TWI634876B - Absorber manufacturing apparatus and method of manufacturing same - Google Patents

Abstract

The manufacturing apparatus (10) of the absorbent body (3) of the present invention has: a rotating cylinder (2) having a collecting recess (22) on the outer peripheral surface (21); and a duct (4) for scattering the shaped body material State supply. Inside the duct (4), in the space (4S) partitioned by the hanging plate (43), a scraper roller (42) for scraping the formed material of the fiber piled up, and a duct opening for sucking the outside atmosphere to the downstream side are disposed. Department (44). The inside of the pipe (4) is divided into a fiber accumulation region PT and a fiber re-distribution region RPT by the hanging plate (43), and the fiber accumulation region PT is on the upstream side of the lower plate (43), and the formed body in a scattered state is formed. The material is excessively accumulated in a manner such that the self-concentrating recess (22) overflows, and the fiber re-depositing region RPT is on the downstream side of the lowering plate (43), and the excessive amount of the fiber-stacked material is scraped by the scraping roller (42). The bulk material is formed and the fibers are re-stacked.

Description

Absorber manufacturing apparatus and method of manufacturing same

The present invention relates to an apparatus for manufacturing an absorbent body.

As an absorbent body used for an absorbent article such as a disposable diaper, a menstrual sanitary napkin, or an incontinence pad, there is an absorbent body having a high portion in the center portion for increasing the wearing feeling or leakproofness. The situation. For example, in Patent Document 1 to 2, a method of using a fiber stacking device including a deeper middle and high portion recess in an accumulation concave portion on an outer peripheral surface is disclosed in Patent Document 1 to 2, for example. Rotating cylinder.

Patent Document 1 discloses a fiber stacking device that supplies a fiber material to a peripheral surface of a rotating cylinder in a scattering state by using a pipe, and scrapes excess of the collecting recessed portion of the rotating drum by a scraper disposed on the downstream side. In part, the scraped fiber material is again supplied to the upstream side of the pipe via a different conveying path than the pipe. According to the fiber stacking device described in Patent Document 1, the excess portion of the overflowed fibrous material can be reused, so that fiber accumulation can be efficiently performed.

Further, Patent Document 2 discloses a two-stage fiber stacking device in which a fiber material is supplied from a first pipe at a position on the upstream side of the fiber stacking drum, and the fiber is scraped off by a scraping roller to be deposited in the collecting recess. The fiber material other than the fiber material of the recessed portion is supplied to the fiber material of the middle and high portion recessed portion by the second duct at a position on the downstream side of the fiber stacking drum, and the fiber is accumulated in the aggregate. Use a recess.

Further, Patent Document 3 discloses a fiber stacking device which includes a pair of collecting plates at a position on the upstream side of the fiber stacking drum, and can be adjusted to be disposed in the fiber stack by adjusting the angles of the pair of collecting plates. The weight per unit area of the fiber material supplied from the upper portion of the concave portion in the outer peripheral surface of the cylinder.

Prior technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open Publication No. 2010-35701

Patent Document 2: Japanese Patent Laid-Open Publication No. 2006-500155

Patent Document 3: Japanese Patent Laid-Open Publication No. 2007-260297

However, Patent Document 1 does not describe any aspect in which the fiber material scraped off by the doctor roll is easily peeled off from the projection of the doctor roll. Further, in the rotating drum of the fiber stacking device described in Patent Document 1, the scraped fiber material is again supplied to the upstream side of the pipe via a conveying path different from the pipe. Therefore, there is a case where the suction force of the rotary cylinder is lowered as the thickness of the pulp deposition increases, and the outer surface of the fiber accumulation portion corresponding to the upper portion of the concave portion in the accumulation concave portion is different from the concave portion for the middle and high portion. The outer surface of the fiber accumulation portion corresponding to the concave portion for gathering is further recessed, and there is a case where it is difficult to manufacture an absorbent body including a high portion among the desired basis weights.

Further, in the rotary drum of the fiber stacking device described in Patent Document 1, since the suction force of the rotary cylinder is lowered as the thickness of the pulp deposit increases, there is a case where the concave portion corresponding to the high portion in the concave portion for accumulation is corresponding. The outer surface of the fiber-receiving portion is in a state of being more recessed than the outer surface of the fiber-receiving portion corresponding to the recess for collecting other than the recess portion for the middle-high portion, and it is difficult to manufacture an absorber including a high portion among the desired basis weights.

Further, in Patent Document 2, there is no description as to the fact that the fibrous material scraped off by the doctor roll is easily peeled off from the projection of the doctor roll. Further, in the fiber stacking device described in Patent Document 2, the fiber material fibers are first deposited in the middle and high portion recesses, and then The fiber material fibers are deposited in the collecting recesses other than the recesses for the middle and high portions, so that the suction force of the rotating drum decreases as the thickness of the pulp pile increases. Therefore, in the same manner as the fiber stacking device described in Patent Document 1, the outer surface of the fiber-receiving portion corresponding to the high-part recess portion in the recess for collecting is recessed, and it is difficult to manufacture including the desired base weight. The absorber of the part.

Further, in the fiber stacking device described in Patent Document 2, the fiber material fibers are first deposited in the middle and high portion recesses, and the fiber material fibers are deposited in the collecting recesses other than the middle and high portion recesses. The suction force decreases as the thickness of the pulp pile increases. Therefore, in the same manner as the fiber stacking device described in Patent Document 1, the outer surface of the fiber-receiving portion corresponding to the high-part recess portion in the recess for collecting is recessed, and it is difficult to manufacture including the desired base weight. The absorber of the part.

Further, in the fiber stacking device described in Patent Document 3, it is necessary to apply the pair of stacking plates to the outer surface of the fiber stacking portion corresponding to the upper portion of the recessed portion in the collecting recess, and to remove the middle and high portions. The outer surface of the fiber accumulation portion corresponding to the concave portion other than the concave portion is adjusted to have the same height, and the operation is complicated. Further, in the fiber stacking device described in Patent Document 3, the pulp is brought close to the center of the outer surface of the rotating cylinder by the collecting plate corresponding to the center between the pair of collecting plates, so that not only a large amount of pulp is accumulated in the middle and high portions, but also the pulp is also accumulated. A large amount of fibers are accumulated in the center of the front and rear peripheral portions, and it is difficult to process the absorber having a high basis weight ratio.

Accordingly, it is an object of the present invention to provide an apparatus for manufacturing an absorbent body which eliminates the disadvantages of the prior art described above.

The present invention relates to a manufacturing apparatus for an absorbent body comprising: a rotating cylinder having a collecting recess on an outer peripheral surface; and a duct that rotates the formed body material in a scattered state toward the rotating body The outer peripheral surface of the cylinder is supplied; and the molded body material fiber is deposited on the accumulation recess by the air flow generated by the suction from the inside of the rotary cylinder to form the absorber. The collecting recess has the first region, and a second region deeper than the first region, in the space inside the duct, in a space separated by a hanging plate that is suspended from a top surface of the duct in a downstream direction of the rotating cylinder, includes a scraper roller and a duct opening The scraper roller is disposed such that the surface thereof is in contact with the molded material, and the excess amount of the molded body material is scraped off, and the pipe opening portion is disposed above the rotating drum. The downstream side of the rotation direction and the outside atmosphere is taken in. The inside of the duct is divided into a fiber accumulation region and a fiber re-depositing region by the hanging plate, and the fiber accumulation region is closer to the upstream side in the rotation direction of the rotating cylinder than the hanging plate, so that the molded body material in a scattered state is self-contained. The accumulation of the recessed portion is excessively distributed, and the fiber re-depositing region is located on the downstream side of the rotating cylinder in the rotation direction of the lowering plate, and the excess amount of the molded body material is scraped by the scraper. The scraped material of the molded body material is further deposited on the accumulation recess.

The present invention (second invention) relates to a manufacturing apparatus for an absorbent body, comprising: a rotating cylinder having a collecting recess on an outer peripheral surface; and a duct that rotates the formed body material in a scattering state The outer peripheral surface of the cylinder is supplied; and the molded body material fiber is deposited on the accumulation recess by the air flow generated by the suction from the inside of the rotary cylinder to form the absorber. The collecting recess has a first region and a second region having a depth deeper than the first region, and includes a pair of partition plates and a scraper roller inside the duct, and the pair of partition plates are disposed in the rotating drum The both sides of the circumferential direction are disposed so as to be in contact with the molded material, and the excess amount of the molded body material accumulated by the fibers is scraped off. In the pair of partition plates, the molded body material in a scattering state is excessively accumulated in the accumulation recessed portion so that the fibers are accumulated in the region corresponding to the pair of partition plates. The arrangement is arranged such that the pair of partition plates are spaced apart from each other. The scraping roller is disposed at a position away from the downstream side of the pair of partition plates in the rotation direction of the rotating cylinder, so that the scraping fibers are accumulated in an excess amount of the region corresponding to the pair of partition plates. Molding material, and will The scraped material of the molded body material is further deposited on both side portions of the portion where the excessive fibers are accumulated in the accumulation recess.

Moreover, the present invention (second invention) relates to a method for producing an absorbent body, comprising a fiber stacking step of scattering a cylinder having a concave portion for collecting on an outer peripheral surface, and scattering the outer peripheral surface of the rotary cylinder In the state, the molded body material is supplied, and the molded material fiber is deposited on the accumulation recess. In the fiber stacking step, the formed body material in a scattering state is excessively accumulated in the scattering state by a pair of partition plates in a region corresponding to the pair of partition plates in the accumulation recess. The method for producing an absorbent body according to the second aspect of the invention is after the fiber stacking step, comprising a fiber re-stacking step of scraping off the formed body material of the excess fiber and scraping The molded body material fibers are further deposited on both side portions of the portion where the excessive fibers are accumulated in the accumulation concave portion.

1‧‧‧Fiber accumulation device

2‧‧‧Rotating cylinder

2X‧‧‧Rotating cylinder circumference

2Y‧‧‧Rotary tube width direction

3‧‧‧ absorber

4‧‧‧ Pipes

4S‧‧‧ Space

5‧‧‧Feed roller

6‧‧‧Vacuum conveyor

7‧‧‧cutting device

10‧‧‧Fiber accumulation device

11‧‧‧vacuum box

13‧‧‧Net belt

14‧‧‧Free roll

15‧‧‧Feed roller

20‧‧‧Adjustment

21‧‧‧ outer perimeter

22‧‧‧Concave recess

22a‧‧‧ bottom

23‧‧‧ Middle and high recesses

23a‧‧‧ bottom

24‧‧‧Sucking adjustment plate

24a‧‧‧Outer surface

25‧‧‧Medium and high porosity plates

25a‧‧‧Outer surface

26‧‧‧ Space board

26a‧‧‧Outer surface

27‧‧‧Porous plate

27a‧‧‧Outer surface

28‧‧‧ recessed partition board

28a‧‧‧Outer surface

29‧‧‧ ring plate

29a‧‧‧Outer surface

32‧‧‧Fiber deposits

33‧‧‧ Thick Wall

34‧‧‧ Thin wall

37‧‧‧Package

40‧‧‧ side wall

41‧‧‧ partition board

41a‧‧‧End

41d‧‧‧Bottom

42‧‧‧ scraper

43‧‧‧Down board

44‧‧‧ Pipe opening

61‧‧‧ drive roller

62‧‧‧ driven roller

63‧‧‧ breathable belt

64‧‧‧Conveyor vacuum box

71‧‧‧cutting knife

72‧‧‧Cutting rolls

73‧‧‧Anvil Roll

241‧‧‧Circular division forming members

242‧‧‧MD division forming components

243‧‧‧CD division forming members

244‧‧‧Circular opening

245‧‧‧ openings

261‧‧‧Circular division forming members

262‧‧‧MD division forming components

263‧‧‧CD division forming components

264‧‧‧Circular inner opening

265‧‧‧ openings

271‧‧‧ openings

281‧‧‧Cross-shaped opening

282‧‧‧ Opening division forming member

283‧‧‧ openings

284‧‧‧ Opening division

285‧‧‧MD division forming components

286‧‧‧CD division forming components

291‧‧‧ fixed plate

292‧‧‧Center shaft

293‧‧‧ board

331‧‧‧Divided thick wall

341‧‧‧Divided thin wall

421‧‧‧ Roller body

422‧‧‧ Protrusion

441‧‧‧Locking plate

A‧‧‧ space

B‧‧‧ Space

C‧‧‧ Space

D‧‧‧ Space

E‧‧‧ Space

PT‧‧‧Fiber accumulation area

R2‧‧‧ arrow

R3‧‧‧ arrow

R5‧‧‧ arrow

RPT‧‧‧ fiber re-accumulation area

Fig. 1 is a schematic perspective view showing an embodiment (this embodiment) of an apparatus for manufacturing an absorbent body according to the first aspect of the invention.

Fig. 2 is a view showing the outer peripheral portion (the concave portion for collecting) of the rotary cylinder in the manufacturing apparatus shown in Fig. 1 in a planar shape.

Fig. 3 is an exploded perspective view showing the outer peripheral portion of the rotary cylinder shown in Fig. 1.

Fig. 4 is a cross-sectional view schematically showing a cross section taken along line IV-IV of Fig. 1.

Fig. 5 is a cross-sectional view schematically showing a portion of Fig. 4.

Fig. 6 is a cross-sectional view schematically showing a cross section taken along line VI-VI of Fig. 1.

Fig. 7 is a cross-sectional view schematically showing a portion of Fig. 6.

Fig. 8 is a perspective view showing a fiber deposit which is released from the collecting recess of the rotary cylinder in the manufacturing apparatus shown in Fig. 1.

Fig. 9 is a schematic perspective view showing an embodiment (this embodiment) of an apparatus for manufacturing an absorbent body according to the second aspect of the invention.

Fig. 10 is a view showing the outer peripheral portion (the concave portion for collecting) of the rotary cylinder in the manufacturing apparatus shown in Fig. 9 in a planar shape.

Fig. 11 is an exploded perspective view showing the outer peripheral portion of the rotary cylinder shown in Fig. 9.

Fig. 12 is a cross-sectional view schematically showing a cross section taken along line IV-IV of Fig. 9.

Figure 13 is a cross-sectional view schematically showing a portion of Figure 12.

Fig. 14 is a cross-sectional view schematically showing a cross section taken along line VI-VI of Fig. 9.

Figure 15 is a cross-sectional view schematically showing a portion of Figure 14.

Fig. 16 is a perspective view showing a fiber deposit which is released from the collecting recess of the rotary cylinder in the manufacturing apparatus shown in Fig. 9.

Fig. 17 is an exploded perspective view showing the outer peripheral portion of the rotary cylinder in the apparatus for manufacturing an absorbent body according to another embodiment of the present invention (second invention).

Hereinafter, the present invention (first invention) will be described with reference to the drawings based on preferred embodiments thereof.

Fig. 1 shows an outline of a fiber stacking apparatus according to a preferred embodiment of the apparatus for producing an absorbent body according to the first aspect of the invention. The fiber stacking device 1 of the present embodiment is a manufacturing apparatus of the absorber 3, and has a rotating drum 2 having a collecting recess 22 on the outer peripheral surface 21, and a duct 4 for squeezing the formed body material toward the rotating drum 2 The outer peripheral surface 21 is supplied; and the absorbent body 3 is molded by depositing the molded body material fibers in the collecting recess 22 by the air flow generated by the suction inside the rotating cylinder 2. Further, the collecting recess 22 has a first region and a second region having a depth deeper than the first region. In the fiber stacking device 1 of the present embodiment, as shown in FIG. 2, the second region of the collecting recess 22 is formed by the recess portion 23 which is disposed deeper than the stacking recess 22 in the central portion of the collecting recess 22 . Further, the first region of the collecting recess 22 is formed by the collecting recess 22 other than the high recess 23 in the central region. In other words, the fiber stacking device 1 of the present embodiment includes a rotating drum 2 having a collecting recess 22 on the outer peripheral surface 21 and a recess for collecting the same. The central portion 22 has a deeper and higher concave portion 23 than the collecting recess 22, and a duct 4 that supplies the molded body material to the outer peripheral surface 21 of the rotating cylinder 2 in a scattered state. In detail, the fiber stacking device 1 includes a rotating drum 2 that is rotationally driven in the direction of an arrow R2, a duct 4 that supplies a molded body material to the outer peripheral surface 21 of the rotating drum 2, and a transfer roller 5 that is disposed in the rotating drum 2 is obliquely downward and is rotationally driven in the direction of arrow R5; a vacuum conveyor 6 disposed below the transfer roller 5; and a cutting device 7. In the fiber stacking device 1, further, the vacuum box 11 is disposed between the pipe 4 and the transfer roller 5 in the circumferential direction of the rotary drum 2, and the mesh belt 13 is passed between the vacuum box 11 and the rotary drum 2 and the material is fed. The roller 5 is disposed between the roller 5 and the rotary cylinder 2, and the windshield 15 is disposed adjacent to the outer peripheral surface of the transfer roller 5. Further, the fiber stacking device 1 of the present embodiment is provided with the vacuum box 11 and the windshield 15 from the viewpoint of stabilizing the fiber deposit in the collecting recess 22, and the windshield plate 15 is provided. Settings. As shown in Fig. 1, the rotation direction of the rotary cylinder 2 is a rotation direction in the direction of the arrow R2 in the opposite direction with respect to the conveyance direction of the core wrap sheet 37 described below, and the rotation direction of the transfer roller 5 is relative to The conveying direction of the packaged chip material 37 is the direction of rotation in the direction of the arrow R5 in the positive direction.

As shown in Fig. 1, the rotary cylinder 2 is formed in a cylindrical shape and receives power from a prime mover such as a motor, and a portion of the outer peripheral surface 21 of the rotary cylinder 2 is rotated about a horizontal axis. As shown in Fig. 2, the rotating cylinder 2 has a collecting recess 22 for depositing fibers of a molded body material on the outer peripheral surface 21, and further has a center in the width direction (2Y direction) of the rotating cylinder 2 disposed in the collecting recess 22 The area is deeper and higher than the recess 22 for the accumulation. The collecting recess 22 including the middle-high recess 23 is formed in a plurality of predetermined intervals in the circumferential direction (2X direction) of the rotary cylinder 2. In FIG. 2, the 2X direction is the circumferential direction of the rotary cylinder 2, and the 2Y direction is the width direction of the rotary cylinder 2 (the direction parallel to the rotation axis of the rotary cylinder 2).

As shown in Fig. 3, in the fiber stacking device 1 of the present embodiment, the rotary cylinder 2 has a cylindrical drum body (not shown) including a rigid body made of metal, and a suction adjustment plate 24 which is overlapped. Fixed to the outer circumference of the drum body; medium-high porous plate 25 (porous structure) And superposedly fixed to the outer surface 24a side of the suction adjustment plate 24; the space plate 26 is superposedly fixed to the outer surface 25a side of the medium-high porosity plate 25; the porous plate 27 (porous member) ), which is fixedly attached to the outer surface 26a side of the space plate 26; a concave partitioning plate 28 which is overlapped and fixed to the outer surface 27a side of the porous plate 27; and an annular plate 29 which is overlap-fixed to the concave portion The outer surface 28a side of the partitioning plate 28 is divided. The rotary cylinder 2 is formed by fixing the drum main body and the respective plates 24 to 29 to each other by a known fixing means such as a bolt or an adhesive. As shown in FIG. 2 and FIG. 3, the bottom surface 23a of the high-purpose recessed portion 23 as the molded body material is composed of a high-purpose porous plate 25 (porous member) having a plurality of suction holes. In addition, the bottom surface 22a of the concave portion 22 for the accumulation of the fiber-forming surface of the molded body material, and the bottom surface 22a of the concave portion 22 for the accumulation other than the portion for the middle-high concave portion 23 is composed of the porous sheet 27.

In addition, in the present specification, each of the constituent members of the rotary cylinder 2 (suction adjustment plate 24, medium-high porous plate 25, space plate 26, porous plate 27, concave portion dividing plate 28, annular plate 29, etc.) The surface is the surface of the constituent member facing the supply side of the molded body material when the fiber is deposited. Moreover, the inner surface of each of the constituent members is a surface on the opposite side (the inner side of the rotary cylinder) from the supply side of the molded body material in the constituent material of the constituent material. In the case where the molded body produced by the fiber stacking device 1 is an absorbent body for an absorbent article such as a disposable diaper or a menstrual napkin, the molded body material is an absorbent body material.

The shaped body material is a fiber material. As the molded body material of the absorbent body raw material, various materials of the absorbent body previously used for absorbent articles such as menstrual sanitary napkins or sanitary pads, disposable diapers, and the like can be used without particular limitation. For example, pulp fibers such as defibrated pulp, short fibers of cellulose fibers such as rayon fibers and cotton fibers, and short fibers of synthetic fibers such as polyethylene are used. These fiber materials may be used alone or in combination of two or more. Further, as the molded body material of the absorbent material, a water-absorbent polymer may be used together with the use of the fibrous material. Further, as a fibrous raw material, a fibrous water-absorbent polymer may be used alone. Or use with fiber materials. Further, it is also possible to use a deodorant, an antibacterial agent, or the like while using a fibrous material or the like as needed.

Regarding the annular plate 29, the outer surface 29a is located at the outermost side of the rotating cylinder 2, and is a member that forms a part of the outer peripheral surface 21, and is also a member that forms the outer peripheral surface of the collecting recess 22. Here, the "outer circumferential surface of the collecting recess 22" means that the collecting recess 22 is viewed from the outside in the normal direction of the outer peripheral surface of the rotating cylinder 2 (the direction orthogonal to the rotational axis direction of the rotating cylinder 2). The outer surface of the contour of the recess 22 is used. In the present invention, the operation of observing the object such as the collecting recess 22 from the outer side in the normal direction of the outer peripheral surface of the outer circumference of the rotating cylinder 2 is referred to as an object such as the concave portion 22 for the plan view. In the fiber stacking device 1 of the present embodiment, when the collecting recess 22 is viewed in plan, the collecting recess 22 has a rectangular shape having a long length in the conveying direction. Therefore, the pair of annular plates 29 and 29 are disposed in the rotating drum 2 The side portions, and the annular plates 29 are formed to extend over the entire circumference of the rotating cylinder 2 at the same width. Further, the thickness of each annular plate 29 is formed to be fixed.

In the annular plate 29 formed as described above, the distance between the pair of annular plates 29 and 29 serves as one of the elements for determining the width of the collecting recess 22, and the thickness of the annular plate 29 serves as an element for determining the depth of the collecting recess 22. One. The pair of annular plates 29 and 29 are airtight which does not allow air to pass, except for the portion between them. Here, the term "air impermeability" includes both the meaning of "impermeable property that does not allow air to pass through" and "the incompatibility of a small amount of air but does not substantially pass air", and is substantially not The meaning of breathability. As the annular plate 29, for example, a plate made of a metal such as stainless steel or aluminum or a resin plate may be used to form a plate having an opening (a space portion corresponding to the three-dimensional shape in the concave portion 22) or integrated by using a mold. A plate on which the opening is formed, a plate that has been punched or etched, or a plate that is superposed on the plate.

The recessed portion partitioning plate 28 has a plurality of cross-shaped opening portions 281 which are equal to penetrate in the thickness direction in plan view, and a cross-shaped opening portion partitioning forming member 282 which is divided into respective cross-shaped opening portions 281; a plurality of opening portions 283 , which are connected in the thickness direction; The opening portion dividing portion 284 is formed to define each opening portion 283. The cross-shaped opening portion 281 is intermittently arranged in plural in the circumferential direction (2X direction). Specifically, the opening division forming member 282 is formed in a cross shape having a portion extending in a strip shape at a fixed interval in the transport direction in a plan view, and a portion extending in the transport direction. A portion in which the central portion is substantially convex from the side edges toward the outer side in the width direction (2Y direction). More specifically, the front and rear ends of the portion extending in the conveying direction of the cross-shaped opening portion dividing member 282 formed in a cross shape are formed in an arc shape which is convexly curved outward. In addition, a portion in which one of the opening-division-dividing members 282 which is formed in a cross shape is formed in a convex shape on the outer side in the width direction (2Y direction) is formed in a trapezoidal shape in which the outer side is gradually shorter in the width direction (2Y direction). The opening portion 281 is located in the cross-shaped opening portion dividing member 282, and is formed in a cross shape having the same contour as the opening portion dividing member 282. In the region other than the plurality of cross-shaped openings 281 (the cross-shaped opening portion forming member 282), the opening portion defining portion 284 has a plurality of MD dividing forming members extending in parallel with the conveying direction. 285, and a plurality of CDs extending in a direction parallel to the width direction (2Y direction) (extending in a direction perpendicular to the transport direction) form a member 286. The opening division forming portion 284 is formed in a lattice shape by a plurality of MD division forming members 285 intersecting the plurality of CD division forming members 286, and each opening 283 is located in a lattice in the lattice-shaped opening division forming portion 284. The portion of the eye is formed to have the same contour as that of each of the opening portion forming portions 284.

The cross-shaped opening division forming member 282 and the opening division forming portion 284 having the MD division forming member 285 and the CD division forming member 286 have airtightness that does not allow air to pass therethrough. The "air impermeability" mentioned herein is as described above. As a material for forming the gas-impermeable opening division forming members 282 and 284, a metal such as stainless steel, aluminum, or iron, a resin, or a combination of these may be used. The plurality of cross-shaped openings 281 and the plurality of openings 283 included in the recessed partitioning plate 28 are disposed in a region sandwiched by the pair of annular plates 29 and 29 that are overlapped and fixed to the outer surface 28a of the recessed partitioning plate 28. Constituent The thickness of the cross-shaped opening portion forming member 282 and the lattice-shaped opening portion forming portion 284 of the partitioning plate 28 is fixed. The thickness of the recessed partitioning plate 28 is also one of the elements determining the depth of the collecting recess 22, similarly to the thickness of the annular plate 29.

The porous plate 27 has a plurality of cross-shaped openings 271 in plan view. The cross-shaped opening portion 271 of the porous plate 27 is disposed at the same position as each of the cross-shaped opening portions 281 of the concave portion dividing plate 28 that is superposed and fixed to the outer surface 27a of the porous plate 27. The plurality of cross-shaped opening portions 271 of the porous plate 27 are in one-to-one correspondence with the plurality of cross-shaped opening portions 281 of the concave portion dividing plate 28, and have a similar relationship in plan view. In the fiber stacking device 1 of the present embodiment, the similarity ratio of the cross-shaped opening portion 271 of the porous plate 27 to the cross-shaped opening portion 281 of the corresponding concave portion dividing plate 28 is 1, the opening portion 271 and the opening portion 281. There is a relationship in which the top shapes are identical to each other.

The porous plate 27 is a member that forms the bottom surface 22a of the collecting recess 22 except for the portion of the middle-high recess 23 . The porous plate 27 is a gas permeable plate as follows, that is, a gas flow (vacuum air) generated by suction from the inner side of the fiber stacking device 1 (inside of the rotary drum 2). It is conducted to the inside of the duct 4 which covers the rotating drum 2, and does not hold the molded material conveyed by this airflow, and only transmits air. In the porous plate 27, a plurality of (a plurality of) suction holes (micropores) penetrating the plate 27 in the thickness direction are formed in a uniform distribution in a region other than the plurality of cross-shaped openings 271 for accumulation. While the recessed portion 22 passes through the space in which the inside of the rotating cylinder 2 is maintained at a negative pressure, the suction hole functions as a through hole of the airflow. As the porous plate 27, for example, a mesh plate made of metal or resin, or a plurality of micropores (for a plurality of micropores) formed by etching or punching on a metal or resin plate can be used.

The space plate 26 has an annular partition forming member 261 which is formed in a plan view along a contour of each of the cross-shaped opening portions 271 of the porous plate 27 which is fixedly attached to the outer surface 26a of the space plate 26 in a plan view; Dividing the forming member 262, which extends in parallel with the conveying direction; and a plurality of CD dividing forming members 263 which are parallel to the width direction (2Y direction) Ground extension (extending in a direction perpendicular to the direction of transport). The MD division forming member 262 and the CD division forming member 263 not only intersect each other but also intersect the annular division forming member 261 to form a lattice shape. The space plate 26 is formed in a region surrounded by the annular division forming member 261, and has a plurality of annular inner opening portions 264 which are located at the intersection of the MD division forming member 262 and the CD division forming member 263. Part of the eye of the lattice and penetrated in the thickness direction. Further, the space plate 26 is provided in a region other than the annular division forming member 261, and has a plurality of openings 265 which are located in the lattice of the intersection of the MD division forming member 262 and the CD division forming member 263. Part of it and penetrate in the thickness direction.

As described above, the annular partition forming member 261 of the space plate 26 is formed along the contour of each of the cross-shaped opening portions 271 of the porous plates 27 which are fixedly fixed to the outer surface 26a of the space plate 26, and the space plate 26 The plurality of annular division forming members 261 are in one-to-one correspondence with the contours of the plurality of cross-shaped opening portions 271 of the porous sheet 27, and have a relationship in which the planar shapes are similar to each other. In the fiber stacking device 1 of the present embodiment, the similarity ratio of the outlines of the plurality of annular division forming members 261 of the space plate 26 with respect to the cross-shaped opening portion 271 of the corresponding porous plate 27 is one. Therefore, the plan view shape of the annular division forming member 261 is not only identical to the contour of the opening portion 271 of the porous plate 27, but also divided into concave portions which are formed in a congruent relationship with the opening portion 271 of the porous plate 27. The outline of the opening division forming member 282 of the cross-shaped opening portion 281 of the plate 28 also has a relationship with each other. Furthermore, the so-called relationship of mutual congruence means that they are preferably identical to each other, but also include situations in which the sizes are slightly different.

Further, the plurality of openings 265 of the space plate 26 are in one-to-one correspondence with the plurality of openings 283 of the recessed partitioning plate 28 which are fixed to the outer surface 26a of the space plate 26 via the porous plate 27, and have a shape in a plan view. Similar relationship. In the fiber stacking device 1 of the present embodiment, the similarity ratio of the opening portion 265 of the space plate 26 to the opening portion 283 of the corresponding recessed portion partitioning plate 28 is 1, and the opening portion 265 and the opening portion 283 have the same shape in plan view. turn off system. The thickness of the annular division forming member 261, the MD division forming member 262, and the CD division forming member 263 constituting the space plate 26 is formed to be fixed. The thickness of the space plate 26 is one of the elements that determine the depth of the high-purpose recess 23 in the central region of the accumulation recess 22 .

The annular division forming member 261, the MD division forming member 262, and the CD division forming member 263 of the space plate 26 have airtightness that does not allow air to pass therethrough. The "air impermeability" mentioned herein is as described above. As a material for forming the gas-impermeable ring-dividing member 261, the MD-dividing member 262, and the CD-dividing member 263, a metal such as stainless steel, aluminum, or iron, or a resin, or a combination thereof may be used. .

The medium-high porosity plate 25 is provided in a plurality of shapes in plan view and each formed into a cross shape. Each of the cross-shaped high-and-high-porosity plates 25 is disposed at the same position as each of the annular partition forming members 261 that are fixedly fixed to the space plate 26 of the outer surface 25a of the intermediate-high porous plate 25. The outline of the plurality of cross-shaped high-purpose porous sheets 25 is in one-to-one correspondence with the plurality of annular partition forming members 261 of the space plate 26, and has a relationship in which the planar shapes are similar to each other. In the fiber stacking device 1 of the present embodiment, the similarity ratio of the cross-shaped high-purpose porous plate 25 to the annular partition forming member 261 of the corresponding space plate 26 is one. Therefore, the cross-shaped medium-high porosity plate 25 has a congruent relationship with the annular partition forming member 261, and has an overall shape and a cross shape of the opening portion 271 of the porous plate 27 and the concave portion dividing plate 28. The opening portion 281 also has a relationship in which the top view shapes are identical.

The medium-high porous plate 25 is a member that forms the bottom surface 23a of the middle-high recess 23 . In the same manner as the porous sheet 27, the medium-high porous sheet 25 is a gas permeable sheet which is formed by suction from the inner side of the fiber stacking device 1 (inside of the rotary drum 2). The (vacuum flow) is conducted into the duct 4 covering the rotary cylinder 2, and the molded body material that is conveyed by the airflow is not transmitted, and only air is transmitted. In the medium-high porous plate 25, a plurality of (a plurality of) suction holes (micropores) which penetrate the plate 25 in the thickness direction are formed in a uniform distribution, and the high-concave recess 23 is rotated in the accumulation recess 22 While the inside of the cylinder 2 is maintained in a space of negative pressure, the suction hole functions as a through hole of the airflow. can. As the medium-high porosity plate 25, for example, a mesh plate made of metal or resin, or a plurality of micropores formed of a metal or resin plate by etching or punching can be used.

The suction adjustment plate 24 has an annular division forming member 241 which is formed to be contoured in a cross shape which is fixed to the outer surface 24a of the suction adjustment plate 24 in a plan view, and has a contour of the high-purpose porous plate 25; The strip MD division forming member 242 extends in parallel with the conveyance direction, and a plurality of CD division forming members 243 which extend in parallel with the width direction (2Y direction) (extending in a direction perpendicular to the conveyance direction). The MD division forming member 242 and the CD division forming member 243 not only intersect each other but also intersect the annular division forming member 241 to form a lattice shape. The suction adjustment plate 24 is in a region surrounded by the annular division forming member 241, and has a plurality of annular inner opening portions 244 which are located in the MD division forming member 242 and the CD division forming member. A portion of the eye of the 243 crossed lattice and penetrated in the thickness direction. The plurality of annular inner opening portions 244 of the suction adjusting plate 24 are a plurality of annular inner opening portions 264 that are fixed to the space plate 26 on the outer surface 24a of the suction adjusting plate 24 via the medium-high porous plate 25. One-to-one correspondence, and there is a relationship in which the top views are similar to each other. In the fiber stacking device 1 of the present embodiment, the similarity ratio of the annular inner opening portion 244 of the suction adjusting plate 24 to the annular inner opening portion 264 of the corresponding space plate 26 is 1, and the annular inner opening portion 244 is The annular inner opening portion 264 has a relationship in which the planar shapes are identical to each other.

The suction adjustment plate 24 is provided in a region other than the annular division forming member 241, and has a plurality of openings 245 which are located in the lattice of the grid in which the MD division forming member 242 and the CD division forming member 243 intersect. Part of it, and penetrates in the thickness direction. The plurality of openings 245 of the suction adjustment plate 24 are in one-to-one correspondence with the plurality of openings 265 of the space plate 26 that are fixed to the outer surface 24a of the suction adjustment plate 24 by the medium-high porosity plate 25, and are present. The relationship between the shapes looks similar to each other. In the fiber stacking device 1 of the present embodiment, the similarity ratio of the opening portion 245 of the suction adjusting plate 24 to the opening portion 265 of the corresponding space plate 26 is less than 1, and the similarity is preferably 0.05 or more and 0.5 or less. That is, suction adjustment The opening area of the opening 245 of the plate 24 is smaller than the opening area of the opening 265 of the space plate 26. The ratio (S2/S1) of the opening area (S2) of the opening 245 of the suction adjusting plate 24 to the opening area (S1) of the opening 265 of the space plate 26 is preferably 50% or more and 5% or less (5%). The above and 50% or less) is further preferably 15% or more and 7% or less (7% or more and 15% or less).

The thickness of the annular division forming member 241, the MD division forming member 242, and the CD division forming member 243 constituting the suction adjustment plate 24 is formed to be fixed. The annular division forming member 241, the MD division forming member 242, and the CD division forming member 243 of the suction adjustment plate 24 have airtightness that does not allow air to pass therethrough. The "air impermeability" mentioned herein is as described above. As a material for forming the gas-impermeable ring-dividing member 241, the MD-dividing member 242, and the CD-dividing member 243, a metal such as stainless steel, aluminum, or iron, or a resin, or a combination thereof may be used. .

The rotary cylinder 2 is a suction adjustment plate 24, a plurality of medium-high porous plates 25, a space plate 26, a porous plate 27, a concave partition plate 28, and a pair of annular plates which are configured as described above by a known fixing means. 29 is formed by mutual fixation. As shown in FIG. 2, the rotating cylinder 2 included in the fiber stacking device 1 of the present embodiment configured as described above is disposed on the inner surface side of the porous member of the collecting recess 22, and the adjusting body 20 for adjusting the suction force is overlapped. Disposed on the inner surface of the porous member. The adjustment body 20 has a plurality of openings that penetrate the adjustment body 20 in the thickness direction, and one of the openings is a portion of the opening portion that is relatively far from the porous member of the accumulation recess 22 and is relatively close to one of the openings. The opening area is smaller than that of the part. The adjustment body 20 for adjusting the suction force is not disposed on the inner surface side of the porous member of the intermediate-high recess 23, and the opening area and the inner surface side of the outer surface side of the suction hole (microporous) of the porous member are not disposed. The opening area is the same. Specifically, the opening area of the opening on the outer surface side of the porous member disposed on the intermediate-high recess 23 is the same as the opening area of the opening disposed on the inner surface side of the porous member. Hereinafter, it demonstrates concretely.

Regarding the high-purpose recess 23 formed in the collecting recess 22 formed on the outer surface 21 of the rotating cylinder 2, as shown in FIG. 2, the outline is formed by the annular shape of the suction adjusting plate 24 in plan view. The contour of the member 241, the middle-high porosity plate 25, the annular division forming member 261 of the space plate 26, the outline of the opening 271 of the porous plate 27, and the position of the opening division forming member 282 of the concave partitioning plate 28 are the same. The manner is formed in a cross shape. Further, in the high-convex recess 23 of the accumulating recess 22, the bottom surface 23a is formed of a medium-high porous plate 25 (porous member), and in the region of the middle-high recess 23, as shown in FIG. The plurality of annular inner opening portions 244 of the suction adjusting plate 24 sandwiching the middle and high-purpose porous plates 25 coincide with the positions and shapes of the plurality of annular inner opening portions 264 of the space plate 26. In this way, the porous adjustment plate 25 (porous member) is disposed on the inner side of the rotating cylinder 2, and the suction adjustment plate 24 is disposed on the bottom surface 23a of the intermediate portion 23a. The opening area of the annular inner opening portion 264 of the space plate 26 on the outer surface side is the same as the opening area of the annular inner opening portion 244 of the suction adjusting plate 24 disposed on the inner surface side of the medium-high porous plate 25. Therefore, in the accumulation recessed portion 22, the inner surface side of the high-purpose recessed portion 23 among the high-purpose recessed portions 23 is not disposed with the adjustment body 20 for adjusting the suction force. Further, as shown in FIG. 4, the high-purpose concave portion 23 of the accumulation concave portion 22 has a thickness which is the thickness of the space plate 26 disposed on the medium-high porous plate 25, the thickness of the concave portion dividing plate 28, and the annular plate 29. Formed by thickness.

As shown in FIG. 2, the collecting recess 22 formed on the outer surface 21 of the rotary cylinder 2 is formed in a strip shape by sandwiching a pair of rectangular annular plates 29 and 29 in plan view. In addition, the bottom surface 22a of the region other than the middle-high recess 23 is composed of the porous plate 27 (porous member), and the region other than the middle-high recess 23 is as shown in FIG. When the plurality of openings 283 of the recessed portion partitioning plate 28 coincide with the positions and shapes of the plurality of openings 265 of the space plate 26, the opening areas of the openings 283 and 265 are disposed closer to the center of the openings 283 and 265. The opening 245 of the suction adjustment plate 24 is smaller. That is, the opening area of the opening portion 245 of the suction adjusting plate 24 is smaller than the opening area of each of the opening portion 283 of the recess portion dividing plate 28 and the opening portion 265 of the space plate 26. In this way, the porous sheet of the bottom surface 22a of the region other than the middle-high recess 23 is formed to constitute the recess 22 for the accumulation. 27 (porous member) is further disposed on the inner side of the rotary cylinder 2, and the space plate 26 and the suction adjustment plate 24 are disposed, and the opening of the suction adjustment plate 24 is one of the distances far from the porous plate 27 (porous member). 245, since the opening area is smaller than the opening 265 of the space plate 26 which is relatively close to each other, the suction suction is disposed on the inner surface side of the porous plate 27 (porous member) in the accumulation recess 22 Force adjustment body 20. Further, as shown in FIG. 4, the depth of the concave portion 22 for accumulation (excluding the concave portion 23 for the middle height) is formed by the thickness of the concave portion dividing plate 28 disposed on the porous sheet 27 and the thickness of the annular plate 29.

When the adjustment body 20 having a small opening area is disposed on the inner surface side of the porous plate 27 (porous member) in the accumulation recess 22, the porous plate 25 (porous) is used as the high-receiving recess 23 Compared with the case where the adjustment body 20 having a large opening area is disposed on the inner surface side of the member, it is possible to suppress the air flow (vacuum flow) which draws the molded body material through the porous member by suction from the inner side of the device. . That is, as shown in FIG. 5, the airflow (indicated by an arrow in FIG. 5) which flows through the porous plate 27 and flows inward from the outer side of the rotating cylinder 2 is attached to the area of the bottom of the recessed portion 22 where the adjusting body 20 is disposed, according to The order of the porous plate 27, the opening 265 of the space plate 26, and the opening 245 of the suction adjusting plate 24 passes through the respective constituent members of the rotating cylinder 2. At this time, with respect to the air flow, the opening portion 245 of the suction adjusting plate 24 that functions as the suction portion of the molded body material and which is located below the air flow, is located above the air flow portion of the opening portion 245. Since the opening area 265 of the space plate 26 has a smaller opening area, the gas permeability through the porous plate 27 is hindered, and the air flow amount of the air flow can be suppressed.

In the fiber stacking step of sucking the molded body material supplied with the airflow to the collecting recess 22 and depositing the fibers, the basis weight of the molded body material depends on the amount of air flowing through the porous member. Therefore, by arranging the adjustment body 20 on the inner surface side of the porous member and the region corresponding to the portion of the molded body material to which the fiber is to be deposited is smaller than the other portions, it is possible to manufacture the desired device by simple equipment. A molded body having a reduced basis weight. In other words, since the adjustment body 20 is disposed on the inner surface side of the region other than the middle height recess 23 of the accumulation recess 22, the low-weight fiber accumulation region and the accumulation recess 22 are included. Since the high-purpose recessed portion 23 is not provided with the adjustment body 20 on the inner surface side, it becomes a high basis weight fiber accumulation region.

Further, as will be described with reference to the fiber stacking device 1 of the present embodiment, as shown in Fig. 1, the rotary cylinder 2 has a plurality of spaces partitioned therein (portion on the side of the rotating shaft) and has a suction force for adjusting each space. The suction force adjustment mechanism. Specifically, the rotary cylinder 2 is formed so that the portion on the inner side (rotational axis side) of the portion on which the outer peripheral surface 21 is formed does not rotate, and has a disk shape at both end portions in the width direction of the rotary cylinder 2 . The fixing plates 291 and 291 and the cylindrical center shaft portion 292 that connects the two fixing plates 291 and 291 are connected. The fixing plates 291 and 291 and the center shaft portion 292 include a rigid body made of metal and are integrally formed. Inside the rotary cylinder 2, a plurality of metal plates 293 are disposed between the two fixed plates 291 and 291, and are disposed from the outer peripheral surface of the central shaft portion 292 toward the outer peripheral surface 21, and four plates are disposed in the fiber stacking device 1. 293. Each of the plates 293 extends from the outer peripheral surface of the central shaft portion 292 to the outer periphery of each of the fixing plates 291. After being separated by the four plates 293, the inside of the rotary cylinder 2 is separated from each other by the adjacent plates 293 in the circumferential direction (2X direction) of the rotary cylinder 2 to form independent spaces A, B, C, and D. An intake fan (not shown) is connected to the central shaft portion 292, and the pressure of the independent spaces A to D can be adjusted by driving the intake fan. In the fiber stacking device 1, the space A and the space B are maintained at a negative pressure.

As shown in FIGS. 1 and 6, the space A and the space B are located in a region where the outer peripheral surface 21 is covered by the duct 4. The plate 293 separating the space A from the space B extends toward the vicinity of the front end of the hanging plate 43 which is suspended from the top surface of the duct 4 below. The negative pressure of the space B is set to be the same as or weaker than the negative pressure of the space A, and is set to a negative pressure which is weaker than the negative pressure of the space A in the fiber stacking device 1. In FIG. 6, in order to explain the space A and the space B inside the rotary cylinder 2, the state in which the fixed plate 291 is removed is shown.

Further, the remaining spaces C and D of the rotary cylinder 2 are set to atmospheric pressure (zero pressure). In the space C, the outside air is sucked by the suction from the vacuum chamber 11 side described below, and is sucked into the outside air by the self-propagating roller 5 side in the space D. In order to carry out the space C well The transfer (transfer of the fiber deposit in the accumulation recess 22 to the transfer roller 5 or the like), the space C is separated from the space D which is the region after the transfer. The rotating drum 2 may have a jet (airflow) toward the porous plate 27 from the inside of the rotating cylinder 2 in a space (space C) corresponding to the transfer position of the fiber deposit in the collecting recess 22 to the transfer roller 5. The institution that produced it. In this case, by actively ejecting from the space C toward the vacuum box 11 by using the generating mechanism, it is possible to promote the release of the fiber deposit from the collecting recess 22 .

Furthermore, the space C is usually set to a negative pressure or zero pressure (atmospheric pressure) which is weaker than the space B. Before transferring the fibrous deposit in the collecting recess 22 to the transfer roller 5, it is preferable to make the space C a weak negative pressure from the viewpoint of the transportability of the fibrous deposit. The fiber deposit is sucked and held in the collecting recess 22, but if the conveying property is not particularly problematic, the transfer property is considered, and the space C is preferably zero pressure. Further, since the space D is a region where the fiber deposit in the accumulation recess 22 is transferred to the transfer roller 5 and the accumulation recess 22 passes, it is preferably zero pressure or positive pressure.

As shown in FIG. 1, the pipe 4 has one end side located on the space A and the space B of the rotating drum 2, and covers the outer peripheral surface 21 of the rotating cylinder 2 over the entire area of the space A and the space B, as shown in FIG. A molded body material introduction device (not shown) is provided on one end side. The molded body material introducing device includes, for example, a pulverizer that pulverizes the sheet-like wood pulp to form a defibrated pulp, and feeds the defibrated pulp (fiber material) into the pipe 4. A water-absorbent polymer introduction portion into which particles of the water-absorbent polymer are introduced may be provided in the middle of the duct 4.

Each of the collecting recesses 22 of the rotary cylinder 2 is sucked from the suction portion via the porous plate 27 and the medium-high porous plate 25 constituting the bottom surfaces 22a and 23a while being held in the space A which is maintained at the negative pressure. . The suction of the raw material of the absorbent body to the outer peripheral surface of the rotary cylinder 2 is generated in the duct 4 by the suction of the porous material of the porous material of each of the collecting recesses 22, and the raw material transported with the airflow is deposited in the airflow. Inside each of the collecting recesses 22.

In the fiber stacking device 1 of the present embodiment, as shown in FIG. 1, the pipe 4 corresponding to the space A on the upstream side in the rotation direction (R2 direction) of the rotating drum 2 is lower than the lower hanging plate 43 described below. Inside, a pair of partition plates 41 and 41 are provided on both sides of the rotary cylinder 2 in the circumferential direction (2X direction). Further, in the inside of the duct 4, the partition plates 41 and 41 disposed from the both side portions are spaced apart from the downstream side in the rotation direction (R2 direction) of the rotary cylinder 2, and a molded body in which an excessive amount of fiber accumulation is scraped is provided. The scraping roller 42 of the material.

The pair of partition plates 41, 41 extend along both sides of the rotating cylinder 2 in the circumferential direction (2X direction). Specifically, the pair of partition plates 41 and 41 are disposed inside the duct 4, and are disposed between the rotating drum 2 and the molded body material introducing device (not shown) on the other end side of the duct 4, and are disposed to rotate. One of the outer peripheral faces 21 of the cylinder 2 is opposed to the annular plates 29, 29, and extends in the circumferential direction (2X direction) along the annular plate 29. Further, each of the partition plates 41 is in the drum width direction (2Y direction), and as shown in FIG. 4, each of the side walls 40 constituting the duct 4 extends over the annular plate 29 to cover the rotating drum 2 when viewed in cross section. The position of the side portion of the collecting recess 22 in the circumferential direction (2X direction). More specifically, each of the partition plates 41 extends from the side wall 40 constituting the duct 4 over the annular plate 29 to the circumferential direction of the high-purpose recessed portion 23 (2X) disposed in the central portion of the collecting recess 22 of the rotating drum 2. Near the side edge of the direction). If the pair of partition plates 41 and 41 are extended to such a position, they may be plate-shaped or the like extending in parallel with the drum width direction (2Y direction), but it is preferable to have the other end side from the pipe 4 The side of the molded body material introduction device (not shown) is inclined so that the interval between the rotating cylinders 2 is gradually narrowed. When the pair of partition plates 41 and 41 have such an inclined surface, the molded body material is less likely to be deposited on the partition plate 41.

As the above-described inclined surface, in the fiber stacking device 1 of the present embodiment, as shown in Figs. 1 and 4, each of the partition plates 41 has a substantially right-angled triangular cross section, or the upper and lower bottoms are compared with the lower bottom. The pyramidal trapezoidal shape of the narrow trapezoidal profile. One of the trapezoidal trapezoidal shapes faces the rotating plates 2 from the side of the forming material introduction device (not shown) on the other end side of the duct 4 with respect to the partition plates 41 and 41. The narrowing is inclined, and the distance between the end portions 41a and 41a on the side of the rotating cylinder 2 of the pair of partition plates 41 and 41 is equal to the width of the high concave portion 23 in the central portion of the collecting recess 22 . As such a point As the material for forming the separator 41, a metal or a synthetic resin, a material obtained by combining the materials, or the like can be used.

Further, as shown in Fig. 1 and Fig. 6, the fiber stacking device 1 of the present embodiment is disposed inside the duct 4, and is separated by a hanging plate 43 which is suspended from the top surface of the duct 4 on the downstream side in the rotational direction 2X of the rotary cylinder 2. In the space 4S, the scraper roller 42 and the duct opening portion 44 are disposed, and the scraper roller 42 is disposed such that the surface thereof is in contact with the molded material deposited in the accumulating recess 22, and the molded body having an excessive amount of accumulated by the fiber is scraped off. In the material, the duct opening portion 44 is disposed on the downstream side of the rotating roller 2 in the rotation direction 2X of the rotating drum 42, and is sucked into the outside air. Specifically, the duct 4 is attached to the inside of the duct 4 and has a hanging plate 43 which hangs from the top surface of the duct 4 toward the vicinity of the outer end portion of the plate 293 which partitions the space A from the space B. The hanging plate 43 is formed in an arc shape that protrudes from the top surface of the duct 4 toward the upstream side of the circumferential direction (2X direction) of the rotary cylinder 2 over the entire width of the duct 4. The front end of the hanging plate 43 is lowered to a position where it does not come into contact with the top of the molded body material in an excessive amount of fiber accumulation in an overflow manner. A space 4S partitioned by the hanging plate 43 is formed inside the duct 4 by arranging such a hanging plate 43. When such a hanging plate 43 is disposed, the fiber accumulation region (the region where the defibrated molded body material fibers are deposited on the surface of the rotating cylinder 2) and the fiber re-depositing region (which will be scraped by the scraping roller 42) can be used. The region where the fibers of the formed body material are re-deposited is broken, and it is difficult to hinder the fiber accumulation of the molded body material located in the fiber accumulation region. A scraping roller 42 is disposed in the space 4S partitioned in this manner.

As shown in FIG. 1 and FIG. 6, the scraping roller 42 is disposed in the space 4S inside the duct 4, is disposed on the downstream side of the space B of the rotating drum 2, and is disposed in the rotating drum 2 so as to be in contact with the molded body material. Outside the peripheral surface 21 . The scraping roller 42 has a cylindrical roller body 421 and a plurality of protrusions 422 for scraping which are erected on the outer peripheral surface of the roller body 421. The scraper roller 42 is preferably disposed in the rotating drum 2 between the pair of annular plates 29 and 29 in the drum width direction (2Y direction), and the plurality of projections 422 are disposed at least in the central portion of the collecting recess 22 The region on the middle-high recess 23 is preferably disposed in a region between the pair of annular plates 29, 29, It is particularly preferable to configure the entire width of the rotary cylinder 2. In the fiber stacking device 1 of the present embodiment, the roller body 421 and the plurality of protrusions 422 are disposed on the rotating drum 2 between the annular plates 29 and 29. The scraping roller 42 is formed by scraping the excess amount of the molded body material which is accumulated in the accumulation recessed portion 22 by the projections 422. As a material for forming the protrusions 422, a metal such as stainless steel, aluminum, or iron, or a synthetic resin can be used. In the fiber stacking device 1 of the present embodiment, a brush made of a synthetic resin is used. The height of the projections 422 can be appropriately set according to the amount of the molded body material to be scraped, and in the fiber stacking device 1 of the present embodiment, the outer surface 29a of the annular plate 29 which reaches the outermost surface forming the rotary cylinder 2 is set. The height so far. Specifically, the height of the projection 422 is preferably a height of about 1 mm to 10 mm from the circumferential surface of the roller body 421 of the scraper roller 42.

The scraper roller 42 receives power from a prime mover such as a motor and rotates about a horizontal axis. In the fiber stacking device 1 of the present embodiment, the scraping roller 42 is rotationally driven in the direction of the arrow R3, and is rotated so as to face the rotating cylinder 2 so as to move in a direction opposite to the direction of rotation of the rotating drum 2. That is, in the fiber stacking device 1 of the present embodiment, the scraping roller 42 is rotated in the same direction as the rotating drum 2. The peripheral speed of the scraping roller 42 is preferably twice as large as the peripheral speed of the rotating drum 2 from the viewpoint of the balance between the amount of the formed body material and the re-stacking of the scraped formed body material in the vicinity. The above is 10 times or less, and more preferably 3 times or more and 5 times or less. That is, if the peripheral speed of the scraping roller 42 is faster than the peripheral speed of the rotary cylinder 2 as described above, the projection 422 of the scraping roller 42 comes into contact with the excessive amount of the molded body material which is accumulated in the accumulation recess 22 by the fiber. The number of times is increased, and the excess amount of the molded body material in the collecting recess 22 other than the portion for the middle-high recess portion 23 can be scraped. Further, the peripheral speed of the scraper roller 42 means the circumferential speed on the surface of the roller body 421, and the peripheral speed of the rotary cylinder 2 means the circumferential speed on the surface of the annular plate 29 which forms the outer peripheral surface 21 of the rotary cylinder 2.

As described above, as shown in FIGS. 1 and 6, the inside of the duct 4 includes a duct opening portion 44 for sucking the outside air on the downstream side of the rotating roller 2 in the rotational direction 2X of the rotating drum 2. In the fiber stacking device 1 of the embodiment, the duct opening portion 44 is formed in the duct 4 and is located in the duct The most downstream outlet of the drum 2 in the direction of rotation 2X. That is, the outlet of the duct 4 is opened to form the duct opening portion 44. Further, the duct opening portion 44 has an external air amount adjusting mechanism that adjusts the opening area thereof to adjust the amount of the outside atmosphere to be sucked. In the fiber stacking device 1 of the embodiment, the pipe opening portion 44 at the outlet of the duct 4 is provided with a lock plate 441 that closes the side of the lower rotating drum 2. The lock plate 441 is disposed across the entire width of the duct opening portion 44 of the duct 4, that is, between the side walls 40, 40 constituting the duct 4, and is formed to be rotatable from the top surface side of the duct 4 of the duct opening portion 44. By moving the side, the position of the duct opening portion 44 is adjusted by moving the lock plate 441, so that the amount of the outside atmosphere sucked into the gap between the top surface of the duct 4 and the scraper roller can be adjusted. Further, by changing the size of the lock plate 441, the opening area of the duct opening portion 44 is adjusted, whereby the amount of the outside atmosphere can be adjusted.

In detail, each of the collecting recesses 22 of the rotary cylinder 2 is placed in the space B which is maintained in the negative pressure by the space 4S of the duct 4, and is passed through the porous plate 27 and the intermediate height constituting the bottom surfaces 22a and 23a. The porous plate 25 is sucked from the suction portion. Therefore, the outside atmosphere is taken in from the duct opening portion 44 inside the space 4S of the duct 4. Further, the duct opening portion 44 adjusts the opening area of the duct opening portion 44 by the lock plate 441, thereby adjusting the amount of the outside atmosphere to be sucked.

As shown in FIG. 6 , the molded body material in the scattering state is deposited in the collecting recess 22 from the viewpoint of peeling off the molded body material scraped off by the scraping roller 42 from the projection 422 of the scraping roller 42. The flow rate (V1) of the external atmosphere drawn from the duct opening portion 44 between the scraper roller 42 and the top surface of the duct 4 is preferably faster than the self-pipe opening between the scraper roller 42 and the rotating drum 2. The flow rate (V2) of the external atmosphere inhaled by the portion 44. From the viewpoint of further exerting the above effects, the ratio (V1/V2) of the flow velocity (V1) of the outside atmosphere to the flow velocity (V2) of the external atmosphere is preferably 1 or more and 4 or less, and more preferably 1.5 or more. And 3 times or less. Specifically, the flow velocity (V1) of the outside atmosphere between the wiping roll 42 and the top surface of the duct 4 is preferably 5 m/s or more and 100 m/s or less, and more preferably 10 m/s or more and 70 m/s or less. The flow rate (V2) of the external atmosphere between the scraper roller 42 and the rotary cylinder 2 is preferably 0.1 m/s or more. Further, it is 70 m/s or less, and more preferably 0.1 m/s or more and 50 m/s or less. Further, the flow rate of the outside atmosphere can be measured by an anemometer such as an anemometer. From the viewpoint of such a flow rate, the duct opening portion 44 which forms an opening at the outlet of the duct 4 is provided in the height direction of the duct 4, and is provided at the position on the top surface side of the duct 4. More preferably, the duct opening portion 44 is preferably disposed above the rotating drum 2 than the rotating shaft of the scraping roller 42.

In the fiber stacking device 1 of the embodiment having the rotating drum 2 and the duct 4 configured as described above, the inside of the duct 4 is divided into the fiber accumulation region PT and the fiber re-stacking region RPT by the hanging plate 43, and the fiber stacking region PT In the rotating direction 2X upstream of the rotating drum 2, the hanging body 43 is excessively stacked with the molded body material in a scattering state so as to overflow from the collecting recess 2, and the fiber re-stacking region RPT is lower than the hanging plate 43. Further, on the downstream side in the rotation direction 2X of the rotary cylinder 2, the excess amount of the molded body material accumulated by the fibers is scraped off by the scraping roller 42, and the scraped molded body material fibers are further deposited on the accumulation concave portion 22. The fiber stacking device 1 of the present embodiment is a device that allows the molded body material in a scattering state to overflow from the collecting recess 22 in the inside of the pipe 4 on the upstream side in the rotation direction 2X of the rotating drum 2 with respect to the hanging plate 43. Excess fiber accumulation is carried out, and the molded body material which has been excessively accumulated by the fiber is scraped off by the scraping roller 42, and the scraped body material fiber is re-deposited in the collecting recess 22 in the partitioned space 4S. Furthermore, the fiber stacking apparatus 1 of the present embodiment is a device in which a pair of partition plates 41 and 41 are used to deposit fibers in a scattering state in excess in the accumulation recess 22 corresponding to a pair of points. In the region between the partition plates 41 and 41, the molded body material which has been excessively accumulated by the fiber is scraped off by the scraping roller 42, and the scraped material of the molded body material is re-deposited in the partitioned space 4S for accumulation. The both sides of the portion of the recess 22 where the fibers are excessively accumulated. Next, the transfer roller 5, the vacuum conveyor 6, the cutting device 7, and the like which are included in the fiber stacking device 1 except for the rotary drum 2 and the duct 4 will be described.

The transfer roller 5 includes a cylindrical outer peripheral portion having gas permeability, and receives power from a prime mover such as a motor, and its outer peripheral portion rotates about a horizontal axis. On the inside of the transfer roller 5 (rotation axis) The non-rotating portion of the side is formed with a space E for decompressing the inside. A well-known exhaust device (not shown) such as an intake fan is connected to the space E, and by operating the exhaust device, the space E can be maintained at a negative pressure.

On the outer circumferential surface of the transfer roller 5, a plurality of suction holes communicating with the inside and the outside are formed. The suction holes are made to suck air from the outside to the inside while being maintained in the space E of the negative pressure, and the fiber deposits in the collecting recess 22 smoothly pass from the rotating drum 2 by the suction force. Move to the transfer roller 5.

The vacuum conveyor 6 includes an annular gas permeable belt 63 that is stretched over the driving roller 61 and the driven rollers 62 and 62, and a vacuum box 64 for the conveyor 6 that is disposed between the gas permeable belt 63 and the transfer roller. 5 opposite positions.

The vacuum box 11 on the side of the mesh belt 13 has a box shape including upper and lower surfaces, two side surfaces on the left and right sides, and a back surface, and has an opening portion that opens toward the direction of the rotating cylinder 2. The vacuum box 11 is connected to a known exhaust device (not shown) such as an intake fan via an exhaust pipe (not shown), and the inside of the vacuum box 11 can be maintained at a negative pressure by the operation of the exhaust device. .

The mesh belt 13 is formed by a belt-shaped gas permeable belt having a mesh shape, and is guided by a plurality of free rollers 14 and a transfer roller 5 to continuously move on a specific path. The mesh belt 13 is driven by the rotation of the transfer roller 5. As shown in Fig. 1, the mesh belt 13 is disposed in such a manner as to be introduced into the outer peripheral surface of the rotary cylinder 2 near the end portion of the duct 4 on the side where the scraper roller 42 is disposed, and sequentially passes through the vacuum chamber 11 and rotates. Between the barrels 2 and between the transfer rolls 5 and the rotating drum 2. The mesh belt 13 is in contact with the outer peripheral surface of the rotary cylinder 2 before passing through the opening of the vacuum chamber 11, and moves away from the outer peripheral surface of the rotary cylinder 2 in the vicinity of the closest portion of the transfer roller 5 and the rotary cylinder 2 to Transfer roller 5 is on. The mesh belt 13 has micropores smaller than the suction holes of the transfer roller 5, and also with the suction of the suction holes of the autogenous transfer roller 5, the micropores of the mesh belt 13 overlapping the suction holes. Pumping.

The windshield 15 is provided with a pair of suction holes formed in the width direction of the outer peripheral surface of the transfer roller 5, and a pair is provided on both sides thereof to prevent or reduce the inflow of wind from the side. Further, the shape of the fiber deposits for preventing the self-collecting recess 22 from being released is prevented. The material of the windshield 15 is not particularly limited, and is preferably made of metal or synthetic resin and has a thickness of about 0.5 to 10 mm from the viewpoint of being resistant to wind rigidity.

As the cutting device 7, for example, a person who has previously used for the continuum of the absorbent body in the production of an absorbent article such as a menstrual napkin or a diaper can be used without particular limitation. The cutting device 7 shown in Fig. 1 includes a cutting roller 72 having a cutting blade 71 on its circumferential surface, and an anvil roller 73 which is smooth in the circumferential surface of the cutting blade.

Next, a method of continuously manufacturing an absorber using the above-described fiber stacking device 1 will be described.

The manufacturing method of the absorber using the fiber stacking apparatus 1 includes a fiber stacking step of supplying the molded body material to the rotating drum 2 in a scattering state, thereby depositing the molded body material fibers in the collecting recess 22, the above-described rotation The cylinder 2 has a collecting recess 22 on the outer peripheral surface 21, and has a higher recess 23 as a second region in the central portion of the accumulating recess 22 than in the accumulating recess 22 as the first region.

Before the fiber stacking step is carried out, first, the space A and the space B in the rotary cylinder 2, the space E in the transfer roller 5, and the inside of the vacuum chamber 11 are actuated by the exhaust device connected to each of them. Pressure. By causing the inside of the space A to be a negative pressure, an air flow (vacuum flow) for transporting the absorbent material to the outer peripheral surface 21 of the rotary cylinder 2 is generated in the duct 4. Further, the rotary drum 2 and the transfer roller 5 are rotated to operate the vacuum conveyor 6.

Then, when the molded body material introduction device (not shown) is actuated and the molded body material as the absorbent material is supplied into the duct 4, the molded body material becomes scattered in accordance with the airflow flowing in the duct 4. On the other hand, the outer surface 21 of the rotary cylinder 2 is supplied, and the fibers are deposited on the accumulation recess 22 (fiber stacking step).

In the fiber stacking step, the pair of partition plates 41, 41 are used to deposit the excess amount of the molded body material in the scattering state in the accumulation recess 22 corresponding to the pair of partition plates 41, 41. The area. Specifically, as shown in FIG. 1 , FIG. 4 , and FIG. 6 , In the inside of the duct 4, a pair of partition plates 41, 41 are provided on both sides in the circumferential direction (2X direction) of the rotary cylinder 2, so that it is concentrated in the accumulation recess 22 corresponding to the pair of partition plates 41. Forming the bulk material in a scattered state in a manner of 41. In the fiber stacking apparatus 1 of the present embodiment, the adjustment body 20 having a large opening area is disposed on the inner surface of the high-purpose porous sheet 25 among the high-purpose recessed portions 23 in the central region of the accumulation recessed portion 22. In addition, the adjustment body 20 having a small opening area is disposed on the inner surface of the porous plate 27 disposed in the region of the accumulation concave portion 22 other than the medium-high porosity plate 25. Therefore, the flow of the molded body material through the medium-high porous plate 25 is not suppressed, and the flow of the molded body material through the porous plate 27 is suppressed. Therefore, in the manufacturing method of the absorber using the fiber stacking device 1, the formed body in a scattered state can be concentrated on the region in which the high-purpose recessed portion 23 is located between the pair of partition plates 41 and 41. Material accumulation.

Further, in the fiber stacking device 1 of the present embodiment, the pair of partition plates 41 and 41 are oriented toward each other from the opposite side of the molded body material introduction device (not shown) on the other end side of the duct 4 toward the rotating cylinder. 2, the mutual spacing is gradually narrowed, and the distance between the end portions 41a and 41a on the side of the rotating cylinder 2 of the pair of partition plates 41 and 41 coincides with the width of the high concave portion 23 in the central portion of the collecting concave portion 22. Therefore, in the fiber stacking step of the method of manufacturing the absorbent body using the fiber stacking device 1, it is possible to concentrate on the region in which the high-purpose recessed portion 23 is located among the pair of partition plates 41 and 41. The shaped body material is in agglomerated. Here, if the interval between the end portions 41a and 41a of the pair of partition plates 41 and 41 is set according to the width of the middle-high recess portion 23 (the width of the upper portion of the absorbent body 3 to be formed), the high basis weight ratio can be processed. The absorber. For example, in the case of processing the absorber shown in FIG. 8 below, the width of the portion of the thick portion (middle-high portion) 33 in the width direction and the end portions 41a and 41a of the partition plate can be matched. The absorbent body 3 having a higher basis weight ratio is processed.

Further, in the region in which the middle-high recess portion 23 is located, the middle-high recess portion 23 is intermittently disposed in the circumferential direction (2X direction) of the rotary cylinder 2, so that the portion in which the middle-high recess portion 23 is disposed is smaller than the middle-high recess portion 23 The gathering recess 22 is deeper. Therefore, as shown in Figure 6, Corresponding to the height of the molded body material in the region between the pair of partition plates 41 and 41 in the circumferential direction (2X direction) of the rotary cylinder 2, the fibers are deposited in a region corresponding to the portion where the middle-high recess portion 23 is disposed. It is lower than the height of the molded body material in which the fibers are deposited in a region corresponding to a portion other than the middle-high recess 23 .

Then, after the fiber stacking step, the molded body material in which the excess fiber is deposited is scraped off, and the scraped material of the molded body material is further deposited on both sides of the portion where the excessive fibers are accumulated in the collecting recess 22 ( Fiber re-stacking step). Specifically, the inside of the duct 4 included in the fiber stacking device 1 of the present embodiment is divided into a fiber accumulation region PT and a fiber re-stacking region RPT by the hanging plate 43, and the fiber stacking region PT is separated by a pair of points. The separators 41 and 41 deposit excess fibers in the scattering state in the accumulation recess 22, and the fiber re-distribution region RPT re-deposits the scraped molded material fibers in the accumulation recess 22 . Further, in the space 4S of the fiber re-stacking region RPT partitioned by the hanging plate 43 in the inside of the duct 4, as shown in Figs. 1 and 6, the partition plate 41 is moved away from the downstream side, and the scraped fiber is stacked. A scraping roll 42 of excess molded body material. Therefore, in the fiber re-stacking step, as shown in FIG. 7, the scraper 42 is used to scrape off the molded body material in which the fibers are excessively accumulated. As described above, in the manufacturing method of the absorber using the fiber stacking device 1, in the region corresponding to the pair of partition plates 41, 41 in the circumferential direction (2X direction) of the rotary cylinder 2, the fiber The height of the molded body material deposited in the region corresponding to the portion in which the middle-high recess portion 23 is disposed is lower than the height of the molded body material in which the fibers are deposited in the region corresponding to the portion other than the middle-high recess portion 23, so that the scraper 42 is used to scrape. Forming a region in which the excess fiber having a relatively high height corresponding to the fiber-formed bulk material in the region between the pair of partition plates 41 and 41 is deposited in a region corresponding to a portion other than the middle-high recess portion 23 Body material. In other words, the fiber having a relatively low height of the molded body material which is deposited by the fibers in the region between the pair of partition plates 41 and 41 is deposited on the molded body in the region corresponding to the portion in which the middle-high recess 23 is disposed. The material is not easily scraped by the scraping roller 42.

The scraped shaped body material is in the space 4S of the pipe 4, by hanging down the plate 43 The scattering state returns to the upstream side in the vicinity of the hanging plate 43, and the fibers are further accumulated in the collecting recess 22 . In the fiber stacking device 1 of the present embodiment, a duct opening portion 44 for sucking the outside atmosphere is provided inside the duct 4 on the downstream side of the scraping roller 42 in the rotational direction 2X of the rotary cylinder 2. Therefore, by sucking the outside air through the duct opening portion 44, as shown in FIG. 7, the molded body material scraped by the scraping roller 42 is easily peeled off from the projection 422 of the scraping roller 42. In the fiber stacking device 1 of the present embodiment, the lock plate 441 as the external air amount adjusting mechanism is disposed in the duct opening portion 44, and the opening area of the duct opening portion 44 is adjusted by the lock plate 441. The flow rate (V1) of the outside atmosphere between the scraper roller 42 and the top surface of the duct 4 is adjusted to be faster than the flow rate (V2) of the outside atmosphere between the scraper roller 42 and the rotary cylinder 2. By adjusting in this manner, the molded body material scraped off by the scraping roller 42 is easily peeled off from the projection 422 of the scraping roller 42.

In the collecting recess 22 on the upstream side in the vicinity of the hanging plate 43 in the space 4S of the duct 4, an excessive amount of the molded body material is not scraped by the scraping roller 42. Therefore, compared with the excess fiber accumulation portion, the amount of the formed body material which is accumulated in the fiber along the circumferential direction (2X direction) of the rotating cylinder 2 in the portion where the excessive fiber is accumulated is less and is less likely to be piled up due to the fiber accumulation. The molded body material interferes with the suction force. Therefore, in comparison with the portion where the excessive fibers are accumulated in the concave portion 22 for the accumulation, the molded body material scraped off is easily accumulated in the fiber on both sides of the portion where the excessively accumulated fibers are accumulated in the concave portion 22 for the accumulation. As described above, in the fiber stacking device 1 of the present embodiment, the fibers of the molded body material scraped off by the scraping roller 42 can be re-deposited on the both side portions of the collecting recess 22 in the vicinity, so that the inside of the duct 4 can be The flow of the wind that transports the molded body material is not easily changed, and it is easy to manufacture the absorbent body of the desired basis weight. Further, in the fiber stacking device 1 of the present embodiment, as shown in Fig. 7, the hanging plate 43 is formed in an arc shape in an arc shape from the top surface of the duct 4 toward the rotation direction (R2 direction) of the rotary cylinder 2, and therefore The scraped molded body material is easily guided to the hanging plate 43 to re-distribute the fibers.

Then, in the manufacturing method of the absorber using the fiber stacking device 1, in the space 4S of the duct 4, after the fiber re-stacking step, the fiber stack is again used by the scraper roller 42. The height of the molded body material accumulated in the collecting recess 22 is adjusted to a fixed height (height adjusting step). In the fiber stacking device 1 of the present embodiment, the roller body 421 and the plurality of protrusions 422 of the wiper roller 42 are disposed over the entire width of the rotary cylinder 2, and the height of the projection 422 is set to reach the outermost surface of the rotary cylinder 2. The height of the outer surface 29a of the annular plate 29. Therefore, in the manufacturing method of the absorber using the fiber stacking device 1, the molded body material in which the fibers are accumulated in the collecting recess 22 by the scraping roller 42 can be adjusted to the height of the outer surface 29a of the annular plate 29.

In the above manner, as shown in FIG. 1, the fiber of the molded body material is deposited in the collecting recess 22 to obtain the fiber deposit 32, and then the rotating drum 2 is rotated. Then, when the fiber deposit 32 in the collecting recess 22 reaches the opposite position of the vacuum box 11, it is sucked into the mesh belt 13 by suction from the vacuum box 11, and is transported in this state. It is the closest to the transfer roll 5 and the rotating drum 2 or its vicinity. Then, the fiber deposit 32 adsorbed to the mesh belt 13 is released from the collecting recess 22 by suction from the side of the auto-feeding roller 5, and is transferred to the transfer roller 5 together with the mesh belt 13.

The fiber deposit 32 immediately after being released from the collecting recess 22 in the present embodiment is shown in Fig. 8 . As shown in FIG. 8, the fiber deposit 32 is deeper than the center portion of the accumulation recess 22, and the portion corresponding to the high recess portion 23 is a thick portion 33 having a high height and a recess portion 23 other than the middle height recess portion 23. The portion corresponding to the collecting recess 22 is a thin portion 34 having a low height. Specifically, the height of the thick portion 33 is formed by the thickness of the space plate 26 disposed on the medium-high porosity plate 25, the thickness of the concave portion dividing plate 28, and the thickness of the annular plate 29. Further, the thin portion 34 is formed by the thickness of the concave portion partitioning plate 28 disposed on the porous sheet 27 and the thickness of the annular plate 29.

More specifically, the thick portion 33 is divided into MD division forming members 262 and CD in a lattice-like intersection in a region surrounded by the annular division forming member 261 of the space plate 26 disposed on the middle-high porosity plate 25. The forming member 263 is divided and has a divided thick portion 331. Further, the thin portion 34 is divided by the concave partitioning plate 28 disposed on the porous plate 27. The MD division forming member 285 and the CD division forming member 286 which are intersecting in a lattice shape in the opening division forming portion 284 other than the opening portion 281 of the shape are divided, and have the divided thin portion 341.

Further, in the fiber stacking device 1 of the present embodiment, the inner surface of the high-purpose recessed portion 23 is disposed in the central portion of the accumulating recessed portion 22, and the adjustment body 20 is not disposed. The adjustment body 20 is disposed on the inner surface of the porous plate 27 disposed in the region of the accumulation recess 22 other than the medium-high porosity plate 25. Therefore, the thick portion 33 of the fiber deposit 32 obtained by the method for producing an absorbent body using the fiber stacking device 1 serves as a high basis weight portion in which the fiber accumulation amount of the absorbent material is relatively large, and the thin portion 34 serves as an absorbent body. The low basis weight of the raw material is relatively low in fiber accumulation. Further, the bottom surface of the fiber deposit 32 is substantially flattened by the scraping roller 42.

The fiber deposit 32 transferred onto the transfer roller 5 is conveyed while being sucked by the auto-feeding roller 5 side, and is transferred to the vacuum conveyor 6 disposed under the transfer roller 5 The packaged chip material 37 including toilet paper or liquid permeable non-woven fabric is used. Thereafter, as shown in FIG. 1, both sides of the packaged chip material 37 in the transport direction are folded back, and the upper and lower surfaces of the fiber deposit 32 are covered with the packaged core material 37. Then, the fiber deposit 32 in a state in which the packaged chip material 37 is covered is attached to the core material 37, and the cutting roller 72 of the cutting device 7 is cut in the middle between the adjacent thick portions 33 and 33. Broken. Thus, the absorber 3 covered with the packaged core material 37 can be obtained.

The absorbent body 3 obtained by the method for producing an absorbent body using the fiber stacking device 1 includes a thick portion 33 and a thin portion 34, and is an absorbent body having a highly different height as a molded body material of the absorbent material. By the action of one of the partition plates 41, 41 and the scraper roller 42 disposed in the duct 4, no unevenness in fiber accumulation is observed in the absorber 3, and the absorber 3 serves as a disposable diaper, a menstrual napkin, The absorbent body of an absorbent article such as an incontinence pad is preferably of a high quality. As described above, according to the method of manufacturing the fiber stacking apparatus 1 of the present embodiment, the absorber including the middle portion of the desired height can be stably produced. Again, by The action of the adjusting body 20 causes the thick portion 33 to have a relatively high basis weight, and the thin portion 34 has a relatively low basis weight. As described above, according to the method of manufacturing the fiber stacking apparatus 1 of the present embodiment, it is possible to stably manufacture an absorber including a high portion among the desired basis weights.

The present invention (first invention) is not limited by the fiber stacking device 1 of the above embodiment, and can be appropriately changed.

For example, in the fiber stacking device 1 of the present embodiment, the inside of the duct 4 on the upstream side in the rotation direction (R2 direction) of the rotary cylinder 2 is placed in the circumferential direction (2X direction) of the rotary cylinder 2 from the lowering plate 43. A pair of partition plates 41, 41 are provided on both sides, but they may not be provided. Even if the pair of partition plates 41 and 41 are not provided, in the circumferential direction (2X direction) of the rotary cylinder 2, the height of the molded body material in which the fibers are deposited in the region corresponding to the portion where the middle-high recess portion 23 is disposed is also lower than the fiber stack. The height of the molded body material in the region corresponding to the portion other than the middle-high recess portion 23. In the space 4S of the duct 4, the scraper 42 is used to scrape the molded body material in which the relatively high-level excess fiber of the fiber-formed molded body material is deposited in a region corresponding to the portion other than the middle-high recess portion 23. . As described above, the molded body material scraped off by the scraping roller 42 is easily peeled off from the projection 422 of the scraping roller 42 by the external atmosphere sucked through the duct opening portion 44, and is easily disposed in the space 4S to be separated. The scraped material of the molded body material is further deposited in the collecting recess 22, and the absorbent body including the middle portion of the desired height is stably produced.

Further, in the fiber stacking device 1 of the above-described embodiment, the adjustment body 20 for adjusting the suction force is disposed on the inner surface side of the rotary tube 2 of the porous plate 27 (porous member) in the accumulation concave portion 22, However, the adjustment body 20 for adjusting the suction force may not be disposed in any area. The fiber deposit 32 produced by using the rotary drum 2 is a discrete fiber deposit having a thick portion 33 having a high height and a thin portion 34 having a low height. The thick portion of the discrete fiber deposit is a high basis weight having a relatively high basis weight, and the thin portion is a low basis weight having a relatively low basis weight.

Moreover, the shape of the produced fiber deposit 32 is not limited to the above shape, and may be borrowed By changing the suction adjustment plate 24, the middle-high porosity plate 25, the space plate 26, the porous plate 27, the concave partition plate 28, the pair of annular plates 29, and the like, the arrangement or shape of the accumulation recess 22 can be flexibly changed, and the middle and high The configuration or shape of the recess 23 is used. Further, among the second regions in which the depth of the middle-high recesses 23 is deeper than the first region, the high-pitched portions 23 may be disposed in regions other than the central region of the stacking recess 22 .

Further, as shown in FIG. 3, the rotating cylinder 2 is a plate including a suction adjusting plate 24, a medium-high porous plate 25, a space plate 26, a porous plate 27, a concave partitioning plate 28, and a pair of annular plates 29, but Instead of the plate, for example, a plate in which a portion of the high basis weight portion is to be formed to be deeply recessed may be used. Further, by including a plate including the suction adjusting plate 24, the medium-high porous plate 25, the space plate 26, the porous plate 27, the concave dividing plate 28, and the pair of annular plates 29, high basis weight can be accurately manufactured. Compared to the absorber.

The absorbent body produced in the present invention (first invention) is preferably used as an absorbent body of an absorbent article. The absorbent article is mainly used for absorbing body fluids that are excreted by the body such as urine or menstrual blood. The absorbent article includes, for example, disposable diapers, menstrual sanitary napkins, incontinence pads, sanitary pads, and the like, but is not limited thereto, and broadly includes articles for absorbing liquid discharged from a human body.

Hereinafter, the present invention (second invention) will be described with reference to the drawings based on preferred embodiments thereof.

Fig. 9 shows an outline of a fiber stacking apparatus of the preferred embodiment of the apparatus for producing an absorbent body according to the second aspect of the invention. The fiber stacking device 10 of the present embodiment is a manufacturing apparatus of the absorber 3, and has a rotating drum 2 having a collecting recess 22 on the outer peripheral surface 21, and a duct 4 for squeezing the formed body material toward the rotating drum 2 The outer peripheral surface 21 is supplied; and the absorbent body 3 is molded by depositing the molded body material fibers in the collecting recess 22 by the air flow generated by the suction inside the rotating cylinder 2. Further, the collecting recess 22 has a first region and a second region having a depth deeper than the first region. In the fiber stacking device 10 of the present embodiment, as shown in FIG. 10, the second region of the collecting recess 22 is composed of The central portion of the collecting recess 22 is formed deeper and higher than the collecting recess 22 by the recess 23 . Further, the first region of the collecting recess 22 is formed by the collecting recess 22 other than the high recess 23 in the central region. In other words, the fiber stacking device 10 of the present embodiment includes a rotating cylinder 2 having a collecting recess 22 on the outer peripheral surface 21, and a recessed portion 23 in the central portion of the collecting recess 22, which is deeper than the collecting recess 22; And a duct 4 that supplies the molded body material to the outer peripheral surface 21 of the rotary cylinder 2 in a scattered state. In detail, the fiber stacking device 10 includes a rotating drum 2 that is rotationally driven in the direction of an arrow R2, a duct 4 that supplies a molded body material to the outer peripheral surface 21 of the rotating drum 2, and a transfer roller 5 that is disposed in the rotating drum 2 is obliquely downward and is rotationally driven in the direction of arrow R5; a vacuum conveyor 6 disposed below the transfer roller 5; and a cutting device 7. In the fiber stacking device 10, further, the vacuum box 11 is disposed between the pipe 4 and the transfer roller 5 in the circumferential direction of the rotary drum 2, and the mesh belt 13 is passed between the vacuum box 11 and the rotary drum 2 and the material is fed. The roller 5 is disposed between the roller 5 and the rotary cylinder 2, and the windshield 15 is disposed adjacent to the outer peripheral surface of the transfer roller 5. Further, the fiber stacking device 10 of the present embodiment is provided with the vacuum box 11 and the windshield 15 from the viewpoint of stabilizing the fiber deposit in the collecting recess 22, and the windshield plate 15 is provided. Settings. As shown in Fig. 9, the rotation direction of the rotary cylinder 2 is a rotation direction in the direction of the arrow R2 in the opposite direction with respect to the conveyance direction of the packaged chip material 37 described below, and the rotation direction of the transfer roller 5 is relative to the package chip 37. The conveyance direction is the rotation direction of the arrow R5 in the positive direction.

As shown in Fig. 9, the rotary cylinder 2 is formed in a cylindrical shape and is rotated about a horizontal axis by receiving power from a prime mover such as a motor. As shown in FIG. 10, the rotating cylinder 2 has a collecting recess 22 for the fiber deposited body material on the outer peripheral surface 21, and further has a central portion in the width direction (2Y direction) of the rotating cylinder 2 disposed in the collecting recess 22 Further, the recess 23 is used deeper than the recess 22 for the accumulation. The collecting recess 22 including the middle-high recess 23 is formed in a plurality of predetermined intervals in the circumferential direction (2X direction) of the rotary cylinder 2. In Fig. 10, the 2X direction is the circumferential direction of the rotary cylinder 2, and the 2Y direction is the width direction of the rotary cylinder 2 (the direction parallel to the rotation axis of the rotary cylinder 2).

As shown in Fig. 11, the rotary cylinder 2 has a cylindrical drum body (not shown) including a rigid body made of metal, and a suction adjustment plate 24 which is overlapped and fixed to the outer peripheral portion of the drum body; a porous plate 25 (porous member) which is superposed and fixed to the outer surface 24a side of the suction adjustment plate 24; and a space plate 26 which is overlapped and fixed to the outer surface 25a side of the medium-high porous plate 25; a plate 27 (porous member) which is overlapped and fixed to the outer surface 26a side of the space plate 26; a concave partitioning plate 28 which is overlapped and fixed to the outer surface 27a side of the porous plate 27; and an annular plate 29, It is overlapped and fixed to the outer surface 28a side of the recess dividing plate 28. The rotary cylinder 2 is formed by fixing the drum main body and the respective plates 24 to 29 to each other by a known fixing means such as a bolt or an adhesive. As shown in FIG. 10 and FIG. 11, the bottom surface 23a of the high-purpose recessed portion 23 as the molded body material is composed of a high-purpose porous plate 25 (porous member) having a plurality of suction holes. In addition, the bottom surface 22a of the concave portion 22 for the accumulation of the fiber-forming surface of the molded body material, and the bottom surface 22a of the concave portion 22 for the accumulation other than the portion for the middle-high concave portion 23 is composed of the porous sheet 27.

In addition, in the present specification, each of the constituent members of the rotary cylinder 2 (suction adjustment plate 24, medium-high porous plate 25, space plate 26, porous plate 27, concave portion dividing plate 28, annular plate 29, etc.) The surface is the surface of the constituent member facing the supply side of the molded body material when the fiber is deposited. Moreover, the inner surface of each of the constituent members is a surface on the opposite side (the inner side of the rotary cylinder) from the supply side of the molded body material in the constituent material of the constituent material. In the case where the molded body produced by the fiber stacking device 10 is an absorbent body for an absorbent article such as a disposable diaper or a menstrual napkin, the molded body material is an absorbent body material.

The shaped body material is a fiber material. As the molded body material of the absorbent body raw material, various materials of the absorbent body previously used for absorbent articles such as menstrual sanitary napkins or sanitary pads, disposable diapers, and the like can be used without particular limitation. For example, a short fiber such as a pulp fiber such as a defibrated pulp, a cellulose fiber such as a ray fiber or a cotton fiber, or a synthetic fiber such as polyethylene is used. Fiber, etc. These fiber materials may be used alone or in combination of two or more. Further, as the molded body material of the absorbent material, a water-absorbent polymer may be used together with the use of the fibrous material. Further, as the fibrous raw material, a fibrous water-absorbent polymer may be used alone or in combination with the fibrous material. Further, it is also possible to use a deodorant, an antibacterial agent, or the like while using a fibrous material or the like as needed.

Regarding the annular plate 29, the outer surface 29a is located at the outermost side of the rotating cylinder 2, and is a member that forms a part of the outer peripheral surface 21, and is also a member that forms the outer peripheral surface of the collecting recess 22. Here, the "outer circumferential surface of the collecting recess 22" means that the collecting recess 22 is viewed from the outside in the normal direction of the outer peripheral surface of the rotating cylinder 2 (the direction orthogonal to the rotational axis direction of the rotating cylinder 2). The outer surface of the contour of the recess 22 is used. In the present invention, the operation of observing the object such as the collecting recess 22 from the outer side in the normal direction of the outer peripheral surface of the outer circumference of the rotating cylinder 2 is referred to as an object such as the concave portion 22 for the plan view. In the fiber stacking device 10 of the present embodiment, when the collecting recess 22 is viewed in plan, the collecting recess 22 has a rectangular shape having a long length in the conveying direction, so that the pair of annular plates 29 and 29 are disposed in the rotating drum 2 The side portions, and the annular plates 29 are formed to extend over the entire circumference of the rotating cylinder 2 at the same width. Further, the thickness of each annular plate 29 is formed to be fixed.

In the annular plate 29 formed as described above, the distance between the pair of annular plates 29 and 29 serves as one of the elements for determining the width of the collecting recess 22, and the thickness of the annular plate 29 serves as an element for determining the depth of the collecting recess 22. One. The pair of annular plates 29 and 29 are airtight which does not allow air to pass, except for the portion between them. Here, the term "air impermeability" includes both the meaning of "impermeable property that does not allow air to pass through" and "the incompatibility of a small amount of air but does not substantially pass air", and is substantially not The meaning of breathability. As the annular plate 29, for example, a plate made of a metal such as stainless steel or aluminum or a resin plate may be used to form a plate having an opening (a space portion corresponding to the three-dimensional shape in the concave portion 22) or integrated by using a mold. A plate in which the opening is formed, a plate that is punched, etched, or the like is stacked.

The recessed partitioning plate 28 has a plurality of cross-shaped opening portions 281 which are equal to each other in the thickness direction in plan view, and a cross-shaped opening portion partitioning forming member 282 which is divided into respective cross-shaped opening portions 281; a plurality of opening portions 283 The openings are formed in the thickness direction, and the opening portion forming portion 284 is formed to define the respective opening portions 283. The cross-shaped opening portion 281 is intermittently arranged in plural in the circumferential direction (2X direction). Specifically, the opening division forming member 282 is formed in a cross shape having a portion extending in a strip shape at a fixed interval in the transport direction in a plan view, and a portion extending in the transport direction. A portion in which the central portion is substantially convex from the side edges toward the outer side in the width direction (2Y direction). More specifically, the front and rear ends of the portion extending in the conveying direction of the cross-shaped opening portion dividing member 282 formed in a cross shape are formed in an arc shape which is convexly curved outward. In addition, a portion in which one of the opening-division-dividing members 282 which is formed in a cross shape is formed in a convex shape on the outer side in the width direction (2Y direction) is formed in a trapezoidal shape in which the outer side is gradually shorter in the width direction (2Y direction). The opening portion 281 is located in the cross-shaped opening portion dividing member 282, and is formed in a cross shape having the same contour as the opening portion dividing member 282. In the region other than the plurality of cross-shaped openings 281 (the cross-shaped opening portion forming member 282), the opening portion defining portion 284 has a plurality of MD dividing forming members extending in parallel with the conveying direction. 285, and a plurality of CDs extending in a direction parallel to the width direction (2Y direction) (extending in a direction perpendicular to the transport direction) form a member 286. The opening division forming portion 284 is formed in a lattice shape by a plurality of MD division forming members 285 intersecting the plurality of CD division forming members 286, and each opening 283 is located in a lattice in the lattice-shaped opening division forming portion 284. The portion of the eye is formed to have the same contour as that of each of the opening portion forming portions 284.

The cross-shaped opening division forming member 282 and the opening division forming portion 284 having the MD division forming member 285 and the CD division forming member 286 have airtightness that does not allow air to pass therethrough. The "air impermeability" mentioned herein is as described above. As a material for forming the air-impermeable opening portion forming members 282 and 284, stainless steel, aluminum, iron or the like can be used. A genus, or a resin, or a combination of the materials obtained. The plurality of cross-shaped opening portions 281 and the plurality of opening portions 283 included in the recessed portion partitioning plate 28 are disposed to be overlapped and fixed to a region sandwiched by the pair of annular plates 29 and 29 on the outer surface 28a of the recessed portion dividing plate 28. The thickness of the cross-shaped opening portion forming member 282 and the lattice-shaped opening portion dividing forming portion 284 constituting the concave portion dividing plate 28 is fixed. The thickness of the recessed partitioning plate 28 is also one of the elements determining the depth of the collecting recess 22, similarly to the thickness of the annular plate 29.

The porous plate 27 has a plurality of cross-shaped openings 271 in plan view. The cross-shaped opening portion 271 of the porous plate 27 is disposed at the same position as each of the cross-shaped opening portions 281 of the concave portion dividing plate 28 that is superposed and fixed to the outer surface 27a of the porous plate 27. The plurality of cross-shaped opening portions 271 of the porous plate 27 are in one-to-one correspondence with the plurality of cross-shaped opening portions 281 of the concave portion dividing plate 28, and have a similar relationship in plan view. In the fiber stacking device 10 of the present embodiment, the similarity ratio of the cross-shaped opening portion 271 of the porous plate 27 to the cross-shaped opening portion 281 of the corresponding concave portion dividing plate 28 is 1, the opening portion 271 and the opening portion 281. There is a relationship in which the top shapes are identical to each other.

The porous plate 27 is a member that forms the bottom surface 22a of the collecting recess 22 except for the portion of the middle-high recess 23 . The porous plate 27 is a gas permeable plate that conducts a gas flow (vacuum flow) generated by suction from the inner side of the fiber stacking device 10 (inside of the rotary drum 2) to cover rotation. In the duct 4 of the cylinder 2, the molded body material that is conveyed by the airflow is not transmitted and is held, and only air is transmitted. In the porous plate 27, a plurality of (a plurality of) suction holes (micropores) penetrating the plate 27 in the thickness direction are formed in a uniform distribution in a region other than the plurality of cross-shaped openings 271 for accumulation. While the recessed portion 22 passes through the space in which the inside of the rotating cylinder 2 is maintained at a negative pressure, the suction hole functions as a through hole of the airflow. As the porous plate 27, for example, a mesh plate made of metal or resin, or a plurality of micropores (for a plurality of micropores) formed by etching or punching on a metal or resin plate can be used.

The space plate 26 has an annular partition forming member 261 which is overlapped in plan view. The plurality of MDs are formed to be fixed to the contour of each of the cross-shaped opening portions 271 of the porous plate 27 on the outer surface 26a of the space plate 26; the plurality of MDs are divided to form a member 262 which extends in parallel with the conveying direction; and a plurality of CD divisions The forming member 263 extends in parallel with the width direction (2Y direction) (extending in a direction perpendicular to the conveying direction). The MD division forming member 262 and the CD division forming member 263 not only intersect each other but also intersect the annular division forming member 261 to form a lattice shape. The space plate 26 is formed in a region surrounded by the annular division forming member 261, and has a plurality of annular inner opening portions 264 which are located at the intersection of the MD division forming member 262 and the CD division forming member 263. Part of the eye of the lattice and penetrated in the thickness direction. Further, the space plate 26 is provided in a region other than the annular division forming member 261, and has a plurality of openings 265 which are located in the lattice of the intersection of the MD division forming member 262 and the CD division forming member 263. Part of it and penetrate in the thickness direction.

As described above, the annular partition forming member 261 of the space plate 26 is formed along the contour of each of the cross-shaped opening portions 271 of the porous plates 27 which are fixedly fixed to the outer surface 26a of the space plate 26, and the plurality of the space plates 26 are formed. The annular division forming member 261 has a one-to-one correspondence with the contours of the plurality of cross-shaped opening portions 271 of the porous plate 27, and has a relationship in which the planar shapes are similar to each other. In the fiber stacking device 10 of the present embodiment, the similarity ratio of the contours of the plurality of annular division forming members 261 of the space plate 26 with respect to the cross-shaped opening portion 271 of the corresponding porous plate 27 is one. Therefore, the plan view shape of the annular division forming member 261 is not only identical to the contour of the opening portion 271 of the porous plate 27, but also divided into concave portions which are formed in a congruent relationship with the opening portion 271 of the porous plate 27. The outline of the opening division forming member 282 of the cross-shaped opening portion 281 of the plate 28 also has a relationship with each other.

Further, the plurality of openings 265 of the space plate 26 are in one-to-one correspondence with the plurality of openings 283 of the recessed partitioning plate 28 which are fixed to the outer surface 26a of the space plate 26 via the porous plate 27, and have a shape in a plan view. Similar relationship. In the fiber stacking device 10 of the present embodiment, the opening portion 265 of the space plate 26 partitions the opening portion 283 of the plate 28 with respect to the corresponding recess portion. The similarity ratio is 1, and the opening portion 265 and the opening portion 283 have the same shape in plan view. The thickness of the annular division forming member 261, the MD division forming member 262, and the CD division forming member 263 constituting the space plate 26 is formed to be fixed. The thickness of the space plate 26 is one of the elements that determine the depth of the high-purpose recess 23 in the central region of the accumulation recess 22 .

The annular division forming member 261, the MD division forming member 262, and the CD division forming member 263 of the space plate 26 have airtightness that does not allow air to pass therethrough. The "air impermeability" mentioned herein is as described above. As a material for forming the gas-impermeable ring-dividing member 261, the MD-dividing member 262, and the CD-dividing member 263, a metal such as stainless steel, aluminum, or iron, or a resin, or a combination thereof may be used. .

The medium-high porosity plate 25 is provided in a plurality of shapes in plan view and each formed into a cross shape. Each of the cross-shaped high-and-high-porosity plates 25 is disposed at the same position as each of the annular partition forming members 261 that are fixedly fixed to the space plate 26 of the outer surface 25a of the intermediate-high porous plate 25. The outline of the plurality of cross-shaped high-purpose porous sheets 25 is in one-to-one correspondence with the plurality of annular partition forming members 261 of the space plate 26, and has a relationship in which the planar shapes are similar to each other. In the fiber stacking device 10 of the present embodiment, the similarity ratio of the cross-shaped high-purpose porous plate 25 to the annular partition forming member 261 of the corresponding space plate 26 is one. Therefore, the cross-shaped medium-high porosity plate 25 has a congruent relationship with the annular partition forming member 261, and has an overall shape and a cross shape of the opening portion 271 of the porous plate 27 and the concave portion dividing plate 28. The opening portion 281 also has a relationship in which the top view shapes are identical.

The medium-high porous plate 25 is a member that forms the bottom surface 23a of the middle-high recess 23 . In the same manner as the porous sheet 27, the medium-high porous sheet 25 is a gas permeable sheet which is formed by suction from the inner side of the fiber stacking device 10 (inside of the rotary drum 2). The (vacuum flow) is conducted into the duct 4 covering the rotary cylinder 2, and the molded body material that is conveyed by the airflow is not transmitted, and only air is transmitted. In the medium-high porous plate 25, a plurality of (a plurality of) suction holes (micropores) which penetrate the plate 25 in the thickness direction are formed in a uniform distribution, and the high-concave recess 23 is rotated in the accumulation recess 22 Tube 2 While the inside is maintained in a space of negative pressure, the suction hole functions as a transmission hole of the airflow. As the medium-high porosity plate 25, for example, a mesh plate made of metal or resin, or a plurality of micropores formed of a metal or resin plate by etching or punching can be used.

The suction adjustment plate 24 has an annular division forming member 241 which is formed to be contoured in a cross shape which is fixed to the outer surface 24a of the suction adjustment plate 24 in a plan view, and has a contour of the high-purpose porous plate 25; The strip MD division forming member 242 extends in parallel with the conveyance direction, and a plurality of CD division forming members 243 which extend in parallel with the width direction (2Y direction) (extending in a direction perpendicular to the conveyance direction). The MD division forming member 242 and the CD division forming member 243 not only intersect each other but also intersect the annular division forming member 241 to form a lattice shape. The suction adjustment plate 24 is in a region surrounded by the annular division forming member 241, and has a plurality of annular inner opening portions 244 which are located in the MD division forming member 242 and the CD division forming member. A portion of the eye of the 243 crossed lattice and penetrated in the thickness direction. The plurality of annular inner opening portions 244 of the suction adjusting plate 24 are a plurality of annular inner opening portions 264 that are fixed to the space plate 26 on the outer surface 24a of the suction adjusting plate 24 via the medium-high porous plate 25. One-to-one correspondence, and there is a relationship in which the top views are similar to each other. In the fiber stacking device 10 of the present embodiment, the similarity ratio of the annular inner opening portion 244 of the suction adjusting plate 24 to the annular inner opening portion 264 of the corresponding space plate 26 is 1, and the annular inner opening portion 244 is The annular inner opening portion 264 has a relationship in which the planar shapes are identical to each other.

The suction adjustment plate 24 is provided in a region other than the annular division forming member 241, and has a plurality of openings 245 which are located in the lattice of the grid in which the MD division forming member 242 and the CD division forming member 243 intersect. Part of it, and penetrates in the thickness direction. The plurality of openings 245 of the suction adjustment plate 24 are in one-to-one correspondence with the plurality of openings 265 of the space plate 26 that are fixed to the outer surface 24a of the suction adjustment plate 24 by the medium-high porosity plate 25, and are present. The relationship between the shapes looks similar to each other. Fiber stacking device of the present embodiment In 10, the similarity ratio of the opening portion 245 of the suction adjusting plate 24 to the opening portion 265 of the corresponding space plate 26 is less than 1, and the similarity is preferably 0.05 or more and 0.5 or less. That is, the opening area of the opening portion 245 of the suction adjusting plate 24 is smaller than the opening area of the opening portion 265 of the space plate 26. The ratio (S2/S1) of the opening area (S2) of the opening 245 of the suction adjusting plate 24 to the opening area (S1) of the opening 265 of the space plate 26 is preferably 50% or more and 5% or less. Preferably, it is 15% or more and 7% or less.

The thickness of the annular division forming member 241, the MD division forming member 242, and the CD division forming member 243 constituting the suction adjustment plate 24 is formed to be fixed. The annular division forming member 241, the MD division forming member 242, and the CD division forming member 243 of the suction adjustment plate 24 have airtightness that does not allow air to pass therethrough. The "air impermeability" mentioned herein is as described above. As a material for forming the gas-impermeable ring-dividing member 241, the MD-dividing member 242, and the CD-dividing member 243, a metal such as stainless steel, aluminum, or iron, or a resin, or a combination thereof may be used. .

The rotary cylinder 2 is a suction adjustment plate 24, a plurality of medium-high porous plates 25, a space plate 26, a porous plate 27, a concave partition plate 28, and a pair of annular plates which are configured as described above by a known fixing means. 29 is formed by mutual fixation. As shown in FIG. 10, the rotating cylinder 2 included in the fiber stacking device 10 of the present embodiment configured as described above is disposed on the inner surface side of the porous member of the collecting recess 22, and the adjusting body 20 for adjusting the suction force is overlapped. Disposed on the inner surface of the porous member. The adjustment body 20 has a plurality of openings that penetrate the adjustment body 20 in the thickness direction, and one of the openings is a portion of the opening portion that is relatively far from the porous member of the accumulation recess 22 and is relatively close to one of the openings. The opening area is smaller than that of the part. The adjustment body 20 for adjusting the suction force is not disposed on the inner surface side of the porous member of the middle-high concave portion 23, and the suction hole (microporous) of the porous member is the opening area on the outer surface side and the opening on the inner surface side. The area is the same. Specifically, the opening area of the opening portion of the middle-high recess portion 23 disposed on the outer surface side of the porous member is the same as the opening area of the opening portion disposed on the inner surface side of the porous member. Hereinafter, it demonstrates concretely.

The high-purpose recessed portion 23 formed in the collecting recess 22 formed on the outer surface 21 of the rotating cylinder 2 is formed into a member 241 in the annular shape of the suction adjusting plate 24 in a plan view as shown in FIG. The contour of the porous plate 25, the annular partition forming member 261 of the space plate 26, the contour of the opening portion 271 of the porous plate 27, and the position of the opening portion dividing member 282 of the concave portion dividing plate 28 are formed in a cross shape. . Further, in the high-convex recess 23 of the accumulating recess 22, the bottom surface 23a is formed of a medium-high porous plate 25 (porous member), and in the region of the middle-high recess 23, as shown in FIG. The plurality of annular inner opening portions 244 of the suction adjusting plate 24 sandwiching the middle and high-purpose porous plates 25 coincide with the positions and shapes of the plurality of annular inner opening portions 264 of the space plate 26. In this way, the porous adjustment plate 25 (porous member) is disposed on the inner side of the rotating cylinder 2, and the suction adjustment plate 24 is disposed on the bottom surface 23a of the intermediate portion 23a. The opening area of the annular inner opening portion 264 of the space plate 26 on the outer surface side is the same as the opening area of the annular inner opening portion 244 of the suction adjusting plate 24 disposed on the inner surface side of the medium-high porous plate 25. Therefore, in the accumulation recessed portion 22, the inner surface side of the high-purpose recessed portion 23 among the high-purpose recessed portions 23 is not disposed with the adjustment body 20 for adjusting the suction force. Further, as shown in FIG. 12, the high-purpose concave portion 23 of the accumulation concave portion 22 is formed by the thickness of the space plate 26 disposed on the medium-high porous plate 25, the thickness of the concave portion dividing plate 28, and the annular plate 29. Formed by thickness.

As shown in FIG. 10, the collecting recess 22 formed on the outer surface 21 of the rotary cylinder 2 is formed in a strip shape by sandwiching a pair of rectangular annular plates 29 and 29 in plan view. Further, the bottom surface 22a of the region other than the middle-high recess portion 23 is composed of the porous plate 27 (porous member), and the region other than the middle-high recess portion 23 is as shown in FIG. When the plurality of openings 283 of the recessed portion dividing plate 28 coincide with the positions and shapes of the plurality of openings 265 of the space plate 26, the openings are disposed at positions close to the centers of the openings 283 and 265. The opening portion 245 of the suction adjustment plate 24 is smaller in area. That is, the opening area of the opening portion 245 of the suction adjusting plate 24 is smaller than the recess dividing plate 28 The opening area of each of the opening 283 and the opening 265 of the space plate 26 is the same. In this manner, the porous plate 27 (porous member) constituting the bottom surface 22a of the region other than the middle-high recess portion 23 of the concave portion 22 for the accumulation is further disposed inside the rotary cylinder 2, and the space plate 26 and the suction adjustment plate 24 are disposed. The opening portion 245 of the suction adjustment plate 24, which is one of the relatively far distances from the porous plate 27 (porous member), has a smaller opening area than the opening portion 265 of the space plate 26 which is relatively close to one another. The adjustment body 20 for adjusting the suction force is disposed on the inner surface side of the porous plate 27 (porous member) in the region other than the middle-high concave portion 23 of the concave portion 22 for the accumulation. Further, as shown in FIG. 12, the depth of the concave portion 22 for accumulation (excluding the concave portion 23 for the middle height) is formed by the thickness of the concave portion partitioning plate 28 disposed on the porous sheet 27 and the thickness of the annular plate 29.

When the adjustment body 20 is disposed on the inner surface side of the porous plate 27 (porous member) in the region other than the middle-high concave portion 23 of the concave portion 22 for the accumulation, the high-purpose porous plate 25 is used as the middle-high concave portion 23. In the case where the adjustment body 20 is not disposed on the inner surface side of the (porous member), it is possible to suppress the air flow (vacuum flow) which draws the molded body material through the porous member by suction from the inner side of the device. . That is, as shown in FIG. 13, the airflow (indicated by an arrow in FIG. 13) which passes through the porous plate 27 and flows inward from the outer side of the rotating cylinder 2 is attached to the region of the bottom of the recess 22 where the adjusting body 20 is disposed, in accordance with The order of the porous plate 27, the opening 265 of the space plate 26, and the opening 245 of the suction adjusting plate 24 passes through the respective constituent members of the rotating cylinder 2. At this time, with respect to the air flow, the opening portion 245 of the suction adjusting plate 24 that functions as the suction portion of the molded body material and which is located below the air flow, is located above the air flow portion of the opening portion 245. Since the opening area 265 of the space plate 26 has a smaller opening area, the gas permeability through the porous plate 27 is hindered, and the air flow amount of the air flow can be suppressed.

In the fiber stacking step of sucking the molded body material supplied with the airflow to the collecting recess 22 and depositing the fibers, the basis weight of the molded body material depends on the amount of air flowing through the porous member. Therefore, by arranging the adjustment body 20 on the inner surface side of the porous member and the region corresponding to the portion of the molded body material to which the fiber is to be deposited is smaller than the other portions, it is possible to manufacture the desired device by simple equipment. Forming the basis weight of the part body. In other words, since the adjustment body 20 is disposed on the inner surface side of the region other than the middle-high concave portion 23 of the concave portion 22 for the accumulation, the low-weight fiber accumulation region is included, and the high-purpose concave portion 23 of the accumulation concave portion 22 is not on the inner surface side. Since the adjustment body 20 is disposed, it becomes a high basis weight fiber accumulation region.

When the fiber stacking device 10 of the present embodiment is further described, as shown in FIG. 9, the inner side (rotational axis side) of the rotary cylinder 2 is formed to be spaced apart from each other in the circumferential direction (2X direction) of the rotary cylinder 2 Get space B, C and D. A known exhaust device (not shown) such as an intake fan is connected to the space B, and the space B can be maintained at a negative pressure by operating the exhaust device. In the space C, the outside air flows into the outside by the suction from the vacuum chamber 11 side described below, and the outside air flows into the space D by the suction of the self-propagating roller 5 side. In order to perform the transfer in the space C (the transfer of the fiber deposit in the accumulation recess 22 to the transfer roller 5 or the like), the space C is separated from the space D which is the area after the transfer. The rotating drum 2 may have a jet from the inside of the rotating drum 2 toward the porous plate 27 in a space (space C) corresponding to the transfer position of the fiber deposit in the collecting recess 22 to the transfer roller 5 ( Air flow) generation mechanism. In this case, by actively ejecting from the space C toward the vacuum box 11 by using the generating mechanism, it is possible to promote the release of the fiber deposit from the collecting recess 22 . Further, with respect to the rotary cylinder 2, one end of the rotation shaft in the axial direction is blocked by a plate that rotates integrally with the rotary cylinder 2, and the other end is hermetically sealed by the unrotated plate. Further, the above-described spaces B to D are separated from each other by a plate provided from the rotating shaft side of the rotating drum 2 toward the inner surface of the rotating drum 2.

Furthermore, the space C is usually set to a negative pressure or zero pressure (atmospheric pressure) which is weaker than the space B. Before transferring the fibrous deposit in the collecting recess 22 to the transfer roller 5, it is preferable to make the space C a weak negative pressure from the viewpoint of the transportability of the fibrous deposit. The fiber deposit is sucked and held in the collecting recess 22, but if the conveying property is not particularly problematic, the transfer property is considered, and the space C is preferably zero pressure. Further, since the space D is a region where the fiber deposit in the accumulation recess 22 is transferred to the transfer roller 5 and the accumulation recess 22 passes, it is preferably zero pressure or positive pressure.

As shown in Fig. 9, the pipe 4 has one end side on the space B of the rotary cylinder 2 and covers the outer peripheral surface of the rotary cylinder 2 over the entire area of the space B, and has a molded body material on the other end side not shown. Introducing device (not shown). The molded body material introducing device includes, for example, a pulverizer that pulverizes the sheet-like wood pulp to obtain a defibrated pulp, and feeds the defibrated pulp (fiber material) into the pipe 4. A water-absorbent polymer introduction portion into which particles of the water-absorbent polymer are introduced may be provided in the middle of the duct 4.

Each of the accumulation recesses 22 of the rotary cylinder 2 is sucked from the suction portion via the porous plate 27 and the medium-high porous plate 25 constituting the bottom surfaces 22a and 23a while being held in the space B where the negative pressure is maintained. . The suction of the raw material of the absorbent body to the outer peripheral surface of the rotary cylinder 2 is generated in the duct 4 by the suction of the micropores of the porous material of the recess 22 for each accumulation, and the raw materials transported with the airflow are deposited in each The inside of the collecting recess 22 is used.

As shown in Fig. 9, inside the duct 4, partition plates 41 and 41 and scraper rollers 42 are provided, and the partition plates 41 and 41 are arranged along the circumferential direction (2X direction) of the rotary cylinder 2 The scraper roller 42 is disposed so as to be away from the downstream side of the rotating plate 2 in the rotation direction (R2 direction) of the rotating plate 2, and the surface is in contact with the molded material, and scrape the excess amount of the molded body material of the fiber. Hereinafter, it demonstrates concretely.

The pair of partition plates 41, 41 extend along both sides of the rotating cylinder 2 in the circumferential direction (2X direction). Further, the pair of partition plates 41 and 41 are formed by depositing the fibers in the scattering state in the scattering recessed portion 22 so that the fibers are excessively accumulated in the collecting recess 22 and the pair of partition plates 41 and 41. The corresponding areas are arranged at intervals. Specifically, the pair of partition plates 41 and 41 are disposed inside the duct 4, and are disposed between the rotating drum 2 and the molded body material introducing device (not shown) on the other end side of the duct 4 and form the rotating drum 2 One of the outer peripheral faces 21 extends on the annular plates 29, 29 and along the annular plate 29 in the circumferential direction (2X direction). Further, each of the partition plates 41 is in the drum width direction (2Y direction), and as shown in FIG. 12, each of the side walls 40 constituting the duct 4 extends over the annular plate 29 to cover the rotating drum 2 when viewed in cross section. The position of the side of the concave portion 22 in the circumferential direction (2X direction). If further Specifically, each of the partition plates 41 extends from the side wall 40 constituting the duct 4 over the annular plate 29 to the circumferential direction (2X direction) of the high-purpose recessed portion 23 disposed in the central portion of the collecting recess 22 of the rotating drum 2 Near the side edge. If the pair of partition plates 41 and 41 are extended to these positions, they may be plate-like members extending in parallel with the drum width direction (2Y direction), but preferably have the other end side from the pipe 4 The side of the molded body material introduction device (not shown) is inclined so that the interval between the rotating cylinders 2 is gradually narrowed. When the pair of partition plates 41 and 41 have such an inclined surface, the molded body material is less likely to be deposited on the partition plate 41.

As the face having the above-described inclination, in the fiber stacking device 10 of the present embodiment, as shown in Figs. 9 and 12, each of the partition plates 41 has a substantially right-angled triangular cross section, or the upper and lower bottoms are compared with the lower base. The pyramidal trapezoidal shape of the narrow trapezoidal profile. One of the trapezoidal trapezoidal shapes is formed by separating the partition plates 41 and 41 from each other on the other end side of the duct 4 so as to be spaced apart from each other in the drum width direction (2Y direction). The side faces toward the rotary cylinder 2 so as to be inclined so as to gradually narrow each other, and the end portions 41a and 41a of the pair of partition plates 41 and 41 on the side of the rotary cylinder 2 are spaced apart from each other and the middle portion of the concave portion 22 for accumulation. The width of the recess 23 is uniform. Further, as shown in Fig. 12, the lower ends 41d, 41d of the pair of partition plates 41, 41 closest to the rotating cylinder 2 are extended from the side wall constituting the duct 4 to the covering when viewed in a cross section in the direction of the rotation axis of the rotating cylinder 2. The position of the side portion in the circumferential direction (2X direction) of the concave portion 22 for the accumulation. That is, each of the partition plates 41 is formed in contact with the side wall constituting the duct 4. As a material for forming the partitioning plate 41, a metal or a synthetic resin, a material obtained by combining the same, or the like can be used.

As shown in FIGS. 9 and 14, the scraper roller 42 is disposed inside the duct 4, and is disposed on the outer peripheral surface 21 of the rotary cylinder 2 so as to be in contact with the molded body material. Further, the scraping roller 42 is disposed inside the duct 4, and is disposed at a position away from the pair of partition plates 41, 41 toward the downstream side in the rotational direction (R2 direction) of the rotary cylinder 2, so as to scrape the fibers and deposit them with a pair of points. An excess amount of the shaped body material in the region corresponding to the partitions 41, 41, and the shaped body material fiber to be scraped Further, it is deposited on both side portions of the portion where the excessive fibers are accumulated in the accumulation recess 22. Specifically, the scraping roller 42 includes a cylindrical roller body 421 and a plurality of protrusions 422 for scraping which are erected on the outer peripheral surface of the roller body 421. The scraper roller 42 is preferably disposed in the drum width direction (2Y direction), and the roller body 421 is disposed over the entire width of the rotating cylinder 2 on the pair of annular plates 29 and 29, and the plurality of projections 422 are disposed at least in the collecting recess. The region on the high-receiving recess 23 in the central region is preferably disposed in a region between the pair of annular plates 29 and 29, and is preferably disposed over the entire width of the scraper roller 42. In the fiber stacking device 10 of the present embodiment, the roller body 421 and the plurality of protrusions 422 are disposed over the entire width of the rotating cylinder 2. The scraping roller 42 is formed by scraping the excess amount of the molded body material which is accumulated in the accumulation recessed portion 22 by the projections 422. As a material for forming the protrusions 422, a metal such as stainless steel, aluminum, or iron, or a synthetic resin can be used. In the fiber stacking device 10 of the present embodiment, a brush made of stainless steel is used. The height of the projections 422 can be appropriately set according to the amount of the molded body material to be scraped. However, in the fiber stacking device 10 of the present embodiment, the outer surface 29a of the annular plate 29 which reaches the outermost surface forming the rotary cylinder 2 is set. The height so far. Specifically, the height of the projection 422 is preferably about 1 mm to 10 mm from the circumferential surface of the roller body 421 of the scraping roller 42, and particularly preferably about 4 mm to 6 mm.

The scraper roller 42 receives power from a prime mover such as a motor and rotates about a horizontal axis. In the fiber stacking device 10 of the present embodiment, the scraping roller 42 is rotationally driven in the direction of the arrow R3, and is rotated so as to face the rotating cylinder 2 in a direction opposite to the direction of rotation of the rotating drum 2. That is, in the fiber stacking device 10 of the present embodiment, the scraping roller 42 is rotated in the same direction as the rotating drum 2. The peripheral speed of the scraping roller 42 is preferably twice as large as the peripheral speed of the rotating drum 2 from the viewpoint of the balance between the amount of the formed body material and the re-stacking of the scraped formed body material in the vicinity. The above is 10 times or less, and more preferably 3 times or more and 5 times or less. That is, if the peripheral speed of the scraping roller 42 is faster than the peripheral speed of the rotary cylinder 2 as described above, the projection 422 of the scraping roller 42 comes into contact with the excessive amount of the molded body material which is accumulated in the accumulation recess 22 by the fiber. The number of times is increased, and the portion other than the concave portion 23 for the middle height can be used. The excess amount of the molded body material in the collecting recess 22 is scraped off. Further, the peripheral speed of the scraper roller 42 means the circumferential speed on the surface of the roller body 421, and the peripheral speed of the rotary cylinder 2 means the circumferential speed on the surface of the annular plate 29 which forms the outer peripheral surface 21 of the rotary cylinder 2.

Further, as shown in Figs. 9 and 14, in the inside of the duct 4 of the fiber stacking device 10 of the present embodiment, the pair of partition plates 41, 41 and the scraper roller 42 are suspended from the top surface of the duct 4. The plate 43 is lowered. Then, the inner portion of the duct 4 is broken by the hanging plate 43 into the fiber accumulation region PT on the upstream side in the rotation direction (R2 direction) and the fiber re-stacking region RPT on the downstream side in the rotation direction (R2 direction). Here, the fiber accumulation region PT in the inside of the duct 4 is a region in which the molded body material in the scattering state is excessively accumulated in the fiber so as to overflow from the collecting recess 22 . In addition, the fiber re-depositing region RPT in the inside of the duct 4 means that the molded body material which has been excessively accumulated by the fiber is scraped by the scraping roller 42, and the scraped molded material fiber is re-deposited in the collecting recess 22 The area on both sides of the part where the ground fiber is stacked. Specifically, the hanging plate 43 is formed in an arc shape that protrudes from the upstream side of the pipe 4 toward the circumferential direction (2X direction) of the rotating drum 2 over the entire width of the duct 4. The front end of the hanging plate 43 is lowered to a position where it does not come into contact with the top of the molded body material in an excessive amount of fiber accumulation in an overflow manner. By arranging such a hanging plate 43, the scraping rolls 42 are separated inside the duct 4. When such a hanging plate 43 is disposed, the fiber accumulation region (the region where the defibrated molded body material fibers are deposited on the surface of the rotating cylinder 2) and the fiber re-depositing region (which will be scraped by the scraping roller 42) can be used. The region where the fibers of the formed body material are re-deposited is broken, and the fiber accumulation of the molded body material corresponding to the region between the pair of partition plates 41 and 41 existing in the collecting recess 22 of the fiber accumulation region is not easily hindered.

The fiber stacking device 10 of the present embodiment having the rotating drum 2 and the duct 4 configured as described above is an apparatus in which a pair of partition plates 41 and 41 are used to excessively deposit the molded body material in a scattered state. In the region of the converging recess 22 corresponding to the pair of partition plates 41, 41, the excess amount of the molded body material is scraped by the scraping roller 42 to scrape the formed body fiber Re-deposited in the collecting recess 22 Both sides of the portion where the fiber is excessively accumulated. The transfer roller 5, the vacuum conveyor 6, the cutting device 7, and the like which are included in the fiber stacking device 10, except for the rotary drum 2 and the duct 4, will be described.

The transfer roller 5 includes a cylindrical outer peripheral portion having gas permeability, and receives power from a prime mover such as a motor, and its outer peripheral portion rotates about a horizontal axis. A non-rotating portion on the inner side (rotational axis side) of the transfer roller 5 is formed with a space E for decompressing the inside. A well-known exhaust device (not shown) such as an intake fan is connected to the space E, and by operating the exhaust device, the space E can be maintained at a negative pressure.

On the outer circumferential surface of the transfer roller 5, a plurality of suction holes communicating with the inside and the outside are formed. The suction holes are made to suck air from the outside to the inside while being maintained in the space E of the negative pressure, and the fiber deposits in the collecting recess 22 smoothly pass from the rotating drum 2 by the suction force. Move to the transfer roller 5.

The vacuum conveyor 6 includes an annular gas permeable belt 63 that is stretched over the driving roller 61 and the driven rollers 62 and 62, and a vacuum box 64 for the conveyor 6 that is disposed between the gas permeable belt 63 and the transfer roller. 5 opposite positions.

The vacuum box 11 on the side of the mesh belt 13 has a box shape including upper and lower surfaces, two side surfaces on the left and right sides, and a back surface, and has an opening portion that opens toward the direction of the rotating cylinder 2. The vacuum box 11 is connected to a known exhaust device (not shown) such as an intake fan via an exhaust pipe (not shown), and the inside of the vacuum box 11 can be maintained negative by the operation of the exhaust device. Pressure.

The mesh belt 13 is formed by a belt-shaped gas permeable belt having a mesh shape, and is guided by a plurality of free rollers 14 and a transfer roller 5 to continuously move on a specific path. The mesh belt 13 is driven by the rotation of the transfer roller 5. As shown in Fig. 9, the mesh belt 13 is disposed in such a manner as to be introduced into the outer peripheral surface of the rotary cylinder 2 near the end portion of the duct 4 on the side where the scraper roller 42 is disposed, and sequentially passes through the vacuum chamber 11 and rotates. Between the barrels 2 and between the transfer rolls 5 and the rotating drum 2. The mesh belt 13 is in contact with the outer peripheral surface of the rotary cylinder 2 before passing through the opening of the vacuum chamber 11, and moves away from the outer peripheral surface of the rotary cylinder 2 in the vicinity of the closest portion of the transfer roller 5 and the rotary cylinder 2 to Transfer roller 5 is on. The mesh belt 13 has a smaller size than the above-mentioned suction holes of the transfer roller 5. The micropores are also sucked by the micropores of the mesh belt 13 overlapping the suction holes with the suction of the suction holes of the autogenous transfer rolls 5.

The windshield 15 is provided with a pair of suction holes formed in the width direction of the outer peripheral surface of the transfer roller 5, and a pair is provided on both sides thereof to prevent or reduce the inflow of wind from the side, thereby preventing self-concentration. The shape of the fiber deposits in which the recess 22 is demolded, and the like. The material of the windshield 15 is not particularly limited, and is preferably made of metal or synthetic resin and has a thickness of about 0.5 to 10 mm from the viewpoint of being resistant to wind rigidity.

As the cutting device 7, for example, a person who has previously used for the continuum of the absorbent body in the production of an absorbent article such as a menstrual napkin or a diaper can be used without particular limitation. The cutting device 7 shown in Fig. 9 includes a cutting roller 72 having a cutting blade 71 on its circumferential surface, and an anvil roller 73 which is smooth in the circumferential surface of the cutting blade.

Next, a method of continuously producing an absorbent body using the above-described fiber stacking device 10, that is, an embodiment of a method for producing an absorbent body according to the present invention (second invention) will be described.

The manufacturing method of the present embodiment includes a fiber stacking step of supplying the molded body material to the rotating drum 2 in a scattering state, and depositing the molded body material fibers in the collecting recess 22, wherein the rotating drum 2 is attached to The outer peripheral surface 21 has a collecting recess 22, and the central portion of the collecting recess 22 has a higher recess 23 as a second region than the collecting recess 22 as the first region.

Before the fiber stacking step is carried out, first, the space B in the rotary cylinder 2, the space E in the transfer roller 5, and the inside of the vacuum chamber 11 are actuated by the exhaust device connected to each of them to become a negative pressure. By causing the inside of the space B to be a negative pressure, an air flow (vacuum flow) for transporting the absorbent body material to the outer peripheral surface 21 of the rotary cylinder 2 is generated in the duct 4. Further, the rotary drum 2 and the transfer roller 5 are rotated to operate the vacuum conveyor 6.

Then, when the molded body material introduction device (not shown) is actuated and the molded body material as the absorbent material is supplied into the duct 4, the molded body material becomes scattered in accordance with the airflow flowing in the duct 4. And supplied to the outer peripheral surface 21 of the rotary cylinder 2, and the fiber pile It is accumulated in the collecting recess 22 (fiber stacking step).

In the fiber stacking step, in the fiber stacking region PT, the pair of partition plates 41 and 41 are used to deposit the excess amount of the molded body material in the scattering state in the accumulation recess 22 corresponding to the pair of partitions. The area between the plates 41, 41. Specifically, as shown in FIGS. 9 , 12 , and 14 , a pair of partition plates 41 and 41 are provided on both sides of the rotating cylinder 2 in the circumferential direction (2X direction) inside the duct 4, so that The formed body material in a scattered state is concentrated in such a manner as to correspond to a region between the pair of partition plates 41, 41 in the collecting recess portion 22. In the fiber stacking device 10 of the present embodiment, the inner surface of the high-purpose concave portion 23 is disposed in the central portion of the accumulation concave portion 22, and the adjustment body 20 is not disposed. In addition, the adjustment body 20 is disposed on the inner surface of the porous plate 27 disposed in the region of the accumulation recess 22 other than the intermediate-high porosity plate 25. Therefore, the flow of the molded body material through the medium-high porous plate 25 is not suppressed, and the flow of the molded body material through the porous plate 27 is suppressed. Therefore, in the present embodiment, the molded body material in a scattered state can be collected by focusing on the region in which the high concave portion 23 is located between the pair of partition plates 41 and 41.

Further, in the fiber stacking device 10 of the present embodiment, the pair of partition plates 41 and 41 are oriented toward each other from the opposite side of the molded body material introduction device (not shown) on the other end side of the duct 4 toward the rotating cylinder. 2, the mutual spacing is gradually narrowed, and the distance between the end portions 41a and 41a on the side of the rotating cylinder 2 of the pair of partition plates 41 and 41 coincides with the width of the high concave portion 23 in the central portion of the collecting concave portion 22. Therefore, in the fiber stacking step of the present embodiment, the molded body material in a scattered state can be collected by focusing on the region in which the high recess portion 23 is located between the pair of partition plates 41 and 41. Here, if the interval between the end portions 41a and 41a of the pair of partition plates 41 and 41 is set according to the width of the middle-high recess portion 23 (the width of the upper portion of the absorbent body 3 to be formed), the high basis weight ratio can be processed. The absorber. For example, in the case of processing the absorber shown in Fig. 16 below, the width of the portion of the thick portion (middle-high portion) 33 in the width direction and the end portions 41a and 41a of the partition plate can be matched. In combination, the absorbent body 3 having a higher basis weight ratio is processed.

Further, in the region in which the middle-high recess portion 23 is located, the middle-high recess portion 23 is intermittently disposed in the circumferential direction (2X direction) of the rotary cylinder 2, so that the portion in which the middle-high recess portion 23 is disposed is smaller than the middle-high recess portion 23 The gathering recess 22 is deeper. Therefore, as shown in FIG. 14, the fiber is deposited in the circumferential direction (2X direction) of the rotary cylinder 2 in the region corresponding to the pair of partition plates 41 and 41, and corresponds to the portion in which the middle-high recess 23 is disposed. The height of the molded body material in the region is lower than the height of the molded body material in which the fibers are deposited in a region corresponding to the portion other than the middle-high recess portion 23.

Then, after the fiber stacking step, the molded body material in which the excess fiber is deposited is scraped off, and the scraped material of the molded body material is further deposited on both sides of the portion where the excessive fibers are accumulated in the collecting recess 22 ( Fiber re-stacking step). More specifically, as shown in FIG. 9 and FIG. 14 , the inside of the duct 4 is separated from the partition plate 41 toward the downstream side, and a scraping roller 42 that scrapes off the excess amount of the molded body material accumulated by the fibers is provided. Therefore, in the fiber re-stacking step, as shown in FIG. 15, the molded body material in which the fibers are excessively accumulated is scraped off using the doctor roll 42. As described above, in the present embodiment, in the region corresponding to the pair of partition plates 41 and 41, in the circumferential direction (2X direction) of the rotary cylinder 2, the fibers are stacked and arranged in the middle. The height of the molded body material in the region corresponding to the portion of the concave portion 23 is lower than the height of the molded body material in which the fiber is deposited in the region corresponding to the portion other than the middle-high concave portion 23, so that the scraper 42 is used to scrape the corresponding pair of partitions. In the region between the plates 41 and 41, the excess fibers having a relatively high height of the molded body material deposited by the fibers are deposited on the molded body material in a region corresponding to the portion other than the middle-high recess portion 23. In other words, the fiber having a relatively low height of the molded body material which is deposited by the fibers in the region between the pair of partition plates 41 and 41 is deposited on the molded body in the region corresponding to the portion in which the middle-high recess 23 is disposed. The material is not easily scraped by the scraping roller 42.

The scraped molded body material is returned to the upstream side in the vicinity of the fiber re-depositing region RPT in the duct 4, and the fibers are further deposited in the collecting recess 22 . Nearby In the accumulation recess 22 on the upstream side, a state in which an excess amount of the molded body material has not been scraped by the scraper roller 42 is obtained. Therefore, compared with the excess fiber accumulation portion, the amount of the formed body material which is accumulated in the fiber along the circumferential direction (2X direction) of the rotating cylinder 2 in the portion where the excessive fiber is accumulated is less and is less likely to be piled up due to the fiber accumulation. The molded body material interferes with the suction force. Therefore, the scraped formed material fibers are easily re-deposited on both sides of the portion where the excessive fibers are accumulated in the accumulation recess 22, compared to the portion where the excessive fibers are accumulated in the accumulation recess 22. As described above, in the fiber stacking device 10 of the present embodiment, the fibers of the molded body material scraped off by the scraping roller 42 can be re-deposited on the both side portions of the collecting recess portion 22 in the vicinity, so that the inside of the duct 4 can be The flow of the wind that transports the molded body material is not easily changed, and it is easy to manufacture the absorbent body of the desired basis weight.

In the fiber stacking device 10 of the present embodiment, the hanging plate 43 is provided between the pair of partition plates 41 and 41 and the scraping roller 42, and the scraping roller 42 is partitioned inside the duct 4 by the hanging plate 43. Therefore, in the present embodiment, the molded body material which is scraped and returned to the upstream side in the scattering state is returned to the vicinity of the upstream side by the hanging plate 43 and is excessively opposed to the collecting recess 22 In the portion where the fibers are piled up, the scraped molded body material is easily accumulated in the both side portions of the portion where the excessive fibers are accumulated in the collecting recess portion 22. In particular, in the present embodiment, as shown in Fig. 15, the hanging plate 43 is formed into an arc shape in an arc shape from the top surface of the duct 4 toward the rotation direction (R2 direction) of the rotary cylinder 2, so that it is formed by scraping. The body material is easily guided to the hanging plate 43 and the fibers are re-stacked.

Then, after the fiber re-stacking step, the height of the molded body material in which the fibers are deposited in the collecting recess 22 is adjusted to a fixed height by the scraping roller 42 (height adjusting step). In the fiber stacking device 10 of the present embodiment, the roller body 421 and the plurality of protrusions 422 of the wiper roller 42 are disposed over the entire width of the rotary cylinder 2, and the height of the projection 422 is set to reach the outermost surface of the rotary cylinder 2. The height of the outer surface 29a of the annular plate 29. Therefore, in the present embodiment, the molded body material in which the fibers are accumulated in the collecting recess 22 is scraped off by the scraping roller 42, and the scraped molded body material is adjusted to the projection 422 of the scraping roller 42. The height, that is, the height of the outer surface 29a of the annular plate 29 is adjusted in the present embodiment.

In the above manner, as shown in FIG. 9, after the molded material fiber is accumulated in the collecting recess 22 to obtain the fiber deposit 32, the rotating drum 2 is further rotated. Then, when the fiber deposit 32 in the collecting recess 22 reaches the opposite position of the vacuum box 11, it is sucked into the mesh belt 13 by suction from the vacuum box 11, and is in this state It is conveyed to the closest portion of the transfer roller 5 and the rotary cylinder 2 or its vicinity. Then, the fiber deposit 32 adsorbed to the mesh belt 13 is released from the collecting recess 22 by suction from the side of the self-propagating roller 5, and is transferred to the transfer roller 5 together with the mesh belt 13.

Fig. 16 shows the fiber deposit 32 immediately after being released from the collecting recess 22 in the present embodiment. As shown in FIG. 16 , the fiber deposit 32 has a portion having a height corresponding to the depth of the central portion of the accumulation recess 22 and a portion corresponding to the high recess portion 23 is a thick portion 33 having a high height and a recess portion 23 other than the middle height recess portion 23 . The portion corresponding to the collecting recess 22 is a thin portion 34 having a low height. Specifically, the height of the thick portion 33 is formed by the thickness of the space plate 26 disposed on the medium-high porosity plate 25, the thickness of the concave portion dividing plate 28, and the thickness of the annular plate 29. Further, the thin portion 34 is formed by the thickness of the concave portion partitioning plate 28 disposed on the porous sheet 27 and the thickness of the annular plate 29.

More specifically, the thick portion 33 is divided into MD division forming members 262 and CD in a lattice-like intersection in a region surrounded by the annular division forming member 261 of the space plate 26 disposed on the middle-high porosity plate 25. The forming member 263 is divided and has a divided thick portion 331. In addition, the thin-walled portion 34 is divided into MD partitioning members 285 and CD which are arranged in a lattice shape in the opening portion dividing portion 284 of the recessed portion dividing plate 28 of the concave portion dividing plate 28 disposed on the porous plate 27. The forming member 286 is divided and has a divided thin portion 341.

Further, in the fiber stacking device 10 of the present embodiment, the inner surface of the high-purpose concave portion 23 is disposed in the central portion of the accumulation concave portion 22, and the adjustment body 20 is not disposed, and Concave concave for distribution other than the medium-high porosity plate 25 The adjustment body 20 is disposed on the inner surface of the porous plate 27 in the region of the portion 22. Therefore, the thick portion 33 of the fiber deposit 32 obtained in the present embodiment is a relatively high basis weight portion in which the amount of fibers of the absorbent body material is relatively large, and the thin portion 34 is relatively the raw material of the absorbent body. Low basis weight with less fiber accumulation. Further, the bottom surface of the fiber deposit 32 is substantially flattened by the scraping roller 42.

The fiber deposit 32 transferred onto the transfer roller 5 is conveyed while being sucked by the transfer roller 5 side, and is transferred to the vacuum conveyor 6 disposed under the transfer roller 5 A cover sheet 37 of a toilet paper or a liquid permeable non-woven fabric or the like. Thereafter, as shown in FIG. 9, both sides of the clad material 37 in the transport direction are folded back, and the upper and lower surfaces of the fiber deposit 32 are covered with the clad material 37. Then, the fiber deposit 32 in a state in which the packaged chip material 37 is covered is attached to the core material 37, and the cutting roller 72 of the cutting device 7 is cut in the middle between the adjacent thick portions 33 and 33. Broken. Thus, the absorber 3 covered with the packaged core material 37 can be obtained.

The absorber 3 obtained in the present embodiment includes the thick portion 33 and the thin portion 34, and is an absorber having a locally different height as a material of the molded body of the absorbent material. By the action of one of the partition plates 41, 41 and the scraper roller 42 disposed in the duct 4, no unevenness in fiber accumulation is observed in the absorber 3, and the absorber 3 serves as a disposable diaper, a menstrual napkin, The absorbent body of an absorbent article such as an incontinence pad is preferably of a high quality. As described above, according to the fiber stacking device 10 of the present embodiment and the method of manufacturing the same, it is possible to stably manufacture an absorber including a high portion of a desired height. Further, by the action of the above-described adjustment body 20, the thick portion 33 has a relatively high basis weight, and the thin portion 34 has a relatively low basis weight. As described above, according to the fiber stacking device 10 of the present embodiment and the method of manufacturing the same, it is possible to stably manufacture an absorber including a high portion among the desired basis weights.

The present invention (second invention) is not limited by the fiber stacking device 1 of the above embodiment, and can be appropriately changed. In addition, in the other embodiment and the embodiment described below, components different from the above-described embodiments and embodiments will be mainly described, and the same components are attached. The same symbols are given and the description is omitted. The description of the above embodiments and the embodiments will be appropriately applied to the components that are not particularly described.

For example, in the fiber stacking device 10 of the above-described embodiment, the adjustment body for adjusting the suction force is not disposed on the inner surface side of the high-purpose porous plate 25 (porous member) only among the high-purpose concave portions 23 in the accumulation concave portion 22. 20, in addition to the inner surface side of the high-purpose porous plate 25 (porous member) among the high-purpose concave portions 23 in the accumulation concave portion 22, the circumferential direction of the rotary cylinder in the accumulation concave portion 22 (2Y direction) The outermost edge portions of the both side portions are also not provided with the adjustment body 20 for adjusting the suction force. Specifically, as shown in Fig. 17, the rotating drum 2A of the fiber stacking device has the same high-purpose porous sheet 25, space plate 26, and porous sheet as those of the rotating drum 2 constituting the fiber stacking device 10 of the above-described embodiment. 27. The recess dividing plate 28 and the pair of annular plates 29, and having a suction adjusting plate 24A different from the suction adjusting plate 24 constituting the rotating drum 2 of the fiber stacking device 10. Specifically, the suction adjustment plate 24A is divided by the opening portion 245s disposed at the outermost edge portion of the both side portions in the circumferential direction (2Y direction) of the rotary cylinder with respect to the opening portion 265 and the concave portion of the corresponding space plate 26 The similarity ratio of the opening portion 283 of the plate 28 is 1, and the opening area of the opening portion 245s disposed at the outermost edge portion is the same as the opening area of the opening portion 265 of the space plate 26 and the opening portion 283 of the concave portion dividing plate 28. Therefore, the rotating cylinder 2A of the fiber stacking device is on the inner surface side of the outermost edge portion of the both sides in the circumferential direction (2Y direction) of the porous plate 27 of the collecting recess 22 other than the middle-high concave portion 23, The adjustment body 20 for adjusting the suction force is not disposed. In the same manner as the rotary cylinder 2 of the fiber stacking device 10, the inner peripheral side of the high-purpose recessed portion 23 of the high-purpose recessed portion 23 is not disposed in the inner peripheral side of the high-purpose recessed portion 23. The adjustment body 20 of the suction force is adjusted. In other words, the rotating cylinder 2A of the fiber stacking device is a highly porous plate among the outermost edge portion and the middle-high recess portion 23 of both side portions in the circumferential direction (2Y direction) of the porous plate 27 of the collecting recess portion 22. An adjustment body 20 for adjusting the suction force is disposed on the inner surface side of the rotating cylinder 2A in the region of the grip.

According to the manufacturing method of the rotary cylinder 2A using the fiber stacking device as described above, In the fiber re-stacking step after the fiber stacking step, the rotating drum 2A of the fiber stacking device is not disposed with the adjusting body on the inner surface side of the rotating cylinder 2A at the outermost edge portion of the both side portions in the circumferential direction (2Y direction) 20, the suction force of the two outermost edge portions is increased, and the scraped molded body material is easily re-deposited toward the two outermost edge fibers, and is again returned to the width direction of the rotating cylinder 2 in the scattering state (2Y direction) The molded body material in the entire region is easily diffused, and the molded body material which is uniformly scraped is easily accumulated in the accumulation concave portion 22 . As described above, according to the manufacturing method of the rotary cylinder 2A using the fiber stacking device, the absorber including the high portion among the desired basis weights can be stably produced.

Further, in the fiber stacking device 10 of the above-described embodiment, the inner surface side of the rotary tube 2 of the porous plate 27 (porous member) other than the middle-high recess portion 23 of the accumulation concave portion 22 is disposed and adjusted. The suction body 20 is adjusted by suction, but the adjustment body 20 for adjusting the suction force may be disposed in any area. The fiber deposit 32 produced by using the rotating drum 2 is a discrete fiber deposit having a thick portion 33 having a high height and a thin portion 34 having a low height. The thick portion of the discrete fiber deposit is a high basis weight having a relatively high basis weight, and the thin portion is a low basis weight having a relatively low basis weight.

Further, the shape of the produced fiber deposit 32 is not limited to the above shape, and the suction adjustment plate 24, the medium-high porosity plate 25, the space plate 26, the porous plate 27, the concave portion dividing plate 28, and the like may be replaced. The arrangement or shape of the accumulation recesses 22 and the arrangement or shape of the middle-high recesses 23 are flexibly changed by the pair of annular plates 29 and the like. Further, among the second regions in which the depth of the middle-high recesses 23 is deeper than the first region, the high-pitched portions 23 may be disposed in regions other than the central region of the stacking recess 22 .

Further, as shown in FIGS. 11 and 17, the rotary cylinder 2 includes a suction adjustment plate 24, a medium-high porosity plate 25, a space plate 26, a porous plate 27, a concave partition plate 28, and a pair of annular plates 29. The plate, but it is also possible to replace the plate, for example, a plate in which a portion of the body having a high basis weight is formed to be deeply recessed. Further, the present invention includes a suction adjustment plate 24, a medium-high porosity plate 25, a space plate 26, a porous plate 27, a concave partition plate 28, and a pair of annular plates 29. The plate can produce an absorber having a high basis weight ratio with high precision.

The absorbent body produced in the present invention (second invention) is preferably used as an absorbent body of an absorbent article. The absorbent article is mainly used for absorbing body fluids that are excreted by the body such as urine or menstrual blood. The absorbent article includes, for example, disposable diapers, menstrual sanitary napkins, incontinence pads, sanitary pads, and the like, but is not limited thereto, and widely includes articles for absorbing liquid discharged from a human body.

Further, the requirements of only one of the first invention and the second invention can be appropriately applied to other inventions, and the requirements of the respective inventions can be replaced with each other as appropriate.

In the above embodiment, the following apparatus for manufacturing an absorbent body is further disclosed.

<1A>

An apparatus for manufacturing an absorbent body, comprising: a rotating cylinder having a concave portion for collecting on an outer circumferential surface; and a duct for supplying the molded body material to a peripheral surface of the rotating cylinder in a scattering state; and by using the rotating cylinder The formed body material fiber is deposited in the accumulation recessed portion by the airflow generated by the suction inside, and the absorber is molded, and the accumulation recessed portion has a first region and a second region having a depth deeper than the first region. Inside the pipe, in a space separated by a hanging plate that is suspended from a top surface of the pipe in a downstream direction of the rotating cylinder, the scraping roller and the pipe opening portion are formed, and the scraping roller is formed by the surface and the forming Arranging the body material in contact with each other, and scraping the excess amount of the molded body material accumulated by the fiber, the pipe opening portion is disposed on a downstream side of the rotating roller in the rotation direction of the rotating drum, and is sucked into the outside atmosphere. The inside of the pipe is divided into the fiber accumulation region and the fiber re-depositing region by the hanging plate, and the fiber accumulation region is more than the hanging plate. Upstream side of the rotation direction of the cylinder, so that the scattering state of the shaped body material from said agglomeration with overflow concave portion of the fiber excessively deposited, and then stacking said fiber-based region of the hanging plate closer than the above-described On the downstream side of the rotating cylinder in the above-described rotation direction, the molded body material which has been excessively accumulated by the fiber is scraped off by the above-mentioned scraping roller, and the scraped molded body material fiber is further deposited on the collecting recess.

<2A>

The apparatus for manufacturing an absorbent body according to the above <1A>, wherein the tube opening portion between the scraping roller and the top surface of the duct is placed in a state in which the molded body material fiber in a scattering state is deposited in the collecting recessed portion. The flow rate of the external atmosphere that is drawn in is faster than the flow rate of the external atmosphere that is taken in from the opening of the pipe between the scraper roller and the rotating drum.

<3A>

The apparatus for manufacturing an absorbent body according to the above <2A>, wherein a flow velocity (V1) of the external atmosphere sucked from the opening of the duct between the scraper roller and the top surface of the duct is relative to the scraper roller and the rotary cylinder The ratio (V1/V2) of the flow velocity (V2) of the outside air taken in by the pipe opening is 1 or more and 4 or less, preferably 1.5 or more and 3 or less.

<4A>

The apparatus for manufacturing an absorbent body according to the above <2A> or <3A>, wherein a flow velocity (V1) of the external atmosphere sucked from the opening of the duct between the scraper roller and the top surface of the duct is 5 m/s or more and 100 m. Below /s, it is preferably 10 m/s or more and 70 m/s or less.

<5A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the flow rate (V2) of the external atmosphere sucked from the nozzle opening of the scraping roller and the rotating cylinder is 0.1 m/s or more. 70 m/s or less, preferably 0.1 m/s or more and 50 m/s or less.

<6A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the duct opening portion has an external air amount adjusting mechanism that adjusts an opening area thereof to adjust an amount of the external atmosphere to be sucked.

<7A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the tube opening portion is provided with a lock plate that closes the side of the rotating cylinder.

<8A>

The apparatus for manufacturing an absorbent body according to the above <7A>, wherein the lock plate is disposed over the entire width of the pipe opening portion of the pipe, and is formed from a top surface side of the pipe opening portion toward the rotating drum side mobile.

<9A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the duct opening portion is provided at a position on a top surface side of the duct in a height direction of the duct.

<10A>

The apparatus for manufacturing an absorbent body according to any one of the above aspects, wherein the duct opening portion is provided above the rotating drum than the rotating shaft of the scraping roller.

<11A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the rotary cylinder has a plurality of spaces partitioned therein, and has a suction force adjustment for adjusting a suction force of each of the spaces. mechanism.

<12A>

The apparatus for manufacturing an absorbent body according to the above <11A>, wherein the rotating cylinder has a space A and a space B as the space in a region where the outer peripheral surface is covered by the duct.

<13A>

The apparatus for manufacturing an absorbent body according to the above <12A>, wherein the space A and the space B are maintained at a negative pressure.

<14A>

The apparatus for manufacturing an absorbent body according to the above <13A>, wherein the negative pressure of the space B is set to be the same as or weaker than the negative pressure of the space A.

<15A>

The apparatus for manufacturing an absorbent body according to the above <14A>, wherein the negative pressure of the space B is set to a negative pressure which is weaker than the negative pressure of the space A.

<16A>

The apparatus for manufacturing an absorbent body according to any one of the above aspects, wherein the second region is formed by a high-pitched portion disposed in a central region of the accumulation concave portion.

<17A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the collecting recess of the rotating cylinder is configured to pass through the first region while maintaining a space A that is maintained at a negative pressure. The porous plate on the bottom surface of the second region and the medium-high porous plate are sucked from the suction portion.

<18A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the rotating drum comprises: a cylindrical drum body; and a suction adjusting plate which is overlapped and fixed to an outer peripheral portion of the drum body; a medium-high porous plate (porous member) which is superposed and fixed on the outer surface side of the suction adjustment plate; a space plate which is overlapped and fixed on the outer surface side of the medium-high porous plate; a porous plate (porous a member, which is fixedly attached to the outer surface side of the space plate; a recessed partitioning plate that is overlapped and fixed to the outer surface side of the porous plate; and an annular plate that is overlapped and fixed to the concave partitioning plate Surface side.

<19A>

The apparatus for manufacturing an absorbent body according to the above <18A>, wherein the recessed portion dividing plate has a plurality of cross-shaped opening portions which are equal to each other in a thickness direction in a plan view; the cross-shaped opening portion divides and forms members, which are divided into respective crosses. An opening portion; a plurality of openings that penetrate in the thickness direction; and an opening portion defining portion that defines the opening.

<20A>

The manufacturing apparatus of the absorber of the above-mentioned <18A> or <19A>, wherein the porous plate has a plurality of cross-shaped openings in a plan view, and the cross-shaped opening of the porous plate is disposed to be overlapped and fixed The cross-shaped opening portions of the concave portion dividing plates on the outer surface of the porous plate are at the same position.

<21A>

The apparatus for manufacturing an absorbent body according to any one of the above aspects, wherein the space plate has an annular division formed along a contour of each of the cross-shaped opening portions of the porous plate in a plan view. In the above-mentioned medium-high porosity plate, the contour of the medium-high porosity plate is not identical to that of the annular division forming member, and the entire shape thereof is also present in the opening portion of the porous plate and the cross-shaped opening portion of the concave portion dividing plate. The shape of the top view is identical to each other.

<22A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the duct opening portion is formed in an outlet of the duct which is located at the most downstream of the rotation direction of the rotating cylinder.

<23A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the inside of the duct on the upstream side in the rotation direction of the rotating cylinder is further disposed on the rotating drum One of the pair of partition plates in the circumferential direction, the molded body material in a scattering state is excessively accumulated in the accumulation recessed portion by the pair of partition plates, and the fiber is excessively accumulated in the accumulation recessed portion. In the region corresponding to the partition plates, the molded body material which has been excessively accumulated by the fibers is scraped off by the scraping roller, and the molded body material fibers scraped in the separated space are further deposited in the above-mentioned accumulation. Both sides of the portion of the recess where excess fiber is accumulated.

<24A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the bottom surface of the second region and the bottom surface of the first region each include a porous member having a plurality of suction holes, The inner surface side of the porous member in the collecting recess, the adjusting body for adjusting the suction force is disposed on the inner surface of the porous member, and the adjusting body has a plurality of openings that penetrate the adjusting body in the thickness direction. One of the openings is smaller in opening area than the one of the openings which are relatively farther from the porous member of the collecting recess.

<25A>

The apparatus for manufacturing an absorbent body according to the above <24A>, wherein an adjustment body for adjusting a suction force is not disposed on an inner surface side of the porous member in the second region, and the outer surface of the suction hole of the porous member is The opening area of the side is the same as the opening area of the inner surface side.

<26A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the pair of partition plates are inclined so as to gradually narrow toward each other toward the rotating drum, the pair of partition plates The interval between the end portions on the side of the rotating cylinder coincides with the width of the second region.

<27A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the hanging plate is formed over the entire width of the pipe from the top surface of the pipe toward the circumferential direction of the rotating cylinder (2X direction) ) The arc side of the upstream side is convex.

<28A>

The manufacturing apparatus of the absorbent body according to any one of the above <1A> to <27A>, wherein The shaped body material comprises a fibrous material.

<29A>

The apparatus for producing an absorbent body according to any one of the above-mentioned items, wherein the molded body material contains a water-absorbent polymer while containing the fibrous material.

<30A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the scraping roller has a cylindrical roller body and a plurality of projections for scraping on a peripheral surface of the roller body.

<31A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the scraping roller rotates in a direction opposite to a direction in which the rotating cylinder is opposed to the rotating cylinder.

<32A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the peripheral speed of the scraping roller is twice or more and 10 times or less, more preferably 3 times the circumferential speed of the rotating drum. More than 5 times and less than 5 times.

<33A>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the absorbent body is used for an absorbent article such as a disposable diaper, a menstrual sanitary napkin, an incontinence pad, a sanitary pad, or the like.

<1B>

An apparatus for manufacturing an absorbent body, comprising: a rotating cylinder having a concave portion for collecting on an outer circumferential surface; and a duct for supplying the molded body material to a peripheral surface of the rotating body in a scattering state; and by using the rotating cylinder The formed body material fiber is deposited in the accumulation recessed portion by the airflow generated by the suction inside, and the absorber is molded, and the accumulation recessed portion has a first region and a second region having a depth deeper than the first region. The inside of the duct includes a pair of partition plates and a scraping roller, and the pair of partition plates are disposed on both sides of the rotating cylinder in the circumferential direction, and the scraping roller is disposed in contact with the molded body material And the pair of separators are formed by scraping the molded body material in an excess amount of the fibers, and the pair of separators are excessively accumulated in the accumulation recessed portion so that the molded body material in a scattering state overflows from the accumulation recessed portion. The pair of partition plates are disposed apart from each other so as to be spaced apart from each other by the pair of partition plates, and the scraper roller is disposed downstream of the pair of partition plates toward the rotation direction of the rotating drum a position away from the side so as to scrape the excess amount of the molded body material accumulated in a region corresponding to the pair of partition plates, and re-stack the scraped material of the molded body material for the above-mentioned accumulation Both sides of the portion of the recess where excess fiber is accumulated.

<2B>

The apparatus for manufacturing an absorbent body according to the above <1B>, wherein the inside of the duct has a hanging plate hanging from a top surface of the duct between the pair of partition plates and the scraping roller, by the hanging plate The inner portion of the duct is broken into a fiber accumulation region on the upstream side in the rotation direction and a fiber re-distribution region on the downstream side in the rotation direction.

<3B>

The apparatus for manufacturing an absorbent body according to the above <1B> or <2B>, wherein the bottom surface of the second region and the bottom surface of the first region each include a porous member having a plurality of suction holes, and the first region is On the inner surface side of the porous member, an adjustment body for adjusting the suction force is disposed on the inner surface of the porous member, and the adjustment body has a plurality of openings that penetrate the adjustment body in the thickness direction, and one of the openings The opening portion which is located farther from the porous member of the concave portion for the accumulation is smaller than the opening portion which is relatively close to one of the openings.

<4B>

The apparatus for producing an absorbent body according to the above <3B>, wherein the inner surface side of the porous member in the second region or the inner surface side of the porous member other than the second region is in the accumulation concave portion An adjustment body for adjusting the suction force is not disposed on the inner surface side of the outermost edge portion of the both side portions in the circumferential direction of the rotating cylinder, and the opening area and the inner surface of the outer surface side of the suction hole of the porous member are not disposed. The opening area on the side is the same.

<5B>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the pair of partition plates are inclined so as to gradually narrow toward each other toward the rotating cylinder, and the pair of partition plates The interval between the end portions on the side of the rotating cylinder coincides with the width of the second region.

<6B>

The apparatus for manufacturing an absorbent body according to any one of the above aspects, wherein the second region is formed by a high-pitched portion disposed in a central region of the accumulation concave portion.

<7B>

The apparatus for manufacturing an absorbent body according to any one of the above aspects, wherein the partition plate has a cross section of a trapezoidal cross section having a substantially right-angled triangle or a very narrow upper and lower bottom. Trapezoidal shape.

<8B>

The apparatus for manufacturing an absorbent body according to any one of the above aspects, wherein the scraping roller is disposed inside the duct, and is disposed on a downstream side of a region of the space B of the rotating cylinder, and is in the rotating drum The space B is connected to a known exhaust device such as an intake fan, and by operating the exhaust device, the space B can be maintained at a negative pressure.

<9B>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the scraping roller has a cylindrical roller body and a plurality of projections for scraping on a peripheral surface of the roller body.

<10B>

The apparatus for manufacturing an absorbent body according to any one of the above aspects, wherein the scraping roller is disposed in a width direction of the drum, and the roller body is disposed over the entire width of the rotating cylinder, and the plurality of protrusions are disposed at least in the above A region on the second region of the central portion of the collecting recess.

<11B>

The apparatus for manufacturing an absorbent body according to any one of the above aspects, wherein the scraper roller rotates in a direction opposite to a direction opposite to a rotation direction of the rotary cylinder.

<12B>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the circumferential speed of the scraping roller is preferably 2 times or more and 10 times or less as compared with a peripheral speed of the rotating drum, and further It is preferably 3 times or more and 5 times or less.

<13B>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the apparatus for manufacturing the absorbent body has a hanging plate inside the pipe, the hanging plate is attached to the pair of partition plates and the The scraping rolls are suspended from the top surface of the pipe, and the hanging plate is formed in an arc shape extending from the top surface of the pipe toward the upstream side of the circumferential direction of the rotating cylinder over the entire width of the pipe.

<14B>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the apparatus for manufacturing the absorbent body has a hanging plate inside the pipe, and the hanging plate is Between the pair of partition plates and the scraping roller, hanging from the top surface of the pipe, with respect to the hanging plate, the front end of the hanging plate is suspended down to the top of the forming body material which is not excessively accumulated with the fiber in an overflow manner. Until the location of the contact.

<15B>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned <1B> to <14B, further comprising: a pipe for supplying a molded body material to an outer peripheral surface of the rotating drum; and a conveying roller disposed at an inclination of the rotating cylinder The lower portion is rotationally driven in a direction of an arrow R5 that is a positive direction with respect to a conveying direction of the packaged core material constituting the absorbent body, a vacuum conveyor disposed below the transfer roller, and a cutting device.

<16B>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the vacuum tank is further disposed between the duct and the transfer roller in the circumferential direction of the rotary cylinder, and passes through the vacuum chamber. A mesh belt is disposed between the rotating cylinders and between the conveying rollers and the rotating cylinder.

<17B>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the apparatus for manufacturing the absorbent body has a hanging plate inside the pipe, and the hanging plate is attached to the pair of partition plates and the The scraper rolls are suspended from the top surface of the pipe, and the windshield plate is disposed adjacent to the outer peripheral surface of the transfer roller.

<18B>

The apparatus for producing an absorbent body according to any one of the above-mentioned <1B> to <17B, wherein the molded body material comprises a fibrous material.

<19B>

The apparatus for producing an absorbent body according to any one of the above-mentioned items, wherein the molded body material is a short fiber of a cellulose fiber such as a pulp fiber such as a defibrating pulp, a ray fiber or a cotton fiber, or Short fibers of synthetic fibers such as polyethylene.

<20B>

The apparatus for producing an absorbent body according to any one of the above-mentioned items, wherein a water-absorbent polymer is used together with the fibrous material as the molded body material.

<21B>

The apparatus for producing an absorbent body according to any one of the above-mentioned items, wherein the absorbent body is in the case of an absorbent body for an absorbent article such as a disposable diaper or a menstrual napkin, the molded body material. It is the raw material for the absorber.

<22B>

The apparatus for manufacturing an absorbent body according to any one of the above-mentioned items, wherein the lower end of the pair of partition plates is closest to the lower end of the rotary cylinder, and is observed in a cross section along the rotation axis direction of the rotary cylinder. The side wall constituting the duct extends to cover the position of the side portion in the circumferential direction in the recess for collecting.

<23B>

A method for producing an absorbent body, comprising a fiber stacking step of supplying a molded body material to a rotating drum having a concave portion for collecting on an outer peripheral surface in a scattering state, and depositing the molded material fiber in the collecting concave portion. In the fiber stacking step, the formed body material in a scattered state is excessively accumulated in a state in which the fibers are dispersed in a region corresponding to the pair of partition plates in the accumulation recessed portion by using a pair of partition plates. After the fiber stacking step, the fiber re-stacking step is performed by scraping the molded body material from which the excess fiber is deposited, and the scraped the molded body material fiber is further deposited in the collecting recess. Both sides of the portion where the fiber is excessively accumulated.

<24B>

The method for producing an absorbent body according to the above <23B>, wherein in the fiber re-stacking step, the molded body material in which excessive fibers are accumulated is scraped off using a doctor roll.

<25B>

The method for producing an absorbent body according to the above-mentioned <23B> or <24B>, wherein the bottom surface of the fiber deposit obtained by depositing the molded material fiber in the accumulation concave portion is substantially flat by the scraping roller. The fiber deposit in a state in which the packaged chip material is coated is joined together with the packaged chip material, and the cutting roller of the cutting device is cut at an intermediate position between the adjacent thick portions to obtain the packaged chip. Material coated absorber.

<26B>

The method for producing an absorbent body according to any one of the above-mentioned, wherein the scraping roller is disposed further away from the downstream side of the rotating cylinder than the pair of partitioning plates, and the fiber re-stacking step It is performed on the downstream side in the above-described rotation direction from the pair of partition plates.

[Industrial availability]

According to the invention (the first invention), the molded body material scraped off by the doctor roll can be easily peeled off from the projection of the doctor roll, and the absorbent body including the high portion of the desired height can be stably produced.

According to the present invention (second invention), it is possible to stably manufacture an absorbent body including a middle portion of a desired height.

Claims (29)

An apparatus for manufacturing an absorbent body, comprising: a rotating cylinder having a concave portion for collecting on an outer circumferential surface; and a duct for supplying the molded body material to a peripheral surface of the rotating cylinder in a scattering state; and by using the rotating cylinder The formed body material fiber is deposited in the accumulation recessed portion by the airflow generated by the suction inside, and the absorber is molded, and the accumulation recessed portion has a first region and a second region having a depth deeper than the first region. Inside the pipe, in a space separated by a hanging plate that is suspended from a top surface of the pipe in a downstream direction of the rotating cylinder, the scraping roller and the pipe opening portion are formed, and the scraping roller is formed by the surface and the forming Arranging the body material in contact with each other, and scraping the excess amount of the molded body material accumulated by the fiber, wherein the pipe opening portion is disposed on a downstream side of the rotating roller in the rotation direction of the rotating drum, and is sucked into the outside atmosphere; The inside of the pipe is divided into the fiber accumulation region and the fiber re-depositing region by the hanging plate, and the fiber accumulation region is more than the hanging plate. In the upstream side of the rotation direction of the rotary cylinder, the molded body material in a scattering state is excessively accumulated in the fiber so as to overflow from the accumulation recess, and the fiber re-distribution region is closer to the rotation direction of the rotary cylinder than the hanging plate. On the downstream side, the molded body material which is excessively accumulated by the fiber is scraped off by the scraper roller, and the scraped material of the molded body material is further deposited on the accumulation recessed portion, and the molded body material is only in the fiber re-depositing region. That is, the space separated by the above is accumulated. The apparatus for manufacturing an absorbent body according to claim 1, wherein the fiber of the molded body material in a scattering state is deposited in the recessed portion of the collecting portion, and is sucked from the opening of the duct between the scraping roller and the top surface of the duct. The flow rate of the external atmosphere is fast The flow rate of the outside atmosphere sucked from the opening of the duct between the scraper roller and the rotating cylinder. The apparatus for manufacturing an absorbent body according to claim 1, wherein the duct opening portion has an external air amount adjusting mechanism that adjusts an opening area thereof to adjust an amount of the external atmosphere to be sucked. The manufacturing apparatus of the absorbent body according to claim 1, wherein the rotating cylinder has a plurality of spaces partitioned therein, and has a suction force adjusting mechanism that adjusts a suction force of each of the spaces. The apparatus for manufacturing an absorbent body according to claim 1, wherein the duct opening portion is formed in an outlet of the duct which is located at the most downstream of the rotating direction of the rotating cylinder. The manufacturing apparatus of the absorbent body according to claim 1, wherein the inside of the duct upstream of the rotating plate in the rotation direction of the rotating plate includes one of two sides arranged in the circumferential direction of the rotating cylinder In the separator, the formed body material in a scattering state is excessively accumulated in the accumulation recessed portion so as to correspond to the pair of partition plates, so that the molded body material in a scattering state overflows from the accumulation recessed portion. a region in which an excess amount of the molded body material accumulated by the fiber is scraped off by the scraper roller, and the scraped material of the molded body material is re-deposited in the space for the excess of the accumulation recessed portion in the recessed space. Part of the sides. The apparatus for manufacturing an absorbent body according to claim 1, wherein the bottom surface of the second region and the bottom surface of the first region each include a porous member having a plurality of suction holes, and the porous member in the accumulation concave portion On the inner surface side, an adjustment body for adjusting the suction force is disposed on the inner surface of the porous member, and the adjustment body has a plurality of openings that penetrate the adjustment body in the thickness direction, and one of the openings is separated from the agglomeration The opening area of the opening portion which is relatively far away from the porous member of the concave portion is smaller than the opening of the relatively close one side The opening area of the department. The apparatus for manufacturing an absorbent body according to claim 7, wherein an adjustment body for adjusting a suction force is not disposed on an inner surface side of the porous member in the second region, and the suction hole of the porous member is on an outer surface side The opening area is the same as the opening area on the inner surface side. The manufacturing apparatus of the absorbent body according to claim 1, wherein the inside of the duct upstream of the rotating plate in the rotation direction of the rotating plate includes one of two sides arranged in the circumferential direction of the rotating cylinder In the separator, the pair of partition plates are inclined so as to gradually narrow toward each other toward the rotating cylinder, and the distance between the end portions of the pair of partition plates on the rotating drum side and the width of the second region Consistent. The manufacturing apparatus of the absorbent body according to claim 1, wherein the duct opening portion is provided at a position on a top surface side of the duct in a height direction of the duct. The manufacturing apparatus of the absorbent body according to claim 1, wherein the duct opening portion is disposed above the rotating cylinder than the rotating shaft of the scraping roller. The manufacturing apparatus of the absorbent body of claim 1, further comprising a pair of partitioning plates, the pair of partitioning plates being disposed inside the duct, and disposed on both sides of the rotating cylinder in a circumferential direction, the pair of partitions The plate is formed such that the molded body material in a scattering state is excessively accumulated in the accumulation recessed portion so as to overflow the recessed portion from the accumulation recessed portion, and is spaced apart from the pair of partition plates. Arranging the partition plates at a distance from each other, the scraper roller is disposed at a position away from the downstream side of the pair of partition plates in the rotation direction of the rotary cylinder, so that the scraping fibers are stacked on the pair of partition plates and the pair of partition plates Excess amount of the shaped body material between the corresponding areas, and will be scraped The molded body material fibers are further deposited on both side portions of the portion where the excessive fibers are accumulated in the accumulation concave portion. The manufacturing apparatus of the absorbent body of claim 12, wherein the hanging plate has the hanging plate inside, and the hanging plate is located between the pair of dividing plates and the scraping roller, and the inside of the pipe is disposed by the hanging plate Partially broken is a fiber accumulation region on the upstream side in the rotation direction and a fiber re-distribution region on the downstream side in the rotation direction. The apparatus for manufacturing an absorbent body according to claim 12, wherein the bottom surface of the second region and the bottom surface of the first region each include a porous member having a plurality of suction holes, and the porous member is in the first region On the surface side, an adjustment body for adjusting the suction force is disposed on the inner surface of the porous member, and the adjustment body has a plurality of openings that penetrate the adjustment body in the thickness direction, and one of the openings is located at a distance from the accumulation recess The opening area of the opening portion of the porous member is smaller than the opening area of the opening portion which is relatively close to one side. The apparatus for manufacturing an absorbent according to claim 14, wherein the inner surface side of the porous member in the second region or the inner surface side of the porous member in the second region and the edge in the collecting recess An adjustment body for adjusting the suction force is not disposed on the inner surface side of the outermost edge portion of the both sides of the circumferential direction of the rotary cylinder, and the opening area of the outer surface side of the suction hole and the opening of the inner surface side of the porous member The area is the same. The manufacturing apparatus of the absorbent body of claim 12, wherein the lower end of the pair of partition plates closest to the lower end of the rotating cylinder is viewed from a side wall constituting the rotating shaft to cover the above-mentioned side wall of the duct The position of the side portion of the converging recess in the circumferential direction. The manufacturing apparatus of the absorbent body of claim 12, wherein the pair of partition plates are The rotation cylinders are inclined so as to be gradually narrowed from each other, and the distance between the end portions of the pair of partition plates on the rotating cylinder side coincides with the width of the second region. The apparatus for manufacturing an absorbent body according to claim 12, wherein the partitioning plate has a trapezoidal trapezoidal shape having a substantially right-angled triangular cross section or a trapezoidal cross section having an extremely narrow upper and lower base. The apparatus for manufacturing an absorbent body according to claim 12, wherein the scraping roller is disposed in a width direction of the cylinder, the roller body is disposed over the entire width of the rotating cylinder, and the plurality of projections are disposed at least in the second region of the central portion of the collecting recess The area above. The manufacturing apparatus of the absorbent body according to claim 12, wherein the manufacturing apparatus of the absorbent body has the hanging plate inside the pipe, and the hanging plate is located between the pair of partition plates and the scraping roller, and the hanging plate is suspended The plate is suspended from the front end of the hanging plate to a position where it does not come into contact with the top of the molded body material which is excessively accumulated in the form of overflow fibers. The manufacturing apparatus of the absorbent body according to claim 1 or 12, wherein the hanging plate is formed in an arc shape protruding from the top surface of the pipe toward the upstream side of the circumferential direction of the rotating cylinder over the entire width of the pipe. The apparatus for manufacturing an absorbent body according to claim 1 or 12, wherein the second region is formed by a high-pitched portion disposed in a central region of the accumulation concave portion. A manufacturing apparatus of an absorbent body according to claim 1 or 12, wherein said shaped body material comprises a fibrous material. A manufacturing apparatus of an absorbent body according to claim 1 or 12, wherein said molded body material further comprises a water-absorbent polymer while containing the fibrous material. The manufacturing apparatus of the absorbent body of claim 1 or 12, wherein the absorbent body is used for an absorbent article of disposable diapers, menstrual sanitary napkins, incontinence pads, and sanitary pads. A method for producing an absorbent body comprising a fiber stacking step, the fiber stacking In the step of dispersing the molded body material to a rotating cylinder having a concave portion for collecting on the outer peripheral surface, the molded material fiber is deposited in the collecting recess, and in the fiber stacking step, a pair of partition plates are used to scatter In the state in which the formed material is excessively accumulated, the fiber is deposited in a region of the accumulation recess and a region corresponding to the pair of partition plates, that is, a fiber accumulation region, and after the fiber stacking step, fiber re-stacking is provided. In the step of the fiber re-stacking step, the molded body material in which the excess fiber is deposited is scraped off, and the scraped material of the molded body material is further deposited on both sides of the portion where the excess fiber is accumulated in the collecting recess. In the fiber re-depositing region, the fiber accumulation region and the fiber re-depositing region are separated, and the molded body material is re-deposited only in the fiber re-depositing region. The method for producing an absorbent body according to claim 26, wherein in the fiber re-stacking step, the molded body material in which the excess fiber is deposited is scraped off using a doctor roll. The method for producing an absorbent body according to claim 27, wherein the bottom surface of the fiber deposit obtained by depositing the molded material fiber in the accumulation concave portion is flattened by the scraping roller, and is covered by the packaged chip material. The fiber deposits in the state are cut together with the packaged core material at the intermediate position between the adjacent thick portions by the cutting rolls of the cutting device, thereby obtaining the absorption by the coated core material. body. The manufacturing method of the absorbent body according to claim 27, wherein the scraping roller is disposed further away from the downstream side of the rotating cylinder than the pair of partitioning plates, and the fiber re-stacking step is more than the pair of partitioning plates It is carried out on the downstream side in the above-described rotation direction.