JPH0699525A - Bag and method and apparatus for manufacturing the bag - Google Patents

Abstract

PURPOSE:To eliminate releasing of a bag by a hand operation after molding by continuously connecting a zipper member to a dressing material and molding the member in a state disconnected from its engagement. CONSTITUTION:A dressing material 2 is fed in a superposed state, supplied in a direction of an arrow A by rotating feed rollers 3, and molded to a bag. Here, it is inserted to a part of the material corresponding to a port of the bag in a state that a male piece 1b is engaged with a female piece 1a. A connecting block 4 made of a heater is pressed from above and below to a port pat of the material 2 inserted with a zipper member 1. Thus, the member 1 is connected to an inner surface of the material 2. A separating lip 5 separates the member 1 of an engaged state thereby to continuously release the port of the material 2. Then, a horn 6 of an ultrasonic fastening unit at a downstream side of the lip 5 is vertically moved to operate an ultrasonic vibration at the member 1 at each predetermined interval, thereby fusion-bonding to seal the member 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag body provided with a chuck member for opening and closing a bag mouth, a method for manufacturing the bag body and an apparatus therefor.

[0002]

2. Description of the Related Art A certain amount of green tea, black tea, tea leaves such as oolong tea, coffee powder, or dashi powder is filled in an airtight bag, and a required amount is taken out from the bag at the time of use. The quality of food products consumed in small quantities from the bag in this way deteriorates due to moisture absorption and oxidation over time.Therefore, the bag can be sealed freely, opened only when it is used, and otherwise sealed to the outside air. It is necessary to cut off contact with the contents. For this reason, bag bodies in which chuck members that can be fitted to each other are attached to the bag mouths have been used in recent years.

FIG. 4 shows an example of such a chuck member 1, which comprises a female chuck 1a having a concave portion in the longitudinal direction and a male chuck 1b which is fitted into and separated from the female chuck 1a. 1b is integrally formed with mounting pieces 1c and 1d for mounting the packaging material. The chuck member 1 is made of a flexible material such as plastic so that it can be repeatedly used. The chuck member is attached to the bag mouth of the bag body, and the male chuck 1b is fitted to the female chuck 1a to close the bag mouth of the bag body, while the male chuck 1b is closed.
The bag mouth is opened by disconnecting from the female chuck 1a.

A bag body having such a chuck member 1 is formed by inserting a long strip-shaped packaging material into a bag mouth portion of the packaging material and joining them by welding or the like, after which the individual bag bodies are joined. It is manufactured by cutting into.
Therefore, the zipper member is fitted to the bag body 20 immediately after manufacturing, and the bag mouth is closed.

[0005]

As described above, in the conventional bag body, since the bag mouth is closed by the fitting of the chuck member, in the step of filling the contents after molding the bag body,
It is necessary to open the bag mouth of the bag. Such opening of the bag mouth has been performed manually by an operator on each molded bag body. However, in order to separate the chuck member in the fitted state,
A large amount of force is required, and performing this work for each bag requires a great deal of labor, and not only the workability is poor, but also many defective products due to separation occur.

The present invention has been made in consideration of the above circumstances, and provides a bag body which is molded so that the bag mouth is in an open state, so that the bag body can be manually opened after molding. It is intended to be unnecessary. Another object of the present invention is to provide a method and an apparatus which can favorably manufacture this bag.

[0007]

The bag body of the present invention for achieving the above object is a bag body in which chuck members to be mutually fitted are joined to a packaging material at a bag mouth portion, wherein the chuck member is a packaging material. After being continuously joined to, the chuck member is formed into a bag shape in a state of being separated from the fitting. The method of the present invention for producing this bag body is a method for producing a bag body in which a mutually fitting chuck member is joined to a bag mouth, and a peripheral portion excluding the bag mouth is sealed. A feature is that after the chuck member in the fitted state is inserted into the portion corresponding to the bag mouth while being inserted along the longitudinal direction of the packaging material, the fitting of the chuck member is forcibly separated, and the sealing is performed in this separated state. And
Further, the manufacturing apparatus of the present invention fits the joining means for joining the chuck member joined to the packaging material with the joining means for inserting the continuous chuck member in the fitted state along the longitudinal direction of the strip-shaped packaging material. It is characterized in that it is provided with a separating means for separating from the state and a sealing means arranged in the supply path for supplying the packaging material to seal the peripheral portion of the bag body excluding the bag mouth.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows an apparatus for producing a bag according to the present invention. In FIG. 1, 2 is a long strip-shaped packaging material, which is an aluminum sheet having a gas barrier property, a light shielding property, etc. and a plastic. A laminated film, a laminated gas barrier plastic sheet, or any other known material may be used. This packaging material 2 is supplied in the direction of arrow A by the rotation of the plurality of feed rollers 3 in the folded and folded state, and is formed into individual bags by this supply. Reference numeral 1 denotes a chuck member having the same structure as that shown in FIG. 4, which is inserted into a portion of the packaging material corresponding to the bag mouth in a state where the male chuck 1b and the female chuck 1a are fitted to each other.

In this way, the joining block 4 consisting of a heat heater presses the bag mouth portion of the packaging material 2 into which the chuck member 1 is inserted from above and below, whereby the chuck member 1 is brought into contact with the inner surface of the packaging material 2. To be joined. At the time of this joining, the chuck members 1 are in a state of being fitted to each other. Reference numeral 5 denotes a separating lip inserted into the packaging material 1 after the chuck member 1 is joined.

FIG. 2 shows details of the separation lip 5 on the downstream side in the supply direction of the packaging material 2. The constituent members thereof will be described below with reference to FIG. The separating lip 5 is, as shown in FIG.
It is inserted in the packaging material 2 so as to reach from the open end of the packaging material 2 to the inner side of the bag mouth portion. The separating lip 5 is for forcibly separating the chuck member 1 in the fitted state to continuously open the bag mouth portion of the packaging material 2. Therefore, after passing through the separating lip 5, the chuck member 1 of the packaging material 2 maintains the separated state.

An ultrasonic bonding device is arranged downstream of the separating lip 5. Reference numeral 6 is a horn of this ultrasonic bonding apparatus, and 7 is a pedestal provided at a position facing the horn.
The horn 6 and the pedestal 7 are provided corresponding to the joint portion of the chuck member 1, and intermittently move up and down to apply ultrasonic vibration to the chuck member 1 at regular intervals. Due to this ultrasonic vibration, the chuck members 1 are welded to each other at regular intervals. A chain line portion 8 in FIG. 2 shows this welded portion, and the same portion 8 corresponds to a vertical seal line 9 of the bag body described later. As a result, the zipper member 1 is firmly fixed at both ends together with the vertical seal line 9 for each bag body, so that it is possible to repeat fitting and disconnecting without causing positional displacement.

Reference numeral 10 is a seal block composed of a heat heater for forming the vertical seal line 9, and the packing material 2 polymerized by sandwiching the packing material 2 from above and below is heat-welded. As a result, the bags 20 are sequentially molded, and the cutter 11 cuts the vertical seal line 9 to separate the bags 20 into individual bags 20.
In such manufacturing, the individual bag bodies 20 are molded with the chuck member 1 separated.

FIG. 3 shows a bag body 2 molded as described above.
Indicates 0. The chuck member 1 at the bag mouth portion is a female chuck 1a.
And the male chuck 1b, but both ends are firmly fixed by the ultrasonic welding portion 8 of the vertical seal line 9. When the bag mouth is opened in this manner, the process of filling the contents can be started as it is. For this reason, it is not necessary to manually open the bag mouth, and the contents can be filled quickly and efficiently. Moreover, since excessive force does not act when the chuck member is separated, the chuck member is not damaged and the bag body is not broken, and defective products are not generated.

[0014]

As described above, according to the present invention, since the bag body is formed so that the chuck member is in the separated state, the manual separation is not required, and the manufacturing can be performed quickly and without generation of defective products.

[Brief description of drawings]

FIG. 1 is a side view of a manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the manufacturing apparatus.

FIG. 3 is a partially cutaway perspective view of a bag body.

FIG. 4 is a perspective view of a chuck member.

[Explanation of symbols]

 1 Chuck member 2 Packaging material 5 Separation lip 9 Vertical seal line 10 Seal block 20 Bag body

Claims (3)

[Claims] 1. A bag body in which mutually interlocking chuck members are joined to a packaging material of a bag mouth portion, and after the chuck members are continuously joined to the packaging material, the chuck members are separated from the fitting. A bag body, which is formed into a bag shape in a state. 2. A method of manufacturing a bag body, wherein a mutually engaging chuck member is joined to a bag mouth, and a peripheral portion excluding the bag mouth is sealed, in a portion corresponding to the bag mouth in a band-shaped packaging material. A method for manufacturing a bag body, characterized in that after the chuck members in the fitted state are inserted and joined along the longitudinal direction of the packaging material, the chuck members are forcibly separated from each other and the sealing is performed in this separated state. . 3. A joining means for joining a continuous chuck member in a fitted state to a packaging material while inserting the chuck member in a longitudinal direction of a strip-shaped packaging material, and a cutting device for separating the chuck member joined to the packaging material from the fitted state. An apparatus for manufacturing a bag body, comprising: a separating means and a sealing means which is disposed in a supply path for supplying a packaging material and seals a peripheral portion of the bag body excluding the bag mouth.