JP2598620Y2 - Housing type fitting - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing type pipe joint for integrally connecting ends of two pipes whose ends are concentrically butted against each other.

[0002]

2. Description of the Related Art FIGS. 12 and 13 show an example of this type of housing type pipe joint. this is,
End 1a. A ring-shaped gasket 2 is externally fitted between the ends 1a, 1a of both pipes 1, 1 in which the pipes 1a are butted concentrically with each other, and between the ends 1a, 1a of both pipes 1, 1 via the gasket 2. A pair of substantially semi-circular housings 3 and 3 are covered, and opposite ends 3 of the two housings 3 and 3.
The pipes 1 and 1 are integrally connected by connecting the pipes a and 3a with each other by a connecting tool 4 including a bolt 4a and a nut 4b.

[0003]

In the above conventional housing type pipe joint, the two housings 3, 3 are brought closer to each other by tightening the bolts 4a or the nuts 4b.
Presses the gasket 2, which causes the gasket 2
Of the pipes 1 and 1 end 1a. 1a, the housings 3, 3 are pressed against the gasket 2 evenly.
Are strongly pressed against the outer peripheral surface of the gasket 2 so that a part 2a of the outer peripheral surface of the gasket 2 is located between the end portions 3a of the housings 3, 3 as shown in FIG. As a result, the gasket 2 is not tightly attached to the pipes 1 and 1, resulting in uneven contact between the pipes 1 and 1.
1 flows through its ends 1a. There was a risk of leaking to the outside from between 1a.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a housing-type pipe joint in which a gasket is prevented from being caught between ends of both housings when connecting pipes. I have.

[0005]

In order to achieve the above-mentioned object, according to the present invention, a ring-shaped gasket is externally fitted between ends of both pipes whose ends are concentrically butted against each other. A pair of substantially semi-circular housings are covered between the ends of the two pipes through, and the opposite ends of the two housings are connected to each other by a connecting tool composed of a bolt and a nut, thereby connecting the two pipes. In a housing type pipe joint which is integrally connected, a positioning piece inserted between ends of the two housings, and a positioning piece integrally formed at one end of the positioning piece and arranged along inner peripheral surfaces of both housings. A pair of gasket protection members having a gasket biting prevention piece for preventing the gasket from being bitten between the ends of the two housings. To have.

According to a second aspect of the present invention, a support piece is integrally provided at the other end of each of the positioning pieces, and a bolt fitting hole for fitting into a bolt of the connecting tool is formed through the support piece. It is characterized by:

[0007]

According to the first aspect of the present invention, when connecting the pipes, a gasket is fitted between the ends of the two pipes whose ends are concentrically abutted, and a pair of housings are put on the gaskets. By inserting the positioning piece of the protection member between the ends of both housings, the gasket biting prevention piece of each gasket protection member is disposed along the inner peripheral surface of both housings, and then the end portions of the two housings are formed. What is necessary is just to connect together by the connection tool which consists of a bolt and a nut. In this case, since both end corners of the inner peripheral surfaces of the two housings hit the gasket biting preventing pieces and do not hit the outer peripheral surface of the gasket, a part of the outer peripheral surface of the gasket is bitten between the ends of the two housings as in the related art. The inner peripheral surface of the gasket is evenly adhered to the outer peripheral surface of the pipe, and there is no fear that the fluid flowing in both pipes leaks out from between the ends.

According to the second aspect of the present invention, since the bolt fitting hole is formed in the support piece integrally extended with each of the positioning pieces, the bolt and the nut are screwed together to connect the two housings. In this case, the bolts are fitted into the bolt fitting holes, so that the bolts are not dropped unexpectedly, and the connection work of both pipes can be performed quickly and easily.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a first embodiment of the present invention, in which a positioning piece 8a inserted between the ends 3a of the housings 3 and 3 is integrated with one end of the positioning piece 8a. It is formed and arranged along the inner peripheral surface of both housings 3,3, so that the end portions 3a, 3 of both housings 3,3 are formed.
arc-shaped gasket biting prevention piece 8 that closes gap α between
b) a pair of synthetic resin gasket protection members 8,
8 are provided, and concave portions 7 are formed at both ends of the inner peripheral surfaces of the housings 3, 3, and the gasket is formed in the concave portions 7, 7 opposed to each other with a gap α between the housings 3, 3. The biting prevention piece 8b is fitted. Structures other than those described above are substantially the same as those of the housing type pipe joint shown in FIGS. 12 and 13, and therefore, the same portions are denoted by the same reference numerals and description thereof will be omitted.

In the above configuration, when the two pipes 1 and 1 are connected to each other, the end portions 1a. 1a concentrically butted end portions 1a. The gasket 2 is externally fitted between 1a, the gasket 2 is covered with a pair of housings 3,3, and the positioning piece 8a of each gasket protection member 8,8 is inserted between the end portions 3a, 3a of both housings 3,3. . As a result, as described later, when the two housings 3 are connected, the gasket biting prevention piece 8b is automatically positioned and fitted into the recesses 7,7. Then, the ends 3a, 3a of the housings 3, 3 are bolted to each other by bolts 4.
a and a nut 4b. In this case, the corners 5, 5 at both ends of the inner peripheral surface of the housings 3, 3 hit the gasket biting prevention piece 8 and do not come into contact with the outer peripheral surface of the gasket 2, so that a part of the outer peripheral surface of the gasket 2, Ends 3 of both housings 3,3
a, 3a, the inner peripheral surface of the gasket 2 is evenly adhered to the outer peripheral surfaces of the pipes 1, 1 so that the fluid flowing through both the pipes 1, 1 has its ends 1a. There is no danger of leakage to the outside from between 1a.

In the above embodiment, the gasket biting prevention piece 8b is fitted into the recesses 7, 7, but as shown in FIG. 4, the recesses 7, 7 may be omitted.
The compression ratio of the gasket 2 can be increased, and the existing housings 3, 3 can be used as they are (second embodiment).

FIGS. 5 to 7 show a third embodiment of the present invention, in which a support piece 8 is provided at the other end of each positioning piece 8a.
c is integrally extended, and a bolt fitting hole 11 that fits into the bolt 4a of the connecting tool 4 is formed through the support piece 8c.
Since the configuration other than the above is substantially the same as that of the first embodiment shown in FIGS. 1 and 2, the same parts are denoted by the same reference numerals and description thereof will be omitted. In this embodiment, as shown in FIG. 7, a plurality of protrusions 11a protruding from the periphery of the bolt fitting hole 11 are brought into contact with the outer peripheral surface of the bolt 4a. May be omitted, and the entire circular peripheral portion of the bolt fitting hole 11 may be brought into contact with the outer peripheral surface of the bolt 4a. In short, the bolt 4a fitted into the bolt fitting hole 11 does not fall out unexpectedly. It should just be like that.

According to the above configuration, when the bolts 4a and the nuts 4b are screwed into each other to connect the two housings 3, 3, the bolts 4a are fitted into the bolt fitting holes 11 so that the bolts 4a are formed. Can be prevented from dropping unexpectedly, and the work of connecting the two pipes 1 and 1 can be performed quickly and easily.

In the third embodiment, the gasket biting prevention piece 8b is fitted into the recesses 7, 7, but the recesses 7, 7 may be omitted as shown in FIG. If this is the case, the compression ratio of the gasket 2 can be increased, and the existing housings 3, 3 can be used as they are (fourth embodiment).

In the above embodiments, the gasket protection member 8
Is formed of a synthetic resin material, but it may be formed by bending a metal plate such as a steel plate as shown in FIG.
Example).

As shown in FIGS. 10 and 11, side walls 8d and 8d are formed on both side edges of the gasket biting prevention piece 8b.
d may be integrally formed (sixth embodiment). According to this, not only the outer peripheral surface of the gasket 2 but also both side surfaces thereof are not caught between the ends 3a, 3a of the housings 3, 3.

[0017]

According to the first aspect of the present invention, the inner peripheral surfaces of the two housings are connected to each other when the ends of the two housings, which are covered with the gasket between the ends of the two pipes, are connected by bolts and nuts. Since the corners at both ends hit the gasket biting prevention piece and do not hit the outer peripheral surface of the gasket, a part of the outer peripheral surface of the gasket does not bite between the ends of both housings as in the conventional case, and the inner peripheral portion of the gasket does not. The surfaces are evenly adhered to the outer peripheral surface of the pipe, and there is no fear that the fluid flowing in both pipes leaks out from between the ends.

According to the second aspect of the present invention, since the bolt fitting hole is formed through the support piece integrally extended with each of the positioning pieces, the bolt and the nut are screwed together to connect the two housings. In this case, the bolts are fitted into the bolt fitting holes, so that the bolts are not dropped unexpectedly, and the connection work of both pipes can be performed quickly and easily.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a housing type pipe joint according to a first embodiment of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is a perspective view of the gasket protection member.

FIG. 4 is a cross-sectional view of a housing type pipe joint according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a housing type pipe joint according to a third embodiment of the present invention.

FIG. 6 is a view taken in the direction of arrows BB in FIG. 5;

FIG. 7 is a perspective view of the gasket protection member.

FIG. 8 is a cross-sectional view of a housing type pipe joint according to a fourth embodiment of the present invention.

FIG. 9 is a cross-sectional view of a gasket protection member according to a fifth embodiment of the present invention.

FIG. 10 is a horizontal sectional view of a housing type pipe joint showing a sixth embodiment of the present invention.

FIG. 11 is a perspective view of the gasket protection member.

FIG. 12 is a cross-sectional view showing a conventional example.

FIG. 13 is a view as viewed in the direction of arrows CC in FIG. 12;

[Explanation of symbols]

 Reference Signs List 1 pipe 1a end of pipe 1 2 gasket 3 housing 3a end of housing 3 4 coupling tool 4a bolt 4b nut 8 gasket protection member 8a positioning piece 8b gasket biting prevention piece 8c support piece 11 bolt fitting hole

Claims (2)

(57) [Scope of request for utility model registration] 1. A ring-shaped gasket is externally fitted between ends of two pipes whose ends are concentrically butted against each other, and a pair of substantially semicircular housings are provided between the ends of the two pipes via the gaskets. In a housing-type pipe joint, the two pipes are integrally connected by connecting the opposite ends of the two housings with a connector consisting of a bolt and a nut. A positioning piece inserted between the parts, and formed integrally with one end of the positioning piece and arranged along the inner peripheral surfaces of both housings to prevent the gasket from being caught between the ends of both housings A housing type pipe joint, comprising: a pair of gasket protection members having a gasket biting prevention piece. 2. The positioning piece according to claim 1, wherein a support piece is integrally provided at the other end of the positioning piece, and a bolt fitting hole for fitting into a bolt of the connecting tool is formed through the support piece. Item 1
The described housing type pipe joint.