JP2007136861A - Embossing roll - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an embossing roll which can curtail a time for changing an embossing pattern and contract a storage space. <P>SOLUTION: The embossing roll 1 having a cylindrical core 2 whose both ends are pivoted rotatably by bearings and an embossing plate 3 in which the embossing pattern embossing a fiber web is formed and which is fitted attachably/detachably to the peripheral surface of the core 2 is constituted. The embossing plate 3 is made an arcuame plate which is divided into a plurality of parts in relation to the circumferential direction of the core 2 and formed to parallel the peripheral surface of the core 2. The peripheral surface of the core 2 is covered with at least two embossing plates 3, 3, etc. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an embossing roll for embossing a fiber web.

When manufacturing household hygiene thin paper such as toilet paper rolls, paper towels, paper tissues, and napkins, embossing is currently applied as necessary to increase the bulkiness and softness of the fiber web.
When changing the embossing pattern in this embossing, it is necessary to replace the entire embossing roll. However, since this change required considerable work and time, production efficiency was deteriorated.
Therefore, Patent Document 1 includes a roll core that rotates about an axis, and a cylindrical interchangeable sleeve on the outer peripheral surface of the core, and an emboss pattern on the outer cylindrical surface of the sleeve. The embossing roll which inserts and fixes this sleeve to a core is proposed. In the case of this embossing roll, when changing the embossing pattern, remove the embossing roll that was previously attached, and then insert and fix another sleeve to shorten the time for changing the embossing pattern. It is something that can be done.
JP 2005-510381 A

However, in the above invention, the interchangeable sleeve has a cylindrical shape and is the same size as a normal embossing roll, so the space for storing the replaced sleeve needs the same size as the conventional one. However, it was disadvantageous in terms of reducing storage space.
Accordingly, a main object of the present invention is to provide an embossing roll capable of reducing the time for changing the embossing pattern and reducing the storage space.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
According to the first aspect of the present invention, a cylindrical core whose both ends are pivotally supported by a bearing and an emboss pattern for embossing the fiber web are formed, and the core is detachably attached to the outer peripheral surface of the core. An embossing roll provided with an embossing plate, the embossing plate being divided into a plurality of parts in the circumferential direction of the core and an arc-shaped plate formed along the outer peripheral surface of the core And an embossing roll characterized in that the outer peripheral surface of the core is covered with at least two embossing plates.

<Invention of Claim 2>
The invention according to claim 2 is the embossing roll according to claim 1, wherein the embossing roll is divided into a plurality of parts in the axial direction of the core.

<Invention of Claim 3>
A third aspect of the present invention is the embossing roll according to the first or second aspect, wherein the arc shape of the embossing plate is 1/4, 1/3, or semicircular.

(Function and effect)
The emboss plate is an arc-shaped plate that is divided into a plurality of parts in the circumferential direction of the core and is formed along the outer peripheral surface of the core. The outer peripheral surface of the core is formed by at least two emboss plates. Since the removed embossing plate is divided into at least two or more, the storage space can be reduced.
Moreover, the storage space can be further reduced by adopting a configuration in which the embossing roll is divided into a plurality of parts in the axial direction of the core.
Furthermore, the arc shape of the embossing plate is ¼, ３ or semicircular so that the pressure applied to one embossing plate can be dispersed in a mechanically stable state. A stable embossing operation can be performed on the fiber web.

<Invention of Claim 4>
According to a fourth aspect of the present invention, the engagement of the embossing plate with the core is performed by expanding or contracting the outer peripheral surface of the core by hydraulic pressure and / or pneumatic pressure. 3. The embossing roll according to any one of 3 above.

(Function and effect)
By adopting a configuration in which engagement of the emboss plate with the core is performed by expanding or contracting the outer peripheral surface of the core by hydraulic pressure and / or pneumatic pressure, the removal work of the emboss plate is facilitated, The fixing to the core is assumed to be reliable.

  According to the present invention, there are advantages that the time required for changing the emboss pattern can be shortened and the storage space can be reduced.

Embodiments of the present invention will be described below.
The embossing roll which concerns on this invention gives embossing with respect to the fiber web (continuous sheet | seat) for manufacturing toilet paper, tissue paper, kitchen paper, etc., and generally faces this embossing roll. The embossing means is formed in cooperation with the opposing roll, and embossing is given to the fiber web.

  The embossing roll 1 according to the present invention is formed with a cylindrical core 2 whose both ends are pivotally supported by bearings (not shown), an embossing pattern for embossing the fiber web, and the core 2. And an embossing plate 3 which is detachably attached to the outer peripheral surface.

  As shown in FIGS. 1 and 2, the emboss plate 3 is an arc-shaped plate that is divided into a plurality of parts in the circumferential direction of the core 2 and is formed along the outer peripheral surface of the core 2. It is set as the structure by which the outer peripheral surface of the core 2 is coat | covered by the embossing plates 3, 3, ... divided | segmented into several sheets with respect to the circumferential direction of the core 2. As shown in FIG. The embossing plate 3 is configured to cover at least two embossing plates 3 in the circumferential direction of the core 2 and cover the outer peripheral surface of the core 2, thereby reducing the storage space of the removed embossing plate 2. be able to.

  The arc shape of the emboss plate 3 can be divided into semicircles (2 equally divided circles) or more (for example, 4 equally divided circles, 5 equally divided circles, etc.), but the arc center angle (inner angle) is 60 degrees. Since the center angle of the arc is 60 degrees, 120 degrees, 180 degrees, etc., multiples of 60, such as 1/4 circle (four equally divided circles), 1/3 yen (3 It is preferable that the emboss plate 3 is configured to be an equally divided circle) or a semicircle (a equally divided circle). With this shape, the pressure applied to one embossing plate 3 can be dispersed, and a stable embossing operation can be performed on the fiber web. In addition, in embodiment shown in FIG. 2, it is attached for every 1/3 circle (three equally divided circles).

  Moreover, the embossing plate 3 is divided | segmented into plurality with respect to the axial direction of the core 2, and is divided into three sections (compartments) in the embodiment shown in FIG. For this reason, the storage space can be further reduced.

  Note that this section is preferably divided into two to five sections. In only one section, the length of one emboss plate is the total length of the core (for example, the total length of the core used in toilet paper, tissue paper, kitchen paper, etc. is 1000 to 4500 mm). Cause a problem. Moreover, when attaching, a several person is required and there exists a possibility that efficiency may worsen. On the other hand, if it is 6 sections or more, the number of emboss plates increases, and the accuracy of covering the outer peripheral surface of the core may deteriorate. For example, if there are three emboss plates per section, there will be 18 emboss plates to be attached in six sections or more, and the work efficiency of attachment deteriorates.

  In the embodiment shown in FIG. 1 and FIG. 2, as described above, the emboss plate is attached every 1/3 circle (3 equally divided circles) and divided into 3 sections, covering a total of 9 cores. It is supposed to be.

  The shape of the convex part of the emboss plate 3 is not specifically limited. For example, in a plan view, a square, rhombus, circle, ellipse, polygon, star, and the like have a substantially flat top surface, or a substantially bow-shaped top surface with a bulging center. Although not shown in the figure, the shape may be a so-called Mt. Fuji shape mainly composed of a top portion and a ridge line portion connected between the top portion and an adjacent top portion. If the shape is Mt. Fuji, the so-called Mt. Fuji-type embossing is attached to the fiber web, which improves bulkiness and absorbability. Other examples of the Mt. Fuji type embossing include those disclosed in Japanese Patent Application Laid-Open No. 1-11096.

  The embossing plate 3 is attached to the core 2 by expanding or contracting the outer peripheral surface of the core 2 by hydraulic pressure and / or air pressure, and as a result, the end edge of the embossing plate 3 is engaged with the core. It is the structure fixed by. Specifically, referring to FIG. 4 and FIG. 5 in which the A portion (attachment portion) shown in FIG. 2 is enlarged, a fixed-side plate stopper 4 fixed in advance to the core 2 in the axial direction of the outer peripheral surface of the core 2. And a guide-side plate stopper 5 which can be freely projected and retracted on the outer peripheral surface of the core 2 are attached as a pair so as to correspond to one emboss plate 3. When the emboss plate 3 is attached, as shown in FIG. 4, the engaged portion 3a formed at one end of the emboss plate 3 is fixed to the fixed side while the guide side plate stopper 5 is submerged (lowered). The engaged portion 3b formed on the other end is hooked on the plate stopper 4 and is positioned on the projected portion of the guide side plate stopper 5, and in this state, as shown in FIG. The portion to be engaged 3b is hooked by being projected from above and fixed to the core 2.

  The guide-side plate stopper 5 includes a pusher cam 6 and a cam holder 7 to form a guide stopper. The lower portion of the pusher cam 6 and each of the contact portions of the cam holder 7 that are in contact with the pusher cam 6 are processed into a wave shape in which the members are formed in an uneven shape. By being processed in the shape of a sine curve of a period, the convex portion and the concave portion of the pusher cam 6 are fitted into the concave portion and the convex portion of the cam holder 7, respectively, as shown in FIG. The initial state shown in FIG. 6 is a state in which the guide-side plate stopper 5 is submerged as shown in FIG. 4, and by pressing the pusher cam 6 from the side as shown in FIG. And the convex portion of the cam holder 7 are brought into contact with each other, the pusher cam 6 is raised, and the guide-side plate stopper 5 projects from the outer peripheral surface in conjunction therewith.

  The pusher cam 6 is pushed out from the side surface by oil or air sent via a hydraulic tube or an air tube (not shown) attached to both side surfaces or one side surface of the core 2. The pusher cam 6 is pushed out by hydraulic pressure or air pressure, and the engagement relationship between the pusher cam 6 and the cam holder 7 is disengaged, so that the projection of the pusher cam 6 and the apex of the projection of the cam holder come into contact with each other. As a result, the pusher cam 6 rises to the maximum position, and in conjunction with this, the guide side plate stopper 5 protrudes from the outer peripheral surface of the core 2 and engages with the engaged portion 3 a of the emboss plate 3. It is.

  The guide-side plate stopper 5, the pusher cam 6, and the cam holder 7 may be divided into sections (sections) divided into a plurality of sections in the axial direction of the core 2, but are integrated from the viewpoint of operability. Preferably it is.

  One embodiment of an embossing device employing the above-described embossing roll will be described below with reference to FIG. This embossing device includes two embossing means each composed of embossing rolls 11 and 21 and opposing rolls 12 and 22 arranged in parallel in the vertical direction, and on the right side is an embossing roll 11 and an opposing surface. The embossing means 10 having a roll 12 (hereinafter also simply referred to as a pair of rolls 11 and 12), and an embossing roll 21 and an opposing roll 22 (on the left side) facing the embossing roll 21 and 12 on the left side, like the pair of rolls 11 and 12. Hereinafter, an embossing means 20 having a pair of rolls 21 and 22 is also provided in parallel.

  In this apparatus, as shown in FIG. 3, the fiber web W <b> 1 flows to the opposite roll 12 in the illustrated example in the diagonally lower left direction of the drawing, and then the flow direction is opposite to the flow direction along the peripheral surface of the opposite roll 12. Instead, embossing is given through the space between the opposing roll 12 and the embossing roll 11 (between the first rolls). Similarly, the fiber web W2 is embossed by passing between the opposing roll 22 and the embossing roll 21 (between the second rolls) in a diagonally upper right direction in the drawing. And fiber web W1 and W2 are bonded together between embossing roll 11 and embossing roll 21 (between 3rd rolls), fiber web W3 is formed, and then fiber web W3 is press roll 23 and embossing roll 21. Between the two and the fourth roll (between the fourth rolls) to make the bonding dense.

  Here, the bonding mechanism will be described. On the right side of the embossing roll 11, an adhesive applying means 30 for applying an adhesive is disposed. The adhesive application means 30 includes an adhesive box 31 in which the adhesive is stored, an adjustment roll 32 that adjusts the amount of adhesive, and an adhesive transfer roll 33 that transfers the adhesive to the fiber web. Yes. By such an adhesive applying means 30, an adhesive is applied to the top of the embossed convex portion (not shown) of the one-ply fiber web W1 to which embossing has been applied. The top of the embossed convex part of the fiber web W1 to which the adhesive is applied is the top or embossed concave part (not shown) of the embossed convex part (not shown) of the one-ply fiber web W2 applied by the embossing means 20. The two-ply fiber web W3 that has been embossed in a “Tip to Tip” form or a “nested” form is formed.

  When the fiber webs W1 and W2 are made of one or more raw materials selected from the group of, for example, pulp fiber, regenerated fiber and rayon, one of the embossing roll 11 and the opposing roll 12 is given. Alternatively, it is preferable that both or both of the embossing roll 21 and the opposing roll 22 be heated by heating. When the roll is heated to give emboss, the emboss is given clearly and clearly.

  The embossing plate and the opposing rolls 12 and 22 in the embossing rolls 11 and 21 can be made of metal, but the opposing rolls 12 and 22 are elastic rolls having at least surfaces 12a and 22a made of rubber or the like, The surface (circumferential surface) is preferably made of metal having a plurality of convex portions. According to the combination of a metal roll and an elastic roll (so-called steel rubber method), the problem of adjusting the clearance of the roll and the problem of clogging the roll with paper dust or the like do not occur. In this embodiment, a steel rubber system is used. In addition, in the case of an embossing roll, a metal roll here shall mean the embossing roll which made the embossing plate metal (hereinafter the same).

  When heating only one of the embossing plate and the opposing rolls 12 and 22 in the embossing rolls 11 and 21, the heating roll may be an elastic roll, but is preferably a metal roll. This is because the metal roll has better thermal conductivity and the effect of heating is exhibited effectively, and when the metal roll is heated, the sheet is heated in a form corresponding to the shape of the emboss. This is because the embossing given becomes clearer and clearer.

  The surface temperature of the heating roll is such that the pair of rolls 11, 12, 21 and 22 are both metal rolls, a combination of metal rolls and elastic rolls, or both are heated, or only one of them is heated. Regardless of whether the metal roll or the elastic roll is heated, it is preferably 40 to 140 ° C, more preferably 60 to 120 ° C, and more preferably 80 to 100 ° C. Particularly preferred. When the surface temperature is too low, the effect that the emboss becomes clear is not sufficiently exhibited. On the other hand, if the surface temperature is too high, energy loss is caused, and the sheet may be seized or an embossed sheet such as toilet paper to be manufactured may be hardened. In particular, in the present embodiment, the chemical solution to be applied next evaporates immediately and may not spread throughout.

  In the case of the above heating method, embossing is preferably performed so that the embossing pressure (nip pressure (linear pressure)) between the pair of rolls 11, 12, 21 and 22 is 5 to 30 kg / cm, It is more preferable to carry out so that it may become 10-25 kg / cm, and it is especially preferable to carry out so that it may become 15-20 kg / cm. When the embossing pressure is too low, the effect that the embossing becomes clear is not sufficiently exhibited. On the other hand, if the embossing pressure is too high, the sheet may be torn (the possibility of paper breakage).

  When the pair of rolls 11, 12, 21 and 22 is a combination of a metal roll and an elastic roll, the elastic roll preferably has a Shore hardness of 50 to 90, preferably 60 to 70. It is more preferable that If the Shore hardness is too low, that is, if the elastic roll surface is too soft, there is a risk of paper breakage. On the other hand, if the Shore hardness is too high, that is, if the elastic roll surface is too hard, the fiber web may not be embossed.

By the way, according to the above heated steel rubber system, the basic weight of a sheet | seat can be 12.0-17.0g / m < ² >, for example. When the basis weight is small as described above, it is generally considered that embossing cannot be given clearly and clearly, but it is possible in the case of the above method.

It is a perspective view of the embossing roll which concerns on this invention. It is the cross-sectional view (II sectional drawing). It is a schematic diagram of one embodiment of an embossing device using an embossing roll according to the present invention. It is an expanded sectional view of the attachment part (A part) to the core of the embossing roll of an initial state. It is an expanded sectional view of the attachment part (A part) to the core of the embossing roll of an engagement state. It is a schematic diagram explaining the guidance stopper of an initial state. It is a schematic diagram explaining the guidance stopper of the state where the guidance side plate stopper protruded.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Embossing roll, 2 ... Core, 3 ... Embossing plate, 4 ... Fixed side plate stopper, 5 ... Guide side plate stopper, 6 ... Pusher cam, 7 ... Cam holder, 10 ... Embossing provision means, 11 ... Embossing roll, 12 ... opposing roll, 20 ... embossing means, 21 ... embossing roll, 22 ... opposing roll, 23 ... press roll, 30 ... adhesive applying means, W1, W2 ... fiber web (1 ply), W3 ... fiber web (2 ply) ).

Claims (4)

Embossing comprising: a cylindrical core whose both ends are pivotally supported by bearings; and an embossing plate formed with an embossing pattern for embossing the fiber web and removably attached to the outer peripheral surface of the core A roll,
The emboss plate is an arc-shaped plate that is divided into a plurality of parts in the circumferential direction of the core and is formed along the outer peripheral surface of the core.
The outer peripheral surface of the core is covered with at least two embossed plates.
Embossing roll characterized by that.   The embossing roll according to claim 1, wherein the embossing roll is divided into a plurality of parts in the axial direction of the core.   The embossing roll according to claim 1 or 2, wherein the arc shape of the embossing plate is a ¼ circle, a ３ circle, or a semicircle.   The engagement of the embossing plate with the core is performed by expanding or contracting the outer peripheral surface of the core by hydraulic pressure and / or pneumatic pressure. Embossing roll.

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