JP2005058549A - Adhesive sheet and method for adhering the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the feel of the surface of an adhesive sheet. <P>SOLUTION: An adhesive 3 is applied to the inside of a recess groove 10 formed on the surface of a pad 1 made of a foamed body, and the part of a cover material 2 covering the pad 1 is made to bite into the recess groove 10 of the pad, and is pressed and is bonded. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an adhesive sheet such as an automobile sheet formed by adhering a skin material to a foam pad molded in a substantially outer shape of a sheet, and an adhesion method thereof.

As described above, an automotive sheet includes an adhesive sheet in which an adhesive is applied to the entire seating surface of a molded foam (for example, urethane foam) pad, and a skin material is pressed and adhered to the seating surface (for example, Patent Document 1).
Japanese Patent Laid-Open No. 9-182881

  Since the above adhesive is sprayed on the pad with a liquid, there is a possibility that the operator may lose the suction of the adhesive. Since such work is performed in a sealed room, there is a problem of poor workability.

  In order to solve this problem, there is one using a hot melt adhesive.

  However, when the skin material is adhered to the entire seating surface of the pad with an adhesive, the flexibility is impaired due to the curing of the adhesive, and the seating surface of the sheet has a poor touch.

  Then, this invention aims at removing the malfunction of such a conventional adhesive sheet.

  In order to achieve the above object, the present invention comprises a foam pad having a groove on the surface and a skin material covering the skin of the pad, and an adhesive adhered in the groove of the pad. In this configuration, a part of the skin material bitten into the groove is pressed and bonded.

  With the above configuration, the skin material is bonded to the pad with an adhesive only in the concave groove of the pad.

  Further, the adhesive is a hot melt adhesive, and the hot melt adhesive is melted by heating with a heating device provided in a portion corresponding to the groove of the pad in a pressurizing mold that pressurizes the skin material onto the pad. The skin material is bonded to the recessed groove of the pad.

  Therefore, a part of the skin material can be bonded into the concave groove of the pad at the same time when the skin material is pressed onto the pad.

  By using the heating device as a steam generating device, the hot melt adhesive is melted by the heating of the steam to bond the skin material.

  And it becomes easy to adhere an adhesive agent in the concave groove | channel of a pad by using the thing of the said adhesive agent in a gel state.

  According to the first aspect of the present invention, since the skin material is bonded only in the recessed groove of the pad and the other part is not bonded to the pad, in the case where the recessed groove is provided on the seating surface side of the pad, The skin material where the passenger's body comes into contact is not bonded to the pad with an adhesive.

  Therefore, the problem of the conventional product due to the curing of the adhesive can be solved.

  According to the present invention of claim 2, when the skin material is pressed against the pad, at the same time, the skin material which melts the hot melt adhesive and is bitten into the groove of the pad is bonded. Can be easily and quickly performed.

  According to the third aspect of the present invention, it is possible to melt the hot melt adhesive with steam and to melt the hot melt adhesive accurately and quickly.

  According to the fourth aspect of the present invention, since the adhesive is in a gel state, the adhesive can be reliably attached in the recessed groove of the pad, and the adhesive is not scattered outside the recessed groove of the pad.

  Moreover, since it is an adhesive agent in a gel state, it can be easily melted by a heating device such as steam, and the skin material can be reliably bonded in the concave groove of the pad.

Hereinafter, an example of the present invention will be described with reference to the drawings.
1 and 2 show a state in which the skin material 2 is bonded to the pad 1, and the pad 1 is a foamed body such as urethane foam molded into the outer shape of a seat cushion or seat back of an automobile seat, and the surface thereof. , For example, decorative concave grooves 10, 10... Are simultaneously formed on the seating surface. The illustrated pad 1 is attached to a fixed mold 5. In the figure, 10 indicates a frame.

  The skin material 2 is a stretchable and breathable member, such as a woven fabric, a nonwoven fabric, or a fabric having a wadding integrally therewith, and a bag-like shape covering the seating surface and the outer surface of the pad 1. And placed on the pressure die 4 in an inverted state. In the figure, reference numeral 20 denotes a skin material biting portion that is bitten into the groove 10 of the pad 1.

  The adhesive 3 is adhered in the concave groove 10 provided on the seating surface side of the pad 1, as shown in FIGS. 3 and 4, and this adhesive 3 uses a hot melt adhesive in a gel state. Is preferred.

  The pressing mold 4 is formed so that its pressing surface coincides with the seating surface of the pad 1. That is, ridges 4A, 4A are formed at positions corresponding to the concave grooves 10 of the pad 1, and a large number of outlets 41, 41... Of the heating device are opened upward in the ridges 4A.

    The heating device is a steam generating device that generates steam to such an extent that the hot melt adhesive in the gel state is melted through the biting portion 20 of the skin material 2.

In FIG. 1, P is a steam generator in the figure, and is configured such that steam is injected from the outlets 41, 41...
In the figure, reference numeral 42 denotes an air or hydraulic cylinder that expands and contracts the pressure die 4 in the direction of the fixed die 5.

  Next, the bonding method will be described. First, the adhesive 3 is adhered in the recessed groove 10 of the molded pad 1 as shown in FIG. 1 and FIG. The side is fixed downward, and the skin material 2 is turned over and placed on the pressure die 4.

  Next, the pressing mold 4 is raised, and the skin material 2 is pressed against the seating surface of the pad 1. Thereby, the biting part 20 of the skin material 2 is bitten by the convex strip 4 </ b> A of the pressing mold 4 in the concave groove 10 of the pad 1.

At the same time, steam is sprayed from the steam generator P through the outlets 41, 41. Then, the steam is applied to the adhesive 3 in the concave groove 10 of the pad 1 through the biting portion 20 of the skin material 2.
Therefore, the adhesive 3 melts (reactivates the adhesive 3), and adheres the biting portion 20 of the skin material 2.

Thereafter, the spraying of the steam is stopped, and the pressure applied to the pad 1 of the skin material 2 is maintained for a certain time to cool the adhesive 3.
By the cooling of the adhesive 3, the biting portion 20 of the skin material 2 is completely adhered in the concave groove 10 of the pad 1, so that after cooling, the pressure die 4 is lowered and the skin material that the fixed die 5 has The pad 1 with 2 is removed from the fixed mold 1.
Then, the skin material 2 in an inverted state is turned over to cover the outer surface of the pad 1, and the end of the skin material 2 is fixed to the bottom surface side of the pad 1. This completes the adhesive sheet.

  In addition, what is illustrated shows a steam generator as a heating device, but other heating means, for example, a heating device that is built in the pressurizing die 4 and heats the ridges 4A by electric heat generation may be used.

It is sectional drawing explaining the method which concerns on this invention. It is the elements on larger scale of FIG. It is a perspective view of the pad used for the present invention. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Pad, 2 ... Skin material, 3 ... Adhesive, 4 ... Pressure type, P ... Heating device, 10 ... Pad groove

Claims (4)

  The skin material having a foam pad having a concave groove on the surface and a skin material covering the skin of the pad, and having been swallowed into the concave groove by an adhesive adhered in the concave groove of the pad An adhesive sheet formed by pressing and bonding a part of   The adhesive is a hot melt adhesive, and the skin material is obtained by melting the hot melt adhesive by heating with a heating device provided in a portion corresponding to the groove of the pad in a pressurizing mold that presses the skin material against the pad. A method for adhering an adhesive sheet, comprising: adhering an adhesive in a recessed groove of a pad.   The adhesive sheet bonding method according to claim 2, wherein the heating device is a steam generator.   The adhesive sheet and the adhesive sheet bonding method according to claim 1, wherein the adhesive is in a gel state.

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