JPS60204436A - Treater for rectangular parallelepiped vessel end section - 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 The present invention relates to a rectangular parallelepiped container end processing device for forming a bag-like article, which is supplied in a folded state with one end sealed, into a rectangular parallelepiped.

Conventionally, to manufacture a rectangular parallelepiped container such as the one seen in the Milk Container Container 2007TLil, a sheet of paper coated with a heat-sealing material such as polyethylene is continuously folded in half along the longitudinal direction to form a cylinder. Heat-seal perpendicularly to the longitudinal direction to obtain a bag-like object of an appropriate size, then cut along the heat-sealed line to form a bag-like container with one end closed, and then,
After applying a suction cutlet to both sides of this container and opening the inside of the bag-like container while absorbing water, it is expanded into the correct shape using a forming plate attached to a mandrel, and then press-molded to form a rectangular parallelepiped container with one end open. Fill with liquid contents,
Finally, the packaging is sealed and folded using an automatic packaging system.

However, in this automatic packaging system, various problems arise when opening both sides of the folded bag-like container as described above with a vacuum, and inserting a pair of molding plates into the opening to form the ends into a rectangular shape. For example, there have been problems such as poor molding, contact between the opening of the container and the molding plate, and slippage between the container and the suction cup, which causes wear of the suction cup.

For example, in the method disclosed in Utility Model Application Publication No. 58-88305, both molded plates are rotated by the same amount to close and open. This is convenient for inserting into the opening, but when the molding plate is expanded, the container is pushed outward, which tends to cause misalignment between the molding plate and the ruled lines that form the shoulder of the container, resulting in poor molding. It causes

Furthermore, in the device disclosed in JP-A No. 55-143221, one of the pair of molded plates at the front in the rotational direction is fixed, and only the other is movable, so that the molded plates can be expanded. However, the design is complicated and difficult to prevent the container opening and the molding plate from touching each other when the container opening is introduced into the molding plate.

This invention has been made in view of the above circumstances, and allows the molding plates to be inserted into the opening of the container without coming into contact with each other, and also allows the container to protrude outward when the molding plates are expanded. An object of the present invention is to provide a rectangular parallelepiped container edge processing device that does not cause molding defects.

That is, the present invention includes a plurality of pairs of molding plates extending in the radial direction and protruding from the outer periphery of a rotating body, and introducing the pairs of molding plates through the open end of a bag-like container to perform the molding. In a rectangular parallelepiped container end processing device that shapes the ends of a rectangular parallelepiped container by expanding the plates, one of the molding plates is moved in the closing direction in relation to the other molding plate when the bag-shaped container is inserted. The other molding plate is provided to be slightly rotatable, and when inserted into the bag-like container, the other molding plate rotates in the direction of complete closing in relation to the one molding plate, and further when the container is removed after molding. The object of the present invention is to provide a device characterized in that the device is provided so as to be able to rotate at least slightly in the closing direction.

The present invention will be described below with reference to illustrated embodiments.

The drawing shows the main part of the rectangular parallelepiped container edge processing device according to the present invention, in which a large number of pairs of forming plates are protruded and retracted radially between a pair of rotating bodies 1. To explain this in more detail, each pair of molding plates is a first molding plate 3 rotatably provided around an axis 2, and a second molding plate 3 rotatably provided around an axis 4. It consists of plate 5. 'A bottle 6 is provided protruding near the base end of the first molded plate 3, and is fitted into an annular groove 7 provided eccentrically to prevent the first molded plate 3 from rotating when the rotating body 1 is rotated. The slope can be changed as appropriate. A pin 9 is also provided near the base end of the second molded plate 5 and protrudes in the same direction as the pin 6, and is fitted into an annular groove 8 provided eccentrically so that it can Second molded plate 5
The slope can be changed as appropriate.

That is, the pair of molded plates 3 and 5 are connected to the suction cup 1.
When the first molding plate 3 is in the position (A in the figure) inserted into the bag-like container 11 opened by 0, the first molding plate 3 faces the second molding plate 5 at an angle α (for example, the second molding plate 5 % of the rotation angle), and the second molding plate 5 closes the space between the molding plates and inserts the annular grooves 7 and 8 so that its tip is in close contact with the first molding plate 3 side. are provided for each. When the pair of forming plates 3, 5 are in the rectangular parallelepiped forming position (at B in the figure and thereafter until the formed container is discharged), the first and second forming plates 3, 5 are connected to the pin 6. It is maintained in an expanded state by the action of 9. In addition, in this case, the first
As mentioned above, the molding plate 3 rotates in the closing direction very little compared to the second molding plate 5, so it returns to its original state more quickly than the first and second molding plates 5 before reaching the first position B. returned to the expanded state. Therefore, this pair of molded plates 3,
There is no risk of the bag-like container being pushed back when it is expanded.

When the pair of forming plates 3 and 5 are in the position (C in the figure) for discharging the formed rectangular parallelepiped container, the second forming plate 5 rotates at least slightly toward the first forming plate 3, and the rectangular parallelepiped container 1 It is designed so that it can be easily lowered. The pair of molded plates 3.5 from which the container 11 has been discharged are returned to the person's position, and the same operation is repeated.

According to this device, the molding plate on the rotation direction side (first molding plate)
The ideal value of the insertion angle of the container opening into the forming plate (% of both swing angles)
) can be brought very close to the horizontal position, which makes the insertion operation easier and avoids contact between the container and the molding plate.Furthermore, the position of the suction cup (top surface) can be brought to the center. Slippage on the bag-making line is eliminated, and the problem of wear can also be improved.

Furthermore, as described above, the problem of poor molding caused by the container popping out when the molding plate is expanded can be solved.

Note that the means for adjusting the inclinations of the first molded plate and the second molded plate is not limited to the above-mentioned combination of pins and eccentric grooves, and other known means may be employed as appropriate.

[Brief explanation of drawings]

The drawing is a side view showing the main parts of the rectangular parallelepiped container edge processing device according to the present invention. In the figure 1... Rotating body, 2... Shaft, 3... First molded plate, 4... Shaft, 5... Second molded plate, 6... Pin, 7.8 ... annular groove, 9 ... pin, 10 ... suction cup, 1 ... bag-shaped container. Applicant's representative Patent attorney Takehiko Suzue Director of the Patent Office Kazuo Wakasugi 1. Indication of the case Patent application No. 59-62538 @ 2. Name of the invention Rectangular parallelepiped object end processing device 3. Person making the amendment Relationship to the case Patent applicant 4, agent 5, voluntary amendment

Claims (2)

[Claims] (1) A rotating body is provided with a plurality of pairs of molded plates extending in the radial direction and protruding from the outer periphery of the rotating body, and the pairs of molded plates are introduced through the open end of a bag-like container, and the molded plates are In a rectangular parallelepiped container end processing device that forms a rectangular parallelepiped container by an expanding operation, one of the molding plates is capable of slight rotation in the closing direction in relation to the other molding plate when a bag-like container is inserted. and the other of the molding plates rotates in the completely closing direction in relation to the one molding plate when inserted into the bag-like container, and further rotates at least in the closing direction when the container is removed after molding. A device characterized by being provided so as to be slightly rotatable. (2) A large number of the above pair of molded plates are arranged radially at regular intervals on the circumferential surface of the rotary cylinder, and one of the above molded plates is provided on the rotation direction side of each pair of molded plates. A device according to claim 1, characterized in that: