JPH0439358B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Object of the invention Industrial application field The present invention relates to a method for manufacturing a trim cover used to cover the surface of a cushion body when manufacturing seats for furniture or vehicles. It is something.

BACKGROUND ART Normally, when manufacturing a trim cover by integrally joining a skin material 1, a wadding material 2, and a backing material 3, an uneven pattern P is formed on the surface. When the three parts are simply overlapped and sewn or welded together (see Figure 1) during the forming process, the wading material 2 is placed on the back side so that the backing material 3 bulges due to the elongation rate or tensile strength of the skin material 1. As a result, the roughness of the uneven pattern appearing on the surface side cannot be maintained to a large extent, and it is unavoidable that the uneven pattern becomes unclear.

Therefore, conventionally, the concave groove 4 of the wading material 2
The skin material 1 is aligned and arranged along the surface of the wadding material 2 provided with the groove, and the backing material 3 is applied to the back side of the wading material 2, and the three are sewn or welded at the recessed part. etc. are used to join them. (See Figure 2 a, b).

Problems to be Solved by the Invention In this manufacturing method, when the skin material 1 is assembled on the surface of the grooved wadding material 2, the skin material 1 is aligned individually while taking a tack corresponding to the grooves 4. The skin material 1 is prone to stitching, waviness, etc., and the work is very labor-intensive, and there are also disadvantages in terms of durability when the sheet is used, such as poor retention of wrinkles and uneven shapes of the skin material.

(2) Means for Solving the Constituent Problems of the Invention The present invention provides a trim cover that forms a clear uneven pattern by increasing the density of the wading material around the convex portions without causing wrinkles or undulations in the skin material. In this method, a backing material is produced by invading a surface material portion having a wading material that is relatively thinner than the wading material forming the intermediate layer into a groove formed in the wading material of the intermediate layer. In order to integrally join the three parts, the thickness of the wading material is left at the groove bottom part compared to the wading material laminated to the skin material in advance, and the wall thickness is made relatively thicker in some parts of the groove bottom. A groove is formed by leaving a groove in the wading material, and the groove is indented along the groove surface of the wading material together with the skin material, thereby integrally joining the three members including the backing material.

Function In this method of manufacturing a trim cover,
By laminating the wading material on the skin material in advance and invaginating the skin material part into the groove of the wading material, it is possible to easily combine the skin material without creating seams or undulations, and moreover, the skin material has Since the wading material is pressure-welded along the groove surface, the density around the convex parts can be increased, making it possible to form a clear uneven pattern.Furthermore, it is possible to form a clear uneven pattern by leaving a relatively thick wall thickness at the groove corners. By forming these three parts, when the three parts are joined together, the density of the convex contour becomes extremely high, making it possible to form an extremely clear concavo-convex pattern.

Embodiments Hereinafter, description will be given with reference to FIGS. 3 to 12. In the illustrated embodiment, the case is roughly divided into two cases in which the skin material 10 is laminated to the wadding material 11 in advance and the grooves 13 are formed on the back surface before joining to the backing material 12. Also, grooves 13 are provided on the surface side of the wadding material 11, and the skin material 10 and the backing material 12 are integrally joined.

In the former case, first, a skin material 10 and a wading material 1 such as a flat urethane slab having a predetermined thickness are prepared.
1 is laminated with an adhesive applied by a roll coater C, or so-called flame lamination is performed in which the surface of the urethane slab is melted by flame and the skin material 10 is welded thereto (see FIG. 3).
Next, a substantially concave groove 13 is formed on the back side of the wading material 11 by cutting away the wall thickness.

This groove can be formed by rotating and contacting a tip saw S such as a grooved cutter while the wading material 11 is being continuously conveyed, and the chips can be removed by sucking it with a vacuum V or the like (see Fig. 4). reference). In addition, in the case of the grooved shape, the wading material 11a with a thickness of 1,000 yen remains at the bottom of the groove, and the width is relatively larger than the width of the concave part of the concave-convex pattern P to be finally formed. . The width is the recess width _l1 to be finally formed and the depth W of the groove 13.
(see Fig _{. 5} ). Other than that, the grooves 13 can be formed to any depth or in any desired pattern depending on the thickness of the wading material 11. After this groove installation,
The skin material portion 10a at the groove cutting location is recessed toward the groove side so as to take a tack, and the wading material 11a left with a small thickness is aligned and positioned along the groove surface. The invagination is caused by multiple tack feeding rolls R ₁ , R ₁ ′,
This can be carried out using a tack machine T equipped with R _{1 '} ', R ₂ , R 2 ′, R ₃ , R ₃ '. This tack machine T can form an uneven pattern having, for example, three concave portions. In this case, while being guided by the guide plate G, the feed roll R ₁ is used to move the material closer to the width from the center.
Next, the left and right feed rolls R ₂ , R ₃ and the feed roll R ₁ ′ placed slightly lower than these act on the feed rolls R ₁ ″, R ₂ ′, which are placed at the same level.
It is recommended to apply R ₃ ' (see Figures 6a and b). In the skin material part, an adhesive or welding agent is applied to the side surface of the groove 13, and the wading material 11a left in a small thickness can be adhered to the groove surface, and this adhesion prevents mutual displacement etc. The shape of the invaginated part can be maintained. After the invagination, a flat backing material 12 is applied to the back side of the wading material 11 and the skin material portion 10 is
The recessed part of a is joined by sewing or welding, and the wading material 11 and the lining material 1 are
The trim cover is manufactured by joining the skin material 10, the wadding material 11, and the backing material 12 together by joining them with an adhesive such as hot melt or partial welding. When joining, when using the quilting machine K, it is preferable to press each recess with a tack feed board B to prevent the tack from shifting (see Figures 7a and 7b). Furthermore, the steps of grooving, tucking, and joining can be performed continuously and automatically.

When shaping the uneven pattern in this way,
Since the skin material 10 is laminated with the wading material 11 in advance and the wadding material 11a is left in the shape of the substantially concave groove 13, the skin material 10 is
It can be easily invaginated into the groove 13 without adding stitches or undulations to the groove. Further, the wading material 11a left at the groove bottom increases the density of the part pressed against the inner surface of the groove 13, so even if wrinkles occur, they can be removed by the stretching force of the wadding material 11a, and the uneven pattern P The shape of the convex portion can be made clearer, and the shape retention can also be improved (see Fig. 8).

In the above embodiment, the skin material 10 and the wadding material 11 were laminated in advance, but at the time of lamination, the backing material 12 was also laminated together, and then the wading material was cut between layers to an appropriate thickness, and the wading material was bonded to the skin material side. 11 may be grooved.

In addition, when wading materials 11b and 11c, which are relatively thicker than the wading material 11a left at the groove bottom, are partially left at the groove bottom during groove cutting, the thickness of the wading materials 11b and 11c is lower than the density near the contour of the uneven pattern P. In order to further improve the shape, not only the outline shape becomes clearer, but also the shape retention property can be improved (see FIGS. 9a to 9d).

Wadding material 11 formed relatively thickly
b, 11c can be formed in any shape as long as it can increase the density near the contour of the uneven pattern P (see FIGS. 10a to 10g). for example,
A plurality of protrusions are formed in the groove bottom in a small sawtooth shape (see figure a) or semicircular arc shape (see figure b) to leave a wall thickness, and these are made to have approximately the same thickness as the wading material 11. It may also be formed with a certain degree of rise (see c and d in the same figure). Alternatively, it is also possible to form sawtooth-like rises that open left and right on the groove bottom (see e in the same figure), or to form the groove bottom into a substantially concave shape and chamfer the groove edges ( (See figure f).
Depending on these grooving shapes, the edges of the uneven pattern P can be finished into any shape (see g in the same figure).

Apart from cutting grooves on the back side of the wading material 11 on which the skin material 10 has been laminated in advance, grooves are cut on the front side of the wading material 11 and the skin material 1
0. The backing material 12 can also be integrally joined.
In this case, the skin material 10 includes a wading material 1 that is relatively thinner than the wading material 11 forming the intermediate layer.
1a is laminated in advance, and this is used as wading material 1.
It is only necessary to invade the groove 13 of No. 1. In this embodiment, the skin material 10, the wading material 11, and the backing material 12 are laminated together in advance, and then the skin material side is made relatively thin and the wadding material 11 is cut between layers, so that the backing material side is It can also be used to cut grooves into thick wading materials. (Figure 11a
- d).

Furthermore, when slicing the wading material 11, the skin material 10 is cut by inverting the back inner material 12 and cutting the grooves.
It is preferable that the thick wading material 11e on the back inner material 12 side be exposed to the back side of the cover (see FIGS. 12 a to 12 d). When the trim cover is applied to the cushion pad, the back side made of a slab material such as urethane comes into contact with the pad surface, so compared to the inner lining material made of kanakin or non-woven fabric, it is impregnated with a mold release agent such as paraffin wax and molded. This makes it possible to significantly reduce the amount of cushion pads that have been damaged.

(3) Effects of the invention As described above, according to the method for manufacturing a trim cover according to the present invention, the skin material is made into a composite material with the wading material in advance and invaginates the kerf, and the relative strength of the skin material is By using thin wading material to increase the density of the inner surface of the groove, the skin material can be easily aligned with the wading material without wrinkles or undulations, and the uneven pattern is clear while retaining its shape. By improving the trim cover, it is possible to manufacture a trim cover with excellent durability in use without wrinkles, sagging, etc.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams showing a conventional trim cover manufacturing method and its problems, and Figures 3 to 5 are
6a, b and 7a, b are explanatory diagrams showing the manufacturing process of the trim cover according to the present invention, and FIG. 8 is a partial sectional view of the trim cover manufactured by the same method.
Figures 9a to 10d and 10a to 10g are explanatory diagrams showing examples of the shape of grooves formed in the wading material, and Figure 11a
-d and FIGS. 12a to 12d are explanatory views showing different embodiments of the trim cover manufacturing method according to the present invention. 10: Skin material, 11: Wading material, 11a,
11b, 11c: relatively thin wading material,
12: Backing material, 13: Groove.

Claims (1)

[Scope of Claims] 1. A groove is formed by cutting the wall thickness of the wading material, and a skin material portion having a relatively thin wading material is invaginated along the groove surface, and then the surface material and the wading material are and a method for manufacturing a trim cover, characterized in that an uneven pattern is formed by integrally joining three parts of the inner backing material. 2. A groove is formed on the back side of the wading material laminated with the skin material in advance, leaving some thickness, and the part of the skin material having the relatively thin wading material at the grooved part is invaginated along the groove surface. The method for manufacturing a trim cover according to claim 1, wherein a flat inner lining material is applied to the back surface of the trim cover to integrally join the three members. 3. On the back side of the wading material, which has been laminated with a skin material in advance, a groove is formed by leaving some wall thickness at the groove bottom, and also leaving a relatively thick part at the groove bottom, and the relatively thin wall at the groove cutting part is formed. A trim cover characterized in that a surface material portion having a wading material is recessed along the inside of the groove, a flat inner lining material is applied to the back surface of the material, and an uneven pattern is formed by integrally joining the three parts. Production method.