JP2001172802A - Method for producing disposable trunks-type shorts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for mass-producing at low cost within a unit time pieces of shorts directly disposable after used. SOLUTION: This method for producing a piece of disposable trunks-type shorts comprises the following processes: (a) the sheet faces each of inner sheets 2A, 2B are overlapped with each other; (b) each of the inner sheets 2A, 2B is connected each with a first connecting part B1 and second connecting part B2; (c) each of the inner sheets 2A, 2B is cut each along a first cutting line C1 and second cutting line C2; (d) the sheet faces each of the inner sheets 2A, 2B are overlapped with the sheet faces each of outer sheets 3A, 3B each attached with elastic members 5 in a stretched condition in the cross direction; (e) the inner sheets 2A, 2B and the outer sheets 3A, 3B are connected with a third connecting part B3; (f) each of the inner sheets 2A, 2B and each of the outer sheets 3A, 3B are cut along a third cutting line C3, fourth cutting line C4, and fifth cutting line C5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing trunks-type disposable pants.

[0002]

2. Description of the Related Art Pants such as trunks and briefs are manufactured through a cutting step of cutting a cloth for each part such as a front body and a back body, and a sewing step of sewing the cut cloth. The sewn pants are subjected to a finishing process such as pressing and heat setting, and are inspected to be finished products. Such pants are intended for repeated use.

[0003]

In recent years, there has been an increasing demand for disposable pants which are worn by doctors, nurses, patients and the like when performing surgery and examinations and which are discarded after use. Disposable pants are required to be mass-producible and inexpensive. However, in pants that assume repeated use,
Since a plurality of independent steps such as a cutting step, a sewing step, and a finishing step are required, improvement in productivity is limited. In addition, manufacturing costs are too high for disposables that are discarded after one use.

An object of the present invention is to provide a manufacturing method capable of mass-producing pants which can be discarded as they are after use at low cost and within a unit time.

[0005]

SUMMARY OF THE INVENTION A feature of the present invention in a method of manufacturing a trunks-type disposable pants for achieving the above object is as follows: (a) a pair of inner sides having both side edges extending longitudinally in parallel with each other; Each sheet is continuously fed forward in the longitudinal direction, and the dimension between the two side edges of the inner sheet is divided into two so that the first center lines extending in the longitudinal direction coincide with each other, and the sheet surfaces of the inner sheets are overlapped. (B) extending the sheet surface of each of the overlapping inner sheets in an arc so as to protrude to one of the front and rear sides in the longitudinal direction inside both side edges of the inner sheets, and A first joint having a top near the first center line and opposite ends opposite to the top, and both ends of the first joint located between the first joint and the side edges; Joining together a pair of second joining portions extending by a required dimension in the longitudinal direction along the first joining portion from the side, and (c) joining the sheet surfaces of the inner sheets to the inside of the first joining portion. Located in the vicinity of the first
A first cutting line extending along the joint and slightly longer than the extension of the first joint is connected to both ends of the first cutting line extending in the longitudinal direction beyond both ends of the first joint. Forming an opening surrounded by the cutting line on the sheet surface of each of the inner sheets, and (d) cutting both side edges extending in the longitudinal direction in parallel with each other. A pair of outer sheets having a plurality of outer sheets that are continuously supplied forward in the longitudinal direction, and an elastically stretchable member is attached in an extended state in the width direction of each of the outer sheets. A member is located at the opening in the vicinity of the second cutting line, and extends in the longitudinal direction by bisecting a dimension between a first center line of the inner sheet and both side edges of the outer sheet. (E) seating the inner sheet and the outer sheet so that the two inner surfaces coincide with each other so that the sheet surface of the overlapping inner sheet is sandwiched between the sheet surfaces of the outer sheets; And a sheet surface of the outer sheet extending parallel to the longitudinal direction so as to be located between the first joint portion and both side edges of the sheets so as to overlap with the second joint portion. Joining at a pair of third joints having a dimension exceeding the longitudinal direction of the top and both ends of the part and having a distance gradually reduced from both ends of the first joint toward the top of the first joint; (F) the inner sheet and the outer sheet are positioned between the third joint and both side edges of the sheets and have substantially the same dimensions as the third joint; A pair of third cutting lines extending parallel to the longitudinal direction along the joining portion, and extending between the elastic member and the second disconnection line in the width direction and connected to the third cutting line. Cutting at a fourth cutting line and a fifth cutting line located outside the top of the first joining portion in the longitudinal direction and extending in the width direction and connected to the third cutting line. is there.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a method for manufacturing a trunks-type disposable pants according to the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 are a perspective view of the disposable pants 1 manufactured by the manufacturing method according to the present invention and an exploded perspective view of the pants 1 of FIG. The pants 1 are composed of a pair of inner sheets 2A, 2B of the same shape and size, and a pair of outer sheets 3A, 3B of the same shape and size, a waist opening 6 at the upper part, and a pair of right and left legs at the lower part. And an opening 7. In the vicinity of the periphery of the waist opening 6, a film-like elastic elastic member 5 extending in the circumferential direction is attached in an extended state. In FIG. 1, the stretched state of the elastic member 5 is released, and a gather is formed along the waist of the pants 1.

In FIG. 2, the inner sheets 2A, 2B are arranged symmetrically with respect to each other, and the outer sheets 3A, 3B
Each is located outside the inner sheets 2A and 2B and arranged in plane symmetry with each other. Inner sheets 2A, 2B
The upper and lower ends 2a, which extend in the width direction in parallel with each other,
2b and front and rear side portions 2 extending in the longitudinal direction in parallel with each other
c, 2d. The inner sheets 2A and 2B have
A concave notch 4 is formed between the front and rear sides 2c and 2d of the seats 2A and 2B so as to project an arc from the upper end 2a to the lower end 2b. Inner sheet 2A,
The front side 2c of the 2B arcs from the upper end 2a to the lower end 2b so as to gradually approach the first center line Y1 extending in the longitudinal direction by bisecting the dimension between the front side 2c and the rear side 2d. Stretches out.

Each of the outer sheets 3A and 3B has upper and lower ends 3a and 3b extending in the width direction in parallel with each other, and front and rear sides 3c and 3d extending in the longitudinal direction in parallel with each other. The front side 3c of the outer seats 3A, 3B gradually divides the dimension between the front side 3c and the rear side 3d into two along a longitudinal center line Y2 extending from the upper end 3a to the lower end 3b. It extends in an arc so as to approach.
An elastic member 5 extending in the width direction along the upper end 3a of the outer sheets 3A, 3B is attached to the seat surfaces 3e facing each other of the outer sheets 3A, 3B in an extended state.

In order to form the pants 1 from the state shown in FIG.
The inner sheets 2A, 2B are overlapped so that the first center line Y1 is coincident with each other, and the front and rear side portions 2c, 2d located near the upper end 2a, the portions 2c1, 2d1 and the recessed portions 4 are formed.
The sheet surfaces 2e of the opposing inner sheets 2A and 2B are joined continuously or intermittently along the direction.

The seat surface 2e of the inner sheets 2A, 2B
After bonding the inner sheets 2A, 2B and the outer sheets 3A, 3B, the sheets 2A, 2B, 3
A, 3B are overlapped so that the first and second center lines Y1, Y2 coincide with each other, and the inner sheets 2A, 2B and the outer sheets 3A,
Along the front and rear side portions 2c, 2d, 3c, 3d with the 3B, the opposing seat surfaces 2f of the inner sheets 2A, 2B and the seat surfaces 3e of the outer sheets 3A, 3B are joined continuously or intermittently.

The pants 1 have front and rear side portions 2c, 2d in which the seat surface 2e of each of the inner sheets 2A, 2B is located near the upper end 2a of the inner sheets 2A, 2B.
Since they are joined along 2d1, the joining strength in the direction around the pants 1 can be improved.

FIG. 3 is a process chart showing an example of a method for manufacturing the pants 1 of FIG. 1, and (1) shows a side view of the process.
(2) shows a plan view of the process. In the pants 1, in a line having the first step (a) to the sixth step (f), a pair of continuous inner sheets 2 </ b> A, 2 </ b> B having both side edges E <b> 1 extending in the longitudinal direction in parallel with each other, and in parallel with each other. It is manufactured using a pair of continuous outer sheets 3A and 3B having both side edges E2 extending in the longitudinal direction.

The inner sheets 2A, 2B and the outer sheets 3A, 3B have the same dimensions in the width direction.
Inner seats 2A, 2B and outer seats 3A, 3B
In the first, the dimension between the side edges E1, E2 of the sheets 2A, 2B, 3A, 3B is divided into two to extend in the longitudinal direction.
The center line Y1 and the second center line Y2 are imagined. The sheets 2A, 2B, 3A,
The supply and movement of 3B are performed by a nip roll, a suction drum, and the like that are rotated by a driving device. The sheets 2A, 2B, 3A, 3B move through the respective steps at the same speed.

In the first step (a), the inner sheet 2A,
This is a step of continuously supplying each of the inner sheets 2B forward in the longitudinal direction and overlapping the sheet surfaces of the inner sheets 2A and 2B with each other.

In the first step (a), a pair of winding rolls 1
The inner sheets 2 </ b> A and 2 </ b> B wound around the sheet 01 are pulled out by a pair of nip rolls 102 disposed downstream of the winding rolls 101. Each of the inner sheets 2A and 2B enters between the nip rolls 102 rotating opposite to each other, and the sheet surfaces of the nip rolls 102 are overlapped on the peripheral surface of the nip roll 102 with the first center line Y1 being aligned.

The second step (b) is a step of joining the sheet surfaces of the overlapping inner sheets 2A and 2B.

Each of the overlapping inner sheets 2A and 2B enters the joining mechanism 103 installed in the second step (b), and the sheet surfaces are joined by the joining mechanism 103. The sheet surfaces of the inner sheets 2A, 2B extend substantially U-shaped inside the both side edges E1 of the inner sheets 2A, 2B.
The joint portion B1 is joined to a pair of second joint portions B2 which are located between the first joint portion B1 and both side edges E1 and extend substantially straight. The first joint portion B1 extends in an arc so as to protrude rearward in the longitudinal direction of the inner sheets 2A and 2B, and has a top B1a located near the first center line Y1 and both ends located on the opposite side of the top B1a. And a portion B1b. Second joint B
Reference numeral 2 is located near the outside of the first joint B1 and extends rearward in the longitudinal direction along the first joint B1 from near both ends B1b of the first joint B1. The dimension of the second joint B2 is preferably in the range of 1/3 to 1/5 of the dimension of the first center line Y1 extending between the top B1a and both ends B1b of the first joint B1.

In the third step (c), the inner sheet 2A,
In this step, the sheet surface of 2B is cut out to form the opening 11 in the sheet surface.

The inner sheets 2A and 2B enter the cutting mechanism 104 installed in the third step (c), and the cutting mechanism 104 cuts off the sheet surface portion 10 of the inner sheets 2A and 2B. The sheet surfaces of the inner sheets 2A and 2B are close to the inside of the first joint B1 in the first joint B.
The first cutting line C1 extending in a substantially U-shape along 1 and a second cutting line C2 connected to both end portions C1a of the first cutting line C1 and extending in the width direction are cut. The first cutting line C1 is
Both ends C1a of the first cutting line C1 are slightly longer than the extending dimension of the joint B1, and both ends B1a of the first joint B1
It is located longitudinally forward. Inner sheet 2
Openings 11 surrounded by the cutting lines C1 and C2 are formed on the sheet surfaces of A and 2B.

In the fourth step (d), the outer sheet 3A,
3B are continuously supplied to the front in the longitudinal direction, and the elastic stretchable members 5 that have been stretched to the required magnification are connected to the outer sheets 3A and 3B.
Of the inner sheets 2A, 2B and the outer sheets 3A, 3B.
This is a step of overlapping the sheet surfaces.

In the fourth step (d), an adhesive application mechanism 106 for applying an adhesive to the elastic member 5 and the outer sheet 3A with the elastic member 5 extended while the elastic member 5 is extended to a required magnification. A transfer mechanism 107 to be joined to 3B is provided. The continuous elastic member 5 wound up by the pair of winding rolls 105 is pulled out by the transfer mechanism 107, and is supplied with an adhesive (by an adhesive application mechanism 106 disposed between the winding roll 105 and the transfer mechanism 107). (Not shown)
Is applied intermittently. Elastic member 5 coated with adhesive
Enters the transfer mechanism 107, and the elastic member 5
The film is stretched to a required magnification by a stretching means (not shown) provided at 07. Thereafter, the elastic member 5 is cut into a predetermined size by a cutter in the longitudinal direction from the tip. Each of the cut and segmented elastic members 5 is inverted by about 90 ° so as to be orthogonal to the moving direction of the elastic members 5, and is held on the suction surface of the suction drum 108 in an extended state.

Each of the outer sheets 3A and 3B wound on the pair of winding rolls 109 is pulled out by a pair of nip rolls 110 which rotate while facing the suction drum 108. The elastic member 5 that moves on the peripheral surface of the suction drum 108 and the outer sheets 3A and 3B that move on the peripheral surface of the nip roll 110 overlap on the contact surface between the suction drum 108 and the nip roll 110, and the elastic member 5 separates the outer sheet 3A. , 3B in an extended state in the width direction of the facing sheet surfaces via an adhesive.

The outer sheets 3A, 3B moving on the peripheral surface of the nip roll 110, which is joined to the elastic member 5 and rotates opposite to each other, and the inner sheets 2A, 2B moved to the fourth step (d) are connected to each other by the nip rolls 110. The contact surfaces of the inner sheets 2A, 2B overlap with the sheet surfaces of the outer sheets 3A, 3B being sandwiched between the respective sheet surfaces.

In the fourth step, the elastic member 5 is disposed in the opening 11 formed in the sheet surfaces of the inner sheets 2A, 2B in the vicinity of the second cutting line C2 extending in the width direction of the inner sheets 2A, 2B. , The first center line Y1 of the inner sheets 2A, 2B and the outer sheets 3A, 3
The sheets 2A, 2B, 3A, and 3B overlap with the second center line Y2 of B being aligned.

In the fifth step (e), the inner sheet 2A,
This is a step of joining the sheet surface of 2B and the sheet surfaces of the outer sheets 3A and 3B.

The overlapping inner sheets 2A, 2B and outer sheets 3A, 3B enter the joining mechanism 111 installed in the fifth step (e), and the joining mechanism 111 causes the sheet surfaces of the inner sheets 2A, 2B and the outer sheet to enter. The sheet surfaces 3A and 3B are joined. The seat surfaces of the inner sheets 2A, 2B and the outer sheets 3A, 3B are located between the first joints B1 of the inner sheets 2A, 2B and both side edges E1, E2 of the sheets 2A, 2B, 3A, 3B. And joined by a pair of third joining portions B3 extending in parallel with each other in the longitudinal direction. The third joining portion B3 is
It extends in parallel in the longitudinal direction over the joint B2, crosses the top B1a of the first joint B1 rearward in the longitudinal direction, and has a dimension exceeding both ends B1b of the first joint B1 forward in the longitudinal direction. One of the third joints B3 extends in an arc so as to gradually approach the second center line Y2 from both ends B1b of the first joint B1 toward the top B1a. The joining mechanism 111 of the fifth step (e) includes the elastic member 5
There is provided a suction means (not shown) for maintaining the extended state.

In the sixth step (f), the inner sheets 2A, 2B having the sheet surfaces joined and the outer sheets 3A, 3B
This is the step of cutting.

The inner sheets 2A, 2B and the outer sheets 3A, 3B enter the cutting mechanism 112 installed in the sixth step (f), and the inner sheets 2A, 2B and the outer sheets 3A, 3B are formed by the cutting mechanism 112. Is cut into the contour shape of the trunks. Inner sheet 2A, 2
B and the outer sheets 3A, 3B are connected to a third joint B3 and both side edges E1, E of the sheets 2A, 2B, 3A, 3B.
2 and a pair of third cutting lines C3 extending in the longitudinal direction in parallel with each other, and a fourth cutting line C4 extending in the width direction between the elastic member 5 and the second disconnection line C2. And the first
The joint B1 is cut by a fifth cutting line C5 that is located behind the top B1a in the longitudinal direction and extends in the width direction.

The third cutting line C3 has substantially the same dimensions as the third joint B3, and extends along the third joint B3 near the outside of the third joint B3. The fourth cutting line C4 and the fifth cutting line C5 are connected to each of the third cutting lines C3. The cutting mechanism 112 in the sixth step (f) includes the elastic member 5
There is provided a suction means (not shown) for maintaining the extended state.

The joining mechanisms 103 and 111 installed in the second step (b) and the fifth step (e) are either hot-melt adhesives or heat-sealing techniques such as heat sealing or sonic sealing. Can join the sheet surfaces of the sheets. The cutting mechanisms 104 and 112 installed in the third step (c) and the sixth step (f) may cut the sheet using a cutting die or a cutting technique such as a laser beam or ultrasonic wave. it can.

In this line, an optical sensor formed of a light projecting unit and a light receiving unit, a rotational speed sensor for measuring the rotational speed of the roll, a control device connected to these sensors, and a control device connected to the control device Using the driving device, the sheets 2A, 2B, 3 in the first step (a) to the sixth step (f) are used.
Positioning when superimposing A and 3B, sheet 2
A, 2B, 3A, 3B and the supply speed of the elastic member 5 are controlled. A program for realizing an optimal operation environment of the line is stored in the memory of the control device.

For the inner sheets 2A, 2B and the outer sheets 3A, 3B, it is preferable to use a non-woven fabric formed of thermoplastic fibers. As the non-woven fabric, a non-woven fabric having improved moisture permeability by forming openings and a non-woven fabric having improved cushioning properties by forming irregularities on the sheet surface of the non-woven fabric can be used. Inner sheet 2 in contact with the inseam of the wearer
A and 2B are made of materials with excellent liquid absorption, moisture permeability and flexibility,
For example, it is preferable to use a nonwoven fabric containing fibers such as rayon and cotton.

Also, a composite nonwoven fabric (SMS nonwoven fabric) in which both sides of a meltblown nonwoven fabric having high water resistance are sandwiched between spunbonded nonwoven fabrics having high strength and high flexibility.
Can also be used. The SMS nonwoven fabric is manufactured by sandwiching the meltblown nonwoven fabric with the spunbonded nonwoven fabric and then bonding the meltblown nonwoven fabric and the spunbonded nonwoven fabric to each other by using a pressing technique. By using the SMS nonwoven fabric, the pants 1 having high strength and high water resistance and having good touch can be manufactured.

As the elastic member 5, a synthetic rubber, a natural rubber, a stretch film containing a synthetic rubber, a spunbonded nonwoven fabric or a meltblown nonwoven fabric containing a synthetic rubber as a main component can be used. It is also possible to use a composite member in which an elastic member is joined to a nonwoven fabric in an extended state, or a composite member in which an elastic member is joined to a nonwoven fabric while being extended and covered with a nonwoven fabric.

[0036]

According to the method for manufacturing a trunks-type disposable pants according to the present invention, a pair of continuous inner sheets and a pair of continuous outer sheets are merely overlapped with each other, joined, and cut. Compared with pants manufactured through a plurality of processes such as a cutting process and a sewing process, the pants can be manufactured cheaply and easily, and are optimal as disposable pants that do not reuse. In addition, since pants can be produced in an automated and continuous process, productivity per unit time is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a trunks-type disposable pants.

FIG. 2 is an exploded perspective view of the pants in FIG.

FIG. 3 is a manufacturing process diagram of the pants in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Trunks type disposable pants 2A, 2B Inner sheet 3A, 3B Outer sheet 5 Elastic elastic member 11 Opening part B1 First joining line B1a Top B1b Both ends B2 Second joining line B3 Third joining line C1 First cutting line C1a Both ends C2 Second cutting line C3 Third cutting line C4 Fourth cutting line C5 Fifth cutting line E1 Both side edges E2 Both side edges Y1 First center line Y2 Second center line

Claims (1)

[Claims] 1. A method of manufacturing a trunks-type disposable pants, comprising: (a) continuously supplying a pair of inner sheets each having both side edges extending in parallel in the longitudinal direction to the front in the longitudinal direction; (B) overlapping the sheet surfaces of the inner sheets with the first center line extending in the longitudinal direction being matched by dividing the dimension between both side edges of the sheets into two, and (b) overlapping the sheet surfaces of the inner sheets with each other. Inside the both sides of the inner sheet, it extends in an arc so as to protrude to one of the front and the rear in the longitudinal direction, and has a top near the first center line and both ends on the opposite side to the top. And a required dimension in the longitudinal direction along the first joint from near both ends of the first joint located between the first joint and the side edges. A step of bonding between the second joint portions of the pair extending only, the (c) said inner sheet each sheet surface, the first
A first cutting line located near the inside of the joint and extending along the first joint and slightly longer than the length of the first joint; and both ends of the first joint in the longitudinal direction. (D) cutting with a second cutting line connected to both ends of the first cutting line extending in the width direction and forming an opening portion surrounded by the cutting lines on each sheet surface of the inner sheet. A) supplying a pair of outer sheets each having both side edges extending in the longitudinal direction in parallel with each other continuously in the longitudinal direction forward, and attaching an elastic elastic member in the width direction of each of the outer sheets in an extended state; While maintaining the stretched state of the elastic member, the elastic member is positioned at the opening in the vicinity of the second cutting line, and a position between the first center line of the inner sheet and both side edges of the outer sheet. The dimensions are divided into two, the second center line extending in the longitudinal direction is matched, and the sheet surface of the inner sheet that overlaps is sandwiched between the sheet surfaces of the outer sheets,
Superposing the inner sheet and the outer sheet; (e) positioning the sheet surface of the inner sheet and the sheet surface of the outer sheet between the first joint portion and both side edges of the sheets; The first joint has a dimension extending in the longitudinal direction so as to overlap the second joint and extending beyond the top and both ends in the longitudinal direction of the first joint.
A step of joining at a pair of third joints whose distance from each other gradually decreases from both ends of the joint toward the top, (f) connecting the inner sheet and the outer sheet with the third joint, A pair of third cutting lines located between both side edges of the sheets and having substantially the same size as the third joint and extending in parallel with the longitudinal direction along the third joint; A fourth cutting line extending between the elastic member and the second cutting line and extending in the width direction and leading to the third cutting line, and a fourth cutting line located outside the top of the first joining portion in the longitudinal direction. Cutting along a fifth cutting line extending in the width direction and connecting to the third cutting line.