JP5761082B2 - Embossing device - Google Patents

Description

  The present invention relates to an embossing apparatus for embossing sanitary paper or the like.

  In a roll-like sanitary paper in which a sanitary paper such as a toilet roll or kitchen roll is wound in a roll shape, the paper itself is often required to have a certain degree of flexibility and touch. In order to satisfy such requirements, it is widely performed to emboss a sheet or to stack a plurality of thinner flexible sheets. In particular, embossing is considered as an extremely effective means because it can break fibers contained in paper and facilitates discrimination from other products by the embossing design.

  As an embossing device for embossing sanitary paper, those disclosed in Patent Literature 1 and Patent Literature 2 are known. The embossing apparatus disclosed in Patent Document 1 feeds sanitary paper between a pair of metal embossing rolls to emboss the sanitary paper. Moreover, the embossing apparatus disclosed in Patent Document 2 embosses sanitary paper by feeding sanitary paper between a metal embossing roll and a rubber roll pressed against the embossing roll. In any embossing device, when using an embossing roll with a different embossing pattern, it is necessary to remove the embossing roll attached to the device stand from the device stand and incorporate a new embossing roll into the device stand instead. there were.

JP 2007-168143 A JP 2007-175114 A

  When exchanging the embossing roll in the conventional embossing apparatus disclosed in Patent Document 1 or Patent Document 2, the embossing roll that has become unnecessary by removing the apparatus stand is removed from the apparatus stand, and a new new embossing roll is replaced with the apparatus stand. Need to be incorporated into For this reason, it is necessary to operate the embossing roll using an on-site crane, etc., and it takes time to replace it, and it is also necessary to make fine adjustments such as accurate positioning after installing a new embossing roll in the equipment stand. was there. As a result, it takes time and labor to change the embossing roll, and there is a possibility that not only the embossing apparatus but also the operation rate of the entire equipment is lowered.

  An object of the present invention is to provide an embossing apparatus capable of greatly omitting the time and labor required for setting up a conventional embossing roll.

  An embossing device according to the present invention is supported by a plurality of embossing rolls that are rotatably supported around rotation axes parallel to each other, and have irregularities formed on the surface, and around the axes parallel to the rotation axes of the plurality of embossing rolls. A backup roll that is supported so as to rotate freely and is movable so as to press against only one surface of the plurality of embossing rolls, and the backup roll is placed only on the surface of the one embossing roll. It is characterized by comprising roll position switching means for switching the position of the backup roll so as to be pressed.

  In the present invention, first, an embossing roll to be used is selected, and a belt-like web to be embossed is inserted between the backup roll and the selected embossing roll. Thereafter, the backup roll is pressed against the selected embossing roll by the roll position switching means, the web is sandwiched between them, and the embossing roll is driven and rotated in synchronization with the conveyance of the web, thereby performing a desired embossing on the web. Apply.

  In the embossing apparatus according to the present invention, it is preferable that the surface of the embossing roll is made of metal, and the surface of the backup roll is made of a rubber-like elastic body that can be elastically deformed.

  The plurality of embossing rolls includes a first embossing roll positioned above the backup roll, and a second embossing roll positioned below the backup roll, and the roll position switching means rotatably supports the backup roll. A roll holder, a pivot that pivotally connects the base end of the roll holder around an axis parallel to the rotation axis of the backup roll, and a backup roll that is connected to the tip of the roll holder and is centered on the pivot. And a fluid pressure cylinder for moving in the vertical direction.

  Roll driving means for driving and rotating the embossing roll can be further provided. In this case, the roll driving means preferably drives and rotates only the embossing roll against which the backup roll is pressed.

  According to the embossing apparatus of the present invention, it is possible to perform embossing with a desired embossing pattern simply by switching the position of the backup roll so as to press against the desired embossing roll. For this reason, it is not necessary to replace the embossing roll as in the prior art, the setup change is greatly simplified, and the operation efficiency of the embossing apparatus can be greatly increased.

  When the surface of the embossing roll is formed of metal and the surface of the backup roll is formed of a rubber-like elastic body that can be elastically deformed, the backup roll can be rotated only by driving and rotating the embossing roll. As a result, there is no need to rotate the backup roll synchronously with the embossing roll, and the power transmission mechanism can be simplified.

  When the first and second embossing rolls are arranged above and below the backup roll, and the backup roll is moved up and down by the fluid pressure cylinder, this is performed without increasing the floor area required for installing the second embossing roller. It can be incorporated in a space-saving manner.

  In the case where a roll driving means for driving and rotating the embossing roll is further provided and only the embossing roll pressed against the backup roll is driven and rotated, it is not necessary to rotate the backup roll synchronously with the embossing roll. For this reason, the power transmission mechanism for the backup roll can be omitted.

It is a three-dimensional projection figure showing the external appearance of an example of the toilet roll used as the object of this invention. It is a three-dimensional projection figure showing the external appearance of another example of the toilet roll used as the object of this invention. It is a conceptual diagram which represents typically a part of manufacturing line in one Embodiment which applied this invention to the toilet roll. It is a conceptual diagram which represents typically the side surface shape of the embossing part in the manufacturing line shown in FIG. It is a conceptual diagram which represents typically the case where another embossing roll is used in embodiment shown in FIG.

  An embodiment in which an embossing device according to the present invention is applied to embossing of a toilet roll will be described in detail with reference to FIGS. However, the present invention is not limited to such an embodiment, and can be applied to any belt-like sheet that needs to be embossed, such as sanitary paper such as a kitchen roll other than a toilet roll. .

  The external appearance of embodiment of two types of toilet roll used as the object of this invention is shown in FIG. 1 and FIG. Toilet rolls 10A and 10B in the present embodiment are obtained by winding a laminated continuous sheet 13 in which front surface tissues 11A and 11B and back surface tissue 12 are superposed on a cylindrical winding core 14 for a predetermined length. However, it is also possible to form a continuous sheet by superimposing one or more sheets, or to form a continuous sheet using only the surface tissues 11A and 11B.

  A large number of first embossed portions 11a and 11b protruding on the surface tissue 11A and 11B on the side of the overlapping surface with the back surface tissue 12 are formed in a repetitive pattern as shown in FIGS. Similarly, a large number of second embossed portions 12 c are formed on the back surface tissue 12 at predetermined intervals in an aligned state so as to protrude toward the surface that overlaps the front surface tissue 11. As described above, the first embossed portions 11a and 11b and the second embossed portion 12c are projected on the side of the overlapping surface of the front surface tissue 11 and the rear surface tissue 12, thereby allowing the surface texture of the front surface tissue 11 and the rear surface tissue 12 to be touched. Can keep good. As the patterns of the first embossed portions 11a, 11b and the second embossed portions 12c formed on the front surface tissue 11A, 11B and the back surface tissue 12, those having an arbitrary pattern other than those illustrated can be adopted as necessary. is there.

  Embossed portions 11 d and 12 d for joining extending along the longitudinal direction are formed on both side edges in the width direction of the laminated continuous sheet 13 so as not to protrude outward from both front and back surfaces of the laminated continuous sheet 13. These bonding embossed portions 11d, 12d define a bonding region for integrally bonding the front surface tissue 11A, 11B and the back surface tissue 12, and the surface tissue 11A, 11B from both side edges in the width direction of the laminated continuous sheet 13. And peeling of the backside tissue 12 can be suppressed.

  A manufacturing facility for such toilet rolls 10A and 10B is schematically shown in FIG. An original fabric surface tissue roll 11R and an original fabric reverse surface tissue roll 12R are arranged on the original fabric tissue stand 20, and these original fabric tissue rolls 11R and 12R are several times the width of the toilet rolls 10A and 10B as products. To have a width of more than 20 times. The long strips 11L and 12L formed in a strip shape drawn from the original fabric surface tissue roll 11R and the original fabric reverse surface tissue roll 12R are sent to an embossing section 21 disposed adjacent to the original fabric tissue stand 20. On the downstream side of the embossing part 21, a winding part 22 and a terminal processing part 23 are arranged in this order. The embossing part 21 embosses the raw fabric rolls 11R and 12R, respectively, and further embosses for bonding to integrate them. The winding unit 22 cuts the long laminated continuous sheet 13L fed from the embossing unit 21 into a long toilet roll 10L by cutting the continuous laminated sheet 13L every predetermined length and winding it around a long winding core. In the present embodiment, prior to the cutting of the long laminated continuous sheet 13L in the winding unit 22, the perforation for breaking across the width direction is formed at regular intervals along the longitudinal direction of the long laminated continuous sheet 13L. Like to do. The end processing unit 23 glues the end of the long toilet roll 10L discharged from the winding unit 22 to the surface thereof so that the long toilet roll 10L does not unwind. In addition, the long toilet roll 10L is carried out to the cutting part which is not shown in figure, is cut | disconnected by predetermined width, and becomes individual toilet roll 10A, 10B. The tip of the long laminated continuous sheet 13L remaining after cutting is wound around a new long core disposed in the winding unit 22, and the predetermined length of the laminated continuous sheet 13L is again applied to the long core. It is designed to be wound up.

  The embossed part 21 in this embodiment is extracted and enlarged and shown in FIGS. That is, on the frame 30 of the embossing portion 21, two embossing rolls 31A and 31B for front surface tissue, an embossing roll 32 for backside tissue, an embossing wheel 33 and a receiving roll 34 for performing embossing for joining, Are spaced apart. Concavities and convexities corresponding to the emboss pattern of the first embossed portion 11a shown in FIG. 1 are formed on the outer peripheral surface of the first embossing roll 31A for the surface tissue. Moreover, the unevenness | corrugation corresponding to the embossing pattern of the 1st embossing part 11b shown in FIG. 2 is formed in the outer peripheral surface of the 2nd embossing roll 31B for surface tissue. Similarly, irregularities corresponding to the emboss pattern of the second embossed portion 12 c shown in FIGS. 1 and 2 are formed on the outer peripheral surface of the backside tissue embossing roll 32. Moreover, the embossing pattern corresponding to the embossing portions 11d and 12d for joining shown in FIGS. 1 and 2 is formed on the outer peripheral surface of the embossing wheel 33 located on the lower side of the embossing wheel 33 and the receiving roll 34 facing vertically. Is formed.

  A backup roll 35 for the front surface tissue is movably disposed between the first and second embossing rolls 31A and 31B spaced apart from each other in the vertical direction, and the back surface is directly below the embossing roll 32 for the rear surface tissue. A backup roll 36 for tissue is arranged. The surface portions of the backup rolls 35 and 36 are formed of a hard rubber-like elastic body such as elastically deformable hard synthetic rubber, but at least the uneven portions of the embossing rolls 31A and 31B and the embossing wheel 33 are made of metal. Is formed. The backup rolls 35 and 36 are rotatably attached to roll holders 39 and 40 whose base end portions are swingably attached to the frame 30 around pivots 37 and 38, respectively. The end portions of the roll holders 39 and 40 are respectively pinned to the other end portions of the fluid pressure cylinders 41 and 42 whose one ends are pinned to the frame 30.

  The roll holder 39 to which the backup roll 35 for the surface tissue is attached, and the pivot 37 and the fluid pressure cylinder 41 that rotatably connect the frame holder 30 to the frame 30 function as roll position switching means of the present invention. That is, the position of the back-up roll 35 is vertically changed so that the back-up roll 35 is pressed against only one of the first and second embossing rolls 31A and 31B by the expansion and contraction of the piston rod 41a of the fluid pressure cylinder 41. You can switch to More specifically, when the piston rod 41a of the fluid pressure cylinder 41 is extended, the surface tissue backup roll 35 is pressed against only the first embossing roll 31A located on the lower side. As a result, it is possible to perform embossing with the first embossing roll 31A as shown in FIG. In this state, a sufficient gap is formed between the second embossing roll 31 </ b> B and the backup roll 35. On the contrary, when the piston rod 41a of the fluid pressure cylinder 41 is pulled back, the backup roll 35 presses against only the second embossing roll 31B located on the upper side, and embossing by the second embossing roll 31B as shown in FIG. Can be performed. In this state, a sufficient gap is formed between the first embossing roll 31 </ b> A and the backup roll 35. Thus, by extending and contracting the piston rod 41a of the fluid pressure cylinder 41, it is possible to instantaneously switch to the embossing state using either the first or second embossing roll 31A, 31B.

  A fluid pressure cylinder 42 connected to a roll holder 40 that supports the back-up tissue backup roll 36 is used to maintain a constant pressing pressure of the back-side tissue backup roll 36 against the back-side tissue embossing roll 32. is there.

  The embossing wheel 33 is rotatably attached to a distal end portion of a piston rod 43a of a fluid pressure cylinder 43 whose base end is pinned to the frame 30. The embossing wheel 33 is pressed with a predetermined pressing force by the fluid pressure cylinder 43 against the receiving roll 34 attached to the frame 30 so as to rotate synchronously with the embossing rolls 31A, 31B and the like. Note that the embossing wheel 33 may be rotatably attached to the frame 30 and may be driven to rotate synchronously with the embossing rolls 31A and 31B. In this case, the receiving roll 34 can be pressed against the outer peripheral surface of the embossing wheel 33 by the fluid pressure cylinder 43 in the same manner as the backup rolls 35 and 36 described above, and can be rotated by a frictional force.

  Above the embossing wheel 33 and the receiving roll 34, a tension adjusting roll 44 for removing the slack of the long laminated continuous sheet 13L drawn from the embossing section 21 to the winding section 22 is disposed. A base end portion of a slack eliminating arm 45 that rotatably supports the tension adjusting roll 44 is rotatably attached to the frame 30 via a pivot 46.

  The rotation axes of the rolls 31A to 36, 44 and the pivot shafts 37, 38, 46 described above are set in parallel to each other. The embossing rolls 31A, 31B, 32, and 34 are connected to unillustrated roll driving means for synchronously driving and rotating them, but the first and second embossing rolls 31A and 31B are only used. May be driven. The other embossing roll 33 and the remaining backup rolls 35 and 36 are driven to rotate by the frictional force accompanying the conveyance of the original fabric tissue rolls 11R and 12R.

  Therefore, the long tissue 11L, 12L in the form of a strip drawn from the original fabric surface tissue roll 11R and the original fabric reverse surface tissue roll 12R is embossed by the embossing portion 21, and the first and second embossed portions are respectively provided. 11a and 12c are formed. Thereby, tension and flexibility are given to the long tissues 11L and 12L. Next, the embossing portions 11d and 12d for joining are formed while passing between the embossing wheel 33 and the receiving roll 34, and the long tissues 11L and 12L are overlapped with each other and integrally joined in a laminated state.

  When the second embossing roll 31B is used, the insertion position of the long surface tissue 11L is switched from the state shown in FIG. 4 to the state shown in FIG. Next, by simply pulling up the piston rod 41a of the fluid pressure cylinder 41 and pressing the backup roll 35 against the second embossing roll 31B, the setup change can be performed very quickly.

  In the above-described embodiment, two different embossing rolls 31A and 31B are attached to the frame 30, but it is also possible to assemble three or more embossing rolls having different embossing patterns to the frame 30 with a distance therebetween. . In this case, it is necessary to be able to move the backup roll 35 relative to the frame 30 so that the backup roll 35 is pressed against only one arbitrary embossing roll. Needless to say, the structure of the present invention can be applied to the embossing roll 32 for the backside tissue as needed.

  It should be noted that the present invention should be construed only from the matters described in the claims, and in the above-described embodiment, all the changes and modifications included in the concept of the present invention are other than those described. Is 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.

10A, 10B Toilet roll 10L Long toilet roll 11A, 11B Surface tissue 11L Long surface tissue 11R Original fabric surface tissue roll 11a, 11b First embossed portion 11d Embossed portion for joining 12 Back surface tissue 12L Long back surface tissue 12R Original fabric back surface Tissue roll 12c 2nd embossed part 12d Bonding embossed part 13 Laminated continuous sheet 13L Long laminated continuous sheet 14 Roll core 20 Raw fabric tissue stand 21 Embossed part 22 Winding part 23 End treatment part 30 Frame 31A, 31B For surface tissue Embossing roll 32 Embossing roll for backside tissue 33 Embossing wheel 34 Receiving roll 35 Backup roll for surface tissue 36 Backup roll for backside tissue 37, 38 Axis 39,4 Roll holder 41-43 hydraulic cylinder 41a, 43a the piston rod 44 tensioning roll 45 slack eliminating arms 46 pivot

Claims (5)

A plurality of embossing rolls that are rotatably supported around rotation axes parallel to each other, each having irregularities formed on the surface, and
A backup roll that is rotatably supported around an axis parallel to the rotation axis of the plurality of embossing rolls and is movable so as to press against only one surface of the plurality of embossing rolls;
An embossing apparatus comprising roll position switching means for switching the position of the backup roll so that the backup roll is pressed against only the surface of the arbitrary one embossing roll.   The embossing apparatus according to claim 1, wherein the embossing roll has an uneven surface formed of metal, and the backup roll is formed of a rubber-like elastic body that is elastically deformable.   A plurality of embossing rolls includes a first embossing roll positioned above the backup roll and a second embossing roll positioned below the backup roll, and the roll position switching means rotates the backup roll. A roll holder that is freely supported, a pivot that pivotally connects a base end portion of the roll holder around an axis parallel to the rotation axis of the backup roll, and a pivot that is coupled to a distal end of the roll holder. The embossing apparatus according to claim 1 or 2, further comprising a fluid pressure cylinder for moving the roll holder in the vertical direction together with the backup roll as a center.   The embossing apparatus according to any one of claims 1 to 3, further comprising roll driving means for driving and rotating the embossing roll.   The embossing apparatus according to claim 4, wherein the roll driving unit drives and rotates only the embossing roll against which the backup roll is pressed.

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