JP6947117B2 - Tish manufacturing method - Google Patents

Description

This case relates to a method of manufacturing tissue paper.

The following various steps are known as steps carried out in the production of tissue paper (see Patent Documents 1 and 2).
・ Winding process: Winding the base paper set in which strip-shaped base papers are overlapped on a roll ・ Unwinding process: Unwinding the base paper set of the roll wound in the winding process ・ Cutting process: Rolling the base paper set in the longitudinal direction・ Engagement process: Engage the base papers that make up the base paper in the thickness direction ・ Laminating process: Laminate the base papers by stacking multiple strips of base paper

Further, as a manufacturing method in which the above-mentioned steps are combined, various manufacturing methods listed below have been developed.
Examples of the manufacturing method in which the engaging steps are combined include the following manufacturing method C.
-Manufacturing method C: The following manufacturing method S can be mentioned as a manufacturing method in which the cutting steps in which the engaging step is performed only after the feeding step are combined.
-Manufacturing method S: Perform a one-step cutting process before the winding process.

Japanese Patent No. 3628980 Japanese Patent No. 5237250

However, from the above-mentioned production method C, the following problem C can be mentioned.
-Problem C: Positional deviation of the base papers in the base paper set to be fed The above-mentioned problem C is the thickness direction of the base papers if the base papers forming the base paper set to be fed out are not engaged as in the above-mentioned manufacturing method C. It is a problem that the position shift in the width direction may be caused, and there is also a problem that the base paper set may be wrinkled or twisted due to this position shift.

Further, from the above-mentioned production method S, the following problem S can be mentioned.
-Problem S: Occurrence of wrinkles and twists on the base paper set In the above-mentioned problem S, if a one-step cutting process is performed before the winding process as in the above-mentioned manufacturing method S, the base paper set is cut in a plurality of stages. Since the dimensions in the width direction are greatly reduced before and after cutting compared to the manufacturing method, the relative speed fluctuations between the base paper sets that are independent in the width direction are likely to occur, which causes wrinkles and twists in the base paper sets. be.
Therefore, there is room for improvement in improving the quality of the manufactured tissue paper.

The tissue manufacturing method of this case was devised in view of the above-mentioned problems, and one of the purposes is to improve the quality of the manufactured tissue paper. Not limited to this purpose, it is also possible that the actions and effects derived from each configuration shown in the “mode for carrying out the invention” described later and which cannot be obtained by the conventional technique are exhibited. It can be positioned as another purpose.

The tissue manufacturing method disclosed here includes a winding step of winding a base paper set in which a plurality of strip-shaped base papers are superposed on a roll, and a base paper set of the roll wound up in the winding step. It includes a feeding step of feeding out, a cutting step of cutting the base paper set along the longitudinal direction of the base paper set, and an engaging step of engaging the base papers forming the base paper set with each other.
In the cutting step, the upstream cutting step of cutting the base paper set is further cut on the upstream side of the winding step, and the base paper set cut in the upstream cutting step is further cut on the downstream side of the feeding step. It has a downstream cutting process.
The engaging step includes a temporary engaging step of engaging the base papers forming the base paper assembly at an arbitrary position on the upstream side of the winding step, and the base paper assembly on the downstream side of the feeding step. It has a main engaging step of engaging the base papers forming the same with each other at a predetermined position corresponding to the edge of the tissue product.

According to the tissue manufacturing method of this case, the quality of the manufactured tissue paper can be improved.

It is a schematic diagram which shows the outline of the process of manufacturing a tissue paper. It is a schematic diagram which shows a paper machine. It is a schematic diagram which shows the laminating machine. It is a schematic diagram which shows the folding machine, (A) is the XX arrow view of (B). It is a flowchart which shows the procedure of manufacturing a tissue paper. It is a figure which shows the modification of the folding machine.

Hereinafter, a mode for carrying out a method for producing tissue paper (hereinafter abbreviated as “tish paper production method”) will be described.
In this embodiment, the upstream and downstream are determined based on the transport direction of the base paper and the base paper set in which the base papers are overlapped (hereinafter, the "base paper" and the "base paper set" are collectively referred to as "base paper and the like"). For the base paper, etc., determine the three directions of the longitudinal direction, the width direction, and the thickness direction. The longitudinal direction is a direction extending in a strip shape on the extending surface of the base paper or the like. This longitudinal direction is along the transport direction. The width direction is a direction orthogonal to the longitudinal direction on the extending surface of the base paper or the like. The thickness direction is a direction orthogonal to both the longitudinal direction and the width direction. Tish paper made of base paper or the like is manufactured by cutting or dividing the base paper assembly in the transport direction or the width direction and folding it.

[I. One Embodiment]
In one embodiment described below, as a premise for explaining the tissue manufacturing method, the configuration of an apparatus for producing tissue paper (hereinafter abbreviated as “tish manufacturing apparatus”) will be described with reference to FIGS. 1 to 4. After that, the configuration of the tissue manufacturing method will be described with reference to FIG. Then, the action and effect of the tissue manufacturing method of the present embodiment will be described.

[1. Configuration of tissue manufacturing equipment]
First, the process of manufacturing tissue paper will be outlined with reference to FIG.
The tissue paper manufacturing equipment is roughly divided into _{three parts P 1} , P ₂ , and P _3.
In the first part P _1, strip-shaped base paper W by the paper machine 1 shown in FIG. 2 is papermaking.
In the second part P _2, wherein a plurality of base paper W that has been papermaking in the first part P ₁ by laminating machine 3 shown in FIG. 3 are superimposed. When the base papers W are superposed on each other, a base paper set WP having a multi-layer structure composed of a plurality of base papers W is manufactured. Here, a base paper set WP having a two-layer structure (so-called “2-ply”) is illustrated.
In the third part P _3, the sheet sets WP that has been superimposed by folding machine 5 in the second part P ₂ shown in FIG. 4 is folded. Then, the base paper assembly WP is divided into predetermined transport direction dimensions.

In the first part P _1, papermaking base paper W is wound into a roll. The base paper W wound up in the first part P ₁ is transported to _{the second part P 2.}
In the second part P _2, the fed-out sheet W How to superimposed the sheet set WP is wound into a roll. In the second part P _2, a predetermined speed (hereinafter referred to as "upstream transport speed") such as a base W in V _U, WP is transported. The base paper set WP wound up in the second part P ₂ is transported to _{the third part P 3.}

The roll-shaped base paper set WP transported to the third part P ₃ is unwound after being partially stripped from its outer peripheral edge. In the third part P _3, predetermined speed slower than the upstream transport speed V _U (hereinafter referred to as "downstream transport speed") sheet sets WP is transported by V _D.
In the present embodiment, the upstream transport speed V _U is set to 500 to 1500 [m / min], and the downstream transport speed V _D is set to 10 to 150 [m / min].

That is, the first part P ₁ is the first volume preparative Part 15 (see FIG. 2) is provided on the most downstream. The second part P _{2 is provided with an upstream transport part P 20} (simply indicated by an arrow in FIG. 1) for transporting base paper and the like W and WP at an upstream transport speed V _U , and is located at the most upstream of the _{upstream transport part P 20.} the first feeding part 30 (see FIG. 3) is provided, the second volume collected by part 38 (see FIG. 3) is provided on the most downstream of the upstream transport part P _20. The third part P _{3 is provided with a downstream transport part P 30} (simply indicated by an arrow in FIG. 1) for transporting the base paper set WP at a downstream transport speed V _D , and the second feed is extended to the most upstream of the _{downstream transport part P 30.} Part 50 (see FIG. 4) is provided. Further, a first transport part P ₁₂ is provided between the first part P ₁ and the second part P _2, and a second transport part P ₂₃ is provided between the second part P ₂ and the third part P _3. Be done.

The above three parts P ₁ , P ₂ , and P ₃ are subdivided into various parts, and some of the subdivided parts are set in a plurality of stages.
Specifically, the engaging parts 34 and 53 for engaging the base papers W forming the base paper set WP are set in two stages. Of these engaging parts 34 and 53, one is the temporary engaging part 34 of the laminating machine 3, and the other is the main engaging part 53 of the folding machine 5. Hereinafter, regarding the engagement pattern between the base papers W by the engagement parts 34 and 53, the engagement pattern of the temporary engagement part 34 is referred to as a "temporary pattern", and the engagement pattern of the main engagement part 53 is referred to as a "main pattern". Refer to.

Further, the cutting parts 36 and 54 for cutting the base paper set WP along the longitudinal direction are also set in two stages. Of these cutting parts 36 and 54, one is the upstream cutting part 36 of the laminating machine 3, and the other is the downstream cutting part 54 of the folding machine 5.
In addition, calendar parts 14 and 33 for smoothing the base paper W or the base paper set WP by pressure contact in the thickness direction are also provided in the paper machine 1 and the laminating machine 3, respectively.
Hereinafter, each configuration of the paper machine 1, the laminating machine 3, and the folding machine 5 will be described.

[1-1. Paper machine]
The configuration of the paper machine 1 will be described in detail with reference to FIG.
The paper machine 1 is a tissue machine that makes a strip-shaped base paper W from raw materials.
The paper machine 1 is provided with a paper making part 10 for making the base paper W, and is also provided with a first winding part 15 for winding the base paper W made in the paper making part 10.

The papermaking part 10 includes a wire part 11 for making a wet base paper W (wet paper) from a raw material, a press part 12 for dehydrating the wet base paper W, and a dryer part 13 for drying the water-squeezed base paper W. , The dry base paper W is subdivided into calender part 14 for smoothing. The base paper W that has passed through the calendar part 14 is wound up in the first winding part 15.
Hereinafter, each part 11, 12, 13, 14, and 15 of the paper machine 1 will be described in the order of manufacturing processes.

<Wire part>
The wire part 11 is provided with a head box H for ejecting a slurry which is a raw material of the base paper W. As the slurry, a raw material liquid in which pulp fibers are suspended is used.
The wire part 11 is provided with _{two types of wire belts B T} and B _{C, which} are partially wound around the outer circumference of the _{forming roll R T.}

These wire belts B _T and B _C are mesh-shaped endless belts wound around a belt transport roll. One of the wire belts B _T and B _{C is a forming wire belt B T} wound around the slurry on the side opposite to the forming roll _RT side (outer peripheral side). _{The other is a transport wire belt B C wound around the forming roll R T} side (inner peripheral side) with respect to the slurry.
A wet base paper W is produced by dehydrating the slurry injected between the _{wire belts B T} and B _{C on} the outer circumference of the forming roll R _T.

Base paper W, the wire belt B _T to be conveyed, since the papermaking from the slurry as it is carried on B _C, forming an orientation in which the pulp is along the conveying direction. Therefore, the base paper W has a directivity of tear strength that is difficult to tear along the width direction and easy to tear along the longitudinal direction.
Base paper W is the delivery wire belt B _C, is conveyed to the next press part 12.

<Press part>
The press part 12, the conveying belt B _A water-absorbent is provided wound on a belt conveyor roll. For the transport belt B _A , an endless belt made of a water-absorbent material (for example, felt) is used.
The upstream portion of the transport belt B _A is provided in a state of being urged with respect to the base paper W transported by the transport wire belt B _{C described above.}

Of the belt transport rolls, the roll at the portion where the base paper W is urged to the transport wire belt B _C is provided with a suction roll _{RA having a suction mechanism M S for sucking the base paper W.} The suction roll _RA switches the transport path of the base paper W from the transport wire belt B _C to the transport belt B _A.
Moisture is squeezed from the base paper W at the urging point on the transport wire belt B _{C sandwiching the base paper W.} The base paper W dehydrated in this way is conveyed to the next dryer part 13 by the _{conveying belt B A.}

<Dryer part>
_{The dryer part 13 is provided with a drying roll RD} (also referred to as a “Yankee roll”) for drying the base paper W.
On the drying roll R _D , a portion of the transport belt B _{A on} the downstream side is urged via the base paper W. The base paper W transported by the transport belt B _A shifts so as to stick to the outer peripheral surface _{of the rotating drying roll R D.} In the drying roll _RD , for example, the cylinder surface is heated by the steam introduced into the cylinder, and the base paper W on the cylinder surface is dried.

The dryer part 13 is provided with a doctor blade D _{D for} peeling the dried base paper W from the drying roll R _D. The doctor blade D _D is arranged in a posture in which the cutting edge is abutted against the tubular surface of the drying roll R _D. The doctor blade D _D imparts crepe (crepe-like wrinkles) to the base paper W peeled from the drying roll R _{D.
The base paper W peeled off from the drying roll RD} in this way is conveyed to the next calendar part 14.

<Calendar part>
The calendar part 14 is provided with a _{pair of calendar rolls RL.} The calendar rolls _RL rotate at a speed corresponding to the transport speed of the base paper W, and are arranged so as to face each other with the base paper W to be transported sandwiched. The base paper W is pressure-welded in the thickness direction between the calendar rolls R and _{L to be smoothed.}
The base paper W calendered in this way is conveyed to the next first winding part 15.

<First volume part>
The first volume preparative Part 15, the roll R _W1 preparative first volume for taking up the sheet W is provided. The first original fabric roll W _R1 is wound band-shaped sheet W is produced on the roll R _W1 preparative first volume.
In the following description, for the Ichihara roll W _R1 of the semi-finished product (intermediate), in order to prevent confusion with the roll forming apparatus structure, "the Ichihara roll W _R1" and "first raw W _R1 Is abbreviated.

[1-2. Laminating machine]
The configuration of the laminating machine 3 will be described in detail with reference to FIG.
The laminating machine 3 is a ply machine that superimposes base papers W on each other. In laminating machine 3, two first raw W _R1, W _R1 is installed, if the base paper W paid out from the first raw W _R1, W _R1 and is laminated. In this way, a base paper set WP having a two-layer structure is manufactured from the two base papers W.

The laminate unit 3, the upstream transport part P ₂₀ described above, the first feeding part 30, calender part 33, Karikakarigo part 34, in addition to the upstream cutting part 36 and the second volume collected by Part 38, superposed and if sheet W A stacking part 32 is provided.
Here, the calendar part 33 is set on the downstream side of the laminated part 32, and the temporary engagement part 34 is set on the downstream side of the calendar part 33. Further, an upstream cutting part 36 is set on the downstream side of the temporary engagement part 34.
Hereinafter, each part 30, 32, 33, 34, 36, 38 of the laminating machine 3 will be described in the order of manufacturing processes.

<First delivery part>
In the first feeding part 30, the first feed roll R _U1 that the installed two first raw W _R1, R _U1 is provided in each of the base paper from a first raw W _R1 of the first feed roll R _U1 W is paid out.
The base paper W unwound in this way is conveyed to the next laminated part 32.

<Laminated part>
The laminate part 32, laminating roll R _P is provided with two sheet W is wound by superimposing a part of the outer periphery. Two base papers W are superposed on the laminated roll R _P.
For the base paper set WP stacked in this way, one of the two outward facing sides (main side) is the first side F ₁ (the front side F _F of one base paper W), and the other side is the second side. Let it be F _{2 (the front side F F} of the other base paper W). In other words, the base papers W having the back surfaces F and _B facing each other are superposed on each other, and the base paper set WP is laminated from the two base papers W.
The base paper set WP laminated as described above is transported to the next calendar part 33.

<Calendar part>
In the calendar part 33, similarly to the calendar part 14 of the paper machine 1, the base paper assembly WP is pressed and smoothed in the thickness direction. Two sets of calendar rolls R _L1 and R _L2 are provided in the calendar part 33, and the base paper set WP is subjected to the calendar treatment in two stages.
The base paper assembly WP thus calendared is conveyed to the next temporary engagement part 34.

<Temporary engagement part>
The Karikakarigo part 34, engaging the roll R _C0 engaging a portion of the base paper sets WP in the thickness direction is provided. The engaging roll R _C0 is provided with a convex roll R _C01 and a receiving roll R _C02. A convex portion is provided on the outer circumference of the convex roll R _C01 , and this convex portion is abutted against the outer circumference of the _{receiving roll R C02 to be received.} The convex roll R _C01 and the receiving roll R _C02 rotate at a speed corresponding to the transport speed of the base paper set WP, and are arranged so as to face each other with the base paper set WP interposed therebetween.

When the convex portion of the convex roll R _{C01 is abutted against the outer circumference of the receiving roll R C02} via the base paper set WP, the base paper set WP is in a state of being entangled in the thickness direction. In other words, the two layers of the base paper set WP are in a state of being bitten into each other, and the layers of the two-layer structure are integrally engaged with each other.
The outer circumference of the receiving roll R _C02 is made of metal, and a structure is adopted in which _{the convex portion of the convex roll R C01 does not easily protrude toward the receiving roll R C02 with} respect to the base paper assembly WP. Therefore, engaging the treated base paper sets WP in Karikakarigo part 34, convex roll R _C01 side part (e.g. linear portions along the conveying direction) is recessed, substantially flat receiving roll R _C02 side Make a shape. Such an engaging structure is also called "crimp" or "contactor embossing", and is structurally different from the embossing having irregularities on both sides, which is used for kitchen paper and toilet rolls.

The temporary engagement part 34 has different "engagement regions" and "engagement timings" with respect to the main engagement part 53 of the folding machine 5, which will be described in detail later.
The engagement region can be set at any position in the temporary engagement part 34, whereas in the main engagement part 53, it is set on the edge of the product that has become tissue paper (hereinafter abbreviated as "tish product"). It is set in the corresponding predetermined place.

Regarding the engagement timing, the temporary engagement part 34 temporarily engages the base papers W with each other, whereas the main engagement part 53 always engages the base papers W with each other.
Speaking in detail, the Karikakarigo part 34, only the sheet W, which forms the base paper sets WP to be wound on the outer periphery of the second volume collected by part 38 in the second original fabric roll W _R2 of laminator 3 (roll) with each other Engage. That is, the engagement by the temporary engagement part 34 is carried out only from immediately before the end of the winding of the base paper set WP to the end. Conversely, when the base paper set WP has just begun to be wound or when there is a margin before the end of winding, the base paper W is not engaged with each other by the temporary engagement part 34.

In addition, the temporary engagement part 34 may have a different "visibility of the engagement pattern" from the main engagement part 53 of the folding machine 5, which will be described later. Specifically, the temporary engagement part 34 may engage the base papers W forming the base paper assembly WP with a pattern having higher visibility than the main engagement part 53. That is, the temporary pattern may be set to have higher visibility than the main pattern.
The "pattern" here is not limited to a pattern in a narrow sense such as a pattern or a pattern, but is not limited to a region in which the base papers W are engaged with each other (for example, an area in which a pattern or a pattern is attached) or a depth in which the base papers W are engaged with each other (thickness direction). It means a pattern in a broad sense including (dimensions of).

Examples of the tentative pattern include the following pattern examples 1 to 3.
-Pattern example 1: Temporary pattern in which a wider range than this pattern is engaged-Pattern example 2: Temporary pattern engaged in a pattern or pattern that is more prominent than this pattern-Pattern example 3: Engagement depth than this pattern Temporary pattern with a large size The base paper set WP that has been temporarily engaged as described above is conveyed to the next upstream cutting part 36.

<Upstream cutting part>
The upstream cutting part 36, a slitter S _U cutting the sheet set WP in the longitudinal direction is provided. Slitter S _U can cut the sheet set WP in various widthwise dimension corresponding to a widthwise position of the bite. For example, the width direction position relative to the base paper sets WP is adjustable so provided blade (cutter) and blade receiving roll provided slitter S _U.

In the upstream cutting part 36, the cutting dimension of the base paper set WP is set to a predetermined width direction dimension.
The "predetermined width direction dimension" means the width direction dimension of the base paper assembly WP installed in the folding machine 5 (see FIG. 4).
In the present embodiment, since the downstream cutting part 54 is set in addition to the upstream cutting part 36, the cutting dimension of the base paper set WP by the upstream cutting part 36 is the edge (long side or short side) of the tissue product. The dimension is set to an integral multiple of the dimension (hereinafter referred to as "standard width dimension"). In this upstream cutting part 36, the base paper set WP is cut with a size of 2 to 10 times the standard width dimension, and the base paper set WP is cut into two base paper set WPs.
Each base paper set WP cut as described above is transported to the next second winding part 38.

<Second winding part>
The second volume collected by part 38, similarly to the first volume preparative Part 15, the roll R _W2 preparative second volume for taking up the sheet set WP is provided. The second bulk roll W _R2 is produced on the roll R _W2 preparative second volume is wound band-shaped sheet sets WP. Here, also for the second original fabric roll W _R2, in order to prevent confusion with the roll forming apparatus structure, abbreviated as "second raw W _R2".
In the second volume collected by part 38, a plurality of second original fabric W _R2 is coaxially these second raw W _R2 is wound concentrically.

[1-3. Folding machine]
The configuration of the folding machine 5 will be described in detail with reference to FIG.
The folding machine 5 is an interfolder for folding the base paper set WP. The folding machine 5 employs a so-called multi-stand type interfolder (also referred to as a "multi-unit machine"), which corresponds to the number of sheets packaged in the product state (the number of sheets stored in the tissue box). A large number of second original W _R2 are installed.

The folding machine 5, downstream transport part P ₃₀ described above, the second feeding part 50, in addition to the engaging part 53 and the downstream cut part 54, folding parts 56 to fold the sheet set WP, folded sheet set A division part 57 for dividing the WP and a packaging part 58 for the divided base paper set WP are provided.
The folding machine 5 is also provided with two types of guide parts 51 and 52 for guiding the transportation of the base paper set WP. One, the direction is varied in the unloading direction D _O the conveying direction of the second feeding part 50 at a second original fabric W sheet sets WP fed from _R2 from the loading direction D _I, for guiding the conveyance of the sheet set WP Guide Part 51. The other one, while crimping the second feeding part 50 at a second original fabric W sheet sets WP fed from _R2 in the thickness direction, a spelling guide part 52 for guiding the conveyance of the sheet set WP.

Here, the direction guide part 51 is set on the downstream side of the second feeding part 50, and the binding guide part 52 is set on the downstream side of the direction guide part 51. Further, the main engaging part 53 is set on the downstream side of the binding guide part 52, and the downstream cutting part 54 is set on the downstream side of the main engaging part 53. A folding part 56 is set on the downstream side of the downstream cutting part 54.

Two second original _WR2s are installed (for example, side by side) in one second feeding part 50, and two sets from one second feeding part 50 _{in which two second originals WR2 are installed.} Tish paper is manufactured. That is, half of the total number of sets of tissue paper (a box of tissue paper) packaged in the product state and the same number of second feeding parts 50 are installed.
The guide parts 51 and 52, the main engaging part 53, the downstream cutting part 54, and the folding part 56 are provided in many places as in the second feeding part 50. On the other hand, the dividing part 57 and the packaging part 58 are provided at one place downstream of the folding machine 5.

In addition, the base paper set WP is stripped from the outer peripheral edge of _{the second raw fabric WR 2} as a preparation before feeding the base paper set WP in the second feeding part 50. For example, by the base paper sets WP from the outer peripheral edge of the manual second original fabric W _R2 by the operator stripped, dirt and scratches removed from the laminator 3 can be attached to during transportation and installation of the folding machine 5 This ensures the quality of Tish products.
Hereinafter, each part 50, 51, 52, 53, 54, 56, 57, 58 of the folding machine 5 will be described in the order of manufacturing processes.
The upstream parts 50, 51, 52, 53, 54, 56 will be described in detail with reference to FIG. 4 (A), and the downstream parts 56, 57, 58 will be described in detail with reference to FIG. 4 (B).

<Second delivery part>
In the second feeding part 50, the second feed roll R _U2 of the second original fabric W _R2 is installed is provided, the base paper sets WP is fed from the second raw W _R2 of the second feed roll R _U2.
The base paper set WP drawn out in this way is conveyed to the next direction guide part 51.

<Direction guide part>
The directional guide part 51 is provided with _{a directional guide roll R E} that changes the transport direction of the base paper assembly WP. Conveying direction of the sheet set WP is transported in the direction the guide roll R _E is carried direction D _I. On the other hand, the transport direction of the base paper set WP carried out from the _{direction guide roll R E is the carry-out direction D O.}

Out direction D _O is constant regardless of the winding diameter of the second original fabric W _R2 (thickness in the radial direction). In contrast, as the winding diameter of the second original fabric W _R2 with the feeding of the sheet set WP becomes smaller, carrying direction D _I changes.
Here, as illustrated by the solid line in FIG. 4 (A), carrying direction D _I of the base paper sets WP fed from the second raw W _R2 of the large diameter is obliquely downward. The carrying direction D _I, the second original fabric W _R2 becomes small as the base paper sets WP is fed out, as illustrated by the two-dot chain line in FIG. 4 (A), the inclination angle with respect to the horizontal direction is reduced. The carry-out direction _DO is set in a direction slightly inclined with respect to the vertical direction.

The angle formed by the above two directions D _I and D _O is limited to an acute angle depending on the location of the directional guide roll R _{E. In other words, the directional guide roll R E} is arranged at a position that limits the angle formed by the carry-in direction D _I and the carry-out direction D _{O to an acute angle.} Here, the directional guide roll R _E is arranged below the second feeding roll R _{U2 in which the second original roll W R2 is installed.}
The base paper set WP guided in this way is conveyed to the next binding guide part 52.

<Binding guide part>
The spelling guide part 52 is provided with a pair of spelling rolls R _B. Spelling roll R _B is rotated at a speed corresponding to the downstream transport speed V _D, they are arranged opposite to each other in a state sandwiched sheet sets WP is transported. The binding state of the base paper W forming the base paper assembly WP between the binding rolls R _{B in the thickness direction is maintained.}
The base paper set WP in which the binding state of the base papers W is maintained in this way is conveyed to the next main engaging part 53.

<This engagement part>
This engaging part 53, like the temporary engagement parts 34 of the laminating machine 3, the engaging roll R _C engaging a portion of the base paper sets WP in the thickness direction is provided, constituting the engaging roll R _C The convex rolls R _C1 and the receiving rolls R _C2 engage the base papers W forming the base paper set WP with each other.
As described above, the main engaging part 53 engages the base papers W forming the base paper set WP at predetermined positions corresponding to the edge edges of the tissue products. In this way, so-called "edge embossing" is formed on the base paper set WP.
The base paper set WP that has been subjected to the main engagement process as described above is conveyed to the next downstream cutting part 54.

<Downstream cutting part>
The downstream cutting part 54 is provided with _{a slitter SD} that cuts the base paper assembly WP along the longitudinal direction, similarly to the upstream cutting part 36 of the laminating machine 3. In this downstream cutting part 54, the base paper set WP is cut with the standard width dimension.
The base paper set WP that has been cut as described above is transported to the next folding part 56.

<Folding part>
In the folding part 56, a mechanism for folding the base paper set WP using the folding plate P as a folding mechanism (folding plate type, the folding form of the base paper set WP is a pop-up method) is adopted. The folding part 56 is provided with a folding plate P for folding the base paper set WP and various transport rolls.
In the folding part 56, the _{base paper assembly WP is folded with the first surface F 1} on the outside and the second surface F ₂ on the inside, and the creases made by the folded plate P are made along the transport direction of the base paper assembly WP. To form.
The base paper set WP folded in this way is different from the other base paper set WP folded through the other second feeding parts 50, guide parts 51, 52, main engaging part 53, and downstream cutting part 54 arranged side by side. stacked, the conveying belt B _I, is conveyed to the next cutting part 57.

<Division part>
The dividing part 57 is provided with a cutter C for cutting the base paper set WP along the width direction. The base paper set WP cut in this way is continuously divided in the longitudinal direction.
The cutter C can cut the base paper assembly WP into various transport direction dimensions according to the cutting timing (here, the control interval for vertical movement). For example, the longer the cutting interval of the cutter C, the longer the distance that the base paper set WP is conveyed after cutting, so that the base paper set WP having a long transport direction dimension can be separated.

The division dimension of the base paper set WP is set to a predetermined transport direction dimension.
The "predetermined transport direction dimension" means the dimension of the end edge of the finished tissue paper that is orthogonal to the end edge cut to the above-mentioned standard width dimension. Specifically, in the tissue paper, the dimension set as the length of the end side along the longitudinal direction of the tissue box is set to the predetermined transport direction dimension.
The sheet-fed base paper set WP divided by the dividing part 57 in this way is the tissue paper before packaging and is transported to the next packaging part 58.

<Packaging part>
In the packaging part 58, the base paper set WP divided by the division part 57 is housed in a carton 59 (tish box) for packaging.
When the packaging is completed in this way, the boxed tissue paper is completed.

[2. Composition of tissue manufacturing method]
Next, a method for producing tissue paper using the above-mentioned apparatus will be described.
In this tissue manufacturing method, in the various parts described above in the configuration of the tissue manufacturing apparatus, a process in which "part" is replaced with "process" in the name is carried out. For example, the second part P ₂ of the laminated part 32 is implemented step of laminating the second step, the third part P ₃ of the folding part 56 folding process of the third step is performed.
Hereinafter, each step of the tissue manufacturing method will be described step by step with reference to FIG.

In this method, first, the first steps (steps S10 and S15) corresponding to the manufacturing method of the paper machine 1 are carried out. Then, the first transportation step for transporting the first raw W _R1 taken up by the paper machine 1 to laminator 3 (step S20) is performed.
After that, the second step (steps S30 to S38) corresponding to the manufacturing method of the laminating machine 3 is carried out. Then, the second transportation process for transporting the second original fabric W _R2 taken up by the laminating machine 3 to the folding machine 5 (step S40) is performed.
Then, the third step (steps S50 to S58) corresponding to the manufacturing method of the folding machine 5 is carried out.

In the first step, a papermaking step (step S10) corresponding to the manufacturing method of the papermaking part 10 is carried out. In this papermaking process, the wet base paper W is dried from the raw material slurry to produce the dry base paper W.
Then, the first winding step (step S15) of winding the base paper W in the first winding part 15 is carried out.

In the second step, the upstream transport step of transporting _{the base paper W and WP at the upstream transport speed V U} from the feeding of the base paper W in the first feeding part 30 to the winding of the base paper set WP in the second winding part 20 ( Steps S30 to S38) are carried out.
In this second step, the first feeding step (step S30) of feeding the base paper W in the first feeding part 30 is carried out. Subsequently, the back surface F _B if stacking step of mutually superimposed base paper W so as to face the (step S32) is performed in the stacking part 32.

Then, a calendar step (step S33) of pressing and smoothing the base paper assembly WP in the calendar part 33 is performed.
After that, a temporary engagement step (step S34) is carried out in which the base papers W forming the base paper assembly WP are engaged with each other at an arbitrary position in the temporary engagement part 34. The temporary engagement step causes only engaged with one another sheet W constituting the base paper sets WP to be wound on the outer peripheral edge of the second original fabric W _R2. That is, the temporary engagement step is not always carried out, but is carried out temporarily.

Then, in the upstream cutting part 36, an upstream cutting step (step S36) of cutting the base paper assembly WP to a predetermined width direction dimension is carried out. Here, the base paper set WP is cut in two with dimensions that are 2 to 10 times the standard width dimension.
Then, the second volume preparative step winds the base paper sets WP Part 20 preparative second volume to the second original fabric W _R2 (step S38, the winding process) is performed. In this second winding step, a plurality of coaxially arranged second original fabrics _WR2 are wound.

In the third step, to the base paper W that it has been folded in divided part 57 from feeding the raw paper sets WP in the second feeding part 50 is divided in a predetermined conveying direction dimension, conveying the sheet set WP downstream transport speed V _D Downstream transfer steps (steps S50 to S56) are carried out.
In the third step of this embodiment, prior to feeding the sheet set WP in the second feeding part 50, peeling process of stripping the sheet set WP from the outer peripheral edge of the second original fabric W _R2 (step S48) is also performed Will be done.

In this third step, the second feeding step (step S50, feeding step) of feeding the base paper W in the second feeding part 50 is carried out. Thereafter, the direction guide step for guiding by changing the conveying direction in the direction guide rolls R _E from the loading direction D _I to unloading direction D _O conveyance of sheet sets WP (Step S51) is performed. Then, spelling guide step for guiding the conveyance of the sheet set WP with crimped in the thickness direction in spelling roll R _B (step S52) is performed.
After that, the main engagement step (step S53) is carried out in which the base papers W forming the base paper assembly WP are engaged with each other at a predetermined position corresponding to the edge of the tissue product in the main engagement part 53. Then, in the downstream cutting part 54, a downstream cutting step (step S54) of cutting the base paper set WP to the standard width dimension is carried out.

Subsequently, a folding step (step S56) of folding the base paper assembly WP in the folding part 56 is performed.
After that, a dividing step (step S57) of cutting the base paper assembly WP folded in the folding part 57 into predetermined transport direction dimensions and dividing the base paper assembly WP is performed.
Then, in the wrapping part 58, a wrapping step (step S58) of wrapping the base paper set WP (tish paper) in the carton 59 is carried out.
Tish paper is manufactured by such a procedure.

[3. Action and effect]
Since the tissue manufacturing method disclosed in the present embodiment is configured as described above, the following actions and effects can be obtained.
Hereinafter, the actions and effects related to each step will be described in detail in the order of the engaging step, the cutting step, and the other steps.

[3-1. Engagement process]
First, the actions and effects related to the engagement process will be described.
(1) According to this manufacturing method, since the base paper set WP in which the base papers W are engaged with each other in the temporary engagement step is unwound in the second unwinding step after the second winding step, the unfolded base paper set WP is formed. It is possible to suppress the positional deviation between the base papers W in the thickness direction and the width direction. It is possible to suppress the occurrence of wrinkles and twists due to this misalignment.
Therefore, the quality of the produced tissue paper can be improved.

(2) Since the base paper assembly WP cut in the cutting process may change the frictional force and tension due to the decrease in the width direction dimension, the above-mentioned speed fluctuation, the route to be conveyed, and the position of the base paper W are used. Various conditions may become unstable.
On the other hand, a temporary engagement process is set on the upstream side of the upstream cutting process, and the base papers W forming the base paper set WP before being cut in the upstream cutting process are engaged with each other. Similarly, the main engagement step is set on the upstream side of the downstream cutting step, and the base papers W of the base paper set WP before being cut in the downstream cutting step are engaged with each other. From this, the base paper set WP can be cut in a stable state.

(3) By the way, the base paper W if and is base paper sets WP that is superimposed is stable when initially fed from the second raw W _R2 in the second feeding step to transport the sheet set WP that unstable feeding is progress Tend to do.
Sheet sets WP Introduction fed above corresponds to the base paper sets WP wound up on the outer peripheral edge of the second original fabric W _R2, only the base paper W is tentatively retaining constituting the base paper sets WP to be wound into the outer peripheral edge They are engaged with each other in the process. For this reason, the engagement between the base papers W, which contributes to stable transportation, is temporarily attached by the temporary engagement step. Therefore, the base paper sets WP to be implemented only in a required timing engagement to stably transport, contributing to the life of the engaging roll R _C0 implementing Karikakarigo process.

While the engagement between the base papers W, which is necessary as a function of the tissue product, is always carried out in the main engagement process, the preferable engagement in manufacturing the tissue paper as described above is temporary in the temporary engagement process. Will be implemented in. Therefore, the engagement with the base paper assembly WP, which is a tissue product, by the temporary engagement process can be suppressed, and unnecessary engagement as a product function can be suppressed. Furthermore, it is possible to suppress problems such as holes being opened (damaged) by overlapping and engaging the base papers W.

(4) Since the engaged sheet sets WP is rotated second original fabric W _R2 wound with Karikakarigo part 34, or a combination of the base paper sets WP is correct sheet W unwinding from the second original fabric W _R2 not It is possible to reduce the load on the confirmation work (that is, whether or not the base paper is a base paper set WP composed of the base paper W stacked by the laminating machine 3). Further, if the base papers W forming the base paper set WP are engaged with each other in a pattern in which the temporary engagement part 34 has a higher visibility than the main engagement part 53, it is visually confirmed whether or not the base paper set WP to be fed out is the correct combination. Can be confirmed in. From these, it contributes to the appropriate operation by the operator to prepare the feeding of the sheet set WP from the second raw W _R2.

(5) Since the base papers W to be engaged in the temporary engagement process are pressed and smoothed in the calendar process, the engagement quality in the temporary engagement process can be improved. For example, it is difficult for a base paper set in which fluffy base papers are overlapped to engage with each other. On the other hand, the base paper set WP in which fluffing is suppressed in the calendar process can satisfactorily engage the base paper Ws with each other.

[3-2. Cutting process]
Next, the actions and effects related to the cutting process will be described.
(1) Since the base paper assembly WP is cut in two stages by the upstream cutting process and the downstream cutting process, the width direction dimension of the base paper assembly WP before and after cutting is reduced as compared with the manufacturing method in which the base paper assembly WP is cut in only one step. It can be suppressed. Therefore, it is possible to suppress relative speed fluctuations between base paper sets WPs that are independent in the width direction. As a result, it is possible to prevent wrinkles and twists from occurring in the base paper set WP after cutting.
Therefore, the quality of the produced tissue paper can be improved.
(2) In the second volume preparative step, since the shredded sheet sets WP is wound as a second original fabric W _R2 a plurality of coaxially disposed, Ya winding shaft of the plurality of second original fabric W _R2 The winding power can be standardized. Therefore, it contributes to the simplification of the device cost and the control configuration.

(3) In addition, each of the base paper sets WP which is cut in two by the upstream cutting part 36 is wound on the second original fabric W _R2 coaxial as described above. Therefore, two second original fabric W _R2, each wound of shredded sheet set WP, each axial end surface is visible. Therefore, for both of the second original fabric W _R2, it can be inspected visually the state of the sheet set WP from the axial end face.
If the second original fabric W _R2 wrinkles and twisting occurs in the base paper sets WP after cutting, the problem by the visual inspection is found the operator can further avoid the use of downstream processes. Thus, the manufacture of tissue products using the second original fabric W _R2 with wrinkles or twisting can be prevented.

(4) In addition, since the base paper set WP is cut with a size of 2 to 10 times the standard width dimension in the upstream cutting process, the contact area between the base paper Ws in the base paper set WP on the downstream side of the upstream cutting process is determined. Can be secured. This contributes to the position shift between the base papers W in the base paper set WP and the suppression of wrinkles and twists due to the position shift.

[3-3. Other processes]
Finally, the actions and effects related to other steps will be described.
_{(1) The downstream transfer speed V D} of the downstream transfer process of the folding machine 5 _{is slower than the upstream transfer speed V U} of the upstream transfer process of the laminating machine 3, and the transfer speed is relatively low. This engagement process is set on the folding machine 5. From this, it is possible to reliably engage the base papers W in this engagement step, and it is possible to improve the engagement quality between the sheet papers forming the tissue product.

(2) direction in the guide step from the loading direction D _I by changing the discharge direction D _O since the transport of the sheet set WP is guided, the tension applied to the base paper sets WP unwound in folding machine 5 is held Easy to be done. Therefore, it is possible to suppress the positional deviation between the base papers W forming the base paper set WP, and it is also possible to suppress the occurrence of wrinkles and twists.
In this way, the folding machine 5 can stably convey the base paper assembly WP.

(3) Further, since the transport of the base paper set WP is guided while being crimped in the thickness direction in the binding guide step, it is possible to suppress the misalignment of the base paper W forming the base paper set WP. From this point as well, the folding machine 5 can stably convey the base paper set WP.
In addition, since the binding guide process is set on the upstream side of the main engagement process, the positions of the base papers W are displaced from each other with respect to the base paper assembly WP before the base papers W are engaged with each other in the main engagement process. It can be suppressed. For example, even if the feeding from the second raw W _R2 progress to the temporary engagement process fiberboard sets WP not engaged in is fed, it is possible to suppress the positional deviation of to what sheet W in spelling guide step ..

[II. Modification example]
The above-described embodiment is merely an example, and there is no intention of excluding the application of various modifications and techniques not specified in this embodiment. Each configuration of the present embodiment can be variously modified and implemented without departing from the gist thereof. In addition, it can be selected as needed and can be combined as appropriate.

For example, a part for applying a chemical may be added to a base paper or the like. Examples of this drug include various liquids such as moisturizers and fragrances, medical ingredients, refreshing agents, and pigments. As the moisturizer, a moisturizer in which glycerin or sorbitol is dissolved can be used.
The above coating part (coating step) can be set at any position in the laminating machine or the folding machine. As the coating method by the coating part, a known method such as a gravure method or a roll coating method can be adopted.

Further, as shown in FIG. 6, a rotary type interfolder may be used for the folding machine 5'. In this folding machine 5', a set of base paper sets WP'and WP' are folded and stacked to form creases along the width direction of the base paper set WP'. According to the folding machine 5'in which a set of base paper sets WP'and WP' is installed in this way, the folding machine 5'is more than the folding part (folding process) as compared with the above-mentioned multi-stand type folding machine 5. The number of installations (number of processes) of each part (each process) on the upstream side can be suppressed. Therefore, the device cost and the device installation cost can be reduced.

Alternatively, the upstream cutting part (cutting process) is not limited to two, and the base paper set may be cut into three. In this case, each of the three-cut base paper sets is wound around a coaxial second raw fabric. Of these three second raw fabrics, the two axial end faces of the width direction ends are visible. Therefore, the state of the two second raw fabrics can be visually inspected.
In addition, the temporary engagement part (temporary engagement step) is not limited to a form in which one surface is substantially flat, and the base papers may be engaged with each other in a form having irregularities on both sides. By molding such embossing into a base paper set, the visibility of the temporary pattern can be improved.
Other methods such as a long net type and a circular net type may be used for the wire part, and a multi-cylinder type (cylinder dryer) roll may be used for the dryer part.

1 Paper machine 3 Laminating machine 5,5'Folding machine 10 Paper making part 15 First winding part 30 First feeding part 32 Laminating part 33 Calender part 34 Temporary engagement part 36 Upstream cutting part 38 Second winding part 50th 2 Feeding part 51 Direction guide part 52 Binding guide part 53 Engagement part 54 Downstream cutting part 56 Folding part 57 Dividing part 58 Packaging part 59 Carton C Cutter _DD Doctor blade F _F Front surface F _B Back surface F ₁ First Surface F ₂ Second surface P ₁ First part P ₂ Second part P ₃ Third part P ₁₂ First transportation part P ₂₃ Second transportation part _RC , _{RC 0} Engagement roll R _D Drying roll _RE Direction guide roll R _P laminating roll R _T forming roll R _U1, R _U2 feed roll R _W1, R _W2 winding roll S _U, S _D slitter W, W 'base paper (papermaking product)
W _R1 1st original roll
W _R2 Second original roll

Claims (13)

The winding process of winding a base paper set in which multiple strips of base paper are stacked on top of each other on a roll,
A feeding step of feeding out the base paper set of the roll wound in the winding step, and a feeding step.
A cutting step of cutting the base paper set along the longitudinal direction of the base paper set, and
The base paper set includes an engagement step of engaging the base papers with each other.
The cutting process is
An upstream cutting process for cutting the base paper assembly on the upstream side of the winding process,
On the downstream side of the feeding step, there is a downstream cutting step of further cutting the base paper set cut in the upstream cutting step.
The engagement step is
A temporary engagement step of engaging the base papers forming the base paper assembly at an arbitrary position on the upstream side of the winding step,
A tissue manufacturing method comprising a main engaging step of engaging the base papers forming the base paper set at a predetermined position corresponding to an edge of a tissue product on the downstream side of the feeding step. The tissue manufacturing method according to claim 1, wherein the temporary engagement step engages the base papers forming the base paper set before being cut in the upstream cutting step. The tissue production according to claim 1 or 2, wherein the temporary engagement step engages only the base papers forming the base paper set wound around the outer peripheral edge of the roll in the winding step. Method. The tissue manufacturing method according to any one of claims 1 to 3, wherein the temporary engagement step engages the base papers with each other in a pattern having higher visibility than the main engagement step. The tissue manufacturing method according to any one of claims 1 to 4, wherein a calendar step of pressing and smoothing the base paper assembly is provided on the upstream side of the temporary engagement step. The tissue production according to any one of claims 1 to 5, wherein the main engaging step engages the base papers forming the base paper set before being cut in the downstream cutting step. Method. The winding step is described in any one of claims 1 to 6, wherein each of the base paper sets cut in the upstream cutting step is wound on a plurality of the rolls arranged coaxially. Tish manufacturing method. The tissue manufacturing method according to claim 7, wherein the upstream cutting step cuts the base paper set into two or three pieces. The tissue according to any one of claims 1 to 8, wherein the upstream cutting step cuts the base paper set in a size 2 to 10 times the standard width dimension of the tissue product. Production method. An upstream transfer step of transporting the base paper assembly of the winding step, the temporary engagement step, and the upstream cutting step at an upstream transport speed,
10. The tissue manufacturing method according to any one item. A direction guide step for guiding the transport of the base paper set by changing the transport direction of the base paper set fed from the roll in the feed-out step from the carry-in direction to the carry-out direction is provided.
The tissue manufacturing method according to any one of claims 1 to 10, wherein the direction guide step is limited to an acute angle between the carry-in direction and the carry-out direction. The tissue manufacturing according to any one of claims 1 to 11, wherein a binding guide step for guiding transport while crimping the base paper assembly in the thickness direction is provided on the downstream side of the feeding step. Method. The tissue manufacturing method according to claim 12, wherein the binding guide step is set on the upstream side of the main engaging step.

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