JP3065911B2 - How to store the string chuck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic chuck in which male and female hooks of a chuck are welded to a narrow strip-shaped plastic film (in the present invention, this is referred to as a "string chuck"). The present invention relates to an efficient storage method of a string-shaped chuck which is easy to store, does not cause partial elongation due to tension during storage and storage, and does not cause twisting or entanglement during supply in the production of packaging bags. . The cord-like chuck is used for manufacturing a packaging bag with a chuck which can be freely opened and resealed.

[0002]

2. Description of the Related Art In recent years, in order to satisfy consumer needs and maintain product quality, packaging having high moisture resistance, high oxygen barrier properties, light shielding properties, magnetic opacity, and the like has been required. The market for packaging films comprising a base material and a laminated film having various functions on the base material or a multilayer film as a base material is rapidly expanding. The demand for packaging bags with zippers having openings that can be opened and resealed in bag products using such composite films and multilayer films is increasing. In such a packaging bag using a composite film or a multilayer film as a base material, it cannot be manufactured by a method of integrally molding a film and a chuck made of a general single material, and a composite film or a multilayer film and a string-like chuck are used. In many cases, a method of manufacturing each of them separately and supplying them to a bag making machine and performing heat sealing and manufacturing them has been adopted in many cases. As another method, an existing film such as a composite film, a multilayer film, or a single film is used as a raw material, and the raw material is preheated to attach only the string-shaped chuck. ing.

[0003] In the case of film, the whole is flat, so that it can be easily stored simply by winding it on a bobbin (cylindrical), and it can be supplied simply by rewinding it. Since the chuck has an uneven shape as shown in FIG. 3, there are several storage methods, each having advantages and disadvantages. A typical example is a method in which a string-shaped chuck is wound around a paper tube of a square corrugated cardboard case in which a paper tube is set at the center of the bottom surface, and is wound and stacked in a ring shape (FIGS. 5 and 6). A method of winding on a bobbin using a winding machine (FIG. 7). There is. When the string-shaped chuck is housed in a square corrugated cardboard case, the string-shaped chuck fed from the manufacturing apparatus of the string-shaped chuck by a driving device is fixed around a paper tube at the center of the case as shown in FIG. If it turns around in the direction of rotation, it will be wound up and overlap while drawing a circular locus. Generally, the chuck maker and the bag making maker are often different, and the string-like chucks housed in the cardboard case are usually transported to the bag making maker by a truck and used. The cord-like chuck usually accommodates a length of about 2000 meters, but is made of plastic having a low specific gravity and is gently stored in a cardboard case. But transportation, loading,
The stacking of the string-like chucks in the case is disturbed by vibrations of loading and unloading, and the string chucks become tangled when supplied to the bag making machine. Even if such troubles are avoided, one end of this case is taken out of the case and supplied to the bag making machine in the production of the packaging bag. As described above, a twisted cord-shaped chuck enters at the entrance of the bag making machine, and the production work cannot be continued. This interruption is accompanied not only by loss of time but also by breakage of the string chuck due to torsion. In a bobbin winding method using a winder, when a string-shaped chuck is wound on a bobbin, the bobbin 17 is shifted from side to side at an equal pitch P every time the bobbin 17 makes one rotation as shown in FIG. It is necessary. Then, after the string-shaped chuck has moved to the end face of the width of the bobbin, it is necessary to turn it in the opposite direction and wind it up.

In this manner, the string-shaped chuck is gradually wound up on the bobbin, and as the winding-up is performed, consideration is given to reducing the tension of the string-shaped chuck. The obtained string-shaped chuck is subjected to a contraction stress in stock, and is set in a state of being wound around a bobbin in a partially extended state. The bobbin-wound string-shaped chuck is rewound and supplied to the bag making machine. The string-shaped chuck set as described above has not only a partial elongation but also a linear shape even when unwound. It may be twisted and meandering, which may cause trouble during the bag making process. In addition, few of the current bag making machines are equipped with a rewinding machine for bobbin winding of a long string-shaped chuck, and the installation cost is expensive. It is a problem. Therefore, it has been desired to develop a method for efficiently storing a string-shaped chuck that can easily store a long string-shaped chuck and that does not have a problem such as twisting in a conventional bag making machine.

SUMMARY OF THE INVENTION The present invention provides a chuck which can easily store a string-shaped chuck in a storage case, and which can be freely opened and resealed from a plastic film such as a composite film or a multilayer film and a string-shaped chuck. It is convenient to manufacture attached packaging bags with a bag making machine, and can be supplied to the bag making machine without being entangled by vibrations such as transportation after loading and unloading. An object of the present invention is to develop a storage method capable of obtaining a linear cord-shaped chuck without partial elongation and without a problem of meandering when unwound.

[0005]

According to the present invention, there is provided: [1] a long cord-like chuck in a space between an upright pipe provided at the center of a storage case and an inner wall of the case, and not exceeding the upright pipe. And stacking them while drawing a continuous U-turn shape, a continuous figure eight shape, or a trajectory of any combination thereof. [2] When storing the string-shaped chuck in the storage case, an additional tube is added to the upright tube to make the height higher than the case surface, and after the storage of the string-shaped chuck is completed, the additional tube is removed. The method for storing a string-shaped chuck according to [1]. And [3] the above-mentioned [1] or [2], wherein, when storing the string-shaped chuck in the storage case, the partitioning film is inserted every time a certain length is stored with respect to the entire length of the stored string-shaped chuck. 4. The method for storing a cord-shaped chuck according to item 1. The above objectives have been achieved by developing.

In the present invention, the storage case for the string-shaped chuck is not particularly limited as long as the string-shaped chuck for the purpose of the present invention can be inserted therein, but it is usually used as a carrying case for the string-shaped chuck. Is made of a cardboard or the like in which a pipe having almost the same height as the top of the case (in the present invention, the pipe means both a hollow pipe and a solid rod) is vertically set at the center of the bottom of the case. A rectangular or square case may be used. A paper tube is usually used as the tube. A general plastic chuck used for plastic film bags as a cord-like chuck,
For example, as shown in FIG. 3, male and female nails 3 and 4 of the chuck are attached to narrow strip-shaped films 1 and 2 made of a synthetic resin such as a thermoplastic resin such as polyethylene, polypropylene, delrin, or polyester resin. This is a plastic chuck provided with hook-shaped ridges.
The thickness of the film and the size of the claw of this cord-shaped chuck vary depending on the size of the packaging bag, the material and thickness of the base film of the packaging bag, and the purpose of use. Usually, the thickness of the film is increased.

[0007] The film used as the base material of the packaging bag,
Although it can be used even with a single layer film, the properties of the contents, moisture resistance, oxygen barrier properties, light shielding properties, magnetic opacity, etc.
A composite film, a multilayer film, or the like containing as a constituent material a film blended with an oxygen barrier resin, a magnetic powder, or the like can also be used. In order to improve the adhesion of these films to the film of the string-shaped chuck, it is also effective to pre-treat the surface to be bonded to the string-shaped chuck with a silent discharge treatment, silane coupling agent, etc. It is. The bag making in the bag making machine is performed automatically by the heat sealing method mainly for bonding the string-like chuck together with the film making. Alternatively, dry lamination using an adhesive may be used.

The string-shaped chuck is manufactured by a method of directly manufacturing the string-shaped chuck from an extruder through a die, or a method of extruding and welding only the hook portions of the chuck to a narrow band-shaped film, and a driving device. Is fed into a storage case with a paper tube upright in the center of the bottom. In this case, a tube extending to the upper part of the paper tube (for example, a paper tube may be connected, or a metal or plastic pipe may be inserted so that the string-shaped chuck does not turn in a certain direction beyond the upper part of the paper tube. ) Is preferred.
When storage is completed, remove this and close the lid to pack. By providing this paper tube, in the space between the paper tube and the inner wall of the storage case, as shown in FIG. The tip is rotated and returned, and then the oscillation is supplied again, so that the string-shaped chuck has a continuous U-turn, a continuous 8-shaped, or both. Will be stored while drawing the trajectory of any combination of. Note that the paper tube in this case may be fixed to the bottom surface, or may be in a suspended state, as long as the cord-shaped chuck needs to be prevented from rotating in a certain direction beyond the upper portion thereof. After the storage operation is completed, it is necessary to remove the extension pipe without fail, but a paper pipe may be removed.

As described above, the string-shaped chuck has a U-turn shape,
Although it is stored in the shape of a figure eight or a locus of any combination thereof, depending on the processing conditions of the string-shaped chuck in the previous process, the next turn continuous with the previous turn (the figure of eight in the U-turn). The string-like chuck may be twisted in the vicinity of a branch point connected to the turn (which may be a turn), but care must be taken so that the twisting direction is not continuously twisted in the same direction. This is the case where the string-like chuck is once stored in the storage case, and then after some processing for the purpose of annealing, etc., and then stored in the case again, or the string-like chuck is once wound on a bobbin. It often happens that twisting occurs continuously in the same direction when being stored in the storage case while rewinding. Therefore, in such a case, it is necessary to carefully prevent the twist of the string chuck. When the string-shaped chuck is stored with continuous twisting in the same direction, when it is used in a bag making machine, when the string-shaped A circle is formed and causes trouble.

[0010] Even if it can be stored properly, the string-shaped chucks stored in the case are disturbed due to vibration during transportation, loading, unloading, etc. The chuck may become tangled. In order to prevent the occurrence of such entanglement, it is sufficient to prevent the upper and lower layers of the string chuck from being mixed together when the string-shaped chuck is stored in the case to some extent. Any partitioning material can be used as long as it can prevent the overlapping, and in the present invention, it is preferable to place the partitioning so that the occurrence of the disorder of the overlap can be largely prevented. The film as a partitioning material, when the string-shaped chuck is supplied from the case to the bag making machine, the string-shaped chuck in the case gradually decreases in bulk, and even if this film comes out on the surface, Use something that does not give any resistance to removal. If you use heavy or hard dividers,
This is because resistance is added to the removal of the string-shaped chuck, which may also cause trouble.

[0011]

The method of storing a string-shaped chuck according to the present invention requires only that the string-shaped chuck be stored in the case while drawing a continuous U-turn shape, a continuous figure-eight shape, or an arbitrary combination of these orbits. No special device or machine is required for the storage method except that an upright tube is provided at the center of the bottom of the case, and the cord-like chuck turns between the inside wall of the case without passing through this tube. Although it is such a simple storage method, the string chuck can freely shrink, it does not receive special shrinkage stress like bobbin winding, and there is no set for partial elongation or tightening of winding The string-shaped chuck does not cause twisting, meandering, and other problems during removal. Furthermore, even if the turn is performed freely at the time of storage, the string chuck sent from the driving device from the string chuck manufacturing device does not twist in a certain direction, and twisting occurs, but if it is seen in a certain section, it always becomes the original. This is a storage method in which the return direction is compensated and the twist does not increase.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A polypropylene cord-like chuck 13 (w = 13 mm, h = 1.75 mm,
t = 180 μm) and a 75 mmφ paper tube 12
The paper tube further comprises a tube 650 mm × 65 having a paper tube 15 added only during the storing operation as shown in FIG.
A string-shaped chuck having a length of 2000 m was stored in a cardboard storage case 11 having a size of 0 mm and a height of 500 mm using the method shown in FIG. In the storing operation, the string-like chuck 13 is moved to the storage case 1 by the rollers 16 of the driving device in the manufacturing process.
It is sent to 1 and stored.

In this case, since the paper tube 15 stands upright in the vertical direction, the cord-like chuck 13 attempts to wrap around the paper tube 12, but no further penetration is possible when the tube is turned to some extent. Then, make a U-turn or figure-eight turn in the opposite direction and start returning. When this reverse return has also been made to some extent, further intrusion becomes impossible and U
A turn or a figure-eight turn will be repeated. The string-like chucks 13 overlap while repeating such a process, and the orbit drawn by the string-like chucks is a U-turn shape, a figure-eight shape, or a combination thereof as apparent from FIG. Chuck 13
Looking through several sections, it can be seen that the torsion is compensated for each other and the torsion is eliminated. 1000m more
At the time of storage, thin paper was spread as a partition material on the top of the stack of string-shaped chucks, and the remaining string-shaped chucks were further stored thereon. The stored case was loaded on a truck, run for one day, stored in a warehouse for another week, and then set on a bag making machine. For the bag making, a composite film composed of a biaxially stretched polypropylene film and a non-stretched polypropylene film was used, and the width was 150 mm and the length (under the chuck) was 200.
A string-shaped chuck was heat-sealed at the opening of the bag having a length of 2 mm. The bag making operation is going smoothly,
0m was used all the time, but also on the way to the end of work
As shown in (1), no bag was formed and no entanglement occurred, and bag making was performed smoothly.

[Comparative Example] The same string-shaped chuck as that used in the embodiment was used except that the storage method shown in FIGS. 5 and 6 was used, and the cardboard case to be stored was the same size. did. Drive roller 16 as in the embodiment
The string-like chuck 13 is fed in by the above, but as shown in FIG. 5 and FIG. After the storage operation was completed and the stock was stored for one week, a packaging bag of the same size in which a string-shaped chuck was heat-sealed at the opening using the same composite film as in the example was manufactured. Immediately after the start of the bag making operation, the string-shaped chuck increases the number of rings when the cord-shaped chuck is turned around. 32 could be counted at a distance of about 5 m. At this point, the string chuck could enter the bag making machine while being twisted, so the operation was stopped and the string chuck had to be cut off.

[0015]

According to the present invention, the string-shaped chuck can be easily stored in the storage case without requiring any special device or means, and the stored string-shaped chuck can be freely opened and resealed. This is a method for accommodating a string-shaped chuck, in which no twisting occurs and there is no partial elongation due to shrinkage or meandering due to setting during stocking. As a result, there is no occurrence of entanglement even during transportation, and it is possible to prevent a decrease in chuck performance due to twisting or partial elongation of the string chuck,
It is also an excellent storage method, such as improving the productivity (operating rate) of the bag making machine.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a perspective view of a cord-shaped chuck.

FIG. 4 shows a supply state of a string chuck in a conventional method.

FIG. 5 is a plan view of a comparative example.

FIG. 6 is a sectional view of FIG. 5;

FIG. 7 shows a state in which a string-shaped chuck using a winding machine in a conventional method is wound into a bobbin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Narrow band film 2 Narrow band film 3 Male claw 4 Female claw 11 Storage case 12 Paper tube 13 String-shaped chuck 14 Ring-shaped twist 15 Additional paper tube 16 Drive roller 17 Bobbin P pitch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-20630 (JP, A) JP 3-38214 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65B 25/00 B65B 5/00-5/12 B65D 85/00 B65D 85/04 B65H 75/36

Claims (3)

(57) [Claims] 1. A long string-like chuck is provided in a space between an upright pipe provided at the center of a storage case and an inner wall of the case, and a continuous U-turn or a continuous figure 8 without exceeding the upright pipe. A string-like chuck storing method characterized by stacking while drawing a trajectory of a shape or any combination thereof. 2. When storing a string-shaped chuck in a storage case, an additional pipe is added to an upright pipe so as to be higher than the case surface, and after the storage of the string-shaped chuck is completed, the additional pipe is removed. The method for storing a string-shaped chuck according to claim 1. 3. The storage device according to claim 1, wherein, when the string chuck is stored in the storage case, the partition film is inserted every time a predetermined length is stored with respect to the entire length of the stored string chuck. How to store the string-shaped chuck.