JP3462240B2 - Wing folding device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wing folding device, and more particularly to a wing folding device provided on a packaging line for absorbent articles for folding a wing portion of the absorbent article. is there.

[0002]

2. Description of the Related Art In order to ensure that absorbent articles are securely fixed to underwear, for example, sanitary napkins or the like are provided with wing portions on both sides of the main body, and the wing portions have an adhesive surface to fix them to shorts or the like. It has already been proposed to ensure. In the conventional absorbent article with wings, an adhesive tape with release paper is attached to the wing portion to form an adhesive surface on the wing portion. When packaging the absorbent article, simply fold the wing part along the outer surface of the main body, and when using it, peel off the release paper of the wing part and adhere the exposed adhesive surface to shorts or the like. Therefore, the deviation and bias were eliminated, and the leakage of menstrual blood and the like caused by it was prevented.

However, in such a conventional absorbent article, the user side has a trouble of peeling the release paper and the trouble of discarding the same, and the producer side has a disadvantage of cost increase. . Therefore, recently, an absorbent article with a wing that does not use release paper has been proposed.For such an absorbent article with a wing, a release surface is provided on the outer surface of the main body, and the adhesive surface of the wing portion is the release surface during packaging. The structure is such that it folds so as to abut.

[0004]

However, the following problems occur when folding and packaging an absorbent article with wings without using such a release paper. Generally, according to a typical evaluation method of the adhesiveness of the adhesive surface of the wing part of the absorbent article, the stickiness degree of the surface shown by the loop tack test for shorts is 1000 to 2000 (g / 25mm).
Which is equivalent to about 2500 (g / 25 mm) loop tack for stainless steel. From the above test results, when the wing is folded with the left and right folding guides while the main body of the absorbent article is held and conveyed by the upper and lower belts like the conventional wing folding apparatus for absorbent articles with wings, the absorption with the conventional release paper is used. There is no problem with sex articles.
However, an absorbent article that does not use release paper has a problem that the adhesive surface of the wing portion directly contacts the upper conveyor belt unit. That is, since the absorbent belt or the like is in direct contact with the conveyor belt unit, stainless steel or the like that is less likely to rust or corrode is used. As described above, the stainless steel has a loop tack value of 2500 ( g / 25
mm), the wing portion may come into contact with the conveyor belt unit during conveyance and become fixed, making it practically impossible to bend the wing portion. Therefore, the object of the present invention is to
It is an object of the present invention to provide a wing folding device in which the wings of an absorbent article are bent at an accurate position and the wing does not become untransportable when being folded and transported.

[0005]

According to the present invention, a wing portion provided on each side of a main body of an absorbent article and provided with an adhesive surface for fixing to an undergarment is provided on a peeling surface formed on the main body. A wing folding device for an absorbent article with a wing that abuts against the adhesive surface to fold, comprising blow means for blowing air to the adhesive surface of the wing portion of the absorbent article that is folded while being conveyed. The above-mentioned object is achieved by providing a wing folding device.

The apparatus of the present invention is used for a part of the packaging process of absorbent articles, and the wing portions of the absorbent articles are folded while the absorbent articles are conveyed accurately at high speed. For this reason, in the absorbent article having the peeling surface provided on the main body, the adhesive surface of the wing portion may come into contact with the transport unit before contacting the peeling surface of the main body during transportation. There is. However, the blowing means of the apparatus of the present invention blows air to the adhesive surface during transportation to prevent it from abutting and adhering to the transportation unit or the like. As a result, even an absorbent article with a wing having such a structure can be accurately conveyed, and the adhesive surface does not abut the conveying unit, which makes it impossible to convey the sheet or a misalignment of folding. Can't be seen.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wing folding device according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is an explanatory diagram of a wing folding device according to this embodiment. FIG. 2 is a plan view of the wing folding device shown in FIG. FIG. 3 shows FIG.
It is sectional drawing which followed the II line. FIG. 4 shows II- of FIG.
It is a sectional view taken along the line II. FIG. 5 shows III-III of FIG.
It is sectional drawing which followed the line. FIG. 6 is a perspective view of an air blowing nozzle portion of the blow structure of the wing folding device in FIG.

As shown in FIGS. 1 to 6, the wing folding device 1 according to the present embodiment is provided on both sides of a body 71 of a sanitary napkin 70 (absorbent article) and has an adhesive surface for fixing to underwear. Wing parts 72, 72 with 73
The adhesive surface 73 is brought into contact with the peeling surface 74 formed on the main body 71 to fold. Then, the wing folding device 1 has the adhesive surfaces 73, 73 of the wing portions 72, 72 of the sanitary napkin 70 that are folded while being transported.
It has a blow structure 11 for blowing air onto the.
In addition, the conveyor belts 2 and 4 that come into contact with both surfaces of the main body 71 are provided for the transportation of the sanitary napkin 70, and the wing portions 72 and 72 are used for folding the wing portions 72 and 72.
And the peeling surface 74 of the main body 71 together with the conveyance belts 2 and 4 being conveyed.
Wing folding guides 16 and 16 are provided for guiding while bending toward.

The wing folding device according to this embodiment will be further described. First, as shown in FIGS. 2 to 5, the wing-equipped sanitary napkin 70 used in the wing folding device 1 of this embodiment has a surface that comes into contact with the skin. The material 81, a leak-proof back surface material 82, and an absorber 83 interposed between the front surface material 81 and the back surface material 82. The sanitary napkin main body 71 is formed in a long shape in which a surface material 81, an absorber 83, and a back surface material 82 are laminated, and the surface material 8 is provided on both sides of the main body 71.
Wing portions 72, 72 are formed by extending at least one of the backside material 82 and the backside material 82. Each wing portion 72 is adapted to be folded toward the back material 82 side which is the outer surface of the sanitary napkin 70, and each wing portion 72 surface facing the back material 82 adheres in a region of width 20 mm and length 25 mm. A surface 73 is formed. Further, a peeling surface 74 having a width of 50 mm and a length of 30 mm and having a peeling property with respect to the adhesive surface 73 is formed on the central surface of the outer surface of the main body 71.

Surface material 81, back surface material 82, and absorber 83
The material is a general-purpose material used in a known sanitary napkin, and the material is not limited in this embodiment. The adhesive surface 73 of the wing portion 72 is formed by applying an adhesive material. In this case, not only the adhesive surface formed by application but also an adhesive tape or the like may be used. An adhesive surface can be formed. Further, as the adhesive material, an adhesive material known per se can be used, but a rubber-based hot melt containing a styrene-butadiene-based elastomer as a main component is particularly desirable, and such a rubber-based hot melt is used in this example. , Its viscosity is 5000-5 at 150-200 ° C
00 cps. Adhesive surface 7 formed in this way
3 securely attaches to the shoes or the like when the sanitary napkin 70 is attached, and prevents the displacement or the like. On the other hand, the peeling surface 74 is
It is formed by fixing a commercially available release sheet or the like to the outer surface of the main body 71, and if the release surface 74 has a certain releasability with respect to the adhesive surface 73, the forming method and the material are used. There is no limit.

Next, as shown in FIGS. 1 to 6, the wing folding device 1 of this embodiment is placed as a part of a packaging line for the sanitary napkin 70. The wing folding device 1 is provided with a conveyor unit 3 having a second conveyor belt 4 on a first conveyor belt 2 which forms a part of a conveyor process.
The transport unit 3 includes a basic roll 5 around which the second transport belt 4 is wound, and rolls 6, 7, 8 and 9, and a long plate-shaped transport guide 10 having a substantially trapezoidal cross section. is doing. The second conveyor belt 4 includes a roll 7 and a roll 8.
The sanitary napkin 70 facing the first conveyor belt 2 between
The main body 71 is sandwiched along the longitudinal direction to form a transport path that can be accurately transported. Further, the second conveyor belt 4 circulates around the upper and lower surfaces of the conveyor guide 10.

As shown in FIGS. 4 and 6, the conveyance guide 10
The blow structure 11 is formed in the blow structure 11.
Has a first air passage 12, second air passages 13, 13 ..., And a third air passage 14. The base end of the first ventilation passage 12 communicates with an air blower (not shown), and the tip of the first ventilation passage 12 is formed at the center of the conveyance guide 10 and along the longitudinal direction of the lower layer portion. . A plurality of second ventilation passages 13 are formed in communication with the first ventilation passage 12 at predetermined positions,
The second ventilation passage 13 is formed substantially at right angles to the first ventilation passage 12 and horizontally. The diameters of the first ventilation passage 12 and the second ventilation passage 13 can be appropriately set according to the amount and rate of air blown out, but in the present embodiment, the diameter of the first ventilation passage 12 is 3 to. The diameter of the second ventilation passage is 5 mm, and the diameter of the second ventilation passage is 1 to 3 mm.

A plurality of third air passages 14 are formed in communication with the second air passage 13 at predetermined positions. The third air passage 14 forms a predetermined angle with respect to the vertical direction with respect to the second air passage 13. It is formed by attaching. That is, the tip of the third ventilation passage 14 is the air blowing nozzle 15, and the air blowing nozzle 15 is formed on the tapered upper surface of the transport guide 10. Then, the air from the nozzle 15 is tilted upward by 30 to 45 ° in the conveying direction of the sanitary napkin 70, and is blown out in a direction substantially perpendicular to the inclination of the upper surface (taper angle α in FIG. 4). Has become. The air blowing direction is 30 to 30 with respect to the conveying direction of the sanitary napkin 70.
The range of 70 ° is desirable, and the inclination α of the upper surface of the transport guide 10 is preferably in the range of 15 to 25 °. Within this range, the wing portion 72 is not sharply folded by the folding guide 16 to be described later even if the wing portion 72 is separated from the transport guide 10, and the main body 71 is peeled off while the adhesive surface 73 of the wing portion is not affected by the air blow. The surface 74 is accurately abutted and temporarily bonded.

As shown in FIGS. 2 to 4, the transport unit 3
A pair of wing folding guides 16, 16 each having a plate having a predetermined thickness are provided on both sides of the wing. As shown in FIG. 3, the wing folding guide 16 is used for the transport unit 3
It stands upright in the middle stage of the transfer unit 3 as shown in FIG.
In the subsequent stage, it is gradually twisted inward and inclined, and is substantially horizontal at a position further away from the transport unit 3. Then, the air blowing nozzle 15 of the above-described transport guide 10
Is formed from the position where the wing folding guide 16 begins to tilt. The wing folding guide 16 is designed so that the wing portion 72 can be smoothly folded around the wing folding lines A and B shown in FIG.
The lower surface of the is curved (reference numeral 16A in FIG. 4).

The wing folding device 1 thus constructed is provided as a line for the process of packaging and conveying the sanitary napkin 70. First, the sanitary napkin 70 is provided with the first conveyor belt 2 of the wing folding device 1 and the sanitary napkin 70. It is supplied between the second conveyor belts 4. The sanitary napkin 70 is a main body 71.
It is clamped by the belts 2 and 4 along the longitudinal direction thereof and conveyed accurately and at high speed. In this state, sanitary napkin 7
The wing portions 72, 72 of 0 abut on the wing folding guides 16, 16 which are erected as shown in FIG. 3, and rise up around the folding lines A, B in FIG. Then, when the wing portion 72 is further conveyed, it abuts against the curved lower surface 16A of the wing folding guide 16 and is smoothly folded.

On the other hand, when the wing portion 72 is folded, the adhesive surface 73 is pressed toward the lower surface 16A of the wing folding guide 16 via the air of the air blowing nozzle 15,
It does not come into contact with the stainless steel transport guide 10 of the transport unit 3. Further, although the transport unit 3 ends in the middle of the wing folding guide 16, the blowing of the air blowing nozzle 15 of the blow structure 11 causes the sanitary napkin 7 to blow.
It is inclined by 30 to 45 ° in the transport direction of 0, and therefore air is blown further downstream to exert an influence. Therefore, the wing portion 72 is affected by the air even after the wing portion 72 is disengaged from the transport unit 3, and a sharp fold does not occur at the end of the transport unit 3.

After passing through the transport unit 3, the adhesive surface 73 accurately abuts the peeling surface 74 of the main body 71 without being affected by air, and is temporarily adhered, and as a result, the sanitary napkin shown in FIG. The folding of 70 is completed.

[0017]

According to the wing folding device of the present invention, the wing of the absorbent article is bent at an accurate position, and the wing cannot be conveyed when the wing is folded and conveyed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a wing folding device according to an embodiment.

FIG. 2 is a plan view of the wing folding device in FIG.

3 is a cross-sectional view taken along the line I-I of FIG.

FIG. 4 is a sectional view taken along line II-II of FIG.

5 is a cross-sectional view taken along the line III-III of FIG.

FIG. 6 is a perspective view of an air blowing nozzle portion of the blow structure of the wing folding device in FIG.

[Explanation of symbols]

1 wing folding device 2 First conveyor belt 3 Transport unit 4 Second conveyor belt 5 basic rolls 6, 7, 8 and 9 rolls 10 Transport guide 11 Blow structure 12 First ventilation passage 13 Second ventilation passage 14 Third ventilation passage 15 Air blow nozzle 16 Wing Folding Guide 70 sanitary napkins 71 Body of sanitary napkin 72 Wing 73 Adhesive surface 74 Release surface

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields investigated (Int.Cl. ⁷ , DB name) A61F 13/15-13/84

Claims (2)

(57) [Claims] 1. A wing portion provided on each of both sides of a main body of an absorbent article and provided with an adhesive surface for fixing to an undergarment, the release surface formed on the main body being brought into contact with the adhesive surface. What is claimed is: 1. A wing folding device for folding an absorbent article with a wing, comprising a blowing means for blowing air to an adhesive surface of a wing portion of the absorbent article that is folded while being conveyed. 2. Conveying the absorbent article is provided with a conveyor belt that is in contact with each of both sides of the main body, and folding of the wing portion involves conveying the wing portion together with the conveyor belt. The wing folding device according to claim 1, further comprising: a wing folding guide that guides the fold folding toward the peeling surface.