JP2007062860A - Device and method for butt-joining web - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for butt-joining web capable of joining an old web with a new web, enhancing the joining accuracy and quality, and reducing the cost of the device and the down-time. <P>SOLUTION: In this method, the cutting and the butt-joining of an end of a web wound around an old roll 28 and an end of a web wound around a new roll 30 are performed. A fore-end of the web of the new roll is held while winding the web around a cutting drum 42, a portion in a vicinity of the end of the web of the old roll is held while winding the web of the old roll around a cutting and joining drum 44, and a joining tape is held by a joining drum 46. The cutting and joining drum 44 and the cutting drum 42 are rotated at the same speed as the web conveying speed. The webs of the old roll and the new roll are cut in an overlapping manner by a cutter 42B provided on a circumferential surface of the cutting drum. The webs of the old roll and the new roll are held to the circumferential surface of the cutting and joining drum, A joining tape 47 is adhered to the webs of the old roll and the new roll by the joining drum, and an embossed shape is formed on the downstream side of a joined part by the emboss zone. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a web butt-joining apparatus and method, and more particularly, to a web that joins end portions of old and new rolls of a sheet-like strip material (hereinafter referred to as “web”) such as plastic, paper, metal foil, etc. The present invention relates to a butt joining apparatus and method.

  2. Description of the Related Art Conventionally, techniques for obtaining various functional films by applying various coating liquids to the surfaces of butt-joined webs are known. At the time of such butt joining, it is common to affix the joining tape to the surface on which the coating liquid is applied in a state where the end portions of the web are abutted with each other. , Defects that cause turbulence (long streaks or thick coating portions) in the coating film are likely to occur.

  FIG. 15 is an enlarged view of a main part of the web in a bonded state for explaining this phenomenon. In FIG. 15, the old web 1 and the new web 2 are joined by the joining tape 3 in a butted state. And the coating liquid is apply | coated to the surface, being conveyed in the direction of the arrow, and the application layer 4 is formed. However, the coating layer 4 is disturbed by the level difference of the joining tape 3 downstream of the butt joint, and immediately after the joining tape 3, an extremely thin or uncoated portion and a subsequent thick coating portion are generated. Further, the non-uniform portion often contains bubbles 5.

In order to solve this, the applicant has proposed to roughen the surface of the web (for example, see Patent Document 1). And the above-mentioned problem can be solved by adopting this method.
JP 50-43140 A

  However, in the proposal of Patent Document 1, it is necessary to rewind the web wound in advance in a roll shape before the butt-joining of the web, perform the roughening treatment on the end, and rewind the web again. The problem remains that the work is very complicated.

  The present invention has been made in view of such circumstances, and it is possible to join an old web and a new web, improve joining accuracy and quality, and reduce apparatus cost and downtime. An object of the present invention is to provide a web butt-joining apparatus and method.

  In order to achieve the above-mentioned object, the present invention was wound around the end of the strip-like flexible support of the old roll and the new roll while running the strip-like flexible support wound around the old roll. In a web butt-joining method for cutting and butt-joining with the tip of a strip-shaped flexible support, the strip-shaped flexible support of the new roll is wound around a cutting drum and the new web is held by the cutting drum A step of holding the tip of the belt-like flexible support of the new roll by means, and winding the belt-like flexible support of the old roll around the cutting and joining drum, and holding the old web of the cutting and joining drum Means for holding the vicinity of the end of the belt-like flexible support of the old roll by means, holding the joining tape on the joining drum, and cutting and combining at the same speed as the transport speed of the belt-like flexible support. Joint While rotating the cutting drum at the same speed as the conveying speed of the belt-like flexible support, the tip of the cutting drum or the cutting and joining drum protrudes from the tip of the cylindrical portion. The step of cutting the belt-like flexible support of the old roll and the belt-like flexible support of the new roll with the cutting member provided, and the belt-like flexible support of the cut old roll The end portion of the body and the tip of the belt-like flexible support of the new roll are discarded, and the belt-like flexible support of the old roll and the belt-like flexible support of the new roll are cut. A step of holding the drum or the cutting / joining drum on the peripheral surface, and a band-like flexibility of the old roll held on the cutting drum or the peripheral surface of the cutting / joining drum by the joining tape held on the joining drum support The step of adhering to the belt-like flexible support of the new roll, and the belt-like flexible support adjacent to the cutting member, the cutting receiving member, or the holding tape holding portion adjacent to the downstream side in the rotational direction. Forming an embossed shape on the downstream side of the butt joint portion of the belt-like flexible support by an embossed zone formed of a set of a plurality of protrusions provided in an area having a predetermined width and substantially the same length as the width; A web butt-joining method is provided.

  In addition, for this purpose, the present invention supports the old roll and the new roll on which the belt-like flexible support is wound so that the roll can be rewound, and the turret means which can rotate at a predetermined angle, and the cylindrical shape of the peripheral surface A cutting member having a length approximately the same as the width of the strip-shaped flexible support provided at the tip of the portion, and a predetermined width having a length substantially the same as the width of the strip-shaped flexible support adjacent to the cutting member. An embossing zone comprising a set of a plurality of protrusions provided in the area, and a holding means for holding the tip of the belt-like flexible support of the new roll, and the belt-like flexible support is joined when the belt-like flexible support is joined. A cutting drum that can be rotated at the same speed as the conveying speed of the flexible support, a cutting receiving member having a length substantially the same as the width of the strip-shaped flexible support, and the end of the strip-shaped flexible support of the old roll Holding means for holding the vicinity of the portion, and contacting the belt-like flexible support Sometimes a cutting and joining drum that can rotate at the same speed as the transport speed of the belt-like flexible support, and a joining tape that can be peeled off, and transporting the belt-like flexible support when the belt-like flexible support is joined. A joining drum capable of rotating at the same speed as the speed, and conveying the belt-like flexible support member between the end of the belt-like flexible support member of the old roll and the tip of the belt-like flexible support member of the new roll. Provided is a web butt-joining apparatus characterized by performing cutting and butt-joining, and forming an embossed shape on the surface of the belt-like flexible support.

  In addition, for this purpose, the present invention supports the old roll and the new roll on which the belt-like flexible support is wound so that the roll can be rewound, and the turret means which can rotate at a predetermined angle, and the cylindrical shape of the peripheral surface A cutting member having substantially the same length as the width of the belt-like flexible support provided to protrude from the tip of the portion, and holding means for holding the tip of the belt-like flexible support of the new roll, A cutting drum capable of rotating at the same speed as the conveying speed of the belt-like flexible support at the time of joining the belt-like flexible support, a cutting receiving member having substantially the same length as the width of the belt-like flexible support, and the cutting An emboss zone comprising a set of a plurality of protrusions provided in an area having a predetermined width substantially the same as the width of the belt-like flexible support adjacent to the receiving member, and the belt-like flexible support of the old roll A belt-like flexible support having a holding means for holding the vicinity of the end portion A cutting and joining drum that can rotate at the same speed as the transport speed of the belt-like flexible support during joining, and a joining tape that can be peeled off, and the belt-like flexible support can be peeled off when the belt-like flexible support is joined. A joining drum that can rotate at the same speed as the conveyance speed, and while conveying the belt-like flexible support, the belt-like flexible support end of the old roll and the belt-like flexible support tip of the new roll A web butt-joining apparatus is provided that performs cutting and butt-joining, and forms an embossed shape on the surface of the belt-like flexible support.

  In addition, for this purpose, the present invention supports the old roll and the new roll on which the belt-like flexible support is wound so that the roll can be rewound, and the turret means which can rotate at a predetermined angle, and the cylindrical shape of the peripheral surface A cutting member having substantially the same length as the width of the belt-like flexible support provided to protrude from the tip of the portion, and holding means for holding the tip of the belt-like flexible support of the new roll, A cutting drum capable of rotating at the same speed as the conveying speed of the belt-like flexible support at the time of joining the belt-like flexible support, a cutting receiving member having substantially the same length as the width of the belt-like flexible support, and Cutting / joining provided with holding means for holding the vicinity of the end of the belt-like flexible support of the old roll, and capable of rotating at the same speed as the conveyance speed of the belt-like flexible support when joining the belt-like flexible support The drum and the bonding tape are detachably held, and the bonding tape An embossing zone comprising a set of a plurality of protrusions provided in an area having a predetermined width and substantially the same length as the width of the belt-like flexible support adjacent to the holding portion, and when the belt-like flexible support is joined A joining drum that can rotate at the same speed as the transport speed of the strip-shaped flexible support, and while transporting the strip-shaped flexible support, the end of the strip-shaped flexible support of the old roll and the new roll Provided is a web butt-joining apparatus characterized in that it cuts and butt-joins the front end of a belt-like flexible support, and forms an embossed shape on the surface of the belt-like flexible support.

  According to the present invention, a plurality of cutting members, cutting receiving members, or a plurality of portions provided in an area having a predetermined width and substantially the same length as the width of the strip-shaped flexible support adjacent to the downstream side in the rotation direction of the holding portion of the joining tape. Since the embossed zone is formed on the downstream side of the butt joint portion of the belt-like flexible support body by the emboss zone made up of a set of protrusions, the emboss shape can be formed on the web almost simultaneously with the butt joint of the web.

  Therefore, the butt joint of the webs enables the old web and the new web to be joined, the joining accuracy and quality can be improved, and the apparatus cost and downtime can be reduced.

  In other words, the surface of the web can be roughened almost simultaneously with the butt-joining of the web, the coating layer is disturbed by the level difference of the bonding tape, or an extremely thin or uncoated part occurs immediately after the bonding tape. Then, there is no problem that a subsequent thick coating portion is generated or bubbles are included in a non-uniform portion.

  In the present invention, the protrusion of the emboss zone is preferably a square frustum having a base length of 0.5 to 2 mm. If the protrusion has such a shape, the embossed shape formed on the web can be improved.

  Moreover, in this invention, it is preferable that the processus | protrusion of the said emboss zone is a square frustum whose apex length is 0.2-0.5 mm. If the protrusion has such a shape, the embossed shape formed on the web can be improved.

  As described above, according to the present invention, the old web and the new web can be joined, the joining accuracy and quality can be improved, and the apparatus cost and downtime can be reduced.

  A preferred embodiment (first embodiment) of a web butt joining apparatus and method according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a configuration diagram of a web butt joining apparatus 10 according to the present invention. In this web butt-joining apparatus 10, a support column 14 is erected on a base 12, and a trident turret arm 18 is rotatably supported on a turret shaft 16 at the tip of the support column 14. The turret arm 18 can rotate intermittently about the turret shaft 16 every 120 degrees.

  Further, roll shafts 20, 22, 24 are rotatably supported at the respective distal end portions of the turret arm 18, and are conveyed to two roll shafts 22, 24 among these roll shafts 20, 22, 24. An old roll 28 around which the old web 26 is wound and a new roll 30 around which the new web 80 (see FIGS. 5, 10, and 11) is wound are pivotally supported so as to be rewound.

  In addition, the new roll used next to the new roll 30 is pivotally supported by the remaining roll axis | shaft 20 which is not used. And each roll axis | shaft 20, 22, 24 is connected with the rotation drive source which is not shown in figure, and can rotate the new roll 30 at the same speed as the conveyance speed of the old web 26 at the time of the joining of the new and old web mentioned later. Yes. Further, the leading end of the new roll 30 is temporarily attached with an adhesive tape so that the leading end of the new web 80 does not come off the web former winding while the new roll 30 is rotating, and a leading end mark 32 is attached.

  A guide rail 34 is laid on the base 12 along the web conveyance direction, and a joining unit 36 is provided so as to be able to travel on the guide rail 34. As a result, the joining unit 36 can advance and retreat in the direction of the arrow 38 in the figure with respect to the turret arm 18.

  In the casing 40 of the joining unit 36, a cutting drum 42, a cutting and joining drum 44, and a joining drum 46 are rotatably supported by the respective rotation shafts 42A, 44A, 46A. The rotary shafts 42A, 44A, 46A are connected to a rotational drive source (not shown), and the cutting drum 42, the cutting and joining drum 44, and the joining drum 46 are connected at the same speed as the conveying speed of the old web 26 during web joining. It can be rotated in the directions of arrows 48, 50, and 52.

  As shown in FIG. 2, the outer periphery of the cutting drum 42 is formed of an elastic material such as rubber, and a cutter 42B is provided at the approximate center of the outer periphery. 42C is formed and connected to a suction device (not shown) through a hollow shaft portion 42D. Details of the peripheral portion of the cutter 42B will be described later.

  The cutting and joining drum 44 has a contact plate 44B which is a cutting receiving member on the front side in the rotational direction of the outer peripheral portion thereof, and shear force is generated by the contact between the contact plate 44B and the cutter 42B of the cutting drum 42. The web (old web 26, new web 80) can be cut. Further, a suction disk 44C is formed on the outer peripheral portion on the rear side in the rotation direction of the cutting and joining drum 44, and connected to a suction device (not shown) via a hollow shaft portion 44D.

  The joining drum 46 has an adsorbing plate 46B that adsorbs the back surface of the joining tape 47 so that the back surface of the joining tape 47 can be peeled off, and is connected to a suction device (not shown) via a hollow shaft 46C. Further, guide rollers 42E and 44E are attached to the cutting drum 42 and the cutting / joining drum 44 so as to support the web (old web 26) between the old roll 28 and the pass roller 60.

  In a substantially triangular space surrounded by the rotating outer periphery of each drum 42, 44, 46, a guide having a triangular cross section for guiding the web (old web 26, new web 80) at the time of joining so as not to deviate from the web conveyance path. A member 54 is provided. The guide member 54 is attached to the casing 40 (see FIG. 1).

  As shown in FIG. 3, a removal unit 56 is provided near the upper portion of the cutting and joining drum 44 to remove the remaining portion of the old web 26 that is cut during joining from the web conveyance path. The removal unit 56 has a space slightly larger than the thickness of the web along the arc-shaped guide plate 56A, and a plurality of rotating rollers 56B, 56B,... Are rotatably disposed between the guide plate 56A. A removal passage 58 is formed.

  The plurality of rotary rollers 56B, 56B,... Are connected to a rotation drive source (not shown), and are rotated in a direction opposite to the rotation direction of the cutting / joining drum 44 and by the rotational speed (circumferential speed) of the cutting / joining drum 44. Is designed to rotate faster. As a result, the remaining portion of the old web 26 that has been cut and sucked and held by the suction disk 44C of the cutting and joining drum 44 is sandwiched between the cutting and joining drum 44 and the plurality of rotating rollers 56B, 56B. Scooped up and removed from the web transport path.

  As shown in FIG. 1, a roll outer diameter sensor 64 that measures the outer diameter of the new roll 30 is attached to the wall surface 62 located above the new roll 30. The outer diameter of the new roll 30 can be measured by reflecting the light beam 66 from the roll outer diameter sensor 64 on the outer peripheral surface of the new roll 30 and measuring the distance to the outer periphery of the new roll 30.

  A tip mark sensor 68 is provided at the tip of the guide rail 34 on the turret arm 18 side. The tip mark sensor 68 detects the tip mark 32 of the new roll 30 when the turret arm 18 is rotated 120 degrees and the new roll 30 is moved to the position shown in FIG. .

  Further, a terminal mark sensor 74 for detecting a terminal mark 72 attached to a terminal portion of the old roll 28 is attached to the wall surface 70 above the old roll 28 moved to the position shown in FIG. The signals of these sensors 64, 68, 74 are input to a controller (not shown) to control the moving distance of the joining unit 36 and the rotation timing of the drums 42, 44, 46.

  Next, details of the peripheral portion of the cutter 42B in the cutting drum 42 will be described. FIG. 4 is a cross-sectional view of the main part of the cutting drum 42. In the peripheral portion of the cutter 42B in the cutting drum 42, a cylindrical portion of the peripheral surface is formed by the cutting drum main body 42F and the insert 42G fitted in the recessed portion formed on the surface of the cutting drum main body 42F. .

The cutter 42B is provided with a tip protruding from the cylindrical portion, and is fixed at an inclination angle θ1 with respect to the radius CL direction of the cylindrical portion. The inclination angle θ1 preferably has a relationship of 20 degrees ≧ θ1 ≧ cos ⁻¹ (R / (R + H1)) where R is the radius of the peripheral surface and H1 is the protrusion amount of the tip of the cutter 42B. .

  The cutter 42B is fixed by being sandwiched between the cutting drum main body 42F and the insert 42G. The cutting drum main body 42F and the insert 42G on both sides of the cutter 42B are flush with each other.

  Buffer members 42H and 42I made of cellular rubber are provided on both sides of the cutter 42B. The buffer members 42H and 42I preferably have a hardness specified by JIS K 6301 of 50 or less.

  The protrusion amount H1 of the cutter 42B from the surfaces of the cutting drum main body 42F and the insert 42G is preferably in the range of 3 to 5 mm. Further, the protrusion amount H2 of the cutter 42B from the circumferential surface of the cutting drum main body 42F has a range of web thickness (total thickness of the old web 26 and the new web 80) plus 0.05 to 0.1 mm. preferable.

  Next, the arrangement of the cutter 42B in the width direction of the cutting drum 42 will be described. 5A and 5B are diagrams for explaining this relationship, in which FIG. 5A is a plan view of the cutting drum 42, and FIG. 5B is a plan view showing a web-butting state. In addition, in (A), illustration of the buffer members 42H, 42I, etc. is omitted.

  As shown in FIG. 5A, the cutter 42 </ b> B has an inclination angle α of 0.5 to 5 degrees with respect to the axial direction of the cutting drum 42. As a result, as shown in FIG. 5B, the web joining lines after the butt joining (the end 26A of the old web 26 and the end 80A of the new web 80) are perpendicular to the web supply direction HL. However, butt joining is performed so as to form an inclination angle α of 0.5 to 5 degrees.

Next, the cutter 42B will be described. Preferably the Vickers hardness _{H V} of the cutter 42B is 600 to 1000, and more preferably _{H V} is 750 to 800. Thus, lower than the Vickers hardness _{H V} of hardness _{H V} is the contact plate 44B of the cutter 42B (see FIG. 2 described above) (described below), less damage to the contact plate 44B is, the contact plate 44B The service life can be greatly extended.

Vickers hardness _{H V} of the abutment plate 44B which is a cutting receiving member is preferably 1,000 or more. Thus, hard and abutment plate 44B cutting edge abuts the cutter 42B, especially if the Vickers hardness H _V of 1000 or more, hardly occurs a problem that the cutting edge of the cutter 42B is or with eating the contact plate 44B, the former When the web 26 and the new web 80 are cut in a state of being overlapped, the drawback of generating chips can be greatly improved. As the material of the contact plate 44B, a material whose hardness is increased by quenching of nitrided steel or carburizing can be preferably used.

  Further, a plating layer having a thickness of 10 to 30 μm is preferably formed on the surface of the contact plate 44B. With the plating layer having such a thickness, it is possible to improve the defect that the plating layer is turned up or damaged, and the life of the contact plate 44B can be greatly extended. For this plating layer, a hard chrome plating can be preferably employed.

  As described above, the cutter 42B is fixed at an inclination angle θ1 with respect to the radius CL direction of the cylindrical portion. Thus, since the cutter 42B is fixed in a cantilevered state with an inclination angle θ1 with respect to the radius CL direction, when it comes into contact with the web, the web is cracked and cutting is started. By having this inclination angle θ1, the locus of the blade edge until the tip of the cutter 42B comes into contact with the web and further contacts the cutting and joining drum 44 almost coincides with the direction of the crack at the start of cutting. The surface is clean without cutting.

  In addition, since buffer members 42H and 42I having an appropriate hardness are provided on both sides of the cutter 42B, the members are firmly held by the buffer members 42H and 42I. However, the web does not generate compressive stress due to compressive deformation. There is no cutting distortion in the web, and it can be made difficult to generate chips when the web is cut.

  At this time, it is important that the inclination angle θ1 of the cutter 42B is inclined to the rotation direction side (the inclination angle θ1 is formed on the right side with respect to the radius CL direction) as shown in FIG.

  4, a plurality of protruding embossing dies 42K, 42K,... Are formed adjacent to the cutter 42B. As shown in a plan view in FIG. 6, the embossing molds 42K, 42K,... Form embossed zones provided in an area having a predetermined width (in the case of the figure, two rows) that is substantially the same length as the width of the web. Yes.

  This embossed die 42K has a quadrangular frustum shape. The length of the apex side of this quadrangular pyramid is preferably 0.2 to 0.5 mm. When the top side length is less than 0.2 mm, it is not preferable because the web may be penetrated when the embossed shape is transferred to the web. When the top side length exceeds 0.5 mm, the web is not preferable. This is not preferable because the height of the embossed shape to be transferred is insufficient.

  The apex angle of this quadrangular pyramid is preferably 45 to 90 degrees. When the apex angle is less than 45 degrees, the embossed shape may be transferred to the web, which may be penetrating the web. When the apex angle exceeds 90 degrees, the embossed shape transferred to the web is not preferable. This is not preferable because the height is insufficient.

  Moreover, when it calculates from the above conditions, it is preferable that the base length of an embossed shape is 0.5-2 mm. If the protrusion has such a shape, the embossed shape formed on the web can be improved.

  The quadrangular pyramid refers to a solid obtained by cutting the quadrangular pyramid on a plane parallel to the bottom surface and removing the portion including the apex.

  By the way, although the shape of the embossing die 42K is preferably a quadrangular frustum, it does not hinder the adoption of other frustum shapes (triangular frustum, frustum, etc.). Moreover, it does not prevent the adoption of a cone shape other than the other frustum shapes.

  Here, a cone is a curved surface (or one of several planes) formed by a straight line connecting a point that goes around the circumference of a closed curve (or broken line) on a plane and a fixed point outside the plane. A part of the space surrounded by (part), which is a kind of cone or pyramid.

  Next, the operation of the web butt joining apparatus 10 of the present invention configured as described above will be described. As shown in FIG. 1, the old web 26 unwound from the old roll 28 passes between the cutting and joining drum 44, the cutting drum 42, and the joining drum 46 while being supported by the pass roller 60. And sent to a coating process and a processing process (not shown). At this time, in order to prevent the bending of the old web 26, the middle of the old web 26 is supported by the guide rollers 42 </ b> E and 44 </ b> E of the cutting drum 42 and the cutting and joining drum 44.

  In the state of FIG. 1, while the old web 26 is being rewound, the outer diameter of the new roll 30 is measured by the roll outer diameter sensor 64, and the signal is input to the controller (not shown). When the outer diameter of the new roll is measured, the turret arm 18 rotates 120 degrees, the old roll 28 and the new roll 30 move to the positions shown in FIG. 7, and the new roll input to the controller The joining unit 36 moves on the guide rail 34 in the direction of the arrow 78 in the drawing based on the moving distance calculated from the outer diameter dimension, and stops at a position close to the outer peripheral surface of the new roll 30.

  Next, the end mark sensor 74 detects the end mark 72 attached to the old roll 28, and a signal notifying that the web amount of the old roll 28 has become a predetermined amount or less is input to the controller. Then, the controller gives an instruction to the drive source that drives the rotating shaft 22 of the new roll 30 to rotate the new roll 30 counterclockwise, and accelerates to the same speed as the conveying speed of the old web 26 (for example, 100 m / min or more). To do.

  Next, when the tip mark detector 68 detects the tip mark 32 of the new roll 30 and a signal is input to the controller, the controller rotates the rotating shafts 42A, 44A, 46A of the drums 42, 44, 46. An instruction is given to the drive source to rotate the drums 42, 44, 46 at the same speed as the conveying speed of the old web 26, and the suction disks 42 C, 44 C, 46 B of the drums 42, 44, 46 are brought into a suction state.

  At this time, the cutting drum 42 starts to rotate at a timing at which the leading end of the new roll 30 is pulled out at the same speed as the conveyance speed of the old web 26, and the leading end of the new roll 30 is absorbed by the suction disk 42 </ b> C of the cutting drum 42. Aspirate part.

  That is, as shown in FIG. 8, when the outer peripheral speed of the new roll 30 is V and the time for moving the distance A from the leading end detection position B of the new roll 30 to the drawing position C is t seconds, FIG. As shown in the graph, the cutting drum 42 is rotationally driven at a timing that becomes equal to the outer peripheral speed V of the new roll 30 t seconds after the start of rotation.

  Thereby, the web front-end | tip part of the new roll 30 can be reliably pulled out with the suction disk 42C of the cutting drum 42. FIG. Similarly, rotation of the cutting and joining drum 44 and the cutting drum 42 is started at the timing of cutting and joining the web, which will be described later.

  Then, when the cutting drum 42 and the cutting / joining drum 44 are rotated to the angle shown in FIG. 10, the old web 26 and the new web 80 are overlapped and sandwiched between the cutting drum 42 and the cutting / joining drum 44. The old and new webs 26 and 80 are cut by the cutter 42B of the drum 42 and the contact plate 44B of the cutting and joining drum 44.

  At this time, since the cutter 42B is fixed in a cantilevered state with an inclination angle θ1 with respect to the radius CL direction, the cutter 42B is cut when it comes into contact with the web (the overlapped body of the old web 26 and the new web 80). The amount of bending is appropriate in the traveling direction. Further, since the buffer members 42H and 42I having an appropriate hardness are provided on both sides of the cutter 42B, it is firmly held by the buffer members 42H and 42I. However, since the web is not subjected to compressive deformation, there is no compression strain. Since the web being cut is not distorted, it is possible to make it difficult to generate chips when the web is cut.

  Further, as shown in FIG. 5 described above, the cutter 42B is provided with an inclination angle α of 0.5 to 5 degrees with respect to the axial direction of the cylindrical portion. The web is cut so that the cutting line proceeds toward the side. Accordingly, the cutting accuracy is improved by such cutting, and the cut ends are smoothly fed to the joining drum 46 sequentially. As a result, the joining accuracy is improved.

  In FIG. 10, at the time of cutting, the leading end of the new web 80 after being cut is quickly taken into the gap between the cutting drum 42 and the cutting and joining drum 44 that rotate in opposite directions, and is guided by the guide member 54. Move in the transport direction. Furthermore, since the leading end of the new web 80 is fed to the leading end side by the rotation of the new roll 30, it does not come off from the cutting portion.

  On the other hand, the end of the old web 26 after cutting moves in the web conveyance direction while being sandwiched between the cutting and joining drum 44 and the joining drum 46. As a result, the end of the old web 26 after cutting and the front end of the new web 80 after cutting are reliably conveyed to the joining position in a state of being abutted.

  Next, when the cutting drum 42 and the cutting and joining drum 44 are further rotated from the state shown in FIG. 10, the old web 26 and the new web 80 are overlapped and sandwiched between the cutting drum 42 and the cutting and joining drum 44. The emboss shape is transferred to the old and new webs 26 and 80 by the emboss dies 42K, 42K... 42 and the contact plate 44B of the cutting and joining drum 44.

  Next, when the drums 42, 44, 46 are rotated to the angle shown in FIG. 11, the old and new webs 26, 80 are sandwiched between the cutting and joining drum 44 and the joining drum 46, and the suction plate of the joining drum 46 is used. The butted portions of the old and new rolls 26 and 80 are joined by the joining tape 47 sucked and held by 46B.

  Then, the drums 42, 44, and 46 that have been joined rotate to the original positions and stop, and the suction states of the suction disks 42B, 44B, and 46B of the drums 42, 44, and 46 are released. Further, the joining unit 36 moves on the guide rail 34 and retracts to the original position, and the conveyance of the web of the new roll 30 is started again in the state of FIG.

  Further, the remaining cutting portion of the old web 26 cut at the time of cutting is removed from the conveyance path by the removing unit 56 shown in FIG. 3, while the remaining cutting portion of the new web 80 is sucked and held by the suction disk 42B of the cutting drum 42. The cutting drum 42 is moved to the stop position, and the suction of the suction disk 42B is released, so that the cutting drum 42 falls from its own weight. Thus, the butt joining of the old and new webs 26 and 80 is completed.

  Next, a second embodiment of the web butt-joining apparatus of the present invention will be described with reference to FIG. The same members as those in the first embodiment described above will be described with the same reference numerals.

  As shown in FIG. 12 (corresponding to FIG. 4 of the first embodiment), in the cutting drum 42, the cutting member block 42J is fitted into a recessed portion formed on the surface of the cutting drum main body 42F, and the cutting member block A cylindrical portion of the circumferential surface of the cutting drum 42 is formed so that the surface of 42J and the surface of the cutting drum main body 42F are flush with each other.

  The tip of the cutter 42B protrudes from the surface of the cutting member block 42J. The protrusion amount H3 of the cutter 42B from the surface of the cutting member block 42J may be set substantially the same as H2 of the first embodiment. In the present embodiment, no buffer member is provided on both sides of the tip of the cutter 42B, but a buffer member may be provided as in the first embodiment.

The material of the cutter 42B (Vickers hardness H _V , etc.), the inclination angle θ1 of the cylindrical portion of the cutter 42B with respect to the radius CL direction, the inclination angle α of the cutter 42B with respect to the axial direction of the cutting drum 42, etc. What is necessary is just to set substantially like a form.

  The shape and arrangement of the emboss dies 42K, 42K... May be substantially the same as in the first embodiment.

  As a method of fixing the cutting member block 42J to the cutting drum main body 42F, various known means such as fixing by a screw member (not shown) and a burning spring using thermal expansion can be adopted.

  According to the present embodiment, the cutter 42B provided on the cutting drum 42 is embedded in the cutting member block 42J, and the cutting member block 42J is flush with the recess formed in the cylindrical portion of the surface of the cutting drum main body 42F. Therefore, by simply exchanging the cutting member block 42J, the cutter 42B can be replaced and the blade edge position can be finely adjusted, the device mechanism can be simplified, and the joining accuracy and quality can be improved. It can improve and reduce downtime.

  That is, a plurality of cutting member blocks 42J are prepared in which the shape of the embossing dies 42K, 42K..., The protruding amount H3, the inclination angle θ1, the inclination angle α, etc. are changed. Accordingly, if a configuration in which the cutting member block 42J is replaced with an optimum one is adopted, the joining accuracy and quality can be improved, and downtime can be reduced.

  Next, the effect of the web butt joining apparatus 10 of the present invention will be described.

  FIG. 13 is an enlarged view of the main part of the web in a bonded state for explaining this effect, (A) is a front view, and (B) is a plan view. In FIG. 13, the old web 26 and the new web 80 are joined by the joining tape 47 in a butted state. Then, while being conveyed in the direction of the arrow, the coating liquid is applied to the surface to form a coating layer (see FIG. 15 described above).

  At this time, a roughening zone 80B to which the shape of the embossing molds 42K, 42K,... Is transferred is formed downstream of the butt joint portion. There is no problem that the layer is disturbed, and an extremely thin or uncoated part immediately after the bonding tape 47, no local thick-coated part immediately after the bonding tape 47, and there are bubbles in the coating layer. There are no defects including.

  That is, when the rear edge of the bonding tape 47 passes through the coating zone, the air layer captured in the triangular space between the surface of the new web 80 and the coating liquid layer and the slip of the coating liquid layer thereon Is presumed to be blocked by the uneven shape of the roughening zone 80B of the subsequent new web 80.

  Thus, according to the web butt-joining device 10 of the present invention, in the conventional butt-joining, before the web butt-joining, the web wound in advance in a roll shape is rewound, It is necessary to perform a surface roughening treatment and to rewind the web again, which solves the problem that the operation is very complicated.

  As mentioned above, although the example of embodiment of the butt | joint joining apparatus and method of the web which concerns on this invention was demonstrated, this invention is not limited to the example of the said embodiment, Various aspects can be taken.

  For example, in the example of the present embodiment, the embossing molds 42K, 42K,... Are formed on the cutting drum 42. Alternatively, the embossing molds 42K, 42K,. The effect can be obtained as in the embodiment. In this case, the emboss dies 42K, 42K,... Are transferred by the cutting drum 42 and the cutting / joining drum 44, or by the cutting / joining drum 44 and the joining drum 46.

  Similarly, embossing dies 42K, 42K,... Can be formed on the joining drum 46, and the same effects as in the present embodiment can be obtained. In this case, the emboss dies 42K, 42K,... Are transferred by the cutting and joining drum 44 and the joining drum 46.

  Further, in the example of the present embodiment, a three-drum configuration of the cutting drum 42, the cutting and joining drum 44, and the joining drum 46 is adopted, but the cutting drum 42, the cutting and joining drum 44, the joining drum 46, and the nip drum are included. A 4-drum configuration can be employed. In this case, the cutting and joining drum 44 is not used for the butt joining of the webs, but the joining drum 46 and the nip drum arranged to face the joining drum 46 are used. Then, the emboss dies 42K, 42K,...

  Furthermore, in the present embodiment, the roughened zone 80B of the new web 80 is formed adjacent to the bonding tape 47, but the roughened zone 80B can also be provided at a position away from the bonding tape 47. FIG. 14 is an enlarged view of a main part of the web in a joined state for explaining this state, and corresponds to FIG. 13A described above.

  The distance l between the rear edge of the bonding tape 47 and the tip of the roughening zone 80B is preferably 0 to 10 mm, and more preferably 0 to 5 mm. The width m of the roughening zone 80B is sufficient if it is about 20 mm.

  However, since the optimum values of l and m vary depending on the type of coating solution, the surface physical properties of the web, the thickness of the bonding tape 47, the coating speed, and the coating amount, it is preferable to confirm by a test run.

  Further, the configuration of the web butt-joining apparatus is not limited to the example of the present embodiment. For example, the apparatus disclosed in Japanese Patent Publication No. 6-57579, or the apparatus disclosed in Japanese Patent No. 358456. Can also be configured.

Configuration diagram of web butt joining apparatus of the present invention Main part configuration diagram of joining unit Structural diagram of the removal unit that removes the cutting residue of the old roll Main part configuration diagram of cutting drum of joining unit Plan view showing web butt condition Top view showing embossing mold State diagram showing the state just before joining Explanatory drawing explaining drawer of new roll tip Graph explaining the withdrawal of the new roll tip Enlarged view of the main part explaining the cutting of the web Enlarged view of the main part explaining web joining The principal part block diagram of the cutting drum of the joining unit of 2nd Embodiment. The principal part enlarged view explaining the joining state of the web in embodiment The principal part enlarged view explaining the other example of the joining state of the web in embodiment The principal part enlarged view explaining the joining state of a web in a prior art example

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Web butt joining apparatus, 18 ... Turret arm, 26 ... Old web, 28 ... Old roll, 30 ... New roll, 36 ... Joining unit, 42 ... Cutting drum, 42B ... Cutter, 42C ... Adsorption board, 42K ... Embossing type, 44 ... Cutting and joining drum, 44B ... Contact plate, 44C ... Suction plate, 46 ... Judging drum, 46B ... Suction plate, 80 ... New web, 80B ... Roughening zone

Claims (7)

A turret means that supports the old roll and the new roll wound with the belt-like flexible support so as to be rewound, and is rotatable at a predetermined angle;
A cutting member having a length substantially the same as the width of the band-shaped flexible support provided on the cylindrical portion of the peripheral surface with its tip protruding, and substantially the same as the width of the band-shaped flexible support adjacent to the cutting member An embossed zone formed of a set of a plurality of protrusions provided in an area having a predetermined width and a holding means for holding a leading end portion of the belt-like flexible support of the new roll, the belt-like flexible support A cutting drum capable of rotating at the same speed as the conveying speed of the belt-like flexible support during the joining,
A cutting receiving member having substantially the same length as the width of the belt-like flexible support, and holding means for holding the vicinity of the end portion of the belt-like flexible support of the old roll, A cutting and joining drum capable of rotating at the same speed as the transport speed of the belt-like flexible support during joining;
A bonding drum that holds the bonding tape in a peelable manner and can rotate at the same speed as the conveying speed of the band-shaped flexible support when the band-shaped flexible support is bonded;
Cutting and butt-joining the end of the strip-shaped flexible support body of the old roll and the tip of the strip-shaped flexible support body of the new roll while conveying the strip-shaped flexible support body, A web butt-joining apparatus, wherein an embossed shape is formed on a surface of a flexible support. A turret means that supports the old roll and the new roll wound with the belt-like flexible support so as to be rewound, and is rotatable at a predetermined angle;
A cutting member having a length substantially the same as the width of the belt-like flexible support provided on the cylindrical portion of the peripheral surface so as to protrude, and a holding for holding the tip of the belt-like flexible support of the new roll And a cutting drum that can be rotated at the same speed as the conveying speed of the belt-like flexible support when the belt-like flexible support is joined,
A plurality of cut receiving members having substantially the same length as the width of the belt-like flexible support, and a plurality of cut receiving members provided in an area having a predetermined width and substantially the same length as the width of the belt-like flexible support adjacent to the cut and receiving member. An embossed zone made up of a set of protrusions and holding means for holding the vicinity of the end of the band-shaped flexible support of the old roll, and the band-shaped flexible support A cutting and joining drum that can rotate at the same speed as the conveying speed;
A bonding drum that holds the bonding tape in a peelable manner and can rotate at the same speed as the conveying speed of the band-shaped flexible support when the band-shaped flexible support is bonded;
Cutting and butt-joining the end of the strip-shaped flexible support body of the old roll and the tip of the strip-shaped flexible support body of the new roll while conveying the strip-shaped flexible support body, A web butt-joining apparatus, wherein an embossed shape is formed on a surface of a flexible support. A turret means that supports the old roll and the new roll wound with the belt-like flexible support so as to be rewound, and is rotatable at a predetermined angle;
A cutting member having a length substantially the same as the width of the belt-like flexible support provided on the cylindrical portion of the peripheral surface so as to protrude, and a holding for holding the tip of the belt-like flexible support of the new roll And a cutting drum that can be rotated at the same speed as the conveying speed of the belt-like flexible support when the belt-like flexible support is joined,
A cutting receiving member having substantially the same length as the width of the belt-like flexible support, and holding means for holding the vicinity of the end portion of the belt-like flexible support of the old roll, A cutting and joining drum capable of rotating at the same speed as the transport speed of the belt-like flexible support during joining;
Embossing comprising a set of a plurality of protrusions provided in an area having a predetermined width and substantially the same length as the width of the belt-like flexible support adjacent to the holding portion of the bonding tape while holding the bonding tape in a peelable manner A joining drum comprising a zone and capable of rotating at the same speed as a transport speed of the belt-like flexible support when joining the belt-like flexible support;
Cutting and butt-joining the end of the strip-shaped flexible support body of the old roll and the tip of the strip-shaped flexible support body of the new roll while conveying the strip-shaped flexible support body, A web butt-joining apparatus, wherein an embossed shape is formed on a surface of a flexible support.   The emboss zone is provided on the downstream side in the rotation direction of the cutting member, the cutting receiving member, or the holding portion of the bonding tape, and an embossed shape is formed on the downstream side of the butt joint portion of the strip-shaped flexible support. The web butt-joining apparatus according to claim 1, wherein the web butt-joining apparatus is provided.   The web butt-joining apparatus according to any one of claims 1 to 4, wherein the protrusion of the emboss zone is a square pyramid having a base length of 0.5 to 2 mm.   The web butt-joining device according to any one of claims 1 to 5, wherein the protrusion of the emboss zone is a quadrangular pyramid having a top side length of 0.2 to 0.5 mm. While running the belt-like flexible support wound around the old roll, cutting between the end of the belt-like flexible support of the old roll and the tip of the belt-like flexible support wound around the new roll; In the butt-joining method of the web for butt-joining,
Winding the strip-like flexible support of the new roll around the cutting drum, and holding the tip of the strip-like flexible support of the new roll by the new web holding means of the cutting drum;
Winding the strip-like flexible support of the old roll around the cutting and joining drum, and holding the vicinity of the end of the strip-like flexible support of the old roll by the old web holding means of the cutting and joining drum; ,
Holding the bonding tape on the bonding drum;
While the cutting and joining drum is rotated at the same speed as the conveying speed of the belt-like flexible support, and the cutting drum is rotated at the same speed as the conveying speed of the belt-like flexible support, the cutting drum or A state in which the belt-like flexible support of the old roll and the belt-like flexible support of the new roll are overlapped by a cutting member provided with a tip projecting from a cylindrical portion of the peripheral surface of the cutting and joining drum Cutting with
Abandoning the vicinity of the end of the cut strip-shaped flexible support of the old roll and the tip of the strip-shaped flexible support of the new roll, the strip-shaped flexible support of the old roll and the new roll Holding the roll-like flexible support of the roll on the peripheral surface of the cutting drum or the cutting and joining drum;
Bonding the bonding tape held on the bonding drum to the band-shaped flexible support of the old roll and the band-shaped flexible support of the new roll held on the peripheral surface of the cutting drum or the cutting and bonding drum And steps to
A plurality of protrusions provided in an area having a predetermined width and substantially the same length as the width of the strip-like flexible support adjacent to the downstream side in the rotational direction of the holding portion of the cutting member, the cutting receiving member, or the bonding tape. Forming an embossed shape on the downstream side of the butt joint of the belt-like flexible support by an embossed zone consisting of
A web butt-joining method comprising:

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