TW201522011A - Fused sheet manufacturing device and manufacturing method - Google Patents

Abstract

The fused sheet manufacturing device is equipped with: a support member (21), which has a first surface (21a) and a second surface (21b) and supports a sheet laminate (10) over the longitudinal direction thereof on the first surface (21a); and an irradiation head (30) disposed on the second surface (21b)-side of the support member (21). The support member (21) has slit-shaped openings (27) through which laser light (30) can pass. At positions on the first surface (21a)-side of the support member (21), air suction parts for sucking air from the slit-shaped openings (27) are disposed near said openings (27).

Description

Sheet fusion material manufacturing apparatus and manufacturing method

The present invention relates to a manufacturing apparatus and a manufacturing method of a sheet fusion body.

Previously, in the manufacturing steps of absorbent articles such as disposable diapers or menstrual sanitary napkins, the joining of the superposed sheets to each other has been a common heat roller device. Further, as another joining method, a method of welding using laser light is also known. For example, Patent Document 1 discloses a method in which a sheet laminated body in which a plurality of sheets are stacked is deformed into a shape of the peripheral surface of a rotating roll having a laser light transmitting portion along a circumferential surface, and is conveyed. The sheet laminate is irradiated with laser light from the inside of the rotating roller, and the sheets in the sheet laminate are fused to each other.

Prior technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open Publication No. 2010-188629

In the apparatus described in Patent Document 1, the sheet laminate to be fused is conveyed while being sandwiched between the rotating roller and the belt, and is fused by irradiation of laser light while being conveyed. At the time of fusion, there is a case where a gas containing resin fumes or the like is generated from the sheet laminate to be fused. The resin fumes are minute solid particles generated by the solidification of the vapor of the solid matter or the chemical reaction of the gaseous substance. Therefore, if the resin fumes are accumulated in the air at a high concentration, there is a fire. Moreover, since the generated smoke adheres to and accumulates on the rotating roller or the belt, the members are contaminated and the deposit is transferred to the product, and Produce defective products. Therefore, it is necessary to partially exhaust the gas containing the resin fumes. However, in the apparatus described in Patent Document 1, since the sheet laminated body is sandwiched between the rotating roller and the gas-impermeable belt, it is difficult to discharge the generated gas.

The present invention provides a manufacturing apparatus of a sheet fusing body having a sealing edge portion in which edges of a plurality of sheets are fused together.

The device includes a support member having a first surface and a second surface on a side opposite to the first surface, and a strip-shaped sheet laminate in which at least a part of the plurality of sheets including the resin material are stacked The first surface is supported in the longitudinal direction, and the illumination head is disposed on the second surface side of the support member and has a lens for collecting the laser light.

The support member has a slit-shaped opening portion through which the laser beam irradiated from the second surface side passes and which is long in the width direction of the sheet laminate.

An air suction portion for sucking air from the opening portion is disposed at a position on the first surface side of the support member so as to face the slit-shaped opening portion.

The sheet laminated body supported on the first surface of the support member is irradiated with laser light from the second surface side along the slit-shaped opening portion, and the sheet laminated body is cut in the width direction thereof, and At the same time, the cut edge portion is fused to form a sheet fusion body having the above-described sealing edge portion, and the gas generated by the cutting is sucked and removed by the air suction portion.

Moreover, the present invention provides a method of producing a sheet-fused body, which is a method for producing a sheet-fused body having a sealing edge portion in which edges of a plurality of sheets are fused together, and includes the following steps: A strip-shaped sheet laminate in which at least a part of a plurality of sheets including a resin material are superposed is supported in a support member having a first surface and a second surface on a side opposite to the first surface in a longitudinal direction thereof. First side; and The sheet laminated body that is disposed on the second surface side of the support member and has a lens that condenses the laser light is irradiated with the laser light toward the sheet laminated body supported on the first surface of the supporting member; The member is irradiated with the laser beam in the slit-shaped opening portion having a long width in the width direction of the sheet laminate, and the sheet laminate is cut in the width direction thereof, and at the same time, the sheet laminate is cut in the width direction. The cut edge portion is fused to form a sheet-fused body having the seal edge portion, and is sucked by the air suction portion disposed on the first surface side of the support member, and is removed by the cut. gas.

1‧‧‧Short-type disposable diapers

1A‧‧‧ ventral side

1B‧‧‧Back side

1C‧‧‧胯 lower part

2‧‧‧Absorbable ontology

2a‧‧‧Front sheet

2b‧‧‧Back sheet

2c‧‧‧ absorber

3‧‧‧Outer body

3a‧‧‧ side

4‧‧‧ Side seal

4a‧‧‧ outer edge

5‧‧‧Flexible components

6‧‧‧Flexible components

7‧‧‧Flexible components

8‧‧‧Low opening

9‧‧‧ Leg opening

10‧‧‧ diaper continuum

10a‧‧‧One side of diaper continuum

10b‧‧‧The other side of the diaper continuum

10C‧‧‧ cut off the scheduled part

11‧‧‧ Rolls

12‧‧‧protrusion roller

13‧‧‧Anvil Roll

20‧‧‧Laser joint device

21‧‧‧Support components

21a‧‧‧The first side of the supporting member

21b‧‧‧The second side of the supporting member

23‧‧‧Cylinder roller

24‧‧‧Support Department

25‧‧‧2nd cylindrical roller

26‧‧‧ Pressing head

27‧‧‧ openings

30‧‧‧Laser light

31‧‧‧ outer sheet

32‧‧‧ Inner sheet

35‧‧‧Eye head

40‧‧‧Fuse Department

41‧‧‧ Sealing edge

50A‧‧‧ Body Department

50B‧‧‧Pressure Department

51‧‧‧ body hollow

52a‧‧‧ front end

52b‧‧‧ back end

53‧‧‧Connecting components

54‧‧‧Local compression members

54a‧‧‧ screw holes

54A‧‧‧ Pressurized surface

55‧‧‧Air suction port

56‧‧‧Tension-giving components

56a‧‧‧ openings

56A‧‧‧Tension imparting the underside of the component

57‧‧‧Bolts

58‧‧‧ fixing plate

58a‧‧‧ openings

A1‧‧‧ edge

B1‧‧‧Edge

CL‧‧‧ imaginary centerline

D‧‧‧Transfer direction

F‧‧‧Predecessor

LO'‧‧‧ leg hole

R‧‧‧Back body

S‧‧‧ Space

T‧‧‧ thickness

Ta‧‧ thickness

Tb‧‧‧ thickness

P‧‧‧Inside and outside directions

X‧‧‧ portrait

X ₁ ‧‧‧ length direction

Y‧‧‧ horizontal

Y ₁ ‧‧‧width direction

Fig. 1 is a perspective view schematically showing a pants-type disposable diaper as an example of a sheet fusion body produced according to the present invention.

Fig. 2 is a cross-sectional view schematically showing a cross section taken along line I-I of Fig. 1.

Fig. 3 is a plan view schematically showing the unfolded and stretched state of the diaper shown in Fig. 1.

Fig. 4 is a perspective view schematically showing a manufacturing step of a diaper continuous body in the manufacture of the diaper shown in Fig. 1.

Fig. 5 is a perspective view schematically showing a manufacturing apparatus of a pants-type disposable diaper according to an embodiment of the apparatus for producing a sheet-fused body of the present invention.

Fig. 6 is a perspective view schematically showing a pressurizing head in the apparatus for manufacturing a pants-type disposable diaper shown in Fig. 5.

Fig. 7(a) is a cross-sectional view taken along line a-a in Fig. 6, and Fig. 7(b) is a cross-sectional view taken along line b-b in Fig. 6.

Fig. 8 is a perspective view of the pressurizing head shown in Fig. 6 as viewed from the lower surface side thereof.

Fig. 9 is a perspective view showing the main part of the pressurizing head shown in Fig. 6 in an exploded manner.

Fig. 10 is a cross-sectional view schematically showing a structure of a cross section of a rotating shaft passing through a supporting member in the manufacturing apparatus shown in Fig. 5.

Figure 11 is a view showing the rocking motion of the pressing member which is rotated around the peripheral surface of the supporting member. A pattern diagram of the state.

Fig. 12 (a) to (c) are schematic diagrams showing the state in which the pressurizing head in the shaking process state is in a pressurized state.

13(a) to 13(c) respectively cut a diaper continuous body (belt-shaped outer casing) by using the laser bonding apparatus shown in Fig. 5, and at the same time, form a side seal portion (sealing edge portion). An explanatory diagram for explaining the case.

Figure 14 is a cross-sectional view showing a side seal portion of the diaper shown in Figure 1 and its vicinity, showing a cross section orthogonal to the direction in which the side seal portion extends.

Hereinafter, the present invention will be described with reference to the drawings based on preferred embodiments thereof. In the following embodiments, the sheet fusing body which is the object to be manufactured in the present invention, that is, the sheet fusing body having the sealing edge portion in which the edge portions of the plurality of sheets are fused in an overlapping state, The present invention will be described by exemplifying a pants-type disposable diaper having a pair of side seal portions.

1 to 3 show a pants-type disposable diaper 1 manufactured in accordance with the present invention. The diaper 1 includes an absorbent body 2, and an outer casing 3 which forms an outer surface of the diaper 1, and the left and right side edges A1 and A1 of the outer casing 3 in the longitudinal direction X of the front body sheet F (ventral side portion 1A). A pair of side seal portions 4, 4, a waist opening portion 8, and a pair of legs are formed in engagement with the left and right side edge portions B1, B1 of the outer casing 3 in the longitudinal direction X in the back body piece R (back side portion 1B). Part opening portions 9, 9. The exterior body 3 is located on the non-skin contact surface side of the absorbent body 2, and the absorbent body 2 is fixed.

The diaper 1 has a longitudinal direction X corresponding to the front and rear directions of the wearer and a transverse direction Y orthogonal to the longitudinal direction X in a plan view of the unfolded and stretched state as shown in FIG. The diaper 1 can be divided into a lower portion 1C disposed on the crotch portion when worn, and a front side portion 1A and a back side portion 1B located before and after the longitudinal direction X thereof. In the crotch portion 1C, the outer casing 3 is formed with recessed portions for forming the leg openings 9, 9 in the left and right side edges along the longitudinal direction X thereof. Moreover, as shown in FIG. 3, the diaper 1 can be divided into the front by the imaginary center line CL which divides the diaper 1 in the longitudinal direction X into two parts. Body F and back body R.

Further, in the present specification, the skin contact surface is a face of the pants-type disposable diaper 1 or a member thereof (for example, an absorbent body) that faces the wearer's skin side when worn, and the non-skin contact surface is shorts. In the disposable disposable diaper 1 or the constituent members thereof, the side facing the side opposite to the skin side of the wearer (dressing side) when worn. In the diaper 1, the longitudinal direction X coincides with the direction (longitudinal direction) of the long side of the absorbent body 2 along the disposable diaper or the constituent member thereof, and the transverse direction Y and the absorbent body 2 along the disposable diaper or as a constituent member thereof The width direction is the same.

As shown in FIG. 3, the absorbent body 2 has a longitudinally long shape in one direction (longitudinal direction X), and includes: a front sheet 2a which forms a skin abutting surface; and a back sheet 2b which forms a non-skin The abutting surface; and the liquid retaining absorbent body 2c are interposed between the two sheets; the absorbent body 2c has a shape that is long in the same direction as the longitudinal direction X. The absorbent body 2 has its longitudinal direction aligned with the longitudinal direction X of the diaper 1 in the unfolded and stretched state, and is joined to the central portion of the exterior body 3 by a known joining means (adhesive or the like). Here, the unfolded and stretched state refers to a state in which the detached side seal portion is opened, and the diaper is unfolded to expand the elastic member of each portion to a design size (to completely eliminate the elasticity). The state until the state of the influence of the member is the same as when the planar shape is expanded.

As shown in FIGS. 2 and 3, the exterior body 3 is composed of an outer layer sheet 31 which forms the outer surface of the diaper 1 (the non-skin contact surface of the exterior body 3); the inner layer sheet 32. And disposed on the inner surface side of the outer layer sheet 31, and forming an inner surface of the diaper 1 (the skin abutting surface of the outer body 3); and a plurality of linear or strip-shaped elastic members 5, 6, and 7, They are fixed between the two sheets 31, 32 by an adhesive. The two sheets 31 and 32 are joined to each other at a specific portion by an adhesive or a heat seal or the like (not shown).

The exterior body 3 (the outer layer sheet 31 and the inner layer sheet 32) contains a resin material and is formed mainly of the resin material. As one of the exterior body 3 (outer layer sheet 31, inner layer sheet 32) For example, a synthetic resin containing a heat-fusible property such as polyethylene, polyethylene terephthalate or polypropylene may be used as the resin material, and includes a nonwoven fabric, a film, a laminate of a nonwoven fabric and a film, and the like. Examples of the nonwoven fabric include hot air non-woven fabric, hot roller non-woven fabric, water jet non-woven fabric, spunbond non-woven fabric, and melt-blown non-woven fabric.

As shown in FIG. 2, one of the pair of side seal portions 4, 4 of the diaper 1 has a sealing edge portion 41 which is a portion of the front body piece F in the outer body member 3 and the back body piece R. The edge portion of the exterior body 3 is formed by joining together the continuous linear fusion portions 40 extending in the longitudinal direction of the side seal portion 4. The sealing edge portion 41 of the diaper 1 is continuously formed over the entire length between the waist opening portion 8 and the leg opening portion 9 in the respective side seal portions 4, 4. The fused portion 40 in the sealing edge portion 41 is melted and solidified in a state in which the edges of the plurality of sheets (the outer layer sheet 31 and the inner layer sheet 32) constituting the outer casing 3 are overlapped. form.

The pants-type disposable diaper 1 having the above configuration can be produced by a method using the apparatus described below. The manufacturing method of the diaper 1 includes a superimposition pressurization step of forming a predetermined portion of the side seal portion in the strip-shaped outer casing 3 in a state in which the front body sheet side and the back body sheet side are overlapped, and a side seal a portion forming step of irradiating the predetermined portion of the side seal portion in the pressurized state with the light passing portion 27 through the light passing portion 27 extending in the direction intersecting the transport direction D of the outer casing 3, thereby The outer casing 3 is cut, and the cut edge portions of the outer casing are melted by the laminated state due to the cutting, and the side seal portion 4 is formed. Further, before the superimposing and pressurizing step, the main body fixing step of the absorbent body 2 is fixed to the belt-shaped outer casing 3 (the outer layer sheet 31 and the inner layer sheet 32).

More specifically, in the manufacturing method of the diaper 1, as shown in FIG. 4, in the above-described superposition and pressurization step, the belt-shaped outer casing 3 (outer layer sheet 31, inner layer sheet 32) is The front side of the belt-shaped outer body 3 to which the absorbent body 2 is fixed is overlapped with the side of the back body sheet, thereby manufacturing the "pants-type disposable diaper without a side seal portion". A diaper continuous body 10" connected in the direction. Then, in the above-described side seal portion forming step, the diaper is continuously continuous by irradiation of the laser light 30 using the apparatus shown in FIG. The strip-shaped outer casing 3 in the body 10 is cut one by one (melt-breaking), and at the same time, a plurality of sheets of the outer covering body 3 (the outer layer sheet 31 and the inner layer sheet) in the laminated state due to the cutting are produced. 32) The cut edge portions are fused to each other, and the pants-type disposable diaper 1 including the outer body 3 having the pair of side seal portions 4 and 4 is continuously manufactured.

As described in more detail, first, as shown in FIG. 4, the strip-shaped outer sheet 31 continuously supplied from the original sheet roll (not shown) is continuous with the original sheet roll (not shown). Between the strip-shaped inner layer sheets 32 to be supplied, the waist elastic members 5 forming the waist gathers and the web elastic members 6 forming the web wrinkles are respectively disposed in an extended state in which the elongation is extended at a specific elongation. The leg elastic members 7 forming the leg gathers. At this time, the leg elastic member 7 is disposed while forming a specific leg circumference pattern via a known rocking guide (not shown) that is orthogonal to the traveling direction of the sheet and reciprocates. Further, the strip-shaped outer layer sheet 31 and the strip-shaped inner layer sheet 32 are placed on a specific portion of the facing surface of either or both of the two sheets 31 and 32 before being superposed on each other. The hot melt type adhesive is applied by an adhesive applicator (not shown). Further, the elastic members such as the waist elastic member 5 and the abdominal elastic member 6 are slid across the portions of the two sheets 31 and 32 which are cut by the irradiation of the laser light (the predetermined portion of the side seal portion 4 is formed). In the case where the pattern of the predetermined portion indicated by the reference numeral 10C in Fig. 13 is arranged in an extended state, it is preferable to avoid the problem that the elastic member is largely contracted or the elastic member is detached after the cutting. An adhesive is applied to the portion and its vicinity. The waist elastic member 5 and the abdominal elastic member 6 may be attached to the waist elastic member 5 and the abdominal elastic member 6 by an adhesive applicator (not shown) before the waist elastic member 5 and the abdominal elastic member 6 are disposed between the two sheets 31 and 32. The hot melt type adhesive is applied intermittently.

Further, as shown in FIG. 4, the belt-shaped outer sheet 31 and the belt-shaped inner sheet 32 which are sandwiched between the waist elastic member 5, the abdominal elastic member 6, and the leg elastic member 7 are stretched in an extended state. The belt-shaped outer casing 3 in which a plurality of elastic members 5, 6, and 7 are disposed in an extended state between the belt-shaped sheets 31 and 32 is formed by being pressed between the pair of rolls 11 and 11. . Further, in the step of forming the exterior body 3, the convex roller 12 and the anvil roller 13 corresponding thereto are used. The joining mechanism forms a plurality of joints (not shown) for joining the strip-shaped outer layer sheet 31 and the strip-shaped inner layer sheet 32 between the adjacent two web-belt elastic members 6 and 6.

Thereafter, an elastic member pre-cutting mechanism (not shown) is used as needed, and a plurality of the abdominal web elastic members 6 and the plurality of leg elastic members 7 are pressed corresponding to the position at which the absorbent body 2 is disposed, and The way to express the contraction function is cut into a plurality of one by one. The elastic member cutting portion used in the method for producing a composite stretchable member described in JP-A-2002-253605, for example, is used.

Then, as shown in FIG. 4, an adhesive such as a hot-melt adhesive is applied to the absorbent main body 2 manufactured in another step, and the absorbent main body 2 is rotated by 90 degrees, and intermittently supplied to form a belt-shaped outer casing. The inner layer sheet 32 of the body 3 is fixed and fixed (main body fixing step). Then, as shown in FIG. 4, a leg hole LO' is formed inside the annular portion which is annularly surrounded by the leg elastic member 7 in the belt-shaped outer casing 3 in which the absorbent body 2 is disposed. The leg hole forming step can be carried out using a rotary cutter, a laser cutter, or the like in the same manner as in the prior art method of manufacturing the article.

Then, the tape-shaped exterior body 3 is folded in the width direction (direction orthogonal to the conveying direction of the exterior body 3). More specifically, as shown in FIG. 4, the both side portions 3a and 3a of the belt-shaped outer casing 3 in the conveying direction are folded back so as to cover both end portions of the absorbent body 2 in the longitudinal direction, and are fixedly absorbed. After the both ends of the main body 2 in the longitudinal direction, the outer casing 3 and the absorbent main body 2 are folded in the width direction thereof (the overlapping step in the superimposition pressurization step). The diaper continuum 10 is thus obtained.

Then, as shown in FIG. 5, the diaper continuous body 10 thus manufactured is irradiated with laser light by the laser bonding apparatus 20 to form a pair of side seal portions 4 and 4 (side seal portion forming step), and is continuously manufactured. A pants-type disposable diaper 1 having a pair of outer side bodies 3 of the side seal portion 4.

As described in the laser-type engagement device 20, as shown in FIG. 5, the laser-type engagement device 20 includes a hollow cylindrical roller 23 that can be driven to rotate in the direction of the arrow D; The head 35 is disposed in a hollow portion of the cylindrical roller 23, and irradiates the laser light 30 toward the cylindrical support member 21 that forms the circumferential surface portion of the cylindrical roller 23. The illumination head 35 has a lens that condenses the laser light 30. The cylindrical support member 21 has a first surface 21a facing outward and a second surface 21b facing inward. The above-described illumination head 35 is disposed on the second surface 21b side of the support member 21.

The support member 21 forms a circumferential surface portion (abutting portion that abuts against the workpiece) of the cylindrical roller 23, and is sandwiched and fixed to one of the annular frames of the both ends of the cylindrical roller 23 in the direction of the rotation axis ( Between not shown). The support member 21 is made of a metal material such as iron, aluminum, stainless steel, or copper, or a material having heat resistance such as ceramic.

The support member 21 has a light passage portion 27 through which laser light can pass. As shown in FIG. 5, the support member 21 has a slit-like opening portion 27 that penetrates the support member 21 in the thickness direction as a light passage portion. The opening portion 27 has a rectangular shape in plan view, and the longitudinal direction thereof intersects with the direction in which the diaper continuous body 10 (the belt-shaped outer casing 3) conveys the direction D, and more specifically, the rotation axis of the cylindrical roller 23. The axial length directions are parallel to each other and extend in a plurality of directions, and a plurality of spaces are provided in a circumferential direction (transport direction D) of the cylindrical support member 21 at a predetermined interval. The support member 21 passes the laser light through the opening 27, and does not pass (transmit) the laser light to the portion other than the opening 27. As a method of forming the opening portion 27 in the support member 21, there is a method in which the method 1) is a support member including a single annular member having the same length as the circumference of the annular frame (not shown). a specific portion of 21 is provided with an opening portion 27 by etching, punching, laser processing, or the like; and a method 2) using a plurality of curved rectangular members instead of a single annular member as the supporting member 21, Between a pair of frames (not shown), a plurality of members are disposed at a predetermined interval in the circumferential direction of the frame.

The laser bonding apparatus 20 includes a plurality of pressing heads 26 in addition to the above-described supporting member 21 and the irradiation head 35. The pressurizing head 26 is for pressurizing the diaper continuous body 10 supported on the first surface 21a of the support member 21 described above. Each of the pressurizing heads 26 is disposed on a second cylindrical roller that has a rotating shaft on an extension line of the rotating shaft of the cylindrical roller 23 and is adjacent to the cylindrical roller 23 . 25 weeks. The second cylindrical roller 25 rotates in synchronization with the cylindrical roller 23. Further, in FIG. 5, each of the pressurizing heads 26 is attached to the second cylindrical roller 25 which is a member different from the cylindrical roller 23, but the pressurizing heads 26 may be attached to the cylindrical roller 23 instead.

The second cylindrical roller 25 rotates in synchronization with the cylindrical roller 23, whereby each of the pressing heads 26 can be in the same direction as the rotation direction of the support member 21 constituting the cylinder of the cylindrical roller 23 and with the support member 21 The same speed as the peripheral speed is rotated around the peripheral surface of the support member 21.

The pressurizing head 26 shown in Figs. 6 to 10 has a longitudinal direction X ₁ and a width direction Y ₁ orthogonal thereto, and has a shape elongated in the longitudinal direction X ₁ . The pressurizing head 26 is disposed such that its longitudinal direction X ₁ is orthogonal to the circumferential direction of the cylindrical support member 21, that is, the transport direction of the diaper continuous body 10, and the width direction Y _{1 is} oriented toward the cylindrical shape. The circumferential direction of the support member 21, that is, the direction in which the diaper continuous body 10 is conveyed in the same direction. The pressurizing head 26 has a body portion 50A and a pressurizing portion 50B. The main body portion 50A has a longitudinal direction X ₁ and a width direction Y ₁ orthogonal thereto, and includes a block elongated in the longitudinal direction X ₁ . The main body portion to one longitudinal end 50A X ₁ has the distal portion 52a, and the other end having a rear end portion 52b. A connecting member 53 is connected to the rear end portion 52b. The body portion 50 has a body hollow portion 51 therein. The body hollow portion 51 has a circular cross section and extends in the longitudinal direction X _{1 of} the body portion 50. The body hollow portion 51 is in communication with the connecting member 53 at a position of the rear end portion 52b of the body portion 50. The connecting member 53 is connected to a suction mechanism (not shown).

The pressurizing portion 50B includes a pair of partial pressing members 54, 54 which are suspended from the lower surface of the body portion 50A. The partial pressing member 54 has a vertically long plate shape extending in the longitudinal direction X ₁ and is formed integrally with the body portion 50A. The partial pressing member 54 has a specific thickness in the width direction Y _{1 and} a lower surface thereof is a pressing surface 54A. The pressing surface 54A is a flat surface. The partial pressing member 54 is for partially pressing the sheet laminated body 10 supported on the first surface 21a of the supporting member 21 by the pressing surface 54A thereof.

The 54,54 Y ₁ in the width direction arranged in parallel to one pair of empty local pressurizing member of a specific interval so as not to contact. Therefore, a space S is provided between the pair of partial pressing members 54, 54. The space S extends along the length direction X _{1 of} the pressurizing head 26 and also extends in the longitudinal direction of the pressurizing head 26. Further, the space S communicates with the main body hollow portion 51 provided inside the main body portion 50A. The space S is open at the lower end of the pair of partial pressing members 54, 54. This opening functions as an air suction port 55. As described above, since the space S communicates with the main body hollow portion 51, the main body hollow portion 51 communicates with the connecting member 53, and the connecting member 53 is connected to a suction mechanism (not shown), so that the suction mechanism is actuated Air is sucked toward the inside of the pressurizing head 26 through the air suction port 55. In this manner, the pressurizing head 26 is provided with an air suction portion having an air suction port 55. That is, the pressurizing head 26 has two functions of pressurizing the sheet laminate 10 supported on the first surface 21a of the support member 21, and sucking and removing the laser light. The function of the gas produced by the irradiation of 30.

The width of the air suction port 55 (FIG. 7 (b), the length in the width direction Y ₁₎ than the width of the slit-shaped opening portion 21 of the support member 27 of the above-described (length along the circumferential direction of the support member 21 of )Big. However, the width of the air suction port 55 may be equal to the width of the slit-shaped opening portion 27 or the width of the air suction port 55 may be smaller than the width of the slit-shaped opening portion 27 as appropriate. The length of the air suction port 55 (the length in the longitudinal direction X ₁ in Fig. 7(a)) may be larger than the length of the predetermined portion (side seal portion) of the diaper. In the present embodiment, the length of the air suction port 55 is larger than the length of the slit-shaped opening portion 27 in the support member 21 (the length in the axial direction of the support member 21). Further, the pressurizing head 26 is disposed so as to be in contact with the first surface as the support member 21 so that the air suction port 55 formed in the pressurizing head 26 covers the slit-shaped opening portion 27 of the support member 21 as a whole. Surface outside 21a. In other words, the air suction port 55 extends in the same direction as the direction in which the slit-shaped opening portion 27 provided in the support member 21 extends, and is disposed to face the slit-shaped opening portion 27.

As is apparent from the above, the partial pressing member 54 is attached to the first surface 21a side of the supporting member 21, as shown in Fig. 8, with the pressing surface 54A extending to the air suction port 55. The direction is the same and the pressing surface 54A is located at the position of the air suction port 55 A pair is disposed adjacent to the air suction port 55.

The pressurizing head 26 further includes a pair of tension applying members 56, 56. The tension applying member 56 is for applying tension to the sheet laminated body 10 supported on the first surface 21a of the supporting member 21. The tension applying member 56 has a vertically long plate shape extending in the longitudinal direction X ₁ of the pressurizing head 26, and has a specific thickness in the width direction Y ₁ . 8, in the present embodiment, the tensioning member 56 along the longitudinal direction X of _a length longer than the air suction port 55, and the forward and rearward from the rear end X ₁ before the air suction port 55 of the longitudinal direction of Extension. However, the length of the tension imparting member 56 does not have to be longer than the air suction port 55, and may be equal to or shorter than the air suction port 55. The pair of tension applying members 56 and 56 are disposed so as to extend in the same direction as the extending direction of the air suction port 55 and to sandwich the pair of partial pressing members 54. Further, the pressurizing head 26 is provided with one pair of the fixing plates 58 so as to sandwich the pair of tension applying members 56.

9, the tension imparting member 56, X ₁ is provided with a plurality of openings 56a in the longitudinal direction. The opening 56a is a long hole that is long in the longitudinal direction. Similarly, the fixing plate 58 located on the outer side in the width direction Y ₁ of the tension applying member 56 is provided with a plurality of openings 58a in the longitudinal direction X ₁ . On the other hand, on the side face of the pressing member from the surface under the drop in the body of the pressing head portion 265 054, the longitudinal direction X ₁ is provided with a plurality of screw holes 54a. The interval between the openings 56a and 58a and the interval between the screw holes 54a are the same. When the tension applying member 56 and the fixing plate 58 are attached to the side surface of the partial pressing member 54, they are disposed so as to overlap each other. In addition, the tension applying member 56 is disposed on the side surface of the partial pressing member 54, and the fixing plate 58 is disposed on the outer surface of the tension applying member 56, and is disposed in the opening 56a provided in the tension applying member 56 and on the opening 56a. A bolt 57 is inserted into the opening 58a of the fixing plate 58, and the bolt 57 is screwed to the screw hole 54a provided in the partial pressing member 54, whereby the tension applying member 56 and the fixing plate 58 are fixed to the partial pressing member 54. The fixing plate 58 is used for the purpose of dispersing the pressure of the bolt to prevent the tension applying member 56 from being excessively deformed by the bolt locking.

The tension imparting member 56 is fixed to the side of the partial pressing member 54 by bolt locking In the case of the surface, as shown in Fig. 7(b), the lower surface of the tension applying member 56, that is, the opposing surface 56A opposed to the diaper continuous body 10 supported on the first surface 21a of the supporting member 21 is partially pressurized. The pressing surface 54A of the member 54 protrudes downward. When the sheet laminated body 10 supported on the first surface 21a of the supporting member 21 is pressurized by the pressurizing head 26, the sheet laminated body is applied to the pressing surface 54A of the partial pressing member 54. Before the pressing, the lower surface 56A of the tension applying member 56 abuts against the diaper continuous body 10. The degree of protrusion of the tension applying member 56 can be adjusted by inserting the bolt 57 into the opening 56a formed by the long hole of the tension applying member 56 when the tension applying member 56 is bolt-locked. The degree of protrusion of the tension imparting member 56 changes.

The tension applying member 56 is made of a flexible material. Thereby, the tension of the diaper continuous body 10 supported on the first surface 21a of the support member 21 can be easily applied locally. The specific method of imparting tension will be described below. As the flexible material constituting the tension applying member 56, an elastic material such as natural rubber or synthetic rubber can be used.

The operation of the pressurizing head 26 having the above configuration is shown in Fig. 10. FIG. 10 is a view schematically showing a main part of a cross section of the laser bonding apparatus 20. This drawing is a longitudinal sectional view of the rotating shaft of the cylindrical roller 23 and the support member 21. As shown in the figure, the pressing head 26 to the longitudinal direction X _1, in other words an end of the extension 55 is provided in the direction of the air suction port 26 of the head pressing portion 52b has a rear end that is hinge structure of the support portion 24. The support portion 24 is attached to the second rotating roller 25. Further, the pressurizing head 26 can be pivotally moved in the plane passing through the rotating shaft of the supporting member 21, for example, in the paper surface of Fig. 10, with the support portion 24 as a fulcrum. The range in which the pressing head 26 performs the shaking motion is as follows: as shown in FIG. 10, the pressing surface 54A of the pressing head 26 sufficiently leaves the circumferential surface of the supporting member 21 without interfering with the diaper introduced to the peripheral surface of the supporting member 21. The state of the continuous body 10 (for example, in the state shown in FIG. 10, the state in which the pressurizing head 26 shown on the upper side is orthogonal to the circumferential surface of the support member 21) to the state in which the pressurizing surface 54A is parallel to the circumferential surface of the support member 21 ( The range up to the state shown in the lower side of Fig. 10). In the shaking range, the pressing head 26 performs a rocking motion while rotating around the circumferential surface of the supporting member 21, and the partial pressing member 54 of the pressing head 26 is opposite to the supporting member 21 during the circumferential rotation. The 1st surface 21a repeatedly performs the joining/separating operation.

In order to shake the pressurizing head 26, a well-known mechanism can be used suitably. For example, a cam mechanism can be used, or a cylinder mechanism can be used, or a servo motor can be used.

Instead of causing the pressurizing head 26 to move, the pressurizing head 26 may perform other movements, and the partial pressurizing member 54 of the pressurizing head 26 may be rotated while the pressurizing head 26 is rotated around the peripheral surface of the support member 21. The contact/separation operation is performed with respect to the first surface 21a of the support member 21. For example, the pressurizing head 26 can be configured to reciprocate in the diameter direction of the support member 21. Thereby, the pressurizing head 26 reciprocates in the diameter direction of the support member 21 while the pressurizing head 26 is rotated around the circumferential surface of the support member 21, whereby the pressurizing head 26 is opposed to the support member 21 The 1st surface 21a repeatedly performs the joining/separating operation. The mechanism for reciprocating the pressurizing head 26 is similar to the mechanism for causing the rocking motion, for example, by using a cam mechanism, using a cylinder mechanism, or using a servo motor.

Fig. 11 is a schematic view showing a state in which the oscillating motion of each of the pressurizing heads 26 is rotated around the peripheral surface of the support member 21. Further, in the figure, the diaper continuous body 10 supported by the first surface 21a of the support member 21 is cut to become a single diaper 1 when it is detached from the support member 21, but for convenience of explanation, in the figure Painted as a continuum. The state of each of the pressurizing heads 26 differs depending on each position in the first surface 21a of the support member 21. When viewed in the circumferential direction of the support member 21, the state of the pressurizing head 26 is roughly divided into an open state A, a rocking process state B1, a pressurization state C, and a rocking process state B2. Further, such an operation of the pressurizing head 26 indicates an example of the present invention, and the pressurizing head 26 performs an operation different from the above-described operation to cut the diaper continuous body 10 without any hindrance.

The open state A is approximately the same as the range from the first surface 21a of the diaper 1 as the product to the first surface 21a of the support member 21, and the diaper continuous body 10 as the processing object is supported by the first surface 21a of the support member 21. range. The pressurized state C is located at a center angle width of a sector having a 180 degree opposite side with respect to the open state A and having a relatively open state A The range of the fan shape of the center angle. When viewed in the direction of rotation of the support member 21, the state of the rocking process occurs between the transition from the open state A to the pressurized state C (shake process state B1), and also between the self-pressurization state C and the open state A. Appears (shake process state B2).

The open state A is a state shown in the upper side of FIG. 10 described above, and the pressurizing surface 54A of the pressurizing head 26 is sufficiently separated from the circumferential surface of the support member 21. By the state in which the diaper 1 as a product is separated from the support member 21 and the diaper continuous body 10 as a processing object is supported by the first surface 21a of the support member 21 in an open state A, it can be easily handled as a product. Take out the diaper 1. Moreover, the diaper continuous body 10 as a processing object can be easily introduced to the first surface 21a of the support member 21.

The state of the pressurized state C shown in the lower side of FIG. 10 is a state in which the pressing surface 54A of the pressurizing head 26 is parallel to the circumferential surface of the support member 21. In this state, the diaper continuous body 10 supported on the first surface 21a of the support member 21 is reliably pressurized by the pressurizing head 26, and is melted and broken by the laser light 30 in the pressurized state, so that the diaper continuous body can be smoothly and smoothly The subsequent fusion is carried out.

In the shaking process state B1, the pressing of the pressurizing head 26 in the open state is started, and the pressurizing surface 54A of the pressurizing head 26 approaches the first surface 21a of the support member 21. On the other hand, in the shaking process state B2, the pressing of the pressurizing head 26 in the pressurized state is started, and the pressurizing surface 54A of the pressurizing head 26 is separated from the first surface 21a of the support member 21.

As described above, in the present embodiment, when one of the pressurizing heads 26 is focused on, the pressurizing head 26 performs the circumferential rotation motion along the circumferential surface of the support member 21, and the open state A→the tendency is added. The state of the shaking process B1 → the pressurized state C → the state of the shaking process B2 that tends to open is the one-cycle operation.

12(a) to (c), the state in which the pressurizing head 26 in the shaking process state B1 is in the pressurized state C is sequentially shown. Fig. 12 (a) shows a state immediately before the pressurizing head 26 is brought into the pressurized state C. In this state, the partial pressing member 54 of the pressurizing head 26 does not abut against the diaper continuous body 10 supported by the first surface 21a of the supporting member 21. Similarly, the tension of the pressurizing head 26 The imparting member 56 also does not abut against the diaper continuum. Further, in the enlarged view shown in the circle of the single-dot chain line in Fig. 12 (a), the illustration of the diaper continuous body 10 is omitted for convenience of explanation.

When the rocking motion is performed from the state shown in Fig. 12 (a), the pressurizing head 26 abuts against the diaper continuous body 10 as shown in Fig. 12 (b). At this time, before the pressurization of the partial pressing member 54 in the pressurizing head 26 presses the diaper continuous body 10, the pair of tension applying members 56 abut against the diaper continuous body 10, sandwiching the slit-like shape The diaper continuous body 10 is pressed against the both sides of the opening portion 27. When the shaking of the pressurizing head 26 is further performed and the abutment of the tension applying member 56 is further performed, one of the flexible material members is deformed in such a manner that the tension applying member 56 is separated from each other in the conveying direction of the diaper continuous body 10. . By this deformation, the distance between the two pressing positions of the tension applying members 56 is increased, so that the tension is applied to the diaper continuous body 10 between the two pressing positions. For the purpose of deforming the tension applying members 56 so as to be apart from each other in the conveying direction of the diaper continuous body 10, it is preferable to position the supporting members 21 at both sides of the slit-like opening portion 27. As shown in the enlarged view of Fig. 12(a), the first surface 21a is gradually lower than the opening end of the opening portion 27 as it goes away from the opening portion 27. In the present embodiment, since the support member 21 has a curved shape along the cylindrical shape, the first surface 21a at a position sandwiching the both sides of the opening portion 27 naturally becomes lower than the opening portion 27 as it moves away from the opening portion 27. Open end.

When the rocking motion is performed from the state shown in Fig. 12 (b), as shown in Fig. 12 (c), the diaper continuous body 10 is pressed by the pair of tension applying members 56 and the tension accompanying it. The pressure of the partial pressing member 54 is locally pressurized against the diaper continuous body 10 in a state where the generation is maintained. The pressurization by the partial pressing member 54 is the position between each of the pressing positions of the tension applying members 56 and the slit-shaped opening portion 27. In other words, the diaper continuous body 10 supported on the first surface 21a of the support member 21 is partially pressurized by the partial pressing member 54 at a position sandwiching the slit-shaped opening portions 27. The diaper continuous body 10 located in the pair of partial pressing members 54 constitutes the diaper joint by locally applying pressure only at the position. The plurality of sheets of the continuum 10 are indeed in close contact. The diaper continuous body 10 is irradiated with the laser light 30 in a close contact state by the local pressurization. Further, the gas generated by the irradiation of the laser light 30 is sucked by the air suction port 55 (refer to FIG. 8 or the like) provided in the air suction portion of the pressurizing head 26 as shown in FIG. 12(c). And removed.

As described above, in the present embodiment, the diaper continuous body 10 is irradiated by the irradiation of the laser light 30 by the air suction portion disposed on the first surface 21a side of the support member 21 supporting the diaper continuous body 10. The gas generated during processing allows the gas to be efficiently sucked. Therefore, it is possible to effectively prevent ignition or the like caused by resin fumes or the like contained in the gas. Further, since it is possible to preferably prevent the generated smoke from adhering to the pressurizing surface 54A of the support member 21 or the pressurizing head 26, it is possible to effectively prevent the deposit from being transferred to the product to cause a defective product.

Further, in the present embodiment, the tension of the diaper continuous body 10 is applied to the diaper continuous body 10 before the partial pressing of the diaper continuous body 10 by the partial pressing member 54, so that the diaper continuous body 10 is melted by the irradiation of the laser light 30. After the disconnection, the two portions which are melted and broken are instantaneously separated by the action of the tension, so that the occurrence of remelting can be effectively prevented. Further, by applying tension to the diaper continuous body 10, the portion to be irradiated with the laser light 30 is less likely to be slack, so that the overlap of the sheets due to the slack and the lamination of the sheets due to the overlap can be effectively prevented. The increase in the appearance of the number of sheets results in poor melt disconnection.

Further, in the present embodiment, the diaper continuous body 10 is partially pressurized only at positions on both sides of the slit-shaped opening portion 27, and the laser light 30 is irradiated in the partial pressurized state, so that it is possible to surely The respective sheets constituting the diaper continuous body 10 are fused to each other to form a fused portion 40 having sufficient strength (see FIGS. 2 and 14).

As described above, in the present embodiment, the diaper continuous body 10 is continuously conveyed, and one surface of the diaper continuous body 10 is brought into contact with the peripheral surface portion forming the cylindrical roller 23 and has a slit-like opening through which the laser light 30 can pass. The first surface 21a of the support member 21 of the portion 27 (light passage portion), and the diaper continuous body 10 (side seal) which is pressurized by the support member 21 and the pressurizing head 26. The portion 4 to be formed in the portion 4 is irradiated with the laser light 30 from the side of the second surface 21b of the support member 21 via the opening portion 27, whereby the diaper continuous body 10 is cut, and at the same time, the cut is generated. The cutting edge portions of the plurality of sheets (outer body 3) in the pressurized state are fused together in a state of being overlapped to form the side seal portion 4 (side seal portion forming step).

(a) to (c) of the present invention, the diaper continuous body 10 (the strip-shaped sheet laminate) is cut by the laser bonding apparatus 20, and the side seal portion 4 (sealing edge portion) is formed at the same time. A diagram to illustrate. In Fig. 13(a), the predetermined portion 10C (the predetermined portion where the side seal portion 4 is formed) of the diaper continuous body 10 using the laser light 30 and its vicinity are schematically shown. The predetermined portion 10C of the diaper continuous body 10 in the illustrated state is the center of the longitudinal direction (transport direction D) in the region of the diaper continuous body 10 in which the absorbent body 2 is not disposed. The opening end portion of the waist opening portion 8 (see FIG. 1) of the cutting-predetermined portion 10C and the vicinity thereof are eight-layer structure portions in which eight sheets are overlapped, and the other portions are formed by overlapping four sheets. The 4th structural part. The four-layer structure portion includes two sheets (the outer layer sheet 31 and the inner layer sheet 32) constituting one sheet of the outer casing 3 in the front side portion 1A as shown in Fig. 13 (a), and the back side portion. In the 1B, the same two sheets 31 and 32 of one outer casing 3 are formed, and the four sheets are laminated. On the other hand, the eight-layer structure portion is formed by folding the both side portions 3a, 3a of the belt-shaped outer casing 3 so as to cover both ends in the longitudinal direction of the absorbent body 2 when the diaper continuous body 10 is manufactured as described above. (see FIGS. 3 and 4), therefore, in each of the front side portion 1A and the back side portion 1B, there are two outer casings 3, and a total of four outer casings 3 and 3 are stacked, and as a result, The eight sheets 31 and 32 are laminated to each other. Further, each of the four-layer structure portion and the eight-layer structure portion is provided with an elastic member such as the waist elastic member 5 and the abdominal portion elastic member 6 interposed between the sheets 31 and 32 which are overlapped with each other, but In the above-described FIG. 4, the illustration of the elastic member is omitted from the viewpoint of easy explanation. Hereinafter, the four-layer structure portion will be mainly described. However, unless otherwise specified, the eight-layer structure portion is also formed in the same manner as the four-layer structure portion to form the side seal portion 4.

The dicing joint portion 10C of the 4-layer structure in the diaper continuous body 10 constitutes a diaper company Either or both of the outer layer sheet 31 and the sheet (the inner layer sheet 32) other than the sheet constituting the one surface of the continuous body 10 are absorbed laser light 30 After the heat of the sheet. In the illustrated embodiment, all of the four sheets 31 and 32 constituting the cutting-predetermined portion 10C are sheets (non-woven fabric) which generate heat after the absorption of the laser light 30. Further, the cut-and-predetermined portion 10C and the two adjacent sheets of the outer layer sheet 31 and the inner layer sheet 32 which are overlapped with each other may be joined by an adhesive or the like before the irradiation of the laser light 30, or may be completely absent. Engage.

As shown in Fig. 13 (b), the diaper continuous body 10 is in contact with the support member 21 with one surface 10a, and the predetermined portion 10C (the predetermined portion where the side seal portion 4 is formed) is placed on the slit-shaped opening portion 27, It is introduced into the support member 21 that rotates in the direction of the arrow D, and the partial pressing member 54 of the pressurizing head 26 is pressed against the other surface 10b, thereby being conveyed in the direction of the arrow D and pressurized (compressed) in the thickness direction. Further, the laser beam 30 is irradiated to the cutting-predetermined portion 10C in the pressurized state during the above-described conveyance from the side of the support member 21 via the opening portion 27. As described above, the irradiation spot of the laser light 30 is configured to be arbitrarily movable in the circumferential direction of the cylindrical roller 23, and is set to move in accordance with the movement of the opening portion 27 in the circumferential direction, so that it is located on the opening portion 27. The cutting planned portion 10C continuously irradiates the laser light 30 for a fixed time during its conveyance.

When the laser beam 30 is irradiated to the predetermined portion 10C of the four-layer structure, the forming material (fiber or the like) of the sheets 31, 32 existing in the predetermined portion 10C is heated by the direct light of the laser light 30. The formation material which is present in the vicinity of the cutting planned portion 10C is indirectly heated and melted by the laser light 30. The vaporized gas is sucked into the pressurizing head 26 through the air suction port 55 of the pressurizing head 26 as described above, and is discharged to the outside.

As a result of the melting of the predetermined portion 10C, as shown in FIG. 13(c), the predetermined portion 10C having the four-layer structure is melt-broken and one single-piece sheet laminate is cut out from the diaper continuous body 10. In the form of (diaper precursor), the diaper continuous body 10 is cut, and at the same time, the cut edges of the four sheets 31, 32 in the one-piece sheet laminate produced by the cutting are produced The cut edges of the four sheets 31, 32 of the diaper continuous body 10 which are cut and cut, are fused to each other. Before the cutting edges are formed from each other (using the laser light 30) Before the diaper continuous body 10 is cut and cut, it is brought into a pressurized state (compressed state) by being sandwiched between the support member 21 and the pressurizing head 26. According to the method of manufacturing the diaper according to the illustrated aspect, the cutting of the strip-shaped outer casing 3 and the two places produced by the cutting are simultaneously pressurized by the irradiation of one laser light. Since the cutting edge portions of the outer casing 3 are fused to each other, it is possible to perform fusion in the same step by using about half of the laser output by the method of fusing the fusion portions of the two places by irradiation of two laser beams. And cutting, the diaper 1 can be manufactured efficiently.

The cut edge portion of the sheets 31 and 32 is heated and is in a molten state immediately after the irradiation of the laser light 30, but is cut out from the diaper continuous body 10 by the irradiation of the laser light 30. In the state in which the pressurized state of the diaper precursor and the diaper continuous body 10 is maintained by the support member 21 and the pressurizing head 26, after the irradiation is completed, the external air is rapidly cooled and solidified to become the cut edge portion. The forming material (fiber or the like) is melted and integrated into the fusion portion 40. One of the pair of side seal portions 4, 4 of one diaper 1 is formed by forming the welded portion 40 in this manner. In the present embodiment, the air is sucked from the opening portion 27 by the air suction port 55 of the pressurizing head 26, so that the high-temperature smoke gas is quickly removed by the suction, and therefore, it is possible to cure the fusion portion 40. The advantage of a shorter time.

When the predetermined portion 10C to be cut (the predetermined portion where the side seal portion 4 is formed) is cut as described above, the laser beam 30 is incident on the other opening portion adjacent to the direction opposite to the transport direction D by the irradiation spot. The mode of 27 is moved, and the other opening portion 10C located on the other opening portion 27 is irradiated via the other opening portion 27. Thereby, the other cutting predetermined portion 10C is cut and fused in the same manner as described above, and the other side sealing portion 4 (welding portion 40) that is paired with the side seal portion 4 formed before is formed. Thereafter, by performing the same operation in reverse, the pants-type disposable diaper 1 including the outer casing 3 having the pair of side seal portions 4 and 4 can be continuously manufactured.

In the diaper 1 thus manufactured, as shown in FIG. 14, the side seal portion 4 is formed densely. The sealing edge portion 41 is a continuous portion extending from the edge portion of the outer casing 3 in the front piece F and the outer casing 3 in the back piece R in the longitudinal direction of the side sealing portion. The linear fusion portions 40 are combined. Further, the thickness T of the fusion portion 40 is the same as or smaller than the total thickness (Ta + Tb) of the exterior body.

Further, as shown in FIG. 14, the seal edge portion 41 includes a shape in which the outer edge 4a of the fusion portion 40 is recessed toward the inner side of the diaper 1 in a cross section orthogonal to the direction in which the side seal portion 4 is worn. Further, as shown in FIG. 14, the sealing edge portion 41 is located outside the fusion portion 40 in the inner and outer directions P, and does not have a portion in which the constituent fibers of the outer casing 3 have a fiber shape. Therefore, the appearance is beautiful and the touch is improved.

When the laser light is applied to the diaper continuous body 10 (the tape-shaped exterior body 3), the sheet (the outer layer sheet 31 and the inner layer sheet 32) constituting the exterior body 3 is used. Laser light of a wavelength that causes the sheet to heat up after absorption. Here, the "sheet constituting the exterior body" is not limited to the sheet constituting one surface of the exterior body (the surface abutting on the support member 21) (for example, the outer layer sheet 31 in the above-described aspect). Any sheet may be used as long as it is a sheet constituting the exterior body. The relationship between the laser light irradiated to the exterior body and the wavelength of the sheet material used for the individual sheet constituting the exterior body, which is absorbed by the sheet, and which causes the sheet to generate heat, is related to the wavelength of the laser light used. Decide. When the sheet constituting the exterior body is a synthetic resin-made nonwoven fabric or film which is commonly used for absorbent articles such as disposable diapers or sanitary napkins (hygiene articles), it is preferable to use CO ₂ Ray as the laser light. Injection, YAG (yttrium-aluminum-garnet, yttrium aluminum garnet) laser, LD (laser diode) laser (semiconductor laser), YVO ₄ laser, fiber laser, etc. Further, when the sheet constituting the exterior body contains polyethylene, polyethylene terephthalate, polypropylene or the like as a synthetic resin, the wavelength at which the sheet can be favorably heated after being absorbed by the sheet It is preferable to use, for example, 8.0 μm or more and 15.0 μm or less, and particularly preferably 9.0 μm or more and 11.0 μm or less of the oscillation wavelength of the CO ₂ laser which is used in a high-output laser device. The spot diameter and the laser output of the laser light can be appropriately selected in consideration of the material or thickness of the sheet constituting the exterior body.

The present invention has been described above based on the embodiments, but the present invention is not limited to the above embodiments, and can be appropriately modified. For example, in addition to the four sheets of sheets shown in Fig. 13 (a), the strip-shaped outer casing (sheet laminate) may be overlapped by two, three or five sheets. Founder.

Further, in the above-described embodiment, the exterior body 3 is not divided into the front side portion 1A and the back side portion 1B as shown in FIG. 3, and has an hourglass extending through the front side portion 1A, the lower portion 1C, and the back side portion 1B. The shape of the continuous shape is not limited to such a continuous shape, and may be divided into, for example, a belly sheet member disposed on the ventral side (front side) of the wearer, and The back side sheet member disposed on the back side (rear side) of the wearer, and the absorbent body is erected on the two sheet members to be fixed. The above-described superimposition and pressurization step in the method for producing a pants-type disposable diaper having such a divided type outer casing is such that a predetermined portion of the side seal portion in the belt-shaped outer casing having the following configuration is pressurized. In this configuration, the belt-shaped outer casing to which the absorbent body is fixed is placed on the front side (the belt-shaped abdominal sheet member) and the back piece side (the belt-shaped back side sheet member).

Further, in the above-described embodiment, before the above-described superposition and pressurization step, as shown in Fig. 4, the belt-shaped outer casing 3 is conveyed in the conveying direction on both side portions 3a, 3a, that is, the belt-shaped outer layer sheet 31. Each of the strip-shaped inner layer sheets 32 is folded back so as to cover both end portions of the absorbent body 2 in the longitudinal direction in the transport direction, but the width direction (the direction orthogonal to the longitudinal direction) may be used. The inner sheet member 32 having a length longer than the strip shape is used as the strip-shaped outer sheet 31, and when the two sheets 31 and 32 are overlapped, only the outer sheet 31 is extended from the side edge of the inner sheet 32 to the outer side. The extension portion is folded back so as to cover both end portions of the absorbent body 2 in the longitudinal direction. At this time, the opening end portion of the waist opening portion 8 of the cut portion 10C of the diaper continuous body 10 and the vicinity thereof are six-layer structure portions in which six sheets are overlapped, and the other portions are four sheets overlapping. It is a 4-layer structure. Further, the both side portions 3a and 3a of the belt-shaped outer casing 3 in the conveying direction, that is, the strip-shaped outer layer sheet 31 and the strip-shaped inner layer sheet 32 may not be folded in the conveying direction.

Further, in the above embodiment, the laser bonding apparatus 20 including the cylindrical roller 23 is used. However, a laser bonding apparatus 20 having a flat member instead of the cylindrical roller 23 may be used.

Further, the above embodiment relates to a pants-type disposable diaper which is an example of a sheet-fused body, but the present invention can also be provided in the same manner when producing a sheet-fused body of another form.

In the above-described embodiments of the present invention, the following supplementary notes (manufacturing method and manufacturing apparatus of sheet fusion body) will be further disclosed.

<1>

An apparatus for producing a sheet-fused body, comprising: a support member having a first surface in which a sheet-melting body having a sealing edge portion in which edges of a plurality of sheets are fused together is overlapped; And a strip-shaped sheet laminate in which at least a part of the plurality of sheets containing the resin material are stacked on the second surface opposite to the first surface, and supported on the first surface in the longitudinal direction thereof; An irradiation head disposed on a second surface side of the support member and having a lens for collecting laser light; and the support member having laser light that can be irradiated from the second surface side and passing through the sheet laminate The slit-shaped opening portion having a long width direction is disposed at a position on the first surface side of the support member so as to be opposed to the slit-shaped opening portion to suck air from the opening portion. The air suction portion irradiates the sheet laminated body supported on the first surface of the support member with the laser light from the second surface side along the slit-shaped opening portion, and spreads the sheet laminated body over the width thereof. Direction cutting, at the same time, will Cutting edge portions of an overlapped state of the manufactured fused fusing sheet having the sealing edge portion, the above-described air suction and by sucking and removing the portion of the gas generated by the cutting.

<2>

The apparatus for manufacturing a sheet fusion material according to the above <1>, wherein the support member is formed of a cylinder having a first surface facing outward and a second surface facing inward, and rotatable in one direction, and further comprising supporting the above a pressurizing head for pressurizing the sheet laminate on the first surface of the support member, wherein the pressurizing head includes the air suction portion, and may be in the same direction as the rotation direction of the support member, and The speed at which the peripheral speed of the support member is the same is rotated around the circumference of the support member.

<3>

The apparatus for manufacturing a sheet fusion body according to the above <1>, wherein the air suction portion has an air suction port that is in the same direction as the slit-shaped opening portion. It extends and is disposed to face the slit-shaped opening.

<4>

The apparatus for manufacturing a sheet fusion body according to the above <3>, wherein the pressurizing head includes a partial pressing member having a partial portion of the sheet laminated body supported on the first surface of the supporting member In the pressurized pressing surface, the partial pressing member is disposed such that the pressing surface extends in the same direction as the extending direction of the air suction port, and the pressing surface is located at a position sandwiching the air suction port. There is a pair.

<5>

The apparatus for producing a sheet-fused body according to the above <4>, wherein the pressurizing head further includes one of a tension applying member to the sheet laminated body supported on the first surface of the supporting member, and the pair of the above-mentioned The tension applying member is disposed to extend in the same direction as the extending direction of the air suction port and to sandwich the pair of partial pressing members, and the tension applying member is made of a flexible material and laminated with the sheet. The body facing surface is more prominent than the pressing surface of the partial pressing member, and the partial pressing is performed Before the pressurization of the member is pressed against the sheet laminate, the pair of tension applying members abut against the sheet laminate and are deformed away from each other, thereby giving a pair of the tensions The sheet laminate between the members imparts tension.

<6>

The apparatus for producing a sheet-fused body according to any one of the above-mentioned items, wherein the slit-shaped opening portion has a rectangular shape in plan view, and the longitudinal direction thereof and the sheet laminate body that travels The direction in which the transport directions intersect is uniform and extends, and a plurality of slots are provided with a certain interval.

<7>

The apparatus for producing a sheet fusing body according to any one of the above <4> to <6>, which comprises a plurality of the above-mentioned pressurizing heads.

<8>

The apparatus for producing a sheet-fused body according to any one of the above-mentioned items, wherein the length of the air suction port along the direction in which the sheet laminated body is conveyed is longer than the edge of the slit-shaped opening The sheet laminate has a long length in the conveying direction.

<9>

The apparatus for producing a sheet-fused body according to any one of the above-mentioned items, wherein the peripheral surface of the cylinder is provided with a plurality of the slits at a predetermined interval in the circumferential direction of the cylinder. a slit-shaped opening portion extending in a direction parallel to an axial length direction of a rotation axis of the cylinder, wherein the pressing head is surrounded by the pressing head along a circumference of the support member During the rotation, the partial pressing member of the pressing head repeatedly performs a contact/separation operation with respect to the first surface of the support member.

<10>

The apparatus for manufacturing a sheet fusing body according to the above <9>, wherein the pressurizing head has a support portion having a hinge structure at one end of the extending direction of the air suction portion, and the support can be supported by the support The fulcrum is a fulcrum that is oscillated by the surface of the rotating shaft of the support member, whereby the pressing head is brought into contact with/detached from the first surface of the support member.

<11>

The apparatus for manufacturing a sheet fusion material according to the above <9>, wherein the pressurizing head is reciprocally movable in a diameter direction of the support member, whereby the pressurizing head is in contact with the first surface of the support member/ Separation action.

<12>

A method for producing a sheet-fused body, which is a method for producing a sheet-fused body having a sealing edge portion in which edges of a plurality of sheets are fused together, and has a step of including at least a part of a resin material The strip-shaped sheet laminate in which the plurality of sheets are overlapped is supported on the first surface of the support member having the first surface and the second surface on the opposite side to the first surface in the longitudinal direction thereof And illuminating the sheet laminated body supported on the first surface of the supporting member with the irradiation head of the lens concentrating the laser light on the second surface side of the support member; In the slit-shaped opening portion in which the support member is long in the width direction of the sheet laminated body, the sheet laminated body is irradiated with laser light, and the sheet laminated body is cut in the width direction thereof, and at the same time, The cut edge portion is fused to form a sheet-fused body having the seal edge portion, and is sucked and removed by the air suction portion disposed on the first surface side of the support member. The gas produced.

<13>

The method for producing a sheet-fused body according to the above <12>, wherein the sheet laminate is supported on the first surface of the support member at a position sandwiching both sides of the slit-shaped opening portion. Partially pressurized, the sheet fusion body is irradiated with laser light under the partial pressure.

<14>

The method for producing a sheet fusion body according to the above <13>, which is characterized in that the slit is interposed Pressing the sheet laminate supported on the first surface of the support member at a position on both sides of the opening portion, thereby applying tension to the sheet laminate between the two pressing positions. In a state where tension is applied to the sheet laminated body, the sheet laminated body is locally pressurized at a position between each pressed position and the slit-shaped opening.

<15>

A manufacturing device for a pants-type disposable diaper, comprising the device according to any one of the above <1> to <11>, and for manufacturing a pants-type disposable diaper as a plurality of sheets The sheet-melting body of the sealing edge portion in which the edge portion is fused in an overlapping state is provided with a pair of side sealing portion outer casings.

<16>

A manufacturing apparatus for a pants-type disposable diaper according to the above <15>, which is used for manufacturing a pants-type disposable diaper comprising an absorbent body and an outer surface forming a diaper outer surface, and the front body piece The left and right side edges of the intermediate body in the longitudinal direction are joined to the left and right side edges of the outer body of the back body in the longitudinal direction to form a pair of side seal portions, a waist opening portion and a pair of leg openings The outer body is located on the non-skin abutting surface side of the absorbent body and fixes the absorbent body.

<17>

The apparatus for manufacturing a pants-type disposable diaper according to the above <15> or <16>, which is provided on the inner layer sheet constituting the belt-shaped outer casing, and intermittently supplied to the absorbent body manufactured in another step And fixing, and then forming a leg hole in the outer casing, and then folding the outer casing of the belt shape in a direction orthogonal to the conveying direction of the outer casing, thereby obtaining a diaper continuous body, and then using The laser bonding apparatus irradiates the diaper continuous body with laser light to form a pair of the side seal portions, and is continuously manufactured to have a pair of the side seal portions. The shorts type disposable diaper 1 of the body.

<18>

The apparatus for manufacturing a pants-type disposable diaper according to any one of the above-mentioned items, wherein the outer surface of the belt-shaped outer casing is covered in the conveying direction to cover the length of the absorbent body. After the both ends of the direction are folded back and the both ends of the longitudinal direction of the absorbent body are fixed, the outer casing and the absorbent body are folded in the direction orthogonal to the conveying direction of the outer casing.

<19>

The apparatus for manufacturing a pants-type disposable diaper according to the above <17> or <18>, wherein the above-described laser-type splicing device comprises: a hollow cylindrical roller rotatably driven; and an illuminating head disposed in the circle The hollow portion of the can roller is irradiated with laser light toward a cylindrical supporting member that forms a circumferential surface portion of the cylindrical roller.

[Industrial availability]

As described in detail above, according to the present invention, it is possible to manufacture a sheet fusing body which is effective in preventing the occurrence of fire or the like due to resin fumes, and which is excellent in flexibility and feel of the sealing edge portion, and which has sufficient fusion strength in practical use. .

10‧‧‧ diaper continuum

21‧‧‧Support components

21a‧‧‧The first side of the supporting member

26‧‧‧ Pressing head

27‧‧‧ openings

30‧‧‧Laser light

50A‧‧‧ Body Department

53‧‧‧Connecting components

54‧‧‧Local compression members

56‧‧‧Tension-giving components

D‧‧‧Transfer direction

Claims (19)

An apparatus for producing a sheet-fused body, comprising: a support member having a first surface in which a sheet-melting body having a sealing edge portion in which edges of a plurality of sheets are fused together is overlapped; And a second sheet surface on the side opposite to the first surface, wherein the strip-shaped sheet laminate in which at least a part of the resin material is superposed is supported on the first surface in the longitudinal direction thereof; and the irradiation a head disposed on a second surface side of the support member and having a lens for collecting laser light, and the support member having laser light that can be irradiated from the second surface side and passing through the sheet laminate The slit-shaped opening portion having a long width direction is disposed at a position on the first surface side of the support member so as to be opposed to the slit-shaped opening portion to suck air from the opening portion. The air suction unit irradiates the sheet laminated body supported on the first surface of the support member with the laser beam from the second surface side along the slit-shaped opening portion, and spreads the sheet laminated body in the width direction thereof. Cut off, at the same time, cut off Edge portions in an overlapping state of the manufactured fused fusing sheet having the sealing edge portion, the above-described air suction and by sucking and removing the portion of the gas generated by the cutting. The apparatus for manufacturing a sheet fusion material according to claim 1, wherein the support member is composed of a cylinder having a first surface facing outward and a second surface facing inward and rotatable in one direction, and further comprising a pair supported by a pressurizing head for pressurizing the sheet laminate on the first surface of the support member, wherein the pressurizing head includes the air suction portion, and may be in the same direction as the rotation direction of the support member, and Supports the same speed of the component Degree, rotating around the circumference of the support member. The apparatus for manufacturing a sheet fusing body according to claim 1, wherein the air suction portion has an air suction port extending in a same direction as a direction in which the slit-shaped opening portion extends, and The slit-shaped openings are arranged to face each other. A manufacturing apparatus of a sheet fusing body according to claim 3, wherein said pressurizing head comprises a partial pressing member having a partial addition to said sheet laminating body supported on said first surface of said supporting member In the pressure pressing surface, the partial pressing member is disposed such that the pressing surface extends in the same direction as the extending direction of the air suction port, and the pressing surface is located at a position sandwiching the air suction port. Correct. The apparatus for producing a sheet-fused body according to claim 4, wherein the pressurizing head further comprises a tension-applying member for imparting tension to the sheet laminate supported on the first surface of the support member, a pair of the tension The providing member is disposed to extend in the same direction as the extending direction of the air suction port and to sandwich the pair of partial pressing members, and the tension applying member is made of a flexible material and laminated with the sheet The facing surface is more protruded than the pressing surface of the partial pressing member, and the pair of tension applying members abuts before the pressing of the partial pressing member presses the sheet laminated body The sheet laminate is deformed so as to be apart from each other, whereby tension is applied to the sheet laminate between the pair of tension applying members. The apparatus for manufacturing a sheet-fused body according to claim 1, wherein the slit-shaped opening has a rectangular shape in plan view, and the longitudinal direction thereof extends in a direction intersecting with a direction in which the traveling sheet-layer-layered conveyance direction intersects. And a plurality of spaces are set at a certain interval. A manufacturing apparatus for a sheet fusing body according to claim 2, which comprises a plurality of said pressurizing head. The apparatus for manufacturing a sheet fusing body according to claim 3, wherein a length of the air suction port along a direction in which the sheet laminated body is conveyed is larger than a direction in which the slit-shaped opening portion is in a conveying direction of the sheet laminated body Long length. The apparatus for producing a sheet-fused body according to claim 2, which is provided on a circumferential surface of the cylinder, and is provided with a plurality of slit-shaped openings at a predetermined interval in the circumferential direction of the cylinder, and the slit The opening portion extends in parallel with a direction parallel to an axial length of the rotating shaft of the cylinder, and the pressing head is rotated while the pressing head rotates along a circumferential surface of the supporting member. The partial pressing member repeatedly performs a contact/separation operation with respect to the first surface of the support member. The apparatus for manufacturing a sheet fusing body according to claim 9, wherein the pressurizing head has a support portion of a hinge structure at one end of the air suction portion, and can support the support member as a fulcrum The in-plane rocking motion of the rotating shaft causes the pressing head to contact/disengage with respect to the first surface of the support member. The apparatus for manufacturing a sheet fusing body according to claim 9, wherein the pressurizing head is reciprocally movable in a diameter direction of the support member, whereby the pressurizing head is in contact with the first surface of the support member/ Separation action. A method for producing a sheet-fused body, which is a method for producing a sheet-fused body having a sealing edge portion in which edges of a plurality of sheets are fused together, and has a step of including at least a part of a resin material The strip-shaped sheet laminate in which the plurality of sheets are overlapped is supported on the first surface of the support member having the first surface and the second surface on the side opposite to the first surface in the longitudinal direction thereof; And self-disposed on the second surface side of the support member and having a laser light concentrating The illuminating head of the mirror is irradiated with the laser light toward the sheet laminated body supported on the first surface of the supporting member; and the slit-shaped opening portion which is long in the width direction of the supporting member and disposed in the width direction of the sheet laminated body The sheet laminated body is irradiated with the laser light, and the sheet laminated body is cut in the width direction thereof, and the cut edge portion is fused to form a sheet having the sealing edge portion. The fusion body is sucked by the air suction portion disposed on the first surface side of the support member, and the gas generated by the cutting is removed. A method of producing a sheet fusion body according to claim 12, wherein the sheet laminate body supported on the first surface of the support member is partially positioned at a position sandwiching the slit-shaped opening portion The ground pressure is applied to the sheet fusion body to irradiate the laser light under the partial pressure. The method for producing a sheet fusion material according to claim 13, wherein the sheet laminate is supported on the first surface of the support member at a position sandwiching both sides of the slit-shaped opening portion By applying tension to the sheet laminated body between the two pressing positions, the position between the respective pressing positions and the slit-shaped opening portion is set in a state where tension is applied to the sheet laminated body. The sheet laminate is locally pressurized. A manufacturing device for a pants-type disposable diaper, comprising the device of claim 1, and for manufacturing a pants-type disposable diaper, which is fused as an edge portion of a plurality of sheets in an overlapping state The sheet-fused body of the sealing edge portion is provided with a pair of side sealing portions. A manufacturing apparatus for a pants-type disposable diaper according to claim 15, which is for manufacturing a pants-type disposable diaper comprising an absorbent body and formed The outer surface of the outer surface of the diaper is joined to the left and right side edges of the outer body of the front body and the left and right side edges of the outer body of the back body in the longitudinal direction to form a pair of sides. The sealing portion, the waist opening portion, and the pair of leg opening portions, the exterior body is located on the non-skin contact surface side of the absorbent body, and the absorbent body is fixed. The apparatus for manufacturing a pants-type disposable diaper according to claim 15 which is attached to the inner layer sheet constituting the belt-shaped outer casing, intermittently supplied to the absorbent body manufactured in another step, and fixed. Then, the leg body is formed in the outer casing, and then the outer casing of the belt shape is folded in a direction orthogonal to the conveying direction of the outer casing, thereby obtaining a diaper continuous body, and then using a laser joint device The diaper continuous body is irradiated with laser light to form a pair of the side seal portions, and a pants-type disposable diaper having a pair of the side seal portion outer casings is continuously manufactured. The apparatus for manufacturing a pants-type disposable diaper according to claim 15 is characterized in that both sides of the belt-shaped outer casing in the conveying direction are folded back so as to cover both ends in the longitudinal direction of the absorbent body, and After fixing both end portions in the longitudinal direction of the absorbent body, the outer casing and the absorbent body are folded in a direction orthogonal to the conveying direction of the outer casing. The apparatus for manufacturing a pants-type disposable diaper according to claim 17, wherein the above-described laser-type splicing device comprises: a hollow cylindrical roller rotatably driven; and an illuminating head disposed in a hollow portion of the cylindrical roller And the cylindrical support member that forms the circumferential surface of the cylindrical roller is irradiated with the laser light.