JPS6252060A - Sealing device for hermetic sealing - 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] [Technical Field of the Invention] The present invention relates to a sealing device for sealing liquids, granules, and powders in a state that is isolated from the outside air in order to avoid moisture, dust, and other influences from the outside air. This invention relates to a sealing device that has an extremely strong sealing force in a removably sealed part of a sealed container in which other items are housed.

[Technical background of the invention and its problems] C has traditionally been used in physical and chemical, medical, commercial kitchen, and other fields
Various airtight containers are used to store various liquids, granules, powders, etc. in a hermetically sealed state in order to protect them from moisture, dust, and other influences from the outside air. The sealing performance of the container made of metal is enhanced through packing made of elastic material at the front end of the container.

The material for this packing is a synthetic rubber material such as silicone rubber, which has excellent heat resistance, cold resistance, durability, and low toxicity, and is also scientifically inert and does not alter metals or other organic substances. It is often used. However, this kind of material, for example silicone rubber, has a shrinkage rate of about 30%, so when the packing is tightened from the outside of the container, the packing contracts and causes damage inside the container. There was a risk that it would fall off. Also,
If the packing is not tightened evenly, the sealing force will be uneven and the sealing effect will be halved, creating the trouble of having to pay close attention to the tightening process. On the other hand, in order to avoid these inconveniences, there are some types of sealed containers in which packing is fixed to a part of the container; however, in such sealed containers, the fixed packing prevents cleaning of the container, and If the packing cannot be replaced, this has a major disadvantage in that the life of the container is determined by the life of the packing itself.

[Object of the Invention] Therefore, in order to solve the above-mentioned drawbacks and inconveniences, this invention prevents the packing from falling off unexpectedly during use, and
The object of the present invention is to provide a sealing device that can be easily tightened evenly and can significantly increase the sealing effect.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention forms a loop-shaped synthetic rubber packing in a sealing device that is detachably attached to the sealing part of a predetermined sealed container. By integrally forming a shrinkage preventer that biases the packing in the centrifugal direction along the circumferential direction of the packing, and coating the surface of this shrinkage preventer with a synthetic rubber material,
We succeeded in easily and effectively sealing a closed container.

[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 shown in the figure is a loop-shaped packing made of synthetic rubber, and this packing 1 is integrally provided with a similarly loop-shaped shrinkage prevention body 2 along its circumferential direction, and the packing 1 itself is attached in the centrifugal direction. It is a force. Then, the surface of this shrinkage prevention body 2 is covered with a synthetic rubber material S (see Fig. 3).
. The illustrated shrinkage preventive body 2 is made of a coil spring material that uses a coil spring filled with the same material as the packing material, and the shrinkage preventive body 2 is made of a silicone rubber material. Synthetic rubber material S
It is filled with. By doing so, the integration of the packing 1 and the anti-shrinkage body 2 becomes more familiar. On this occasion,
In addition to silicone rubber, NB can be used as a material for the synthetic rubber material S.
It is also possible to use materials such as R, CR (neobrene), or python, and these materials do not necessarily have to have elasticity. Moreover, by embedding a part or the whole of the shrinkage preventive body 2 inside the packing 1, the packing 1 and the shrinkage preventive body 2 can be brought into close contact with each other, which is convenient for integral formation. Therefore, as shown in FIG. 2, a groove 1A having a cross-sectional shape of a square cross section is provided on the inner peripheral surface of the loop of the packing 1, and a groove 1B is further provided at the bottom of this groove 1A, so that the outer circumference of the shrinkage prevention body 2 is provided. By embedding the surface in the grooved strip 1B and covering the inner circumferential surface of the shrinkage prevention body 2 protruding from the grooved strip 1B with a synthetic rubber material S, extremely tight integration is achieved. In addition, the outer circumferential surface of the packing 1 is adapted to the shape of a flange 7 formed on a body 6 of a sealed container 3, which will be described later, and the joint portions of a lid body 4 and a bottom body 5 attached to this sealed container 3. , is a comb that is easily clamped between the upper and lower flanges 7. By providing the packing 1 and the anti-shrinkage body 2 in this way, the anti-shrinkage body 2 acts as a core body of the packing 1, and the withstand pressure against pressure from the vertical direction can be significantly increased. The flexible swing range is extremely wide, making it extremely suitable as a sealing device. In addition to the coil spring, it is also possible to use a plate spring of r14$1 as the shrinkage prevention body 2.

On the other hand, the airtight container using the sealing device of the present invention is intended to be a pressurized tank consisting of a cylindrical body 6, a lid body 4 and a bottom body 5 which are removably attached to the upper and lower open ends of this body 6. . Then, two pairs of opposing flanges 7 are formed at the upper and lower opening ends of the body 6 and the joint parts of the lid body 4 and the bottom body 5 that are joined to these opening ends, respectively, so that the upper and lower pairs of flanges 7 are formed. The packing 1 is removably clamped within the flange 7. By configuring the airtight container 3 in this way,
There are advantages such as cleaning the inside of the container and making storage/transportation easier. At this time, each part of the airtight container 3 is fixed by
The packing 1 is tightened by a ring-shaped tightening band 8 which is removably fitted to the outer circumferential surface of the pair of upper and lower 7 run shifters that sandwich the packing 1. The illustrated tightening band 8 is constructed by connecting both ends of a surrounding frame 8A, which is made of a band plate with a chevron-shaped cross section and having grooves on its inner circumferential surface, using a tightening tool 8B so as to be able to be tightened and released. Furthermore, a locking mechanism 8c for safety is provided at the tip of the tightening tool 8B to prevent the tightening device from returning to the open position after tightening.

Therefore, the method of using the present invention is to sandwich the packing 1 between the opposing flanges 7 of the airtight container 3, fit the outer circumferential surface of the flanges 7 onto the inner circumferential surface of the tightening band 8, and , tighten the flange 7 to seal the container.

[Effects of the Invention] By configuring the present invention as described above, it is possible to prevent the removable packing from accidentally falling off, to facilitate uniform tightening, and to significantly increase the sealing effect. .

That is, in a sealing device that is detachably attached to the sealed part of a predetermined sealed container, a synthetic rubber packing 1 having a loop shape is formed, and a shrinkage prevention body 2 that biases this packing 1 in the centrifugal direction is attached to the packing. 1 along the circumferential direction, and the surface of this shrinkage preventive body 2 is coated with synthetic rubber material S.
A shrinkage preventer 2 prevents the packing 1 from shrinking. therefore,
The outside of the removable airtight container 3 can be seen, and when the packing 1 is tightened, the packing 1 can be prevented from falling off.

Moreover, the shrinkage prevention body 2 is added to the synthetic rubber material S of the packing 1.
Because the biasing forces in the centrifugal direction are closely harmonized, a state of tension that tends to expand uniformly in the direction of the outer periphery can be maintained at all times.
The tightening eliminates the possibility of uneven tightening of the packing 1 due to work, achieves a reliable sealing effect, and has the effect of increasing the efficiency of the tightening work.

In addition, since the shrinkage preventer 2 is coated with synthetic rubber material S, the shrinkage preventer 2 itself becomes chemically inert, preventing corrosion and deterioration of the shrinkage preventer 2, making it extremely durable. Become.

Furthermore, since the shrinkage preventive body 2 covers the weak tear strength, which is a disadvantage of the synthetic rubber material S, even if the packing 1 is in close contact with the joint part of the container after use, it is easy to grasp the shrinkage preventive body 2 and remove it. It is possible to forcefully separate the packing 1, and it is extremely easy to handle it as a removable packing 1.

As described above, according to the present invention, the removable packing can be prevented from falling off during use, and it can be easily tightened evenly. Furthermore, the sealing effect can be significantly increased, and it has excellent durability. It has the following effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an exploded perspective view showing the state of use, FIG. 2 is a sectional view, FIG. 3 is an enlarged sectional view of the main part, and FIG. 4 is a side view. be. S...Synthetic rubber material, 1...Packing, 1A...Groove, 1B...Concave strip,
2... Shrinkage prevention body, 3... Airtight container, 4... Lid body, 5... Bottom body, 6... Body, 7... Flange, 8
... Tightening band, 8A... Surrounding frame, 8B... Tightening tool, 8C... Locking mechanism.

Claims (1)

[Claims] 1. In a sealing device that is removably attached to the sealed portion of a predetermined sealed container, a synthetic rubber packing having a loop shape is formed and the packing is biased in the centrifugal direction to prevent shrinkage. 1. A sealing device characterized in that a body is integrally formed along the circumferential direction of a packing, and the surface of the shrinkage prevention body is coated with a synthetic rubber material. 2. The sealing device according to claim 1, wherein the shrinkage prevention body uses a coil spring filled with the same material as the packing material. 3. The sealing device according to claim 1 or 2, wherein the packing is made of a silicone rubber material. 4. The sealed container consists of a pressurized tank, and is formed at the upper and lower open ends of the cylindrical body constituting the pressurized tank, and at the respective joint parts of the lid body and the bottom body that are removably connected to the open ends, respectively. The hermetic sealing device according to claim 1, 2, or 3, wherein a packing is removably sandwiched between two pairs of flanges facing each other. 5. The packing is tightened by a ring-shaped tightening band that is removably fitted to the outer peripheral surfaces of a pair of upper and lower flanges that sandwich the packing. The hermetic sealing device according to item 4.