JPH078359A - Beading of facing materials - Google Patents

Abstract

PURPOSE:To improve the appearance of a beading part by forming the beading in various forms, protect the beading from abrasion and improve the durability by making the size of the protrusion part of the beading smaller. CONSTITUTION:Beading 11 is formed consisting of a band-shaped beading main body 13 and an enhancing cloth 15 bonded to the back side of the beading main body 13. A linear protrusion part 17 with an almost-semicircular arc shape cross section is formed in the direction of length at the middle of the beading main body 13. The seam margin 19 is formed on right and left sides of the protrusion part 17 extended in cross direction. The overturned part(s) 21a at the edge(s) of the facing material 21 is sewed together with the enhancing cloth 15 on the seam margin parts on right and left sides of the protrusion part 17 of the beading main body 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bead of a skin material used for vehicle seats, furniture and other seats. More specifically, a ridge having a substantially semicircular cross section is formed at the center in the longitudinal direction. And a bead of a skin material provided with a strip-shaped bead main body made of a synthetic resin material extending from the ridge and having a seam allowance portion formed therein.

[0002]

2. Description of the Related Art Conventionally, a skin material used for vehicle seats, furniture, and other seats has a predetermined shape by sewing each end of the skin material divided into a main part, a side part, and a lateral gusset part. Is formed. At the time of this sewing, the bead is inserted into the end of each portion of the skin material so as not to expose the sewn portion, and is integrally sewn.

Japanese Patent Laid-Open No. 58-163312 and Japanese Patent Laid-Open No. 58-158217 exist as a conventional bead for a vehicle seat and a method for manufacturing the bead. The ball edges shown in these publications are formed of a ball core and a belt-shaped ball edge cover that covers the outer circumference of the ball core.

Further, as shown in FIGS. 5 and 6, a conventional bead 1 has a bead portion 3 having a substantially circular cross section formed on its head, and a sewing portion 5 is formed below the bead portion 3. ing. The bead portion 3 and the sewn portion 5 are integrally formed in a band shape from a thermoplastic synthetic resin.

On the outside of the bead portion 3 and the sewn portion 5, as shown in FIGS. 6 (a) and 6 (b), a bead cover 7 is joined, and a narrowing surface is formed on the bead cover 7. ing. An end of a skin material 9 to be sewn is sewn to the sewn portion 5 of the bead 1.

[0006]

However, these conventional bead 1 have a bead 3 having a substantially circular cross-section protruding outwardly, which has a limit in terms of molding, and since it protrudes, it is seated on the seat. However, a tensile force acts on the bead portion 3 at the time of getting on and off, and it may be rubbed or deformed, resulting in lack of durability and deterioration of appearance.

An object of the present invention is to enable easy and quick sewing of a terminal of a skin material used for vehicle seats, furniture and other seats by using a bead, and variously deforming the shape of the bead. Can be formed, the appearance can be improved, and the size of the projecting portion of the bead can be formed small,
It is intended to provide a bead of a skin material capable of preventing the bead from rubbing or deforming and improving the durability.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a ridge portion having a substantially semi-circular cross section at the center in the longitudinal direction, and the ridge portion in the width direction from both sides of the ridge portion. A strip-shaped bead body made of a synthetic resin material having a seam allowance portion formed thereon and a reinforcing cloth joined to the back side of the seam allowance portion of the bead body, and the ridge of the bead body. The ends of the skin material are sewn together with the reinforcing cloth at the seam margins on both sides of the portion.

[0009]

According to the present invention, a strip-shaped bead body made of a synthetic resin material is provided with a ridge having a substantially semi-circular cross section at the center in the longitudinal direction, and a seam allowance is formed in the width direction from both sides of the ridge. The part is extended and formed, and the shape embedded in the skin material can be expressed as a modeling shape, and since the reinforcing cloth is joined to the back side of the seam allowance part of the bead body, it is possible to improve the strength. In addition, the work of sewing the skin material can be performed easily and quickly, and the seam allowance can be easily curved even when the bead is arranged at the portion located at the curved portion, and the work of covering the skin material can be performed easily and quickly. It can be carried out.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The bead of the skin material according to the present invention will be described in detail below with reference to the drawings. 1 to 4 respectively show an outline of one embodiment of a bead of a skin material according to the present invention. The bead 11 of the skin material is a bead of a skin material of a vehicle seat in this embodiment. However, the present invention is not limited to this.

As shown in FIGS. 2 and 3, the bead 11 of the skin material is a belt-shaped bead main body 13 made of a synthetic resin material, and a belt-shaped cotton cloth and a gold cloth joined to the back side of the bead main body 13. ，
The reinforcing cloth 15 is made of non-woven fabric or the like.

The reinforcing cloth 15 can be integrally joined during extrusion molding of the bead body 13. When the reinforcing cloth 15 is integrally formed during the extrusion molding of the bead body 13, the reinforcing cloth 15 is flush with the bottom surface of the bead body 13,
The reinforcing cloth 15 may be retrofitted to the bottom surface of the bead body 13.

A ridge portion 17 having a substantially semi-circular cross section is formed at the center of the front side of the bead body 13 in the longitudinal direction. A through hole 17a having a circular cross section is formed at the center of the protrusion 17. The ridges 17 are not limited to being formed in a substantially semi-circular shape in cross section, and may have a shape close to an arc shape or other various shapes. In addition, the ridge 17
It is also possible to omit the through hole 17a having a circular cross section at the center of.

A pair of left and right seam allowance portions 19 are formed so as to extend in the width direction from both sides of the protrusion 17 of the bead main body 13. The pair of left and right seam allowance portions 19 are formed on both sides of the ridge portion 17 so as to have the same length in the width direction. The pair of left and right seam allowances 19 do not have to have the same length in the width direction from both sides of the protrusion 17, and the length can be appropriately adjusted according to the material of the skin material to be sewn.

The reinforcing cloth 15 joined to the back side of the seam allowance portion 19 of the bead body 13 can be formed over the entire length of the seam allowance portion 19, but in the present embodiment, one piece of the reinforcing cloth 15 is used for the seam allowance. It is joined to a part of the rear surface of the portion 19 centering on the protruding portion 17. The two reinforcing cloths 15 may be joined to the back surfaces of the left and right seam allowance portions 19.

As shown in FIG. 1, the lengths of the left and right seam allowance portions 19 of the bead main body 13 correspond to the length of the folded-back portion 21a of the end of the skin material 21, for example, if formed to 10 mm, It can be used for positioning the folded-back portion 21a of the skin material 21 when worn.

Further, as shown in FIGS. 3 and 4, the corrugated portion 1 is provided on the terminal side of the left and right seam allowance portions 19 of the bead body 13.
9a is formed, and the waveforms of the left and right corrugated portions 19a are formed to have opposite phases in the left and right seam allowance portions 19.

The waveform of the right and left wave-shaped portions 19a may be a rectangular wave or a sawtooth wave. By forming the corrugated portion 19a, it is possible to easily bend the left and right seam allowance portions 19 when they are bent in a direction in which they approach each other, and it is possible to improve the pair followability. 19
It can be formed thinner or omitted.

Next, the folded-back portion 2 of the end of the skin material 21.
The tip of 1a is aligned with the tips of the right and left corrugated portions 19a, and the position close to the folding back position of the folding back portion 21a of the end of the skin material 21 is sewn on both left and right sides of the ridge portion 17 of the bead body 13. By sewn together with the reinforcing cloth 15 at 19, the end of the skin material 21 can be sewn through the bead 11.

[0020]

The above is the configuration of one embodiment of the bead of the skin material according to the present invention. According to such a configuration, the center of the strip-shaped bead body made of a synthetic resin material in the longitudinal direction is formed. A ridge having a substantially semi-circular cross section is formed on the ridge, and seam allowances are extended from both sides of the ridge so that the size of the protrusion of the bead can be reduced. , It is possible to improve the durability by preventing the bead from rubbing or deforming,
In addition, the shape of the bead can be variously modified and formed to improve the appearance.

Further, since the reinforcing cloth is joined to the back surface side of the seam allowance portion of the bead body, the strength can be improved,
Furthermore, the sewing work of the skin material can be performed easily and quickly, and the seam allowance portion is easily curved even when the bead is arranged at the portion located in the curved portion, and the covering work of the skin material can be performed easily and quickly. It is possible to obtain a bead of a skin material capable of

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a sewing state of a skin material using a bead according to the present invention.

FIG. 2 is a cross-sectional view of a bead of a skin material according to the present invention.

FIG. 3 is a partial perspective view of a bead of a skin material according to the present invention.

FIG. 4 is a partial plan view of a bead of a skin material according to the present invention.

FIG. 5 is a cross-sectional view showing a sewing state of a conventional skin material using a bead.

FIG. 6 shows a bead of a conventional skin material, (a) is a partial perspective view, and (b) is a sectional view.

[Explanation of symbols]

 11 Ball Edge 13 Ball Edge Main Body 15 Reinforcement Cloth 17 Protruded Line Section 19 Seam Allowance Section 19a Corrugated Section 21 Skin Material 21a Folded Section

Claims (1)

[Claims] 1. A belt-shaped strip made of a synthetic resin material having a ridge having a substantially semi-circular cross section at the center in the longitudinal direction, and extending in the width direction from both sides of the ridge to form a seam allowance. It comprises a bead body and a reinforcing cloth joined to the back side of the seam allowance portion of the bead body, and ends of the skin material are sewn together with the reinforcing cloth at the seam allowance portions on both sides of the ridge portion of the bead body. A bead of a skin material characterized by being made as described above.