JP6831465B2 - Butt joining method and equipment - Google Patents

Description

The present invention relates to a butt joining method and apparatus for joining with a joining tape in a state where the rear end of the old film and the tip of the new film are butted.

The following Patent Documents 1 to 4 are known as a butt joining device for joining with a joining tape in a state where the rear end of the old film and the tip of the new film are butted against each other. These butt-joining devices include a turret device and a cutting-coupling unit. The turret device is equipped with a turret arm in which an old roll around which the old film is wound and a new roll around which the new film is wound are pivotally supported, and the old film and the new film are transported from the turret arm to the cutting coupling unit. Is (rewound and transported).

In the cutting connection unit, the old and new films are cut in a superposed state. After that, the old and new films are conveyed to the joining position where the joining is performed in a state where the rear end of the old film formed by cutting and the tip of the new film also formed by joining are butted against each other. Then, at the joining position, the rear end of the old film and the tip of the new film are joined by a joining tape.

Japanese Patent No. 4487315 Japanese Unexamined Patent Publication No. 2007-063011 Japanese Unexamined Patent Publication No. 50-08467 Tokukousho 49-012329

As described above, in the butt joining device, the old and new films are cut in a superposed state and then transported to the joining position, but in the conventional butt joining device, one of the films is displaced or rolled during this transfer. This is a problem because it may interfere with joining (see FIGS. 8 and 9).

The present invention has been made in view of the above background, and an object of the present invention is to provide a butt joining method and an apparatus capable of smooth joining by preventing displacement and curling of old and new films that are overlapped with each other. There is.

In order to achieve the above object, in the butt joining method of the present invention, the rear end of the strip-shaped old film rewound from the old roll and the tip of the strip-shaped new film rewound from the new roll are butted against each other. In the butt joining method of joining with a bonding tape in the state, after the stacking step of superimposing the old and new films, the cutting step of cutting the old and new films overlapped in the stacking step, and the old film formed by cutting. Supplying an adhesive that separably adheres the old and new films between the joining step that joins the end and the tip of the new film formed by cutting with a joining tape and the old and new films that are overlapped in the stacking step. It is equipped with an adhesive supply step.

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

The adhesive may be liquid.

The adhesive may be vaporized without heating.

The adhesive may be supplied by spraying.

The adhesive body may be a double-sided tape having adhesive layers formed on both sides.

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

Double-sided tape may be supplied upstream of the cutting position of the old and new films that are cut in the cutting step.

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

It is provided with a new film separation step that separates the downstream side of the new film cut in the cutting step from the old film from the cutting position, and in the joining step, the side of the old film from which the new film was separated in the new film separation step. The bonding may be performed by attaching the bonding tape from the surface across the rear end of the old film and the tip of the new film.

The old film separation step for separating the upstream side of the old film cut in the cutting step from the new film from the cutting position is provided, and in the joining step, the side of the new film on which the old film was separated in the old film separation step. The bonding may be performed by attaching the bonding tape from the surface across the tip of the new film and the rear end of the old film.

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

In the joining step, joining may be performed by sandwiching the abutting portion between the rear end of the old film and the tip of the new film with a pair of sticking drums having a joining tape arranged on one outer circumference.

Further, in order to achieve the above object, the butt-joining device of the present invention has a rear end of a strip-shaped old film rewound and transported from an old roll and a tip of a strip-shaped new film rewound and transported from a new roll. In a butt joining device that joins with a joining tape in a butt state, a superimposing mechanism that superimposes old and new films, a cutting mechanism that cuts old and new films superposed by the superimposing mechanism, and an old film formed by cutting. An adhesive that detachably adheres the old and new films between the joining mechanism that joins the rear end and the tip of the new film formed by cutting with a joining tape and the old and new films that are overlapped in the stacking mechanism. It is equipped with an adhesive supply mechanism that supplies the film.

In the present invention, since the adhesive body is supplied between the old and new films to be overlapped, the old and new films are prevented from shifting and curling, and smooth (smooth) joining is possible.

It is explanatory drawing which shows the outline of the butt joining apparatus. It is an enlarged view of the cutting joint unit. It is an enlarged view of the cutting joint unit. It is an enlarged view of the cutting joint unit. It is an enlarged view of the cutting joint unit. It is an enlarged view of the cutting joint unit. It is explanatory drawing which shows the butt joining procedure. It is explanatory drawing which shows the example which the new film is displaced. It is explanatory drawing which shows the example which the new film was rolled up. It is explanatory drawing which shows the spraying range of the adhesive body in the transport direction. It is an enlarged view of the cutting joint unit. It is explanatory drawing which shows the sticking position of the double-sided tape in the transport direction. It is explanatory drawing which shows the sticking position of the double-sided tape in the transport direction.

As shown in FIG. 1, the butt joining device 10 of the present invention includes a turret device 12 and a cutting joining unit 14. The turret device 12 has a turret arm 16, and the turret arm 16 is rotatably provided on a support column 18 with a shaft 20 as a fulcrum. An old roll 24 around which a strip-shaped old film 22 for which rewinding is completed is wound around one end of the turret arm 16 is rotatably supported via a shaft 26. Further, a new roll 34 around which a new strip-shaped film 32 for starting rewinding is wound is rotatably supported on the other end of the turret arm 16 via a shaft 36.

The butt joining device 10 cuts the old and new films 22 and 32 in a superposed state, and cuts the rear end of the old film 22 (the rear end of the product portion 22a (see FIG. 7) described later) formed by cutting. The tip of the new film 32 formed by the above (the rear end of the product portion 32a (see FIG. 7) described later) is abutted and joined. The old and new films 22 and 32 to be joined are rewound from the old roll 24 and the new roll 34 set in the turret device 12, respectively, and are conveyed (rewound and conveyed) toward the cutting and coupling 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 front surface joining drum 44 (pasting drum), and a back surface joining drum. 46 (paste drums) are provided, and the drums 40, 42, 44, and 46 are rotatably installed in the machine frame 48. Then, the cutting drum 40 and the cutting joining drum 42 constitute the superposition mechanism and the cutting mechanism of the present invention. Further, the joining mechanism of the present invention is configured by the cutting joining drum 42, the front joining drum 44, and the back joining drum 46.

The old film 22 is a shock absorber that buffers tension fluctuations and speed fluctuations after being inserted between the cutting drum 40 and the cutting joint drum 42 and between the front surface bonding drum 44 and the back surface bonding drum 46. (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 the state of being ready 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 of protruding by a predetermined amount from the outer peripheral surface of the cutting drum 40. Further, the cutter 50 is attached in a state of being inclined by 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 sharpness. A cutting portion 52 is provided on the outer peripheral portion of the cutting joining drum 42 at a position where the cutter 50 comes into contact with the cutting portion 52. As shown in FIG. 3, the cutting portion 52 and the cutter 50 are used to connect the old film 22 and the new film 32. The old film 22 and the new film 32 are cut by superimposing (in a superposed state) and sandwiching (holding) the film.

An intake hole (not shown) is provided on the outer peripheral surface of the cutting drum 40 on the downstream side in the rotation direction of the cutter 50. In the new film 32 before cutting, the vicinity of the tip is sucked into the intake hole, and FIG. , As shown in FIG. 3, is attracted to the outer peripheral surface of the cutting drum 40. Further, on the outer peripheral surface of the cutting drum 40, an air supply hole (not shown) is provided on the upstream side in the rotation direction of the cutter 50, and a new tip portion (newly formed by cutting) of the new film 32 after cutting is provided. As shown in FIGS. 4 and 5, the tip portion of the film 32, which is the tip portion of the product portion 32a described later), is separated from the outer peripheral surface of the cutting drum 40 by air supply from the air supply holes.

On the outer peripheral surface of the cutting joint drum 42, intake holes (not shown) are provided on the upstream side and the downstream side in the rotation direction of the cutting portion 52, and the old film 22 is sucked into the intake holes to cut and join the drum 38. It is adsorbed on the outer peripheral surface of the drum, and as shown in FIGS. 3 and 4, it moves with the rotation of the cutting coupling drum 38. Then, as shown in FIG. 3, the old film 22 is cut by the cutting drum 40 in a state of being overlapped with the new film 32 and separated into a product portion 22a on the downstream side and a surplus portion 22b on the upstream side. As shown in FIG. 4, it is conveyed toward the surface bonding drum 44.

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

A guide member 60 is provided between the cutting drum 40 and the cutting joining drum 42 and the surface joining drum 44. The guide member 60 guides the old and new films 22 and 32 after cutting to the joining position (see FIG. 4), and the old and new films 22 and 32 after cutting are the old films 22 formed by cutting. The rear end (rear end of the product portion 22a) and the tip of the new film 32 formed by cutting (the tip of the product portion 32a) are abutted against each other and guided to the joining position shown in FIG. The guide member 60 has an arcuate guide surface facing the cutting and joining drum 42, and the guide surface is coated with fluororesin or the like to reduce the frictional resistance between the old and new films 22 and 32.

A surface bonding tape 72 is arranged 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. One side of the surface bonding tape 72 is an adhesive surface, and the surface bonding tape 72 is adsorbed on the outer peripheral surface of the surface bonding drum 44 with the adhesive surface facing 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 rotating as the rear end of the product portion 22a of the old film 22 and the tip of the product portion 32a of the new film 32 approach each other, and as shown in FIG. The surface bonding tape 72 is attached by pressing the surface bonding tape 72 from the surface side (lower side in the drawing) to the range including the portion (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 tip of the product portion 32a of the new film 32 after cutting are joined from the surface side.

In this way, after the old and new films 22 and 32 are joined from the surface side, as shown in FIG. 5, the product part 32a of the new film 32 is the surface joining drum 44 together with the product part 22a of the old film 22. It is attracted to the outer peripheral surface, moves with the rotation of the front surface joining drum 44, and is conveyed toward the back surface joining drum 46. On the other hand, the surplus portion 22b of the old film 22 located on the back surface side (upper side in the drawing) of the product portion 32a of the new film 32 remains adsorbed on the cutting joining drum 42 as the cutting joining drum 42 rotates. It is separated from the product part 32a of the new film 32.

A back surface bonding tape 82 is arranged on the outer peripheral surface of the back surface bonding drum 46. An intake port (not shown) is formed on the outer peripheral surface of the back surface joining drum 46, and the back surface bonding tape 82 is attracted to the outer peripheral surface of the back surface bonding drum 40 by being sucked into the intake port. ing. One side of the back surface bonding tape 82 is an adhesive surface, and the adhesive surface is attracted to the outer peripheral surface of the back surface bonding drum 46 with the adhesive surface facing outward. The back surface bonding tape 82 is automatically supplied onto the outer peripheral surface of the back surface bonding drum 46 by a back surface bonding tape supply device (not shown).

The back surface joining drum 46 rotates as the rear end of the product portion 22a of the old film 22 and the abutting portion (the portion joined by the front surface joining tape 72) of the product portion 32a of the new film 32 approach each other. Is started, and as shown in FIG. 5, the back surface bonding tape 82 is pressed from the back surface side to the range including the butt portion (sandwiched between the front surface bonding drum 44 and the back surface bonding drum 46) for the back surface. Attach 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 surface side.

As a result, as shown in FIG. 6, the rear end of the old film 22 after cutting, that is, the rear end of the product portion 22a of the old film 22, and the tip of the new film 32 after cutting, that is, the product portion of the new film 32. The tip of 32a is joined from both the front surface side and the back surface side. In the process of this joining, the surplus parts 22b and 32b of the old and new films 22 and 32 separated from the product parts 22a and 32a of the old and new films 22 and 32 after the separation (or of the old and new films 22 and 32). It is removed after joining).

As described above, in the butt joining device 10, as shown in FIG. 7 (A), the old and new films 22 and 32 are overlapped (overlapping step), and in this state, as shown in FIG. 7 (B). The old and new films 22 and 32 are cut (cutting step). By this cutting, the old film 22 is divided into a product portion 22a on the downstream side and a surplus portion 22b on the upstream side. Further, by this cutting, the new film 32 is divided into a surplus portion 32b on the downstream side and a product portion 32a on the upstream side.

After that, 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. 3D, 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 tip of the product portion 32a of the new film 32 (formed by cutting). With the tip of the new film 32 abutted), straddle the rear end of the product part 22a of the old film 22 and the tip of the product part 32a of the new film 32, and attach the bonding tape for the surface from the surface side to the abutted part. 72 is attached, and the old and new films 22 and 32 are joined from the surface side (surface joining step).

Further, after this, as shown in FIG. 7 (E), 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). Then, as shown in FIG. 3F, the back surface bonding tape 82 is attached to the abutting portion from the back surface side across the rear end of the product portion 22a of the old film 22 and the tip of the product portion 32a of the new film 32. The old and new films 22 and 32 are attached and joined from the back surface side (back surface joining step).

When the old and new films 22 and 32 are joined by the above-mentioned method, they are sandwiched between the cutting step and the joining step (in this embodiment, the surface joining step), that is, between the cutting drum 40 and the cutting joining drum 42. After the old and new films 22 and 32 are cut in a superposed state (see FIGS. 3 and 7 (B)), the joining positions (FIG. 4, FIG. 7 (C) and FIG. 7 (D) are joined via the guide member 60. ), The rear end of the product portion 22a of the old film 22 and the tip of the product portion 32a of the new film 32 are abutted against each other.

In this transfer, the product portion 32a of the new film 32 is transported in a state of being overlapped with the surplus portion 22b of the old film 22 (see FIGS. 3 and 4). However, the surplus portion 22b of the old film 22 is adsorbed on the outer peripheral surface of the cutting and joining drum 42 and is conveyed along with the rotation of the cutting and joining drum 42, but the product part 32a of the new film 32 is the old film 22. As shown in FIG. 8, the product portion 32a of the new film 32 is displaced, or as shown in FIG. 9, the product portion 32a of the new film 32 is rolled up because it is conveyed along with the surplus portion 22b of the new film 32. It may end up. In such a case, the surface bonding tape 72 also adheres to the surplus portion 22b of the old film 22, making it difficult to remove the surplus portion 22b of the old film 22. Further, if the product portion 32a of the new film 32 is displaced or curled up in a large amount, the old film 22 and the new film 32 may not be joined.

In order to prevent such a problem, the butt joining device 10 of the present invention is provided with a sprayer 90 (adhesive supply mechanism) as shown in FIGS. 1 to 6. Then, as shown in FIGS. 2 and 10, the atomizer 90 temporarily (separably) adheres the old and new films 22 and 32 between the old and new films 22 and 32. In the present embodiment, it is supplied by spraying a liquid (more specifically, water). That is, before the above-mentioned stacking step, an adhesive supply step for supplying the adhesive 92 is provided between the old and new films 22 and 32.

In FIG. 2, the sprayer 90 moves in the spray position located between the old and new films 22 and 32 and in the width direction (front side (or back side) of the old and new films 22 and 32) from the spray position. It is installed in the machine frame 48 so that it can be moved between the old and new films 22 and 32 and the retracted position. Then, the sprayer 90 moves to the spraying position when joining the old and new films 22 and 32, sprays the adhesive 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 so as to be movable between the spray position and the retracted position, but the atomizer 90 is fixed to the retracted position (outside the width direction of the old and new films 22 and 32), and the old and new from here. Adhesive 92 may be sprayed between the films 22 and 32.

Further, spraying conditions such as the particle size of the adhesive 92 to be sprayed and the amount of the adhesive 92 to be sprayed (total amount of spray and spray amount per unit time (product of spray amount and spray time per unit time)). However, in the present embodiment, the particle size before contacting the old and new films 22 and 32 is 20 μm or less, and the adhesive 92 formed after contacting the old and new films 22 and 32. The spraying conditions are determined so that the thickness of the layer (average thickness) is 1 μm or less.

Further, the range (spray range) for spraying the adhesive 92 can be appropriately set, but the adhesive 92 is an old film during the period from the cutting step to the joining step (surface joining step) (see FIGS. 3 and 4). It is supplied to enhance the adhesiveness between the surplus portion 22b of 22 and the product portion 32a of the new film 32, and to prevent the product portion 32a of the new film 32 from being displaced or curled. Therefore, 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 downstream of the planned cutting position 94. The upstream side (that is, the side where the product portion 32a of the new film 32 exists) has a wider range than the side (see FIGS. 7 (A), 7 (B), and 10). Further, in the present embodiment, the spray range of the adhesive 92 in the width direction of the old and new films 22 and 32 is set to the entire width direction of the old and new films 22 and 32.

As described above, according to the present invention, by supplying the adhesive 92 between the old and new films 22 and 32, the adhesiveness when the old and new films 22 and 32 are superposed can be improved. That is, the problem that the new film 32 is displaced or rolled up between the cutting step and the joining step (see FIGS. 8 and 9) is prevented, and smooth (smooth) joining is possible.

Further, in the present embodiment, since a liquid is used as the adhesive body 92 and the liquid is supplied by spraying the liquid, the adhesive body 92 can be easily supplied and the new film 32 can be easily prevented from being displaced or rolled up. Further, in the present embodiment, since water is used as the adhesive 92, the surplus portions 22b and 32b of the old and new films 22 and 32 are used as product parts as compared with the case where, for example, a commercially available adhesive is used as the adhesive. It is easy to separate them from the 22a and 32a (release the bonded state of the old and new films 22 and 32 by the adhesive 92), and the smooth joining is not hindered. Further, since water, that is, a liquid that vaporizes without heating is used as the adhesive 92, the adhesive such as a heating device or a wiping device is removed as compared with the case where a liquid that does not vaporize without heating is used as the adhesive. It is possible to easily prevent the new film 32 from being displaced or curled up without providing a dedicated device or process for the purpose.

The present invention is not limited to the above embodiment, and the detailed configuration can be changed as appropriate. For example, in the above embodiment, the example of joining the film on both the front surface side and the back surface side has been described, but the film may be joined on one side (either the front surface side or the back surface side). Further, the thickness of the film to be joined may be any thickness. However, the present invention is more effective when applied to a device or method for joining thin films (for example, having a thickness (average thickness) of 25 μm or less) that is prone to slippage or curling.

Further, in the above embodiment, the spray range of the adhesive in the width direction of the film has been described as the entire width direction of the film, but only a part of the width direction of the film may be the spray range of the adhesive. However, when only a part of the adhesive is sprayed in the width direction in this way, it is preferable that the sprayed range includes the most downstream portion of the planned cutting positions 94 (see FIGS. 7 and 10). ..

That is, in the above embodiment, in order to improve the sharpness, the cutter 50 is tilted by an angle θ with respect to the width direction of the cutting drum 40, and the old and new films 22 and 32 are tilted by an angle θ with respect to the width direction. It is cut in the state, that is, the planned cutting position 94 has a long line shape in the width direction when the angle θ is tilted, and one end of the planned cutting position 94 in the width direction is located on the downstream side and the other end is. Located on the upstream side. In such a case, the spray range is the range including one end in the width direction of the planned cutting position 94 (the most downstream part of the planned cutting position 94), that is, the range including the leading portion when being transported. As a result, the problem of misalignment and curling can be prevented more effectively as compared with the case where spraying is performed on other areas.

Further, in the above embodiment, the example of spraying and supplying the adhesive has been described, but the adhesive may be supplied by a method other than spraying, such as applying and supplying the adhesive. Further, although the example of using water that vaporizes without heating as the adhesive has been described, a liquid other than water that vaporizes without heating may be used as the adhesive. Further, as the adhesive, a liquid that vaporizes by heating may be used. Further, the gas vaporized by the adhesive is sent between the old and new films 22 and 32, and this gas is condensed on the surfaces of the old film 22 and the new film 32 to form an adhesive between the old and new films 22 and 32. May be supplied.

Further, the double-sided tape 102 may be used as the adhesive as in the butt joining device 100 shown in FIG. In FIG. 11, the butt joining device 100 includes a sticking device 104 (adhesive body supply mechanism) that supplies a double-sided tape 102 having adhesive layers formed on both sides as an adhesive between the old and new films 22 and 32. .. In the description using the drawings after FIG. 11, the same members as those in the above-described embodiment are designated by the same reference numerals and the description is omitted.

The sticking device 104 is movably provided between a sticking position located between the old and new films 22 and 32 and a retracted position retracted from the sticking position to the front side (or back side) of FIG. There is. Then, the sticking device 104 sticks (supplies) the double-sided tape 102 to the old film 22 at the sticking position, and then retracts the double-sided tape 102 to the retracted position. The double-sided tape 102 may be attached (supplied) to the new film 32. Further, the double-sided tape 102 may be manually attached (supplied) to the old film 22 or the new film 32 in advance without providing the attaching device 104.

As shown in FIG. 12, in this example, the double-sided tape 102 is supplied (attached) to the upstream side of the planned cutting position 94. Further, in this example, as the double-sided tape 102, the adhesive strength of the surface on the old film 22 side is higher than the adhesive strength of the surface on the new film 32 side. By doing so, when the surplus portion 22b of the old film 22 is separated from the product portion 32a of the new film 32, the double-sided tape 102 is attached to the surplus portion 22b of the old film 22 and is separated from the product portion 32a of the new film 32. Therefore, it is possible to save the trouble of removing the double-sided tape 102 from the product portion 32a of the new film 32 later, and smooth joining becomes possible.

As shown in FIG. 13, the double-sided tape 102 may be attached to 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 layer provided on one side of the double-sided tape 102 and the adhesive layer provided on the opposite side have different adhesive strengths. Further, if the adhesive layer on the old film 22 side has a weaker adhesive force than the adhesive layer on the new film 32 side, the double-sided tape 102 remains on the product portion 32a of the new film 32, so that the entire portion is the back surface bonding tape. It is preferable to determine the size and sticking range of the back surface bonding tape 82 and the double-sided tape 102 so as to be covered by the 82. On the contrary, 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 part 22a of the old film 22, so that the entire surface is the surface. It is preferable to determine the size and sticking 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 so, the double-sided tape 102 (adhesive layer) is not exposed (not exposed to the surface) from the product parts 22a and 32a of the old and new films 22 and 32 joined, so that process contamination can be reduced.

Further, in the above embodiment, two rolls, an old roll around which the old film is wound and a new roll around which the new film is wound, are supported by a common device (turret device), and from this common device. The example of supplying the old and new films to the butt-joining device was explained, but the device that supports the old roll and the device that supports the new roll are separately provided, and the old and new films are butt-joined from different devices. May be supplied. Further, the example of supplying the film wound in the roll form to the butt-joining device has been described. For example, the strip-shaped film manufactured in the film manufacturing process is not wound in the roll form and is butt-joined as it is. May be supplied to.

10,100 Butt joining device 12 Turret device 14 Cutting joining unit 16 Turret arm 18 Strut 20, 26, 36 Axis 22 Old film 22a Product part 22b Surplus part 24 Old roll 32 New film 32a Product part 32b Surplus part 34 New roll 40 Cutting Drum 42 Cutting and joining drum (cutting drum, pasting drum)
44 Surface joining drum (pasting drum)
46 Joining drum for back side (pasting drum)
48 Machine frame 50 Cutter (cutting blade)
60 Guide member 52 Cut part 72 Front surface bonding tape 82 Back surface bonding tape 90 Atomizer (adhesive supply mechanism)
92 Adhesive 94 Scheduled cutting position 102 Double-sided tape (adhesive)
104 Sticking device (adhesive supply mechanism)

Claims (12)

In the butt joining method in which the rear end of the strip-shaped old film rewound from the old roll and the tip of the new strip-shaped film rewound from the new roll are butted with a joining tape.
The overlay step of overlaying the old and new films and
A cutting step for cutting the old and new films overlapped in the overlapping step,
A new film separation step for separating the new film from the old film on the downstream side of the cutting position of the old and new films cut in the cutting step,
An old film separation step for separating the old film from the new film on the upstream side of the cutting position of the old and new films cut in the cutting step,
A joining step of joining the rear end of the old film formed by the cutting and the tip of the new film formed by the cutting with the joining tape.
A butt-joining method comprising: an adhesive supply step for supplying an adhesive for separably adhering the old and new films between the old and new films to be overlapped in the overlay step. The butt joining method according to claim 1, wherein the adhesive body is supplied to at least a part of the old and new films in the width direction. 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 body 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 is a double-sided tape having adhesive layers formed on both sides. The butt joining method according to any one of claims 1 to 6, wherein the adhesive body is supplied to a range including the upstream side and the downstream 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 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 adhesive strength between the adhesive layer on the surface on the old film side and the adhesive layer on the surface on the new film side. In a butt joining device that joins with a joining tape with the rear end of the strip-shaped old film rewound and transported from the old roll and the tip of the strip-shaped new film rewound and transported from the new roll butted against each other.
The stacking mechanism that stacks the old and new films and
A cutting mechanism for cutting the old and new films superposed by the superimposing mechanism, and
A new film separation mechanism that separates the new film from the old film on the downstream side of the cutting position of the old and new films cut by the cutting mechanism.
An old film separation mechanism that separates the old film from the new film on the upstream side of the cutting position of the old and new films cut by the cutting mechanism.
A joining mechanism for joining the rear end of the old film formed by the cutting and the tip of the new film formed by the cutting with the joining tape.
A butt-joining device including an adhesive supply mechanism for supplying an adhesive for separably adhering the old and new films between the old and new films overlapped in the overlay mechanism. In the butt joining method in which the rear end of the strip-shaped old film rewound from the old roll and the tip of the new strip-shaped film rewound from the new roll are butted with a joining tape.
The overlay step of overlaying the old and new films and
A cutting step for cutting the old and new films overlapped in the overlapping step,
A joining step of joining the rear end of the old film formed by the cutting and the tip of the new film formed by the cutting with the joining tape.
An adhesive supply step for supplying an adhesive for separably adhering the old and new films is provided between the old and new films to be overlapped in the overlay step.
The butt joining method in which the adhesive is a liquid. In the butt joining method in which the rear end of the strip-shaped old film rewound from the old roll and the tip of the new strip-shaped film rewound from the new roll are butted with a joining tape.
The overlay step of overlaying the old and new films and
A cutting step for cutting the old and new films overlapped in the overlapping step, and a cutting step.
A joining step of joining the rear end of the old film formed by the cutting and the tip of the new film formed by the cutting with the joining tape.
An adhesive supply step for supplying an adhesive for separably adhering the old and new films is provided between the old and new films to be overlapped in the overlay step.
The adhesive is a double-sided tape having adhesive layers formed on both sides.
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 double-sided tape is a butt-bonding method in which the adhesive layer on the surface on the old film side and the adhesive layer on the surface on the new film side have different adhesive strengths.

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