JPH01236005A - Umbrella cloth and its manufacture - Google Patents

Abstract

PURPOSE:To eliminate the need for a hemming processing to prevent a fray and to improve a sewing work efficiency to join respective top corner parts of an umbrella cloth by cutting a warp fabric having a stitch construction in an approximately a regular polygon shape, making a line to connect the central part and respective top corners into folds, folding each in two, cutting the outer edge vicinity of each part folded in two diagonally, respectively, and sewing it. CONSTITUTION:As an original cloth for an umbrella cloth, a warp fabric T such as a tricot fabric is applied which has the stitch construction, in which an antifraying is executed to a cut hem, and has a close stitch density and a proper elasticity. A sewing umbrella K1 is sew-formed by swing respective long arms of proper sheets of cut pieces 2-2 formed by cutting the warp fabric T is cut in an isosceles triangle shape. For a single-sheet umbrella cloth K2, respective top corner parts of a cut piece 3 formed by cutting the warp fabric T in a regular polygon shape are cut in an approximately triangle shape, respectively, both cut hems of respective cut lines are sewn, and joining parts 5-5 are formed to respective top corner parts 4-4 so that a configuration can be made into a dish shape.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an umbrella fabric worn on an umbrella, a parasol, etc., and a method for manufacturing the same.

(Prior Art) In conventional sewn umbrella fabrics, which are formed by sewing together a plurality of triangular pieces of plain woven fabric for umbrella fabrics, the periphery of the cut pieces is sewn to prevent threads from fraying on the outer periphery of the fabric. Some of the edges had been sewn in advance. For example, Figure 8 (a)
As shown in the figure, both side edges f1. f
1 is rolled up and hemmed with a sewing machine, h is applied, and the plain weave fabric n with hem stitched on both sides f1 is stacked in multiple layers and cut to fit a triangular shape with a cutter, etc., and then, for example, Eight cut pieces S were sewn together so that the hem-sewn edges constituted the outer periphery to create an umbrella fabric. In addition, as shown in Fig. 8 (b), the plain weave fabric f for umbrella fabric is cut one by one with a heat cutter to form a cut piece S with the outer peripheral edge welded, and an appropriate number of pieces S are sewn together. The fabric was sewn together to create umbrella fabric. In addition,
As disclosed in Japanese Patent No. 9-13866, cuts are made in advance at each apex corner of a single-layer umbrella fabric cut piece cut into a regular polygonal shape, and the cuts are sewn by overlock stitching or the like. A single-layer umbrella fabric was created by applying hem stitching to the outer edge.

(Problems to be Solved by the Invention) When producing the above-mentioned sewn umbrella fabric, when stacking and cutting a large number of edge-stitched plain weave fabric openings, the thickness of both sides of the stacked stacked layers t increases. Both sides of the lever bulge locally, making cutting work difficult or impossible, which limits the number of umbrellas that can be stacked of the plain-woven fabric f for umbrella fabric, significantly reducing the production efficiency of the shredded pieces S and increasing costs. There are also problems in that even if the number of stacked sheets is limited, the cut shape becomes inaccurate, requiring a skilled worker.

In addition, when heat-cutting plain weave fabric for umbrella fabric, the fabric is cut one by one, which not only reduces productivity and increases costs, but also causes the heat-cut welded edges to become brittle over time and re-thread. There was a problem that fraying occurred.

Furthermore, in the case of single-layered umbrella fabrics, there is a problem in that it is complicated to apply hem stitching to the plain weave fabric for the umbrella fabric in order to prevent fraying of the outer periphery, and the process of sewing each top corner of the umbrella fabric individually. There was a problem that it became complicated.

An object of the present invention is to reduce the labor involved in creating an umbrella fabric and to improve the form in which the umbrella fabric is stretched.

(Means for Solving the Problems) The present invention provides a cut edge which is created by cutting a warp knitted fabric having an anti-raveling stitch structure and which is not subjected to hem stitching, or a decoration on the cut edge. The outline is an umbrella fabric whose outer periphery is formed by a decorative edge that has been subjected to a hem stitching process, and the above-mentioned warp knitted fabric is cut into a substantially regular polygonal shape, and the center part and each apex corner thereof are Fold each half in half using the line connecting the tip of the
The gist of this invention is a method of manufacturing an umbrella fabric in which the vicinity of the outer ends of the folded portions are cut diagonally and sewn together.

(Function) According to claim 1, by creating the umbrella fabric using a warp knitted fabric having a fray-prevention stitch structure, the elasticity of the umbrella fabric in each direction is made almost uniform, and the cut edges are prevented from fraying. Claim 2 is characterized by an edge stitching process carried out in advance to impart a locking effect to the umbrella fabric to prevent it from fraying, and in manufacturing a single-layer umbrella fabric, cutting for joining the top corners of the umbrella fabric. Processing and stitching are performed simultaneously to streamline the sewing work of each joint.

(Effect of the invention) According to claim 1, it is possible to equalize the unfolded form of the umbrella fabric over the entire surface, and there is no need to perform edge stitching to prevent the umbrella fabric from fraying. The periphery can be formed into any shape for diversification, and
The manufacturing process of the umbrella fabric can be simplified and streamlined to reduce production costs.

Moreover, according to claim 2, it is possible to reduce the number of man-hours required to work on the single-layered umbrella fabric, and to improve the work efficiency in the sewing step of joining each apex corner portion of the umbrella fabric.

(Example) Next, one embodiment of the present invention will be described with reference to the drawings.

The raw fabric used for umbrella fabric K is dyed in advance,
In addition, water repellent or waterproof finishing has been applied in advance to prevent rainwater from penetrating. Further, as the raw fabric for the umbrella fabric, a warp knitted fabric T such as a tricot knitted fabric having a stitch structure with cut edges to prevent fraying, a dense stitch density and appropriate stretchability is used. As shown in Figure 2, this warp-knitted fabric is knitted in such a way that each stitch knitted by each warp group intertwines with each stitch adjacent to its four circumferences, and this knitted fabric can be cut in any direction. The knitted structure prevents the cut edges from fraying, and the elastic behavior in all directions becomes almost uniform.

As shown in Fig. 1 (a), the sewn umbrella fabric 1 is made by cutting a warp knitted fabric T into an isosceles triangle shape and forming an appropriate number of pieces (for example, 8 pieces) of each length of the cut pieces 2 to 2. The warp knitted fabric T is sewn into a regular polygonal shape (for example, a regular octagonal shape) by sewing the sides together. Each apex corner of a regular polygonal cut piece 3 formed by cutting into an octagonal shape is cut into a substantially triangular shape, and both cut edges of each cut are sewn together to form a sheet umbrella fabric. In each apex corner part 4 to 4 of 2, there is a joint part 5 on the umbrella fabric so that the expanded form of 2 becomes a bowl shape.
~5 are formed.

In the above-mentioned sewn umbrella fabric 1 and single-layer umbrella fabric 2, the outer periphery is mainly formed by a cut edge 7 that is not subjected to hem stitching as shown in FIG. In order to enhance the decorative effect of 1°K2 on the fabric, edge stitching is applied to the cut edge 7 by overlock stitching or sewing ribbon tape. As shown in FIG. 3, a decorative edge 8 is formed on the outer peripheral edge of 2 as necessary.

1 for the sewn umbrella fabric and 2 for the single-layered umbrella fabric have ridge lines 1 connecting the center 9 and the tip 10 of each apex corner 4, respectively.
The ribs of the umbrella ribs are attached to the umbrella ribs 1, and when the umbrella ribs are expanded, they are each expanded into a substantially bowl shape.

In addition, the outer periphery of 1 for the sewn umbrella fabric and 2 for the single-layered umbrella fabric are shown in Figure 4 (A), (B), and (C).

As shown in (d), it may be formed into an outwardly convex curved shape, a wavy shape formed by connecting a large number of circular arcs, or the like.

Next, apply 1. to the above umbrella area. The method for manufacturing 2 will be explained below.

First, the original fabric 1 for umbrella fabric is a warp knitted fabric with a stitch structure that prevents fraying, and is dyed and water-repellent. Using knitted fabric T, many sheets of this original fabric 1 for umbrella fabric (
As shown in FIG. 5, the stacked layers 12 (for example, 100 sheets) are sequentially punched into a regular octagonal shape in the longitudinal direction by a press cutting machine, and stacked regular octagonal single-layer umbrella fabric cut pieces 3. The layers 14 to 14 are cut so that each cut piece 3 is substantially connected to each other through one vertex corner. Also,
The uncut portions between the stacked layers 14 of the cut pieces 3 for umbrella fabric are sequentially punched out into isosceles triangular shapes using a press cutting machine, and the stacked layers 13 of the cut pieces 2 for umbrella fabric are sewn into an isosceles triangular shape. - 13 are cut so that both apex corners of each pair of cut pieces 2 are butted against each other. Therefore, the stacked layer 14 in which a large number of single-layer cut umbrella fabric pieces 3 are stacked, and the stacked layer 13 in which a large number of sewn umbrella fabric fabric pieces 2 are stacked can be created simultaneously. Incidentally, as shown by imaginary lines in FIG. 5, the cut pieces 2 and 3 may be cut in a state in which cut pieces having different shapes of cut edges are mixed.

Next, the eight sewn umbrella fabric cut pieces 2 cut in the above method are sewn together via their respective long sides to create a regular polygonal sewn umbrella fabric 1.

In addition, each of the single-layer umbrella fabric cut pieces 3 is folded in two using the ridge line 11 connecting the center portion 9 and the tip 10 of each vertex portion as a crease, and each of the two-folded portions 15 are folded as shown in FIG. Using an overlock sewing machine with a knife that performs both cutting and overlock stitching at the same time, the cut edge is overlock stitched while cutting diagonally to the ridge line 11, and the scraps 16 are removed. 2 can be made of a one-piece umbrella fabric having a regular octagonal shape in plan view and having joints 5 at each apex corner 4.

Next, the operation and effects of the embodiment having the above configuration will be explained.

The above-mentioned stitched umbrella fabric 1 and single-layered umbrella fabric 2 are formed of the cut pieces 2.3 obtained by cutting the warp knitted bottom, so the umbrella fabric 1. The elastic properties of K1.2 have been improved, and the elastic behavior in all directions has become almost uniform, making both umbrella fabrics K1. When 2 is stretched out, the stretched shape can be made even over the entire surface, suppressing the occurrence of local sagging and wrinkles, and the cut edge 7 can be prevented from fraying. Place 1. on the umbrella fabric with the outer periphery of 2 unstitched. You can create 2 in the umbrella area and 1 in the umbrella area.
．． In addition to simplifying and streamlining the manufacturing process in step 2 and increasing productivity, it also improves productivity in the umbrella fabric. Since the outer peripheral edge of 2 can be left unsewn, the shape of the cut edge 7 can be changed to, for example, a wavy shape or a convex shape, and can be applied to the umbrella fabric in 1. We diversified the outline shape of 2, and added 1. to the umbrella area. 2 has the effect of enhancing the design effect.

Therefore, when manufacturing the sewn-together umbrella fabric 1 and the single-layered umbrella fabric 2, there is no need for the sewing work of performing hem stitching on the umbrella fabric 1 in advance, and a large number of umbrella fabrics 1 can be fabricated. The cut pieces 2.3 can be punched and cut in a stacked state, and the cutting work of the cut pieces 3 can be greatly streamlined to create umbrella fabric K1.
This has the effect of increasing production efficiency in item 2.

Also, 1. In manufacturing 2, since the structure is such that the uncut portion after cutting the cut piece 3 for the umbrella fabric is sewn to cut the cut piece 2 for the sewn umbrella fabric, from the original fabric 1 for the umbrella fabric. Effectively cut out and cut the two-sided cut piece 2゜3 [
It is possible to significantly reduce the amount of 1. to 2
This has the effect of improving material yield and reducing material costs.

Furthermore, when sewing the joint part 5 of 2 to the sheet-covered umbrella fabric, conventionally the joint part 5 was sewn in two steps: cutting the cut and sewing the edges of the cut. In contrast, in this example, the cutting process and the stitching process can be performed in one step, which has the effect of reducing the number of work steps when sewing the joint portion 5 and improving work efficiency.

[Brief explanation of the drawing]

Figures 1 to 7 show one embodiment of the present invention.
Figures (a) and (b) are plan views of the sewn umbrella fabric and single-layered umbrella fabric, Figure 2 is an enlarged plan view showing the stitch structure of the warp knitted fabric, and Figures 3 (a) and (b) are the umbrella fabrics. A plan view showing another embodiment of the ground, FIG. 4(A). (B), (C), and (D) are plan views showing the other sides of the sewn umbrella fabric and the one-piece umbrella fabric, respectively; Figure 5 is a plan view showing the method of cutting the cut pieces for umbrella fabric; and Figure 6. (A) and (B) are perspective views showing the stacked layers of single-layer umbrella fabric and the stacked layers of sewn umbrella fabric, respectively. FIGS. 8(A) and 8(B) are perspective views showing a conventional method of cutting a cut piece for umbrella fabric, respectively. 1... Raw fabric for umbrella fabric 2.3... Cut piece 4... Apex corner part 5... Joint part 7... Cut edge 8... Decorative edge 9... Center 10...・Tip of the apex corner 11...Ridge line 13.14...Stacked layer 15...Folded in half ■...1 on the warp knitted fabric. 2...Umbrella area

Claims (1)

[Claims] 1. A cut edge created by cutting a warp knitted fabric with an anti-raveling stitch structure and without hem stitching, or a decorative edge on this cut edge. An umbrella fabric characterized by having an outer peripheral edge formed by a decorative edge that has been subjected to a hem stitching process. 2. The light knitted fabric according to claim 1 is cut into a substantially regular polygonal shape, and each of the cut pieces is folded in two using a line connecting the center part and the tip of each apex corner as a crease, and each of the two folded parts is folded into two. A method for manufacturing umbrella fabric, which comprises cutting diagonally near the outer edges of the fabric and sewing the fabric.