JPS6116967Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a paper container sealing device that joins and seals the opening of a paper container filled with a liquid beverage, etc., by folding the facing surfaces on both sides of the opening of the paper container inward and placing it in the joining preparation position. The present invention relates to a device for folding an opening for support.

FIG. 1 is a diagram showing a process commonly used in the past, from filling a paper container 1 with milk, youth, sake, etc. to sealing the opening of the paper container 1. In the state shown in FIG. 1a, the paper container 1 is already filled with the filling liquid, and the thermoplastic resin coating applied to the inner surface of the opening is heated so that the coating can be used as an adhesive. Furthermore, the opposing surfaces 1a of the openings located at the front and rear of the paper container 1 in the transport direction are folded inward by triangular folding members (not shown), and the other opposing surface 1b It is also slightly folded inwards.

The paper container 1 is moved from the position shown in Fig. 1a to the position shown in Fig. 1b.
The pair of clamping members 2A,
The upper end of the facing surface 1b is clamped and bonded by the clamping members 2B and sealed.
2B, it is necessary to fold both opposing surfaces 1b inward until the upper ends of the opposing surfaces 1b are almost in contact with each other, as shown in FIG. 1b.

For this reason, conventionally, a pair of fixed folding guides 3 are provided between the position a in FIG. He was making an insert into the company. However, when such means are used, there is a risk that the opposing surface will be damaged due to friction between the fixed guide 3 and the opposing surface 1b, and the paper container may fall over due to the friction, or the paper container may fall to the position shown in FIG. 1b. When the paper container is stopped, the paper container is tilted, and there is a risk that the subsequent clamping by the clamping members 2A and 2B may be incomplete, or that an inappropriate portion may be clamped, resulting in damage to the paper container.

The present invention has been developed in view of the above-mentioned drawbacks, and instead of the conventional fixed guide, it is possible to achieve accurate clamping and sealing with a clamping member without damaging the opposing surface of the opening of a paper container. The purpose of this device is to provide an opening folding device, which is characterized by folding the opposing surfaces on both sides of the opening of the paper container inward and clamping and joining the upper edges of the opposing surfaces. In the sealing device, a pair of folding members press-support the paper container from both sides and fold the folding members into a joining preparation position in which upper edges of opposing surfaces are brought close to each other; The folding member includes a first support surface that contacts and supports the upper end of the side surface of the paper container, and a first support surface that contacts and supports the upper end of the side surface of the paper container. This means that a second support surface is formed which extends from the second support surface and press-supports the outer side of each opposing surface at the bonding preparation position.

According to this configuration, the side surface of the paper container and the surface facing the opening are simultaneously clamped and supported by each support surface of the folding member, and the upper edges of these facing surfaces are joined by the clamping member in close proximity to each other. It can be folded and held accurately in the ready position.

The present invention will be explained below with reference to the illustrated embodiments.
In FIG. 2, 1 is a paper container, 2A and 2B are clamping members, and 3A and 3B are folding members provided in place of the conventional folding fixed guide 3. As shown in FIGS. 2 and 3, the clamping member 2A is
It includes a clamping part 4 that presses the opposing surface 1b of the paper container 1, and two parallel L-shaped arms 5 integrated with the clamping part 4,
The end of each arm 5 is pivotally supported by a pin 6 to a support bracket 8 integral with the machine frame 7. The other clamping member 2B includes a clamping part 9 that faces the clamping part 4 and an L-shaped arm 10 integrated therewith. It is pivoted to a support bracket 8. Links 12 and 13 are connected to intermediate bent portions of the arms 5 and 10 via pins 14 and 15, respectively, and each link 12 and 13 is connected to a rod 16 of an air cylinder (not shown) fixed to the machine frame 7. They are interlocked via pin 17.

Therefore, by operating the air cylinder to raise and lower the rod 16, each clamping member 2A,
2B is opened and closed via links 12 and 13. In this embodiment, each clamping member 2
The movement locus P of A and 2B is set to substantially match the movement locus Q drawn by the lower end 1c of the bonded portion on the upper part of the opposing surface 1b (see FIGS. 1b and 1c).

Furthermore, the folding members 3A and 3B are shown in FIG.
As shown in FIG. 4, there is a support surface 18 that supports the side surface of the paper container 1, and an opposing surface 1b formed at a predetermined angle with respect to the support surface 18.
are held at an angle (see FIGS. 1b and 2) such that the upper ends of each facing surface 1b can face each other with a slight gap when they are about to be clamped by the clamping members 2A and 2B. A surface 19 is provided. Each folding member 3A, 3B further has both supporting surfaces 1
8 and 19, and the distance between the pair of support surfaces 20 is equal to the distance between the support surfaces 1 and 19.
The supporting surfaces 18, 19 correspond to the width of the paper container 1 in the direction perpendicular to the plane of the paper at the positions in contact with the supporting surfaces 18, 19.
The interval is set so that the distance increases as the distance increases.

As shown in FIG. 2, each folding member 3A, 3B
is provided with arms 21 on its back surface, and the intermediate portions of each arm 21 are pivotally supported on the machine frame 7 by pins 22, respectively. The end of each arm 21 is linked to an actuation rod 23 provided on the machine frame 7 so that it can be raised and lowered, and the upper end of each actuation rod 23 is linked to a rod 25 of the second air cylinder via a link mechanism 24. When 25 is moved up and down, the link mechanism 2
4. Each folding member 3A, 3B can be opened and closed via the operating rod 23 and arm 21.

In the above-mentioned configuration, the paper container 1 is intermittently conveyed from a direction perpendicular to the paper surface of FIG. 2 to a position directly below the pair of clamping members 2A and 2B.
In the previous process, the upper opening has already been heated and is in a state where it can be bonded, and the paper container 1
The opposing surfaces 1a located at the front and rear of the sheet 1 in the conveying direction are also already folded inward.

When the paper container 1 is supplied to a position directly below the pair of clamping members 2A, 2B, the rod 25 of the second air cylinder is first lowered to operate each of the folding members 3A, 3B, and the paper container 1 is folded by its support surfaces 18, 19.
The paper container 1 is held in the vicinity of the shoulder portion 1b of the paper container 1 (FIG. 5). At this time, the paper container 1 is accurately positioned by the tapered support surfaces 20 located at the front and rear of the paper container 1 in the conveying direction, even if there is some positional deviation in that direction, and the pair of opposing surfaces 1b are folded inward by the support surfaces 19 by a predetermined amount, and are held with a small gap at their upper ends. Moreover, since both sides of each opposing surface 1b are guided and held in a predetermined direction by the support surfaces 20, the upper ends of the pair of opposing surfaces 1b accurately face each other, and there is no risk of positional deviation in the conveying direction between them.

When this state is reached, the rod 16 is then lowered to close the gap between the pair of clamping members 2A and 2B.
The upper adhesive portion of the opposing surface 1b is held between both members 2A and 2B. At this time, since the movement trajectory P of each clamping member 2A, 2B is made to substantially match the movement trajectory Q drawn by the lower end 1c of the adhesive part, the clamping members 2A, 2B
To reduce the amount of relative deviation between the bonding part and the facing surface 1b, thereby ensuring smooth adhesion of the bonding part, and minimizing the possibility of liquid leakage from the bonding part. Can be done.

Furthermore, after this, the rods 16 and 25 are raised to open the pair of clamping members 2A, 2B and the folding members 3A, 3B, respectively, and the sealed container 1 is carried out, and a new container is carried in. come.

In addition, in the above embodiment, the pair of clamping members 2A, 2
Although an air cylinder was used as the operating mechanism for the folding members 3A and 3B, it is of course possible to employ other means such as a solenoid or a cam.

As described above, according to the present invention, a paper container can be smoothly folded inward without damaging the opposing surfaces on both sides of the opening, and the opposing surfaces can be folded inwards without causing the paper container to fall over. An excellent effect can be obtained in that it can be folded into a predetermined position with high precision.

[Brief explanation of the drawing]

Figures 1a, b, and c are explanatory diagrams for explaining the structure and operation of a conventional device, respectively; Figure 2 is a partially sectional front view showing an embodiment of the present invention; and Figure 3 is a diagram shown in Figure 2. A perspective view showing the clamping members 2A and 2B,
FIG. 4 is a side view of the folding members 3A and 3B shown in FIG. 2, and FIG. 5 is a partially sectional front view showing a state different from FIG. 2. 1... Paper container, 1a, 1b... Opposing surface, 2A,
2B... Clamping member, 3A, 3B... Folding member,
25... Air cylinder rod, 18, 19, 2
0...Supporting surface.

Claims (1)

[Scope of utility model registration request] In a paper container sealing device that folds opposing surfaces on both sides of the opening of the paper container inward and clamps and joins the upper edges of the opposing surfaces, the paper container is supported under pressure from both sides and the upper edges of the opposing surfaces are brought close to each other. a pair of folding members that are folded into the bonding preparation position, and an operating mechanism that reciprocates the folding members between a press-contact position to the paper container and an open position separated from the press-contact position; a first support surface that contacts and supports the upper end of the side surface of the paper container;
A folding device for an opening in a paper container sealing device, characterized in that a second support surface extends from the support surface and press-supports the outside of each opposing surface at the bonding preparation position.