JP5443847B2 - Cylindrical package and manufacturing method thereof - Google Patents

Description

  The present invention relates to a cylindrical packaging body including a sealing portion formed by converging and welding both ends of a cylindrical body filled with contents, and an opening tape partially welded to the cylindrical body, and the same The present invention relates to a manufacturing method, for example, a technique effective when applied to food packaging such as sausage, rice cake, and cheese.

For example, as a means for packaging foods such as sausages, rice cakes, and cheeses so that they can be stored for a long period of time, a cylindrical package made of a thermoplastic resin film is frequently used.
This tubular package is formed by continuously forming both ends of a belt-shaped film original fabric made of a thermoplastic resin, and filling the contents into the continuously formed tubular body. A flat part in which the contents in the cylindrical body are partially excluded is formed for each predetermined length, and the flat part is converged to form a sealing part that encloses the contents, and downstream of the flat part. It is manufactured by separating the side cylindrical body portion from the upstream cylindrical body portion.

  As a means for forming the sealing portion, there is known a method in which the ends of the converged cylindrical body are connected by a metal wire clip (Patent Document 1: Japanese Utility Model Laid-Open No. 62-95566). Issue gazette). However, the use of this metal wire clip is accompanied by a problem of hindering metal detection for detecting the mixing of metal foreign matter into the contents during product inspection. In addition, it is difficult to completely close the gap between the converging portions when the wire clip is tied, and there is a problem in maintaining confidentiality.

  As a means for forming a sealing portion that does not use a metal wire clip, there is known a method of ultrasonically welding the ends of a focused cylindrical body (Patent Document 2: Japanese Patent Laid-Open No. 59-26424). ). This method is relatively simple, but the pressure resistance strength of the welded part is low, and it is effective for packaging products that only need to be packaged, but for products that require a heating process such as retort or boil after packaging. There was a problem that it was not suitable.

  Therefore, in order to increase the pressure resistance of the welded portion, a reinforcing film (or reinforcing tape) is attached to the end of the converged cylindrical body, and the converging end of the cylindrical body is welded and sealed together with the reinforcing film. A method for forming a portion has been proposed (Patent Documents 3 and 4: Patents 2516888 and JP-A 2006-69648). According to this method, the pressure-resistant strength of the sealing portion can be reduced without using a wire clip due to the reinforcing effect by surrounding the focused end of the cylindrical body with the reinforcing film (or reinforcing tape). Can be increased.

  On the other hand, an opening tape (cut tape) is attached to this type of tubular package so that the contents can be taken out without using scissors or a knife (Patent Document 5: Japanese Patent Application Laid-Open No. Hei 5 (1994)). No. 5-246458). The opening tape is partially welded to the surface of the packaging body film, and the packaging body film portion of the welding portion can be torn and opened by picking and pulling the non-welding portion.

Japanese Utility Model Publication No. 62-95566 JP 59-26424 A Japanese Patent No. 2516885 JP 2006-69648 A JP-A-5-246458

  In the cylindrical packaging body described in Patent Documents 3 and 4, the pressure resistance strength of the sealing portion can be increased only by welding without using a metal wire clip. It is necessary to attach a reinforcing film to the formed end portion, or to surround the converging end portion with a reinforcing tape. These steps add to the complexity and cost of the apparatus, In order to smoothly perform a series of continuous processes of continuously filling and sealing a cylindrical body continuously formed from a film original, it tends to be a bottleneck trouble.

On the other hand, as shown in, for example, Patent Documents 1 and 5, this type of tubular package has an opening tape (cut) that allows the contents to be taken out without using scissors or a knife. Tape) is attached. The opening tape is partially welded to the surface of the packaging body film, and the packaging body film portion of the welding portion can be torn and opened by picking and pulling the non-welding portion. However, the unwelded part of the opening tape is in close contact with the package film surface, and there is a frequent inconvenience that a clue (finger) for picking the opening tape cannot be obtained. Alternatively, the non-adhesive portion of the opening tape is difficult to pick and cannot be pulled well.

  The present invention has been made in view of the problems as described above, and the object thereof is to use a metal wire clip and rely on a reinforcing film and a reinforcing tape only for reinforcing the sealing portion. In addition, it is possible to form a sealing portion that can obtain a necessary sealing strength by welding the converging end portion, and to open the contents for taking out the contents easily and reliably, and a cylindrical packaging body that can be used It is to provide a manufacturing method.

  In order to solve the above problems, the present invention provides the following means.

(1) The contents are filled into a cylindrical body formed by welding both end portions of a belt-shaped film raw material made of thermoplastic resin, and both ends of the cylindrical body are converged and welded. A cylindrical packaging body in which a sealing portion for enclosing an object is formed, and an opening tape is partially welded to a film surface of the cylindrical body,
The opening tape is folded in a wave shape in a direction perpendicular to the longitudinal direction of the cylindrical body in a state where one end side thereof is positioned at the converging end of the cylindrical body and overlaps with the end of the cylindrical body. A cylindrical package characterized by forming a sealed portion that is converged and welded together to form an integrated sealing portion.

  (2) In the above means (1), the opening tape has a sealing portion integrated at one end side thereof at the converging end portion of the cylindrical body and being converged and welded together with the end portion of the cylindrical body. And the other end side is welded to the body of the cylindrical package, and the intermediate part of the tape covers the shoulder between the body and the end of the cylindrical package in a non-welded state. Characteristic cylindrical package.

  (3) In the above means (1) or (2), the film forming the opening tape and the cylindrical package is a vinylidene chloride resin film, and the film thickness of the opening tape is that of the package. A cylindrical package characterized by being large.

  (4) The cylindrical packaging body according to any one of the above means (1) to (3), wherein the opening tape is disposed at both axial ends of the cylindrical packaging body.

  (5) In the above means (4), the lengths of the opening tape disposed at one shaft end of the cylindrical package and the opening tape disposed at the other shaft end are different from each other. A tubular package.

  (6) In any one of the above means (1) to (5), the two opening tapes are arranged side by side on at least one shaft end of the cylindrical package, and the two opening tapes are The cylindrical package is provided at a symmetrical position with respect to the central axis of the cylindrical package.

  (7) In the above means (6), the two opening tapes are different from each other in length from the converging end portion of the cylindrical packaging body.

(8) A cylindrical body is continuously formed by welding both side ends of a belt-shaped film original fabric made of a thermoplastic resin, and the contents are filled into the continuously formed cylindrical body for each predetermined length. Forming a flat portion from which the contents in the cylindrical body are eliminated, converging and welding the flat portions to form a sealing portion for enclosing the contents, and a downstream cylindrical body portion of the flat portion Is a method of manufacturing a cylindrical package body that is separated from the upstream cylindrical body portion,
For each position where the flat portion of the belt-shaped film original is formed, an opening tape that straddles the formation position of the flat portion in the flow direction is attached in advance before forming the cylindrical body, and upstream of the opening tape. A step of welding the end and the downstream end to the film original fabric,
The step of forming the flat part of the cylindrical body into a wave shape in a direction perpendicular to the flow direction in a state of being overlapped with the opening tape ,
A step of forming the sealing portion by folding and converging and welding the wavy shaped portion ;
A method for producing a cylindrical package characterized by the above.

  (9) A method for producing a cylindrical package, characterized in that, in the means (8), the opening tape is folded together with the flat portion of the cylindrical body to be focused and welded.

  Without using a metal wire clip, and without relying on a reinforcing film or tape only for reinforcing the sealing portion, a sealing portion capable of obtaining the required sealing strength by welding the converging end is provided. In addition to being able to be formed, it is possible to obtain a cylindrical package that can be easily and reliably opened when the contents are opened.

It is a front view which shows 1st Embodiment of the cylindrical package body which concerns on this invention. It is a front view which shows schematic structure of the vertical continuous filling packaging apparatus used for manufacture of the cylindrical package body of this invention. It is a top view which shows a part of film original fabric pre-processed in order to comprise the cylindrical package body which concerns on this invention. It is sectional drawing which shows the upper side figure of the forming apparatus which converges the flat part of a cylindrical package, and the middle state in which the flat part is converged. It is a top view which shows 2nd Embodiment of the film raw fabric pre-processed in order to comprise the cylindrical package body which concerns on this invention. It is a top view which shows 3rd Embodiment of the film raw fabric pre-processed in order to comprise the cylindrical package body which concerns on this invention. It is a front view which shows the cylindrical package manufactured using the film original fabric of FIG. It is a top view which shows 4th Embodiment of the film original fabric pre-processed in order to comprise the cylindrical package body which concerns on this invention.

=== Embodiment of cylindrical package ===
FIG. 1 shows a first embodiment of a cylindrical package according to the present invention.
The cylindrical package 30 shown in the figure is filled with the contents 17 in a cylindrical body 31 formed by welding both end portions of a strip-shaped film original fabric 10 made of a thermoplastic resin. Both end portions of 31 are converged and welded to form a sealing portion 33 that encloses the content 17, and an opening tape (cut tape) 40 is partially welded to the film surface of the cylindrical body 31. . Reference numeral 41 denotes the welded portion.

  Further, the opening tape 40 has one end located at the converging end of the cylindrical body 31 and is folded together with the end of the cylindrical body to be converged and welded to form an integrated sealing portion 33. ing. The other end of the opening tape 40 is welded (41) to the body of the cylindrical package 30. Furthermore, the intermediate part 40c of the opening tape 40 covers the shoulder part between the body part and the end part of the cylindrical package 30 in a non-welded state.

  The film forming the opening tape 40 and the tubular package 30 is preferably a vinylidene chloride resin film, and it is particularly desirable that the film thickness of the opening tape 40 is larger than that of the package 30.

  As will be described later, the opening tape 40 also serves to reinforce the sealing portion 33 in addition to the opening function, and increasing the film thickness of the opening tape 40 has the effect of ensuring the opening. In addition, the effect of increasing the reinforcing effect of the sealing portion 33 is also obtained.

=== Example of Manufacturing Method ===
FIG. 2 shows a schematic configuration of a vertical continuous filling and packaging apparatus that can be used for manufacturing the cylindrical package of the present invention.
In the apparatus shown in the figure, a strip-shaped film original fabric 10 drawn out from a roll is guided by guide rolls 11a and 11b and guided to a metallic cylindrical forming member 12 called a forming plate. In this molding member 12, both end portions of the original film 10 are overlapped with each other.

  Under the forming member 12, high frequency electrodes 13a and 13b are provided to face each other, and the substantially central portion of the overlapping margin of both side edges of the film original fabric 10 is welded while being sandwiched between the high frequency electrodes 13a and 13b. Thus, the cylindrical body 31 is continuously formed. Downstream (downward position) of the high-frequency electrodes 13a and 13b are arranged feed rollers 14a and 14b that rotate continuously, and feeds the continuously formed cylindrical body 31 downstream (downward).

  A filling nozzle 15 is inserted into the hollow portion of the cylindrical molded member 12 from above. A filling pump 16 is provided above the filling nozzle 15, and continuously fills the cylindrical body 31 with contents 17 such as processed food through the filling nozzle 15.

  A pair of ironing rollers 18a and 18b constituting ironing means are disposed downstream (downward position) of the feed rollers 14a and 14b. The squeezing rollers 18a and 18b are driven so as to repeat the press contact and separation intermittently. By these squeezing rollers 18a and 18b, the cylindrical body 31 filled with the contents is clamped at regular intervals. As a result, the contents 17 of the cylindrical body 31 are partially excluded at predetermined intervals, and a flat portion 31a is formed in the excluded cylindrical body portion.

  A focusing / sealing mechanism 20 is provided downstream (downward position) of the squeezing rollers 18a and 18b. The basic configuration of the focusing / sealing mechanism 20 is described in, for example, Japanese Patent Application Laid-Open No. 11-165713, and is not described in detail, but is driven in synchronization with the descending speed of the cylindrical body. During the driving, the flat portion 31a serving as the shaft end portion of the cylindrical package 30 is pinched and focused, and the focused end portion is welded using ultrasonic waves, and then the focused end portion is It is configured to cut. Thereby, the cylindrical package 30 which has the welding sealing part 33 at both ends is manufactured continuously.

=== Preliminary processing of original film ===
In order to produce the said cylindrical package 30 using the apparatus mentioned above, as shown in FIG. 3, for every position (31a) in which the said flat part 31a of the strip | belt-shaped film original fabric 10 is formed, the flatness An opening tape 40 straddling the region where the portion 31a is to be formed in the flow direction is attached in advance before the cylindrical body 31 is formed, and the upstream end and the downstream end of the opening tape 40 are respectively attached to the original film. The process of welding to is performed.

  The flat portion 31a is formed with a predetermined width w for each predetermined length L of the original film 10 after the cylindrical body is formed and filled with the contents, but the opening tape 40 has a flat portion. It is partially welded and attached in advance to a position straddling the region 31a to be formed (portion indicated by hatching). Reference numeral 41 denotes the welded portion.

  The welding process between the film 10 and the tape 40 can be performed using a known apparatus described in, for example, Japanese Patent Laid-Open No. 6-171624.

  The cylindrical packaging body 30 of the present invention shown in FIG. 1 is produced by performing the step of forming the sealing portion 33 by converging and welding the flat portion 31a of the cylindrical body 31 together with the opening tape 40. be able to.

=== Details of Sealing Portion ===
FIG. 4 shows a folding forming apparatus 21 that forms part of the converging / sealing mechanism 20 for converging and welding the flat part 31 a together with the opening tape 40. As shown in FIG. 5A, the forming device 21 has a pair of forming rollers 21a and 21b, and the flat portion 31a and the opening tape 40 are overlapped with each other between the rollers 21a and 21b. By passing it through, as shown in FIG. 5B, it is possible to perform a preliminary molding for folding and converging the flat portion 31a and the opening tape 40 together.

=== Action / Effect ===
As described above, the flat portion 31a and the opening tape 40 are converged and welded together, whereby the opening tape 40 reinforces the welding portion and can form a strong welding sealing portion 33. In this case, the reinforcement is not performed separately using a film or tape for reinforcement, but by the opening tape 40 that should be originally provided in the cylindrical package. That is, the opening tape 40 can also serve as a reinforcement of the welding sealing portion 33. Furthermore, since the opening tape 40 is converged and welded together with the flat portion 31a, it is possible to obtain a higher reinforcing effect than the reinforcement that attaches the reinforcing film or the reinforcing tape to the converging portion or the reinforcement that surrounds from the outside. it can.

  On the other hand, as shown in FIG. 1, the opening of the packaging body 30 with the opening tape 40 is such that the intermediate portion 40c of the tape covers the shoulder portion between the body portion and the end portion of the cylindrical packaging body 30 in a non-welded state. As a result, a gap that becomes a cue (finger cue) can be easily formed on the edge of the tape portion covering the shoulder portion, and thereby the opening operation can be performed easily and smoothly.

  Thus, in the cylindrical package according to the present invention, without using a metal wire clip, and without relying on a reinforcing film or a reinforcing tape only for reinforcing the sealing portion, A sealing part capable of obtaining a necessary sealing strength by welding can be formed, and when opening for taking out the contents, it is possible to obtain a cylindrical package that can be easily and reliably performed.

=== Other Embodiments of the Invention ===
As shown in FIG. 5, the tubular package according to the present invention has one axial end portion of the tubular package 30 by shifting the position of the opening tape 40 attached to the original film 10 to one side in the longitudinal direction. The length of the opening tape 40 disposed on the other end and the opening tape 40 disposed on the other shaft end may be different from each other.

  Further, as shown in FIG. 6, the opening tape 40 is attached to the original film 10 in two rows at a predetermined interval in the width direction, thereby attaching the shaft of the cylindrical package 30 as shown in FIG. Two opening tapes 40 may be arranged side by side at the end, and the two opening tapes 40 may be arranged at symmetrical positions with respect to the central axis of the cylindrical package 30.

In this embodiment, the amount of the opening tape 40 used is increased, but the reinforcing effect of the welded sealing portion 33 can be increased accordingly.
In this case, although not shown, the two opening tapes 40 may be arranged such that the lengths from the converging end of the cylindrical package 30 are different from each other.

Further, as shown in FIG. 8, by overlapping one end of the opening tape 40 attached to the original film 10 on the flat portion formation planned area (31 a), only on one axial end of the cylindrical package 30. An opening tape 40 can be attached.
In this case, at the other shaft end, one end of the opening tape 40 located there reinforces the welded seal. Thereby, the reinforcement effect of the sealing part 33 is securable with the usage-amount of the small opening tape 40. FIG.

  In addition to the above, the present invention can have various embodiments. For example, the welding portion 41 between the opening tape 40 and the film surface of the cylindrical package 30 can be more reliably opened by making the welding pattern U-shaped or V-shaped.

DESCRIPTION OF SYMBOLS 10 Strip film original fabric 11a, 11b Guide roll 12 Metal cylindrical molding member 13a, 13b High frequency electrode 14a, 14b Feed roller 15 Filling nozzle 16 Filling pump 17 Contents such as processed food 20 Converging / sealing mechanism 21 Folding forming Apparatus 21a, 21b Forming roller 30 Cylindrical packaging body 31 Cylindrical body 31a Flat part 33 Sealing part 40 Opening tape (cut tape)
41 welding part 40c middle part

Claims (9)

The cylindrical body formed by welding both ends of the belt-shaped film raw material made of thermoplastic resin is filled with the contents, and both ends of the cylindrical body are converged and welded to enclose the contents. A cylindrical packaging body in which a sealing portion is formed, and an opening tape is partially welded to the film surface of the cylindrical body,
The opening tape is folded in a wave shape in a direction perpendicular to the longitudinal direction of the cylindrical body in a state where one end side thereof is positioned at the converging end of the cylindrical body and overlaps with the end of the cylindrical body. A cylindrical package characterized by forming a sealed portion that is converged and welded together to form an integrated sealing portion.   2. The opening tape according to claim 1, wherein one end side of the opening tape is located at a converging end of the cylindrical body, and is converged and welded together with the end of the cylindrical body to form an integrated sealing portion, and the other end. A cylindrical shape characterized in that the side is welded to the barrel portion of the cylindrical packaging body, and an intermediate portion of the tape covers the shoulder portion between the barrel portion and the end portion of the cylindrical packaging body in a non-welded state. Packaging body.   3. The film according to claim 1 or 2, wherein the film forming the opening tape and the cylindrical package is a vinylidene chloride resin film, and the film thickness of the opening tape is larger than that of the package. Tubular package.   The cylindrical packaging body according to any one of claims 1 to 3, wherein the opening tape is disposed at both axial ends of the cylindrical packaging body.   5. The cylindrical packaging according to claim 4, wherein the length of the opening tape disposed at one shaft end of the tubular packaging body and the length of the opening tape disposed at the other shaft end are different from each other. body.   In any one of Claims 1-5, while the two said opening tapes are arrange | positioned along with at least one axial end part of the said cylindrical package body, the two opening tapes are the said cylindrical package bodies. A cylindrical package characterized in that it is arranged in a symmetrical position with respect to the central axis.   7. The cylindrical package according to claim 6, wherein the two opening tapes have different lengths from the converging end of the cylindrical package. A cylindrical body is continuously formed by welding both side ends of a strip-shaped film raw material made of thermoplastic resin, and the cylindrical body is filled into the continuously formed cylindrical body at predetermined lengths while filling the contents. A flat part from which the contents in the body are excluded is formed, and the flat part is converged and welded to form a sealing part that encloses the contents, and the downstream cylindrical body part of the flat part is located upstream. A method for manufacturing a cylindrical package body that is separated from a cylindrical body part,
For each position where the flat portion of the belt-shaped film original is formed, an opening tape that straddles the formation position of the flat portion in the flow direction is attached in advance before forming the cylindrical body, and upstream of the opening tape. A step of welding the end and the downstream end to the film original fabric,
The step of forming the flat part of the cylindrical body into a wave shape in a direction perpendicular to the flow direction in a state of being overlapped with the opening tape ,
A step of forming the sealing portion by folding and converging and welding the wavy shaped portion ;
A method for producing a cylindrical package characterized by the above.   9. The method of manufacturing a cylindrical package according to claim 8, wherein the opening tape is folded together with the flat portion of the cylindrical body, and is converged and welded.

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