JPS59142907A - Device for sealing cover for vessel - 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 (A) Field of Industrial Application The present invention relates to a sealing device for a container lid, and more specifically,
A sealing device that presses and seals a lid placed over the open end of a container such as a cup-shaped container to the open end of the container.

I'll wait a while.

(B) Prior Art Conventional sealing devices for placing a lid on a cup-shaped container and sealing the lid and the open end of the container include those shown in FIGS. 1 and 2, for example.

This sealing device is placed over the open end of container d -C
An annular heating block d2 corresponding to the contour shape of the edge of the opening end of the container α is brought into contact with the opening end from above the lid, and the heating block heats the corresponding part of the lid, and then the sealing block ef is heated. The outer periphery of the opening end is pressed into contact with the outer periphery of the opening end.

However, in this conventional device, the heating block d is annular and the heat from its inner circumference heats the top surface of the lid, which heats the air remaining in the container and causes volumetric expansion. As the pressure inside the container increases, the lid is pushed upwards, and the lid material stretches due to heating, causing the lid to become deformed, making the product look unsightly and reducing its commercial value. .

Also, due to its structure, a seal block must be divided into multiple parts along the circumferential direction, but conventional seal blocks have flat end faces as shown in Figure 2, and there is a slight gap between adjacent seal blocks. This caused a lack of sealing pressure in the gap, causing seal failure.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lid sealing device in which a heat insulating material is provided in the center of a heating block to prevent the heating block from heating the unsealed portion of the lid, and a plurality of divided 7-ru blocks are provided. The object of the present invention is to solve the above-mentioned problems of the prior art by having the ends of the two end parts interlock with each other in a muntinous manner.

B) Structure of the Invention The present invention provides a sealing device for a container lid in which a heating block heats a lid placed over an open end of a container, and the lid is pressure-sealed to the outer periphery of the opening end of the container using a sealing block. A heat insulating material is provided in the center of the heating block in an annular shape to form an air chamber between the lid and the heat insulating material, and an air supply passage and an exhaust passage communicating with the air chamber are formed in the heat insulating material. The seal block is divided into a plurality of parts along the outer circumferential direction of the container and attached to a movable member that moves in the radial direction, and each end of the divided seal block is fitted into the end of an adjacent seal block in an interlocking manner. configured to fit.

(e) Examples Embodiments of the present invention will be described below with reference to the drawings.

3 to 6, an embodiment of a lid sealing device according to the present invention is shown. The sealing device 1 of this embodiment includes a heating mechanism 2 and a sealing mechanism 3.

The heating mechanism 2 is formed in the contour shape of the opening end of the container a (for example, in this embodiment, the container is cylindrical and the contour shape of the opening end is circular, so it is annular), and has an annular electric heater inside. 22, and a heat insulating material 23 fitted into the center of the heating block 21.

An annular projection 24 is formed on the lower end surface of the heating block 21 so as to be able to enter slightly into the open end of the container. A recess 25 is formed at the lower end (the side facing the lid C) of the heat insulating material 23 to define an air chamber.

The heat insulating material 23 further has an air supply passage 26 communicating with the recess 25.
and a plurality of exhaust passages 27 are formed therethrough. Air supply passage 26 is connected to a cooling air supply source (not shown);
It is also possible to introduce cooling air into the recess 25 through the air supply passage and to increase the pressure within the recess during heating.

The sealing mechanism 3 includes a sealing block 31 that is divided into a plurality (four in this embodiment) of the sealing block 31 along the circumferential direction of the container a. The ends of each seal block 31 are fitted together in a mating manner, as shown in FIG. Further, each seal block 31 is formed with a curved seal surface 32 corresponding to a part of the outer periphery of the open end of the container.

A fixed block 33 is disposed directly above each seal block, and a long link 34 and a short link 35 are rotatably attached to each fixed block in parallel with each other.

A movable member 36 is attached to the lower ends of the links 34 and 35, and a seal block 31 corresponding to the movable member is fixed. The upper end of each long link 34 is connected to a vertically movable block 38 via a link 37, and the vertically movable block 38 is configured to be vertically movable by a cylinder or the like.

In this sealing mechanism, when the vertically movable block 38 is moved downward from the position shown in FIG. to move the seal block 31 in the same direction. Conversely, when the vertical movement block 38 rises, the movable member and the seal block move in the opposite direction.

In the sealing device configured as described above, after the lid cf is placed over the open end of the container a, the heating mechanism 2 is lowered and the heating block 21 is
The lower end surface is brought into contact with the edge of the opening end from above the lid to heat the opening end and that part of the lid, and cooling air is introduced from the air supply passage 26 into the air chamber defined by the recess 25 and exhausted. It is discharged through the passage 27, and the central part of the lid C that does not need to be heated is forcibly cooled.

After the lid and the open end of the container are heated, the vertical movement block 3
When the plurality of seal blocks 31 are simultaneously moved radially inward toward the center of the container by lowering 8,
The seal surface 32 of the seal block 31 presses and seals the lid C onto the outer periphery of the opening end. At this time, the ends of each seal block are fitted into each other in a muntinous manner.

(f) Effects As described above, in the sealing device according to the present invention, a heat insulating material is fitted inside the heating block to prevent the lid from being heated by radiant heat from the inner circumference of the heating block, and the heat is limited by the heat insulating material. By introducing cooling air into the air chamber, the top surface of the lid C can be forcibly cooled, and if necessary, the top surface of the lid C can be made higher than atmospheric pressure, so that thermal expansion of the air trapped inside the container and It is possible to prevent deformation of the lid due to thermal expansion of the lid material, thereby preventing a decrease in product value.

In addition, since the end portions of the seal blocks are fitted together in a mating manner, it is possible to prevent insufficient sealing from occurring at the mating portions of the plurality of divided seal blocks.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a conventional lid sealing device, Fig. 2 is an enlarged view showing the structure of the end of a conventional seal block, and Fig. 3 is a diagram showing a conventional lid sealing device.
A'3 is a sectional view of the heating mechanism of the sealing device according to the present invention;
FIG. 3 [13] is a top view of FIG. 3 [A], FIG. 4 is a side view of the sealing mechanism with some parts omitted, and FIG. 5 is a line V-■ in FIG. 4. FIG. 6 is an enlarged view of the end of the seal block, FIG. 7 is an enlarged view of the sealed portion of the lid, and FIG. 8 is a sealed container. FIG. Sealing device 2: Heating mechanism 21: Heating block 23: Heat insulating material 25: 4 Part 3: Sealing mechanism 31: Seal block Patent applicant CKD Co., Ltd. Figure 5 Figure 7 Figure 8

Claims (1)

[Claims] In a container lid sealing device in which a lid placed over an open end of a container is heated with a heating block, and the lid is pressure-sealed to the outer periphery of the open end of the container with a seal block, the heating block is formed into an annular shape and the center of the heating block is heated. An air chamber is formed between the lid and the insulating material by providing a heat insulating material in the section, an air supply passage and an exhaust passage communicating with the air chamber are formed in the insulating material, and the seal block is installed in the direction of the outer circumference of the container. It is divided into multiple pieces along the line and attached to a movable member that moves in the radial direction.
A sealing device for a container lid, characterized in that each end of a divided seal block is fitted with an end of an adjacent seal block in a joint type.