JPH09126384A - Sealing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide formation for quickly carrying out work for liquidtightly sealing an opened part such as a cable laying whole. SOLUTION: A bolt 6 is severally loosely fitted in bolt inserting through holes 8, 9 drilled on both end plates 3, 4, and moreover since the neck part 6 of the bolt 6 and the one end plate 3 mutually come into slidable contact through a convex and a concave face, and a nut 7 and the another end plate 4 mutually come into slidable contact through a convex and a concave face, the bolt 6 and the nut 7 can freely tilt to both end plates 3, 4 within the range of the spherical face.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal for liquid-tightly sealing an opening of a laying pipe for laying various cables or an opening such as a cable laying hole bored in a wall surface of a building. Regarding the device.

[0002]

2. Description of the Related Art Conventionally, a sealing device of this kind has been disclosed in Japanese Utility Model Laid-Open No. 58.
No. 161293. This is that a seal rubber is interposed between two parallel fastening metal fittings (end plates) fitted in the mouth of a protective pipe to be sealed, and a bolt and a nut are used to attach the seal rubber via both the fastening metal fittings. By pressing, the outer peripheral edge portion of the seal rubber is brought into close contact with the inner peripheral surface of the pipe mouth to seal the pipe mouth.

[0003]

However, the above-mentioned conventional device is a system in which the sealing rubber is pressed through both tightening fittings by tightening the bolt and the nut to seal the pipe opening.

In such a system, in order to maintain a predetermined sealing performance (a necessary holding force at the pipe opening and a pressing force of the seal rubber), the number of bolts arranged is necessarily large. In addition, regarding the relationship between the bolt and the nut, if the axes of the bolt and the nut do not match, an interference (caulking) phenomenon occurs at the fastening portion between the bolt and the nut, and in the worst case, seizure occurs.

By the way, in order to quickly perform the work in this type of sealing device, it is necessary to perform the fastening work of the bolt and the nut quickly. The tightening work of the bolts and nuts must be performed so that the tightening amounts of the bolts and nuts are equal, that is, both tightening fittings are maintained in parallel with each other.

However, when attempting to fasten the bolts and nuts quickly, there is a tendency for the amount of bolts and nuts tightened per bolt to be increased. As a result, both fastening members are in a non-parallel state, and as described above, the interference (caulking) phenomenon occurs at the fastening portion between the bolt and the nut.

For this reason, when the bolts and nuts are tightened, the bolts and nuts are tightened in equal amounts, that is, in order to keep the two clamps in parallel with each other. It is necessary to pay close attention to tighten the screws gradually (in small steps).
Therefore, it is difficult to fasten the bolts and nuts quickly, and it is difficult to quickly perform the work in this type of sealing device.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the above-mentioned prior art, and its object is to fasten the bolt and nut tightening work. Also, it is an object of the present invention to provide a sealing device capable of performing work quickly without causing an interference phenomenon at a fastening portion between a bolt and a nut.

[0009]

In order to achieve the above object, a sealing device according to claim 1 of the present invention comprises an elastic material between two parallel end plates fitted in an opening to be sealed. And a plurality of bolts and nuts are tightened to press the seal member through the both end plates to bring the outer peripheral edge portion of the seal member into close contact with the inner peripheral surface of the opening. In the sealing device that seals the opening, the bolt is loosely fitted in the bolt insertion hole formed in the both end plates, and the head of the bolt and the one end plate slide on each other via a spherical surface. The nut and the other end plate are slidably contacted with each other via a spherical surface.

In order to achieve the same object, a sealing device according to a second aspect of the present invention is the sealing device according to the first aspect, wherein the bolt has a piece having a convex spherical surface fitted to the head side. , The one end plate is provided with a concave spherical surface into which the convex spherical surface fits, the nut is provided with a convex spherical surface on one side surface, and the other end plate is provided with a convex spherical surface of the nut. It is characterized in that a concave spherical surface for fitting is provided.

The bolt is loosely fitted in a bolt insertion hole formed in the both end plates, and the head of the bolt and the one end plate slidably contact each other through a spherical surface, and the nut and the nut are connected together. Since the other end plate is in slidable contact with each other via the spherical surface, even if both end plates become non-parallel due to uneven tightening of the bolt and nut, It freely tilts in the range of the sphere. As a result, even if the bolt and nut are fastened, the fastening operation between the bolt and nut does not cause an interference phenomenon and the work can be performed quickly.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 is a partially sectional side view showing a configuration of a sealing device according to an embodiment of the present invention, FIG. 2 is a view taken along arrow A of FIG. 1, and FIG. 3 is a view taken along arrow B of FIG. Is. In each of the drawings, 1 is a sealing device of the present invention, which includes two end plates 3 and 4 fitted into an opening 2 to be sealed (a cable laying hole or the like bored in a wall surface of a building) 2. , A seal member 5 made of an elastic material interposed between these end plates 3 and 4
And a plurality of (12 in the present embodiment) bolts 6 and nuts 7 that press the seal member 5 via both end plates 3 and 4.
Consists of

Both end plates 3 and 4 are disc-shaped and made of stainless steel or the like. One end plate 3 is inside when fitted into the opening 2, and the other end plate 4 is outside when fitted into the opening 2. A plurality of bolt insertion holes 8 into which the bolts 6 are loosely fitted in the end plate 3 at regular intervals in the circumferential direction.
Are drilled. Further, the other end plate 4 is provided with a plurality of bolt insertion holes 9 in which the bolts 6 are loosely fitted at regular intervals in the circumferential direction.

The seal member 5 has a plurality of (three in the present embodiment) ring-shaped rubber packings 10, 11 and 12, and these rubber packings 10 to 12 are laminated on each other to both end plates. It is arranged between 3 and 4. The rubber packings 10 and 12 on both sides have the same structure, and the hardness of the rubber packing 11 at the center is set to be lower than the hardness of the rubber packings 10 and 12 on both sides. Further, the outer diameters of the central rubber packing 11 on both sides of the intermediate portion are set to be smaller than the outer diameters of the rubber packings 10, 12 on both sides. Further, the inner diameters of the central rubber packing 11 on both sides of the intermediate portion are set to be larger than the inner diameters of the rubber packings 10, 12 on both sides. Elastomers 13 and 14 are provided on the inner and outer peripheral surfaces on both sides of the middle portion of the rubber packing 11 in the central portion so as to have the same inner and outer diameters as the rubber packings 10 and 12 on both sides. Rubber packing 1
The rubber as the constituent material of 0 to 12 is preferably a relatively soft rubber containing an independent foaming sponge or the like. In the rubber packings 10 to 12, bolt insertion holes 8 and 9 of both end plates 3 and 4 are provided.
Bolt insertion holes 15a, 15b, and 15c that are aligned with are formed.

The bolt 6 has a head portion 6a at one end and a male screw portion 6b at the other end. A piece 16 is fitted on the head 6a side of the bolt 6. The piece 16 has a convex spherical surface (hemispherical surface) 16a as shown in FIG. A concave spherical surface (hemispherical surface) 17 is provided concentrically with each bolt insertion hole 8 on the surface of one end plate 3 corresponding to the convex spherical surface 16a of the bridge body 16. Then, the piece body 16 fitted to each bolt 6 is fitted to each concave spherical surface 17.
The convex spherical surface 16a is fitted slidably.

Each bolt 6 has a bolt insertion hole 8 in one end plate 3 and bolt insertion holes 15a to 15a in the rubber packings 10 to 12.
15c and the bolt insertion hole 9 of the other end plate 4,
A nut 7 is screwed into the male screw portion 6b.

The nut 7 has a convex spherical surface (hemispherical surface) 7a as shown in FIG. 5 and a circular shape having a linear portion 7b as a part in plan view as shown in FIG. . On the surface of the other end plate 4 corresponding to the convex spherical surface 7a of the nut 7, a concave spherical surface (hemispherical surface) 18 is provided concentrically with each bolt insertion hole 9. The convex spherical surface 7a of each nut 7 is slidably fitted into each concave spherical surface 18.
The rotation stopping of each nut 7 is stopped by the rotation stop pin 19 driven into the other end plate 4 abutting on the linear portion 7b.

The bolt 6 has a head portion 6a and a piece body 1.
A washer 20 is fitted in between 6 and 6.

Next, an operation procedure when the opening 2 is sealed by the sealing device 1 according to this embodiment having the above-mentioned structure will be described. First, the seal member 5 is arranged between the both end plates 3 and 4, the nuts 7 are fitted in the concave spherical surfaces 18 of the other end plate 4, and the nuts 7 are prevented from rotating by the rotation stop pins 19. Then, the bolt 6 in which the piece body 16 is fitted
Is inserted into the bolt insertion holes 8, 15a to 15c, 9 from one end plate 3 side toward the other end plate 4 side, and the male screw portion 6b of each bolt 6 is temporarily fixed to each nut 7. Lightly screw on.

The entire sealing device 1 thus constructed is fitted into the opening 2 to be sealed. Then, by tightening the bolts 6 and the nuts 7 in order, both end plates 3, 4
Are pressed toward each other. As a result, the seal member 5 is pressed through the both end plates 3 and 4, the outer diameter of the seal member 5 is enlarged, the outer peripheral surface of the seal member 5 is brought into close contact with the inner peripheral surface of the opening 2, and the opening 2 is sealed liquid-tight. . In this case, the bolts 6 and nuts 7 can be tightened quickly so that each bolt 6
And the tightening amount of the nut 7 becomes uneven and both end plates 3,
Even when 4 is in a non-parallel state, the bolt 6 is loosely fitted in the bolt insertion holes 8 and 9 formed in the both end plates 3 and 4, and the head 6a of the bolt 6 and one end plate 3 are convex. Through the spherical spherical surface 16a and the concave spherical surface 17 so as to slidably contact each other,
Since the other end plate 4 and the other end plate 4 are in slidable contact with each other through the convex spherical surface 7a and the concave spherical surface 18, the bolt 6 and the nut 7 with respect to the both end plates 3 and 4 of FIG. As shown by the chain double-dashed line, it tilts freely within the range of the spherical surface. This allows
Even if you fasten the bolt 6 and the nut 7,
Interference does not occur at the fastening portion between the bolt 6 and the nut 7, and the work can be performed quickly.

In the above embodiment, the sealing member 5 is formed by laminating the three rubber packings 10 to 12, but the number of rubber packings is not limited to three, and may be changed as necessary. Therefore, the number of layers is set. Further, although the bolt 6 and the piece body 16 are separate bodies, they may have an integral structure. Further, the bolt 6 side and the nut 7 side are each a convex spherical surface, and the one end plate 3 side and the other end plate 4 side are a concave spherical surface. However, the present invention is not limited to this, and the bolt 6 side and the nut 7 side. The sides may be concave spherical surfaces, and the one end plate 3 side and the other end plate 4 side may be convex spherical surfaces.
Furthermore, it goes without saying that other configurations can be appropriately changed without departing from the scope of the present invention.

[0022]

As described above in detail, according to the sealing device of the present invention, the bolt is loosely fitted in the bolt insertion hole formed in both end plates, and the head of the bolt and one end plate are spherical. Since the nut and the other end plate are in slidable contact with each other through the spherical surface, the bolt and nut can freely tilt within the range of the spherical surface with respect to both end plates. To do. Therefore, if the bolts and nuts are tightened quickly so that the bolts and nuts are not evenly tightened and the both end plates are in a non-parallel state, the bolts and nuts must be spherical within the range of both end plates. To tilt freely,
There is no interference phenomenon at the fastening portion between the bolt and the nut, and the work can be performed quickly.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view showing a configuration of a sealing device according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1;

FIG. 3 is a view taken in the direction of arrow B in FIG. 1;

FIG. 4 is an enlarged view of a C circle portion in FIG.

FIG. 5 is an enlarged view of a D circle portion of FIG.

FIG. 6 is a view on arrow E of FIG.

[Explanation of symbols]

 1 Sealing Device 2 Opening 3 One End Plate 4 The Other End Plate 5 Sealing Member 6 Bolt 6a Bolt Head 6b Male Thread Part of Bolt 7 Nut 7a Convex Spherical Surface 8 Bolt Insertion Hole of One End Plate 9 Bolt insertion hole on the other end plate 10 Rubber packing on one side 11 Rubber packing on the middle part 12 Rubber packing on the other side 13 Elastomer 14 Elastomer 15a Bolt insertion hole on one side rubber packing 15b Rubber packing on the middle part Bolt insertion hole 15c Bolt insertion hole for rubber packing on the other side 16 Piece 16a Piece convex spherical surface (spherical surface) 17 Concave spherical surface (spherical surface) 18 of one end plate Concave spherical surface (spherical surface) of the other end plate 19 Non-rotating pin 20 Washer

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Akira Sawaguchi 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Yuzo Kuriyama 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo No. 8 Nippon Telegraph and Telephone Corporation (72) Inventor Hiroshi Watanabe 6-12 Ueno 6-12, Iwatsuki City, Saitama Prefecture Fujikura Gomb Industry Co., Ltd.

Claims (2)

[Claims] 1. A seal member made of an elastic material is interposed between two mutually parallel end plates fitted into an opening to be sealed, and a plurality of bolts and nuts are tightened to interpose the both end plates. In the sealing device that presses the sealing member by pressing the sealing member, the outer peripheral edge portion of the sealing member is brought into close contact with the inner peripheral surface of the opening portion to seal the opening portion, and the bolt is drilled in the both end plates. It is loosely fitted in the bolt insertion hole, the head of the bolt and the one end plate are brought into slidable contact with each other via a spherical surface, and the nut and the other end plate are slid with each other via a spherical surface. Sealing device characterized by being freely contacted. 2. The bolt has a piece having a convex spherical surface fitted to the head side, and the one end plate has a concave spherical surface into which the convex spherical surface is slidably fitted. The nut is provided with a convex spherical surface on one side surface, and the other end plate is
The sealing device according to claim 1, wherein a concave spherical surface into which the convex spherical surface of the nut is slidably fitted is provided.