new and old webs A and B are run.

  As shown in FIG. 4, the suturing / cutting device 3 includes a holding means for holding the starting end side of the new web A and the old web B, which are superimposed on the new web running path Ra and the old web running path Rb of the web running path R. 8, a cutting means 9 for cutting the end side of the old web B held by the holding means 8, and a stitching means 10 for stitching the overlapping regions E of the old and new webs A and B held by the holding means 8 And. The holding means 8 sucks and holds the new web suction device 11 having suction cups 11a and 11b before and after the start end side of the new web A (see FIGS. 3 and 4) and the old web B (see FIG. 3). 4) and an old web suction device 12 provided with suction cups 12a and 12b before and after. Both suction devices 11 and 12 are moved closer to a retreating position (position shown in FIG. 2B) to move forward and backward to a forward movement position (position shown in FIG. 4) where the old and new webs A and B are overlapped. Yes. As shown in FIGS. 2 and 4, the sewing means 10 is a sewing machine that is guided by the guide rail 13 and travels so as to cross the web traveling path R in which the new web traveling path Ra and the old web traveling path Rb are overlapped. 14, and the overlapping region E of the old and new webs A and B is stitched by a sewing machine 14 that crosses the web running path R. The cutting means 9 includes a cutting tool 16 made of a rotating blade or a leather blade that is guided by the guide rail 15 and travels so as to cross the old web traveling path Rb.

  The one tape affixing work panel 4 is provided with a new web side stitching portion covering tape T1 and a new web starting end covering tape T3 on the old and new webs A and B (see FIG. 6) supported by the support surface 4a and stopped. Used when working or automatically sticking. The other tape affixing work panel 5 is provided with the old web side stitching portion covering tape T2 and the old web end covering tape T4 on the old and new webs A and B (see FIG. 7) supported by the support surface 5a and stopped. Used when working or automatically sticking. Although an automatic sticking device is not shown in the figure, it is provided for each of the tapes T1 to T4, and the non-adhesive surface side of the tape cut into a predetermined length is sucked and held with a suction tool and stuck from a standby position. After the suction tool is advanced to the attachment position and the tape adhesive surface is pressed onto the web and adhered, the suction tool in the non-suction state is retracted to the standby position.

  As shown in FIG. 2, the joining device 2 of the present embodiment is provided with an accumulator 17 for retaining the web downstream of the other tape sticking work panel 5 of the web running path R, and further a heat treatment device D on the downstream side. Is provided. The accumulator 17 includes a nip roll mechanism or the like provided on the inlet side, and travel / stop means 18 for running / stopping the web, and a nip roll mechanism or the like provided on the inlet side, which causes the web to travel at a constant speed to perform heat treatment apparatus D. Traveling means 19 for feeding to the upper side, a plurality of guide rolls 20 fixedly arranged above, and a plurality of dancer rolls 21 that can be moved up and down, and the staying length of the web wound around the guide rolls 20 and the dancer rolls 21 Is changed by raising and lowering the dancer roll 21. When the web is stopped during the suturing operation by the suturing means 10 or when the tapes T1 to T4 are adhered, the running / stopping means 18 on the entrance side is stopped, and the overlapping region E of the old and new webs A and B is set to the one side. When moving to the tape sticking work panel 4 or the other tape sticking work board 5, the running / stopping means 18 on the entrance side is activated to run the web.

  The heat treatment apparatus D has a floating type in which hot air blown from a plurality of nozzles disposed on both sides of a running web running path is blown to the running web to support the web in a floating state, and many heat treatment apparatuses D are provided on the outer circumferential surface. A floating type or the like in which the web is wound around a roll or drum having a blowout hole and the web is floated by hot air blown from the blowout hole is selected.

  The operation of joining the new and old webs A and B using the connecting device 2 of the present invention is performed according to the following procedure. First, as shown in FIG. 3, the travel of the old web B is stopped immediately before the unwinding of the old web B, and the new web A is unwound and its front end is retracted and the new web is waiting. The suction cup 11 is sucked and held by the suction cups 11a and 11b. Next, as shown in FIG. 4, the suction cups 11a and 11b of the new web suction device 11 and the suction cups 12a and 12b of the old web suction device 12 are advanced to the forward movement position (position shown in FIG. 4), and the new and old webs A, The superposition region E of B is held by the holding means 8. Subsequently, while the overlapping area E of the old and new webs A and B is held by the holding means 8, the end side of the old web B is cut by the cutting means 9 and the overlapping area E is stitched by the stitching means 10.

  When the suturing is completed, as shown in FIG. 5, the new web suction device 11 and the old web suction device 12 of the holding means 3 are retracted to the standby position, and then the old and new webs A and B are sewn as shown in FIG. To stop the superposition | polymerization area | region E on the one tape sticking work panel 6. FIG. The new web-side stitched portion covering tape T1 and the new web starting end covering tape T3 are manually or automatically attached to the new and old webs A and B stopped on the tape attaching work panel 6. Finally, as shown in FIG. 7, the old and new webs A and B are run to stop the overlapping region E on the other tape attaching work panel 7. The old web-side stitched portion covering tape T2 and the old web end covering tape T4 are manually or automatically pasted on the new and old webs A and B stopped on the tape pasting work panel 7 according to the present invention. To complete the joining work.

  As described above, the old and new webs A and B joined by the joining structure 1 of the present invention pass through the inside of the heat treatment apparatus D (see FIG. 2), and hot air is blown to the joining points of the old and new webs A and B, so that the heat treatment is performed. Is done. When the old and new webs A and B are two-layer flexible sheets having one surface formed of a conductive film and the other surface formed of a polyimide resin film, the polyimide resin film can be heat-treated. Even if hot air is blown to the joining part (see FIGS. 1A and 1B) of the new and old webs A and B that are passing through the heat treatment apparatus D, the part Ab and the old web from the stitching part S to the starting end Aa of the new web A The portion Bb from the stitched portion S of the B to the terminal Ba can smoothly pass without swinging (fluttering), and hot air does not contact the suture thread on the surface side of the new and old webs A and B. Therefore, there is no peeling of the fluff of the suture thread that causes a decrease in the cleanness, and the cleanliness in the heat treatment apparatus D can be maintained. Further, in the joining structure 1 according to the present invention, the portions Ab and Bb do not swing (butter) and pass through the heat treatment apparatus D, so that the stitched portion S is not cracked.

BRIEF DESCRIPTION OF THE DRAWINGS Embodiment of this invention joining structure is shown, Comprising: (A) is a top view, (B) is a right view, (C) is a right view of the state which isolate | separated each tape. BRIEF DESCRIPTION OF THE DRAWINGS Embodiment of this invention joining apparatus is shown, Comprising: (A) is a top view, (B) is a right view. FIG. 5 is a right side view showing a state in which the leading end side of the new web is pulled out and held by holding means in the same embodiment of the joining apparatus of the present invention. In the same embodiment of the joining apparatus of the present invention, a state in which the end side of the old web is cut by the cutting means while the overlapped area of the old and new webs is held by the holding means, and the overlapped area is stitched by the suturing means FIG. In the embodiment of this invention joining apparatus, it is a right view which shows the state which cancel | released holding | maintenance of the superposition | polymerization area | region by a holding means after stitching | superposing the superposition | polymerization area | region of an old and new web. In the same embodiment of the joining apparatus of the present invention, the superposed region of the old and new webs is stopped on the one tape affixing work panel, and the new web side stitching part covering tape and the new web starting end covering tape are adhered. FIG. In the same embodiment of the joining device of the present invention, the superposed region of the old and new webs is stopped on the other tape affixing work panel, and the old web side stitching part covering tape and the old web starting end covering tape are adhered. FIG. It is a right view which shows the joining structure of the conventional new and old web.

Explanation of symbols

A ... New web, Ac ... Start edge, Aa ... Start edge, B ... Old web, Ba ... Termination, Bc ... Termination edge, E ... Polymerized area, S ... Suture part, T1 ... New web side suture part covering tape, T2 ... Old web side stitch cover tape, T3 ... New web start end cover tape, T4 ... Old web end cover tape

Claims (4)

A new web side stitching part covering tape for preventing exposure of suture thread covering the stitched part by joining the new and old webs in the structure where the stitched part of the start side of the new web and the terminal end side of the old web are stitched together. swing cover when the suture exposed for preventing expiring web side sewing portion covering tape covering the sewn portion joined to the old web, the new web start bonded straddling new web start edge and the expiring web A new web starting end covering tape for preventing, and an old web end covering tape for preventing rocking that covers the end edge of the old web by joining over the end edge of the old web and the new web. New and old web joint structure.
  2. The new and old web joining structure according to claim 1, wherein the new web and the old web are formed with a conductive film on one side and a polyimide resin film on the other side.   A web traveling path, a stitching / cutting device for stitching a superposed region in which the starting end side of the new web is superimposed on the old web on the web traveling path and cutting the terminal end side of the old web, and stitching / cutting of the web traveling path An old and new web, which is provided on the downstream side of the apparatus, has one tape affixing work panel capable of supporting one surface of the polymerization region and another tape affixing work panel capable of supporting the other surface of the polymerization region Joining device. Heat treatment of the old and new webs in which the old and new webs joined by the old and new web joining structure according to claim 1 or 2 are run and passed through the heat treatment apparatus, and hot air is blown to the new and old webs in the heat treatment apparatus. Method.

Images