Umbrella and method of manufacturing umbrella

Abstract

To provide an umbrella, the frilled part of which can assume a three-dimensional shape at a lower cost than in the prior art, without a loss of designability, and a method of manufacturing the umbrella.SOLUTION: An umbrella comprises a belt-like member 2 which is provided at an outer edge of an umbrella body fabric 1 and which has one long side provided with a rolled hem part 4a, and a core material 5 that is arranged in a part or the whole of the belt-like member 2. The other long side of the rolled hem part 4a of the belt-like member 2 is attached to the umbrella body fabric 1 in the state of gathered stitches 3.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a method for giving the frill portion of umbrella fabric a three-dimensional shape. [Background technology]

[0002] A conventional method for hemming fabric involves wrapping the outer edge of the fabric and providing a thread (a core material) by lock stitching (see, for example, Patent Document 1). [Prior art documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 61-222478 Summary of the Invention [Problem to be solved by the invention]

[0004] The configuration disclosed in Patent Document 1 has problems such as high costs and difficulty in processing due to the use of overlock stitching. In addition, the overlock stitching bulges and stands out, ruining the simple design, and the thickness of the overlock stitching may be suitable for clothing, but it can be an obstacle when folding an umbrella.

[0005] The present invention aims to solve the problems of the prior art described above, and to provide an umbrella and a method for manufacturing an umbrella that can give the frill part a three-dimensional shape at a lower cost than the prior art without sacrificing design. [Means for solving the problem]

[0006] As a result of research into solving the above-mentioned problems, we discovered that this could be solved by placing a flexible core material in the three-fold sewn part of the belt-shaped member used for the frill, and we were able to complete this invention.In other words, this invention comprises a belt-shaped member attached to the outer edge of the umbrella body fabric, with a three-fold sewn part on one long side, and a core material placed over part or the entirety of the three-fold sewn part of the belt-shaped member, and the other long side of the three-fold sewn part of the belt-shaped member is attached to the umbrella body fabric with a gathered stitch.

[0007] In another aspect, the present invention provides a method for manufacturing an umbrella, which includes the steps of three-fold stitching one long side of a belt-shaped member with a core material wrapped around it, three-fold stitching the other long side of the belt-shaped member, and gathering stitching the other long side of the belt-shaped member to the umbrella body fabric. [Effects of the Invention]

[0008] According to the umbrella and umbrella manufacturing method of the present invention configured as described above, it is possible to provide an umbrella with a three-dimensional frilled portion at a lower cost than conventional techniques without sacrificing design.

[0009] Furthermore, the placement of the interlining at the outer edge of the frill fabric can be easily performed, reducing the effort and cost required for the processing.

[0010] Furthermore, since the appearance of the three-fold stitched part at the outer edge of the frill with the interlining placed therein is the same as the appearance of the three-fold stitched part without the interlining placed therein, the three-fold stitched part with the interlining placed therein is not noticeable, and a simple design can be given to the frill fabric. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing an open state of an umbrella according to an embodiment of the present invention. [Figure 2] FIG. 1 is a partial front view of an umbrella according to an embodiment of the present invention. [Figure 3]1 is a plan view showing an apparatus for manufacturing an umbrella belt-shaped member according to an embodiment of the present invention. [Figure 4] FIG. 1 is a partial perspective view showing an enlarged view of a part of an apparatus for manufacturing a belt-shaped member of an umbrella according to an embodiment of the present invention. [Figure 5] 1 is a side view showing an apparatus for manufacturing a belt-shaped member of an umbrella according to an embodiment of the present invention. [Figure 6] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 7] FIG. 4 is a cross-sectional view taken along line BB in FIG. [Figure 8] FIG. 4 is a cross-sectional view taken along line CC in FIG. [Figure 9] FIG. 4 is a cross-sectional view taken along line DD in FIG. [Figure 10] FIG. 4 is a cross-sectional view taken along line EE in FIG. [Figure 11] FIG. 2 is a cross-sectional view of a belt-shaped member of an umbrella according to one embodiment of the present invention. [Figure 12] FIG. 1 is a partial front view showing an umbrella in a closed state according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a perspective view of an umbrella body 20 according to one embodiment of the present invention. FIG. 2 is a partial front view of an umbrella with an enlarged frill portion. FIG. 3 is a plan view of an apparatus 30 for manufacturing an umbrella strap 2, which attaches a core 5 to one long side of the strap 2 for the frill by three-fold stitching using a sewing machine 7. FIG. 4 is a partial perspective view of an enlarged portion of the apparatus 30 for manufacturing an umbrella strap 2. FIG. 5 is a side view of the apparatus 30 for manufacturing an umbrella strap 2 for the umbrella. FIG. 6 is a cross-sectional view taken along line A-A in FIG. 3. FIG. 7 is a cross-sectional view taken along line B-B in FIG. 3. FIG. 8 is a cross-sectional view taken along line C-C in FIG. 3. FIG. 9 is a cross-sectional view taken along line D-D in FIG. 3. FIG. 10 is a cross-sectional view taken along line E-E in FIG. 3. FIG. 11 is a partial cross-sectional view of a three-fold stitched portion 4 where a core 5 is placed around the outer edge of the strap 2 for the frill. FIG. 12 is a partial front view of the umbrella in a closed state.

[0013] As shown in Figures 1 and 2, the umbrella body 20 of this embodiment has a frill belt-shaped member 2 on the outer edge of the umbrella body fabric 1. The belt-shaped member 2 has three-fold sewn portions 4a and 4b on both long sides. A core material 5 is placed inside the three-fold sewn portion 4a on one long side of the belt-shaped member 2. Furthermore, the three-fold sewn portion 4b on the other long side of the belt-shaped member 2 is attached to the umbrella body fabric 1 with a gathered stitch 3.

[0014] The core material 5 is flexible and is placed over all or part of the three-fold sewn portion 4a. As will be described later, the core material 5 is placed around the entire periphery of the umbrella body fabric 1 inside the three-fold sewn portion 4a when sewing the three-fold sewn portion 4a of the belt-shaped member 2. By placing the core material 5 in this way, the frill belt-shaped member 2 can maintain its three-dimensional shape without sagging due to gravity.

[0015] Next, a method for manufacturing the belt-shaped member 2 will be described. As shown in FIG. 3, the manufacturing apparatus 30 for the belt-shaped member 2 includes a sewing machine 7 and a jig 6 mounted on a sewing table 8, a core winding 9 disposed outside the sewing table, a turntable 10, and a bar 11. The sewing machine 7 sews the three-fold sewn portions 4a and 4b. The jig 6 is an attachment composed of two plate-like members, one end of which is closed along the direction of arrangement of the core 5. This closed end 6b forms the spiral portion 6a. The spiral portion 6a has a spiral shape in which the number of turns gradually increases in the direction of sewing progress. As one long side of the belt-shaped member 2 passes through the jig 6, the number of turns gradually increases, deforming it into a three-fold shape. Furthermore, the jig 6 is installed on the sewing table 8 in a direction perpendicular to the direction of movement when forming the three-fold sewn portion 4a, and is fixed to the sewing table 8 so that its position can be adjusted. The turntable 10 is a supply source of the interlining 5 and rotatably holds the interlining roll 9 around which the interlining 5 is wound, as shown in Figure 4. As shown in Figure 5, the bar 11 is a rod-shaped member with a circular cross section that is located higher than the top of the jig 6 in a direction perpendicular to the direction of sewing progress, and is disposed in front of the sewing table 8 and parallel to the top surface of the sewing table 8. When the belt-shaped member 2 moves from the front of the sewing table 8 toward the jig 6 due to sewing, it passes over the top of the bar 11 with a circular cross section that is disposed parallel to the sewing table 8, eliminating twists and smoothing out wrinkles.

[0016] Furthermore, as the belt-shaped member 2 and core material 5 pass through the top of the aforementioned bar 11, the tension generated by the difference in height between the bar 11 and the jig 6 allows the core material 5 to remain adjacent to the long side of the belt-shaped member 2 within the closed end 6b of the jig 6 during the process of forming the three-fold sewn portion 4a described below.

[0017] The manufacturing device 30 for the belt-shaped member 2 having the above-described configuration feeds the belt-shaped member 2 from the front side of the sewing machine 7 to the rear side of the sewing machine 7 by sewing. As the belt-shaped member 2 moves, the core material spool 9 arranged on the turntable 10 rotates, thereby unwinding the core material 5. The method for forming the three-fold sewn portion 4a will be described below.

[0018] As shown in Figures 6, 7, and 8, the core 5 is placed at the closed end 6b between the two plate-like members of the jig 6, and one long side of the belt-shaped member 2 to be sewn with a sewing machine is placed adjacent to the core 5 placed at the closed end 6b. In this state, the belt-shaped member 2 and the core 5 are moved toward the sewing machine 7 inside the jig 6, which has a spiral portion 6a, by sewing with a sewing machine. As one long side of the belt-shaped member 2 moves along the spiral portion 6a inside the jig 6, it is formed into a spiral shape with gradually increasing windings, centered on the core 5 placed at the closed end 6b, which is the center of the spiral portion 6a.

[0019] 9, one long side of the belt-shaped member 2 with the core material 5 disposed therein after passing through the jig 6 is subjected to pressure from above by the presser foot 7a, and is fixed in a state in which the cross section is flat. As a result, the core material 5 is also fixed inside the belt-shaped member 2 without moving.

[0020] As shown in FIG. 10, the vicinity of the folded portion of the fixed belt-shaped member 2 is sewn with a sewing machine 7 to form a three-fold sewn portion 4a with a core material 5 disposed therein.

[0021] As shown in Figure 11, through the above steps, a core material 5 is placed inside the three-fold sewn portion 4a of the belt-shaped member 2 for the frill. Furthermore, a synthetic fiber commonly used for fishing line is suitable for the core material 5, and a diameter of approximately 0.5 mm can be used. The three-fold sewn portion 4b can be formed, for example, by using the same method as for the three-fold sewn portion 4a described above, but without using the core material 5.

[0022] The interlining 5 arranged on the frill belt-shaped member 2 is fixed in the small gap inside the three-fold sewn portion 4a, and will not easily come off due to the frictional force generated.

[0023] By attaching a core material 5 with moderate flexibility to the outer edge of the frill using the three-fold stitching described above, it is possible to achieve an umbrella that does not lose flexibility and does not have the outer edge of the frill get in the way of opening and closing the umbrella, compared to conventional technology where thread is wrapped around a core material placed on the outer edge of the frill and sewed, which tends to make the thickness thicker and larger.

[0024] As a result, as shown in Figure 12, even when the umbrella is closed, the frill strip 2 maintains a soft spread due to the moderate flexibility of the core material 5 with the three-fold stitching 4a inside. The three-fold stitching 4a, which forms the outer edge of the frill and has the core material 5 inside, looks no different from the three-fold stitching 4b on the other long side of the strip 2, giving the overall appearance a clean, simple design. For these reasons, this has become a new standard technique for decorating umbrella frills, and will serve as the foundation for the creation of many more variations on frill decorations in the future.

[0025] It should be noted that the present embodiment described above is merely an example and can be modified as desired within the scope of the present invention and its effects. For example, although the above example does not exemplify the material of the umbrella body fabric, any fabric, such as cloth, vinyl fabric, leather, or synthetic leather, can be used. Also, in the above example, the core material 5 is disposed over the entire three-fold stitched portion 4a, but it can also be disposed over only a portion of the three-fold stitched portion 4a. [Explanation of symbols]

[0026] 1. Umbrella body fabric 2. Belt-shaped member 3 Gathered stitching 4a, 4b Three-fold stitching 5 Core material 6 Three-roll sewing attachment (jig) 6a spiral part 6b Closed end 7. Sewing Machine 7a Press 8 sewing machine table 9 Core wrapping 10 Rotating Platform 11 Bar 20 Umbrella body 30 Manufacturing equipment

Claims

1. The umbrella is provided with a belt-shaped member provided on the outer edge of the umbrella body fabric, with a three-fold stitched portion on one long side, and a core material provided in part or the entirety of the three-fold stitched portion of the belt-shaped member, The other long side of the three-fold sewn portion of the belt-shaped member is attached to the outer edge of the umbrella body fabric by gathering stitching.

2. 2. The umbrella according to claim 1, wherein the core material is made of a flexible material.

3. a step of three-fold sewing one long side of the belt-shaped member with a core material wrapped around the inside, and a step of three-fold sewing the other long side of the belt-shaped member; The other long side of the belt-shaped member is gathered and sewn to the outer edge of the umbrella body fabric. A method for manufacturing an umbrella having the above structure.

4. The three-fold stitching on one long side of the belt-shaped member is performed using a spiral jig that is composed of two plate-shaped members, one end of which is closed along the arrangement direction of the core material, and has an axis in the arrangement direction of the core material with the closed end toward the center, and gradually increases the number of turns.The belt-shaped member is placed between the two plate-shaped members with one long side positioned at the closed end of the jig, and the core material is placed at the closed end to perform the three-fold stitching on one long side.This is the umbrella manufacturing method described in claim 3.

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