WO2019022047A1

WO2019022047A1 - Butt splicing method and apparatus

Info

Publication number: WO2019022047A1
Application number: PCT/JP2018/027621
Authority: WO
Inventors: 龍平吉田
Original assignee: 富士フイルム株式会社
Priority date: 2017-07-27
Filing date: 2018-07-24
Publication date: 2019-01-31
Also published as: JPWO2019022047A1; TW201910247A; JP6831465B2

Abstract

Provided are a butt splicing method and apparatus with which it is possible to prevent misalignment and folds in old and new films that have been overlapped. An old film (22) and a new film (32) are overlapped and cut by a cutting drum (40) and a cutting-splicing drum (42). Next, a downstream excess section of the new film (32) is separated from the old film (22); the trailing end of the old film (22) formed by cutting and the leading end of the new film (32) formed by cutting are abutted and conveyed thus to a splicing position; a splicing tape is applied to the abutting sections; and the old film (22) and the new film (32) are spliced together. Before the old film (22) and the new film (32) are overlapped, an adhesive (92) is sprayed between the old film (22) and the new film (32).

Description

Butt welding method and apparatus

The present invention relates to a butt joining method and apparatus for joining by a joining tape in a state where the rear end of an old film and the front end of a new film are abutted.

The following Patent Documents 1 to 4 are known as butt-joining apparatuses for joining with a joining tape in a state where the rear end of the old film and the front end of the new film are butted. These butt welding devices comprise a turret device and a cutting and bonding unit. The turret apparatus includes a turret arm on which an old roll around which an old film is wound and a new roll around which a new film is wound is supported, and the old film and the new film are transported from the turret arm to the cutting and combining unit (Rewound and transported).

In the cutting and bonding unit, new and old films are cut in a superimposed state. Thereafter, the new and old films are conveyed to a bonding position where bonding is performed in a state where the rear end of the old film formed by cutting and the front end of the new film formed by bonding are butted. Then, at the joining position, the rear end of the old film and the front end of the new film are joined by the joining tape.

Patent No. 4487315 Japanese Patent Application Publication No. 2007-063011 Japanese Patent Application Laid-Open No. 50-084670 Japanese Examined Patent Publication No. 49-012329

As described above, in the butt-joining apparatus, new and old films are cut in a superimposed state and then transported to the joining position. However, in the conventional butt-joining apparatus, one of the films is displaced or wrinkled during this conveyance. As a result, there is a problem that it may cause a failure of bonding (see FIGS. 8 and 9).

The present invention has been made in view of the above background, and it is an object of the present invention to provide a butt joining method and apparatus capable of smooth (smooth) joining by preventing misalignment and curling of overlapped old and new films. There is.

In order to achieve the above object, according to the butt-joining method of the present invention, the rear end of a band-like old film unwound and conveyed from an old roll and the front end of a band-like new film unwound and conveyed from a new roll In the butt-joining method of joining with a joining tape in a state, a superposition step of superposing a new and old film, a cutting step of cutting the new and old film superposed in the superposition step, and a back of the old film formed by cutting An adhesive is provided to releasably bond the old and new films between the bonding step of bonding the end and the tip of the new film formed by cutting with a bonding tape, and the new and old films to be stacked in the stacking step. And an adhesive supplying step.

The adhesive may be supplied to at least a part of the width direction of the new and old films.

The adhesive may be a liquid.

The bonded body may be vaporized without heating.

The adhesive may be supplied by spraying.

The adhesive may be a double-sided tape having an adhesive layer formed on both sides.

The adhesive may be supplied to a range including the upstream and downstream sides of the cutting position of the old and new films to be cut in the cutting step.

The double-sided tape may be supplied upstream of the cutting position of the new and old films to be cut in the cutting step.

The double-sided tape may have different adhesion between the adhesive layer on the side of the old film and the adhesive layer on the side of the new film.

And a new film separation step of separating the downstream side of the new film cut in the cutting step from the old film from the cutting position, and in the bonding step, the side of the old film on which the new film is separated in the new film separation step. The bonding may be performed by sticking a bonding tape across the rear end of the old film and the front end of the new film from the surface.

Among the old films cut in the cutting step, there is provided an old film separating step for separating the upstream side of the cutting position from the new film, and in the joining step, the side of the new film from which the old film was separated in the old film separating step. Bonding may be performed by sticking a bonding tape across the front end of the new film and the rear end of the old film from the surface.

In the cutting step, the cutting may be performed by sandwiching the old and new films with a pair of cutting drums provided with a cutting blade on one outer periphery.

In the bonding step, bonding may be performed by sandwiching the butted portion of the rear end of the old film and the front end of the new film with a pair of affixing drums in which a bonding tape is disposed on one outer periphery.

Further, in order to achieve the above object, according to the butt-joining apparatus of the present invention, a rear end of a band-like old film unwound and conveyed from an old roll and a leading end of a band-like new film unwound and conveyed from a new roll In a butt joining apparatus in which a joining tape is joined in a butt state, an overlapping mechanism for overlapping old and new films, a cutting mechanism for cutting old and old films overlapped by the overlapping mechanism, and an old film formed by cutting An adhesive that releasably bonds new and old films between a bonding mechanism that bonds a rear end of a new film and a leading end of a new film formed by cutting with a bonding tape, and a new and old film that is stacked in a stacking mechanism. And an adhesive supply mechanism for supplying

In the present invention, adhesion is performed by supplying an adhesive between the new and old films to be overlapped, so that deviation and curling of the old and new films can be prevented, and smooth (smooth) bonding becomes possible.

It is explanatory drawing which shows the outline of a butt-joining apparatus. It is an enlarged view of a cutting joining unit. It is an enlarged view of a cutting joining unit. It is an enlarged view of a cutting joining unit. It is an enlarged view of a cutting joining unit. It is an enlarged view of a cutting joining unit. It is explanatory drawing which shows butt joining procedure. It is explanatory drawing which shows the example which the new film shifted. It is explanatory drawing which shows the example in which the new film was rolled. It is explanatory drawing which shows the spraying range of the adhesion body in a conveyance direction. It is an enlarged view of a cutting joining unit. It is explanatory drawing which shows the affixing position of the double-sided tape in a conveyance direction. It is explanatory drawing which shows the affixing position of the double-sided tape in a conveyance direction.

As shown in FIG. 1, the butt welding apparatus 10 of the present invention includes a turret device 12 and a cutting and welding unit 14. The turret device 12 has a turret arm 16, and the turret arm 16 is rotatably provided on a support 18 with an axis 20 as a fulcrum. At one end of the turret arm 16, an old roll 24 around which a band-shaped old film 22 to be unwound is wound is rotatably supported via a shaft 26. At the other end of the turret arm 16, a new roll 34 around which a band-shaped new film 32 to be unwound is wound is rotatably supported via a shaft 36.

The butt-joining apparatus 10 cuts the new and

old films

22 and 32 in a stacked state, and cuts the rear end of the old film 22 formed by the cutting (the rear end of a product portion 22a (see FIG. 7) described later) In the state where the front end of the new film 32 (the rear end of a product portion 32a (see FIG. 7) described later) formed by The new and

old films

22 and 32 to be bonded are respectively unwound from the old roll 24 and the new roll 34 set in the turret device 12 and conveyed (rewound and conveyed) to the cutting and combining unit 14.

As shown in FIGS. 2 to 6, the cutting and joining unit 14 includes a cutting drum 40, a cutting and joining drum 42 (cutting drum, pasting drum), a joining drum 44 for the front face (pasting drum), and a joining drum for the back face. Each of the

drums

40, 42, 44, 46 is rotatably mounted on the machine frame 48. The cutting drum 40 and the cutting and joining drum 42 constitute the overlapping mechanism and the cutting mechanism of the present invention. Further, the joining mechanism of the present invention is constituted by the cutting and joining drum 42, the joining drum 44 for the front surface, and the joining drum 46 for the back face.

After the old film 22 is inserted between the cutting drum 40 and the cutting and bonding drum 42 and between the surface bonding drum 44 and the back surface bonding drum 46, a shock absorber that buffers tension fluctuations and speed fluctuations ( (Not shown). On the other hand, the tip of the new film 32 is attracted to the cutting drum 40, and the new film 32 stands by in a state of preparation for joining shown in FIG.

The cutting drum 40 is provided with a cutter 50 (cutting blade). The cutter 50 is attached to the outer peripheral portion of the cutting drum in a state where the cutter 50 protrudes from the outer peripheral surface of the cutting drum 40 by a predetermined amount. The cutter 50 is attached at an angle θ with respect to the width direction of the cutting drum 40 (that is, the width direction of the old and new films 22 and 32) in order to improve the cutting quality. A cutting unit 52 is provided on the outer periphery of the cutting and joining drum 42 at a position where the cutter 50 abuts, and the old film 22 and the new film 32 are formed by the cutting unit 52 and the cutter 50 as shown in FIG. The old film 22 and the new film 32 are cut by sandwiching (sandwiching) in an overlapping state (in an overlapping state).

An intake hole (not shown) is provided on the outer peripheral surface of the cutting drum 40 on the downstream side in the rotational direction of the cutter 50, and the vicinity of the tip of the new film 32 before cutting is sucked into the intake hole. As shown in FIG. 3, it is adsorbed on the outer peripheral surface of the cutting drum 40. Further, on the outer peripheral surface of the cutting drum 40, a vent hole (not shown) is provided on the upstream side in the rotational direction of the cutter 50, and the tip of the new film 32 after cutting (newly formed by cutting The leading end of the film 32, which is the leading end of a product portion 32a described later, is separated from the outer peripheral surface of the cutting drum 40 by air supply from air supply holes, as shown in FIG. 4 and FIG.

Intake holes (not shown) are provided on the outer peripheral surface of the cutting and joining drum 42 on the upstream and downstream sides of the cutting portion 52 in the rotational direction, and the old film 22 is sucked by the suction holes and the cutting and joining drum 38 And is moved along with the rotation of the cutting and connecting drum 38, as shown in FIGS. Then, as shown in FIG. 3, the old film 22 is cut in a state of being overlapped with the new film 32 by the cutting drum 40 and separated into a downstream product portion 22a and an upstream surplus portion 22b. As shown in FIG. 4, the sheet is conveyed toward the surface bonding drum 44.

On the other hand, as shown in FIG. 3, after the new film 32 is separated into the surplus portion 32b on the downstream side and the product portion 32a on the upstream side by cutting, as shown in FIG. The product portion 32a is separated from the old film 22 by being attracted to the outer peripheral surface of the drum 40, and the product portion 32a is accompanied by the surplus portion 22b of the old film 22 while being overlapped with the surplus portion 22b of the old film 22. , And transported toward the surface bonding drum 44 (see FIG. 7C).

A guide member 60 is provided between the cutting drum 40 and the cutting and bonding drum 42 and the surface bonding drum 44. The guide member 60 guides to a joining position (see FIG. 4) where the new and

old films

22 and 32 after cutting are joined, and the old and

new films

22 and 32 after cutting are the old films 22 formed by cutting. In a state where the rear end (the rear end of the product portion 22a) and the front end of the new film 32 formed by cutting (the front end of the product portion 32a) are abutted, it is guided to the joining position shown in FIG. The guide member 60 is provided with an arc-shaped guide surface facing the cutting and joining drum 42, and the guide surface is coated with a fluorine resin or the like to reduce the frictional resistance to the old and

new films

22 and 32.

A surface bonding tape 72 is disposed on the outer peripheral surface of the surface bonding drum 44. An intake hole (not shown) is formed on the outer peripheral surface of the surface bonding drum 44, and the surface bonding tape 72 is attracted to the outer peripheral surface of the surface bonding drum 44 by being sucked into the intake hole. ing. The surface bonding tape 72 has an adhesive surface on one side, and is attracted to the outer peripheral surface of the surface bonding drum 44 with the adhesive surface directed outward. The surface bonding tape 72 is automatically supplied onto the outer peripheral surface of the surface bonding drum 44 by a surface bonding tape supply device (not shown).

The surface joining drum 44 starts to rotate as the butt portion of the rear end of the product portion 22a of the old film 22 and the front end of the product portion 32a of the new film 32 approaches, and as shown in FIG. The surface bonding tape 72 is attached to the area including the portion by pressing the surface bonding tape 72 from the surface side (lower side in the drawing) (sandwiching between the cutting bonding drum 42 and the surface bonding drum 44). As a result, the rear end of the product portion 22a of the old film 22 and the front end of the product portion 32a of the new film 32 after cutting are joined from the surface side.

Thus, after the new and

old films

22 and 32 are joined from the surface side, as shown in FIG. 5, the product portion 32 a of the new film 32 is the surface joining drum 44 together with the product portion 22 a of the old film 22. It is attracted to the outer peripheral surface, moves along with the rotation of the front surface bonding drum 44, and is conveyed toward the rear surface bonding drum 46. On the other hand, the surplus portion 22b of the old film 22 located on the back side (upper side in the drawing) of the product portion 32a of the new film 32 is rotated along with the rotation of the cutting and bonding drum 42 while being absorbed by the cutting and bonding drum 42. Is separated from the product portion 32 a of the new film 32.

A back surface bonding tape 82 is disposed on the outer peripheral surface of the back surface bonding drum 46. A suction port (not shown) is formed on the outer peripheral surface of the rear surface bonding drum 46, and the rear surface bonding tape 82 is attracted to the outer peripheral surface of the rear surface bonding drum 40 by being attracted to the suction port. ing. One surface of the rear surface bonding tape 82 is an adhesive surface, and the outer surface of the rear surface bonding drum 46 is adsorbed with the adhesive surface facing outward. The rear surface bonding tape 82 is automatically supplied onto the outer peripheral surface of the rear surface bonding drum 46 by a rear surface bonding tape supply device (not shown).

The back surface connecting drum 46 rotates as the butt portion (the portion joined by the surface bonding tape 72) of the rear end of the product portion 22a of the old film 22 and the front end of the product portion 32a of the new film 32 approaches. Start, and press the back surface bonding tape 82 from the back side to the area including the butt portion as shown in FIG. 5 (by holding between the front surface bonding drum 44 and the back surface bonding drum 46) Paste the bonding tape 82. As a result, the product portion 22a of the old film 22 and the product portion 32a of the new film 32 are also joined from the back side.

Thus, as shown in FIG. 6, the rear end of the old film 22 after cutting, ie, the rear end of the product portion 22a of the old film 22, and the front end of the new film 32 after cutting, ie, the product portion of the new film 32. The tip of 32a is joined from both the front side and the back side. The

surplus portions

22b and 32b of the new and

old films

22 and 32 separated from the

product portions

22a and 32a of the new and

old films

22 and 32 in the process of bonding are separated after separation (or the old and new films 22 and 32). After bonding).

As described above, in the butt-joining apparatus 10, as shown in FIG. 7A, the old and

new films

22 and 32 are overlapped (superposing step), and in this state, as shown in FIG. The new and

old films

22 and 32 are cut (cutting step). By this cutting, the old film 22 is divided into the downstream product portion 22a and the upstream surplus portion 22b. Further, the new film 32 is divided into the surplus portion 32 b on the downstream side and the product portion 32 a on the upstream side by this cutting.

Thereafter, as shown in FIG. 7C, the surplus portion 32b of the new film 32 is separated from the product portion 22a of the old film 22 (new film separation step). Then, as shown in FIG. 6D, the rear end of the product portion 22a of the old film 22 (the rear end of the old film 22 formed by cutting) and the front end of the product portion 32a of the new film 32 (formed by cutting In the state where the front end of the new film 32 is in contact with each other, the joining tape is provided from the surface side to the butt portion across the rear end of the product portion 22a of the old film 22 and the front end of the product portion 32a of the new film 32 72 is stuck, and new and

old films

22 and 32 are joined from the surface side (surface joining step).

After this, as shown in FIG. 7E, the surplus portion 22b of the old film 22 is separated from the product portion 32a of the new film 32 (old film separation step). And as shown to the figure (F), the junction tape 82 for backs is stuck from the back side to the butt part straddling the back end of the product part 22a of the old film 22, and the tip of the product part 32a of the new film 32. The new and

old films

22 and 32 are also bonded from the back side (back side bonding step).

When the new and

old films

22 and 32 are joined by the method described above, they are held between the cutting step and the joining step (in the present embodiment, the surface joining step), that is, held between the cutting drum 40 and the cutting junction drum 42 After the new and

old films

22 and 32 are cut in the overlapped state (see FIGS. 3 and 7B), the joining position (FIGS. 4 and 7C and 7D) is obtained via the guide member 60. ) Is conveyed while the rear end of the product portion 22a of the old film 22 and the front end of the product portion 32a of the new film 32 are in contact with each other.

In this transport, the product portion 32a of the new film 32 is transported in a state of being superimposed on the surplus portion 22b of the old film 22 (see FIGS. 3 and 4). However, although the surplus portion 22b of the old film 22 is attracted to the outer peripheral surface of the cutting and joining drum 42 and is conveyed along with the rotation of the cutting and bonding drum 42, the old film 22 is produced for the product portion 32a of the new film 32. As shown in FIG. 8, the product portion 32a of the new film 32 may be misaligned as shown in FIG. 8, or the product portion 32a of the new film 32 may be curled as shown in FIG. There is a possibility that In such a case, the surface bonding tape 72 also sticks to the surplus portion 22 b of the old film 22, which makes it difficult to remove the surplus portion 22 b of the old film 22. If the amount of displacement or curl of the product portion 32a of the new film 32 is large, the old film 22 and the new film 32 may not be joined together.

In order to prevent such a problem, in the butt-joining apparatus 10 of the present invention, as shown in FIGS. 1 to 6, a sprayer 90 (adhesive supply mechanism) is provided. Then, as shown in FIG. 2 and FIG. 10, an adhesive 92 for temporarily (separably) bonding the new and

old films

22, 32 between the new and

old films

22, 32 by the sprayer 90. In the present embodiment, the liquid, more specifically water, is supplied by spraying. That is, prior to the above-described superposition step, an adhesive supply step is provided for supplying an adhesive 92 between the new and

old films

22 and 32.

In FIG. 2, the sprayer 90 moves from the spraying position to the spraying position located between the new and

old films

22 and 32 and from the spraying position to the width direction (the front side (or back side) of the films 22 and 32) It is installed on the machine frame 48 so as to be movable between the new and

old films

22 and 32 and the retracted position retracted. Then, the sprayer 90 moves to the spray position when bonding the old and

new films

22 and 32, sprays the bonded body 92 between the old film 22 and the new film 32, and retracts to the retracted position after spraying. In the present embodiment, the sprayer 90 is provided movably between the spray position and the retracted position, but the sprayer 90 is fixed at the retracted position (outside of the old and

new films

22 and 32 in the width direction). An adhesive 92 may be sprayed between the

films

22 and 32.

In addition, the spraying conditions such as the particle size of the adhesive 92 to be sprayed and the amount of the adhesive 92 to be sprayed (the spray amount per unit time and the total spray amount (the product of the spray amount per unit time and the spray time)) Can be set appropriately, but in the present embodiment, the adhesive 92 formed after contacting with the old and

new films

22 and 32 has a particle diameter of 20 μm or less before contacting the old and

new films

22 and 32. The spraying conditions are determined such that the thickness of the layer (average thickness) is 1 μm or less.

The range (spray range) in which the adhesive 92 is sprayed can be set as appropriate, but the adhesive 92 is an old film in the period from the cutting step to the bonding step (surface bonding step) (see FIGS. 3 and 4). It is provided to enhance the adhesion between the 22 surplus portions 22b and the product portion 32a of the new film 32 and to prevent the displacement and curling of the product portion 32a of the new film 32. For this reason, in the present embodiment, the spray range of the adhesive 92 in the transport direction of the old and

new films

22 and 32 is a range including the upstream side and the downstream side of the planned cutting position 94 and the downstream of the planned cutting position 94 The upstream side (that is, the side on which the product portion 32a of the new film 32 is present) is wider than the side (see FIGS. 7A, 7B, and 10). In the present embodiment, the spray range of the adhesive 92 in the width direction of the new and

old films

22 and 32 is the entire width direction of the new and

old films

22 and 32.

As described above, according to the present invention, by supplying the adhesive 92 between the new film 22 and the old film 32, it is possible to improve the adhesion when the old film 22 and the old film 22 are superimposed, so the problem described above That is, the problem (see FIGS. 8 and 9) that the new film 32 is displaced or warped between the cutting step and the bonding step is prevented, and smooth (smooth) bonding becomes possible.

Further, in the present embodiment, since the liquid is used as the adhesive 92 and is supplied by spraying it, the supply of the adhesive 92 is easy, and it is possible to easily prevent the deviation and curling of the new film 32. Furthermore, in the present embodiment, since water is used as the adhesive body 92, the

surplus portions

22b and 32b of the old and

new films

22 and 32 are used as product portions as compared with the case where a commercially available adhesive is used as the adhesive body. It is easy to separate them from 22a and 32a (to release the adhesion state of the new and

old films

22 and 32 by the adhesive 92), and there is no case that the smooth joining is hindered. In addition, since water, that is, a liquid that is vaporized without heating, is used as the adhesive 92, the adhesive is removed, such as a heating device or a wiping device, as compared with the case where a liquid that is not vaporized by nonheating is used as the adhesive. It is possible to easily prevent the shift and the twist of the new film 32 without providing a dedicated device or process for the purpose.

In addition, this invention is not limited to the said embodiment, It can change suitably about the structure of a detail. For example, in the above embodiment, an example in which the film is bonded on both the front surface side and the rear surface side has been described, but the film may be bonded on one side (one of the front surface side and the rear surface side). In addition, the thickness of the film to be joined may be any thickness. However, it is more effective to apply the present invention to an apparatus or method for bonding a thin film (for example, having a thickness (average of thickness) of 25 μm or less) which is easily shifted or distorted.

In the above embodiment, the spray range of the adhesive in the width direction of the film is described as the entire area in the width direction of the film, but only a part of the film in the width direction may be the spray range of the adhesive. However, in the case where only a part in the width direction is set as the spray range of the adhesive, it is preferable to set the range including the most downstream portion in the planned cutting position 94 (see FIGS. 7 and 10) as the spray range. .

That is, in the above embodiment, the cutter 50 is inclined at an angle θ with respect to the width direction of the cutting drum 40 in order to improve the cutting quality, and the new and

old films

22 and 32 are inclined at an angle θ with respect to the width direction. In the state where the planned cutting position 94 is inclined at an angle θ, it becomes a long line shape in the width direction, and one end of the planned cutting position 94 in the width direction is located downstream and the other end is Located upstream. In such a case, a range including one end in the width direction of the planned cutting position 94 (the most downstream portion of the planned cutting position 94), that is, a range including the leading portion when transported is defined as the spray range. This can more effectively prevent the problem of deviation or curl compared to the case of performing spraying to the other range.

Moreover, although the said embodiment demonstrated by the example which sprays and supplies an adhesive body, you may supply an adhesive body by methods other than a spray, such as apply | coating and supplying an adhesive body. Furthermore, although the example using the water which vaporizes by non-heating as an adhesive body was demonstrated, you may use liquids other than the water which vaporizes by non-heating as an adhesive body. In addition, as the adhesive, a liquid vaporized by heating may be used. Furthermore, the gas which has vaporized the adhesive is sent between the new and

old films

22 and 32, and the gas is condensed on the surface of the old film 22 and the new film 32 to form an adhesive between the new and

old films

22 and 32. It may be supplied.

Moreover, you may use the double-sided tape 102 as an adhesive body like the butt-joining apparatus 100 shown in FIG. In FIG. 11, the butt-joining apparatus 100 is provided with an affixing apparatus 104 (adhesion body supply mechanism) for supplying a double-sided tape 102 having an adhesive layer formed on both sides as an adhesion body between new and

old films

22 and 32. . In the description using the drawings after FIG. 11, the same members as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

The affixing device 104 is provided movably between an affixing position positioned between the new and

old films

22 and 32 and a retracted position retracted to the front side (or back side) of FIG. 11 from the affixing position. There is. Then, at the affixing position, the affixing device 104 affixes (supplys) the double-sided tape 102 to the old film 22 and then retracts to the retraction position. Note that the double-sided tape 102 may be attached (supplied) to the new film 32. Alternatively, the double-sided adhesive tape 102 may be attached (supplied) manually to the old film 22 or the new film 32 in advance without providing the attaching device 104.

As shown in FIG. 12, in the present example, the double-sided tape 102 is supplied (pasted) on the upstream side of the planned cutting position 94. Further, in this example, as the double-sided tape 102, one having a higher adhesive strength on the side of the old film 22 than that on the side of the new film 32 is used. By doing this, when separating the surplus portion 22b of the old film 22 from the product portion 32a of the new film 32, the double-sided tape 102 is stuck to the surplus portion 22b of the old film 22 and is separated from the product portion 32a of the new film 32. As a result, it is possible to omit the process of removing the double-sided adhesive tape 102 from the product portion 32a of the new film 32 later, which enables smooth bonding.

Note that, as shown in FIG. 13, the double-sided tape 102 may be attached in a range including the upstream side and the downstream side of the planned cutting position 94. However, in this case, it is preferable that the adhesive force provided between the adhesive layer provided on one side of the double-sided tape 102 and the adhesive layer provided on the opposite side be different. Furthermore, when the adhesive layer on the side of the old film 22 has a weaker adhesive force than the adhesive layer on the side of the new film 32, the double-sided tape 102 remains on the product portion 32a of the new film 32. It is preferable to determine the size and the attachment range of the back surface bonding tape 82 and the double-sided tape 102 so as to be covered by the sheet 82. On the other hand, when the adhesive layer on the new film 32 side has a weaker adhesive force than the adhesive layer on the old film 22 side, the double-sided tape 102 remains on the product portion 22a of the old film 22 and this whole surface is the surface It is preferable to determine the size and the application position of the surface bonding tape 72 and the double-sided tape 102 so as to be covered by the bonding tape 72. By doing this, since the double-sided tape 102 (adhesive layer) is not exposed (not exposed to the surface) from the

product portions

22a, 32a of the joined old and

new films

22, 32, process contamination can be reduced.

In the above embodiment, two rolls, the old roll around which the old film is wound and the new roll around which the new film is wound, are supported by a common device (turret device), and from this common device Although the example of supplying the new and old films to the butt-joining apparatus has been described, an apparatus for supporting the old roll and an apparatus for supporting the new roll are separately provided, and the new and old films are separately provided to the butt-joining apparatus And may be supplied. Also, although the example in which the film wound up in roll form is supplied to the butt-joining apparatus has been described, for example, a butt-joining apparatus as it is without winding up a strip-shaped film produced in a film manufacturing process. It may be supplied to

10, 100 Butt Bonding Device 12 Turret Device 14 Cutting Bonding Unit 16 Turret Arm 18

Support

20, 26 and 36 Axis 22 Old Film

22a Product Part

22b Excess Part 24 Old Roll 32 New Film

32a Product Part

32b Excess Part 34 New Roll 40 Cutting Drum 42 cutting and joining drum (cutting drum, pasting drum)
44 Bonding drum for surface (sticking drum)
46 Bonding drum for back side (pasting drum)
48 machine frame 50 cutter (cutting blade)
60 Guide member 52 Cutting section 72 Bonding tape for front surface 82 Bonding tape for back surface 90 Sprayer (adhesive supply mechanism)
92 bonded body 94 planned cutting position 102 double-sided tape (bonded body)
104 Sticking device (adhesive supply mechanism)

Claims

In the butt-joining method, bonding is performed using a bonding tape in a state where the rear end of the band-like old film unwound and conveyed from the old roll and the front end of the band-like new film unwound and conveyed from the new roll are butted.
An overlaying step of overlaying the new and old films;
Cutting the new and old films superposed in the superposition step;
Bonding the rear end of the old film formed by the cutting and the leading end of the new film formed by the cutting with the bonding tape;
An adhesive supplying step of supplying an adhesive which releasably adheres the new and old films between the new and old films to be overlapped in the overlapping step.
The butt-joining method according to claim 1, wherein the adhesive body is supplied to at least a part of the width direction of the new and old films.
The butt-joining method according to claim 1 or 2, wherein the adhesive is a liquid.
The butt-joining method according to claim 3, wherein the adhesive is vaporized without heating.
The butt-joining method according to claim 3 or 4, wherein the adhesive is supplied by spraying.
The butt-joining method according to claim 1 or 2, wherein the adhesive body is a double-sided tape in which an adhesive layer is formed on both sides.
The butt-joining method according to any one of claims 1 to 6, wherein the adhesive is supplied to a range including the upstream side and the downstream side of the cutting position of the new and old films to be cut in the cutting step.
The butt-joining method according to claim 6, wherein the double-sided tape is supplied to the upstream side of the cutting position of the old and new films to be cut in the cutting step.
The butt-joining method according to claim 8, wherein the double-sided tape has different adhesion between the adhesive layer on the side of the old film and the adhesive layer on the side of the new film.
In the butt-joining apparatus, joining is performed using a joining tape in a state where the rear end of the band-like old film unwound and conveyed from the old roll and the front end of the band-like new film unwound and conveyed from the new roll
A superposition mechanism for superposing the new and old films;
A cutting mechanism for cutting the new and old films superposed by the superposition mechanism;
A bonding mechanism for bonding the rear end of the old film formed by the cutting and the leading end of the new film formed by the cutting with the bonding tape;
An adhesive supply mechanism for supplying an adhesive which releasably adheres the new and old films, between the new and old films to be superposed in the superposition mechanism.