JPH0333326Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a sewing device for sewing quilting skin material that is used as a material for cushion covers for automobiles, furniture, etc.

(Prior art) A skin material made by applying quilting in the longitudinal direction to a long sewing material in which a backing material such as wading material is layered on the back side of a skin material such as synthetic resin leather or fabric is disclosed in Japanese Patent Publication No. 57-22598. As shown in the publication, sewing is performed using a device in which a long piece of sewing material is fed to the tip of a needle using a guide roller.

(Problem that the invention aims to solve) However, in conventional devices of this type, the flexible wading material that is the backing member and the skin material have different elongation rates, so the skin material may wrinkle depending on the tension. In particular, quilted skin materials for covers that are covered with cushions that have curved support surfaces, such as recent automobile cushions, are either laminated with a backing material on the skin material in advance or are coated with a backing material. It is not possible to sew the desired shape without using a special tension roller whose unfolded length is shorter than the backing material, and even if these techniques are used, creases may occur or the outer material may be damaged. As a result, product defects were occurring frequently.

(Means for Solving the Problems) The present invention relates to a sewing device for quilting skin material that solves the above-mentioned problems, in which a long skin material and a backing material are fed into the needle tip and sewn thereon. In a sewing device for quilting skin material that forms a sewing line in the longitudinal direction, feeding guide frames are provided on both sides of the sewing table and the distance between them becomes narrower toward the needle tip, and the guide frames are provided in front of the needle presser. is characterized by the provision of a pleating roller mechanism for longitudinally pleating the backing material before it is superimposed on the skin material.

(Function) This sewing device for quilting skin material is
A backing material such as wading material and a skin material are fed separately toward the needle tip, and the two are overlapped just before the needle tip and sewn while passing through the needle presser to integrate sewing along the longitudinal sewing line. is the same as a conventional sewing device of this type, but the backing member is provided with a feeding guide frame whose mutual spacing becomes narrower toward the needle tip, and a pleating roller mechanism located in front of the needle presser. The skin material is fed into the needle tip with plenty of room to form pleats, while the skin material is fed into the needle tip without any folds being formed, so the skin material has tension after being sewn. If a cover sewn with the quilted skin material obtained in this manner is used, it will be fitted without wrinkling even when it is covered with a cushion whose support surface is curved.

(Embodiment) Next, the present invention will be described in detail with reference to the illustrated embodiment. 1 is a sewing table on which a needle presser foot 2 of a sewing machine is placed; Feeding guide frames 3, 3 whose mutual interval becomes narrower are provided, and a pleating roller mechanism 4 is provided between intermediate portions of the feeding guide frames 3, 3. The pleating roller mechanism 4 has a shaft 7 whose vertical position can be adjusted freely arranged in parallel above a rotary shaft 6 whose both ends are pivotally supported by brackets 3a, 3a provided outside the feeding guide frames 3, 3, and one shaft 7 which is vertically adjustable. A lower roller 8 is attached to the rotary shaft 6 at a required interval, and an upper roller 9 is attached to the other shaft 7 so as to be positioned between the lower rollers 8. As shown in FIG. 1, the rotary shaft 7 may be equipped with a drive source connected to a drive shaft via a belt transmission mechanism 5, or may be without a drive source. In addition, in the figure, 10 and 11 are a backing material supply reel provided at the base of the sewing table 1 and a skin material supply reel provided on the forward side thereof, and 12 is an overfeed amount when the backing material is forcibly fed. This is a clutch that detects this with a sensor 13 and stops the belt transmission mechanism 5.

With this structure, the tip of the backing material A, such as wading material, wound around the backing material supply reel 10 is pulled out and guided between the feed guide frames 3, 3 on the sewing table 1, and the backing material The skin material B wound on the skin material supply reel 11 is passed through between the lower roller 8 and the upper roller 9 of the application roller mechanism 4 and the needle presser 2 to reach the needle tip, while the skin material B wound around the skin material supply reel 11 is pulled out at its tip and transferred to the skin receiving shaft 13. is guided to the needle presser foot 2, where it is overlapped with the backing material A and brought to the needle tip, and a sewing line in the longitudinal direction is formed by the needle 2a.
Since the mutual spacing becomes narrower toward the needle tip side, the backing material A is sent to the pleating roller mechanism 4 with slack in the width direction, and the lower roller 8 is attached at a required interval below. rotating shaft 6
Then, between the shaft 7 where the upper roller 9 is located between the lower rollers 8 and 8, the backing material A that has become slack in the feeding guide frames 3 and 3 is moved by the lower roller 8 and the upper roller 9. A plurality of pleats are performed and the skin material B is overlapped, so that
The needle tip is fed as a sewing material in which a skin material without pleats is layered on a backing material having a plurality of folds extending in the longitudinal direction, and the bottom of each fold of the backing member with ample space is fed. A quilted skin material in which the tensioned skin material is sewn at the sewing line A can be easily obtained. Therefore, this quilted skin material was cut and sewn into the required shape and the fifth
In the case of a cover C for an automobile as shown in the figure, even if the support surface of the seat is a concave curved surface, the support surface is fitted to the concave curved surface and does not wrinkle.

(Effects of the invention) As is clear from the above description, the present invention can be used to sew covers for seats such as car seats.
The quilted skin material can be mass-produced at low cost and can be used to prevent wrinkles even if the seat is bucket-shaped or has a concave surface.It has a simple structure and can be incorporated into an existing quilting machine. Together with the advantages that can be achieved, the practical value is extremely great.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a partially cutaway plan view showing another embodiment of the present invention, and Fig. 3 is a partially cutaway side view of the main part thereof. FIG. 4 is an enlarged front view of the main parts, and FIG. 5 is a partially cutaway perspective view of a seat covered with a cover made of quilted skin material sewn according to the present invention. 1... Sewing table, 2... Needle presser, 3... Feeding guide frame, 4... Creasing roller mechanism.

Claims (1)

[Scope of utility model registration request] In a sewing machine for quilting skin material in which a long skin material and a backing material are fed into a needle tip to form a longitudinal sewing line thereon, a sewing line is formed on both sides of the sewing table 1 toward the needle tip. Feeding guide frames 3, 3 with narrow mutual spacing are provided, and in front of the needle presser 2, a pleating roller mechanism 4 is provided for longitudinally pleating the backing material before it is superimposed on the skin material. A sewing device for quilting skin material, which is characterized by: