JPS6235400Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention is a carry bag whose both ends are hooked to the through hole for attaching a string at the upper end of the carry bag, and which is made by twisting together a plurality of strands made by untwisting or lightly twisting a stretched synthetic resin film. This invention relates to improvements in a synthetic resin film handle. As for the above-mentioned synthetic resin film handle,
Three-strike ropes are generally used, which are made by stretching a polyolefin-based synthetic resin film to form a rope yarn, gently twisting it into a strand, and then gently twisting the three strands into a Z-twist. This is because the synthetic resin string constructed in this manner is highly flexible, easy to crush by hand, and has extremely high tensile strength. In most cases, this type of handle is attached to the bag by making a knot at the tip, but this knot has the disadvantage that it is bulky when storing the bag, and the method using a knot cannot be mechanized,
In factories that produce tens of millions of bags per month, this requires an enormous number of man-hours, which is also a cause of high costs. On the other hand, many handles that do not use this knotting method have been introduced in which both the string part and the hook part are made of synthetic resin molded products by injection molding or the like (for example, Utility Model Publication No. 39-3842, Jitsukō 41-18388
No., Utility Model Application No. 48-56218, Utility Model Application No. 49-1315, Utility Model Application No. 54-146610, etc.). However, compared to the above-mentioned film handles, handles made of these synthetic resin molded products are more expensive to mold, including material and mold costs, and the string part that is held by hand is less flexible. In particular, it cannot be crushed in the hand, and when carrying heavy loads, it feels like it digs into the palm of the hand, and the texture is extremely poor. In addition, there are also known handles in which a synthetic resin molded product or a wooden stopper is connected to the end of a rope-like string made of twisted various materials (for example, in 1973-
20814). However, in this type of handle, the stopper is a separate member that is different from the rope-like string, so it must be molded in a separate process, and furthermore, the connection between the string and the stopper is not suitable for automation, and the processing Wages are high, production management is complicated, and overall costs are extremely high. For this reason, the mainstream of carriers for carrying bags is still the rope knot type made of synthetic resin film. This invention solves all of the above-mentioned drawbacks of the conventional holder.It is easy to mass-produce using a continuous automatic manufacturing method without tying the hole-hanging part of the string, and is therefore low-cost and extremely strong. The purpose of the present invention is to provide a handle for a carry-on bag having an excellent hooking part. Next, embodiments of the present invention will be described based on the drawings. 1 to 4 show an embodiment of the present invention. The string body 1 is the one used for ordinary paper carrying bags 2, and is made by appropriately twisting stretched polypropylene film rope yarn to form a strand 3, and then gently twisting the three strands into a Z-twist and twisting it in the appropriate place. It is a three-stroke rope with a thickness of about 8 mm that is lightly heat-welded and joined together. Such a string main body 1 is formed by loosely twisting and converging a very thin and soft polypropylene film, and also loosely twisting the strands 3 together, so that by squeezing and crushing it with your hands, you can loosen its thickness. It has flexibility and elasticity that allows it to be crushed down to a minimum size of about 1 mm. Hanging pieces 5, 5 are welded to both ends 4, 4 of this string main body 1 in a "T" shape, forming a string hanging part 6. The hooking piece 5 is obtained by cutting a stiff rope 11 made of the same material as the string body 1, that is, a normal three-stripe rope 10, into a predetermined length by heat-compressing it. One manufacturing example is as follows. That is, by using a normal coated cord manufacturing equipment and an automatic winding machine in combination, a normal three-strike rope 10 is used in the coated cord manufacturing equipment: Coating nozzle diameter: φ4 mm Nozzle temperature: 500 to 700°C Pulling speed: 35 to 50 m/min It is obtained by thermal compression treatment under the following conditions and continuous winding.

[Table] The tests in Table 1 were conducted in accordance with JIS L1096, and the values are for one sample under the conditions of initial load: 50 g/cm ² load: 300 g/cm ² . As is clear from Table 1, the normal rope 10
It can be seen that the rope 11 has been transformed into a strong and stiff rope 11 by the heat compression treatment. The present invention is characterized in that a synthetic resin film rope 11 having physical properties as shown in Table 1 is cut into a predetermined length and used as a hanging piece. Furthermore, rope 1
1 is preferably a three-twisted one, but even if it is untwisted (untwisted), the same physical properties as a three-twisted one can be obtained depending on the conditions of the thermal compression treatment. As shown in FIG.
The size is such that the string attachment hole 7 of the bag 2 can be passed through the bag 2 in a state where the string body 1 and the string body 1 are overlapped in the longitudinal direction. Further, as shown in FIG. 3, even if the hooking piece 5 passes through the hole 7 and pulls the string body 1 outside the bag 2, the length l will be caught and the hole 7 will no longer be held. It is long enough (usually 2 to 4 cm) that it cannot escape. The central portion in the longitudinal direction of the hooking piece 5 and the cut end portion 4 of the string body 1 are firmly adhered by heat welding to form a “T”-shaped string hooking portion 6.
Note that it is preferable that the welded portion be welded while being crimped so that it becomes as small a lump as possible. Additionally, the two may be joined by ultrasonic welding, but
Heat welding is more preferable because it has higher welding strength, is easier to operate, has less variation in welding strength, and has stable quality. In this way, the string hooking part 6 has a very high fixing strength, together with the fact that the polypropylene films are welded together, and it rarely comes off.
Furthermore, since the latch piece 5 itself is constructed to be strong, even if the bag 2 is filled with a large amount of items, the latch piece 5 will never slip out of the hole 7 due to its weight. FIG. 6 is a diagram illustrating a method of manufacturing the handle according to the above embodiment. Two ropes 11, 11 for hanging pieces are arranged in parallel at a predetermined interval, and these ropes 11, 11
In between, the string bodies 1, 1 cut to a predetermined size are lined up at right angles at regular intervals, and stretched over just like a ladder, and the two ropes 11, 11 and both ends 4, 4 of each string body 1, 1 are connected. By thermally welding the overlapping parts of the ropes 11, 11 at various intervals, and simultaneously cutting the ropes 11, 11 for the hanging pieces at various intervals on the center line of each interval between the string bodies 1, 1, the handle according to the embodiment of the present invention can be removed at once. can be mass produced. Next, Table 2 shows the strength test results of the hanging part of the handle according to the embodiment of the present invention and the conventional knot. The test item is a yarn strength and elongation test (Instron method), and the test method is as follows: Tensile speed: 10 cm/min Grip interval: 4 cm Test 1: Average strength of a knot or joint coming out of a cardboard with a hole of 7 mm in diameter. (Kg). Test 2: The average strength (in kg) at which a knot or joint will pull out or break from a plastic plate with a 7 mm diameter hole. Moreover, the numerical value of average strength (Kg) in Table 2 shows the average strength of the test results of 5 to 6 pieces for each sample. On the other hand, all the samples were composed of three-strand ropes made of polypropylene film, and the sample length was 4 cm.

[Table] From the test results in Table 2, it can be seen that the strength of the string hooking part is much greater in the embodiment of the present invention than in the conventional knotting method. Further, when comparing the embodiments of the present invention, it can be seen that the thermal welding bonding is stronger than the ultrasonic bonding. As described above, according to the handle of the present invention, the following excellent effects can be obtained from both the manufacturing and sales perspectives. From raw materials to final products with hanging pieces (handles)
Consistent continuous automatic production is now possible. Of course,
Manufacturers of synthetic resin film ropes can easily use their own materials, production equipment, and production technology (welding technology, fusing technology, etc.) to produce large quantities, and bag manufacturers It can be supplied as an inexpensive carry-on bag holder with a hanging piece. That is, compared to the length of the conventional cut rope for knotting (about 45 cm), the length of the string main body 1 according to the present invention is about 30% shorter (about 32 cm). Therefore,
Since the cost of the cut rope is reduced, it is possible to deliver the handle of the present invention to which the hooking piece is welded to bag manufacturers at almost the same price as the unit price of the conventional cut rope before the knot is formed. On the other hand, from the perspective of bag manufacturers who had previously purchased Katsutrope and performed knotting operations, it is possible to save half of the processing process and reduce production management costs.
You can save 2/3. In other words, there is no need for any subcontractor for the conventional knotting work. This not only makes it possible to completely rationalize subcontract processing fees, but also eliminates the need for a subcontract management department. Furthermore, since manufacturing is centralized on the rope manufacturer's side, it is possible to simplify arrangements, ensure thorough care, and standardize products. That is, since it is a self-control system, there is no need to worry about inferior products, sloppy work, or variations in knot shape (individual differences such as large, small, thick, thin, etc.), making quality control easier. In addition, speeding up production and processing will shorten delivery times. However, the handle of this invention does not cause any uneven length when attached to the bag, has a good appearance at the attachment point, and has a very clean appearance, so it is well received by end users. . In addition, when the carrier bags are stacked, the hanging pieces are not as bulky as the knots, so the stacking is stable and transportation, storage management, etc. are facilitated. It also has the effect of saving space when displayed in stores. Furthermore, as is clear from the above test results, the tensile strength is improved by more than 10% compared to the knotted ball method. Furthermore, compared to plastic molded products, the handle of the present invention can be manufactured at 1/3 the cost. However, if the hanging piece is made of a plastic molded product with respect to the string body made of polypropylene film, it is not easy to join the two together.
On the other hand, in the present invention, the main body of the strap and the hanging piece are both made of plastic film, so joining is easy especially if they are made of the same material, and the joint strength is also the same as that of the above-mentioned molded product and plastic film. It is stronger than the bond of On the other hand, molded products have the disadvantage that they are less comfortable with human hands than film strings.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, with Figure 1 being a perspective view of the main parts thereof, and Figure 2 being a perspective view of the main parts thereof.
The figure is a perspective view showing the state of use, and Figure 3 is the second
FIG. 4 is an enlarged view of the main part of the figure, and is a view showing the operation of passing the main part through the string hole of the bag. FIG. 5a is a diagram comparing the rope 11 for the hooking piece with a rope 10 made of an ordinary synthetic resin film, and FIG. 5b is a comparison diagram of the cross sections thereof. Also the 6th
The figure is a diagram illustrating an embodiment of the manufacturing method of the handle according to the present invention. 1... String body, 2... Carrying bag, 5... Hanging piece, 6... String hanging part.

Claims (1)

[Claims for Utility Model Registration] 1. A string body made of synthetic resin film loosely twisted together, and an elongated hanging piece made by firmly fixing the synthetic resin film rope and cutting it into a predetermined length. For a handbag bag, the cut portions of both ends of the string body are welded to the central portion in the longitudinal direction of the hooking piece, and a “T”-shaped string hooking portion is formed at each end of the string body. The carrying hand. 2. A handle for a carrying bag according to claim 1 of the registered utility model, characterized in that the fixing treatment of the rope for the hanging piece is a heat compression treatment. 3. A handle for a carrying bag according to claim 1, wherein the end of the string body and the center of the hanging piece are welded together by heat welding. 4. A handle for a carrying bag according to claim 1, wherein the string body and the hook are both made of the same synthetic resin film.