JP2001224627A - Waist gather forming apparatus for paper diaper production equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waist gather forming apparatus in paper diaper production equipment which achieves a higher productivity and a higher reliability with the minimization of troubles. SOLUTION: This apparatus is constituted of a rotary cutter 30 to cut off a film 4S for a gather long in a strip and stretchable across the width thereof to a specified dimension, an enlarging/sticking unit 40 which sucks the cut stretching film piece 4 to be enlarged across the width thereof and moves it to a sticking position on a rear sheet 2S to be stuck thereon, an adhesive application part 20 which applies an adhesive 5 on the rear sheet 2S delivered from a material sheet roll 2R at a position of sticking the stretching film piece 4 and a feed roll 10 with which the rear sheet 2S coated with the adhesive 5 is wound to be sent to the subsequent process while being subjected to the pressure welding of the stretching film piece 4 enlarged across the width thereof by the enlarging/sticking unit 40 and moved to the sticking position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming waist gathers in a diaper manufacturing facility. The disposable diaper has a common basic structure for both children and adults, and has a three-layer structure in which a known absorbent material is interposed between a nonwoven fabric top sheet and a synthetic resin film backsheet. The shape is an hourglass, with a narrow center and wide ends.
At both ends of the paper diaper, a tape for stopping the front and rear ends when a person wears the paper diaper, and a waist gather for lightly tightening the abdomen are formed. The basic structure of this waist gather is that an elongated film with elasticity is attached between the top sheet and the back sheet, and due to the elasticity of the film, both ends of the paper diaper are constantly drawn toward the center in the width direction. Is slightly stretched when worn, to fit the human body. The present invention relates to an apparatus for sticking a stretchable and elongated film constituting such a waist gather to a back sheet.

[0002]

2. Description of the Related Art There are various types of conventional waist gather forming apparatuses. In each of them, a means for cutting a gather film and stretching it in the width direction and a means for attaching the film to a predetermined position on a back sheet are separately provided. It is an independent configuration. In addition, as a stretching means, both ends of the gathering film are stretched while being supported by being sandwiched by a clamper, and a plurality of needles are pierced at both ends of the gathering film and stretched while being supported. There is a method.

[0003]

In each of the conventional examples,
The operations of cutting, stretching and sticking the film were wasteful, and the production capacity was poor. For example, even the highest production capacity in the past in the past is up to about 250 sheets per minute. Further, in the conventional apparatus of the type in which the gathering film is stretched using the holding device, there is a problem that both ends of the gathering film are bent and defective products frequently occur. Further, in the conventional apparatus of the type in which the gather film is stretched using the needle, the tip of the needle is quickly worn away, so that it is not possible to pierce the gather film, which causes a problem.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a waist gather forming apparatus in a paper diaper manufacturing facility which has a higher production capacity, is less likely to cause a failure, and has high reliability.

[0005]

According to a first aspect of the present invention, there is provided a waist gather forming apparatus in a disposable diaper manufacturing facility for producing a disposable diaper in which an absorber is sandwiched between a top sheet and a back sheet. A device for attaching a stretchable film piece forming a waist gather, wherein a gather-like film sheet unwound from an original fabric roll wound around a gather-like film sheet having a band-like length and having a stretch in the width direction is provided. A rotary cutter that cuts to dimensions, stretches the stretchable film pieces cut by the rotary cutter, stretches in the width direction, moves to the position to be stuck to the back sheet, and stretches and sticks means for sticking; The stretchable film piece should be attached to the back sheet unwound from the wound raw roll. Adhesive application section to apply the adhesive in place, the back sheet coated with the adhesive in the adhesive application section is wound around and sent to the next process, and stretched in the width direction by the stretching and sticking means. And a feed roll for receiving pressure contact of the stretchable film piece moved to the sticking position. The waist gather forming apparatus in the paper diaper manufacturing facility according to claim 2 is the invention according to claim 1,
The stretching and sticking means includes two suction pieces for individually sucking both end portions of the stretchable film piece, a rotating means for supporting the suction piece and rotating from a suction position to a sticking position, and the two suction pieces. A rotating shaft, a pair of arms attached to the rotating shaft and extending in a radial direction, and the suction piece attached between the pair of arms. The expansion and contraction control means is fixedly arranged concentrically with the rotation shaft, and has a cylinder formed with two circumferential cam grooves on the outer peripheral surface. A cam and two cam followers each having a base end attached to the suction piece and a front end inserted into the cam groove, and the interval between the two cam grooves is narrow at the suction position and wide at the sticking position. Characterized by According to a third aspect of the present invention, there is provided the waist gather forming apparatus in the disposable diaper manufacturing facility according to the second aspect, wherein the suction piece has a suction hole formed on a suction surface, and the suction hole of the suction piece has a suction timing. The suction timing control means is connected to the negative pressure source while the suction piece rotates from the suction position to immediately before the sticking position. At the sticking position, the connection with the negative pressure source is controlled to be cut off. Claim 4
The waist gather forming device in the disposable diaper manufacturing equipment according to claim 2, wherein the pair of suction pieces are provided in two sets in the invention according to claim 2, and each set of suction pieces is a pair of suction pieces extending in a diameter direction from a rotation shaft. The arm is supported by two guide rods respectively attached to both ends of the arm.

According to the first aspect of the present invention, when the stretchable film piece cut by the rotary cutter is sucked by the stretching and sticking means, stretched in the width direction and moved to the sticking position,
A stretched stretchable film piece wound on a feed roll and stretched on a back sheet already coated with an adhesive can be stuck. In the present invention, since the work of stretching and sticking the stretchable film pieces can be performed by a single stretching and sticking means, the work can be continuously performed, and the productivity can be improved by continuously performing a series of work. According to the invention of claim 2,
When the two suction pieces supported by the rotating means are in the suction position, the distance between the two cam grooves of the expansion / contraction control means is small, so that the two ends of the stretchable film piece which is not stretched are sucked by two pieces. It can be absorbed with a piece. When the rotating shaft is rotated from this state to move the suction piece to the sticking position, the distance between the two suction pieces is increased as the cam follower attached to the suction piece slides in the two cam grooves. . For this reason, the elastic film piece whose both ends are sucked by the two suction pieces is extended in the width direction. In this state, since the stretchable film piece is pressed onto the back sheet wound around the feed roller, the stretchable film piece is attached to a predetermined position on the back sheet. As described above, according to the present invention, by rotating the suction piece, stretching of the stretchable film piece and transfer from the suction position to the sticking position can be performed, and furthermore, the operation of rotating the dynamic inertia without fluctuation is used. Therefore, continuous work is possible and productivity is greatly improved. According to the invention of claim 3, since the stretchable film piece is securely held by the suction of air, the stretchable film piece can be stretched and the transfer from the suction position to the sticking position can be performed without any trouble. Then, the suction piece is disconnected from the negative pressure source by the suction timing control means, so that the stretchable film piece can be securely attached to the back sheet by the adhesive. According to the invention of claim 4,
While there are two sets of suction pieces, one set can hold the stretchable film pieces while another set can hold the stretchable film pieces. For this reason, work efficiency is increased.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of a waist gather forming apparatus in the disposable diaper manufacturing facility of the present embodiment. As shown in the figure, a waist gather forming device (hereinafter simply referred to as a waist gather forming device) in the paper diaper manufacturing facility of the present embodiment is a paper in which an absorber 3 is sandwiched between a top sheet 1S and a back sheet 2S. This is a device for attaching a stretchable film piece 4 forming a waist gather to the back sheet 2S in a diaper manufacturing facility.

Reference numeral 1R denotes an original roll on which a top sheet 1S such as a nonwoven fabric is wound. Reference numeral 2R denotes an original roll on which a back sheet 2S such as a synthetic resin film is wound. Reference numeral 3 indicates a known absorber, which is a polymer product having high water absorption. This absorber 3
Are sequentially transported onto the back sheet 2S by the transport conveyor m.

Reference numeral 4R denotes a film sheet 4 for gathers.
This is a material roll on which S is wound. When the gather film sheet 4S fed from the material roll 4R is cut, the stretch film piece 4 having elasticity forming a waist gather of the diaper is formed. In addition, as a suitable material for the film sheet for gathers 4S, for example, a PU film (a film made of polyurethane) manufactured by Sumitomo 3M Limited, a urethane foam film manufactured by Bridgestone Corporation, and the like can be listed. These are merely examples, and various materials can be selected as long as they are stretchable film sheets that form waist gathers.

The waist gather forming apparatus according to the present embodiment includes a feed roll 10, an adhesive applying section 20 (not shown), a rotary cutter 30, and a stretching and pasting unit 40.
It is composed of

First, the feed roll 10 will be described. A feed roll 10 is provided above the raw roll 2R so as to be rotatable around a horizontal rotation axis. The raw roll 2R
The back sheet 2 </ b> S drawn out from is wound around the feed roll 10. Feed roll 1 from raw roll 2R
The back sheet 2S up to 0 runs vertically upward. The back sheet 2S in front of the feed roll 10 travels horizontally and is sent out to the next step, for example, a press roll unit or a die cutter unit. In other words, the back roll 2S fed from the raw roll 2R can be sent to the next process by the feed roll 10.

A transport conveyor m is provided at substantially the same height as the back sheet 2S traveling horizontally, and the absorber 3 is used to transfer the absorber 3 to the upper surface of the back sheet 2S traveling horizontally. Is available.

Next, the adhesive application section 20 will be described. An adhesive application section 20 is provided near the back sheet 2S that runs vertically between the material roll 2R and the feed roll 10. The adhesive application section 20 is provided on the back sheet 2S.
At the position where the elastic film piece 4 should be attached,
This is a section for applying the adhesive 5. As the adhesive 5, for example, hot melt or the like is suitable. By applying the adhesive 5 to the running back sheet 2S at predetermined time intervals by the adhesive applying section 20, the adhesive 5 can be continuously applied to the back sheet 2S at intervals.

Next, the rotary cutter 30 will be described. FIG. 2 is an enlarged perspective view of the rotary cutter 30 and the stretching and sticking unit 40. As shown in FIGS. 1 and 2, a suction roll 31 is rotatably provided in front of the raw roll 4R around a horizontal rotation axis. A suction hole 31h is formed in the peripheral surface of the suction roll 31. The suction hole 31h is connected to a negative pressure source 42, and the negative pressure source 42 can generate a negative pressure in the suction hole 31h. As the negative pressure source 42, a ring blower, a multi-stage turbo blower, a high-pressure plate fan, a vacuum pump, or the like is preferable.

Above the suction roll 31, a cutter roll 32 is rotatably provided. The cutter roll 32 has a cutter blade on the peripheral surface of the roll. Between the suction roll 31 and the cutter roll 32, a gather film sheet 4S fed from the raw roll 4R is sent.

For this reason, the suction roll 31 and the cutter roll 32 are rotated to cut the gather film sheet 4S between the roll peripheral surface of the suction roll 31 and the cutter blade of the cutter roll 32. is there. If the rotation speed of the cutter roll 32 is adjusted in accordance with the traveling speed of the gather film sheet 4S, the gather film sheet 4S can have a predetermined size, for example, 40 to 2
It can be cut into about 00 mm to form the elastic film piece 4. Moreover, since a negative pressure can be generated in the suction hole 31h of the suction roll 31, the cut elastic film piece 4 does not fall and the suction hole 31h of the suction roll 31 does not fall.
It is adsorbed on the surface. Note that the length of the short side of the elastic film piece 4 may be set according to the use of the baby diaper, the adult diaper, or the like.

Next, the stretching attaching unit 40 will be described. As shown in FIG.
Are the suction piece 41, the rotating unit 50, and the scaling control unit 60.
It is composed of

First, the scaling control unit 60 will be described. Figure 1
As shown in FIG. 2, a cylindrical cam 61 is fixed to the machine frame in a horizontal state between the suction roll 31 and the back sheet 2S running vertically upward. This cylindrical cam 6
A pair of left and right cam grooves 61g, 61g are formed on the peripheral surface of one roll. The distance between the pair of cam grooves 61g, 61g is narrow at a position close to the suction roll 31, and conversely, wide at a position close to the back sheet 2S. The tip of a rod-shaped cam follower 62 is fitted into each cam groove 61g, and the details will be described later.

Next, the rotating section 50 will be described. A through-hole (not shown) is formed in the center of the fixed cylindrical cam 61, and a rotating shaft 51 is inserted into the through-hole and is rotatably mounted. A pair of arms 52, 52 extending in the radial direction of the rotating shaft 51 are attached to the rotating shaft 51 at the intermediate portions outside the both ends of the cylindrical cam 61. This pair of arms 52, 52
A pair of guide rods 53, 53 are attached between the end portions in parallel with the rotation shaft 51.

Next, the suction piece 41 will be described. Two suction pieces 41 are slidably attached to each guide rod 53. For this reason, each suction piece 41 can move along the axial direction of the guide rod 53. A cam follower 62 is attached to each suction piece 41 toward the peripheral surface of the cylindrical cam 61.
As described above, the tip of the cam follower 62 is fitted into the cam groove 61g of the cylindrical cam 61. A suction hole 41h is formed on the outer surface of each suction piece 41.
The cam follower 62 may be provided with a bearing at the tip.

The rotating shaft 51 of the rotating unit 50 is rotated by a drive motor (not shown). Then, each suction piece 41 moves along the cylindrical cam 61 together with the cam follower 62. For this reason, when the suction piece 41 comes closest to the suction roll 31, the interval between the two suction pieces 41, 41 is narrow, and the suction piece 41 is moved to the back sheet 2S.
, The space between the two suction pieces 41, 41 becomes wider. The position at which the suction piece 41 comes closest to the suction roll 31 is indicated by a suction position 71, and the position at which the suction piece 41 comes closest to the back sheet 2S is a sticking position 72.
Indicated by.

The suction holes 41h of the suction pieces 41 are connected to the negative pressure source 42 via a known suction timing section. By the suction timing portion, the suction hole 41h is connected to the negative pressure source 42 while the suction piece 41 rotates from the suction position 71 to immediately before the sticking position 72. At the sticking position 72, the suction hole 41h and the negative pressure source 42 are connected. Is controlled to disconnect.

For this reason, the 2 supported by the rotating portion 50
When the suction pieces 41, 41 are at the suction position 71, since the interval between the two cam grooves 61g, 61g of the enlargement / reduction control unit 60 is narrow, the two ends of the stretchable film piece 4 in the unstretched state are separated by two. Can be sucked by the suction pieces 41, 41. From this state, the rotating shaft 51 is rotated to move the suction piece 41 to the sticking position 72, and as the two cam followers 62 slide in the two cam grooves 61g, 61g, each suction piece 4 is moved.
Since 1 moves along the guide rod 53, the space between the two suction pieces 41, 41 becomes wider. Therefore, 2
The elastic film pieces 4 whose both ends are sucked by the suction holes 41h, 41h of the suction pieces 41, 41 are extended in the longitudinal direction.

Then, at the sticking position 72, the elastic film piece 4 in the state is
Since the elastic film piece 4 is pressed onto the adhesive 5 on S, the elastic film piece 4 is attached to a predetermined position on the back sheet 2S.

As described above, according to the stretching and sticking unit 40, by rotating the suction piece 41, the stretchable film piece 4 is stretched and the sticking position 7 is shifted from the sucking position 71 to the sticking position 7.
2 can be transferred, and the operation using the rotational motion, which does not fluctuate the dynamic inertia, is used.
This has the effect of significantly improving productivity.

Next, the operation and effect of the waist gather forming apparatus of this embodiment will be described. FIG. 3 is a flowchart of the waist gather forming apparatus of the present embodiment. FIG.
As shown in (1) to (3), first, the adhesive 5 is continuously applied on the back sheet 2S unwound from the material roll 2R by the adhesive applying section 20 at intervals (20P).
.

On the other hand, the gather film sheet 4S unwound from the raw roll 4R is
It is cut by 0 (30P) to form a stretchable film piece 4. The stretchable film piece 4 is sucked into the suction hole 31h of the suction roll 31. By the rotation of the suction roll 31,
The stretchable film piece 4 is sent between the rotary cutter 30 and the stretching and sticking unit 40, that is, to the suction position 71.

At the suction position 71, a negative pressure is generated in the suction hole 41h of the suction piece 41 by a suction timing unit (not shown). Therefore, the stretchable film piece 4 is transferred from the suction hole 31h of the suction roll 31 to the suction holes 41h of the two suction pieces 41. With the rotation of the rotating shaft 51 of the rotating unit 50, each suction piece 41 moves along with the cam follower 62 along the cylindrical cam 61. For this reason, each suction piece 41 moves along the guide rod 53, and the interval between the two suction pieces 41, 41 increases. When the stretchable film piece 4 is sent to the sticking position 72, the stretchable film piece 4 is
Since the distance between the suction pieces 41, 41 is increased, the stretchable film piece 4 is stretched by being pulled in the longitudinal direction.

Therefore, the work of stretching and sticking the stretchable film piece 4 is performed by one stretching sticking unit 4.
Since the number of operations can be reduced to 0, there is an effect that productivity can be improved by performing a series of operations continuously without taking over the operations.

Further, since the stretchable film piece 4 is securely held by the suction of air, the stretchable film piece 4 can be stretched or moved from the suction position 71 to the sticking position 72 without any trouble. At 72, the suction timing control unit disconnects the suction piece 41 from the negative pressure source 42, so that the adhesive 5 can reliably adhere the stretchable film piece 4 to the back sheet 2S. .

Further, there are two sets of suction pieces 41,
While one set of elastic film pieces 4 is being adsorbed, another set of elastic film pieces 4 can be attached. For this reason, the effect that work efficiency becomes high is produced.

The two suction pieces 41, 41
The stretchable film piece 4 supported by the adhesive is adhered to the adhesive 5 of the back sheet 2S while being stretched (50).
P).

Then, the stretchable film piece 4 is fed by the feed roll 10 together with the back sheet 2S, and the absorber 3 is transferred by the transport conveyor m onto the back sheet 2S ahead of the feed roll 10 ( 60P). Then
The back sheet 2S is fed by the feed roll 10, and while the elastic film pieces 4, the adhesive 5, and the absorber 3 are placed on the back sheet 2S, these are sandwiched between the back sheet 2S and the top sheet 1S, It is sent to the next process, such as a press roll unit and a die cutter unit (70P).

FIG. 4 is a disposable diaper A having a waist gather formed by the waist gather forming apparatus of the present embodiment.
It is a schematic perspective view of. As shown in FIG.
S, the back sheet 2S, and the stretchable film piece 4 are cut at the middle position of the stretchable film piece 4 along the width direction. Cut elastic film piece 4
Form waist gathers at both ends of the disposable diaper A. In addition, the waist gather forming apparatus in the disposable diaper manufacturing equipment of the present embodiment has a production capacity of 500 to 800 sheets per minute, and in view of the production capacity of the conventional apparatus being at most 250 sheets per minute, the production is dramatically increased. It is clear that the abilities are improving. As described above, according to the waist gather forming apparatus of the present embodiment, there is an effect that the production capacity is higher, a failure hardly occurs, and the reliability is high.

[0035]

According to the first aspect of the present invention, when the stretchable film piece cut by the rotary cutter is sucked by the stretching and sticking means and stretched in the width direction and transferred to the sticking position, the stretchable film piece is wound around the feed roll, A stretched stretch film piece can be stuck on the back sheet to which the adhesive has already been applied. In the present invention, since the work of stretching and sticking the stretchable film pieces can be performed by a single stretching and sticking means, the work can be continuously performed, and the productivity can be improved by continuously performing a series of work. According to the second aspect of the present invention, when the two suction pieces supported by the rotating means are at the suction position, the interval between the two cam grooves of the expansion / contraction control means is narrow, so that the stretchability in the non-extended state. Both ends of the film piece can be sucked by two suction pieces. When the rotating shaft is rotated from this state to move the suction piece to the sticking position, the distance between the two suction pieces is increased as the cam follower attached to the suction piece slides in the two cam grooves. . For this reason, the elastic film piece whose both ends are sucked by the two suction pieces is extended in the width direction. In this state, since the stretchable film piece is pressed onto the back sheet wound around the feed roller, the stretchable film piece is attached to a predetermined position on the back sheet. Thus, according to the present invention, by rotating the suction piece,
Stretching of the stretchable film piece and transfer from the suction position to the sticking position can be performed, and the rotation operation, which does not fluctuate the dynamic inertia, is used, so that continuous work is possible and productivity is greatly improved. According to the invention of claim 3, since the stretchable film piece is securely held by the suction of air, the stretchable film piece can be stretched and the transfer from the suction position to the sticking position can be performed without any trouble. Then, the suction piece is disconnected from the negative pressure source by the suction timing control means, so that the stretchable film piece can be securely attached to the back sheet by the adhesive. According to the fourth aspect of the present invention, there are two sets of suction pieces, and while one set sucks the stretchable film pieces, the other set can stretch the stretchable film pieces. For this reason, work efficiency is increased.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a waist gather forming apparatus in a disposable diaper manufacturing facility of the present embodiment.

FIG. 2 is an enlarged perspective view of a rotary cutter 30 and a stretching sticking unit 40.

FIG. 3 is a flowchart of the waist gather forming apparatus of the present embodiment.

FIG. 4 is a schematic perspective view of the paper diaper A on which waist gathers are formed by the waist gather forming apparatus of the present embodiment.

[Explanation of symbols]

 Reference Signs List 1S Top sheet 2S Back sheet 3 Absorber 4S Gathering film sheet 4 Elastic film piece 10 Feed roll 20 Adhesive application part 30 Rotary cutter 32 Cutter roll 40 Stretching and sticking unit 41 Suction piece 41h Suction hole 42 Negative pressure source 50 Rotation Part 51 Rotating shaft 52 Arm 53 Guide rod 60 Expansion / contraction controller 61 Cylindrical cam 61 g Cam groove 62 Cam follower 71 Suction position 72 Adhering position A Paper diaper

[Procedure amendment]

[Submission date] April 11, 2000 (2004.1.
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010] waist gather forming apparatus of this embodiment, feed rolls 10, adhesives coating unit 20, in which is composed of a rotary cutter 30 and draw sticking unit 40.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction contents]

[0024] Then, in the attaching position 72, if enlarger
In this state, the stretchable film piece 4 is pressed onto the adhesive 5 on the back sheet 2S running vertically upward, so that the stretchable film piece 4 is attached to a predetermined position on the back sheet 2S.

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 4]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

Claims (4)

[Claims] 1. An apparatus for manufacturing a disposable diaper in which an absorber is sandwiched between a top sheet and a back sheet, wherein the apparatus is configured to attach a stretchable film piece forming a waist gather to the back sheet. A rotary cutter for cutting a film film for a gather drawn out from a raw roll wound around a film film for a gather having a lengthy stretchable width in a width direction, and a stretchable film piece cut by the rotary cutter. The stretchable film piece is attached to a stretching and sticking unit that sucks and stretches in the width direction, moves to the sticking position to the back sheet, and sticks, and a back sheet that is unwound from a raw roll that has wound up the back sheet. An adhesive application section for applying an adhesive at a position where the adhesive should be applied, and a back surface on which the adhesive is applied at the adhesive application section And a feed roll which receives the stretched film piece which has been stretched in the width direction by the stretching and sticking means and moved to the sticking position. Waist gathering equipment in diaper manufacturing equipment. 2. The stretching and sticking means includes two suction pieces for individually sucking both ends of the stretchable film piece, and a rotating means for supporting the suction piece and rotating the suction piece from a suction position to a sticking position; The rotating means comprises a rotating shaft, a pair of arms attached to the rotating shaft and extending in a radial direction, and a rotating shaft extending between the pair of arms. And a guide rod slidably supporting the suction piece. The expansion / contraction control means is fixedly arranged concentrically with the rotating shaft, and has two circumferentially extending cam grooves on its outer peripheral surface. Are formed, and two cam followers each having a base end attached to the suction piece and a tip inserted into the cam groove,
2. A waist gather forming apparatus in a disposable diaper manufacturing facility according to claim 1, wherein the interval between the two cam grooves is narrow at the suction position and wide at the sticking position. 3. A suction hole is formed in a suction surface of the suction piece, and the suction hole of the suction piece is connected to a negative pressure source via suction timing control means for controlling suction timing. The suction timing control unit controls the suction piece to be connected to the negative pressure source while the suction piece rotates from the suction position to immediately before the sticking position, and to disconnect from the negative pressure source at the sticking position. Claim 2
A waist gather forming apparatus in the disposable diaper manufacturing facility according to the above. 4. A pair of suction pieces are provided in two sets, and each set of suction pieces is provided on two guide rods respectively attached to both ends of a pair of arms extending in a diameter direction from a rotation shaft. 3. The device according to claim 2, wherein the device is supported.
A waist gather forming apparatus in the disposable diaper manufacturing facility according to the above.