JPH09295754A - Feeder for elastic member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable rocking movement of an elastic member due to rotation of a mother roll with a structure in which the mother roll and guide rolls are prevented from moving in their axial directions, and providing an open end side of a guide groove with a slope surface for causing the elastic member which is fed in a straight line to slide in. SOLUTION: A guide groove 13 formed over the cylindrical surface 4a of each of guide rolls 4 conforms with a feed groove 7 at a contact portion of a mother roll 5. An open end of the guide groove 13 is provided with a slope surface 15 so that an elastic member supplied in a straight line is caused to slide into the guide groove 13 by the rotation of the guide rolls 4. The elastic member which slides into the guide groove 13 is fed to a feed groove 7 formed on the cylindrical surface 5a of the mother roll 5. In this way, since the curved guide grooves 13 and the feed grooves 7 are formed on the guide rolls 4 and the mother roll 5, and the elastic member is rocked by the rotation of the mother roll 5, the elastic member may be fed at a high speed to a diaper web.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supplying an elastic member, which is useful for supplying and arranging an elastic member in the area around the legs when manufacturing, for example, a disposable diaper.

[0002]

2. Description of the Related Art For example, in a disposable diaper having a so-called underbody gather structure in which an elastic member such as a rubber cord is provided in the underfoot portion of the disposable diaper, the disposable diaper is mounted. In order to fit the inferior part and enhance the wearing feeling when doing,
The elastic member is provided along the curved shape of the foot portion.

In order to provide the elastic member along the shape of the leg portion, the elastic member is supplied to the continuously supplied disposable diapers while the entire supplying means for supplying the elastic member is swung. I am trying.

However, if the elastic member is supplied to the diaper while swinging the entire supply means, the supply speed of the elastic member is slow and the productivity is poor. In addition, in order to swing the entire supply means, a complicated swing mechanism is required, which complicates the device configuration.

Therefore, an object of the present invention is to provide an elastic member supply device which is capable of supplying and arranging an elastic member at a predetermined position of a sheet in a curved shape at a high speed, which is excellent in productivity and has a simplified device structure. To do.

[0006]

According to the first aspect of the present invention,
In an elastic member supply device in which an elastic member is oscillated and arranged in a predetermined curved shape at a predetermined position of a sheet that is continuously supplied, a curved supply groove is provided on a roll peripheral surface. Corresponding to the mother roll that has the elastic member supplied to the supply groove and is arranged to supply at a predetermined position of the sheet that is continuously supplied by rocking the elastic member, and the supply groove of the mother roll. And a guide roll having a curved guide groove on the roll peripheral surface for guiding the elastic member in the supply groove, both the mother roll and the guide roll moving in the axial direction. An elastic member supply device, characterized in that it is a fixed roll, and an inclined surface is provided on the open end side of the guide groove for sliding the elastic member supplied linearly into the guide groove. By providing, in which to achieve the above object.

According to a second aspect of the present invention, the above-mentioned object is achieved by providing the elastic member supply device according to the first aspect, characterized in that the sheet is a diaper web.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a concrete elastic member supply device to which the present invention is applied will be described in detail below with reference to the drawings. This embodiment applies the elastic member supply device according to the present invention to a device for supplying and arranging the elastic member to the foot part of a continuously supplied diaper web when manufacturing a disposable diaper having a foot gather structure. It was done.

FIG. 1 is a schematic configuration diagram showing an elastic member supply device, FIG. 2 is a perspective view showing the overall configuration of the elastic member supply device, FIG. 3 is an enlarged front view of a guide roll, and FIG. 4 is elastic to a diaper web. It is a top view of the state where a member was arranged and fixed.

The elastic member feeding device of the present embodiment is a device for swinging the elastic member at a predetermined position of a continuously formed sheet of diaper webs to feed the elastic member in a predetermined curved shape. Is.

As shown in the schematic structure of FIG. 1, this elastic member supplying device supplies elastic members 1 made of rubber cords linearly supplied to guide rolls 4 by feed rolls 2 and 3. The elastic member 1 is slid into a curved guide groove provided on the roll peripheral surface, and the elastic member 1 provided in the guide groove is formed into a curved supply groove formed on the roll peripheral surface of the mother roll 5. The guide roll 4 is configured to be guided without swinging. A position fixing guide 6 for supplying the elastic member 1 to a predetermined position of the guide roll 4 is provided between the feed rolls 2 and 3 and the guide roll 4.

As shown in FIG. 2, the mother roll 5 is provided with a pair of curved supply grooves 7 on the roll peripheral surface 5a.
The elastic member 1 supplied to the supply groove 7 is arranged at a predetermined position of the diaper webs 8a and 8b which are continuously supplied by being swung by the rotation of a roll. .

The mother roll 5 is a fixed roll that does not move in the axial direction, and has a rotating shaft 9 provided at the center thereof.
By this, it rotates in the direction shown by the arrow in FIG. Supply groove 7 formed on the roll surface 5a
Is formed as a curve-shaped pattern obtained by transferring the arrangement pattern of the elastic member 1 provided around the legs of the disposable diaper.

The mother roll 5 in the feeder shown in FIG. 2 has a plurality of elastic members (three in FIG. 4) on both side edges of the elongated diaper web 8 as shown in FIG. The member 1 is arranged, and it is necessary to provide a plurality of supply grooves 7 (3 on each side, 6 in total) so as to correspond to the both side edges, and the guide roll 4 also corresponds to the supply groove 7. 2, it is necessary to provide two supply grooves 7 corresponding to the two guide rolls 4 and 4 in the central portion of the mother roll 5 in FIG. 2 for convenience of drawing.

The diaper webs 8a and 8b have a long shape and are respectively supplied from the left and right toward the mother roll 5 as shown in FIG. The elastic member 1 is supplied to the surface of one diaper web 8a, and the other diaper web 8b is sandwiched by the elastic member 1.
However, it is adapted to be stacked on the one diaper web 8a.

At a position close to the mother roll 5,
Elongated diaper webs 8a continuously supplied,
A pair of pressing rollers 10 and 11 for uniformly pressing the roller 8b against the roll surface 5a are provided. A guide roller 12 is provided below the pressing rollers 10 and 11 to guide the traveling of the diaper webs 8a and 8b.

The guide roll 4 is, as shown in FIG.
The roll peripheral surface 4a has a guide groove 13 provided corresponding to the supply groove 7 of the mother roll 5 and having a curved shape for guiding the elastic member 1 into the supply groove 7.

The guide roll 4 is the mother roll 5 described above.
Similarly to the above, the fixed roll does not move in the axial direction, and is rotated in the direction indicated by the arrow in FIG. 2 by the rotating shaft 14 provided at the center thereof. Further, the guide roll 4 is adapted to rotate in synchronization with the mother roll 5 by bringing the roll peripheral face 4a into contact with the roll peripheral face 5a of the mother roll 5.

The guide groove 13 formed on the roll peripheral surface 4a of the guide roll 4 coincides with the supply groove 7 of the mother roll 5 at the contact portion of the mother roll 5. As shown in FIG. 3, an inclined surface 15 is provided on the open end side of the guide groove 13 so that the linearly supplied elastic member 1 can be slid into the guide groove 13.
This inclined surface 15 is provided with the elastic member 1 supplied by the feed rolls 2 and 3 in the middle of the inclination shown by the one-dot chain line in FIG.
By rotating the guide roll 4, the guide roll 4 is slid into the guide groove 13 along the inclined surface 15.

In the elastic member feeding device constructed as described above, as shown in FIG. 2, the elastic member 1 guided by the position fixing guide 6 and fed linearly by the feed rolls 2, 3. Is the guide groove 1 of the guide roll 4.
3 is provided. The elastic member 1 provided in the guide groove 13 is supplied to the supply groove 7 provided in the roll peripheral surface 5a of the mother roll 5 that rotates in synchronization with the guide roll 4.

On the other hand, the hot melt bonding apparatus 1 shown in FIG.
The continuously supplied long-length diaper web 8a coated with the adhesive 17 by 6 is pressed against the roll peripheral surface 5a of the mother roll 5 by the pressing roller 10. Then, the elastic member 1 in the curved supply groove 7 is swung by the rotation of the mother roll 5, and the elastic member 1 is supplied and arranged at a position to be a foot portion of the diaper web 8a. At the same time, the elastic member 1
The adhesive 17 fixes the diaper web 8a. Then, the other diaper web 8b is superposed on the diaper web 8a so as to sandwich the elastic member 1.

As described above, in the elastic member supply device of this embodiment, neither the guide roll 4 nor the mother roll 5 is moved in the axial direction to swing the elastic member 1. Since the guide grooves 13 and the supply groove 7 having a curved shape are provided on the roll peripheral surfaces 4a and 5a of the mother roll 5, and the elastic member 1 is swung by the rotation of the mother roll 5, the elastic member 1 can be moved at high speed. It can be supplied to the diaper webs 8a and 8b. Therefore, the productivity of the disposable diaper can be significantly improved, and the yield can be improved.

Further, since a swing mechanism for swinging the guide roll 4 and the mother roll 5 in the axial direction is not required,
A complicated rocking mechanism is not required, and the device configuration can be simplified. Therefore, it is possible to provide a small-sized and inexpensive elastic member supply device.

The elastic member supply device according to the present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the gist of the present invention. In the above-described embodiment, the diaper web is used as the sheet that is continuously supplied, and the elastic member is attached to the predetermined position of the diaper web. However, the sheet is not particularly limited.

Further, in the above-described embodiment, the three elastic members 1 are arranged on each side edge of the diaper web 8. However, the number of the elastic members 1 is not limited to three, and is intended. Determined according to the diaper web 8. Correspondingly, as many guide rolls 4 as elastic members 1 are needed, and as many supply grooves 7 as the elastic members 1 are provided in the mother roll 5.

[0026]

As is apparent from the above description, according to the present invention, it is possible to arrange the elastic member in a curved shape at a predetermined position of the sheet at a high speed, which is excellent in productivity and simplifies the structure of the apparatus. It is possible to provide a supply device for the elasticized member.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an elastic member supply device to which the present invention has been applied.

FIG. 2 is a perspective view showing an overall configuration of an elastic member supply device to which the present invention has been applied.

FIG. 3 is an enlarged front view of a guide roll in an elastic member supply device to which the present invention has been applied.

FIG. 4 is a plan view showing a state in which an elastic member is arranged and fixed on a diaper web.

[Explanation of symbols]

 1 Elastic member 4 Guide roll 5 Mother roll 7 Supply groove 8a, 8b Diaper web 13 Guide groove

Claims (2)

[Claims] 1. A supply device for an elastic member, wherein an elastic member is swung at a predetermined position of continuously supplied sheets to supply the elastic member in a predetermined curved shape. A mother roll having a peripheral surface of a roll, the elastic member being supplied to the supply groove and being arranged at a predetermined position of the sheet that is continuously supplied by swinging by rotation of the roll; A guide roll provided corresponding to the supply groove and having a curved guide groove on the roll peripheral surface for guiding the elastic member to the supply groove, wherein the mother roll and the guide roll are both Is also a fixed roll that does not move in the axial direction, and an inclined surface for sliding the linearly supplied elastic member into the guide groove is provided on the open end side of the guide groove. Elasticity Material supply device. 2. The elastic member supply device according to claim 1, wherein the sheet is a diaper web.