JP3163293B2 - Manufacturing method of a simple circular knitting bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a simple circular knitted bag, and more particularly, to a simple circular knitted bag capable of efficiently mass-producing an inexpensive and durable simple circular knitted bag having no sewing area. It relates to a manufacturing method.

[0002]

2. Description of the Related Art Recently, a simple knitted bag made of a knitted fabric is frequently used as a draining garbage bag for a sink in a cooking place, a kitchen or the like. This simple knitted bag is much more excellent in drainage than a conventional garbage bag made of a synthetic resin film having a large number of open pores. Since it can be easily mounted on a triangular corner (so-called triangular corner) and can be made from recycled fibers, it is convenient for effective use of resources.

[0003] However, the conventional knitted fabric bag must be subjected to a troublesome sewing process for joining the bottom or side of the bag at the time of bag making, and this sewing work increases the production cost of the knitted fabric bag. Had become.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks in the conventional method of manufacturing a knitted fabric bag, and has no sewing parts at all, and is inexpensive, durable and simple. An object of the present invention is to provide a manufacturing method capable of efficiently mass-producing circular knitted bags.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned technical problems, the present invention provides a bag body 1 made of a cylindrical circular knitted fabric, and a bag in which the ends of the bag body 1 are joined. A method for manufacturing a circular knitted bag comprising a bottom portion 2, comprising knitting a cylindrical circular knitted fabric F having ear tissues S at both ends, and forming the cylindrical circular knitted fabric F
Locally converging the site to form the bag bottom in the longitudinal direction of, and applying a welding tape T to the converging site,
The welding tape T is heated and welded to weld and fix the fabrics of the circular knitted fabric F at the corresponding portions. Thereafter, the welded fixing portion is cut to divide the circular knitted fabric F into two parts, thereby forming the bag bottom 2. It adopted the technical means that you manufacture a simple circular knitting bag with.

In order to solve the above-mentioned technical problems, the present invention comprises a bag body 1 made of a cylindrical circular knitted fabric and a bag bottom 2 to which the end of the bag body 1 is joined. A plurality of cylindrical circular knitted fabrics FF having ear structures S at both ends are knitted to form a bag bottom in the longitudinal direction of each circular knitted fabric F. The convergence site of each circular knitted fabric F is sandwiched between a pair of upper and lower welding tapes TT so as to be locally converged, and the pair of welding tapes T are wrapped around the plurality of circular knitted fabrics FF. T is heated and welded, so that the doughs at the converging portions of the respective circular knitted fabrics F sandwiched between the welding tapes T are welded and fixed to each other. Is divided into two parts, and the ears that remain between the circular knitted fabrics F and F
By truncating the-loop T ', in that employing the technical means that you produce easy <br/> easily circular knitting bag having Fukurosoko 2
There are features .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention will be described below in detail with reference to an embodiment illustrated in the accompanying drawings (hereinafter, referred to as the present embodiment). FIG. 1 is an overall perspective view of a circular knitted fabric knitted in manufacturing the simple circular knitted bag of the present embodiment, and FIG. 2 is a welding tape in manufacturing the simple circular knitted bag of the present embodiment.
FIG. 3 is an explanatory view showing an arrangement process, and FIG. 3 is a schematic side view of a manufacturing apparatus used in the method.

[0008] The method for producing a simple circular knitted bag of the present embodiment is as follows.
First, a cylindrical circular knitted fabric F having ear structures S at both ends is knitted by using a well-known circular knitting machine (see FIG. 1). The circular knitted fabric F of this embodiment is made of polyethylene terephthalate yarn (20
(Denier) is knitted in a flat knitting structure and configured to be stretchable, and polyurethane elastic yarn (20 denier) is inserted and knitted in the ear tissues SS at both ends thereof so as to be freely expandable and contractable.

[0009] The circular knitted fabric F thus knitted is shown in FIG.
, A plurality of circular knitted fabrics FF are arranged at a predetermined interval, and a plurality of folds are formed in a middle part of the circular knitted fabric FF where a bag bottom is to be formed, while locally converging the circular knitted fabrics. The front and rear surfaces are filled with a pair of welding tapes TT.

In this embodiment, as shown in FIG. 3, while a plurality of circular knitted fabrics F, F, Each circular knitting is performed by filling the both sides with a pair of welding tapes T, which are wound around the respective reels 4, and passing the circular knitted fabric F between the pair of upper and lower pressing endless belts 5, 5. The central portion of the fabric F is continuously sandwiched between a pair of welding tapes TT. In the present embodiment,
Welding tape T width 10mm, thickness 0.2mm, welding temperature about 16
A low-density polyethylene tape at 0 ° C is used.

Next, the pair of upper and lower welding tapes T.
T is heated and melted, and the melted tape is cooled and solidified while surrounding the constituent yarns of the circular knitted fabric F, so that the center of each circular knitted fabric F sandwiched between the welded tapes T and T Weld and fix the fabrics at the site. In the present embodiment, as shown in FIG. 3, two pairs of upper and lower heaters 6, 6 are sandwiched between the pressing endless belts 5, 5.
.. Heat the upper and lower welding tapes TT, and are cooled by a pair of upper and lower cooling plates 7 on the downstream side of the conveyance.

Thereafter, the central portion (indicated by a broken line in FIG. 2) of the welding fixing portion by the welding tape T is cut in the longitudinal direction to divide each circular knitted fabric F into two, and the circular knitted fabric F
And F, the remaining discarding tape T 'is cut off to form a bag body 1 made of a cylindrical circular knitted fabric, and a bag bottom 2 formed by welding and fixing the end of the bag body 1 with a welding tape. Thus, a simple circular knitted bag composed of the following is manufactured. Note that FIG.
In the present embodiment using the above-described device, each circular knitted fabric F
While conveying F ... on the work conveyor 3, the vertical cutter 8
The welding fixing part (FIG. 2)
The portion indicated by the broken line in the middle) is cut up and down, and then the cut-away tape T 'is cut off by the cross-cutting cutter 9 so that a simple circular knitted bag is continuously manufactured.

As described above, in the method for manufacturing a simple circular knitted bag according to the present embodiment, since the circular knitted fabrics F are welded and fixed to each other with the welding tape to form the bag bottom portion 2, a conventional bag is formed. The bag can be easily manufactured without any troublesome sewing processing like a knitted fabric garbage bag, and an extremely inexpensive simple circular knit bag can be provided.

[0014] Further, since the welding fixing portion using the welding tape is solidified in a state of surrounding the constituent yarns of the circular knitted fabric F, the fabric at the end of the circular knitted fabric can be securely fixed. It is possible to manufacture an extremely durable simple circular knitted bag that does not easily have a conductive line on the bottom portion 2.

Furthermore, in the method for manufacturing a simple circular knitted bag according to the present embodiment, the circular knitted fabrics F are welded and fixed with the welding tape T, and then cut. Since two simple circular knitted bags can be simultaneously manufactured from the circular knitted fabric F having the ear tissue S at both ends, the simple circular knitted bags can be efficiently mass-produced, and the productivity is improved and the simplified Circular knitted bags can be offered at very low cost.

Although the embodiment, which is a specific example of the present invention, is generally configured as described above, the present invention is not limited to this embodiment, and various modifications may be made within the description of the appended claims. Changes are possible.

[0017]

As described above in the embodiment, in the method of the present invention, the circular knitted fabrics are welded and fixed to each other with a welding tape to form the bag bottom. The bag can be easily made without any troublesome sewing processing like a bag, and a simple circular knit bag can be manufactured at extremely low cost.

Further, since the welding fixing portion using the welding tape is solidified in a state surrounding the constituent yarns of the circular knitted fabric, the fabric at the end of the circular knitted fabric is securely fixed, and the wire is connected to the bottom of the bag. A very durable simple circular knitted bag can be provided without occurrence of cracks.

Furthermore, in the method of the present invention, the circular knitted fabrics are welded and fixed with a welding tape and then cut, so that the cutting process is simple and the circular knitted fabric having ear structures at both ends is simultaneously cut. Since two simple circular knitted bags can be manufactured, the simple circular knitted bags can be efficiently mass-produced, the productivity is improved, and the simple circular knitted bags can be provided at very low cost.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a circular knitted fabric used in a method for manufacturing a simple circular knitted bag according to the present embodiment.

FIG. 2 is an explanatory view showing a process of disposing a welding tape in the production of a simple circular knitted bag according to the embodiment.

FIG. 3 is a schematic side view of a manufacturing apparatus used in the method of the embodiment.

[Explanation of symbols]

 F Circular knitted fabric S Ear tissue T Welding tape 1 Bag body 2 Bag bottom

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B65D 30/00-30/22 B65F 1/00 102 D04B 1/00

Claims (2)

(57) [Claims] 1. A method for producing a circular knitted bag comprising a bag body 1 made of a cylindrical circular knitted fabric and a bag bottom 2 joined to an end of the bag body 1, wherein ears are provided at both ends. A tubular circular knitted fabric F having a structure S is knitted, a portion of the tubular circular knitted fabric F where a bag bottom is to be formed in the longitudinal direction is locally converged, and a welding tape T is applied to the converged portion. Then, the welding tape T is heated and welded to weld and fix the fabrics at the corresponding portions of the circular knitted fabric F. After that, the welded fixing portion is cut to divide the circular knitted fabric F into two parts, thereby forming a bag. A method for producing a simple circular knitted bag, comprising producing a simple circular knitted bag having a bottom 2. 2. A method for manufacturing a circular knitted bag comprising a bag body 1 made of a cylindrical circular knitted fabric and a bag bottom 2 joined to an end of the bag body 1, wherein ears are provided at both ends. A plurality of cylindrical circular knitted fabrics FF having a structure S
.. Are knitted to locally converge the portion of the circular knitted fabric F where the bag bottom is to be formed in the longitudinal direction, and a plurality of circular knitted fabrics FF are formed.
The convergence site of each circular knitted fabric F is sandwiched between a pair of upper and lower welding tapes T and T, respectively, and the pair of welding tapes T and T are heated and welded so as to be sandwiched between the welding tapes T and T. The doughs at the converging portion of the circular knitted fabric F are welded and fixed, and then, this welded fixing portion is cut to divide each of the circular knitted fabrics F into two parts, and between the circular knitted fabrics F and F. Series
By cutting off the remaining disposable tape T ' , the bag bottom 2
Manufacturing method of a simple circular knitting bag features that you manufacture a simple circular knitting bag with.