JP2013202828A - Embossing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that handling for exchange and adjustment of a drive pulley or drive gear incorporated in an embossing apparatus in response to a change of a paper quality of sanitary paper is very complicated.SOLUTION: An embossing apparatus includes: emboss roll units 28, 29 for embossing long tissues 11L, 12L by rotating at a constant peripheral speed; web feeding means 21, 30, 31, 50 for delivering the long tissues 11L, 12L to the emboss roll units 28, 29; and means 44b, 45, 46, 47 which steplessly change feeding speeds of the long tissues 11L, 12L fed by the web feeding means 21, 30, 31, 50.

Description

  The present invention relates to an apparatus for continuously embossing a belt-shaped web such as a long sanitary paper.

  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, to stack a plurality of thinner flexible sheets, or to add a softening agent to the sheet. In particular, the embossing process can destroy fibers contained in the paper, and the embossing design makes it easy to distinguish from other products, so various embossing patterns have been proposed in Patent Document 1 and the like.

  As an embossing apparatus for embossing sanitary paper, the one disclosed in Patent Document 1 is known. The embossing apparatus disclosed in Patent Document 1 feeds sanitary paper between a metal embossing roll and a rubber roll pressed against the embossing roll to emboss the sanitary paper. In addition, although the embossing apparatus which uses a metal roll instead of this rubber roll is also known, in any embossing apparatus, the process of destroying a part of paper fiber at the time of emboss formation is included. And by destroying a part of this paper fiber, the sanitary paper is given flexibility and a good touch is obtained.

  When such an embossing device is used, it is necessary to always perform good embossing on the sanitary paper regardless of the change in the quality of the sanitary paper. For this reason, it is necessary to finely adjust the sanitary paper carry-in speed before embossing fed toward the embossing roll according to the paper quality of the sanitary paper with respect to the sanitary paper carry-out speed fed from the embossing roll. is there. Similarly, the distance between the embossing roll and the rubber roll or metal roll needs to be finely adjusted according to the quality of the sanitary paper.

JP 2011-212866 A JP 2007-136861 A

  However, in the conventional embossing apparatus, in order to cope with the change in the quality of the sanitary paper, it is necessary to replace the embossing roll unit or the upstream conveying roll unit, and the work is complicated. That is, in the conventional embossing device, the peripheral speed of the embossing roll is set faster than the peripheral speed of the transport roll juxtaposed upstream of the embossing roll, and the embossing is performed while applying a certain tension to the sanitary paper due to this speed difference. Is granted. In this case, keep the speed difference between the peripheral speed of the embossing roll and the peripheral speed of the upstream transport roll, and keep the paper quality of the sanitary paper soft by adding flexibility to the sanitary paper by adding a softener. To get a good touch. However, the tensile strength of the sanitary paper is reduced by such treatment, and as a result, there is a problem that the sanitary paper is partially torn or cut in the middle.

  Therefore, in order to adjust the peripheral speed difference between the embossing roll and the transporting roll in response to changes in the quality of sanitary paper, it is necessary to replace the driving pulley and driving gear that transmit the driving force to the embossing roll or the upstream transporting roll. It was extremely complicated.

  An object of the present invention is to provide an embossing apparatus that can easily cope with a change in the quality of sanitary paper.

  An embossing apparatus according to the present invention comprises an embossing roll unit for embossing a belt-like web by rotating at a constant peripheral speed, a web feeding means for feeding the web toward the embossing roll unit, and the web And a means for steplessly changing the web feeding speed by the feeding means.

  In the present invention, the web feeding speed is changed in a stepless manner in accordance with changes in the paper quality and the like so that optimum embossing is performed. As a result, the web feeding speed by the web feeding means with respect to the peripheral speed of the embossing roll unit is changed, and an optimum embossing state is adjusted.

  In the embossing apparatus according to the present invention, a drive pulley further comprising a drive source for driving the web feeding means, and means for steplessly changing the web feeding speed are connected to the web feeding means, and an embossing roll A variable pulley connected to one of the units and capable of arbitrarily changing the pitch diameter; an endless belt wound around the drive pulley and the variable pulley; and belt tension adjusting means for maintaining a constant tension of the endless belt; It may have. In this case, it is preferable to use a variable speed motor as a drive source.

  Further comprising a drive source for driving the embossing roll unit, a means for continuously changing the web feeding speed is connected to one side of the embossing roll unit, a driving pulley connected to one of the embossing roll units, and a pitch diameter connected to the web feeding means There may be provided a variable pulley that can arbitrarily change the drive pulley, an endless belt wound around the drive pulley and the variable pulley, and belt tension adjusting means for keeping the tension of the endless belt constant.

  According to the embossing device of the present invention, since it has means for changing the web feeding speed steplessly with respect to the peripheral speed of the embossing roll unit, even when the paper quality of the web changes, it is easy to perform the optimal embossing. It can be carried out.

  When a variable pulley capable of arbitrarily changing the pitch diameter is connected to one of the embossing roll units, the web feeding speed can be changed steplessly so that the peripheral speed of the embossing roll unit is constant.

  When the drive source for driving the web feeding means includes a variable speed motor, the web feeding speed can be easily changed steplessly.

  Similarly, when a variable pulley capable of arbitrarily changing the pitch diameter is connected to the embossing roll unit, the web feeding speed can be changed steplessly while maintaining the peripheral speed of the embossing roll unit constant.

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 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. FIG. 4 is a plan view obtained by extracting and enlarging a main part of the power transmission mechanism in the embossing part shown in FIG. 3. It is an enlarged view of the right side shape of the principal part in FIG. It is a conceptual diagram which represents typically the side surface shape of other one Embodiment of an embossing part. FIG. 7 is a plan view in which the main part of the power transmission mechanism is extracted and enlarged in the embossing part shown in FIG. 6.

  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 these embodiments, and can be applied to any strip-like sheet that needs to be embossed, for example, sanitary paper such as kitchen rolls other than toilet rolls. is there.

  The appearance of an embodiment of a toilet roll that is the subject of the present invention is shown in FIG. The toilet roll 10 in the present embodiment is obtained by winding a laminated continuous sheet 13 in which a front surface tissue 11 and a back surface tissue 12 are overlapped on a cylindrical 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 tissue 11.

  A large number of first embossed portions 11 a that protrude on the side of the surface that overlaps the backside tissue 12 are formed on the front surface tissue 11 in a repetitive pattern as shown in FIG. 1. Similarly, on the back surface tissue 12, a large number of second embossed portions 12a are formed at predetermined intervals in an aligned state so as to protrude toward the side of the surface that overlaps the front surface tissue 11. As described above, the first embossed portion 11a and the second embossed portion 12a are protruded to the surface where the front surface tissue 11 and the rear surface tissue 12 are overlapped, so that the surface texture of the front surface tissue 11 and the rear surface tissue 12 is improved. Can keep. As the patterns of the first embossed portion 11a and the second embossed portion 12a formed on the front surface tissue 11 and the back surface tissue 12, those having an arbitrary pattern other than those illustrated can be adopted as necessary.

  On both side edges in the width direction of the laminated continuous sheet 13, bonding embossed portions 11 b and 12 b extending along the longitudinal direction are formed so as not to protrude outward from both the front and back surfaces of the laminated continuous sheet 13. These bonding embossed portions 11 b and 12 b define a bonding region for integrally bonding the front surface tissue 11 and the back surface tissue 12, and the front surface tissue 11 and the back surface tissue 12 from both side edges in the width direction of the laminated continuous sheet 13. Peeling can be suppressed.

  A manufacturing facility for such a toilet roll 10 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, 12R are two to two times the width of the toilet roll 10 as a product. It has a width of a dozen times. Above the original tissue rolls 11R and 12R, tissue feeding devices 21 for rotating them at a predetermined speed are arranged.

  A tissue feeding device 21 constituting a part of the web feeding means in the present invention includes an arm 23 pivotally supported by a bracket 22 at a base end, an endless belt 24 stretched around the arm 23, and an illustrated figure. A pressing pressure adjusting means and a belt driving source. The pressing pressure adjusting means incorporated between the bracket 22 and the arm 23 is such that the end of the arm 23 in a cantilever state so that the endless belt 24 presses against the outer peripheral surface of the original fabric rolls 11R and 12R with a predetermined pressure. Hold the side. The belt drive source drives the endless belt 24 at a predetermined speed, and rotates the original fabric rolls 11R and 12R with a frictional force. As a result, the belt-shaped long tissue 11L, 12L is pulled out from the raw fabric rolls 11R, 12R at a constant speed. However, the belt drive source in this embodiment electrically changes the turning speed of the endless belt 24. It can be adjusted steplessly.

  The strips of long tissue 11L and 12L drawn out from the original fabric surface tissue roll 11R and the original fabric reverse surface tissue roll 12R are sent to an embossing section 25 arranged adjacent to the original fabric tissue stand 20. On the downstream side of the embossing section 25, a winding section 26 and a terminal processing section 27 are further arranged in order. The embossing part 25 embosses the raw fabric rolls 11R and 12R, respectively, and further embosses for bonding to integrate them. The winding unit 26 cuts the long laminated continuous sheet 13L fed from the embossing unit 25 into a long toilet roll 10L by cutting the continuous laminated sheet 13L at a 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 26, 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 27 glues the end of the long toilet roll 10L discharged from the winding unit 26 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, and is cut | disconnected by the predetermined width, and becomes the individual toilet roll 10. FIG. The tip of the long laminated continuous sheet 13L remaining after the cutting is wound around a new long core disposed in the winding unit 26, and the laminated continuous sheet 13L having a predetermined length is again applied to the long core. It is designed to be wound up.

  The embossed portion 25 in the present embodiment is extracted and enlarged and shown in FIG. The embossing section 25 in the present embodiment includes embossing roll units 28 and 29 and conveying rolls 30 and 31, a joining embossing roll unit 32, a slack eliminating roll 33, and a frame 34 to which these are spaced apart. It is.

  Two sets of embossing roll units 28 and 29 for front and back tissue have embossing rolls 28a and 29a and backup rolls 28b and 29b, and the embossing rolls 28a and 29a are rotatably attached to the frame 34. ing. On the outer peripheral surface of the embossing roll 28a for the surface tissue, uneven portions corresponding to the embossing pattern of the first embossing portion 11a shown in FIG. 1 are formed. Similarly, an uneven portion corresponding to the emboss pattern of the second embossed portion 12a shown in FIG. 1 is formed on the outer peripheral surface of the embossing roll 29a for the backside tissue. Immediately below the embossing roll 28a for the surface tissue, a backup roll 28b for the surface tissue is arranged so as to be movable along the direction facing the embossing roll 28a, and the long tissue 11L is inserted therebetween. Similarly, a back-up tissue backup roll 29b is disposed directly above the back-side tissue embossing roll 29a so as to be movable in the direction facing the embossing roll 29a, and the long tissue 12L is inserted therebetween. .

  The backup rolls 28b and 29b are rotatably attached to roll holders 37 and 38 whose base end portions are swingably attached to the frame 34 around pivots 35 and 36, respectively. The end portions of the roll holders 37 and 38 are respectively pinned to the other end portions of fluid pressure cylinders 39 and 40 whose one ends are pinned to the frame 34. Accordingly, by pulling back the piston rods 39a, 40a of the fluid pressure cylinders 39, 40, the backup rolls 28b, 29b are pressed against the outer peripheral surfaces of the embossing rolls 28a, 29a with a predetermined pressure. As a result, the long tissues 11L and 12L passing between them are embossed.

  The conveyance rolls 30 and 31 constituting a part of the web feeding means in the present invention are more than the embossing roll units 28 and 29 in the conveyance direction of the long tissues 11L and 12L inserted through the embossing roll units 28 and 29 described above. Arranged upstream. The transport rolls 30 and 31 for the front surface tissue and the back surface tissue rotate in synchronization with the previous tissue feeding device 21 and feed the long tissues 11L and 12L toward the embossing roll units 28 and 29.

  The joining embossing roll unit 32 has an embossing wheel 32a and a receiving roll 32b that are vertically opposed to each other, and the receiving roll 32b is rotatably attached to the frame 34 so as to rotate synchronously with the embossing rolls 28a and 29a. ing. Emboss patterns corresponding to the bonding embossed portions 11b and 12b shown in FIG. 1 are formed on the outer peripheral surfaces of the embossing wheel 32a and the receiving roll 32b. The embossing wheel 32a located below the receiving roll 32b is rotatably attached to the distal end portion of the piston rod 41a of the fluid pressure cylinder 41 whose base end is pinned to the frame 34. The embossing wheel 32a is pressed against the receiving roll 32b that is driven and rotated by the fluid pressure cylinder 41 with a predetermined pressing force.

  In addition, it is also possible to reverse the attachment structure of the embossing wheel 32a and the receiving roll 32b. That is, the embossing wheel 32a may be rotatably attached to the frame 34 and rotated together with the embossing rolls 28a and 29a. In this case, the receiving roll 32b can be pressed against the outer peripheral surface of the embossing wheel 32a by the fluid pressure cylinder 41 in the same manner as the backup rolls 28b and 29b described above, and can be rotated by a frictional force.

  The embossing rolls 28a and 29a and the embossing roll unit 32 for joining are formed of metal at least, but the surface portions of the backup rolls 28b and 29b are hard rubbery elastic such as hard synthetic rubber that can be elastically deformed. It is formed by the body.

  A slack eliminating roll 33 for removing slack of the long laminated continuous sheet 13 </ b> L drawn from the embossing section 25 to the winding section 26 is disposed above the joining emboss roll unit 32. A base end portion of a slack eliminating arm 42 that rotatably supports the slack eliminating roll 33 is rotatably attached to the frame 34 via a pivot 43.

  The above-described embossing roll units 28 and 29 and the conveying rolls 30 and 31, the bonding embossing roll unit 32, the slack eliminating roll 33 and the rotation axes of the pivots 35, 36 and 43 are set in parallel to each other. The embossing rolls 28a and 29a and the receiving roll 32b are assembled with a power transmission mechanism (not shown) for synchronously rotating them. The other embossing wheels 32a, backup rolls 28b, 29b, etc. are driven to rotate by frictional forces accompanying the conveyance of the original fabric tissue rolls 11R, 12R.

  The portion of the power transmission mechanism relating to the embossing roll 28a for the front surface tissue is extracted and enlarged and shown in FIG. 4, and the shape of the right side surface is schematically shown in FIG. It has the same configuration. The embossing section 25 in this embodiment incorporates means for steplessly changing the feeding speed of the long tissues 11L and 12L with respect to the embossing roll units 28 and 29 rotating at a constant peripheral speed. The means for changing the feeding speed of the long tissues 11L, 12L in a stepless manner includes a pair of drive pulleys 44a, 44b, a variable pulley 45, an endless belt 46, and a belt tension adjusting means 47. One drive pulley 44 a transmits power to the transport rolls 30 and 31 that are part of the web feeding means, and the other drive pulley 44 b transmits power to the emboss units 28 and 29. A variable pulley 45 whose pitch diameter can be arbitrarily changed by manually or electrically operating the operation drum 48 is connected to the embossing rolls 28a and 29a. The endless belt 46 wound around the other drive pulley 44 b and the variable pulley 45 is held constant by belt tension adjusting means 47.

  The drive pulleys 44a and 44b are attached to the drive pulley shaft 44c, and the variable pulley 45 is attached to the variable pulley shaft 45c. The drive pulley shaft 44c and the variable pulley shaft 45c are rotatably attached to a subframe 49 that is integrally fixed to the frame 34 so that their rotational axes are parallel to each other. In this case, the drive pulley shaft 44c and the variable pulley shaft 45c are arranged so that their rotational axes are orthogonal to the rotational axes of the embossing rolls 28a and 29a. A prime mover 50, which is a drive source for driving the web feeding means, is connected to the drive pulley shaft 44c via a reduction gear (not shown). The prime mover 50 in the present embodiment is a variable speed motor, that is, a servo motor that can change its rotation speed steplessly by adjusting a supply voltage or a supply current to the prime mover 50. Also serves as a belt drive source. A driven bevel gear 52 is fixed to a boss 51 formed at one end in the longitudinal direction of the embossing rolls 28a, 29a protruding outside the frame 34, and a driving bevel gear 53 that meshes with the driven bevel gear 52 is first. Are attached to a variable pulley shaft 45c.

  Even if the rotational speed of the drive pulley shaft 44c is changed, the pitch diameter of the variable pulley 45 can be changed steplessly so that the peripheral speed of the embossing rolls 28a and 29a becomes a preset peripheral speed. This can be performed by operating the operation drum 48 of the variable pulley 45 manually or electrically. More specifically, when the rotational speed of the drive pulley shaft 44c is decreased, the pitch diameter of the variable pulley 45 is increased, and conversely, when the rotational speed of the drive pulley shaft 44c is increased, the variable pulley 45 Reduce pitch diameter. Thereby, the peripheral speed of the embossing rolls 28a and 29a can be maintained constant. When it is necessary to change the feed speed of the long tissues 11L and 12L fed to the embossing rolls 28a and 29a according to the quality of the paper, the rotational speed of the prime mover 50 is changed and the pitch diameter of the variable pulley 45 is changed. Thereby, the peripheral speed of the embossing rolls 28a and 29a is always maintained constant.

  It is not necessary to incorporate the variable speed mechanism as described above between one drive pulley 44a for the transport rolls 30 and 31 and the transport rolls 30 and 31.

  The belt tension adjusting means 47 in this embodiment includes a fluid pressure cylinder 54 attached to the sub-frame 49 and a tension roller 55 rotatably attached to the tip of the piston rod 54a of the fluid pressure cylinder 54. The tension roller 55 is pressed against the outer peripheral surface of the endless belt 46 with a predetermined pressure by the fluid supplied to the fluid pressure cylinder 54, and is rotated along with the turning of the endless belt 46. As this belt tension adjusting means, any configuration other than the present embodiment can be adopted. For example, the drive pulley 44b is attached to the subframe 49 so as to be displaceable along the opposing direction to the variable pulley 45 together with the transport rolls 30 and 31. Then, the drive pulley 44b is urged together with the transport rolls 30 and 31 in a direction away from the variable pulley 45 using a fluid pressure cylinder.

  In this way, 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 section 25, and is respectively first and second. Embossed portions 11a and 12c are formed. Thereby, tension and flexibility are given to the long tissues 11L and 12L. Next, the embossing portions 11b and 12b for joining are formed while passing between the embossing wheel 32a and the receiving roll 32b, and the long tissues 11L and 12L are overlapped with each other and integrally joined in a laminated state.

  The above-described bevel gears 52 and 53 can be omitted, and the pulleys 44b and 45 can be directly connected to the embossing rolls 28a and 29a and the conveying rolls 30 and 31, respectively. In addition, the prime mover 50 can be directly connected to the embossing roll units 28 and 29 instead of the feeding means of the long tissues 11L and 12L.

  The side surface shape of the main part of another embodiment of such an embossed part 25 is shown in FIG. The planar shape obtained is schematically shown in FIG. In FIGS. 6 and 7, elements having the same functions as those of the previous embodiment are designated by the same reference numerals, and redundant descriptions are omitted. That is, in the present embodiment, means for changing the feeding speed of the long tissues 11L and 12L in a stepless manner includes the drive pulley 44b, the variable pulley 45, the endless belt 46, and the belt tension adjusting means 47. The driving pulley 44b is connected to the embossing rolls 28a and 29a, and the variable pulley 45 that can arbitrarily change the pitch diameter is connected to the conveying rolls 30 and 31. The endless belt 46 wound around the drive pulley 44 b and the variable pulley 45 is kept constant in tension by the belt tension adjusting means 47. A prime mover 50, which is a drive source for driving the embossing rolls 28a and 29a, is connected via a reduction gear (not shown). In this case, it is possible to provide a separate drive source for the tissue feed device 21, but the transport rolls 30, 31 and the tissue feed device 21 are connected via a power transmission mechanism to rotate the transport rolls 30, 31. May be transmitted to the tissue feeding device 21 side.

  In the case of this embodiment, it is only necessary to manually or electrically operate the operation drum 48 to adjust the pitch diameter of the variable pulley 45 connected to the transport rolls 30 and 31. Thereby, the feeding speed of the long tissues 11L and 12L for the embossing roll units 28 and 29 rotating at a constant peripheral speed can be changed very easily.

  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.

DESCRIPTION OF SYMBOLS 10 Toilet roll 10L Long toilet roll 11,12 Tissue 11a, 12a Embossed part 11b, 12b Bonding embossed part 11R, 12R Original tissue roll 11L, 12L Long tissue 13 Laminated continuous sheet 13L Long laminated continuous sheet 14 Winding core 20 Raw fabric tissue stand 21 Tissue feeding device 22 Bracket 23 Arm 24 Endless belt 25 Embossing section 26 Winding section 27 End processing section 28, 29 Emboss roll unit 28a, 29a Emboss roll 28b, 29b Backup roll 30, 31 Transport roll 32 Embossing roll unit for joining 32a Embossing wheel 32b Receiving roll 33 Slack eliminating roll 34 Frame 35, 36 Axis 37, 38 Roll holder 39, 40 Fluid pressure series Dares 39a, 40a Piston rod 41 Fluid pressure cylinder 41a Piston rod 42 Slack removal arm 43 Pivot 44a, 44b Drive pulley 44c Drive pulley shaft 45 Variable pulley 45c Variable pulley shaft 46 Endless belt 47 Belt tension adjusting means 48 Operation drum 49 Subframe 50 Motor 51 Boss 52 Driven bevel gear 53 Driven bevel gear 54 Fluid pressure cylinder 54a Piston rod 55 Tension roller

Claims (4)

An embossing roll unit for embossing a belt-like web by rotating at a constant peripheral speed;
Web feeding means for feeding the web toward the embossing roll unit;
An embossing apparatus comprising: means for steplessly changing a web feeding speed by the web feeding means.   A driving source for driving the web feeding means; and the means for steplessly changing the web feeding speed includes: a driving pulley coupled to the web feeding means; and one of the embossing roll units A variable pulley that can be arbitrarily changed in pitch diameter, an endless belt wound around the drive pulley and the variable pulley, and a belt tension adjusting means for keeping the tension of the endless belt constant. The embossing apparatus according to claim 1.   The embossing apparatus according to claim 2, wherein the drive source is a variable speed motor.   A drive source for driving the embossing roll unit is further provided, and the means for changing the feeding speed of the web steplessly includes a driving pulley connected to one of the embossing roll units, and the web feeding means. It has a variable pulley that can be connected and the pitch diameter can be arbitrarily changed, an endless belt wound around the drive pulley and the variable pulley, and a belt tension adjusting means for keeping the tension of the endless belt constant. The embossing apparatus of Claim 1 characterized by the above-mentioned.

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