JP6377500B2 - Fiber stacking equipment - Google Patents

Description

  The present invention relates to a fiber stacking apparatus suitably used for sucking and stacking raw materials such as a fiber material and a water-absorbing polymer to obtain an absorbent body having a predetermined shape, and an absorbent body manufacturing method using the same.

  As an apparatus for manufacturing absorbent bodies used for absorbent articles such as disposable diapers, sanitary napkins, incontinence pads, etc., a rotating drum having a concave portion for accumulation on the outer peripheral surface, and pulp on the outer peripheral surface while rotating the rotating drum The raw material is supplied in a scattered state, and the raw material is piled in the accumulation recess by suction from the outer surface of the accumulation recess composed of a porous member formed with a plurality of suction holes. 2. Description of the Related Art There is known a fiber stacking apparatus in which a piled material in a stacking recess is released from the stacking recess by suction from a suction unit disposed opposite to the stacking recess and transferred onto the suction unit. . It is also known that a release air blowing means is arranged inside the rotating drum, and air is blown from the air blowing means toward the accumulation concave portion, thereby promoting the release of the piled material in the accumulation concave portion. It has been.

  Absorbers include absorbers having different basis weights in addition to absorbers having a uniform basis weight, and in the fiber stacking apparatus used for the latter production, A partial adjustment mechanism is essential. Regarding a fiber stacking apparatus provided with such an adjustment mechanism, for example, Patent Document 1 discloses a product including a fixed air distribution manifold and one or more core pockets that slide along the outer periphery of the manifold. A fiber device is described. The air distribution manifold is divided into three zones in the width direction orthogonal to the rotation direction of the core pocket (circumferential direction of the manifold) (see FIG. 10 of Patent Document 1). The suction force (suction air volume) can be controlled independently. The core pocket is formed by overlapping a number of members in the thickness direction, and has a ventilation part through which air flow generated by suction from the air distribution manifold side can pass and a non-venting part through which air flow cannot pass. Yes. According to Patent Document 1, it is said that absorbent bodies having partially different basis weights can be obtained by combining the suction force control mechanisms of the fixed air distribution manifold and the movable core pocket.

Special table 2010-509514 gazette

  The fiber stacking apparatus described in Patent Document 1 is capable of partially adjusting the fiber stacking amount of the raw materials in the stacking recesses, and is capable of manufacturing absorbent bodies having partially different basis weights. A problem may occur when transferring the piled material in the accumulation recess by air blow from the inside. That is, in the fiber stacking apparatus described in Patent Document 1, the non-breathable member is disposed by disposing a non-breathable member on a part of the outer surface of the breathable stacking concave portion that becomes the surface of the raw material to be stacked. The suction force in the section is selectively reduced to enable the production of a piled fabric (absorbent body) with a partially different basis weight. When air is blown by the air blowing means from the inner surface side of the concave portion for use, since the air does not hit the portion corresponding to the non-breathable member in the piled article, the transfer of the piled article may not be performed smoothly .

  Therefore, the present invention relates to a fiber stacking apparatus that is excellent in transferability of fiber piles in a stacking concave portion of a rotating drum and that can efficiently manufacture absorbent bodies having partially different basis weights.

  The present invention relates to a rotating drum having an accumulation concave portion in which raw materials are piled on the outer peripheral surface, a release air blow means disposed inside the rotating drum, and a suction means connected to the inside of the rotating drum. The accumulation recess formed of a porous member having a plurality of suction holes for the raw material carried on the air flow generated by suction by the suction means from the inside while rotating the rotary drum The piled product is obtained from the stacking concave portion by spraying air from the release air blowing means toward the piled product at a predetermined transfer position. In the fiber stacking apparatus for releasing the mold, a space portion defined by the porous member and a drum side wall forming a side surface of the rotating drum is formed on the inner surface side of the porous member, and the space portion is Through the suction opening provided in the drum side wall A transfer opening through which air from the release air blowing means can pass is provided on the side of the space opposite to the porous member, and the rotation of the rotating drum A non-rotating suction chamber that controls suction by the suction opening is disposed adjacent to the end in the axial direction so as to cover the suction opening, and the suction chamber is connected to the suction opening and the suction opening. A suction region that communicates with the means and a non-suction region that closes the suction opening along the circumferential direction of the rotary drum, and a region corresponding to the suction region inside the rotary drum, A non-rotating suction suppression plate that closes the transfer opening is arranged along the circumferential direction of the rotating drum, and when the stacking recess passes through the suction area, the suction area Suction opening and said suction hand The transfer opening is blocked by the suction suppression plate, and when the accumulation recess passes through the non-suction area, the suction opening is blocked by the non-suction area. In addition, the blocking of the transfer opening by the suction suppression plate is released, and air is blown from the release air blow means to the accumulation recess through the transfer opening at a predetermined transfer position. It is intended to provide a stacking device that can be used.

  The present invention also relates to a rotating drum having an accumulation recess on the outer peripheral surface on which raw materials are stacked, a release air blowing means disposed inside the rotating drum, and a suction means connected to the inside of the rotating drum. A porous member having a plurality of suction holes is used to feed a raw material carried on an air flow generated by suction by the suction means from the inside while rotating the rotary drum. A stacking step of stacking on the outer surface of the formed concave portion to obtain a stacked product, and blowing air from the release air blowing means toward the stacked product at a predetermined transfer position. And a transfer step of releasing the piled product from the accumulation recess, wherein the porous member and the side surface of the rotary drum are formed on the inner surface side of the porous member. Defined by the drum side wall A portion is formed, and the space portion can communicate with the outside via a suction opening provided in the drum side wall, and the mold release is provided on the opposite side of the space portion from the porous member. A transfer opening through which air from the air blowing means can pass is provided, and a non-rotating suction chamber for controlling suction by the suction opening is provided at the end of the rotating drum in the rotation axis direction. The suction chamber is arranged so as to cover the opening, and the suction chamber includes a suction area that communicates the suction opening and the suction means, and a non-suction area that closes the suction opening. A non-rotating suction suppression plate that closes the transfer opening is disposed along the circumferential direction of the rotating drum in a region corresponding to the suction region inside the rotating drum. In the stacking process, the suction area Therefore, the suction opening and the suction means are communicated with each other, and the transfer opening is closed by the suction suppression plate, so that the air flow generated by the suction by the suction means In the transfer step, the suction opening is blocked by the non-suction area, and the transfer opening is blocked by the suction suppression plate, and is moved to a predetermined transfer position. Thus, the present invention provides a method for manufacturing an absorbent body, in which air is blown from the release air blowing means to the concave portion for accumulation through the transfer opening.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in the transferability of the fiber in the recessed part for accumulation | storage of a rotating drum, and can manufacture especially the absorber from which basic weight differs partially efficiently.

FIG. 1 is a schematic perspective view showing one embodiment of the fiber stacking apparatus of the present invention. FIG. 2 is a side view showing a schematic configuration of the fiber stacking apparatus shown in FIG. FIG. 3 is a schematic perspective view of the rotary drum and the suction chamber of the fiber stacking apparatus shown in FIG. FIG. 4 is a perspective view schematically showing a part of the outer peripheral member of the rotary drum of the fiber stacking apparatus shown in FIG. 1. FIG. 5 is a cross-sectional view schematically showing a cross section along a direction orthogonal to the circumferential direction of the rotary drum and the suction chamber of the fiber stacking apparatus shown in FIG. 1. FIG. 6 is a perspective view schematically showing a state in which the piled material is released from the stacking concave portion of the pile device shown in FIG. 1. FIG. 7 is a perspective view schematically showing a part of the piled product released from the stacking concave portion of the pile device shown in FIG. 1.

  Below, this invention is demonstrated, referring drawings based on the preferable embodiment. 1 to 6 show an embodiment of the fiber stacking apparatus of the present invention. The fiber stacking apparatus 1 according to the present embodiment includes a rotary drum 2 having an accumulation recess 22 in which raw materials are stacked on the outer peripheral surface 2f, a release air blow means 75 disposed inside the rotary drum 2, and a rotation. And suction means (not shown) connected to the inside of the drum 2. The fiber stacking device 1 is a porous member 27 having a plurality of suction holes for transporting raw materials carried on an air flow generated by suction by suction means from the inside while rotating the rotary drum 2 in the direction of arrow R. A fiber product 30 is obtained by stacking the fibers on the outer surface 22a of the accumulation recess 22 thus formed, and air is blown from the release air blowing means 75 toward the product 30 at a predetermined transfer position (space C). Thus, the fiber stack 30 is configured to be released from the accumulation recess 22.

  More specifically, the fiber stacking apparatus 1 is an absorbent body manufacturing apparatus. As shown in FIGS. 1 and 2, the accumulation recess 22 for accumulating the fiber material 31 and the absorbent particles 32 as raw materials is formed on the outer peripheral surface 2f. A rotating drum 2 that is rotationally driven in the direction of arrow R, a duct 4 that conveys raw materials in a scattered state toward the outer peripheral surface 2f of the rotating drum 2, and a fiber material 31 that is crushed in the duct 4 And a pressing belt 6 that presses down the piled material 30 of the raw material that is disposed along the outer peripheral surface 2f of the rotary drum 2 and is accumulated in the accumulation concave portion 22 adjacent to the downstream side of the duct 4. And a vacuum conveyor 7 as a conveying means disposed below the rotary drum 2.

  As shown in FIGS. 1 and 2, the rotary drum 2 is disposed so as to overlap a cylindrical drum body 20 made of a metal rigid body and an outer peripheral portion of the drum main body 20. The outer peripheral member 21 to be formed is included. The outer peripheral member 21 receives power from a motor such as a motor and rotates around the horizontal axis in the direction of the arrow R. However, the drum body 20 disposed on the inner side of the outer peripheral member 21 is fixed and does not rotate. In the figure, the 2X direction is the circumferential direction of the rotating drum 2, and the 2Y direction is the width direction of the rotating drum 2 (a direction parallel to the rotation axis of the rotating drum 2).

  As shown in FIGS. 3 and 5, non-rotating suction chambers 8, 8 are arranged adjacent to both ends of the rotating drum 2 in the 2Y direction (rotating axis direction of the rotating drum 2). In other words, the rotating drum 2 is disposed between a pair of opposing suction chambers 8 and 8. The suction chamber 8 has a disk shape, and the entire side surfaces 2S and 2S of the rotary drum 2 are covered with the pair of suction chambers 8 and 8. 1 and 2 show a state in which one of the pair of suction chambers 8 and 8 is removed for the explanation of the inside of the drum body 20.

  As shown in FIGS. 1 and 2, the drum body 20 of the rotary drum 2 includes a plurality of mutually independent partitions partitioned by a partition plate 20 p provided from the central axis side of the rotary drum 2 toward the outer peripheral surface 2 f side. It has spaces A, B, C, and D. The drum body 20 has a cylindrical central shaft portion 222 that connects a pair of disk-shaped suction chambers 8 and 8 disposed at both ends of the drum body 20 in the 2Y direction. In the drum body 20, a plurality of metal partition plates 20 p are arranged between the pair of suction chambers 8, 8 from the outer peripheral surface of the central shaft portion 222 toward the outer peripheral surface 2 f side. In the apparatus 1, four sheets are arranged. Each partition plate 22 p extends from the outer peripheral surface of the central shaft portion 222 to the outer peripheral edge of the suction chamber 8. The drum body 20 is divided into four spaces A, B, C, and D, which are separated from each other by the four partition plates 22p.

  An intake fan (not shown) as a suction means is connected to the central shaft portion 222 of the drum body 20, and the pressure in the partitioned spaces A to D in the rotary drum 2 is adjusted by driving the intake fan. In the fiber stacking apparatus 1, the suction force of the region corresponding to the space A that is the upstream region located in the region where the outer peripheral surface 2 f is covered with the duct 4 is the space that is the downstream region. The suction force in the region corresponding to B to D can be made stronger or weaker. Usually, the space B is set to a negative pressure or zero pressure (atmospheric pressure) that is weaker than the space A. From the viewpoint of transportability of the piled articles 30, until the piled articles 30 in the stacking depressions 22 are transferred onto the vacuum conveyor 7, the space B is set to a weak negative pressure so that the piled articles 30 are put into the stacking depressions 22. It is preferable to suck and hold the inside of the space B, but if there is no particular problem with the transportability, the space B preferably has zero pressure in consideration of transferability. In addition, since the spaces C and D are regions including the transfer position of the piled product 30 in the accumulation recess 22 and the front and back thereof, zero pressure or positive pressure is preferable.

  As shown in FIGS. 1 and 2, the duct 4 extends from the pulverizer 5 to the rotating drum 3, and an opening on the downstream side of the duct 4 is in a space A of the rotating drum 2 that is maintained at a negative pressure. The outer peripheral surface 2f located is covered. The pulverizer 5 includes a pulverizer that pulverizes the wood pulp sheet 310 into the fiber material 31 and feeds the fiber material 31 into the duct 4. Between the rotating drum 2 and the pulverizer 5 in the duct 4, a spray pipe 41 that supplies absorbent particles 32, which is a kind of raw material, into the duct 4 is disposed. Due to the operation of the intake fan (not shown) of the rotating drum 2, an air flow that causes the raw materials (fiber material 31 and absorbent particles 32) to flow toward the outer peripheral surface 2 f of the rotating drum 2 is generated in the space in the duct 4. It is like that.

  As shown in FIGS. 1 and 2, the pressing belt 6 is disposed along the outer peripheral surface 2 f of the rotating drum 2 adjacent to the downstream side of the position of the duct 4 of the rotating drum 2. It is arranged along the outer peripheral surface 2f located in the space B set to a negative pressure or zero pressure (atmospheric pressure) that is weaker than the space A. The presser belt 6 is an endless breathable or non-breathable belt, and is stretched over the roll 61 and the roll 62 so as to be rotated along with the rotation of the rotary drum 2. In addition, when the pressing belt 6 is a breathable belt, it is preferable that the raw material in the accumulation recess 22 is not substantially allowed to pass through. Even if the pressure in the space B is set to atmospheric pressure, the presser belt 6 can hold the pile 30 in the stacking recess 22 in the stacking recess 22 until it is transferred onto the vacuum conveyor 7.

  As shown in FIGS. 1 and 2, the vacuum conveyor 7 (conveying means) is disposed below the rotating drum 2, and is a space in which the rotating drum 2 has a weak positive pressure or zero pressure (atmospheric pressure). It is arranged close to the outer peripheral surface 2f located at C. The vacuum conveyor 7 is opposed to the endless breathable belt 73 spanned between the drive roll 71 and the driven rolls 72, 72, and the outer peripheral surface 2 f located in the space C of the rotary drum 2 with the breathable belt 73 interposed therebetween. And a vacuum box 74 disposed at the position. On the vacuum conveyor 7, a covering material 35 made of tissue paper or liquid permeable nonwoven fabric is introduced.

  As shown in FIG. 2, the fiber stacking device 1 includes release air blow means 75 that promotes release of the fiber pile 30 in the accumulation recess 22. The air blowing means 75 is arranged in the space C corresponding to the transfer position (the lowest point of the rotating drum 2) of the piled material 30 in the accumulation recess 22 to the vacuum conveyor 7 in the rotating drum 2. The air blowing means 75 is arranged inside the outer peripheral member 21 in the space C, and from the inner surface side of the porous plate 27 (porous member) that forms the outer surface of the concave portion 22 for accumulation of raw materials. Air can be blown toward the outer surface, and the release of the piled article 30 from the accumulation recess 22 is promoted by the air.

  The outer peripheral member 21 of the rotating drum 2 will be further described. The outer peripheral member 21 is overlapped with the porous plate 27 (porous member) and the outer surface 27a side of the porous plate 27 as shown in FIGS. And a fixed pattern forming plate 28. These plates 27 and 28 are fixed to each other by known fixing means such as bolts or adhesives. An outer surface 22 a of the accumulation concave portion 22, which is a fiber layer on which raw materials are stacked, is formed from a porous plate 27.

  In the present specification, the outer surface of each constituent member (the porous plate 27, the pattern forming plate 28, etc.) of the rotating drum 2 is directed toward the raw material supply side when the raw material is stacked on the constituent member. It is the surface to be. Further, the inner surface of each constituent member is a surface directed to the side opposite to the raw material supply side (the inner side of the rotating drum) when the raw material is stacked.

  The pattern forming plate 28 forms the outer peripheral surface 2 f of the rotary drum 2 and forms the outer shape of the accumulation recess 22. In the present embodiment, the pattern forming plate 28 has an annular shape extending continuously over the entire length in the circumferential direction (2X direction) of the rotating drum 2, and a pair is provided at both ends in the 2Y direction of the outer peripheral surface 2 f of the rotating drum 2. ing. The distance between the pair of pattern forming plates 28 is constant over the entire circumferential length of the rotary drum 2. The pattern forming plate 28 has non-breathability that prevents air from passing therethrough. Here, “non-breathable” includes both “non-breathable that does not allow air to pass through” and “non-breathable that allows a very small amount of air to pass but does not substantially allow air to pass through”. It means sex. As the pattern forming plate 28, for example, a metal plate such as stainless steel or aluminum or a resin plate can be used.

  The porous plate 27 transmits an air flow (vacuum air) generated by suction from the inside of the device (inward of the rotating drum 2) to the outside of the device (outside of the rotating drum 2) and rides on the air flow. It is a breathable plate that keeps the raw material that is being conveyed without allowing it to permeate and allows only air to permeate. The porous plate 27 is formed with a plurality of (multiple) suction holes (pores) penetrating the plate 27 in the thickness direction with a uniform distribution over the entire plate 27, and the accumulation recess 22 is a rotating drum. While passing through the space maintained at a negative pressure in 2, the suction hole functions as an air flow permeation hole. As the porous plate 27, for example, a metal or resin mesh plate, or a metal or resin plate formed with a plurality of (many) pores by etching or punching can be used.

  On the inner surface side of the porous plate 27 in the outer peripheral member 21 of the rotating drum 2, as shown in FIGS. 4 and 5, the porous plate 27 and the drum side wall 25 forming the side surface 2S of the rotating drum 2 are defined. The space portion 26 is formed.

  As shown in FIGS. 4 and 5, the accumulation recess 22 in this embodiment is a depth whose distance from the rotation center of the rotary drum 2 of the porous plate 27 (the central shaft portion 222 of the drum body 20) is relatively short. The concave portion 22D is divided into a shallow concave portion 22S having a relatively long distance. Correspondingly, the space portion 26 is divided into a deep concave portion corresponding portion 26D and a shallow concave portion corresponding portion 26S. That is, the accumulation concave portion 22 includes a deep concave portion 22D and a shallow concave portion 22S, and the rotary drum 2 includes ribs 23 and 24 that divide the space portion 26 into a plurality of regions. Thus, in the plan view of the accumulation recess 22, the space portion 26 includes a deep recess corresponding portion 26 </ b> D that overlaps the deep recess 22 </ b> D of the accumulation recess 22 and a shallow recess that overlaps the shallow recess 22 </ b> S of the accumulation recess 22. It is divided into a corresponding part 26S. Here, “plan view” refers to an object (such as a concave portion for accumulation) viewed from the outside in the normal direction of the outer peripheral surface 2f of the rotating drum 2 (direction perpendicular to the rotating shaft direction of the rotating drum 2). Means the case.

  In the accumulation recess 22, the deep recess 22D is a region having a relatively deep depth from the outer peripheral surface 2f of the rotary drum 2, and the shallow recess 22S is a region having a relatively shallow depth from the outer peripheral surface 2f. is there. In the present embodiment, as will be described later, the raw material suction time is made different between the deep recess 22D and the shallow recess 22S, and the pile 30 formed in the accumulation recess 22 corresponds to the deep recess 22D. The portion to be a high basis weight portion (thick portion) having a relatively large amount of raw material piled up, and the portion corresponding to the shallow recess 22S is a low basis weight portion (thin wall thickness) having a relatively small amount of raw material piled up. Part). That is, the concave portion 22 for accumulation in the present embodiment includes a deep concave portion 22D (high basis weight stacking region) for stacking raw materials at a relatively high basis weight and a shallow portion for stacking raw materials at a relatively low basis weight. It has a recess 22S (low basis weight pile fiber region).

  In this embodiment, as shown in FIGS. 4 and 5, the deep recess 22 </ b> D is located at the center of the rotary drum 2 in the 2Y direction (rotational axis direction), and between the deep recess 22 </ b> D and the drum side wall 25. The shallow recess 22S is located in the center. More specifically, as shown in FIG. 3, the accumulation recess 22 in the present embodiment is continuously formed on the outer peripheral surface 2f of the rotary drum 2 over the entire length in the circumferential direction, and the deep recess 22D is A plurality (four) of the rotary drum 2 are intermittently arranged at the center in the 2Y direction at a predetermined interval in the 2X direction (circumferential direction), and the plurality of deep recesses 22D are respectively surrounded by the shallow recesses 22S. Yes.

  Corresponding to the arrangement of the deep recess 22D and the shallow recess 22S of the stacking recess 22 in this way, in the space portion 26, the deep recess corresponding portion 26D is located at the center of the rotary drum 2 in the 2Y direction. The shallow concave portion corresponding portion 26S is positioned between the deep concave portion corresponding portion 26D and the drum side wall 25.

  As shown in FIGS. 4 and 5, a step is formed at the boundary between the deep recess 22D and the shallow recess 22S, and the porous plate 27 of the deep recess 22D is different from the porous plate 27 of the shallow recess 22S. In a relatively low position (position close to the rotation center of the rotary drum 2). This level | step difference consists of a part (outer part) of the air-impermeable rib 23 which divides the space part 26 into the deep recessed part corresponding part 26D and the shallow recessed part corresponding part 26S. The rib 23 includes the outer portion standing from the periphery of the outer surface of the porous plate 27 of the deep recess 22D toward the shallow recess 22S, and the rotation center of the rotary drum 2 from the periphery of the inner surface of the porous plate 27 of the deep recess 22D. And the inner portion divides the space 26 into a deep recess corresponding portion 26D and a shallow recess corresponding portion 26S.

  Further, as shown in FIG. 4, in the space portion 26, non-breathable ribs 24 extending in the width direction (2Y direction) of the rotating drum are provided at a predetermined interval in the circumferential direction (2X direction) of the rotating drum 2. A plurality of ribs 24 divide the space portion 26 (shallow recess corresponding portion 26S) into a plurality of regions in the 2X direction. The rib 24 is connected to the rib 23 in a region where the rib 23 exists in the central portion in the 2Y direction, and crosses the space portion 26 (shallow recess corresponding portion 26S) in the 2Y direction in a region where the rib 23 does not exist. .

  As described above, a plurality of spaces (spaces A to D) that are partitioned from each other are formed inside the rotary drum 2, and a part (space A) of the plurality of spaces is maintained at a negative pressure. While the accumulation concave portion 22 is conveyed in the same direction by the rotation of the rotary drum 2 in the R direction and passes over the space A maintained at a negative pressure, the outer surface 22a of the concave portion 22 is moved outside the drum. Airflow flows from one side to the other. If the rib 24 is not provided and the space 26 is not divided into a plurality of regions in the 2X direction by the non-breathable member, the air flow can pass through the entire space 26 in the 2X direction. In addition, not only the portion of the accumulation recess 22 that is passing through the space A but also the portion that does not pass through the space A may be affected by the air flow, resulting in inconveniences such as uneven fiber stacking. The rib 24 can effectively prevent such inconvenience.

  As shown in FIGS. 3 and 4, the space 26 can communicate with the outside through a suction opening 29 provided in the drum side wall 25. In the present embodiment, as the suction opening 29, a deep recess dedicated opening 29D that communicates the deep recess 22D and the outside, and a shallow recess dedicated opening 29S that communicates the shallow recess 22S and the outside are provided. Yes. The shallow recess dedicated opening 29S is relatively close to the peripheral edge of the side surface 2S of the rotary drum 2 (relatively far from the rotation center of the rotary drum 2), and the deep concave dedicated opening 29D is relative to the peripheral edge. Is far away (relatively close to the center of rotation of the rotating drum 2). A plurality of shallow recess dedicated openings 29 </ b> S are provided at predetermined intervals in the circumferential direction on the entire peripheral edge of the side surface 2 </ b> S of the rotary drum 2 or the vicinity thereof. The deep recess dedicated opening 29 </ b> D is provided only in the portion corresponding to the deep recess 22 </ b> D on the side surface 2 </ b> S of the rotary drum 2. In the present embodiment, since the four deep recesses 22D are arranged at equal intervals in the 2X direction in the stacking recesses 22 extending over the entire length in the circumferential direction (2X direction) of the rotary drum 2, the rotary drum Also on the second side surface 2S, deep recess dedicated openings 29D are provided in each of the four portions corresponding to the four deep recesses 22D, and three deep recess dedicated openings 29D are provided for each portion.

  Each of the deep recess dedicated opening 29D and the shallow recess dedicated opening 29S has a perfect circular cross section. In this embodiment, the opening diameters of the deep recess dedicated opening 29D and the shallow recess dedicated opening 29S are the same. The size of the opening diameter of the suction opening 29 is proportional to the air volume of the air flow generated by suction by a suction means (not shown). The larger the opening diameter, the larger the air volume of the air flow, and the suction of the raw material. Strength increases. In this embodiment, since the opening diameters of the deep recess dedicated opening 29D and the shallow recess dedicated opening 29S are the same, the deep recess 22D and the shallow recess 22S have the same raw material suction force.

  The deep recess dedicated opening 29D and the shallow recess dedicated opening 29S may have different opening diameters. For example, the deep recess dedicated opening 29D may have a larger opening diameter than that of the shallow recess dedicated opening 29S. good. By making “the opening diameter of the deep recess dedicated opening 29D> the opening diameter of the shallow recess dedicated opening 29S”, the suction force of the raw material in the deep recess 22D is larger than that of the shallow recess 22S, thereby In the piled product 30 formed by stacking raw materials in the recess 22, the basis weight of the high basis weight portion formed corresponding to the deep recess 22D and the low basis weight portion formed corresponding to the shallow recess 22S. The amount difference becomes larger, and the uneven distribution of raw materials can become more remarkable.

  In this embodiment, as shown in FIGS. 4 and 5, the deep recess corresponding portion 26D is located in the center of the rotary drum 2 in the 2Y direction (rotating axis direction), and the deep recess corresponding portion 26D is sandwiched by 2Y. When the shallow concave portion corresponding part 26S is located on both sides in the direction, the shallow concave portion corresponding part 26S is interposed between the deep concave portion corresponding part 26D and the drum side wall 25 as described above. A suction pipe 223 connecting the deep recess corresponding portion 26D and the deep recess dedicated opening 29D provided in the drum side wall 25 crosses the shallow recess corresponding portion 26S in the 2Y direction.

  The suction tube 223 has a cylindrical shape. When the piled material 30 in the accumulation recess 22 is transferred onto the vacuum conveyor 7, air is ejected from the release air blowing means 75, and the air passes through a transfer opening 224 described later to enter the space. Depending on the shape of the suction pipe 223 that flows into the portion 26 (shallow concave portion corresponding portion 26S and deep concave portion corresponding portion 26D) and goes to the porous plate 27, the shallow concave portion corresponding portion 26S crosses in the 2Y direction. There is a possibility that the air blowing by the release air blowing means 75 is hindered and the transfer process of the piled article 30 is affected. From this point of view, in this embodiment, the shape of the suction tube 223 is a cylindrical shape that is relatively difficult to inhibit the air flow.

  The shallow recess corresponding portion 26S is adjacent to the drum side wall 25 provided with the shallow recess dedicated opening 29S without any distance, so that the drum side wall 25 (depression dedicated opening 29S) such as the suction pipe 223 is used. Does not require piping extending from One shallow recess dedicated opening 29 </ b> S is arranged in each region of the shallow recess corresponding portion 26 </ b> S divided into a plurality of regions in the circumferential direction (2X direction) of the rotary drum 2 by the ribs 24.

  As shown in FIG. 4, a transfer opening 224 through which air from the mold release air blowing means 75 (see FIG. 2) can pass is provided on the opposite side of the space 26 from the porous plate 27. . The transfer opening 224 is defined by a pair of drum side walls 25, 25, and is a transfer opening shared by the deep recess corresponding part 26D and the shallow recess corresponding part 26S.

  The pair of suction chambers 8 and 8 are non-rotating members for controlling suction by the suction openings 29 (29D and 29S), and as shown in FIGS. 3 and 5, both side surfaces 2S and 2S of the rotary drum 2 are used. Are arranged so as to cover the suction opening 29. The suction chamber 8 itself is non-breathable and is made of, for example, a metal plate such as stainless steel or aluminum, or a resin plate.

  As shown in FIGS. 2 and 3, the suction chamber 8 includes a suction region 80 that connects the suction opening 29 and a suction means (not shown), and a non-suction region 81 that closes the suction opening 29. Along the circumferential direction (2X direction) of the rotating drum 2. The suction region 80 is an opening formed in a surface facing the side surface 2S of the rotating drum 2 in the suction chamber 8, and has the same curvature as that of the disk-shaped suction chamber 8 (the rotating drum 2) in a plan view of the side surface 2S. It has an arc shape with a radius. Since the non-suction area 81 is not perforated and the non-suction area 81 is non-breathable, the suction opening 29 (29D, 29S) is covered with the non-suction area 81. Suction by a suction means (not shown) is inhibited.

  In the present embodiment, as the suction region 80, a deep recess dedicated suction region 80D corresponding to the deep recess dedicated opening 29D and a shallow recess dedicated suction region 80S corresponding to the shallow recess dedicated opening 29S are respectively provided on the rotary drum 2. Are provided along the circumferential direction (2X direction). The deep concave dedicated suction area 80D and the shallow concave dedicated suction area 80S are different in position in the radial direction of the disc-shaped suction chamber 8, and the shallow concave dedicated suction area 80S extends from the periphery of the side surface 2S of the rotary drum 2. The position is relatively close (relatively far from the rotation center of the rotating drum 2), and the deep recess dedicated suction region 80D is relatively far from the peripheral edge (relatively close to the rotation center of the rotating drum 2). It is in.

  As shown in FIGS. 2 and 3, the deep recess dedicated suction region 80D is longer in the circumferential direction (2X direction) of the rotary drum 2 than the shallow recess dedicated suction region 80S. The length of the suction region 80 (80D, 80S) along the 2X direction is proportional to the suction time by the suction means (not shown), and the longer the length, the corresponding portion of the accumulation recess 22 (the deep recess) 22D or shallow recess 22S), the raw material suction time becomes longer. As described above, in this embodiment, since the opening diameters of the deep recess dedicated opening 29D and the shallow recess dedicated opening 29S are the same, the deep recess 22D and the shallow recess 22S have the same raw material suction force. However, since the deep recess dedicated suction region 80D corresponding to the deep recess 22D is longer in the 2X direction than the shallow recess dedicated suction region 80S corresponding to the shallow recess 22S, the deep recess 22D is shallower. The suction time of the raw material becomes longer than 22S. Accordingly, the deep concave portion 22D has a larger amount of raw material than the shallow concave portion 22S.

  As shown in FIG. 2, the deep recess dedicated suction area 80D is a space A of the drum body 20 in the suction chamber 8 (an area where the outer peripheral surface is covered with the duct 4 and is drawn by an intake fan as suction means (not shown). The end portion 80Df on the upstream side in the drum rotation direction R of the deep recess dedicated suction region 80D extends continuously over substantially the entire length in the circumferential direction of the region corresponding to the space (the space of the rotating drum 2 maintained at negative pressure). Is located in the vicinity of the boundary between the space A and the space D (partition plate 20p), and the downstream end 80Dr located on the opposite side is the boundary between the space A and the space B (partition plate 20p). It is located in the vicinity. On the other hand, in the shallow recess dedicated suction area 80S whose length in the 2X direction is shorter than the deep recess dedicated suction area 80D, the upstream end 80Sf in the drum rotation direction R is an intermediate position of the space A, more specifically, The upstream end 80Df of the deep recess dedicated suction area 80D is located downstream of the drum rotation direction R, and the downstream end 80Sr is connected to the downstream end 80Dr and 2X of the deep recess dedicated suction area 80D. In the same position in the direction.

  As shown in FIG. 5, each of the pair of suction chambers 8, 8 has a center space 82 inside the center corresponding to the center shaft portion 222 of the drum body 20, and each of the pair of suction chambers 8, 8. The central space portion 82 and the internal space of the central shaft portion 222 of the drum main body 20 positioned therebetween communicate with each other. Further, inside the suction chamber 8, each of the deep recess dedicated suction region 80 </ b> D and the shallow recess dedicated suction region 80 </ b> S communicates with the central space 82, and a flow path of an air flow generated by suction by a suction means (not shown). Passages 83 and 84 functioning as are provided. The passage 83 communicates the deep recess dedicated suction region 80D and the central space portion 82, and the passage 84 communicates the shallow concave dedicated suction region 80S and the central space portion 82.

  As shown in FIGS. 1 and 2, a region corresponding to the suction region 80 (80D, 80S) inside the rotary drum 2 (drum body 20), that is, a region overlapping the suction region 80 in a side view is used for transfer. A non-rotating suction suppression plate 9 that closes the opening 224 is disposed along the circumferential direction (2X direction) of the rotating drum 2. The suction suppression plate 9 extends continuously over substantially the entire length in the circumferential direction of the space A of the drum body 20 (a region where the outer peripheral surface is covered with the duct 4), similarly to the deep recess dedicated suction region 80 </ b> D. In the side view of the drum body 20, the drum body 20 has an arc shape having the same radius of curvature as the drum body 20 (suction chamber 8). The suction suppression plate 9 is fixed to a surface facing the rotating drum 2 in one or both of the pair of suction chambers 8 and 8. The suction suppression plate 9 is not disposed in the spaces B, C, and D of the drum body 20. The suction suppression plate 9 is non-breathable and is made of, for example, a metal plate such as stainless steel or aluminum, or a resin plate.

  Next, operation | movement of the fiber stacking apparatus 1 mentioned above is demonstrated based on the method of manufacturing an absorber continuously using this. In the manufacturing method of this embodiment, the raw material conveyed while riding the air flow generated by suction from the inside by the suction means (not shown) connected to the inside of the rotating drum 2 while rotating the rotating drum 2. In a predetermined fiber transfer step, the fiber material 31 and the absorbent particles 32 are stacked on the outer surface 22a of the accumulation recess 22 formed by the porous plate 27 to obtain the fiber product 30; There is a transfer step in which air is blown from the release air blowing means 75 toward the piled article 30 so that the piled article 30 is released from the accumulation recess 22 and transferred to the vacuum conveyor 7 (conveying means).

  First, an intake fan (not shown) as suction means connected to the space A in the rotary drum 2 and the vacuum box 74 is operated to make negative pressure. As described above, the rotary drum 2 is connected to the suction means via the suction chamber 8. Further, the rotating drum 2 (outer peripheral member 21) is rotated in the direction indicated by the symbol R in the figure, and the pressing belt 6 is operated. As described above, the pair of suction chambers 8, 8 arranged on both sides in the width direction (2Y direction) of the rotating drum 2 is non-rotating, and the non-rotating drum body sandwiched between the suction chambers 8, 8. The outer peripheral member 21 rotates around the outer peripheral portion 20.

  Next, the pulverizer 5 is operated to supply the fiber material 31 obtained by pulverizing the wood pulp sheet 310 into the duct 4. In addition, the absorbent particles 32 are supplied into the duct 4 by a spray pipe 41 disposed in the duct 4.

  When the accumulation recess 22 of the rotary drum 2 passes through the space A covered with the duct 4 and maintained at a negative pressure, as shown in the upper half of FIG. The suction area 80 allows the suction openings 29 provided on the two side surfaces 2S and 2S of the rotary drum 2 to communicate with suction means (not shown), and the transfer opening 224 is closed by the suction suppression plate 9. Is done.

  More specifically, when the accumulation recess 22 passes through the space D and is introduced into the space A, the deep recess dedicated opening 29D corresponding to the deep recess 22D of the recess 22 and the deep recess of the suction chamber 8 are provided. The dedicated suction area 80 </ b> D overlaps and communicates, and the transfer opening 224 is closed by the suction suppression plate 9. On the other hand, due to the fact that the shallow recess dedicated suction region 80S is located downstream of the deep recess dedicated suction region 80D in the drum rotation direction R, the accumulation recess 22 is initially introduced on the space A. It is a non-opening portion (non-suction region 81) of the suction chamber 8 that overlaps with the shallow-recess opening 29S corresponding to the shallow recess 22S, and the shallow-recess opening 29S is obstructed by the non-opening. . Therefore, the suction force by the suction means acts only on the deep recess 22D from when the stacking recess 22 is introduced into the space A until it reaches the shallow recess dedicated suction area 80S (the initial stage of the stacking step). However, it does not act on the shallow recess 22S. As a result, an air flow (vacuum air) is generated in the duct 4 by conveying the raw materials (fiber material 31 and absorbent particles 32) to the outer peripheral surface 2f of the rotary drum 2 by the suction force generated in the deep recess 22D. The raw material carried on the air flow is selectively stacked only in the deep recess 22D in the accumulation recess 22.

  Next, as the outer circumferential member 21 rotates, the accumulation recess 22 travels in the rotation direction R in the space A and reaches the shallow recess dedicated suction area 80S, and the shallow recess dedicated corresponding to the shallow recess 22S of the recess 22 is reached. The opening 29S and the suction area 80S dedicated to the shallow recess of the suction chamber 8 are overlapped and communicated with each other, and the latter stage of the fiber stacking process is started. At this time, the deep recess dedicated opening 29D of the stacking recess 22 and the deep recess dedicated suction area 80D of the suction chamber 8 continue to communicate with each other, and the transfer opening 224 is closed by the suction suppression plate 9 It is in. As a result, the suction force by the suction means acts not only on the deep recess 22D but also on the shallow recess 22S, and the raw material transported in the air flow piles up in the shallow recess 22S. In this manner, raw materials (fiber material 31 and absorbent particles 32) are stacked in the accumulation recess 22 to form the stacked product 30.

  Next, when the accumulation recess 22 passes through the space A and is introduced into the space B as the outer peripheral member 21 rotates, the non-suction region of the pair of suction chambers 8 and 8 is formed inside the rotary drum 2. 81 closes the suction openings 29 (29 </ b> D, 29 </ b> S) provided on both side surfaces 2 </ b> S, 2 </ b> S of the rotary drum 2 and releases the blockage of the transfer openings 224 by the suction suppression plate 9. As a result, the suction force by the suction means does not act on the accumulation recess 22 at all. The non-suction state of the accumulation recess 22 is maintained even while the accumulation recess 22 passes over the spaces C and D. On the other hand, outside the rotating drum 2, as shown in FIGS. 1 and 2, the pile 30 of the accumulation concave portion 22 that has passed through the space A and has been introduced onto the space B is pressed by the pressing belt 6. .

  The pressing of the pile 30 by the pressing belt 6 is released immediately before the accumulation concave portion 22 passes over the space B. When the accumulation concave portion 22 passes over the space B and is introduced onto the space C as the outer peripheral member 21 rotates, the release air blow means at a predetermined transfer position (the lowest point of the rotating drum 2). Air is blown from 75 to the accumulation recess 22 through the transfer opening 224 (transfer process).

  In the space C, the suction suppression plate 9 that has closed the transfer opening 224 in the space A does not exist, the transfer opening 224 is open, and the suction opening 29 on the side surface 2S of the rotary drum 2. Since (29D, 29S) is covered with the non-suction area 81 of the suction chamber 8, as shown in FIG. 6, the air (indicated by arrows in the figure) ejected from the release air blowing means 75 is porous plate 27. Hit the whole area. By pressing from the inner side to the outer side with such air and suction from the vacuum box 74, the entire pile 30 is released smoothly from the stacking recess 22 without being destroyed, and the vacuum conveyor 7 is transferred. Therefore, according to the fiber stacking apparatus 1 of this embodiment, since the transferability of the fiber pile in the accumulation recess 22 of the rotary drum 2 is excellent, an absorbent body having a particularly different basis weight is used as the peripheral portion. Can be efficiently produced without causing chipping or the like.

  Conventionally, in this type of fiber stacking apparatus, the suction opening and the transfer opening are the same, but the fiber stacking apparatus 1 of the present embodiment has the suction opening 29 (29D, 29S) and The main feature is that the transfer opening 224 is provided separately. That is, an opening 29 dedicated to suction is provided at a position completely different from the transfer opening 224 (side surface 2S of the rotating drum 2), and the opening 29 is dedicated to a deep recess dedicated opening for forming a high basis weight pile fiber region. By dividing the portion 29D and the shallow recess dedicated opening 29S for forming the low basis weight pile fiber region, the suction time of each portion in the accumulation recess 22 can be controlled independently, whereby the basis weight is partially Realizes the manufacture of different piles (uneven distribution of raw materials). Further, in the fiber stacking apparatus 1 of the present embodiment, the uneven distribution of the raw material is realized by providing the suction opening 29 separately from the transfer opening 224 as described above. It is not necessary to apply a device for uneven distribution of the raw material such as making part of the portion 224 non-breathable to partially reduce the suction force, and the air by air blow is not necessary. It is not necessary to adopt a configuration that can obstruct the passage of the. In particular, in the present embodiment, the space 26 (26D, 26S) between the release air blowing means 75 and the porous plate 27 has thin ribs 23, 24 and a cylindrical suction. Since only the tube 223 is present and there is no member that substantially obstructs the air blown from the release air blowing means 75, the transfer property of the piled article 30 is excellent.

  FIG. 7 shows a part of the piled article 30 immediately after being released from the accumulation recess 22 of this embodiment. As shown in FIG. 7, in the pile 30, the portion corresponding to the deep recess 22 </ b> D of the accumulation recess 22 becomes a high basis weight portion (thick portion) 33 with a relatively large amount of raw material, and is shallow. A portion corresponding to the concave portion 22S is a low basis weight portion (thin portion) 34 with a relatively small amount of raw material accumulated. Further, one surface 30b of the fiber stack 30 (surface opposite to the contact surface with the outer surface 22a of the recess 22) is substantially flat throughout, while the other surface 30a (the outer surface 22a of the recess 22 and ) Has a step at the boundary between the high basis weight portion 33 and the low basis weight portion 34, and is not flat.

  After the piled material 30 is transferred to the covering material 35, both side portions along the conveying direction of the covering material 35 are folded back to the piled material 30 side, and the upper and lower surfaces of the piled material 30 are covered with the covering material 35. An absorber is obtained by cutting the object 30 and the covering material 35 into a predetermined length.

  In the absorbent body thus obtained, the absorbent core made of the piled product 30 includes a high basis weight portion 33 having a relatively high basis weight and a low basis weight portion 34 having a relatively low basis weight, and the absorbent body. The amount of fiber in the raw material is partially different. The absorbent body is of high quality suitable as an absorbent body used for absorbent articles such as disposable diapers, sanitary napkins, and incontinence pads. In particular, the absorbent body used in the disposable diaper is used by being incorporated in an absorbent article so that the high basis weight portion 33 is on the ventral side (front side) and the low basis weight portion 34 is on the back side (rear side). It is preferable in terms of maximizing the performance of the absorber. As described above, forming a high basis weight part and a low basis weight part having different basis weights (amount of raw material accumulated) in the absorbent body has advantages such as obtaining an absorbent body that is flexible and improved in wearing feeling. . In particular, an absorbent body in which a low basis weight part is formed before and after or around a high basis weight part is flexible and excellent in wearing feeling.

  The absorbent body produced in the present invention is preferably used as an absorbent body for absorbent articles. The absorbent article is mainly used to absorb and retain body fluids excreted from the body such as urine and menstrual blood. Absorbent articles include, for example, disposable diapers, sanitary napkins, incontinence pads, panty liners, etc., but are not limited to these, and widely include articles used to absorb liquid discharged from the human body. To do. The absorbent body (stacked fiber product) that can be produced in the present invention is not limited to those having a high basis weight part and a low basis weight part, such as the stacked fiber product 30, for example, an absorbent body having a uniform basis weight, Or the absorber etc. which have the space part which a notch or absorber material does not exist in part are included.

  The absorbent article typically includes a top sheet, a back sheet, and a liquid-retaining absorbent body disposed between both sheets. The upper and lower surfaces of the absorber may be covered with one or a plurality of core wrap sheets. The back sheet may or may not have water vapor permeability. The absorbent article may further include various members according to specific uses of the absorbent article. Such members are known to those skilled in the art. For example, when the absorbent article is applied to a disposable diaper or a sanitary napkin, a pair or two or more pairs of three-dimensional guards can be arranged on the outer side of both sides of the absorbent body.

  This invention is not restrict | limited to the said embodiment, It can change suitably. For example, in the above-described embodiment, the pair of suction chambers 8 are disposed on both sides of the rotating drum 2 in the 2Y direction. However, the suction chamber 8 is disposed only on one side (for example, the drive side) of the rotating drum 2 in the 2Y direction. May be. Moreover, in the said embodiment, although the recessed part 22 for accumulation | stacking was continuously formed in the outer peripheral surface 2f of the rotating drum 2 over the full length of the circumferential direction, you may form intermittently in the circumferential direction. In addition to the embodiment of the present invention described above, the following additional notes (a method for manufacturing a fiber stacking apparatus and an absorbent body) are disclosed.

<1>
A rotating drum having an accumulation concave portion on which the raw material is piled on the outer peripheral surface, a release air blowing means disposed inside the rotating drum, and a suction means connected to the inside of the rotating drum, While rotating the rotating drum, the raw material carried on the air flow generated by suction by the suction means from the inside is placed on the outer surface of the accumulation recess formed by the porous member having a plurality of suction holes. The piled product is obtained by stacking, and the piled product is released from the accumulation recess by blowing air from the release air blowing means toward the piled product at a predetermined transfer position. A textile device,
A space portion defined by the porous member and a drum side wall forming a side surface of the rotating drum is formed on the inner surface side of the porous member, and the space portion is provided for suction provided on the drum side wall. It can communicate with the outside through the opening,
On the opposite side of the space portion from the porous member, there is provided a transfer opening through which air from the release air blowing means can pass,
A non-rotating suction chamber for controlling suction by the suction opening is disposed adjacent to the end of the rotating drum in the rotation axis direction so as to cover the suction opening. A suction region that communicates the opening and the suction means, and a non-suction region that closes the suction opening, along the circumferential direction of the rotating drum,
In a region corresponding to the suction region inside the rotating drum, a non-rotating suction suppression plate that closes the transfer opening is disposed along the circumferential direction of the rotating drum,
When the accumulation recess passes through the suction area, the suction opening and the suction means are communicated by the suction area, and the transfer opening is closed by the suction suppression plate,
When the accumulation recess passes through the non-suction area, the non-suction area closes the suction opening, and the suction suppression plate unblocks the transfer opening. A fiber stacking apparatus in which air is blown from the release air blowing means to the accumulation concave portion through the transfer opening at a transfer position.

<2>
The rotating drum is configured to include a cylindrical drum body and an outer peripheral member that is arranged on the outer periphery of the drum body and forms an outer peripheral surface of the rotating drum, and the outer member rotates. The fiber stacking apparatus according to <1>, wherein the drum body is fixed and does not rotate.
<3>
The fiber stacking apparatus according to <2>, wherein the drum main body has a plurality of mutually independent spaces partitioned by a partition plate provided from a central axis side of the rotating drum toward an outer peripheral surface side. .
<4>
The accumulation recess is composed of a deep recess having a relatively short distance from the rotation center of the rotary drum of the porous member, and a shallow recess having a relatively long distance.
The rotating drum has a rib that divides the space portion into a plurality of regions, and the space portion is a deep recess corresponding portion that is a portion overlapping the deep recess in a plan view of the accumulation recess. , The shallow concave portion corresponding to the shallow concave portion,
<1> to <3, wherein the suction opening includes a deep recess dedicated opening that communicates the deep recess and the outside, and a shallow recess dedicated opening that communicates the shallow recess and the exterior. > The fiber stacking apparatus according to any one of the above.

<5>
The deep recess corresponding portion is located in a central portion in the rotation axis direction of the rotary drum, and the shallow recess corresponding portion is positioned between the deep recess corresponding portion and the drum side wall,
The stacked fiber according to <4>, wherein a suction pipe connecting the deep recess corresponding portion and the deep recess dedicated opening provided in the drum side wall crosses the shallow recess corresponding portion in the rotation axis direction. apparatus.
<6>
The fiber stacking device according to <5>, wherein the suction tube has a cylindrical shape.
<7>
The deep recess is located in a central portion of the rotary drum in the rotation axis direction, and the shallow recess is located between the deep recess and the drum side wall. Any one of <4> to <6> The fiber stacking apparatus according to item.
<8>
The concave portion for accumulation is continuously formed on the outer peripheral surface of the rotating drum over the entire length in the circumferential direction, and the deep concave portion is centered in the rotational axis direction at a predetermined interval in the circumferential direction of the rotating drum. The fiber stacking apparatus according to any one of <4> to <7>, wherein a plurality of the deep recesses are intermittently arranged in the portion, and each of the plurality of deep recesses is surrounded by the shallow recess.
<9>
A step is formed at a boundary portion between the deep recess and the shallow recess, and the step includes a part of the rib that divides the space portion into the deep recess corresponding portion and the shallow recess corresponding portion. The fiber stacking apparatus according to any one of <4> to <8>.
<10>
The rib includes an outer portion standing from the periphery of the outer surface of the porous member of the deep recess toward the shallow recess, and a periphery of the inner surface of the porous member of the deep recess toward the rotation center of the rotary drum. <4> to <9>, wherein the inner portion divides the space portion into the deep concave portion corresponding portion and the shallow concave portion corresponding portion. The fiber stacking apparatus described in 1.
<11>
In the space portion, a plurality of ribs extending in the rotation axis direction of the rotating drum are provided at predetermined intervals in the circumferential direction of the rotating drum, and the space portion is formed in the circumferential direction by the plurality of ribs. The fiber stacking apparatus according to any one of <4> to <10>, wherein the fiber stacking apparatus is divided into a plurality of regions.

<12>
As the suction area, a deep recessed dedicated suction area corresponding to the deep recessed dedicated opening and a shallow recessed dedicated suction area corresponding to the shallow recessed dedicated opening are provided along the circumferential direction of the rotating drum, respectively. The deep recess dedicated suction area is the fiber stacking apparatus according to any one of <4> to <11>, wherein the circumferential length is longer than the shallow concave dedicated suction area.
<13>
The fiber stacking apparatus according to any one of <4> to <12>, wherein the opening diameters of the deep recess dedicated opening and the shallow recess dedicated opening are different.
<14>
<12> or <13> wherein the deep recess dedicated suction region continuously extends over substantially the entire length in the circumferential direction of a region corresponding to a space maintained at a negative pressure by the suction means in the drum body. The fiber stacking apparatus described in 1.
<15>
<12> The end on the downstream side in the rotation direction of the rotary drum of the shallow recess dedicated suction region is located at the same position in the circumferential direction as the end on the downstream side of the rotary drum in the rotational direction of the rotary drum The fiber stacking apparatus according to any one of to <14>.
<16>
Inside the suction chamber, a central space portion corresponding to the central shaft portion of the drum body and a passage functioning as a flow path of an air flow generated by suction by the suction means are provided. The fiber stacking device according to any one of <12> to <15>, wherein each of the deep recess dedicated suction region and the shallow recess dedicated suction region communicates with the central space portion.
<17>
Any one of <1> to <16>, further comprising: a duct that conveys the raw material in a scattered state toward the outer peripheral surface of the rotating drum; and a pulverizer that pulverizes and supplies the fiber material as the raw material into the duct. The fiber stacking apparatus according to claim 1.

<18>
A product provided with a rotating drum having an accumulation concave portion on which the raw material is piled on the outer peripheral surface, a release air blow means disposed inside the rotating drum, and a suction means connected to the inside of the rotating drum. Using a fiber device,
On the outer surface of the accumulation recess formed by the porous member having a plurality of suction holes, the raw material transported on the air flow generated by suction by the suction means from the inside while rotating the rotary drum A fiber-sending process to obtain a fiber product
And a transfer step of releasing the piled product from the stacking recess by blowing air from the release air blowing means toward the piled product at a predetermined transfer position. Because
A space portion defined by the porous member and a drum side wall forming a side surface of the rotating drum is formed on the inner surface side of the porous member, and the space portion is provided for suction provided on the drum side wall. It can communicate with the outside through the opening,
On the opposite side of the space portion from the porous member, there is provided a transfer opening through which air from the release air blowing means can pass,
A non-rotating suction chamber for controlling suction by the suction opening is disposed at an end of the rotating drum in the rotation axis direction so as to cover the suction opening, and the suction chamber is connected to the suction opening. A suction area that communicates with the suction means, and a non-suction area that closes the suction opening, along the circumferential direction of the rotary drum,
In a region corresponding to the suction region inside the rotating drum, a non-rotating suction suppression plate that closes the transfer opening is disposed along the circumferential direction of the rotating drum,
In the fiber stacking step, the suction opening and the suction means are communicated by the suction region, the transfer opening is closed by the suction suppression plate, and an air flow generated by suction by the suction means is generated. , Through the porous member from the outside of the device and into the device,
In the transfer step, the suction opening is closed by the non-suction region, and the transfer opening is blocked by the suction suppression plate, and the release air blow means is released from the mold release air blow unit at a predetermined transfer position. A method for manufacturing an absorbent body, wherein air is blown against the concave portion for accumulation through an opening for transfer.

<19>
The rotating drum is configured to include a cylindrical drum body and an outer peripheral member that is arranged on the outer periphery of the drum body and forms an outer peripheral surface of the rotating drum, and the outer member rotates. The drum body manufacturing method according to <18>, wherein the drum body is fixed and does not rotate.
<20>
The absorbent body according to <19>, wherein the drum body has a plurality of mutually independent spaces partitioned by a partition plate provided from a central axis side of the rotating drum toward an outer peripheral surface side. Production method.
<21>
The accumulation recess is composed of a deep recess having a relatively short distance from the rotation center of the rotary drum of the porous member, and a shallow recess having a relatively long distance.
The rotating drum has a rib that divides the space portion into a plurality of regions, and the space portion is a deep recess corresponding portion that is a portion overlapping the deep recess in a plan view of the accumulation recess. , The shallow concave portion corresponding to the shallow concave portion,
<18> to <20, wherein the suction opening is provided with a deep recess dedicated opening that communicates the deep recess with the outside, and a shallow recess dedicated opening that communicates the shallow recess with the outside. The manufacturing method of the absorber as described in any one of>.

<22>
The deep recess corresponding portion is located in a central portion in the rotation axis direction of the rotary drum, and the shallow recess corresponding portion is positioned between the deep recess corresponding portion and the drum side wall,
The absorber according to <21>, wherein a suction pipe connecting the deep recess corresponding portion and the deep recess dedicated opening provided in the drum side wall crosses the shallow recess corresponding portion in the rotation axis direction. Manufacturing method.
<23>
The method for manufacturing an absorbent body according to <22>, wherein the suction tube has a cylindrical shape.
<24>
The deep recess is located in a central portion of the rotating drum in the rotation axis direction, and the shallow recess is located between the deep recess and the drum side wall. Any one of <21> to <23> The manufacturing method of the absorber as described in a term.
<25>
The concave portion for accumulation is continuously formed on the outer peripheral surface of the rotating drum over the entire length in the circumferential direction, and the deep concave portion is centered in the rotational axis direction at a predetermined interval in the circumferential direction of the rotating drum. The method for producing an absorbent body according to any one of <21> to <24>, wherein a plurality of the deep recesses are intermittently arranged in the portion, and each of the plurality of deep recesses is surrounded by the shallow recess.
<26>
A step is formed at a boundary portion between the deep recess and the shallow recess, and the step includes a part of the rib that divides the space portion into the deep recess corresponding portion and the shallow recess corresponding portion. The manufacturing method of the absorber as described in any one of said <21>-<25>.
<27>
The rib includes an outer portion standing from the periphery of the outer surface of the porous member of the deep recess toward the shallow recess, and a periphery of the inner surface of the porous member of the deep recess toward the rotation center of the rotary drum. <21> to <26>, wherein the inner portion divides the space portion into the deep concave portion corresponding portion and the shallow concave portion corresponding portion. The manufacturing method of the absorber as described in 1 ..
<28>
In the space portion, a plurality of ribs extending in the rotation axis direction of the rotating drum are provided at predetermined intervals in the circumferential direction of the rotating drum, and the space portion is formed in the circumferential direction by the plurality of ribs. The manufacturing method of the absorber as described in any one of said <21>-<27> currently divided into several area | region.

<29>
As the suction area, a deep recessed dedicated suction area corresponding to the deep recessed dedicated opening and a shallow recessed dedicated suction area corresponding to the shallow recessed dedicated opening are provided along the circumferential direction of the rotating drum, respectively. The method for producing an absorbent body according to any one of <21> to <28>, wherein the deep recess dedicated suction region is longer in the circumferential direction than the shallow recess dedicated suction region.
<30>
The manufacturing method of the absorber as described in any one of said <21>-<29> from which an opening diameter differs in the said opening only for a deep recessed part, and the said opening only for a shallow recessed part.
<31>
<29> or <30>, wherein the deep recess dedicated suction region continuously extends over substantially the entire length in the circumferential direction of a region corresponding to a space maintained at a negative pressure by the suction means in the drum body. The manufacturing method of the absorber as described in 1 ..
<32>
<29> The end on the downstream side in the rotation direction of the rotary drum of the shallow recess dedicated suction region is located at the same position in the circumferential direction as the end on the downstream side of the rotary drum in the rotational direction of the rotary drum The manufacturing method of the absorber as described in any one of-<31>.
<33>
Inside the suction chamber, a central space portion corresponding to the central shaft portion of the drum body and a passage functioning as a flow path of an air flow generated by suction by the suction means are provided. The method for manufacturing an absorbent body according to any one of <29> to <32>, wherein each of the deep recess dedicated suction region and the shallow recess dedicated suction region communicates with the central space portion.
<34>
In the fiber stacking step, the deep concave portion has a longer suction time of the raw material than the shallow concave portion, whereby the deep concave portion has a relatively higher basis weight than the shallow concave portion. The manufacturing method of the absorber as described in any one of said <29>-<33> which obtains.
<35>
<18> including the duct for conveying the raw material in a scattered state toward the outer peripheral surface of the rotating drum, and the pulverizer for pulverizing and supplying the fiber material as the raw material in the duct. The manufacturing method of the absorber as described in any one of-<34>.

DESCRIPTION OF SYMBOLS 1 Stacking apparatus 2 Rotating drum 20 Drum main body 21 Outer periphery member 22 Concave part for accumulation | aggregation 22a Outer surface of the recessed part for accumulation | aggregation 22D Deep recessed part of the recessed part for accumulation | stacking (high basic weight accumulation fiber area)
22S Shallow concave portion for accumulation (low basis weight pile fiber region)
23, 24 Rib 25 Drum side wall 26 Space 26D Space corresponding to deep recess 26S Space corresponding to shallow recess 27 Porous plate (porous member)
28 Pattern Forming Plate 29 Suction Opening 29D Deep Recess Dedicated Opening 29S Shallow Recess Dedicated Opening 223 Suction Pipe 224 Transfer Opening 5 Crusher 6 Pressing Belt 7 Vacuum Conveyor (Conveying Means)
75 Air blow means for mold release 8 Suction chamber 80 Suction area 80D Suction area dedicated to deep recess 80S Suction area dedicated to shallow recess 81 Non-suction area 9 Suction suppression plate 30 Fiber pile 31 Fiber material 32 Absorbent particles 33 High basis weight section 34 Low Basis weight part

Claims (7)

A rotating drum having an accumulation concave portion on which the raw material is piled on the outer peripheral surface, a release air blowing means disposed inside the rotating drum, and a suction means connected to the inside of the rotating drum, While rotating the rotating drum, the raw material carried on the air flow generated by suction by the suction means from the inside is placed on the outer surface of the accumulation recess formed by the porous member having a plurality of suction holes. The piled product is obtained by stacking, and the piled product is released from the accumulation recess by blowing air from the release air blowing means toward the piled product at a predetermined transfer position. A textile device,
A space portion defined by the porous member and a drum side wall forming a side surface of the rotating drum is formed on the inner surface side of the porous member, and the space portion is provided for suction provided on the drum side wall. It can communicate with the outside through the opening,
On the opposite side of the space portion from the porous member, there is provided a transfer opening through which air from the release air blowing means can pass,
A non-rotating suction chamber for controlling suction by the suction opening is disposed adjacent to the end of the rotating drum in the rotation axis direction so as to cover the suction opening. A suction region that communicates the opening and the suction means, and a non-suction region that closes the suction opening, along the circumferential direction of the rotating drum,
In a region corresponding to the suction region inside the rotating drum, a non-rotating suction suppression plate that closes the transfer opening is disposed along the circumferential direction of the rotating drum,
When the accumulation recess passes through the suction area, the suction opening and the suction means are communicated by the suction area, and the transfer opening is closed by the suction suppression plate,
When the accumulation recess passes through the non-suction area, the non-suction area closes the suction opening, and the suction suppression plate unblocks the transfer opening. A fiber stacking apparatus in which air is blown from the release air blowing means to the accumulation concave portion through the transfer opening at a transfer position. The accumulation recess is composed of a deep recess having a relatively short distance from the rotation center of the rotary drum of the porous member, and a shallow recess having a relatively long distance.
The rotating drum has a rib that divides the space portion into a plurality of regions, and the space portion is a deep recess corresponding portion that is a portion overlapping the deep recess in a plan view of the accumulation recess. , The shallow concave portion corresponding to the shallow concave portion,
2. The product according to claim 1, wherein the suction opening includes a deep recess dedicated opening that connects the deep recess and the outside, and a shallow recess dedicated opening that connects the shallow recess and the outside. Textile equipment. The deep recess corresponding portion is located in a central portion in the rotation axis direction of the rotary drum, and the shallow recess corresponding portion is positioned between the deep recess corresponding portion and the drum side wall,
The fiber stacking apparatus according to claim 2, wherein a suction pipe connecting the deep recess corresponding portion and the deep recess dedicated opening provided in the drum side wall crosses the shallow recess corresponding portion in the rotation axis direction. .   The fiber stacking apparatus according to claim 3, wherein the suction pipe has a cylindrical shape.   As the suction area, a deep recessed dedicated suction area corresponding to the deep recessed dedicated opening and a shallow recessed dedicated suction area corresponding to the shallow recessed dedicated opening are provided along the circumferential direction of the rotating drum, respectively. 5. The fiber stacking device according to claim 2, wherein the deep recess dedicated suction region is longer in the circumferential direction than the shallow recess dedicated suction region.   The fiber stacking apparatus according to any one of claims 2 to 5, wherein an opening diameter is different between the deep recess dedicated opening and the shallow recess dedicated opening. A product provided with a rotating drum having an accumulation concave portion on which the raw material is piled on the outer peripheral surface, a release air blow means disposed inside the rotating drum, and a suction means connected to the inside of the rotating drum. Using a fiber device,
On the outer surface of the accumulation recess formed by the porous member having a plurality of suction holes, the raw material transported on the air flow generated by suction by the suction means from the inside while rotating the rotary drum A fiber-sending process to obtain a fiber product
And a transfer step of releasing the piled product from the stacking recess by blowing air from the release air blowing means toward the piled product at a predetermined transfer position. Because
A space portion defined by the porous member and a drum side wall forming a side surface of the rotating drum is formed on the inner surface side of the porous member, and the space portion is provided for suction provided on the drum side wall. It can communicate with the outside through the opening,
On the opposite side of the space portion from the porous member, there is provided a transfer opening through which air from the release air blowing means can pass,
A non-rotating suction chamber for controlling suction by the suction opening is disposed at an end of the rotating drum in the rotation axis direction so as to cover the suction opening, and the suction chamber is connected to the suction opening. A suction area that communicates with the suction means, and a non-suction area that closes the suction opening, along the circumferential direction of the rotary drum,
In a region corresponding to the suction region inside the rotating drum, a non-rotating suction suppression plate that closes the transfer opening is disposed along the circumferential direction of the rotating drum,
In the fiber stacking step, the suction opening and the suction means are communicated by the suction region, the transfer opening is closed by the suction suppression plate, and an air flow generated by suction by the suction means is generated. , Through the porous member from the outside of the device and into the device,
In the transfer step, the suction opening is closed by the non-suction region, and the transfer opening is blocked by the suction suppression plate, and the release air blow means is released from the mold release air blow unit at a predetermined transfer position. A method for manufacturing an absorbent body, wherein air is blown against the concave portion for accumulation through an opening for transfer.

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