JP2691458B2 - Fastener assembly for seat cushions - Google Patents

Description

Description: “Industrial application field” The present invention relates to a seat of a vehicle such as an automobile or a furniture, in which a cover material is brought into close contact with the surface of a cushion material to conform to the shape of the seat. The present invention relates to a member for forming a surface fastener that is attached to a cushion material side and that engages with an engagement surface formed on the material side.

"Prior Art" Generally, a cover material is formed of a three-layer structure including a skin material (for example, fabric, knit, leather, etc.), a filler pad, and a backing cloth. Then, there is also one in which a hook-and-loop fastener is adhered to the back surface of the back base cloth by means such as sewing to form an engaging surface, but at present, it is possible to engage the hook-and-loop fastener integrally with the base cloth on the back surface of the back base cloth. An engagement surface is formed. This engaging surface is provided on the entire surface of the backing base cloth or in an area necessary for conforming the cover material to the shape of the sheet. On the other hand, a plurality of strip-shaped surface fasteners are usually attached to the cushion material side at the positions necessary to make the cover material conform to the shape of the seat. It should be noted that a large number of loops are formed on the engagement surface on the cover material side, and a large number of hooks that engage with the loops are usually provided on the fastener surface of the surface fastener on the cushion material side.

There are many means for bringing the cover material into close contact with the cushion material, but as a means that is both time-consuming and inexpensive, for example, "joint structure of cushion pad such as seat and cover material" described in Japanese Utility Model Publication No. Sho 64-6158. There is.

This means is a surface fastener (cover material) and a surface fastener on the cushion material side integrally attached to the cushion pad (cushion material) during foam molding of the cushion synthetic resin foam material.
The surface fastener is brought into close contact with the cushion material by joining the surface fastener provided on the.

However, in the above-mentioned means, the surface fastener placed on the mold is easy to move when the cushion material is molded. Therefore, a fastener assembly as shown in FIG. 4 is commercially available. In the figure, 21 is a base cloth, 22 is a fastener surface formed on the surface excluding the outer edge portion, and surface fasteners are formed by both 21 and 22. 23 is a paper adhesive tape placed on the fastener surface 22, and 24 is a thin strip-shaped iron magnetic material piece adhered to the surface of the adhesive tape 23. Reference numeral 25 denotes a thin synthetic resin sealing film, which covers the surface of the base cloth 21 together with the adhesive tape 23 and the magnetic piece 24, and is adhered to the outer edge of the base cloth 21 by means of heat bonding or the like.

Therefore, when the cushion material is foam-molded, if the fastener surface 22 of the fastener assembly faces the molding surface and is set in the molding die, the magnetic piece 24 is attracted by the magnet arranged in the molding die. Does not move. or,
The sealing film 25 allows the cushion material to be fastener surface
Do not impregnate 22. Then, after the cushion material is formed, if one end of the sealing film 25 is broken and the adhesive tape 23 is pulled,
The fastener surface 22 can be easily exposed.

"Problems to be Solved by the Invention" By the way, the foamed synthetic resin, which is a raw material of the cushion material, is foamed in a mold to be a product integrally molded with the fastener assembly or the surface fastener. At the time of this molding, since the foamed synthetic resin bubbles have expanded due to the reaction, no contraction has occurred. After the foaming is completed, if the product is taken out from the mold while the reaction heat is still stored inside the product, the reaction heat is lost and the air bubbles shrink when the product temperature drops to room temperature, causing the product to shrink. Wake up. Since the base cloth of the hook-and-loop fastener does not follow this contraction, the base cloth is corrugated by the amount of contraction of the cushion material, and therefore the fastener surface is also corrugated. In addition, with commercially available surface fasteners, when bent in the lengthwise direction toward the curved surface of the molding die, the magnetic piece of approximately the same length as the built-in surface fastener has an effect, and also the fastener surface is formed during molding. Cause waviness.

The waving of the fastener surface appears on the cover material joined to the cushion material, which deteriorates the appearance of the seat, and engages with the engaging portion between the engaging surface on the cover material side and the surface fastener on the cushion material side. As a result, there is a portion that does not occur, which may cause abnormal noise when sitting.

In addition, the surface of the cushion material will have a length of surface fastener on which tension acts. Therefore, even if tension is applied to the surface fastener when the cushion material bends,
The non-stretchable hook and loop fastener causes a so-called hammock condition, which adversely affects the sitting comfort.

In order to eliminate the waving of the fastener surface, the surface fastener may be divided into a plurality of fastener pieces, and those having a length such that the waving does not occur may be set in the forming die with a space.
However, in addition to increasing the number of setting steps, it causes quality problems such as variations in pitch between fastener pieces, steps, and twisting.

According to the present invention, the surface fastener on the cushion material side that engages with the engagement surface on the cover material side has good settability to the molding die when molding the cushion material, and after joining the cover material and the cushion material, The object is to make the appearance and the sitting comfort when sitting.

"Means for Solving the Problems" In order to achieve the above object, the fastener assembly of the present invention has the following configurations.

A plurality of fastener pieces, each having a fastener surface formed on the surface of the base cloth except for the outer edge portion, are arranged at intervals necessary for conforming to the shape of the skin material sheet and are independent from each other. A fastener piece constitutes a set of surface fasteners.

A magnetic portion made of a synthetic resin having elasticity and mixed with magnetic powder is placed on each fastener surface across the space.

Then, each fastener surface together with the magnetic member is sealed to the outer edge of the surface of the base cloth with a sealing film.

[Operation] First, when the fastener surface side is moved toward the molding surface of the molding die during foam molding of the cushion material, the magnetic member is attracted to the magnet arranged in the molding die, so that the surface fastener does not move. Further, since the surface fastener is divided into a plurality of parts at intervals, and the magnetic member has elasticity, it follows the curve of the molding surface well. Since each fastener piece is connected by the magnetic member, it can be set in the mold in one step.

At the time of forming the cushion material, the base fabric of the hook-and-loop fastener is impregnated with the foam synthetic resin as the raw material of the cushion material and is integrally attached to the surface of the cushion material, but each fastener piece and the magnetic member on the fastener piece are attached. Is sealed with a sealing film, so the raw material does not impregnate. Further, since the respective fastener pieces are spaced apart from each other, after the foaming is completed, even if the raw material contracts when the product is taken out, the respective fastener surfaces do not wavy.

The sealing film and the magnetic member are removed after molding,
The fastener surface can be easily exposed.

Since the surface fastener of the cushion material engaged with the engagement surface on the cover material side is composed of fastener pieces spaced apart from each other, even if a load is applied to the cushion, the load is absorbed by the cushion material.

[Effect] Since the surface fastener on the cushion material side using the fastener assembly of the present invention is composed of a plurality of independent fastener pieces at intervals, it is attached to the cushion material in a wavy state. As a result, a sheet that does not impair the appearance can be easily and economically formed.

Moreover, it is comfortable to sit without causing a hammock state.

[Embodiment] The present invention will be described in detail below based on an embodiment shown in FIGS. 1 to 3.

The fastener assembly is composed of a set of surface fasteners, magnetic members, and sealing films.

Reference numeral 1 denotes a surface fastener attached to the surface of the cushion material, which engages with an engagement surface formed on the cover material side. This hook-and-loop fastener 1 is formed by arranging three fastener pieces 2 which are independent of each other in a length necessary to align the cover material with the shape of the sheet with a gap L between them. There is. Reference numeral 3 is a base cloth, and 4 is a fastener surface formed by a large number of hooks, and each fastener surface 4 is formed on the surface of the base cloth 3 excluding the outer edge portion. One set of surface fasteners 1
The number of fastener pieces 2 and the length of the interval between them are arbitrary as long as they do not cause waviness on each fastener surface 2 upon contraction after the foaming of the cushioning material is completed, and that a hammock state occurs when seated on the seat. is there.

Reference numeral 5 denotes a surface fastener 1 which is placed on the side of the fastener surface 4.
Each fastener piece 2 is a thin synthetic resin magnetic member.
And has a length that covers the gap portion, that is, almost the same length as the surface fastener 1, and a width that is narrower than the width of the base cloth 3. The magnetic member 5 is made of elastic synthetic resin having elasticity, in the embodiment, urethane foam, which is a cushion material, mixed with magnetic powder. Therefore, the magnetic member 5
This is effective because the fastener assembly can be set in a single step when the magnet is set in the molding die in which the magnet is arranged, and it does not move.

Reference numeral 6 is a thin synthetic resin sealing film having the same width as that of the base cloth 3, and covers each fastener surface 4 and the magnetic member 5 in the space between the fastener pieces 2 via the magnetic member 5. The sealing film 6 is adhered to the lateral outer edge portion surface of the base cloth 3 of each fastener piece 2 together with the magnetic member 5 and also to the longitudinal outer edge portion surface of the base cloth 3 of each fastener piece 2 by means of heat bonding or the like. There is. Therefore, the fastener surface 4 of each fastener piece and the portion of the magnetic member 5 placed on the fastener surface 4 are sealed by the sealing film 6. In FIG. 3, the adhesive portion of the sealing film 6 is shown by hatching.

However, the sealing film 6 may seal only each fastener surface 4 and the magnetic member 5 thereon. Further, with the fastener pieces 2 at both ends of the pair of surface fasteners 1, it is possible to directly bond the sealing film 6 without providing the magnetic member 5 to the outer edge of the outer lateral hand.

In order to attach the surface fastener 1 to the cushion material, the sealing film 6 of the fastener assembly is placed on the molding surface of the molding die on which the magnet is arranged (that is, the back surface of the base cloth 3 faces up), and the magnetic member 5 is molded. Set by adsorbing to the mold magnet.

Then, the foamed synthetic resin liquid, which is the raw material of the cushion material, is injected into the molding die. The raw material is not impregnated into each fastener surface 4 and the magnetic member 5 in a portion in contact with the fastener surface 4 by the sealing film 6, but is impregnated into the base cloth 3 and attached to the cushion material as a set of surface fasteners 1. .

After the completion of forming the cushion material, the sealing film 6 is broken to remove the magnetic member 5 to expose each fastener surface 4.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view, FIG. 2 is a partially cutaway plan view, and FIG. 3 is an enlarged plan view of essential parts showing a bonding state of a sealing film. FIG. 4 is a partially cutaway plan view of a commercial product. 1 …… One set of fasteners 2 …… Fastener piece 3 …… Base fabric 4 …… Fastener surface 5 …… Magnetic member 6 …… Sealing film

Claims (1)

(57) [Claims] 1. A cushion material made of foamed synthetic resin is closely contacted with the cushion material to conform to the shape of the seat, so that the cushion material is integrated with the surface of the cushion material that engages with the engaging surface of the back base cloth of the cover material. Used to form hook-and-loop fasteners that are attached to a plurality of fastener pieces with the fastener surface formed on the surface of the base fabric excluding the outer edges, so that the cover material can be aligned with the shape of the sheet with a gap between them. The fasteners are arranged in the required length to form a set of surface fasteners with mutually independent fastener pieces, and each fastener surface is made of a stretchable synthetic resin mixed with magnetic powder on each fastener surface across the gap. A fastener assembly for a cushion material for a seat, wherein a magnetic member is placed and each fastener surface together with the magnetic member is sealed to an outer edge portion of a surface of a base cloth with a sealing film.