JP5715005B2 - Absorbent article sheet member manufacturing apparatus - Google Patents

Description

  The present invention relates to a sheet member manufacturing apparatus for absorbent articles.

  Conventionally, in absorbent articles such as light incontinence absorbent pads that are used inside disposable diapers, they are fixed by sandwiching highly absorbent resin particles between two non-woven sheet members. Absorbent sheets are used.

  Patent document 1 is related with the manufacturing apparatus etc. of the sheet-like water absorbing body used for a disposable absorbent article. In the manufacturing apparatus, a temporary receiving roll in which a plurality of concave grooves arranged intermittently in the circumferential direction are formed on the outer surface, a delivery roll that holds and conveys a substrate sheet below the temporary receiving roll, and a temporary receiving roll A box that is disposed above and supplies superabsorbent resin particles to the plurality of grooves, and a plurality of grooves facing the outer surface of the temporary receiving roll between the box and the delivery roll. An arcuate guide member for holding the supplied superabsorbent resin particles is provided. The highly water-absorbent resin particles held in the plurality of concave grooves of the temporary receiving roll move downward by the rotation of the temporary receiving roll and are supplied onto the base sheet coated with the hot melt adhesive. And a sheet-like water absorption body is formed when a covering sheet is joined to a substrate sheet on both sides of super absorbent polymer particles on a substrate sheet.

JP 2005-59579 A

  By the way, since the superabsorbent resin particles absorb water vapor in the air and increase in viscosity, in the apparatus of Patent Document 1, some of the superabsorbent resin particles held in the concave grooves of the temporary receiving roll are concave. There exists a possibility that it may adhere to a groove | channel inner surface and it may not be supplied on a base material sheet.

  This invention is made | formed in view of the said subject, and aims at supplying particle | grains reliably from a recessed part on a sheet | seat in the sheet | seat member manufacturing apparatus for absorbent articles.

  The invention according to claim 1 is an apparatus for manufacturing a sheet member for absorbent articles, having a plurality of supply recesses arranged in the circumferential direction on the outer surface of the cylinder, and rotating about a cylinder rotation axis facing the horizontal direction. And a supply cylinder for sequentially supplying particles of absorbent material or deodorant material from the plurality of supply recesses onto the first sheet member by bringing the lower part of the cylinder outer surface into contact with the first sheet member which is a continuous sheet. A particle filling unit that sequentially fills the plurality of supply recesses with particles, and a second sheet member that is a continuous sheet on the particles supplied onto the first sheet member by the supply cylinder. A sheet joining portion for joining the member and the second sheet member, the supply cylinder is substantially cylindrical with the cylinder rotation axis as a center, and the outer surface is the cylinder outer surface, A supply cylinder member provided with a plurality of supply through holes arranged in a direction, and a tip that is inserted into each of the plurality of supply through holes and faces radially outward is located radially inward of the cylinder outer surface. Accordingly, a plurality of supply pins serving as the bottoms of the plurality of supply recesses, and a supply pin that pushes particles toward the first sheet member by moving the supply pins radially outward at the lower portion of the outer surface of the cylinder. A moving mechanism, wherein the sheet joining portion circumscribes the supply cylinder member with the first sheet member interposed therebetween, and rotates about a roller rotation axis parallel to the cylinder rotation axis, and the first sheet member And a second roller for supplying the second sheet member onto the first sheet member on the roller outer surface. Comprising a chromatography preparative supply unit, by the rollers on, or a joint that joins the second sheet member and the first sheet member at a position away from said roller.

  Invention of Claim 2 is a sheet | seat member manufacturing apparatus for absorbent articles of Claim 1, Comprising: The said roller has a some accommodating recessed part arranged in the circumferential direction on the said roller outer surface, Rotating the receiving recess and the supply recess facing each other, the supply pin moving mechanism moves the supply pin radially outward at a facing position where the supply recess and the receiving recess face each other, thereby causing particles to move to the first sheet member. At the same time, it is pushed into the housing recess.

  Invention of Claim 3 is a sheet | seat member manufacturing apparatus for absorbent articles of Claim 2, Comprising: The said roller is a substantially cylindrical shape centering on the said roller rotating shaft, and an outer surface is the said roller. A housing cylinder member provided with a plurality of housing through holes arranged in the circumferential direction on the outer surface, a plurality of housing pins inserted into the plurality of housing through holes, and a radial direction of the housing pin at the facing position An accommodation pin moving mechanism having the tip as the bottom of the accommodation recess by moving the tip facing outward from the roller outer surface inward in the radial direction;

  Invention of Claim 4 is a sheet | seat member manufacturing apparatus for absorbent articles of Claim 1, Comprising: The said roller has several suction opening arranged in the circumferential direction on the said roller outer surface, The sheet bonding portion further includes a suction portion that adsorbs particles from the inside of the roller via the suction port and the first sheet member, while rotating while the suction port and the supply recess are opposed to each other.

  Invention of Claim 5 is a sheet | seat member manufacturing apparatus for absorbent articles of Claim 4, Comprising: The said roller has a some accommodating recessed part by which these suction ports are provided in each inside , While rotating the accommodation recess and the supply recess, the supply pin moving mechanism moves the supply pin radially outward at a facing position where the supply recess and the accommodation recess face each other, and the particles are moved to the first sheet. It pushes into the said accommodation recessed part with a member.

  Invention of Claim 6 is a sheet | seat member manufacturing apparatus for absorbent articles in any one of Claim 1 thru | or 5, Comprising: The said supply pin moving mechanism is the some attached to each of these supply pins. A cam follower, and a cam in contact with the plurality of cam followers inside the supply cylinder member.

  Invention of Claim 7 is a sheet | seat member manufacturing apparatus for absorbent articles in any one of Claim 1 thru | or 6, Comprising: The said particle filling part accommodates particle | grains above the said supply cylinder, A cover portion that sequentially fills the plurality of supply recesses with particles at a particle filling port facing the cylinder outer surface, and extends in the rotation direction of the supply cylinder from the particle filling port to cover a part of the cylinder outer surface. This closes the outside of the supply recess filled with particles.

  In this invention, particle | grains can be reliably supplied on a 1st sheet | seat member from a supply recessed part.

It is a figure which shows the absorption sheet manufacturing apparatus which concerns on 1st Embodiment. It is sectional drawing of the supply cylinder vicinity. It is a front view of a supply cylinder. It is sectional drawing of a 2nd roller. It is a front view of the 2nd roller. It is sectional drawing of a 4th roller. It is sectional drawing of a 2nd auxiliary joining roller. It is a front view of the 2nd auxiliary joining roller. It is a figure which shows the supply cylinder vicinity. It is a top view of an absorption sheet. It is a front view of the 2nd roller. It is a figure which shows the absorbent sheet manufacturing apparatus which concerns on 2nd Embodiment. It is sectional drawing of a 2nd roller. It is a figure which shows the supply cylinder vicinity.

  FIG. 1 is a diagram showing an absorbent sheet manufacturing apparatus 1 according to the first embodiment of the present invention. Absorbent sheet manufacturing apparatus 1 is one of absorbent article sheet member manufacturing apparatuses, and a sheet of non-woven fabric or the like made of superabsorbent polymer particles such as super absorbent polymer (SAP) as an absorbent material. An absorbent sheet is produced by sandwiching the members. The absorbent sheet is a sheet member for absorbent articles used for absorbent articles such as disposable diapers and light incontinence absorbent pads.

  The absorbent sheet manufacturing apparatus 1 includes a supply cylinder 21 centered on a cylinder rotation axis R <b> 0 facing in the horizontal direction, a first roller 31 disposed obliquely lower left of the supply cylinder 21, and a first roller disposed obliquely lower right of the supply cylinder 21. A second roller 41, a third roller 51 disposed on the right side of the second roller 41, and a sheet conveying roller 71 disposed above the second roller 41 and in proximity to the second roller 41 and the supply cylinder 21. . In FIG. 1, in order to facilitate understanding of the drawing, the cross section of the supply cylinder 21 and each roller is shown without a parallel oblique line (the same applies to other drawings).

  The first roller 31 has a substantially cylindrical shape centered on a first rotation axis R1 that is parallel to a direction in which the cylinder rotation axis R0 faces (hereinafter referred to as “axial direction”), and the second roller 41 is in the axial direction. It is a substantially cylindrical shape centering on the parallel second rotation axis R2. The first roller 31 and the second roller 41 are disposed substantially symmetrically with respect to a plane including the cylinder rotation axis R0 of the supply cylinder 21 and parallel to the vertical direction. The third roller 51 and the sheet conveying roller 71 have a substantially cylindrical shape centered on a third rotating shaft R3 and a conveying roller rotating shaft R5 that are parallel to the axial direction, respectively.

  The absorbent sheet manufacturing apparatus 1 further includes an auxiliary joint portion 62 disposed below the third roller 51. The auxiliary joining portion 62 has a substantially cylindrical first auxiliary joining roller 63 centered on an auxiliary roller rotation axis R6 parallel to the axial direction, and a substantially cylindrical shape centered on an auxiliary roller rotation axis R7 parallel to the axial direction. The second auxiliary joining roller 64 is provided. The absorbent sheet manufacturing apparatus 1 also includes a plurality of substantially cylindrical auxiliary rollers 32 and 42 centering on a central axis parallel to the axial direction, and an application unit 72 disposed above the auxiliary roller 42.

  The supply cylinder 21, the third roller 51, the sheet conveying roller 71, and the first auxiliary joining roller 63 are respectively shown in FIG. 1 around the cylinder rotation axis R0, the third rotation axis R3, the conveyance roller rotation axis R5, and the auxiliary roller rotation axis R6. The first roller 31, the second roller 41, and the second auxiliary joining roller 64 rotate in the counterclockwise direction in FIG. 1, respectively, with the first rotation axis R1, the second rotation axis R2, and the auxiliary roller rotation axis R7 as the center. Rotate clockwise inside.

  In the absorbent sheet manufacturing apparatus 1, the first sheet member 91 that is a continuous sheet formed of a nonwoven fabric or the like is conveyed to the first roller 31 via the auxiliary roller 32, and the first roller outer surface of the first roller 31. 311 is moved to the cylinder outer surface 211 of the supply cylinder 21. Subsequently, particles of superabsorbent resin (hereinafter simply referred to as “particles”) are sequentially supplied onto the first sheet member 91 by the supply cylinder 21. The first sheet member 91 is further moved from the cylinder outer surface 211 of the supply cylinder 21 to the second roller outer surface 411 of the second roller 41.

  On the other hand, the second sheet member 92 that is a continuous sheet formed of a nonwoven fabric or the like is guided to the sheet conveying roller 71 via the auxiliary roller 42. An adhesive (in the present embodiment, a hot melt adhesive) is applied to one main surface of the second sheet member 92 over the entire surface by the application unit 72. The second sheet member 92 is guided from the sheet conveying roller 71 to the second roller 41, and in the vicinity of a position where the second roller 41 circumscribes a supply cylinder member 215 (described later) of the supply cylinder 21 via the first sheet member 91. Then, the toner is supplied onto the first sheet member 91 on the second roller outer surface 411. That is, the sheet conveyance roller 71 is a second sheet supply unit that supplies the second sheet member 92.

  The first sheet member 91 and the second sheet member 92 are overlapped between the second roller 41 and the third roller 51 and between the first auxiliary joining roller 63 and the second auxiliary joining roller 64. pass. Thereby, the 1st sheet member 91 and the 2nd sheet member 92 are joined, and an absorption sheet is formed. In the following description, the first sheet member 91 and the second roller 41, the third roller 51, the sheet conveying roller 71, the first auxiliary joining roller 63 and the second auxiliary joining roller 64, which are the auxiliary joining portions 62, and the like. The configuration related to the joining with the two sheet members 92 is collectively referred to as a sheet joining portion 40.

  A particle filling unit 23 is provided above the supply cylinder 21. The particle filling unit 23 includes a particle tank 231 that stores particles above the supply cylinder 21 and a level sensor 233 provided in the particle tank 231. When the level sensor 233 detects that the amount of particles in the particle tank 231 has become a certain amount or less, the particle tank 231 is replenished with particles. The particle tank 231 extends substantially parallel to the direction of gravity, and a particle filling port 232 facing the cylinder outer surface 211 of the supply cylinder 21 is provided at the lower end of the particle tank 231. The particle filling port 232 faces a part including the uppermost part of the supply cylinder 21.

  Around the supply cylinder 21, a first cover part 221 that covers a part of the cylinder outer surface 211 and a second cover part 222 that covers the other part of the cylinder outer surface 211 are provided. The first cover portion 221 extends from the particle filling port 232 to the front side in the rotation direction of the supply cylinder 21 (that is, counterclockwise in FIG. 1), and the portion where the supply cylinder 21 and the first roller 31 are closest to each other. The cylinder outer surface 211 is covered on the left side of the supply cylinder 21. The second cover portion 222 extends from the particle filling port 232 to the rear side in the rotation direction of the supply cylinder 21 (that is, clockwise in FIG. 1) and is provided to the vicinity of the right end portion of the supply cylinder 21. The cylinder outer surface 211 is covered on the right side.

  FIG. 2 is an enlarged sectional view showing the vicinity of the supply cylinder 21. FIG. 2 shows a cross section perpendicular to the cylinder rotation axis R0. FIG. 3 is a diagram showing the cylinder outer surface 211 of the supply cylinder 21 and shows a state in which the cylinder outer surface 211 is viewed along a direction perpendicular to the cylinder rotation axis R0. In FIG. 2, the particles are marked with dense parallel diagonal lines. In FIG. 3, the first cover part 221 and the second cover part 222 are not shown.

  As shown in FIG. 2, the supply cylinder 21 includes a substantially cylindrical supply cylinder member 215 centered on the cylinder rotation axis R0, a plurality of supply pins 216 disposed inside the supply cylinder member 215, and a plurality of supplies. A supply pin moving mechanism 217 that moves the pin 216 back and forth in the radial direction is provided. The outer surface of the supply cylinder member 215 is the cylinder outer surface 211 described above.

  The supply cylinder member 215 has a plurality of supply through holes 212a penetrating the side walls. The plurality of supply through holes 212a are arranged at equal intervals in the circumferential direction around the cylinder rotation axis R0 at each of a plurality of positions in the axial direction. When a plurality of supply through holes 212a arranged in the circumferential direction at the same position in the axial direction are called supply through hole rows 213, the supply cylinder member 215 is provided with three supply through hole rows 213 as shown in FIG. It is done. In the present embodiment, the shape of the cross section perpendicular to the longitudinal direction of each supply through hole 212a is substantially circular, but the cross section of the supply through hole 212a may be various shapes (for example, substantially rectangular). The supply cylinder member 215 may be provided with one, two, or four or more supply through-hole rows 213. In each supply through-hole row 213, the plurality of supply through-holes 212a are not necessarily arranged at equal intervals. As shown in FIG. 1, the cylinder outer surface 211 is very close to the inner surface of the first cover portion 221 and the inner surface of the second cover portion 222 in a region where the supply through hole 212 a does not exist, and substantially Is in contact with

  The cross section perpendicular to the longitudinal direction of each supply pin 216 shown in FIG. 2 is substantially circular, and the diameter of the cross section is slightly smaller than the diameter of the supply through hole 212a. The plurality of supply pins 216 are respectively inserted into the plurality of supply through holes 212a so as to be able to advance and retract. At each position excluding the lower part of the supply cylinder 21, the supply pin 216 has a distal end that faces the radially outer side located radially inward of the cylinder outer surface 211, thereby forming a plurality of supply recesses 212 on the cylinder outer surface 211. The In each supply recess 212, the tip of the supply pin 216 becomes the bottom of the supply recess 212. Further, the three supply through-hole rows 213 of the supply cylinder member 215 form three supply recess rows in the supply cylinder 21. Hereinafter, the supply through hole row 213 is referred to as a supply recess row 213.

  The supply pin moving mechanism 217 includes a plurality of cam followers 2171 attached to the radially inner ends of the plurality of supply pins 216, and a substantially circular cam 2172 disposed inside the supply cylinder member 215. The cam 2172 is fixed so as not to rotate, and the plurality of cam followers 2171 circumscribe the cam 2172. The distance from the cylinder rotation axis R0 to the outer edge of the cam 2172 at the lower part of the supply cylinder 21 is larger than the distance from the cylinder rotation axis R0 to the outer edge of the cam 2172 at other positions.

  Specifically, the distance from the cylinder rotation axis R0 to the outer edge of the cam 2172 is the position where the second roller 41 shown in FIG. 1 circumscribes the cylinder outer surface 211 of the supply cylinder member 215 via the first sheet member 91 (see FIG. 1 is the largest in the diagonally lower right of the cylinder rotation axis R0. Further, in the region of approximately 90 ° in the circumferential direction centering on the position, the distance from the cylinder rotation axis R0 to the outer edge of the cam 2172 gradually decreases as the distance from the position in the circumferential direction increases. The distance is constant. In the supply cylinder 21, the supply pin 216 moves together with the supply cylinder member 215 and moves radially outward as it approaches the second roller 41.

  In the absorbent sheet manufacturing apparatus 1, the supply cylinder member 215 and the plurality of supply pins 216 of the supply cylinder 21 shown in FIG. 2 rotate at high speed around the cylinder rotation axis R 0 and pass through the particle filling port 232. On the other hand, particles are sequentially filled from the particle tank 231 of the particle filling unit 23 by gravity. A communication portion 26 disposed adjacent to the particle filling port 232 is provided on the right side of the particle filling port 232 in FIG. The communication portion 26 is provided over substantially the entire width of the range in which the three supply recess rows 213 (see FIG. 3) are arranged in the axial direction of the supply cylinder 21.

  The communication portion 26 is a supply that faces the particle filling port 232 at the rear edge of the particle filling port 232 (that is, the rear edge in the rotation direction of the supply cylinder 21) among the plurality of supply recesses 212 of the supply cylinder 21. The recess 212b (denoted by reference numeral 212b for distinguishing from the other supply recess 212) and the external space are communicated. As a result, when the particles are filled from the particle filling portion 23 into the supply recess 212b, the air in the supply recess 212b is pushed out by the particles flowing into the supply recess 212b, and enters the external space via the communication portion 26. Easily discharged. As a result, the density of the particles filled in the supply recess 212b can be increased.

  The first end portion 261 that is one end portion of the communication portion 26 that faces the supply cylinder 21 is located below the second end portion 262 that is the other end portion located on the outer space side. In the communication part 26, the communication path 260 is bent at at least two places. In the present embodiment, the communication path 260 is bent at three locations only in the vertical direction, and the first end 261 of the communication portion 26 is positioned approximately vertically below the second end 262. Thereby, it is suppressed that the particle | grains with which the supply recessed part 212b was filled will pass through the communication part 26, and will be discharge | released to external space.

  A communication portion suction portion 264 that sucks the gas in the communication portion 26 is connected to the second end portion 262 of the communication portion 26 via a pipe 263. The communicating portion suction portion 264 includes a regulator that adjusts the suction pressure, and performs weak suction. Thereby, since the air in the supply recessed part 212b is discharged | emitted more efficiently, the density of the particle | grains with which the supply recessed part 212b is filled can further be increased.

  FIG. 4 is a cross-sectional view of the second roller 41, showing a cross section perpendicular to the second rotation axis R2. FIG. 5 is a diagram illustrating the second roller outer surface 411 of the second roller 41, and shows a state in which the second roller outer surface 411 is viewed along a direction perpendicular to the second rotation axis R2. As shown in FIGS. 4 and 5, on the second roller outer surface 411, a plurality of receiving recesses 412 are arranged in the circumferential direction around the second rotation axis R <b> 2 at each of a plurality of positions in the axial direction. Arranged at a distance. When a plurality of receiving recesses 412 arranged in the circumferential direction at the same axial position is referred to as a receiving recess row 413, the second roller 41 is provided with three receiving recess rows 413 as shown in FIG. In the present embodiment, the shape of each receiving recess 412 viewed from the direction perpendicular to the second rotation axis R2 is substantially circular, and the shape of the bottom surface of each receiving recess 412 in the cross section perpendicular to the second rotation axis R2 is As shown in FIG. 4, it is substantially arc-shaped.

  FIG. 6 is a cross-sectional view of the third roller 51, showing a cross section perpendicular to the third rotation axis R3. The third roller outer surface 511 of the third roller 51 is a smooth cylindrical surface that rotates about the third rotation axis R3. The third roller 51 includes therein a heater 514 that is an outer surface heating unit that heats the third roller outer surface 511. The first auxiliary joining roller 63 of the auxiliary joining portion 62 shown in FIG. 1 has the same structure as the third roller 51 and includes a heater 634 inside.

  FIG. 7 is a cross-sectional view of the second auxiliary joining roller 64 of the auxiliary joining portion 62, showing a cross section perpendicular to the auxiliary roller rotation axis R7. FIG. 8 is a diagram showing the outer surface 641 of the second auxiliary joining roller 64, and shows a state in which the outer surface 641 is viewed along a direction perpendicular to the auxiliary roller rotation axis R7. The structure of the second auxiliary joining roller 64 is substantially the same as that of the second roller 41. As shown in FIGS. 7 and 8, a plurality of auxiliary members are provided on the outer surface 641 at a plurality of positions in the axial direction. The recesses 642 are arranged apart from each other in the circumferential direction around the auxiliary roller rotation axis R7. If a plurality of auxiliary recesses 642 arranged in the circumferential direction at the same axial position are referred to as an auxiliary recess row 643, the second auxiliary joining roller 64 is provided with three auxiliary recess rows 643 as shown in FIG. The outer surface of the conveyance roller 71 of the sheet conveyance roller 71 shown in FIG. 1 is a smooth cylindrical surface.

  In the absorbent sheet manufacturing apparatus 1, a plurality of supply recess rows 213 (see FIG. 3) in the supply cylinder 21, a plurality of storage recess rows 413 (see FIG. 5) in the second roller 41, and a plurality in the second auxiliary joining roller 64. The auxiliary recess rows 643 (see FIG. 8) are arranged at the same position in the axial direction. Further, the diameters of the second roller 41 and the second auxiliary joining roller 64 are equal, and the interval in the circumferential direction of the accommodating recess 412 and the interval in the circumferential direction of the auxiliary recess 642 are also equal. The diameter of the supply cylinder 21 is twice that of the second roller 41 and the second auxiliary joining roller 64, and the number of supply recesses 212 included in one supply recess row 213 is also included in one storage recess row 413. This is twice the number of the recesses 412 and the number of the auxiliary recesses 642 included in one auxiliary recess row 643. In the present embodiment, the diameter and capacity of the accommodation recess 412 and the auxiliary recess 642 are equal to or larger than the diameter and capacity of the supply recess 212.

  When the absorbent sheet is manufactured by the absorbent sheet manufacturing apparatus 1, the first sheet member 91 is moved on the first roller outer surface 311 by the rotation of the first roller 31 and the supply cylinder 21, as shown in FIG. It is conveyed and moved from the first roller outer surface 311 to the cylinder outer surface 211. In FIG. 9, the first sheet member 91 and the second sheet member 92 are drawn away from the first roller 31, the second roller 41, the supply cylinder 21, and the like for easy understanding of the drawing (FIG. 9). 14).

  In the supply cylinder 21, the plurality of supply recesses 212 arranged in the circumferential direction on the cylinder outer surface 211 are sequentially filled with particles from the particle filling unit 23 as described above. The supply recess 212 filled with the particles is closed to the lower end of the first cover portion 221 with its outer side closed by the first cover portion 221 (that is, covered from the cylinder outer surface 211 side). It reaches. The lower end of the first cover portion 221 substantially coincides with the position where the first roller 31 circumscribes the supply cylinder member 215 of the supply cylinder 21 via the first sheet member 91.

  In the absorbent sheet manufacturing apparatus 1, particles are sequentially supplied from the plurality of supply recesses 212 onto the first sheet member 91 in a state where the lower portion of the cylinder outer surface 211 and the first sheet member 91 are in contact with each other. In the lower part of the cylinder outer surface 211, the supply pin moving mechanism 217 supplies the supply in the supply recess 212 as the supply recess 212 approaches the position where the supply cylinder member 215 and the second roller 41 are in contact with each other via the first sheet member 91. The pin 216 is moved radially outward. The tip of the supply pin 216 is moved to a position approximately equal to the cylinder outer surface 211, whereby the particles in the supply recess 212 are pushed out from the supply recess 212 toward the first sheet member 91 by the supply pin 216.

  The first sheet member 91 moves toward a position where the supply cylinder member 215 and the second roller 41 are in contact with each other by the rotation of the supply cylinder 21 and the second roller 41. The second roller 41 includes a supply recess 212 (more precisely, a supply pin 216 protruding from the supply recess 212 as will be described later) and an accommodation recess 412 at a position where the supply cylinder member 215 and the second roller 41 are in contact with each other. It rotates while facing each other. In the following description, this position is referred to as a “concave facing position”.

  At the recess facing position, the supply pin 216 is further moved radially outward, the tip of the supply pin 216 protrudes radially outward from the cylinder outer surface 211, and is supplied from the supply recess 212 onto the first sheet member 91. The particles are pushed together with the first sheet member 91 into the opposing housing recess 412. In other words, the first sheet member 91 is pressed toward the accommodation recess 412 of the second roller 41 by the supply pin 216, whereby a sheet recess 912 in which particles are accommodated is formed in the first sheet member 91. The sheet recess 912 is accommodated in the accommodation recess 412. The second roller 41 is a storage roller in which the sheet recess 912 holding the particles is accommodated in the second roller outer surface 411, and the second roller outer surface 411 and the second rotation shaft R2 rotate the accommodation roller outer surface and the accommodation roller. Is the axis.

  The supply pin 216 moves radially inward as it moves away from the recess facing position, and the tip of the supply pin 216 is located radially inward of the cylinder outer surface 211. Each supply recess 212 moves away from the recess facing position to the upper portion of the supply cylinder 21, passes below the second cover portion 222, and travels toward the particle filling port 232 of the particle filling portion 23.

  On the other hand, the second sheet member 92 to which the adhesive is applied is guided to the second roller 41 via the sheet conveying roller 71, and particles are placed in the plurality of sheet recesses 912 on the second roller outer surface 411. It superimposes on the 1st sheet | seat member 91 to hold | maintain (namely, the opening side of the some sheet | seat recessed part 912). Then, the first sheet member 91 and the second sheet member 92 are overlapped and sandwiched between the second roller 41 and the third roller 51 in which the third roller outer surface 511 is heated by the heater 514. The first sheet member 91 and the second sheet member 92 are joined. That is, the third roller 51 is a joining portion that joins the first sheet member 91 and the second sheet member 92 on the second roller 41.

  The joined first sheet member 91 and second sheet member 92 are guided to the auxiliary joining portion 62 shown in FIG. 1 and sandwiched between the first auxiliary joining roller 63 and the second auxiliary joining roller 64. At this time, the plurality of sheet recesses 912 (see FIG. 9) are accommodated in the plurality of auxiliary recesses 642 (see FIGS. 7 and 8) of the second auxiliary joining roller 64. Thereby, the deformation | transformation of the sheet | seat recessed part 912 is prevented. In the auxiliary joining portion 62, the outer surface of the first auxiliary joining roller 63 is heated by the heater 634, and the first sheet member 91 and the second sheet member 92 are the first auxiliary joining roller 63 and the second auxiliary joining roller. By being sandwiched between the two, it is possible to further strongly bond. Thereby, as shown in FIG. 10, the absorption sheet 95 which has the some particle presence area | region 951 arrange | positioned at dot shape is formed. In each particle existence region 951, particles of the superabsorbent resin are distributed, and the first sheet member 91 and the second sheet member 92 are joined around the plurality of particle existence regions 951.

  As described above, in the absorbent sheet manufacturing apparatus 1, the supply cylinder 21 includes the supply cylinder member 215, the plurality of supply pins 216, and the supply pin moving mechanism 217, and the supply pin 216 is provided in the supply through hole 212 a of the supply cylinder member 215. Is inserted to form a supply recess 212 filled with particles from the particle filling portion 23. Then, in the lower part of the cylinder outer surface 211, the supply pin 216 is moved radially outward in a state where the first sheet member 91 is in contact with the cylinder outer surface 211, so that the particles in the supply recess 212 are moved to the first sheet member 91. It is pushed out toward. Thereby, it is possible to suppress or prevent the particles from adhering to and remaining on the inner surface of the supply recess 212, and to reliably supply the particles from the supply recess 212 onto the first sheet member 91.

  In the absorbent sheet manufacturing apparatus 1, the supply pin 216 is moved radially outward at the recessed portion facing position, and the particles are pushed into the housing recessed portion 412 of the second roller 41 together with the first sheet member 91, whereby the first sheet member 91. Thus, the sheet recess 912 can be easily formed. In addition, by holding the particles in the sheet recess 912, it is possible to prevent the particles from diffusing around the sheet recess 912 on the first sheet member 91. As a result, it is possible to easily form the absorbent sheet 95 having a plurality of particle existence regions 951 arranged in a dot shape.

  In the supply cylinder 21, by using the cam 2172 and the plurality of cam followers 2171, the supply pin moving mechanism 217 that moves the plurality of supply pins 216 back and forth in the radial direction can be easily realized. Moreover, the capacity | capacitance of the supply recessed part 212 can be easily changed by replacing | exchanging the cam 2172 for the other cam from which a shape differs, and replacing | exchanging the supply pin 216 for another supply pin from which length differs. Furthermore, by providing the particle filling portion 23 above the supply cylinder 21 and sequentially filling the plurality of supply recesses 212 by gravity, the supply recesses 212 can be easily filled with particles.

  FIG. 11 is a diagram showing an outer surface of another preferable second roller. A plurality of suction ports 414 are provided on the second roller outer surface 411 of the second roller 41a shown in FIG. 11, and suction portions 418 that are part of the sheet joining portion 40 are disposed on both the left and right sides of the second roller 41a. Is done. The shape of each suction port 414 viewed from the direction perpendicular to the second rotation axis R <b> 2 is substantially circular, and the suction port 414 is sufficiently smaller than the housing recess 412. The plurality of suction ports 414 are provided over the entire circumference of the second roller outer surface 411 in the circumferential direction around the second rotation axis R2. In FIG. 11, only the suction port 414 above the second rotation axis R2 is illustrated by a thin line for easy understanding of the drawing.

  The plurality of suction ports 414 are provided to both sides of the three housing recess rows 413 in the axial direction. In other words, the plurality of suction ports 414 are provided so as to overlap the whole of the plurality of receiving recess rows 413, and of course, are also provided inside each receiving recess 412. When the plurality of suction ports 414 provided in one housing recess 412 are referred to as a suction port group 414a, the second roller 41a has a plurality of suction port groups 414a arranged in the circumferential direction on the second roller outer surface 411. Then, the suction port group 414a and the supply recess 212 are rotated while facing each other at the recess facing position.

  In the sheet joining portion 40, air is sucked by the suction portion 418 from the inside of the second roller 41a through the suction port 414. As a result, the first sheet member 91 is attracted to the second roller outer surface 411. As a result, it is possible to suppress or prevent the first sheet member 91 from being displaced due to pressing by the supply pin 216, and the sheet recess 912 can be easily formed. Further, by sucking the sheet recess 912 along the inner surface of the housing recess 412, the capacity of the sheet recess 912 can be easily increased, and the particles can be easily held in the sheet recess 912. Further, the particles are adsorbed through the suction port 414 and the first sheet member 91 in the housing recess 412, thereby preventing or preventing the particles from jumping out of the sheet recess 912.

  Next, an absorbent sheet manufacturing apparatus according to the second embodiment of the present invention will be described. FIG. 12 is a diagram showing an absorbent sheet manufacturing apparatus 1a according to the second embodiment. In the absorbent sheet manufacturing apparatus 1 a, the first roller 31 in FIG. 1 is omitted, and a second roller 41 b having a structure different from that of the second roller 41 is disposed vertically below the supply cylinder 21. Other configurations are substantially the same as those of the absorbent sheet manufacturing apparatus 1 in FIG. 1, and the same reference numerals are given in the following description.

  As shown in FIG. 12, the second roller 41b, which is an accommodation roller, is arranged such that the second rotation axis R2 is positioned vertically below the cylinder rotation axis R0. The second roller 41 b circumscribes the lowermost part of the supply cylinder member 215 of the supply cylinder 21 via the first sheet member 91. The 1st cover part 221 is provided to the vicinity of the site | part to which the supply cylinder 21 and the 2nd roller 41b approach most. In the supply pin moving mechanism 217 of the supply cylinder 21, the distance from the cylinder rotation axis R0 to the outer edge of the cam 2172 at the lowermost part of the supply cylinder 21 is larger than the distance from the cylinder rotation axis R0 to the outer edge of the cam 2172 at other positions. large. Further, the distance from the cylinder rotation axis R0 to the outer edge of the cam 2172 at other positions is constant.

  FIG. 13 is an enlarged cross-sectional view of the second roller 41b, showing a cross section perpendicular to the second rotation axis R2. The second roller 41b includes a substantially cylindrical accommodation cylinder member 415 centered on the second rotation axis R2, a plurality of accommodation pins 416 disposed inside the accommodation cylinder member 415, and the plurality of accommodation pins 416 in the radial direction. An accommodation pin moving mechanism 417 is provided to advance and retract. The outer surface of the storage cylinder member 415 is the second roller outer surface 411 described above.

  The accommodating cylinder member 415 has a plurality of accommodating through holes 412a that penetrate the side walls. The plurality of accommodation through holes 412a are arranged at equal intervals in the circumferential direction around the second rotation axis R2 at each of a plurality of positions in the axial direction. When the plurality of accommodation through holes 412a arranged in the circumferential direction at the same position in the axial direction are referred to as accommodation through hole rows, the accommodation cylinder member 415 is provided with three supply through hole rows. The diameter of the accommodation cylinder member 415 is equal to the diameter of the supply cylinder member 215, and the number of accommodation through holes 412 a included in one accommodation through hole row is the number of supply recesses 212 included in one supply recess row 213 (see FIG. 3). ). In the present embodiment, the shape of the cross section perpendicular to the longitudinal direction of each accommodation through hole 412a is substantially circular, but the cross section of the accommodation through hole 412a may be various shapes (for example, substantially rectangular). The accommodation cylinder member 415 may be provided with one, two, or four or more accommodation through-hole rows. In each accommodation through-hole row, the plurality of accommodation through-holes 412a are not necessarily arranged at equal intervals.

  The cross section perpendicular to the longitudinal direction of each accommodation pin 416 is substantially circular, and the diameter of the cross section is slightly smaller than the diameter of the accommodation through hole 412a. Each of the plurality of receiving pins 416 is inserted into the plurality of receiving through holes 412a so as to advance and retreat.

  The accommodation pin moving mechanism 417 includes a plurality of cam followers 4171 attached to the radially inner ends of the plurality of accommodation pins 416, and a substantially circular cam 4172 disposed inside the accommodation cylinder member 415. The cam 4172 is fixed so as not to rotate, and the plurality of cam followers 4171 circumscribe the cam 4172. The distance from the second rotation axis R2 to the outer edge of the cam 4172 is the rotational direction of the second roller 41b from the top of the receiving cylinder member 415, which is the position where the second roller 41b and the supply cylinder member 215 are circumscribed (FIG. 13). In the region (hereinafter referred to as “accommodating region”) reaching the right end in FIG. 13 where the second roller 41b and the third roller 51 are circumscribed along (clockwise in the middle). Smaller than the area.

  In the second roller 41 b, an accommodation recess 412 is formed by the distal end of the accommodation pin 416 facing the radially outer side being located radially inward of the second roller outer surface 411 in the accommodation region, and the distal end of the accommodation pin 416 is formed. Is the bottom of the housing recess 412. Further, in a region other than the storage region, the tip of the storage pin 416 is located at a position approximately equal to the second roller outer surface 411.

  When the absorbent sheet is manufactured by the absorbent sheet manufacturing apparatus 1a, as shown in FIG. 14, the supply cylinder 21 is rotated to sequentially fill the plurality of supply recesses 212 with the particles from the particle filling unit 23. The second roller 41 b rotates while the storage recess 412 and the supply recess 212 are opposed to each other at a position where the supply cylinder member 215 and the storage cylinder member 415 are circumscribed via the first sheet member 91. In the following description, this position is referred to as a “concave facing position”.

  In the absorbent sheet manufacturing apparatus 1a, the first sheet member 91 is conveyed by the rotation of the supply cylinder 21 and the second roller 41b, and the supply pin 216 is moved in the radial direction at the recess facing position by the supply pin moving mechanism 217 and the accommodation pin moving mechanism 417. The housing pin 416 is moved radially inward while being moved outward. The tip of the supply pin 216 protrudes to the radially outer side from the cylinder outer surface 211. The distal end of the accommodation pin 416 is located on the radially inner side with respect to the second roller outer surface 411, and an accommodation recess 412 is formed. The particles in the supply recess 212 are pushed out toward the first sheet member 91 by the supply pin 216 and are pushed into the opposing storage recess 412 together with the first sheet member 91. As a result, a sheet recess 912 is formed in the first sheet member 91, and the sheet recess 912 is accommodated in the accommodation recess 412.

  The supply pin 216 moves radially inward as it moves away from the recess facing position, and the tip of the supply pin 216 is located radially inward of the cylinder outer surface 211. Further, the accommodation pin 416 is not moved in the radial direction, and the accommodation recess 412 in which the sheet recess 912 is accommodated moves to a position facing the third roller 51. The first sheet member 91 on the second roller 41b is overlaid with the second sheet member 92 coated with an adhesive, and is sandwiched between the second roller 41b and the third roller 51, whereby the first sheet is obtained. The member 91 and the second sheet member 92 are joined. Moreover, the 1st sheet member 91 and the 2nd sheet member 92 are joined still more firmly in the auxiliary junction part 62 (refer FIG. 12), and the absorption sheet 95 shown in FIG. 10 is formed.

  As described above, in the absorbent sheet manufacturing apparatus 1a, as in the first embodiment, the particles are supplied by pushing the particles in the supply recess 212 toward the first sheet member 91 by the supply pins 216. It can be suppressed or prevented from adhering to and remaining on the inner surface of the recess 212, and the particles can be reliably supplied onto the first sheet member 91 from the supply recess 212. Further, the sheet recess 912 can be easily formed in the first sheet member 91 by pushing the particles together with the first sheet member 91 into the housing recess 412 of the second roller 41b. Further, by holding the particles in the sheet recess 912, the absorbent sheet 95 having a plurality of particle existence regions 951 arranged in a dot shape can be easily formed.

  In the absorbent sheet manufacturing apparatus 1a, the second roller 41b is opposed to the lowermost part of the supply cylinder member 215, and the supply and supply of particles to the first sheet member 91 by the contact between the supply cylinder member 215 and the first sheet member 91 are performed. The extrusion of particles by the pins 216 and the formation of the sheet recesses 912 are performed almost simultaneously. Thereby, the 1st roller 31 is abbreviate | omitted and the absorbent sheet manufacturing apparatus 1a can be reduced in size.

  In the absorbent sheet manufacturing apparatus 1a, the second roller 41b has a structure including a storage cylinder member 415, a plurality of storage pins 416, and a storage pin moving mechanism 417, so that the protruding amount of the supply pin 216 at the concave facing position is changed. Even if it is a case, the depth of the accommodation recessed part 412 can be changed according to the said protrusion amount. Further, in the second roller 41b, by using the cam 4172 and the plurality of cam followers 4171, the housing pin moving mechanism 417 for moving the plurality of housing pins 416 in the radial direction can be easily realized. Furthermore, the capacity | capacitance of the accommodation recessed part 412 can be changed easily by replacing | exchanging the cam 4172 for the other cam from which a shape differs, and replacing | exchanging the accommodation pin 416 for the other accommodation pin from which length differs. For this reason, even when the capacity of the supply recess 212 is changed in the supply cylinder 21, the capacity of the supply recess 212 after the change, that is, the amount of particles in the sheet recess 912 accommodated in the accommodation recess 412 is changed. Further, the capacity of the housing recess 412 can be easily accommodated.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible.

  For example, in the sheet joining portion 40, the second rollers 41, 41a, and 41b may be provided with heaters that heat the second roller outer surface 411. Further, the second rollers 41, 41 a, 41 b may be provided with heaters, and the heaters 514 may be omitted from the third rollers 51. However, when suction is performed like the second roller 41a, it is preferable to provide a heater 514 on the third roller 51 in order to avoid heat loss due to suction.

  In the sheet joining portion 40, the first sheet member 91 and the second sheet member 92 may be superimposed and temporarily joined on the second rollers 41, 41a, 41b via a hot melt adhesive or the like. In this case, the joining of the first sheet member 91 and the second sheet member 92 is performed at a position away from the second rollers 41, 41a, 41b.

  In the second roller 41 a shown in FIG. 11, the suction port 414 may be provided only in the plurality of housing recesses 412. Further, in the second roller 41a, it is not always necessary to provide the plurality of receiving recesses 412 on the second roller outer surface 411, and only the plurality of suction ports 414 may be provided. Even in this case, the second roller 41a rotates while the suction port group 414a and the supply recess 212 are opposed to each other, and the suction unit 418 supplies the particles supplied in the form of dots onto the first sheet member 91. By adsorbing from the inside of the second roller 41a through the suction port 414 and the first sheet member 91, the arrangement of the particles on the first sheet member 91 can be maintained. As a result, it is possible to easily manufacture an absorbent sheet in which particles are arranged in a dot shape. In the absorbent sheet manufacturing apparatus, if it is possible to maintain the arrangement of the particles supplied in the form of dots on the first sheet member 91, the second roller outer surface 411 of the second roller has an accommodation recess 412 and The suction port 414 may not be provided.

  The supply pin moving mechanism 217 of the supply cylinder 21 does not necessarily have a structure having the cam 2172 and the plurality of cam followers 2171, and may have various other structures. The same applies to the accommodation pin moving mechanism 417 of the second roller 41b.

  In the above-described absorbent sheet production apparatus, a polyacrylic acid partial neutralized product cross-linked product, a starch-acrylic acid graft polymer hydrolyzate, a vinyl acetate-acrylic acid ester copolymer saponified product, an acrylonitrile copolymer or an acrylamide copolymer. Particles of an absorbent material such as a hydrolyzate of a combined product or a crosslinked product thereof, a crosslinked product of a cationic monomer, or a crosslinked product of polyamino acid are supplied.

  The structure of the absorbent sheet manufacturing apparatus is that the deodorant material particles such as activated carbon, silica, alumina, zeolite, ion exchange resin, molecular sieve are supplied onto the first sheet member 91, and the absorbent pad for disposable diapers and light incontinence. You may utilize for the sheet | seat member manufacturing apparatus for absorbent articles which manufactures the deodorizing sheet | seat which is a sheet | seat member for absorbent articles utilized for such absorbent articles.

  The configurations in the above embodiment and each modification may be combined as appropriate as long as they do not contradict each other.

DESCRIPTION OF SYMBOLS 1,1a Absorption sheet manufacturing apparatus 21 Supply cylinder 23 Particle filling part 40 Sheet joint part 41, 41a, 41b 2nd roller 51 3rd roller 71 Sheet conveyance roller 91 1st sheet member 92 2nd sheet member 211 Cylinder outer surface 212, 212b Supply concave portion 212a Supply through hole 215 Supply cylinder member 216 Supply pin 217 Supply pin moving mechanism 221 First cover portion 232 Particle filling port 411 Second roller outer surface 412 Storage recess 412a Storage through hole 414 Suction port 414a Suction port group 415 Cylinder member 416 Accommodation pin 417 Accommodation pin moving mechanism 418 Suction part 2171 Cam follower 2172 Cam R0 Cylinder rotation axis R2 Second rotation axis

Claims (7)

A sheet member manufacturing apparatus for absorbent articles,
A plurality of supply recesses arranged in the circumferential direction on the outer surface of the cylinder and rotating about a cylinder rotation axis facing in the horizontal direction to bring the lower part of the outer surface of the cylinder into contact with the first sheet member which is a continuous sheet A supply cylinder for sequentially supplying absorbent material or deodorant material particles from the plurality of supply recesses onto the first sheet member;
A particle filling section for sequentially filling the plurality of supply recesses with particles;
A sheet joining portion for joining the first sheet member and the second sheet member by superimposing the second sheet member, which is a continuous sheet, on the particles supplied onto the first sheet member by the supply cylinder;
With
The supply cylinder is
A supply cylinder member having a substantially cylindrical shape centering on the cylinder rotation axis, an outer surface being the cylinder outer surface, and a plurality of supply through holes arranged in a circumferential direction;
A plurality of supply pins that are inserted into the plurality of supply through holes and that serve as bottoms of the plurality of supply recesses by having their respective distal ends facing radially outward located radially inward of the cylinder outer surface;
A supply pin moving mechanism that pushes particles toward the first sheet member by moving the supply pin radially outward in the lower portion of the cylinder outer surface;
With
The sheet joint is
The first sheet member is interposed to circumscribe the supply cylinder member, rotate around a roller rotation axis parallel to the cylinder rotation axis, and move the first sheet member from the cylinder outer surface to the roller outer surface. Laura,
A second sheet supply unit for supplying the second sheet member onto the first sheet member on the outer surface of the roller;
A joining portion that joins the first sheet member and the second sheet member on the roller or at a position away from the roller;
The sheet | seat member manufacturing apparatus for absorbent articles characterized by the above-mentioned. It is a sheet | seat member manufacturing apparatus for absorbent articles of Claim 1, Comprising:
The roller has a plurality of receiving recesses arranged in the circumferential direction on the outer surface of the roller, and rotates while the receiving recess and the supply recess are opposed to each other.
The supply pin moving mechanism moves the supply pin radially outward at a position where the supply recess and the storage recess face each other, and pushes the particles into the storage recess together with the first sheet member. Absorbent article sheet member manufacturing apparatus. It is a sheet | seat member manufacturing apparatus for absorbent articles of Claim 2, Comprising:
The roller is
An accommodating cylinder member having a substantially cylindrical shape centered on the roller rotation axis, an outer surface being the roller outer surface, and a plurality of accommodating through holes arranged in a circumferential direction;
A plurality of accommodation pins inserted into the plurality of accommodation through holes;
An accommodation pin moving mechanism that moves the distal end of the accommodation pin facing radially outward from the roller outer surface to the radially inner side at the facing position, and using the tip as the bottom of the accommodation recess;
The sheet | seat member manufacturing apparatus for absorbent articles characterized by the above-mentioned. It is a sheet | seat member manufacturing apparatus for absorbent articles of Claim 1, Comprising:
The roller has a plurality of suction ports arranged in the circumferential direction on the outer surface of the roller, and rotates while facing the suction port and the supply recess,
The apparatus for manufacturing a sheet member for absorbent articles, wherein the sheet joining portion further includes a suction portion that adsorbs particles from the inside of the roller via the suction port and the first sheet member. It is a sheet | seat member manufacturing apparatus for absorbent articles of Claim 4, Comprising:
The roller has a plurality of receiving recesses provided with the plurality of suction ports in each of the rollers, and rotates while the receiving recess and the supply recess are opposed to each other.
The supply pin moving mechanism moves the supply pin radially outward at a position where the supply recess and the storage recess face each other, and pushes the particles into the storage recess together with the first sheet member. Absorbent article sheet member manufacturing apparatus. It is a sheet | seat member manufacturing apparatus for absorbent articles in any one of Claim 1 thru | or 5, Comprising:
The supply pin moving mechanism is
A plurality of cam followers respectively attached to the plurality of supply pins;
A cam in contact with the plurality of cam followers inside the supply cylinder member;
The sheet | seat member manufacturing apparatus for absorbent articles characterized by the above-mentioned. It is a sheet | seat member manufacturing apparatus for absorbent articles in any one of Claim 1 thru | or 6, Comprising:
The particle filling unit accommodates particles above the supply cylinder, and sequentially fills the plurality of supply recesses with particles at a particle filling port facing the outer surface of the cylinder,
For an absorbent article, the outside of the supply recess filled with particles is closed by a cover portion that extends from the particle filling port in the rotation direction of the supply cylinder and covers a part of the outer surface of the cylinder Sheet member manufacturing apparatus.

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