JPH0580742U - Bag hole reinforcement frame - Google Patents

Abstract

(57) [Summary] [Purpose] When attaching to the film at the rim of the bag, without attaching holes to the film in advance, a hole is formed in the film at the same time as attachment, or is easy to form. The holes in the reinforcing frame and the holes in the film can be perfectly aligned with each other. [Structure] An annular non-circular reinforcing frame 10 made of a thermoplastic molded product is formed with sharp ribs 13 projecting in the inner edge melting cross-section direction of a welding surface 11. When the reinforcing frame 10 is welded to the bag with the ribs, the film B1 of the bag B is cut at the same time, or a cut that can be cut is made.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flat annular reinforcing frame made of a thermoplastic molded product which is provided with a handle hole at the rim of a bag made of a thermoplastic film and reinforces the periphery of the handle hole.

[0002]

[Prior Art]

 Conventionally, this kind of reinforcing frame is attached to the vicinity of the rim of the bag, the reinforcing frame to be attached to the vicinity of the rim of the bag or the vicinity film which is the rim of the bag of the bag material band for manufacturing the bag. A hole corresponding to the shape and size of the inner edge of the above is bored, and then the reinforcing frames are overlapped with each other in accordance with the position of the hole, and these are heated and pressed for welding. However, it is extremely difficult to make the positions of the reinforcing frame and the handle hole completely coincide with each other, and a high level of skill is required for manual work. The cost is high and the efficiency is low. Allowing a slight misalignment can prevent a decrease in work efficiency, but the misalignment cannot be denied. Moreover, no matter which method is adopted, a step for forming a handle hole is required in advance, which increases the number of steps and makes the processing apparatus large.

[0003]

[Problems to be solved by the device]

 According to this invention, when the reinforcing frame is attached to the rim of the bag or other bag material band in the middle of bag making, the reinforcing frame is attached to the film material band by attaching the reinforcing frame without preliminarily piercing the bag. The purpose of the present invention is to provide the market with a reinforcing frame in which the film of the closed portion can be easily separated along the inner edge of the reinforcing frame.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is a non-circular annular flat frame made of a thermoplastic synthetic resin molded product, in which fine protrusions are distributed on one welding surface. A sharp rib protruding from the welding surface is integrally formed on the inner edge on the side.

Further, in order to achieve the above-mentioned object, the sharp rib of the handle hole reinforcing frame of the bag of the present invention has a sharp rib formed on at least the side of the inner edge on which the finger is hooked. It may be a feature.

In order to achieve the above object, a bag of the present invention may be characterized in that a sharp rib is formed all around the inner edge of the handle hole reinforcing frame.

[0007]

[Action]

 The reinforcing frame of the invention according to any one of claims 1 to 3, which is constructed as described above, is placed on the film to be attached such as a bag, and the heat sealer plate has a larger area than the reinforcing frame from the film side. On the other hand, the outer surface is pressed from the side of the reinforcing frame, and when the reinforcing frame is pressed against the heat sealer plate together with the film, the film is pressed by the surface of the heat sealer plate, part of which hits the sharp rib, and the film of this part The heat of the heat sealer softens or melts it and causes it to plastically deform, the film thickness becomes extremely thin and partly melts, and the part pressed by the welding surface is heated by the heat sealer to soften the film and reinforce the frame. The tips of the fine projections distributed on the welding surface of the film stick into the film, respectively, and the heat of the heat sealer fuses and integrates the projections with the film. When the heat sealer is separated from the film or the temperature is lowered when the heat sealer is of the impulse type, the film and the fine projections of the reinforcing frame are integrated and solidified. At this time, since the film surrounded by the reinforcing frame is thinned by the sharp ribs, the film is ruptured and separated from this part by a slight external force. Alternatively, after heat-sealing the film such as the bag and the reinforcing frame, if the film surrounded by the reinforcing frame is pressed by the knockout member in the direction of penetrating the film, the film is thin and brittle along the sharp rib. Since it has become solid, it is separated from this part and becomes scraps. Alternatively, in the device according to the second aspect, the film is separated or easily separated along at least the inner edge on the side on which the finger is hung in the above operation.

[0008]

【Example】

 Example 1 As shown in FIGS. 1 and 2, a reinforcing frame 10 made of a thermoplastic soft or semi-rigid injection-molded product, which has an annular non-circular shape as a whole plane shape, It is flat, and one surface thereof is the welding surface 11 and is included in a single flat surface. On this welding surface 10, a large number of small conical projections 12 are formed as a kind of many fine projections. There is. Reference numeral 13 is a sharp rib provided on the entire circumference of the inner edge of the reinforcing frame 10, and is provided so as to project from the welding surface 11. The protrusion size of the group of protrusions 12 near the welding surface 11 is about 0.1 to 0.5 mm, and the protrusion size of the ribs is the same as or slightly larger than this.

Embodiment 2 As shown in FIG. 3, the same reference numerals as those in Embodiment 1 indicate the same components. The difference is that the rib 13 is not provided around the entire inner edge of the reinforcing frame 10 and is provided only on the side 14 on which the finger is hooked.

Operation of Embodiments In order to attach these embodiments to, for example, the vicinity of the rim of the bag B, the mouth of the bag is slightly expanded, a heat sealer plate is inserted therein, and the reinforcement of the embodiment is applied from the outside of the bag. When a pair of plates 10 are supplied and pressed from the outside of the reinforcing frames 10, the welding surfaces 11 of the reinforcing frames 10 are respectively pressed against the film B1 of the bag B, and the sharp ribs 13 are pressed against the film B1 of the bag B. Thin and fragile shape. The tip of each of the plurality of projections 12 is pierced into the film B1, the tip is melted and integrated with the film B1, and the reinforcing frame 10 and the film are integrated.

[0011]

[Effect of the device]

 In the device of the present invention configured and acting as described above, when attaching the reinforcing frame to the bag or the film to be the bag, it is not necessary to previously make a handhold hole in these films. Therefore, if this is used, the number of mounting steps is reduced and the device is simplified. In particular, the handhole and the reinforcing frame are not misaligned at all, resulting in a good-looking attachment. Also, when used as a bag, the reinforcing frame and the holes in the film are not misaligned, and it feels good to put through your fingers.

Effects Unique to the Embodiment In the first embodiment, since the sharp ribs 13 are provided on the entire circumference of the inner edge, when the reinforcing frame is attached to the film, the film is fragile along the entire inner edge. If the knockout device or the user or the operator presses it with a finger, the film surrounded by this reinforcing frame will be completely cut along the entire inner edge and the film in this part will be removed. It becomes scrap. In the second embodiment, since the sharp rib 13 is provided on the inner circumference of the reinforcing frame 10 only on the side 14 on which the fingers are engaged, at least the film on the side on which the fingers are engaged is easy to cut or cut. It becomes a bag and is easy to use. In addition, since it does not become scrap, no scrap processing work is required.

[Brief description of drawings]

FIG. 1 is a perspective view showing a typical example of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line 2-2 of FIG.

FIG. 3 is an enlarged cross-sectional view of another embodiment.

FIG. 4 is a perspective view showing a state in which the bag is attached to the vicinity of the mouth edge portion.

[Explanation of symbols]

 10 Reinforcement Frame 11 Welding Surface 12 Protrusion 13 Sharp Rib

Claims (3)

[Scope of utility model registration request] 1. A non-circular annular flat frame made of a thermoplastic synthetic resin molded article, wherein fine projections are distributed on one side of the welding surface, wherein the welding surface is at the inner edge of the welding surface side. A bag hole reinforcing frame for a bag, characterized in that sharper ribs that are more protruded are integrally formed. 2. A sharp rib is formed on at least the side of the inner edge on which the finger rests.
Reinforcement frame for the bag hole of the bag described. 3. A bag handle reinforcing frame for a bag according to claim 1, wherein sharp ribs are formed on the entire circumference of the inner edge.