JPH09142486A - Manufacture of box type package from tubular fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily produce a box type package having the size of specified dimensions according to changes in shape of the package when the shape of the package is changed depending upon purpose and usage. SOLUTION: A bottom 2 of a tubular fabric 1 is sealed to form a bag with an opening on a side and the bag is opened to form a tubular shape. The corners of the bottom 2 are folded and both vertexes 3 of the corners of the bottom 2 are placed on joint points 6 on the seal line of the bottom 2 to form triangles 5 whose bases are the vertex folding bases on the sides of the tubular fabric. Two sides 7 that form the vertexes 3 are bonded on the tubular body to form a quadrangular bottom.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming a box-type package from a tubular woven fabric, and more specifically, by joining the bottoms of the tubular woven fabric to form a quadrilateral bottom surface, The present invention relates to a method of forming a box-type package.

[0002]

2. Description of the Related Art Conventionally, as a packaging body for transporting fiber raw materials such as hemp, cotton and wool, a box-shaped packaging body made of woven cloth or the like and having no lid has been used. As a method for manufacturing these box-type packages, as shown in FIG. 5, a continuous pentahedron having a shape suitable for the purpose is cut from one surface of the base cloth, and the four edges are sewn. Often, in such a forming method, when the packaging body has various shapes depending on the application, it is necessary to deform the pentahedron to be cut from the base cloth each time, in addition to the complexity of cutting change, There was a problem that the utilization efficiency of cutting the pentahedron from the base cloth also varied. Further, since the work of sewing the cut pentahedron is also performed in accordance with the changed shape, workability is poor and the precision of the finish is poor.

[0003]

DISCLOSURE OF THE INVENTION The present invention forms a box-shaped package from a tubular woven cloth which allows the box-shaped package to be manufactured easily even if the shape of the package is changed depending on the application. The purpose is to provide a method of doing.

[0004]

A method of forming a box-type package of the present invention is a method of solving the above-mentioned problems by using a tubular woven cloth and subjecting the bottom side to a specific process. That is, the bottom side of the tubular woven fabric is joined to form a bag body with the other side opened, the bag body is opened into a tubular shape, and the vertices of both corners of the bottom side are folded so as to overlap with the joining line of the bottom side. Form a triangle with the vertex and the folding base on the periphery of the tubular woven fabric as the base, and join the two sides sandwiching the vertex of the triangle to the tubular body to form the bottom of the quadrangle. The gist is a method of forming a box-shaped package from a tubular woven fabric, which is characterized in that.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A method for forming a box-type package of the present invention will be described step by step with reference to the drawings.

The tubular woven fabric 1 is obtained by cutting a tubular raw material continuously woven by a circular loom using natural fibers or synthetic fibers into a predetermined length so that one side is opened. The other opening edge is joined to form the bottom 2 of the bag (FIG. 1).

By folding the vertices 3 at both corners of the bottom 2 to the outside of the bottom and taking the bottom 4 in the cylindrical circumferential direction, the fold bases on the periphery of the vertex 3 and the tubular woven cloth are the bottom 4. To form a triangle 5 (FIG. 2).

The apex 3 of the triangle 5 is connected to the base 2 on the joining line side.
By folding so as to be located at an arbitrary point above, the joint portion 6 is formed, and then the two sides 7 sandwiching the apex 3 of the triangle 5 are joined to the tubular body, whereby the length of the bottom side 4 is formed. A box-shaped package having two sides of the bottom surface of the box shape, and a quadrilateral bottom having two circumferences of the circumference of the tubular woven fabric 1 minus the other sides is formed. It is possible (Fig. 3).

In the above means, the two sides 7 sandwiching the apex 3 of the formed triangle 5 are joined to the cylindrical body to fix the shape of the triangle 5 to form the quadrilateral bottom. , In this case, the triangle 5 is composed of two upper and lower woven fabrics.
In order to more firmly fix the above, it is preferable to join two upper and lower woven cloths at the bottom side 4 of the triangle 5 or to join two upper and lower woven cloths over the entire surface of the triangle 5 ( (Fig. 4).

When the box-shaped package is formed by such a method, the shape of the triangle 5 is expanded or reduced by moving the position of the apex 3 on the joining line (base 2), and the length of the base is reduced. By changing, the shape of the bottom face quadrilateral can be deformed.

The term "joining" as used herein may be any method such as stitching with a thread, adhesion with an adhesive, and heat welding. For sewing, a commonly used sewing method using a sewing machine or the like can be adopted. Adhesion using an adhesive is not particularly limited, but known adhesives of resin such as polyurethane, polyacryl, epoxy, or rubber such as chloroprene or nitrile can be used. Further, when the woven cloth is made of a thermoplastic resin, the heat welding method can be used.

Examples of the thermoplastic resin include high-density polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyester, polyamide and polyvinyl alcohol. Of these, high-density polyethylene and polypropylene are preferable in terms of low cost and stable quality in continuous production.

When the woven fabric is composed of a composite fiber of a high melting point component and a low melting point component, the heat welding method is particularly preferable.

[0014]

【Example】

Example 1 A polypropylene flat yarn having a fineness of 1,000dr was woven using a circular room to woven a tubular woven fabric having a folding density of 200 cm at a density of 10 × 10 / inch and a length of 100 cm. After cutting, the bottom 2 of the tubular woven fabric 1 was sewn with a sewing machine to form a bag. 40 from the tops 3 at both ends of the base 2 upward along the tubular body
At the point of cm, take a 40 cm bottom 4 on the cylinder in the circumferential direction,
A triangle 5 with the apex 3 was formed, the apex 3 was folded toward the joining line side of the base 2, and the apex 3 was sewn and bonded (joint point 6). Then, of the three sides forming the triangle 5, two sides 7 sandwiching the apex 3 were sewn to a tubular body by a sewing machine to obtain a box-shaped package having a bottom portion of a rectangular shape of 40 cm × 60 cm.

Example 2 A box-shaped package having the same shape and size was obtained in the same manner as in Example 1 except that the base 4 of the triangle 5 was sewn with a sewing machine.

[0016]

The method of forming a box-shaped package from the tubular woven fabric of the present invention is a trigonal shape formed by the apex and the peripheral length of the tubular body even when the shape of the packaging object is changed. This is an effective method that can easily change the shape of the square bottom by significantly changing the shape, and can greatly improve the utilization efficiency of the base cloth and work efficiency.

[Brief description of the drawings]

FIG. 1 shows a state in which a bottom of a tubular woven fabric is joined and another side is opened to form a bag.

FIG. 2 shows a state in which a triangle is formed by apexes of both corners of the bottom side and a folding base end around the tubular woven fabric.

FIG. 3 shows a state in which a triangle is superposed on a joining line and two sides sandwiching a vertex are joined.

FIG. 4 shows a state in which two sides sandwiching a vertex of a triangle are joined to a bottom side.

FIG. 5 shows an example of a conventional method of cutting a pentahedron and stitching ridges.

[Explanation of symbols]

 1 Cylindrical woven cloth 2 Bottom of bag 3 Vertex 4 Base of triangle 5 Triangle 6 Joint 7 Two sides sandwiching vertex 8 Ridge seam AK Khedron of conventional method

Claims (1)

[Claims] 1. A tubular woven cloth is joined to the bottom side to form a bag body having the other side opened, and the bag body is cylindrically opened so that the tops of both corners of the bottom side are superposed on the joining line of the bottom side. The bottom of the quadrangle is formed by joining the two sides that sandwich the apex of the triangle to the tubular body by forming a triangle with the apex and the folding base end on the periphery of the tubular woven fabric as the base. A method of forming a box-shaped package from a tubular woven fabric, the method comprising: