JP2001254246A - Three-dimensional woven fabric and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject woven fabric having a curved portion and so designed as to keep the space between upper and lower cloths constant and link connective yarns to both the upper and lower cloths, and to provide a method for producing such a woven fabric. SOLUTION: This three-dimensional woven fabric having a curved portion is composed of an upper cloth 1 and a lower cloth 2 and connective yarns 3 linked to both the upper and lower cloths 1 and 2. The connective yarns situated at the curved portion extend toward the center of the curvature of the curved portion, thereby the space between the upper and lower cloths is kept constant. The other objective method for producing such a three-dimensional woven fabric comprises the following two steps: the surfaces, facing each other, of a formwork having a curved portion and a specified thickness are provided with an upper cloth and a lower cloth, respectively; and connective yarns are threaded toward the center of the curvature of the curved portion and set onto both the upper and lower cloths. This three-dimensional woven fabric thus obtained affords such an advantage that a polymeric bag with a curved portion, high in mechanical strength of the connective yarns and constant in hollow portion height can be produced by providing rubber layers on the inner (and outer) surface(s) of the above woven fabric and the yarns.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a three-dimensional woven fabric and a method for producing the same, and more particularly, to a curved three-dimensional woven fabric and a method for easily producing the three-dimensional woven fabric.

[0002]

2. Description of the Related Art As shown in FIG. 3, a perspective view of a three-dimensional woven fabric excluding an upper fabric, a flat upper fabric 1 and a lower fabric 2 are shown.
And the upper cloth 1 and the lower cloth 2 are connected by a connecting thread 3. Such a three-dimensional woven fabric is, for example, shown in FIG.
As shown in FIG. 1, the edges of the upper cloth 1 and the lower cloth 2 are connected by sewing or the like, and a rubber layer 4 is provided on at least the inner surface of the upper cloth 1 and the lower cloth 2 and the surface of the connection thread 3 to form an air mat. Alternatively, it is used for a product having a hollow portion such as a water bet (for example, Japanese Patent Application No.
-206, 242). By using the three-dimensional woven fabric as described above, the connecting yarn 3 provided with the rubber layer 4 on the surface connects the upper and lower rubber layers 4 to maintain the shape or strength of the product. There is no need to provide
Since a desired bag-like body can be easily manufactured and the strength depends on the connecting yarn, there is an advantage that the product design of the bag-like body becomes easy.

In such a three-dimensional woven fabric, conventionally, a connecting yarn 3 for connecting the upper fabric 1 and the lower fabric 2 is perpendicular to the upper fabric 1 and the lower fabric 2 as shown in FIGS. Is provided. In the case of a three-dimensional woven fabric having such a structure, when a flat product is manufactured, a good product can be manufactured without any trouble. However, when the product to be manufactured has the curved portion 5, the connection is performed. The thread 3 is, for example, as shown in FIG.
It cannot be connected so that the distance between the upper cloth 1 and the lower cloth 1 is the same as the distance in the linear portion, and it is not possible to form a hollow part in which the distance between the upper cloth 1 and the lower cloth 1 is constant. There are drawbacks.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and in a three-dimensional woven fabric having a curved portion, a three-dimensional woven fabric in which connecting yarns are connected while maintaining a constant distance between an upper cloth and a lower cloth. It is an object of the present invention to provide a manufacturing method thereof.

[0005]

To solve the above problems, a three-dimensional woven fabric according to the present invention has an upper cloth, a lower cloth, a connecting thread for connecting the upper cloth, and a curved portion. In the three-dimensional woven fabric, the connection yarn of the curved portion extends in the direction of the center of curvature of the curved portion, whereby a constant distance is provided between the upper cloth and the lower cloth.

Further, the method for producing a three-dimensional woven fabric according to the present invention comprises the steps of providing an upper cloth and a lower cloth on a facing surface of a mold member having a curved portion curved at a predetermined curvature and having a predetermined thickness.
The method further includes a step of passing a connecting thread in the direction of the center of curvature of the curved portion, fixing the connecting thread to the upper cloth and the lower cloth, and removing the mold member.

According to the present invention, since the connecting yarn in the curved portion of the three-dimensional woven fabric is provided in the direction of the center of curvature of the curved portion, the hollow portion can maintain a constant height even in the curved portion. Become. Further, according to the method for manufacturing a three-dimensional woven fabric according to the present invention, an upper cloth and a lower cloth are provided on a mold member having a curved portion having a predetermined curvature, and the upper member and the lower fabric are connected in the direction of the center of curvature of the curved portion of the mold member. Because it was fixed to the upper cloth and the lower cloth through the thread,
It is possible to easily manufacture a three-dimensional woven fabric in which the distance between the upper cloth and the lower cloth is constant.

[0008]

FIG. 1 is a side view of a three-dimensional woven fabric according to the present invention. As is apparent from this figure, the three-dimensional woven fabric according to the present invention has an upper cloth 1 and a lower cloth 2. The upper cloth 1 and the lower cloth 2 are connected by a connection thread 3. The three-dimensional woven fabric has a curved portion 5, and a plurality of connection yarns 3 in the curved portion 5 extend in the direction of the center of curvature of the curved portion 5, respectively, and are connected to the upper cloth 1 and the lower cloth 2, respectively. It has a structured structure. By connecting the connecting yarns 3 in this manner, for example, the distance between the upper cloth 1 and the lower cloth 2 of the straight section 6 and the distance between the upper cloth and the lower cloth 2 of the curved section 5 become the same, and the manufactured product is manufactured. There is an advantage that the height of the hollow portion becomes constant. Further, as shown in FIG. 5, the connection yarn 3 in the curved portion 5 does not twist or sag, so that the connection yarn 3 on which the rubber layer 4 is formed can maintain good strength.

According to the present invention, there is also provided a method for producing the three-dimensional woven fabric. According to the present invention, first, a mold member 7 having a curved portion 71 is prepared (FIG. 2a). In this example,
The mold member 7 is connected to the above-described curved portion 71 and connected to the linear portion 72.
However, the curved portion 71 may be provided continuously.

The mold member 7 has a constant thickness so that the distance between the upper cloth 1 and the lower cloth 2 of the manufactured three-dimensional woven fabric is constant. The upper cloth 1 and the lower cloth 2 are provided on the outer side surface and the inner side surface (opposing surface) of such a mold member 7 by temporary fixing or the like (FIG. 2B).

After the upper cloth 1 and the lower cloth 2 are temporarily fixed and provided on the opposing surfaces, the upper cloth 1 and the lower cloth 2 are connected and fixed by a connecting thread 3 (FIG. 2c). At this time, the connection yarn 3 is, in the curved portion 71, the center of curvature C of the curved portion 71.
It is fixed to the upper cloth 1 and the lower cloth 2 so as to extend in the direction.
The connecting thread 3 is provided in the straight portion 72 in a direction perpendicular to the upper cloth 1 and the lower cloth 2 as in the conventional case. At this time, a material (for example, styrene foam,
The connection thread 3 is connected to the needle by manufacturing with rubber, etc., and the connection thread 3 can be transmitted from the upper cloth 1 to the lower cloth 2 by a sewing technique and fixed. Alternatively, the mold member 7 may be made of plastic, and a passage hole may be formed in the needle passage direction (the direction of the center of curvature C).

After fixing the connecting thread 3, the mold member 7 is removed. Various removal methods are conceivable. For example, it is possible to break and remove the mold member 7. It can also be dissolved and removed. For example, when the mold member 7 is a polystyrene foam, it can be easily broken and can be removed by melting. further,
In the present invention, it is particularly preferable as the material of the mold member 7 because it has an advantage that the needle easily penetrates.

By removing the mold member 7 in this manner, a three-dimensional woven fabric having a curved portion as shown in FIG. 1 can be easily manufactured.

[0014]

As described above, according to the three-dimensional woven fabric and the method of manufacturing the same according to the present invention, a three-dimensional woven fabric having a curved portion and having a fixed distance between the upper and lower fabrics is provided. Since the rubber layer is provided on the inner surface (and the outer surface) of the three-dimensional woven fabric and the surface of the connecting yarn, when the bag having the curved portion is manufactured, the height of the hollow portion is constant and the connecting yarn is formed. There is an advantage that a polymer bag having good strength can be produced.

[Brief description of the drawings]

FIG. 1 is a side view of a three-dimensional woven fabric according to the present invention having a curved portion.

FIG. 2 is an explanatory view illustrating a method for producing a three-dimensional woven fabric according to the present invention.

FIG. 3 is a diagram showing a structure of a three-dimensional woven fabric.

FIG. 4 is a cross-sectional view of an example of a product using a three-dimensional woven fabric.

FIG. 5 is a side view when a conventional three-dimensional woven fabric is curved.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper cloth 2 Lower cloth 3 Connecting thread 4 Rubber layer 5 Curved part 6 Linear part 7 Mold member 71 Curved part 72 Linear part

Claims (5)

[Claims] 1. A three-dimensional woven fabric having an upper cloth, a lower cloth, and a connecting thread for connecting the upper cloth and having a curved section, wherein the connecting thread of the curved section extends in a direction of a center of curvature of the curved section. The three-dimensional woven fabric is characterized in that a constant distance is provided between the upper cloth and the lower cloth. 2. A step of providing an upper cloth and a lower cloth on a facing surface of a mold member having a predetermined thickness and having a curved portion curved at a predetermined curvature, and passing a connecting thread in the direction of the center of curvature of the curved portion. ,
A method of manufacturing a three-dimensional woven fabric, comprising: a step of fixing the connection yarn to an upper cloth and a lower cloth; and a step of removing the mold member. 3. The method for producing a three-dimensional woven fabric according to claim 2, wherein the mold member is a polystyrene foam. 4. The method for manufacturing a three-dimensional woven fabric according to claim 2, wherein the connecting yarn is fixed to the upper cloth and the lower cloth by a sewing technique. 5. The method for producing a three-dimensional woven fabric according to claim 2, wherein the mold member is removed by melting or breaking.