JPH0587380B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is made of a synthetic resin sheet material, and the synthetic resin sheet material is used to close an opening in a tape passage portion formed at the periphery of the opening. The present invention relates to a tape welding device for a bag making machine that manufactures bags (commonly known as fin bags) with a handle passed through them.

(Prior Art) Conventionally, an opening 11 is formed of a synthetic resin sheet material S as shown in FIGS.
A bag body 10 having a handle 13 made of a synthetic resin tape material T for closing the bag is widely known. In the case of this bag 10, a synthetic resin tape material T serving as a handle 13 is passed through a tape passing portion 12 formed into a bag shape by folding both ends of a synthetic resin sheet material S folded in half. has been done.
Then, this synthetic resin tape material T is welded to the outside of both ends of the tape threading part 12, and also by being welded to the side of the tape threading part 12 at the same time when welding the sides of the bag body 10, It is fixed to the bag body 10, and is mainly welded to the outside of both ends of the tape passage part 12, so that
It is fixed to the bag body 10.

(Problems to be Solved by the Invention) However, in the conventional bag 10, the adhesion between the bag 10 and the synthetic resin tape material T is insufficient, and therefore books, etc. When a relatively heavy object was put in the bag, when holding the synthetic resin tape material T that became the handle 13, the synthetic resin tape material T could be torn to pieces from the bag body 10, as shown in FIG. 17. .

In order to firmly fix the bag body 10 and the synthetic resin tape material T so that the synthetic resin tape material T does not tear from the bag body 10, the tape passing portion 12 is used.
It is possible to lengthen the welding time or raise the welding temperature when welding the synthetic resin tape material T, but if the welding time is too long or the welding temperature is too high, the tape will not pass through. There have been problems in that the portion 12 has curled up or has holes, which detracts from the aesthetic appearance of the bag body 10.

The present invention was made in view of the above-mentioned circumstances, and its purpose is to firmly adhere the bag body and the synthetic resin tape material serving as the handle without impairing the aesthetic appearance of the bag body. An object of the present invention is to provide a tape welding device for a bag making machine that can perform the following steps.

(Means for Solving the Problems) In order to solve the above problems, the means taken by the present invention are described with reference numerals used in the drawings. Opening 1
In a bag making machine 1 that manufactures a bag body 10 in which a handle 13 made of a synthetic resin tape material T for closing an opening 11 is passed through a tape threading part 12 formed on one periphery, the tape threading part 12 A tape welding device for fixing the synthetic resin tape material T to a part of the synthetic resin tape material T and the tape passing portion 1.
2, a first tape welding means 20 for welding the synthetic resin tape material T and a part of the outside of the tape member 1;
A tape welding device 40 for a bag making machine 1 characterized in that it is equipped with a second tape welding means 30 for welding a part of the inner side of the bag making machine 1.

In other words, the bag 10 and the synthetic resin tape T are welded only on the outside of the tape passage 12, as in the past, so that the bag 10 and the synthetic resin tape T forming the handle 13 are firmly attached. Without,
This is characterized in that the tape is welded on both the inner and outer sides of the tape passing portion 12.

(Operation of the Invention) By adopting the above-mentioned means, the tape welding device 40 in the bag making machine 1 according to the present invention operates as follows.

As shown in FIG. 11, the first tape welding means 20 acts to weld the synthetic resin tape material T passed through the tape passage part 12 and a part of the outside of the tape passage part 12. . In other words, the synthetic resin tape material T and a part of the tape passage part 12 (the bag body 1
The synthetic resin tape material T is fixed to the tape passage part 12 by welding the outer side of the part located at the end when it is set to 0.

As shown in FIG. 12, the second tape welding means 30 acts to weld the synthetic resin tape material T and a part of the inside of the tape passage 12. That is, the synthetic resin tape material T is welded to the inside of a part of the tape passage part 12 (the part located at the end when the bag body 10 is made, in other words, the part welded by the first tape welding means 20). , tape passage part 12
The synthetic resin tape material T is fixed to the surface.

As described above, the tape welding device 40 in the bag making machine 1 according to the present invention connects the bag body 10 and the synthetic resin tape material T that will become the handle 13 inside the tape passing section 12.
It is firmly fixed on both outer sides.

(Example) Next, the tape welding device 40 in the bag making machine 1 according to the present invention will be described in detail based on an example shown in the drawings.

The first tape welding means 20 is a part that welds the synthetic resin tape material T passed through the tape passage part 12 and a part of the outside of the tape passage part 12, as shown in FIG. That is, the synthetic resin tape material T is welded to the outside of a part of the tape threading part 12 (the part located at the end when the bag body 10 is made), and the synthetic resin tape material T is fixed to the tape threading part 12. It is. As shown in FIGS. 1 and 2, this first tape welding means 20 includes a pair of welding blades 21 with flat cutting edges that have built-in heating heaters and are movable up and down. By sandwiching both outside sides of the tape passage part 12, the synthetic resin tape material T and a part of the outside of the tape passage part 12 are welded together.

As shown in FIG. 12, the second tape welding means 30 is a part that welds the synthetic resin tape material T and a part of the inner side of the tape passage part 12. That is, the synthetic resin tape material T is welded to the inside of a part of the tape passage part 12 (the part located at the end when the bag body 10 is made, in other words, the part welded by the first tape welding means 20). , the synthetic resin tape material T is fixed to the tape passing portion 12. As shown in FIGS. 3 and 4, this second tape welding means 30 includes a welding piece 31 with a built-in heater, and a pair of pressers arranged to sandwich this welding piece 31 and movable up and down. The synthetic resin tape material T and the inner side of the tape threading part 12 are welded by pressing both inner sides of the tape threading part 12 against the welding piece 31 with the pressing pieces 32. Note that when the bag making machine 1 stops, the welded piece 31 retreats from the working position, and the stopped bag material B, which is positioned across the welded piece 31, is abnormally heated.
Bag material B is designed to prevent curling or holes.

Next, a bag making machine 1 incorporating the tape welding device 40 according to the present invention on its line will be described.

As shown in FIGS. 5 and 6, this bag making machine 1 mainly includes a folding device 50, a converting device 60, a punching device 70, a tape threading device 80, a tape welding device 4
0, a tape passage welding device 90, and a side welding/fusion cutting device 100.

As shown in FIG. 7, the folding device 50 uses a triangular plate-shaped folding section 51 to fold a synthetic resin sheet material S wound around a roll 52 into two, and folds this synthetic resin sheet material S into two. Both ends of the sheet are bent to form a tape passing portion 12, and as shown in FIG. This is the part that will be used as bag material B. Note that this bending device 50 applies the technology disclosed by the present inventor in a previous application (Japanese Patent Publication No. 13341/1983). And this bag material B
are continuously sent to the next process from this bending device 50.

The converting device 60 is a part that intermittently sends out the bag material B that is continuously sent out from the folding device 50. That is, next, the punching device 70 punches the opening 15.
, or when the tape welding device 40 welds the synthetic resin tape material T and the tape threading portion 12, the bag material B needs to be temporarily stopped. The bag material B sent out from 50 is changed from continuous running to intermittent running. Note that this conversion device 60 uses a conventionally known device.

The punching device 70 is a part that forms an opening 15 in the tape passage portion 12 of the bag material B that is intermittently sent out by the converting device 60, as shown in FIG. That is, next, the tape threading device 80 forms an entrance for passing the synthetic resin tape material T through the tape threading portion 12. Note that this opening 15 becomes a portion that exposes the handle 13 to the outside when the bag body 10 is completed.

The tape threading device 80 is a part that passes the synthetic resin tape material T through the tape threading portion 12 through the opening 15 formed by the punching device 70, as shown in FIG.

In the tape welding device 40, FIGS.
As shown in the figure, as described above, the tape threading device 8
0, the synthetic resin tape material T passed through the tape passing portion 12 and a portion of both the inner and outer sides of the tape passing portion 12 are welded.

As shown in FIG. 13, the tape threading part welding device 90 is a part that welds the end of the tape threading part 12 and the bag material B to form the tape threading part 12 into a bag shape.

As shown in FIG. 14, the side welding/fusion cutting device 100 welds bag material B into a bag shape, and
The welded portion is the part where the bag material B is fused and cut to form the bag body 10. This side welding/fusion cutting device 100
consists of a welding blade 101 with a flat edge and a built-in heater and a fusing blade 102 with a sharp edge. This is the part where bag material B is cut by melting. The welding blade 101 and the fusing blade 102 are
As shown in Fig. 6, it is in a different position before activation, but when activated, it moves left and right and descends to weld bag material B and melt and cut it on the welded part. There is. The bags 10 completed by being welded and cut by the side welding/cutting device 100 are conveyed to a stacker 120 by a conveyor 110, where an operator packs them into boxes and ships them.

As mentioned above, in this bag making machine 1, the bag body 1
0 and the synthetic resin tape material T that becomes the handle 13 are firmly attached to each other, and a high-quality bag 10 is manufactured safely and with good productivity.

Note that the present invention is not limited to the above embodiments, and for example, the first tape welding means 20 and the second tape welding means 20,
The position of the tape welding means 30 may be reversed, in short, the synthetic resin tape material T and the tape passing portion 12
Any configuration may be used as long as it is possible to weld the outer part of the synthetic resin tape material T and the inner part of the tape threading part 12. .

(Effect of the invention) As detailed above, the bag making machine according to the present invention has the following features:
"In a bag making machine that manufactures a bag body made of a synthetic resin sheet material, in which a handle made of a synthetic resin tape material for closing an opening is passed through a tape passage part formed around the opening, A tape welding device for fixing the synthetic resin tape material to a part of the tape threading part, the tape welding means welding the synthetic resin tape material and a part of the outside of the tape threading part; A tape welding device for a bag making machine characterized by comprising a second tape welding means for welding a resin tape material and a part of the inner side of the tape passage section.''

Therefore, according to the tape welding device of this bag making machine, the tape threading part and the synthetic resin tape material can be welded without increasing the welding time or increasing the welding temperature. To firmly adhere a bag body to a synthetic resin tape material serving as a handle without damaging the aesthetic appearance of the bag body due to curling or holes.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the first tape welding means of the tape welding device in the bag making machine according to the present invention, FIG. 2 is a side view of the same, and FIG. 3 is an implementation of the second tape welding means. FIG. 4 is a front view showing an example, FIG. 4 is a side view of the same, FIG. The figure is a perspective view showing a state in which a synthetic resin sheet material is folded in half using a folding device, FIG. 8 is a perspective view showing a state in which the bottom of the bag material is bent to form a gusset, and FIG. FIG. 10 is a perspective view showing a state in which an opening is formed in the tape threading section, FIG.
A perspective view showing a state in which the synthetic resin tape material and a part of the outside of the tape threading part are welded by the tape welding means, and FIG. FIG. 13 is a perspective view showing the welded state, and FIG.
Figure 4 is a perspective view showing the bag formed by the side welding and fusing device, Figure 15 is a front view showing the bag, and Figure 1 is a front view showing the bag.
Figure 6 is a front view showing the bag with the opening closed;
FIG. 17 is a partially enlarged front view showing a conventional bag. Explanation of symbols 10...Bag body, 11...Opening part, 12
...Tape threading part, 13...Handle, 20...First tape welding means, 30...Second tape welding means, 40...Tape welding device, 1...Bag making machine, S...Synthetic resin sheet material, T...Synthetic resin tape material .

Claims (1)

[Claims] 1. Manufacture a bag body made of a synthetic resin sheet material, in which a handle made of a synthetic resin sheet material for closing the opening is passed through a tape passage portion formed around the opening. A tape welding device for fixing the synthetic resin tape material to a part of the tape threading part in a bag making machine, the first tape welding the synthetic resin tape material and a part of the outside of the tape threading part. A tape welding device for a bag making machine, comprising: a welding means; and a second tape welding means for welding the synthetic resin tape material and a part of the inner side of the tape passage.