JP2012040242A - Web roll and perforation processing device of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a web roll capable of restraining the peeling of paper without giving embossing to the web.SOLUTION: A toilet roll 10 is provided, where a web 11 obtained by laminating belt-shaped tissues 11a and 11b, is wound in a roll shape. In this toilet roll 10, perforations for breakage 13 which extends between both side edges in the width direction of the web 11 and extend for cutting and separating the web 11 along the width direction are formed along the longitudinal direction of the web 11 at every predetermined interval. The toilet roll 10 is provided with perforations for bonding 14a, 14b, and 14c which are formed in the web 11 in such a manner that they are positioned between the perforations for breakage 13 adjacent to each other along the longitudinal direction of the web 11 for bonding the laminated belt-shaped tissues 11a and 11b integrally with each other. These perforations for bonding 14a, 14b and 14c are arranged being away from both side edges in the width direction of the web 11.

Description

  The present invention relates to a web roll in which webs formed by laminating band-shaped papers are wound in a roll shape, and a perforation processing apparatus for forming perforations in the web roll.

  In a web roll in which a web is wound in a roll shape such as a toilet roll or a kitchen roll, a certain degree of flexibility may be required for the web itself. In order to satisfy such requirements, a web formed by laminating two or more belt-like papers is employed. In this case, Patent Document 1 and Patent Document 2 propose a technique for performing mechanical embossing on a web so that papers in a laminated state are not peeled from each other.

JP 2002-227099 A JP 2009-240722 A

  When embossing the laminated paper so that they do not peel off each other, if the embossing position is always continuous at a constant position in the web width direction, the outer peripheral surface of the wound web roll A part of bulges in an annular shape by embossing stacking. As a result, there is a problem that the appearance of the web roll is impaired.

  For this reason, Patent Document 1 and Patent Document 2 propose that the embossing is performed discontinuously along the longitudinal direction of the web, or the position and size of the embossing are shifted with respect to the width direction of the web. ing.

  In any case, in the conventional web roll production facility for laminating a plurality of sheets of paper, it is necessary to incorporate an embossing device for embossing the web, which increases the equipment cost and installation space for it. Must be secured.

  By the way, in the web roll in which flexibility is required for the web itself, breaking perforations for facilitating the separation are formed at regular intervals along the longitudinal direction of the web. Since this breaking perforation also has the function of making it difficult for the paper to peel off, the previous embossing device can be omitted by using the perforation processing device for forming the breaking perforation. May be possible.

  The present invention has been made in view of such knowledge, and its purpose is to provide a web roll in which webs formed by laminating band-shaped papers are wound in a roll shape without performing embossing as in the past. It is providing the web roll which can suppress peeling of paper. It is also included in the object of the present invention to provide a perforation processing apparatus for forming perforations on the web roll.

  A first aspect of the present invention is a web roll in which a web formed by laminating strip-shaped paper is wound in a roll shape, extending across both side edges in the width direction of the web, In the web roll in which breaking perforations for separating the web along its width direction are formed at predetermined intervals along the longitudinal direction of the web, the breaking perforations adjacent to each other along the longitudinal direction of the web A perforation formed on the web so as to be positioned between the paper in a laminated state so as to be integrally joined to each other. It is characterized by being arranged away from the edge.

  In the present invention, the web can be separated from the breaking perforation by applying a shearing force to the web drawn from the web roll at the desired breaking perforation. The joining perforations are joined together to maintain the paper stack and prevent the individual papers from separating from each other.

  In the web roll according to the first embodiment of the present invention, the joining perforations are arranged in a straight line along the width direction of the web, and the total width dimension of the joining perforations arranged in the straight line is the width dimension of the web. Is preferably in the range of 10 to 20%.

  A plurality of rows of joining perforations arranged in a straight line can be formed between the breaking perforations adjacent in the longitudinal direction of the web.

  A second embodiment of the present invention is a rotary blade holder that rotates by driving, and a comb-like cutter having a discontinuous cutting edge along a direction parallel to the rotation axis of the rotary blade holder is attached. And a fixed blade holder that is held in a fixed state so as to face the rotary blade holder, and the cutting edge is a straight line that continues in a straight line along a direction parallel to the rotation axis of the rotary blade holder. A fixed blade holder to which a blade-like cutter is attached, and a web formed by laminating strip-shaped paper is passed between the comb-like cutter of the rotary blade holder and the linear cutter of the fixed blade holder, thereby In the perforation processing apparatus for forming a perforation corresponding to the cutting edge of the comb-shaped cutter along the width direction of the web across both edges in the width direction of the web, the rotary blade holder A cutting edge that forms a straight line along a direction parallel to the rotation axis is discontinuous, and a joining cutter that does not form perforations on both side edges in the width direction of the web is attached to the rotary blade holder. The total perforation length of the cutter is set shorter than the total length of the top edges of the comb-shaped cutter.

  According to the present invention, the web passes so as to cross the cutting edge of the linear cutter attached to the fixed blade holder, and the comb-like cutter and the joining cutter of the rotary blade holder are rotated at a peripheral speed corresponding to the passing speed of the web. Rotate. A perforation is formed in the web when the comb-like cutter passes through the linear cutter, and a perforation is also formed in the web when the joining cutter passes through the linear cutter. The perforation formed by the comb-shaped cutter and the linear cutter extends across both side edges in the width direction of the web and is a break perforation for cutting the web along the width direction. Become. Further, the perforation formed by the joining cutter and the linear cutter is a joining perforation for integrally joining the papers in the laminated state to each other, and this joining perforation is the width direction of the web. It is formed away from both side edges.

  In the perforation device according to the second embodiment of the present invention, there are a plurality of joining cutters, and these joining cutters and comb-shaped cutters are equally spaced along the circumferential direction around the rotation axis of the rotary blade holder. It is preferable to arrange them. In this case, the cutting cutters adjacent to each other along the circumferential direction around the rotation axis of the rotary blade holder may have their blade edge positions displaced from each other along the rotation axis of the rotary blade holder.

  The comb-shaped cutter and the joining cutter include a plurality of cutter pieces each having one or more cutting edges, and the number of cutter pieces constituting the joining cutter is less than the number of cutter pieces constituting the comb-shaped cutter. It may be set.

  According to the web roll of the present invention, the joining perforations for integrally joining the papers in the laminated state are arranged away from both side edges in the width direction of the web, so the web separated from the breaking perforations. This part can be reliably joined. As a result, it is possible to prevent a problem that the papers are separated from each other.

  When the total width dimension of the joining perforations arranged in a straight line is in the range of 10 to 20% of the width dimension of the web, the joining perforation portion is maintained while maintaining the joining strength of the paper in the laminated state. It is possible to suppress problems that cause the web to break.

  When a plurality of rows of joining perforations arranged in a straight line are formed between the breaking perforations adjacent to each other in the longitudinal direction of the web, it is possible to more reliably join the portions of the web away from the breaking perforations. it can.

  According to the perforation processing device of the present invention, since the joining cutter is attached to the rotary blade holder to which the comb-like cutter is attached, the breaking perforation and the joining perforation can be formed on the web simply by adding the joining cutter. Can be formed.

  When there are a plurality of joining cutters, and these joining cutters and comb-shaped cutters are arranged at equal intervals along the circumferential direction around the rotation axis of the rotary blade holder, the breaking sewing machine is provided along the longitudinal direction of the web. The eye and the perforation for joining can be formed at equal intervals. As a result, the bonding strength of the paper can be made more uniform along the longitudinal direction of the web. In particular, when the cutting edge positions of adjacent cutting cutters along the circumferential direction around the rotation axis of the rotary blade holder are shifted from each other along the rotation axis of the rotary blade holder, the perforation for bonding is the width direction of the web It can be in a state of being dispersed along. As a result, it is possible to avoid such a problem that the joining rolls are overlapped at the same place and the appearance of the surface of the web roll is lowered.

  When the comb tooth cutter and the joining cutter include a plurality of cutter pieces each having one or more cutting edges, a single type of cutter piece can be used in combination with the comb tooth cutter and the joining cutter. Moreover, the length of the perforation for joining can be freely changed, and the joining strength can be easily changed.

It is a three-dimensional projection figure showing the external appearance of one Example which applied the web roll by this invention to the toilet roll. It is a conceptual diagram which represents typically the manufacturing system of the toilet roll shown in FIG. In the manufacturing system shown in FIG. 2, it is the front view which expanded the main part of the part of the perforation processing apparatus. FIG. 4 is a three-dimensional projection view showing the appearance of the fixed blade holder and the rotary blade holder of the perforation processing apparatus shown in FIG. 3 in an exploded state.

  An embodiment in which a web roll according to the present invention is applied to a toilet roll will be described in detail with reference to FIGS. However, the present invention is not limited to such an embodiment. For example, the present invention is applied to a web roll in which a web formed by laminating two or more strip-shaped papers, such as a kitchen roll, is wound into a roll. Can do.

  The external appearance of the toilet roll in this embodiment is shown in FIG. The toilet roll 10 in the present embodiment is obtained by winding a web 11 in which a plurality of (two in the present embodiment) tissues 11a and 11b are stacked as a paper of the present invention around a cylindrical core 12 for a predetermined length. The web 11 is formed with breaking perforations 13 and joining perforations 14a, 14b, 14c. The breaking perforation 13 is for cutting the web 11 along the width direction, and has a function of integrally joining the tissues 11a and 11b in a laminated state. The breaking perforations 13 extending across both edges in the width direction of the web 11 are formed at predetermined intervals along the longitudinal direction of the web 11. The joining perforations 14a to 14c are for integrally joining the tissues 11a and 11b in a laminated state so as to be positioned between the breaking perforations 13 adjacent along the longitudinal direction of the web 11. The web 11 is arranged away from both side edges of the web 11 in the width direction. In the present embodiment, three rows of joining perforations 14a to 14c are formed at equal intervals between two breaking perforations 13 adjacent along the longitudinal direction of the web 11, and each joining perforation 14a. -14c is arranged in a straight line along the width direction of the web 11, respectively. It should be noted that the joining perforations 14 a to 14 c are not for breaking the web 11, and therefore there is no need to penetrate the web 11 unlike the breaking perforation 13. It should also be noted that these joining perforations 14a-14c need not be formed at equal intervals along the longitudinal direction of the web 11.

  Hereinafter, for convenience, the side closer to the core 12 is referred to as the base end of the web 11, and the side far from the core 12 is referred to as the end of the web 11. Further, the first perforations for joining are sequentially arranged from the proximal end side to the distal end side of the web 11 by connecting the joining perforations 14a to 14c located between the two breaking perforations 13 adjacent along the longitudinal direction of the web 11. These are referred to as eye 14a, second joining perforation 14b, and third joining perforation 14c. The total width dimension of the first to third joining perforations 14a to 14c arranged in a straight line, that is, the total length along the width direction of the web 11 of the slit portion engraved in the web 11, It is set in the range of 10 to 20% of the width dimension of the web 11. When the sum of the width dimensions of the individual joint perforations 14a to 14c is less than 10% of the width dimension of the web 11, the functions of the joint perforations 14a to 14c become insufficient, and the tissues 11a and 11b in the laminated state are not attached. It becomes difficult to integrally bond with each other. On the other hand, when the total width dimension of the individual perforations 14a to 14c exceeds 20% of the width dimension of the web 11, the web perforations 14a to 14c are removed from the joint perforations 14a to 14c by the force of breaking the web 11. 11 is likely to break. The number of bonding perforations 14a to 14c arranged between two breaking perforations 13 adjacent along the longitudinal direction of the web 11 is not limited to three rows, but may be one row, two rows, or four rows or more. It is possible to increase the bonding strength of paper in a laminated state as the number of rows increases. When a plurality of joining perforations are formed, it is preferable that the formation positions of the joining perforations in each row are shifted from each other along the width direction of the web 11.

  A manufacturing facility for such a toilet roll 10 is schematically shown in FIG. The raw tissue stand 15 is provided with a first long tissue 11A and a second long tissue 11B. These long tissues 11A and 11B are several times to a dozen times the width of the toilet roll 10 as a product. It has double width. An embossing section 16 is disposed adjacent to the raw tissue stand 15, and a winding section 17, a terminal processing section (not shown), and a cutting section are disposed in this order. The long tissue 11A, 11B having a strip shape drawn out from the first raw fabric tissue 11A and the second raw fabric tissue 11B is subjected to predetermined embossing at the embossing portion 16. Thereby, tension and flexibility are given to the long tissues 11A and 11B, and the long tissues 11A and 11B are overlapped with each other at the embossed portion 16 to form a laminated state. A perforation device 18 is disposed in a winding portion 17 where a long winding core 12 (see FIG. 1) (not shown) is disposed. This perforation processing device 18 has a perforation 13 for breaking (see FIG. 1) and perforations 14a to 14c for joining (see FIG. 1) on a long web 11L formed by superimposing long tissues 11A and 11B. It is for forming. A long web 11L having a predetermined length on which the perforation line 13 for breaking and the perforation lines 14a to 14c are formed is wound around the long core 12 by the perforation processing device 18. In the end treatment unit, the end of the long web 11L having a predetermined length is glued to the surface of the long toilet roll 10 (see FIG. 1) wound around the long core 12 and cut to the cut portion. It is carried out. The base end of the long web 11L remaining after the cutting is wound around a new long core 12 disposed in the winding unit 17, and the long web 11L having a predetermined length is again wound around the long core 12. It is designed to be wound up. In the cutting part, the long toilet roll 10 is cut into a predetermined width by a cutter (not shown) to form individual toilet rolls 10.

  FIG. 3 shows a schematic structure of the perforation processing apparatus 18 in the present embodiment for forming the perforations 13, 14a to 14c on the toilet roll 10 shown in FIG. 1, and FIG. The perforation processing device 18 in the present embodiment includes a rotary blade holder 19 that is driven to rotate and a fixed blade holder 20 that is held in a fixed state facing the rotary blade holder 19. The basic configuration of the perforation processing device 18 is described in detail in Japanese Utility Model Laid-Open No. 6-27097.

  The rotary blade holder 19 that is driven and rotated in synchronization with the conveying speed of the long web 11L by a driving device (not shown) has an elongated cylindrical shape. A plurality of (four in the illustrated example) cutout portions 21 extending along the width direction are formed on the outer peripheral surface of the rotary blade holder 19 at equal intervals in the circumferential direction of the rotary blade holder 19. Functions as a mounting part. That is, a comb-like cutter 22 is fixed to the first notch portion 21 via a bolt 23, and the remaining notch portion 21 is joined to a joining cutter (hereinafter referred to as first to third joining cutters for convenience). 24a, 24b, and 24c are similarly fixed via bolts 23. In the comb-like cutter 22 and the joining cutters 24a to 24c, the cutting edges 22T and 24T that form a straight line along the direction parallel to the rotation axis C of the rotary blade holder 19 are discontinuous. Thereby, the comb-shaped cutter 22 and the joining cutters 24a to 24c are in a state of being arranged at equal intervals along the circumferential direction around the rotation axis C of the rotary blade holder 19. The distance from the rotation axis C of the rotary blade holder 19 to the cutting edge 22T of the comb-shaped cutter 22 and the distance to the cutting edge 24T of the joining cutters 24a to 24c are set substantially equal. Further, the rotational speed of the rotary blade holder 19 is controlled so that the peripheral speeds of the blade edges 22T and 24T coincide with the conveying speed of the long web 11L. It should be noted that the distance from the rotation axis C of the rotary blade holder 19 to the cutting edge 22T of the comb-shaped cutter 22 is only a slight distance from the rotation axis C of the rotary blade holder 19 to the cutting edge 24T of the joining cutters 24a to 24c. A short setting is also effective. Thereby, when a shearing force is applied to the web 11, it is possible to further suppress the breakage of the web 11 caused by the joining perforations 14 a to 14 c.

  In the present embodiment, the comb-shaped cutter 22 includes a plurality of cutter pieces 25 (15 in the illustrated example per one toilet roll 10) having one or more (four in the illustrated example) cutting edges 22T. Are continuously arranged on the same plane along the rotation axis C.

  Further, the first to third joining cutters 24 a to 24 c in the present embodiment use the same cutter pieces 25 as the individual cutter pieces 25 constituting the comb-shaped cutter 22. More specifically, the first and third joining cutters 24 a and 24 c adjacent to the comb-shaped cutter 22 in the circumferential direction are each provided with two cutter pieces 25 per one toilet roll 10 of the rotary blade holder 19. They are arranged at intervals in a direction parallel to the rotation axis C. Further, the second joining cutter 24b located on the opposite side to the comb-shaped cutter 22 by 180 degrees has three cutter pieces 25 per one toilet roll 10 parallel to the rotational axis C of the rotary blade holder 19. It is arranged at intervals in the direction. In this case, the positions of the blade tips 24T of the first and third joining cutters 24a and 24c and the second joining cutter 24b along the rotational axis C of the rotary blade holder 19 are shifted from each other. Thereby, in the state of the toilet roll 10, the perforation 14a-14c formed in the web 11 does not overlap in the circumferential direction, and the malfunction that the appearance of the toilet roll 10 falls does not occur.

  As described above, the number of cutter pieces 25 constituting the joining cutters 24 a to 24 c is set to be smaller than the number of cutter pieces 25 constituting the comb-shaped cutter 22. Thereby, the sum total of the length of the blade edge | tip 24T of the cutter 24a-24c per one toilet roll 10 is set shorter than the total length of the blade edge | tip 22T of the comb-shaped cutter 22, respectively. In this case, the total length of the cutting edges 24T of the joining cutters 24a to 24c along the rotation axis C of the rotary blade holder 19 per toilet roll 10 is from 10 of the width dimension of the single toilet roll 10. It is preferable to set in the range of 20%. Further, by composing the comb-like cutter 22 and the joining cutters 24a to 24c with a single cutter piece 25, the constructions of the joining cutters 24a to 24c are compared according to the demand for joining strength with respect to the tissues 11a and 11b. It can be changed easily.

  The fixed blade holder 20 is attached with a linear cutter 26 in which the cutting edge 26T is continuous in a straight line along a direction parallel to the rotation axis C of the rotary blade holder 19. The web 11 passes between the linear cutter 26 of the fixed blade holder 19 and the comb-shaped cutter 22 and the joining cutters 24 a to 24 c of the rotary blade holder 19. In this case, the fixed blade holder 20 sandwiches the web 11 being conveyed by the cutting edges 22T and 24T of the comb-shaped cutter 22 and the first to third joining cutters 24a to 24c attached to the rotary blade holder 19 that is driven and rotated. Thus, the linear cutter 26 is fixed at a position where it comes into contact with the cutting edge 26T intermittently. Accordingly, perforations 13 and 14a to 14c corresponding to the cutting edges 22T and 24T of the comb-shaped cutter 22 and the first to third joining cutters 24a to 24c are intermittently formed along the longitudinal direction of the web 11. It will be.

  In the above-described embodiment, the comb-like cutter 22 and the joining cutters 24a to 24c are configured by the combination of the cutter pieces 25. However, the dedicated comb-like cutter 22 and the joining cutters 24a to 24c are used. Of course it is also possible. Further, in this embodiment, although the joining cutters 24 a to 24 c are arranged in three rows along the circumferential direction of the rotary blade holder 19, it is possible to further increase or decrease the number as necessary. In general, it is natural that the bonding strength of the tissues 11a and 11b per unit area tends to increase as the number of the perforations for bonding 14a to 14c increases. Furthermore, it is also effective to arrange the joining cutters 24 a to 24 c in a multi-threaded manner with respect to the rotary blade holder 19 in order to distribute the joining perforations 14 a to 14 c uniformly by the web 11.

  As described above, the present invention should be construed only from the matters described in the scope of the claims, and in the above-described embodiments, the matters described in all the changes and modifications included in the concept of the present invention are described. Other than possible. That is, all matters in the above-described embodiment are not intended to limit the present invention, and include any configuration not directly related to the present invention. To get.

DESCRIPTION OF SYMBOLS 10 Toilet roll 11 Web 11a, 11b Tissue 11A, 11B Long tissue 11L Long web 12 Winding core 13 Break perforation 14a, 14b, 14c Join perforation 15 Original fabric tissue stand 16 Embossing part 17 Winding part 18 Perforation processing device 19 Rotating blade holder 20 Fixed blade holder 21 Notch portion 22 Comb-shaped cutter 22T Cutting edge 23 Bolt 24a, 24b, 24c Joining cutter 24T Cutting edge 25 Cutter piece 26 Linear cutter 26T Cutting edge C Rotating axis

Claims (7)

A web roll in which a web formed by laminating belt-shaped paper is wound in a roll shape, extends across both side edges in the width direction of the web, and cuts the web along the width direction In the web roll in which the perforation for breaking is formed at predetermined intervals along the longitudinal direction of the web,
A joining perforation formed on the web so as to be positioned between the breaking perforations adjacent along the longitudinal direction of the web and integrally joining the paper in a laminated state. The web roll is characterized in that the perforation for bonding is arranged away from both side edges in the width direction of the web.   The joining perforations are arranged in a straight line along the width direction of the web, and the total width dimension of the joining perforations arranged in a straight line is 10 to 20% of the width dimension of the web. The web roll according to claim 1, wherein the web roll is in a range.   3. The joining perforations arranged in a straight line are formed in a plurality of rows between the breaking perforations adjacent along the longitudinal direction of the web. Web roll. A rotary blade holder that is driven and rotated, and a rotary blade holder to which a comb-like cutter having a discontinuous cutting edge formed in a straight line along a direction parallel to the rotation axis of the rotary blade holder is attached;
A fixed blade holder that is held in a fixed state facing the rotary blade holder, and is fixed with a linear cutter that has a blade tip that is continuous in a straight line along a direction parallel to the rotation axis of the rotary blade holder. And a web formed by laminating strip-shaped paper is passed between the comb-like cutter of the rotary blade holder and the linear cutter of the fixed blade holder, thereby along the width direction of the web. In the perforation processing apparatus for forming the perforation corresponding to the blade edge of the comb-shaped cutter across both edges in the width direction of the web,
A cutting edge that forms a straight line along a direction parallel to the rotation axis of the rotary blade holder is discontinuous, and a joining cutter that does not form perforations on both side edges in the width direction of the web is attached to the rotary blade holder, The perforation device characterized in that the total length of the cutting edges of the joining cutter is set to be shorter than the total length of the cutting edges of the comb-shaped cutter.   A plurality of the joining cutters are provided, and the joining cutters and the comb-shaped cutters are arranged at equal intervals along a circumferential direction centering on a rotation axis of the rotary blade holder. Item 5. A perforation processing apparatus according to Item 4.   The cutting blades adjacent to each other along the circumferential direction around the rotation axis of the rotary blade holder have their blade edge positions displaced from each other along the rotation axis of the rotary blade holder. Item 6. A perforation processing apparatus according to Item 5.   The comb-shaped cutter and the joining cutter include a plurality of cutter pieces each having one or more cutting edges, and the number of the cutter pieces constituting the joining cutter constitutes the comb-shaped cutter. The perforation device according to any one of claims 4 to 6, wherein the number is set to be smaller than the number of cutter pieces.

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