JPS61236500A - Method of forming cut-open guide section of tube body for packaging - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a flexible material suitable for storing a plurality of unit contents such as pocket tissues and sanitary napkins (napkins). The present invention relates to a method of forming an incision guide portion for a certain packaging tube body.

[Conventional technology]

BACKGROUND OF THE INVENTION It is common practice to form incision guides such as perforations in advance in packaging made of resin film material or the like for the purpose of facilitating the removal of the contents.

Conventionally, the method for forming such an incision guide is to cut a flexible tube into a continuous body in advance so that it can be cut to the required length and used for packaging, and then gusseted on one or both sides of the flexible tube. Fold it into a flat tube shape, keep this in a tensioned state with multiple pairs of clamping rollers that also serve as feed rollers, apply saw teeth to the inner end of the gusset from the outside, and run the tube body to rotate the saw teeth. A method of forming perforations by resting on the inner end of the gusset, or a method of applying a stand to the flat tube from one side and a cutting blade from the other side to form perforations. It has been known.

[Problems to be addressed by the invention] However, in the former method, the sawtooth is simply applied from the outside to the inner end of the gusset of the flat tube body in a tensioned state. However, on the other hand, there were the following problems. In other words, in this method, it is necessary to apply stable and sufficient tension to the flat tube body as it travels, but if the tube body itself is made of a thin resin material that has a relatively large elongation and is easily plastically deformed, Another problem was that if sufficient tension was applied, elongation and plastic deformation occurred, resulting in a large change in the tension state, making it difficult to form perforations with the sawtooth at the correct position. . Also,
This method naturally has the disadvantage that perforations can only be formed in the longitudinal direction of the tube body, and therefore, when this method is used as a package, the contents tend to scatter.

On the other hand, in the latter method, the perforations are made on the flat tube body on a stand, so the above-mentioned problems arise. However, due to the processing method, it is inevitably formed in a form that penetrates the front and back (both sides) of the flat tube body, resulting in the problem that it is impossible to form perforations only on one side.

Therefore, the present invention provides a method that can accurately form an incision guide such as a perforation in any position and direction on one side of a thin tube body that is relatively prone to elongation and plastic deformation. Okay, I'll give it a 5.

[Means for solving problems]

In the present invention, there is provided a method in which a flat tube body made by folding and flattening a flexible tube body is run, and an incision guide portion is formed on one side of the flat tube body using an actuated sewing machine blade. , a core is positioned within the flat tube body and held in place by support means that indirectly supports the core from outside the flat tube body;
The sewing machine is characterized in that the core is used as an internal support on one side of the flat tube body as a stand when the sewing machine blade is operated.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view showing an example of a case where the irration core and its support means are realized as a horizontal type when carrying out the method of the present invention, and in the same figure, the perforation is indicated by reference numeral 1. This is a flat tube body that is the object on which an incision guide section such as the following is to be formed. 2 is a core, and rollers 3, 4, and 5 are support means for the core 2, and 6 is a support means for the core 2.
is a sewing machine blade.

The core 2 has a shape located within a horizontally running flat tube body, and in the illustrated example, it is formed into an irregular plate shape that is thick at the center and gradually becomes thinner toward both ends. There is. The core 2 is indirectly held at both ends by a pair of support rollers 3 and 4 from the outside of the tube body 1, thereby restricting its movement in the vertical direction. The core 2 is provided with concave surfaces 7°7 on the top and bottom surfaces closer to the tip side (support rollers 3, 3 side) than the center thereof, and internal rollers are configured to sink into both of these concave portions, respectively. 8, 8 are rotatably fixed at that position via bearings 8m, 8a fixed to the core 2. This internal p-roller 8.8 is arranged so that its axis of rotation is parallel to the axis of rotation of the support roller, that is, in the width direction of the core 20. In addition, this internal roller 8
, 80 width is set to be approximately equal to or smaller than the width of the core 2 since the rollers 8, 8 are also located within the flat tube body 1 together with the core.

Core fixing rollers 5.5 are disposed at outer positions corresponding to the inner rollers 8, 8, and are in indirect contact with the inner rollers 8.8 through the flat tube body 1, respectively.

These core fixing rows 25, 5 are arranged at positions slightly offset toward the center of the core 2, thereby restricting the movement of the core 2 toward its rear end (towards the support roller 4). has been done.

A recess 9 extending in the width direction of the core 20 is provided on the upper surface of the central portion of the core 2 . At an upper position corresponding to the recess 9, a sawtooth-shaped perforation blade 6 for forming an incision guide such as a perforation extending in the width direction of one side of the flat tube body 10 is movable up and down. will be placed in 1st
In the figure, -GO indicates a support member.

Next, a method for forming an incision guide portion according to the present invention will be described in detail.

First, regarding the flat tube body l, a flexible resin tube is directly manufactured by a known appropriate method, for example, by an inflation method, and a pattern 11 such as a picture or a letter is formed on the surface of the tube as shown in FIG. After printing or printing the pattern 11 on a film-like material, a tube body is created by a fusing sealing method. Then, if this tube body is flattened by making creases in the box core in the gusset folding process, the second
A flat tube body 1 as shown in the figure is obtained.

The flat tube body 1 thus obtained is wound up in advance around a feeding drum 12, for example, as shown in FIG. Then, this flat tube body 1 is placed on the winding drum 13 on the other side.
The core 2, the roller group 3.
4. 5, a support means for the core 2, a sewing machine blade 6, etc. are provided. Furthermore, if necessary, guide rollers 14 are installed near the feeding drum 12 and the winding drum 13, respectively.
and 15, and an intermittent rotating roller 16 for intermittently running the flat tube body 1 at a position behind the support roller 4. A position detection element 17 and the like for controlling the rotation of the intermittent rotation roller 16 are provided.

As can be understood from the above explanation, the flat tube body 1 that is fed out from the feeding drum 12 is first fed by the guide roller 1.
4.14, and then between the support rollers 3 and 3, the core 2 is inserted, and the core 2 causes both sides 1a,
lb is pushed out from the inside, and then in this state passes between the core fixing rollers 5, 5, and then passes through the support roller 4.
, 4, it returns to its original flat state, passes through the intermittent rotating rollers 16, 16 rollers, and the guide roller 15, and is wound onto the winding drum 13.

At this time, by the intermittent rotation of the intermittent rotation roller 16.16 controlled based on the detection signal of the position detection element 17, the flat tube body 1 repeats the operation of traveling a certain length and then stopping. When the flat tube body 1 is stopped, if the perforation blade 6 is moved downward to pierce one side of the tube body 1, the incision guide section CC, such as perforations corresponding to the rectangular shape of the perforation blade 6, can be formed. ) is formed only on one side of the flat tube body l in its width direction.

At this time, the core 2 is attached to the flat tube body 1 as shown in FIG.
Since the so-called internal support that supports one side 1a of the flat tube body 1 from the inside functions as a stand, it is not necessary to apply a large tension force to the flat tube body 1, and it is sufficient to simply prevent the flat tube body 1 from being bent. Even if the body 1 is made of a thin material that is relatively prone to elongation or plastic deformation, this will not occur, and therefore the incision guide portion C can be formed accurately at the desired position.

Here, in addition to changing the stopping position of the flat tube body 1, the position where the incision guide portion C is formed can be arbitrarily changed. For example, as shown in FIG. When forming the seal part I on the individual package 1' in
It is also easily possible to extend it near C. In addition, a recess 9 provided in the core 2 to eliminate interference with the sewing machine blade 6 when the sewing machine blade 6 is lowered is made to extend in the longitudinal direction of the core 2 and to correspond to the recess 9. By arranging the sewing machine blade 6 in this manner, an incision guide portion extending in the longitudinal direction of the tube body 1 can be formed on one side 1a of the tube body 1.

FIG. 6 shows an embodiment in which the core, its supporting means, etc. used in carrying out the method of the present invention are realized as vertical types. In addition, in this figure, the same reference numerals are given to the constituent elements having essentially the same functions as the constituent elements shown in FIG. 1.

In this embodiment, internal rollers 8, 8 are arranged on a pair of core fixing rollers 5, 5 arranged horizontally, so as to be in indirect contact with each other via the flat tube body 1, In addition, the internal roller 48 is a holding member B that also serves as a bearing.
b, Bb are held parallel to each other without touching each other (independently rotatable).Furthermore, the holding member 8b.

8b is provided with a pair of hanging members 8o, 8a which extend downwardly from the center of the rollers 8b through between the core fixing rollers 5, 5, respectively. The leading end is fixed, so that the core 2 is suspended vertically as shown in the figure.The core fixing rollers 5, 5 are provided with the suspension member 8c.

8c, and the hanging member 8c.

Guide grooves 5a, 5a are provided to restrict movement of the core fixing roller 8c in the axial direction of the core fixing roller 5.

In this way, when the core and its support means are configured in a vertical manner, the weight of the core 2 can be effectively used, so it is possible to simplify the structure by eliminating support rollers, etc. that support both ends of the core 20. I can do it. Of course, even in this example,
Almost the same effects as those described in the previous embodiment can be obtained.

In each of the above embodiments, the sewing machine blade 6 has a straight tooth shape, but this shape can be arbitrary, and it can also be shaped like a circular saw tooth if necessary in the direction of the incision guide section to be formed. The shape of the core 2 is not limited to the shape of the embodiment, and may be modified as necessary.

7 to 9 show another embodiment of the present invention, in which the working sewing machine blade 6 in the form of a flat tooth as illustrated in FIG. 1 is replaced with a roll. A so-called rotary sewing machine blade 20 having saw teeth 20b extending in the axial direction is provided on the outer periphery of the main body 20a.
It has a structure in which a supporting roll 21 is provided, which has bristles 21& in a dense state and is disposed at 5 so that the tips of the bristles 211L can support one side 1a of the tube body 10 from the inside.

In this embodiment, when the rotary sewing machine blade 20 is rotated as the tube body 1 travels, the cutting edge of the sawteeth 20b will move to one side of the tube body 10 as shown in FIG. L can be penetrated and inserted between the bristles 21&, and at this time, the bristles of the group of bristles 211L support one side 1a from the inside and exert an action to help ensure that the cutting edge cuff can penetrate that one side 1a.

Therefore, when using such a method, the roll body 2
The outer circumference length of 0a is the target pitch (incision guide part C to be formed)
By aligning the IC (distance between ICs) and continuously running the tube body 1, it is possible to continuously form the incision guide portion C extending in the width direction of the single-sided IIL as described above. Here, the pattern 11 etc. of the tube body 1 is detected using the position detection element 17 etc. shown in FIG. An incision guide portion may also be formed.

In this embodiment, even if the support roll 21 is, for example, a relatively stiff sponge roll, the same effects as described above can be achieved.

In each of the above-mentioned embodiments, a method is used in which a sewing machine blade is pierced toward a core placed inside a tube body that runs intermittently or continuously, and the tube body is folded at two places on each side of the tube body. Since a gusseted bag type bag with eyes is used, even if the core is relatively thick, an incision guide part can be formed on the container that spans almost the entire length in the width direction of one side of the tube body. This is extremely convenient.

However, according to the present invention, by changing the cross-sectional shape of the core, even for a tube body in the shape of a simple pouch, the thickness at both ends in the width direction of the core can be made sufficiently thin, and the sewing machine blade If it has a correspondingly curved shape, it is possible to form an incision guide portion extending almost the entire length on one side of the child pouch-like tube body in the width direction.

〔Effect of the invention〕

As described in detail above, in the method for forming the incision guide part of a packaging tube body according to the present invention, a core is positioned inside the flat tube body which is made flat with folds, and the core is placed inside the flat tube body. The inner bone on one side of the flat tube body is used as a platform when the core is held in place by a supporting means that indirectly supports the flat tube body from the outside and an incision guide portion is formed on the flat tube body using a sewing machine blade. As a result, not only tubes with normal tensile strength for packaging, but also thin-walled tubes that are relatively prone to elongation and star-shaped irregularities can be easily removed. This provides an excellent effect that is unprecedented in that an incision guide portion such as a perforation can be formed accurately in the position and direction.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the main part showing an embodiment of the present invention, Fig. 2 is a perspective view of a flat tube body, Fig. 3 is a schematic process diagram of the whole, and Fig. 4 shows how the incision guide part is formed. FIG. 5 is a perspective view of an individual packaged product, FIG. 6 is a perspective view of main parts showing another embodiment of the present invention, and FIGS. 7, 8, and 9 are FIG. 7 is a side sectional view, a perspective view, and an enlarged side view showing still another embodiment of the present invention. 1...Flat tube body, 1a/old...single side, 2
... Core, 3 ... Support roller, 4 ...
... Support roller, 5 ... Core fixing roller,
6... Sewing machine blade, 8... Internal roller,
8b...Holding member, 8c...Hanging member, 9...Recess, 16...Intermittently rotating roller, 17-Old position detection element , C... Incision guide section, 2o... Rotary sewing machine blade, 21...
...Support roll.

Claims (1)

[Claims] A method of running a flat tube body made by folding and flattening a flexible tube body, and applying an incision guide part on one side of the flat tube body with an actuated sewing machine blade,
A core is positioned within the flat tube body and is held in place by support means that indirectly supports the core from the outside of the flat tube body, and when the sewing machine blade is operated, the core is flattened. A method for forming an incision guide portion of a packaging tube body, the method comprising using one side of the tube body as an internal holder.