JPH0367862B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a manufacturing method capable of manufacturing a bag body having a substantially triangular shape with a sealing piece with high efficiency.

(Prior Art) Conventionally, when packaging processed cooked food 8 such as rice balls, for example, as shown in FIG. 7
There is a situation in which bags equipped with a sealing piece 21 for sealing are frequently used (for example, the bag body equipped with a sealing piece 21 for sealing
Publication No. 149359).

Therefore, in the past, the sealing piece 21 as described above was used.
As a means for mass-producing substantially triangular bags equipped with , there is a means described in Japanese Patent Application Laid-Open No. 51-96676.

That is, this conventional means, as shown in FIG.
After superposing the sub-film 2e, which has a narrower width than the main film 1e, on the upper surface side of the main film 1e, the superposed films 1e and 2e are sequentially cut into a V-shape using a fusing blade 4e formed in a V-shape in plane. This is a means of cutting in a shape of a letter.

(Problem to be Solved by the Invention) However, with the above-mentioned conventional means, two bags with sealing pieces can be manufactured at the same time by a single fusing operation, but in this type of industry, generally a very large number of bags are manufactured. The reality is that products are being ordered and received with short delivery times. Therefore, even with conventional means, the work efficiency was never satisfactory.

As a means for increasing the effectiveness of bag manufacturing, there is, for example, the means disclosed in Japanese Utility Model Application Publication No. 53-75315. However, this method is only applicable to the mass production of simple triangular bags without a sealing piece. It is extremely difficult to manufacture a bag with a sealing piece.

Conventionally, there is a method for relatively efficiently manufacturing bags without a sealing piece, but when manufacturing a bag with a sealing piece as shown in Fig. 4, there are specific problems in manufacturing efficiency. He had it.

SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to produce a substantially triangular body having a sealing piece with higher efficiency than conventional means.

(Means for Solving the Problems) The present invention uses two sub-films for one main film, instead of polymerizing one sub-film on one main film as in the past. By devising the shape of the fusing blade and the mode of polymerization of the sub-films, the shape of the fusing blade and the manner of polymerization of the sub-films are devised to eliminate the problem that it is impossible to form a sealing piece due to the polymerization of the two sub-films. This is designed to achieve the above object by increasing the number of bags that can be obtained in one melt-cutting operation to twice that of the conventional method.

That is, in the present invention, two belt-shaped sub-films 2 and 2a each having a narrower width than the main film 1 are attached to a belt-shaped main film 1 having a predetermined width at a portion 20 between them.
The secondary films 2 and 2a are polymerized in a parallel state with a gap between
A and 1b are set in a non-polymerized state, and the base A of the fusing blade 4, which is formed in a planar shape in which two approximately triangular blades sharing the base A and facing each other, is attached to two sub-films. The main film 1 located in the interspace 20 is sealed by cutting each of the films 1, 2, 2a by the fusing blade 4 at approximately the center of the interspace 20 between the main films 1, 2, and 2a. Piece 2
A pair of substantially triangular bags 6a, 6 denoted by 1 and 21
After that, the fusing blade 4 is sequentially moved relative to the longitudinal direction of the film at intervals of the width of the fusing blade 4 to cut the fusing blade 4 into pieces.
The main film 1 is placed between the bags 6a and 6b which are separated and formed by sealing pieces 21 and 2 on both side edges 1a and 1b.
This is a method for manufacturing a substantially triangular bag with a sealing piece, in which a pair of substantially triangular bags 6c and 6d, denoted by No. 1, are simultaneously formed.

(Function) According to the bag manufacturing means characterized by the above-mentioned configuration, by the fusing operation using the fusing blade 4, the main film corresponding to the intervening portion 20 where the sub-films 2 and 2a are not superposed is removed. Two substantially triangular bags 6a and 6b are manufactured in sequence, in which the main film 1 is separated at the position 1 and the sealing piece 21 is formed. In the fusing operation after moving the film, at the same time as producing new bags 6a, 6b equipped with the same sealing piece 21 as the previous one, the film is cut between the new bags 6a, 6b and the previous film fusing position. Sub film 2,
Two substantially triangular bags 6c and 6d are manufactured, in which the sealing pieces 21 and 21 are the opposite side edges 1a and 1b of the main film 1 on which 2a is not superposed. That is, in the present invention, four approximately triangular bags with sealing pieces are manufactured at the same time by a single fusing operation.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

First, as shown in FIG. 1, a main film 1 made of synthetic resin having a predetermined width is placed on the top side
Two sub-films 2, 2a having a width narrower than that of The sub-films 2 and 2a are not superimposed on the main film 1 at the position of the inter-part 20. Further, on both side edges 1a and 1b of the main film 1, positions are formed at an interval of 1/2 at which the sub-films 2 and 2a do not overlap.

Thereafter, in the above state, the polymerized films 1, 2, 2a are sequentially cut by the fusing blade 4 of the sealer 3. The fusing blade 4 of the sealer 3 is formed as shown in FIG. do. The fusing blade 4 has a pair of oblique sides B, C and oblique sides D, E that intersect with each other, sandwiching the base A, and the oblique sides B,
Both C and hypotenuses D and E are connected to the base A from the middle of their lower part via the pieces f, f and g, g, and share the base A and are symmetrical about the base A. The blade is configured to form two blades each having a substantially triangular planar shape.

Then, the fusing blade 4 having the above-mentioned configuration is faced to a sealing base 5 having a concave groove having a similar planar shape,
If the fusing operation is performed by aligning the bottom side A of the fusing blade 4 along the center of the interspace 20 between the sub-films 2 and 2a, that is, along the center line of the main film 1, the flat surface of the fusing blade 4 will first be aligned as shown in Fig. 3A. Two substantially triangular bags 6a and 6b that match the shape can be formed.

Taking one bag b as an example, the bags 6a and 6b have the films 1 and 2a welded to the oblique sides d and e, and have an opening 7 at the upper edge thereof. A sealing piece 21 is formed of the main film 1 located in the interspace 20.

On the other hand, the oblique sides j and k of the remaining polymeric films 1, 2, and 2a, which were cut by the melt cutting operation, are also in a welded state. Further, in order to continuously manufacture bags thereafter, the polymerized films 1, 2, 2a are transferred in the longitudinal direction and the fusing operation is repeated using the fusing blade 4 in the same manner as described above. As shown in FIG. 3B, the polymerized films 1, 2, 2a are intermittently transferred by a pitch L, which is the width interval of the fusing blade 4, and the fusing operation is performed each time the film is stopped.

Therefore, by this fusing operation, the two bags 6a, 6b are directly cut and separated in the same manner as described above, and at the same time, the polymeric films 1, 1, which are present on the right side of the bags 6a, 6b are The oblique sides m and n of the other side edges of 2 and 2a are also melted at the same time, resulting in two bags 6 of the same shape.
c and 6d will be manufactured at the same time. That is, in the second and subsequent fusing operations, a total of four bags can be manufactured at the same time in one fusing operation.

By the way, since the bags 6c and 6d are formed in the opposite direction from the other side bags 6a and 6b,
Both side edges 1a and 1b of the main film 1 on which the sub-films 2 and 2a are not superposed are formed as sealing pieces 21 and 21 for sealing the openings 7 and 7, respectively. Therefore, the bags 6c, 6d and the other bags 6a, 6b can be formed as suitable bags having the same shape and each having a sealing piece.For example, as shown in FIG. It can be suitably used as a bag to house the bag and seal the opening 7 with the sealing piece 21.

Thereafter, the fusing operation may be repeated while sequentially moving the fusing blade 4 relatively along the polymerized films 1, 2, 2a at intervals of the pitch L in the same manner as described above.

In the figure, numeral 11 is a leftover piece that is not used for manufacturing the bag.

Incidentally, in the present invention, the specific shape of the bag and the specific shape of the fusing blade 4 used for the fusing operation are not limited as described above. The fusing blade 4 may be such that the oblique sides B, C and D, E are in direct contact with each other, as shown in FIG. The sides h and h are designed to be orthogonal to the base A, or horizontal sides s and s are separately provided at the top of each of the hypotenuses B, C, D, and E as shown in Figure C. There is no problem in constructing the bag 6 having an opening 13 at the lower part as shown in FIG. The specific length dimensions, slope steepness, etc. of the oblique side and the base A can be freely changed within the scope of the present invention. The present invention does not care about the specific manner in which the bottom side and the oblique side of the fusing blade 4 are connected, nor does it matter whether or not the oblique sides intersect. In short, it is sufficient that the blades are formed in a planar shape in which two substantially triangular blades that share the base A are opposed to each other. Even if the planar shape of the fusing blade 4 is not strictly a true triangular shape such as a pentagon or a hexagon, it is sufficient if the general shape is a shape that approximates a triangular shape.

In addition, the present invention does not include the specific material and dimensions of the film that is the material of the bag, its polymerization method, the width dimension of the non-polymerized portions (the mutual portion 20 and both side edges 1a, 1b), etc. It is not limited as follows.
In short, the main film 1 and the two sub-films 2 and 2a, which are narrower than the main film 1, are connected to the main film 1.
What is necessary is to make them mutually polymerized so that the side edge portions 1a, 1b of the film and the mutually spaced portion 20 of the sub-films 2, 2a are in a non-polymerized state.

Incidentally, the present invention provides a bag body having perforations 12 cut in advance on either or both of the main film 1 and the sub-films 2, 2a which are overlapped as shown in FIG. It is also possible to manufacture 6. The bag obtained by this means can be suitably used as the outer bag of the bag shown in FIG. 4.

Further, in the present invention, when repeatedly performing the fusing operation, it is sufficient to move or transfer the fusing blade 4 and the polymerized film 1, 2, 2a relatively, but the pitch is determined by the fusing and cutting as in the above embodiment. It is not necessary to always match the width interval L of the approximately triangular portion of the blade 4. Second
As shown in the figure, hypotenuses B, C, D, and E are sides f, f,
If it extends beyond the contact points with g, g, for example, as shown in FIG. 7, the oblique sides B, C, D,
They may be sequentially moved using the maximum width _L1 of E as the width interval.

In addition, all the process operations of the means for manufacturing the bag according to the present invention can be changed arbitrarily within the scope of the present invention, and the manufactured bag can be used for storing cooked processed foods such as rice balls. Needless to say, the invention is not limited to the above, and the specific use thereof is not concerned at all.

(Effects of the Invention) As described above, the present invention has two sub-films superimposed on a main film such that the sub-films and both side edges of the main film are in a non-polymerized state. Then, by using a planar fusing blade having two substantially triangular shapes that share a common base and facing each other, the bottom of the fusing blade is placed approximately in the center of the area between the sub-films where the sub-films are not overlapped. In order to sequentially fuse and cut the polymeric films at the width intervals of the fusing blades, the fusing operation involves cutting two approximately triangular bags whose sealing pieces are the parts of the main film located between the sub-films. Not only can it be directly fused and formed,
In the second and subsequent fusing processes, a bag similar to the previous bag is produced, and at the same time two approximately triangular bags are made, with the sealing pieces being the side edges of the main film 1 where the sub-film is not polymerized. It became possible to properly manufacture the body.

As a result, the present invention can double the work efficiency compared to the conventional means for manufacturing bags with sealing pieces, which could only produce two bags in one process of fusing, and can quickly and in large quantities produce this type of sealing piece. A special effect has been achieved in that a substantially triangular bag can be manufactured.

[Brief explanation of drawings]

Figures 1 to 3 show this example, Figure 1 is a perspective view showing the polymerized state of the film, Figure 2 is a plan view showing an example of a fusing blade, and Figures 3A and 3B show the fusing process. A plan view shown. FIG. 4 is a perspective view showing an example of how the manufactured bag is used. FIGS. 5A, 5B, and 5C are plan views showing other embodiments of the fusing blade. FIGS. 6A and 6B are front views showing other embodiments of the manufactured bag. FIG. 7 is a plan view showing another embodiment of the fusing process. FIG. 8 is a perspective view showing a conventional example. 1... Main film, 1, 1a... Both side edges, 2, 2
a... Sub-film, 4... Fusing blade, 6a, 6b, 6
c, 6d... Bag body, 20... Mutual portion, 21... Sealing piece, A... Bottom side.

Claims (1)

[Claims] 1. On a belt-shaped main film 1 having a predetermined width, two belt-shaped sub-films 2 and 2a having a narrower width than the main film 1 are superposed in a parallel state with a space provided between them, and The sub-films 2, 2a
is set in a non-overlapping state with both side edges 1a, 1b of the main film 1, and the fusing blade 4 is formed in a planar shape in which two substantially triangular blades sharing the base A face each other. The bottom side A is two sub-films 2,
By cutting each of the films 1, 2, and 2a by the fusing blade 4 at approximately the center of the interspace 20 between the main films 1 and 2a, the main film 1 located at the interspace 20 is cut into a sealing piece 21. . Both side edges 1 of the main film 1 are placed between the bags 6a and 6b separated by the blade 4.
A method for manufacturing a substantially triangular bag with a sealing piece, characterized by simultaneously forming a pair of substantially triangular bags 6c and 6d, in which a and 1b are sealing pieces 21 and 21.