JP2006316919A - Sealing method and sealing member between two objects - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method using a solventless type liquid gasket as a raw material to easily seal a joint of two articles, and to provide a sealing member formed by using a liquid gasket as a raw material. <P>SOLUTION: An annular groove 1 formed with a plurality of connected guide grooves 2 and 2a comprising appropriate closed shapes, and opened toward the outer side of a joint face is formed on the joint faces requiring sealing in two objects. The liquid gasket 4 is injected from the outer side end of either of the guide grooves 2 and 2a, and the liquid gasket 4 is distributed to the whole of the annular groove 1. Air bleeding is carried out through the other guide groove 2 or 2a, and the excessive liquid gasket 4 is spilled out of the outer side end of the guide groove 2 or 2a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sealing method between two objects using a liquid gasket having a property of curing by reacting with moisture in the air, and a sealing member.

  In the piston reciprocating gas intake / exhaust device, as schematically shown in FIG. 6, plate gaskets (22) are respectively provided on the upper surface of a cylinder (21) fitted with a piston (20) reciprocated by appropriate power. ) (23), the cylinder cover (24) and the cylinder head (25) are superposed and these are fastened with bolts (26) or the like.

  The cylinder head (25) has an intake chamber (27) and an exhaust chamber (28) arranged side by side, and through holes (29) (30) drilled in the bottom wall of each chamber (27) (28). Are communicated with a suction hole (31) and a discharge hole (32) formed in the cylinder cover (24), respectively. An intake valve (33) is provided at the lower end of the intake port (31), and a discharge valve (34) is provided on the upper surface of the through hole (30) communicating with the discharge hole (32).

  As the piston (20) reciprocates, the outside air sucked from the inlet hole (35) on the side surface of the intake chamber (27) is discharged into the through hole (29), the suction hole (31), the cylinder (21), and discharged. The gas is discharged from the outlet hole (36) on the side surface of the exhaust chamber (28) through the hole (32) and the through hole (30).

  Since the gaskets (22) and (23) are required to have heat resistance, asbestos has previously been made of asbestos. Various attempts have been made to transform.

  Among them, a silicone-based solventless liquid gasket that cures by reacting with moisture in the air and that exhibits elasticity and heat resistance even after curing is currently most preferable.

  However, as in the cylinder cover (24) and the cylinder (21) in FIG. 5, when one of the mating surfaces is a flat surface and the other is a cylindrical shape with no flesh inside, the liquid injected into the mating surface A part of the gasket overflows and hardens inside the cylinder (21) which is a cylindrical body, and the fine pieces or fine powder prevents the smooth operation of the piston (20).

  An object of the present invention is to provide a method for easily sealing a joint between two articles using a solvent-free liquid gasket as a material, and a seal member formed using the liquid gasket as a material.

According to the present invention, the above-mentioned problem is solved by the following means as described in the claims.
(1) Forming an annular groove in which a plurality of guide grooves that open toward the outside of the mating surface are continuously formed on the mating surfaces that require sealing in two objects, Liquid gasket is injected from the outer end of the guide groove, the liquid gasket is spread over the entire annular groove, and air is vented from other guide grooves, and excess liquid gasket overflows from the outer end of the guide groove. Let

(2) In the above item (1), the portion of the liquid gasket that overflows from the outer end of the guide groove to the outside is removed after being cured with time.

(3) In the above item (1), a sub-annular groove that is substantially similar to the inner side of the annular groove and communicated therewith is provided, and an excess of the liquid gasket injected from the guide groove of the outer annular groove, Overflow into the secondary annular groove.

(4) In the above item (3), the closed inner seal body connected to the plate-like seal body formed in the outer annular groove is formed with the liquid gasket overflowing into the sub annular groove.

(5) In the above (4), the inner closed annular seal body is thicker than the outer closed annular seal body by making the auxiliary annular groove deeper than the outer annular groove. And

(6) In any of the above items (3) to (5), an appropriate number of inner sub-annular grooves that are substantially similar to the sub-annular groove and communicate therewith are further provided inside the sub-annular groove.

(7) A closed annular thick seal body made of a liquid gasket is connected to the inside of a closed annular plate seal body made of a liquid gasket interposed between mating surfaces that require sealing in two objects.

Invention of Claim 1:
When the liquid gasket is press-fitted from the outer end of one of the guide grooves connected to the closed annular groove formed on one or both of the two-part mating surfaces, the liquid gasket automatically spreads over the entire annular groove. The air in the annular groove is discharged from the other guide groove, and a sealing body is formed on the mating surfaces of the two objects.

Invention according to claim 2:
From the outer end of the guide groove, the portion that protrudes to the outside and is hardened can be easily cut out or broken by a cutter or the like.

Invention according to claim 3:
The surplus portion of the liquid gasket is accumulated in the sub-annular groove and does not go outside, so that there is no need to cut off the protruding portion.

Invention according to claim 4:
Since the closed inner seal body is formed inside the plate-like seal body, the seal is more reliable.

Invention according to claim 5:
The inner annular seal body firmly receives pressure from the inner side, which is convenient when one mating surface is a cylindrical body.

Invention according to claim 6:
In the unlikely event that the liquid gasket overflows from the outer sub-annular groove, it flows into the inner sub-annular groove. Therefore, even when one mating surface is a cylindrical body, the plate gasket overflows to the inner side of the cylindrical body. The risk of flowing is very small.

Invention according to claim 7:-
In the case where one mating surface is a cylindrical body, the inner annular sealing body firmly supports pressure from the inner side.

  1 to 4 show an embodiment of the present invention. Parts similar to those of the conventional one shown in FIG. 5 are denoted by the same reference numerals, and only different points will be described.

  The present invention is applied between the upper surface of the cylinder (21) which is the mating surface and the cylinder cover (24), and between the cylinder cover (24) and the cylinder head (25).

  As shown in FIG. 1 and FIG. 2, on the upper surface of the cylinder (21) which is one of the mating surfaces and on the upper surface of the cylinder cover (24), as shown in FIG. 2 and FIG. An annular groove (1) is formed, and an appropriate number of guide grooves (2) and (2a) whose outer ends are opened are continuously provided at appropriate positions of the annular groove (1).

  From one guide groove (2a), the liquid gasket (4) is injected into the annular groove (1) by the injector (3), and accordingly, the air in the annular groove (1) from the other guide groove (2). Is discharged and excess liquid gasket (4) is overflowed.

  The overflowing liquid gasket (4) is cut with an appropriate blade after waiting for hardening.

  4 and 5 show a small sub-annular groove (5) of a similar size concentrically provided inside the annular groove (1) on the upper surface of the cylinder (21). The sub-annular groove (5) may be formed integrally with the annular groove (1), or may be communicated with each other through an appropriate communication groove (2b).

It is a longitudinal cross-sectional view which shows one Embodiment of this invention. It is the II-II line cross-sectional view in FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. It is a figure which shows only the principal part of the figure similar to FIG. 1 which shows a different example. FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. It is a longitudinal cross-sectional view which shows the example of the mating surface to which this invention is applied.

Explanation of symbols

(1) Annular groove
(2) (2a) Guide groove
(2b) Communication groove
(3) Injector
(4) Liquid gasket
(5) Secondary annular groove
(6) Inner secondary annular groove
(20) Piston
(21) Cylinder
(22) (23) Gasket
(24) Cylinder cover
(25) Cylinder head
(26) Bolt
(27) Intake chamber
(28) Exhaust chamber
(29) (30) Through hole
(31) Suction hole
(32) Discharge hole
(33) Intake valve
(34) Discharge valve
(35) Inlet hole
(36) Outlet hole

Claims (7)

  An annular groove in which a plurality of guide grooves that open toward the outer side of the mating surface is formed on the mating surface that needs to be sealed in the two objects and that is open toward the outside of the mating surface is formed. The liquid gasket is injected from the outer end, the liquid gasket is spread over the entire annular groove, and air is vented from the other guide groove, and the excess liquid gasket is allowed to overflow from the outer end of the guide groove. A method of sealing between two objects characterized.   2. The method for sealing between two objects according to claim 1, wherein a portion of the liquid gasket that overflows from the outer end of the guide groove to the outside is removed after being cured with time.   A sub-annular groove communicating with the sub-groove is formed on the inner side of the annular groove, and the excess liquid gasket injected from the guide groove of the outer annular groove overflows into the sub-annular groove. The method for sealing between two objects according to claim 1, wherein:   4. The seal between two objects according to claim 3, wherein a closed inner seal body connected to a plate-like seal body formed in the outer annular groove is formed with a liquid gasket overflowing into the sub annular groove. Method.   5. The secondary annular groove is deeper than the outer annular groove, so that the inner closed annular seal body is thicker than the outer closed annular seal body. The sealing method between two objects as described.   6. The inter-object body according to claim 3, further comprising an appropriate number of inner sub-annular grooves that are substantially similar to the inner side of the sub-annular groove and communicate with the groove. Sealing method. A closed annular thick seal body made of a liquid gasket is continuously provided inside a closed annular plate-like seal body made of a liquid gasket interposed between mating surfaces that require sealing in two objects. Seal member.

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