JP2003074764A - Joint gasket installation structure and gasket retainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint gasket installation structure and a gasket retainer allowing easy installation to a circumferential groove of a block. SOLUTION: This gasket retainer 10 retains a joint gasket 16 and a guide ring 17 positioned in the block 101 formed with the circumferential groove 101a in the periphery of a flow passage hole. The gasket retainer 10 has gasket retention claws 13 disposed in three equiangular positions to press and retain a small diameter part 16a of a step difference formed in the periphery of the joint gasket 16; flange installation claws 12 disposed in three equiangular positions to press the inner-side inner face of the circumferential groove 101a; and guide ring retention claws 14 disposed in three equiangular positions to press the inner face of the gasket ring 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint gasket mounting structure and a gasket retainer for sealing and connecting flow paths formed on the end faces of blocks.

[0002]

2. Description of the Related Art Conventionally, a joint used to jointly fasten two blocks in which a circumferential groove is formed on the outer periphery of a flow path hole and seal and connect the flow path holes of the two blocks. A gasket mounting structure is known. For example, in Japanese Unexamined Patent Application Publication No. 11-280967, as shown in FIG. 7, a gasket 105 having a step on the outer circumference, a guide ring 103 fitted in a circumferential groove 101a formed in a block 101, A gasket retainer 104 is described which holds the gasket 105 inside and the gasket ring 103 outside.

Japanese Patent Laid-Open No. 102242/1998 discloses a detailed structure of the gasket 105 and the gasket retainer 104. As shown in FIG. 8, the gasket retainer 104 has four gasket holding claws 108 formed at four positions for holding the gasket 105.
A pair of guide ring holding claws 107 for holding the gasket ring 103, and the gasket retainer 104.
And a pair of flange assembling claws 106 for engaging with the circumferential groove 101a of the block 101. Next, the operation of the joint gasket mounting structure having the above configuration will be described. With the gasket holding claw 108 of the gasket retainer 104 holding the gasket 105 shown in FIG. 8 in advance and the guide ring holding claw 107 holding the guide ring 103, the gasket retainer 10
The flange assembly claw 106 of No. 4 is engaged with the inner inner surface of the circumferential groove 101a of the block 101.

[0004]

However, the conventional joint gasket mounting structure and gasket retainer have the following problems. (1) Since there are only two guide ring holding claws 107 that hold the guide ring 103, the gasket retainer 104 may tilt in the guide ring 103, and the position of the flange assembling claw 106 becomes inaccurate. At this time, as shown in FIG. 9, there was a problem that the tip of the flange assembling claw 106 was caught in the inlet of the inner surface of the circumferential groove 101a of the block 101, resulting in defective mounting. In particular, the flange assembly claw 106 and the guide ring holding claw 107
And are formed in the same position but in different directions, and are therefore susceptible to mutual deformation. Therefore, in order to keep the flange holding claw 106 in a predetermined shape, the guide ring 10
After assembling the gasket retainer 104 to 3, it is necessary to secure sufficient clearance between the guide ring 103 and the guide ring holding claw 107 so that the guide ring holding claw 107 is not deformed by the guide ring 103. This also caused the inclination.

(2) One gasket retainer 104
Then, it is necessary to assemble it in the circumferential groove 101a of the block 101 while holding the gasket 105 and the gasket ring 103. However, by holding the gasket 105 and the guide ring 103, the gasket retainer 104 is deformed, In some cases, the circumferential groove 101a could not be mounted accurately. (3) Further, since the tip of the flange assembling claw 106 remains punched by the press working, there is a problem that it is more easily caught.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a joint gasket mounting structure and a gasket retainer that can be easily mounted in the circumferential groove of a block. .

[0007]

The joint gasket mounting structure of the present invention has the following structure. (1) In a joint gasket mounting structure used for a joint that seals and connects the flow path holes of two blocks when the two blocks in which a circumferential groove is formed on the outer periphery of the flow path hole are closely attached and fastened , (A) a gasket having a flow path hole formed in the center, (b) a gasket ring whose outer periphery is fitted to the outer inner surface of the circumferential groove, and (c) for pressing and holding the outer peripheral portion of the gasket, etc. Gasket holding claws arranged at three positions at angular positions, flange assembly claws arranged at three positions at equiangular positions for pressing the inner inner surface of the circumferential groove, and equiangular for pressing the inner surface of the guide ring. And a gasket retainer having guide ring holding claws arranged at three positions.

(2) In the joint gasket mounting structure described in (1), the three gasket holding claws and the three flange assembling claws are alternately and equiangularly arranged. (3) In the joint gasket mounting structure according to (1) or (2), the three gasket holding claws and the three
The two guide ring holding claws are arranged at the same position but in different directions. (4) In one of the joint gasket mounting structures described in (1) to (3), the R shape is formed on the inside by slightly bending the tip end of the flange assembly claw outward. Characterize.

The gasket retainer of the present invention has the following structure. (5) In a gasket retainer which holds a joint gasket and a guide ring which is positioned in a block in which a circumferential groove is formed on the outer periphery of the flow passage hole, the outer periphery of the joint gasket is pressed and held at an equiangular position. Gasket retaining claws arranged at three positions, and flange assembly claws arranged at three positions in an equiangular position to press the inner surface of the circumferential groove.
In order to press the inner surface of the gasket ring, there are three guide ring holding claws arranged at equiangular positions.

(6) The gasket retainer described in (5) is characterized in that the three gasket holding claws and the three flange assembling claws are alternately and equiangularly arranged. (7) In the gasket retainer described in (5) or (6), the three gasket holding claws and the three guide ring holding claws are arranged at the same position but in different directions. (8) One of the gasket retainers described in (5) to (7) is characterized in that the front end of the flange mounting claw is formed with an R shape inside.

The joint gasket mounting structure and the gasket retainer having the above structure operate as follows. Since the guide ring is held by the gasket ring holding pawls that are arranged at three equiangular positions on the gasket retainer, the gasket retainer does not tilt in the guide ring, and the flange retainer pawl of the gasket retainer accurately Can be installed in the circumferential groove of the block. Further, since the small diameter portion due to the step of the gasket is held by the gasket holding claws which are arranged at three equiangular positions of the gasket retainer, the gasket can be accurately positioned and held with respect to the center line of the gasket retainer.

Particularly, since the three gasket holding claws and the three flange assembling claws are alternately and equiangularly arranged, the gasket can be accurately positioned with respect to the circumferential groove of the block. It is possible to accurately position around the flow path hole formed in. Further, the three guide ring holding claws and the three gasket holding claws are arranged at the same position and in the opposite direction, and the three flange assembly claws are arranged at the farthest positions from the three guide ring holding claws. Therefore, even if the guide ring holding claw is deformed after the guide ring is assembled, it is possible to minimize the influence of the flange assembled claw. For this reason, a clearance after assembling the guide ring holding claw and the guide ring is unnecessary, and play can be reduced, so that the occurrence of mounting failure can be reduced. In addition, since the R shape is formed inside by slightly bending the tip end of the flange assembly claw outward, even if the gasket retainer slightly tilts in the guide ring, the R portion guides, The tip of the flange retainer pawl of the gasket retainer does not get caught in the circumferential groove.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 shows the gasket retainer 10
Indicates. (A) is a plan view of the gasket retainer 10, (b) is a right side view thereof, and (c) is A of (a).
FIG. A cylindrical skirt 15 is formed on the gasket retainer 10, and guide ring holding claws 14 that are slightly bent outward are formed at three positions on the circumference at 120 ° equiangular positions. Gasket retainer 10
On the opposite side of the same position as the guide ring holding claw 14, 1
Three gasket holding claws 13 are formed at 20 ° equiangular positions.

Three flange assembly claws 12 are formed at 120 ° equiangular positions, which are intermediate positions of the gasket holding claws 13. The height of the flange assembly pawl 12 is about 2.5 to 3.5 times the height of the gasket holding pawl 13. Notches 12b are formed on both sides of the root of the flange assembling claw 12. The tip of the flange assembly claw 12 is slightly bent outward and forms a so-called nose 12a. The shape of the gasket 16 is shown in FIG. (B) is a plan view and (a) is a central sectional view thereof. On the outer periphery of the gasket 16, a small diameter portion 16a is formed by a step. Guide ring 17
The shape of is shown in the central sectional view in FIG.

Next, the mounting structure of the gasket retainer 10, the gasket 16, and the guide ring 17 having the above-mentioned structure will be described. As shown in FIG. 4, the worker performs the external work by holding the gasket 16 inside the gasket retainer 10 by the gasket holding claw 13 of the gasket retainer 10 and the guide ring 17 by the guide ring holding claw of the gasket retainer 10. It is held outside the gasket retainer 10 by 14. And
Grasping the outside of the guide ring 17, as shown in FIG.
The guide ring 17 is attached so that the outer periphery of the guide ring 17 is fitted to the outer inner surface of the circumferential groove 101a of the upper block 101, and the upper block 101 is brought into contact with the lower block 102 in this state.

Here, the gasket 16 and the guide ring 1
7 and the gasket retainer 10 assembled into the assembly,
When the operator grips the guide ring and mounts it in the circumferential groove 101a of the upper block 101, the guide ring 17
Are held by the guide ring holding claws 14 arranged at three equiangular positions on the gasket retainer 10, so that the gasket retainer 10 does not tilt in the guide ring 17 and the flange retainer claws of the gasket retainer 10 do not tilt. 12 accurately indicates the circumferential groove 10 of the upper block 101.
It can be assembled to 1a. Further, since the gasket retaining claws 13 arranged at three equiangular positions of the gasket retainer 10 hold the small diameter portion due to the step of the gasket 16, the gasket 16 is accurately positioned with respect to the center line of the gasket retainer 10. And can hold.

Particularly, since the three gasket holding claws 13 and the three flange assembling claws 12 are alternately and equiangularly arranged, the gasket 16 is accurately positioned with respect to the circumferential groove 101a of the upper block 101. Therefore, the gasket 16 can be accurately positioned around the flow path holes formed in the blocks 101 and 102. Further, the three guide ring holding claws 14 and the three gasket holding claws 13 are arranged at the same position and in the opposite directions, and the three flange assembly claws 1 are provided.
Since 2 is arranged at the farthest position from the three guide ring holding claws 14, even if the guide ring holding claws 14 are deformed after being assembled to the guide ring 17, the flange holding claws 12 are most affected. Can be reduced. Therefore, the clearance after the assembling of the guide ring holding claw 14 and the guide ring 17 is unnecessary, and the rattling is eliminated, so that the occurrence of mounting failure can be reduced. Further, since the nose 12a having the R shape is formed inside by slightly bending the tip end portion of the flange assembling claw 12 outward, even if the gasket retainer 10 is slightly inclined in the guide ring 17, Since the R part guides, the flange retainer claw 1 of the gasket retainer 10
2 does not get caught in the circumferential groove 101a.

After being assembled in the state shown in FIG. 4, by fastening the upper block 101 to the lower block 102, as shown in FIG. 5, a convex portion 101b formed on the outer periphery of the flow path of the upper block 101. , And the convex portion 102b formed on the outer periphery of the flow path of the lower block 102 bites into the end surface of the gasket 16 to form a seal around the flow path.

As described in detail above, according to the joint gasket mounting structure of the present embodiment, when the two blocks 101, 102 having the circumferential groove formed on the outer periphery of the flow path hole are closely contacted and fastened. In a joint gasket mounting structure used for a joint that seals and connects the flow path holes of the two blocks 101 and 102, (a) a gasket 16 having a step 16a formed on the outer periphery and (b) a circumferential groove formed on the outer periphery. 10
A gasket ring 17 fitted to the outer inner surface of 1a,
(C) Gasket holding claws 13 arranged at three equiangular positions to press and hold the small diameter portion 16a due to the step of the gasket 16, and three places at equiangular positions to press the inner inner surface of the circumferential groove 101a. The flange retainer claw 12 and the gasket retainer 10 having the guide ring holding claws 14 arranged at three equiangular positions for pressing the inner surface of the guide ring 17 are provided.
The gasket retainer 10 does not incline in the inside, and can be accurately assembled in the circumferential groove 101a of the block 101 by the flange assembling claws 12 of the gasket retainer 10.

Further, according to the gasket retainer 10 of the present invention, the gasket retainer 10 which holds the guide ring 17 positioned on the block 101 having the circumferential groove 101a formed on the outer periphery of the flow path hole and the joint gasket 16 is provided.
In order to press and hold the small diameter portion 16a due to the step formed on the outer periphery of the joint gasket 16, the gasket retaining pawls 13 arranged at three equiangular positions and the circumferential groove 101a.
Has three flange assembly claws 12 arranged at equiangular positions to press the inner surface of the inner surface of the gasket, and guide ring holding claws 14 arranged at three positions at equiangular positions to press the inner surface of the gasket ring 17. Therefore, the gasket retainer 10 does not incline in the guide ring 17, and the flange retainer claw 12 of the gasket retainer 10 can accurately assemble the gasket retainer 10 into the circumferential groove 101a of the block 101.

Further, three gasket holding claws 13 and three
Since the two flange assembling claws 12 are alternately and equiangularly arranged, the gasket 16 can be accurately positioned with respect to the circumferential groove of the block. Can be accurately positioned. Further, the three guide ring holding claws 14 and the three gasket holding claws 13 are arranged at the same position and in opposite directions,
Since the three flange assembling claws 12 are arranged at the most distant position from the three guide ring holding claws 14, when the operator grips the guide ring 17, the influence of the three flange assembling claws 12 is exerted. Can be minimized, and the occurrence of mounting failure due to the deformation of the flange assembling claw 12 can be reduced.

Further, since the nose 12a having an R shape is formed inside by slightly bending the tip end of the flange assembling claw 12 outward, even if the gasket retainer is slightly inclined in the guide ring. However, since the R portion guides, the gasket retainer does not get caught in the circumferential groove.

The present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention. For example, in the present embodiment, Nozomi 12a
Although the R shape is used as the above, it is the same if the nose is formed by a straight line or another curved line. Further, in the present embodiment, the case where there is a step on the outer periphery of the gasket has been described, but the same applies to a case where there is no step.

[0024]

According to the joint gasket mounting structure of the present invention, when the two blocks having the circumferential groove formed on the outer periphery of the flow path hole are tightly attached and fastened, the flow path holes of the two blocks are connected to each other. In a joint gasket mounting structure used for a joint for sealing and connection, (a) a gasket having a step formed on the outer periphery, (b) a gasket ring having an outer periphery fitted to the outer inner surface of the circumferential groove, (c) ) Gasket holding claws arranged at three equiangular positions in order to press and hold the small diameter part due to the step of the gasket, and flange assembly arranged in three equiangular positions to press the inner surface of the circumferential groove. Since the gasket retainer includes the pawl and the guide ring holding pawls arranged at three equiangular positions to press the inner surface of the guide ring, the gasket retainer is provided in the guide ring. Without Na tilts, it can be assembled in a circumferential groove of accurately blocked by a flange assembly claws of the gasket retainer.

Further, according to the gasket retainer of the present invention, in the gasket retainer which holds the joint gasket and the guide ring which is positioned in the block in which the circumferential groove is formed on the outer periphery of the flow passage hole, Gasket holding claws arranged at three equiangular positions to press and hold a small-diameter portion due to a step formed on the outer circumference, and flange sets arranged at three equiangular positions to press the inner surface of the circumferential groove. Since the claws and the guide ring holding claws arranged at three equiangular positions for pressing the inner surface of the gasket ring are provided, the gasket retainer does not tilt in the guide ring, and The flange assembly claw allows accurate assembly in the circumferential groove of the block.

[Brief description of drawings]

FIG. 1 is a trihedral view showing the shape of a gasket retainer 10 of the present invention.

FIG. 2 is a view showing a shape of a gasket 16.

FIG. 3 is a sectional view of a guide ring 17.

FIG. 4 is a cross-sectional view showing a state in which the gasket retainer 10 of the present invention holds a gasket 16 and a guide ring 17.

FIG. 5 is a sectional view showing a joint gasket mounting structure of the present invention before tightening.

FIG. 6 is a sectional view showing a joint gasket mounting structure of the present invention after tightening.

FIG. 7 is a cross-sectional view showing a conventional joint gasket mounting structure.

FIG. 8 is a perspective view showing a conventional gasket retainer 104 and a gasket 105.

FIG. 9 is a view for explaining a problem of a conventional joint gasket mounting structure.

[Explanation of symbols]

10 Gasket retainer 12 Claws with flange assembly 12a Nozomi 13 Gasket holding claw 14 Guide ring holding claw 16 gasket 17 Guide ring 101 upper block 101a circumferential groove

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshikazu Miwa             850, Horinouchi Town, Kasugai City, Aichi Prefecture             Hardy Co., Ltd. Kasugai Office (72) Inventor Masayoshi Morimoto             850, Horinouchi Town, Kasugai City, Aichi Prefecture             Hardy Co., Ltd. Kasugai Office F term (reference) 3J040 AA01 AA12 BA03 HA09

Claims (8)

[Claims] 1. A joint gasket mounting used for a joint for sealing and connecting flow passage holes of two blocks when the two blocks having a circumferential groove formed on the outer periphery of the flow passage hole are closely contacted and fastened. In the structure, a gasket having a flow path hole formed in the center, a guide ring having an outer periphery fitted to the outer inner surface of the circumferential groove, and three places arranged at an equiangular position to press and hold the outer peripheral portion of the gasket. And the flange holding claws arranged at three equiangular positions for pressing the inner surface of the circumferential groove, and the three parts arranged at equiangular positions for pressing the inner surface of the guide ring. And a gasket retainer provided with a guide ring holding claw, and a joint gasket mounting structure. 2. The joint gasket mounting structure according to claim 1, wherein the three gasket retaining pawls and the three flange assembling pawls are alternately and equiangularly arranged. Mounting structure. 3. The joint gasket mounting structure according to claim 1, wherein the three gasket holding claws and the three guide ring holding claws are arranged at the same position but in different directions. Characteristic joint gasket mounting structure. 4. The joint gasket mounting structure according to any one of claims 1 to 3, wherein an R shape is formed inside by slightly bending the tip end portion of the flange assembling claw outward. A joint gasket mounting structure characterized in that 5. A gasket retainer for holding a joint gasket and a guide ring positioned in a block having a circumferential groove formed on the outer periphery of the flow passage hole, wherein the outer periphery of the joint gasket is pressed and held at an equal angle. Gasket holding claws arranged at three positions, flange mounting claws arranged at three positions equiangular to press the inner surface of the circumferential groove, and equiangular positions pressing the inner surface of the guide ring. A gasket retainer characterized in that it has guide ring holding claws arranged at three positions. 6. The gasket retainer according to claim 5, wherein the three gasket retaining claws and the three flange assembling claws are alternately and equiangularly arranged. 7. The gasket retainer according to claim 5, wherein the three gasket holding claws and the three guide ring holding claws are arranged at the same position but in different directions. Gasket retainer to be used. 8. The gasket retainer according to any one of claims 5 to 7, wherein an R shape is formed inside by slightly bending the tip end portion of the flange assembly pawl outward. Characteristic gasket retainer.