JPS5844916B2 - Socket connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to pipe fittings and, more particularly, to socket assemblies for pipe fittings.

Socket assemblies are conventionally comprised of a socket having an end cap portion for retaining a sealing member.

These are shown, for example, in British Patent No. 1,143,669, British Patent No. 1,270,526 and French Patent No. 1,472,035.

However, according to these conventional socket assemblies,
When fixing the end cap to the end of the socket, for example British Patent No. 1143669 and French Patent No. 14
As shown in Japanese Patent No. 72035, the end cap is attached to the socket so as to surround the outer surface of the end of the socket.

Furthermore, there is also a close contact between the tip of the rim of the socket and the inner surface of the end cap facing it, or as shown in, for example, British Patent No. 1,270,526 and French Patent No. 1,472,035. Is it there? The structure is filled with a portion of the sealing member to limit deformation of the end cap.

Therefore, these socket assemblies may be damaged if they are dropped from a height and their end cap portion collides with a hard surface, or if the end cap portion is damaged in any way. A disadvantage is that, in the event of a blow from an object, for example, the socket assembly will be subjected to an impact load which will result in the failure of at least the end cap portion thereof.

It is an object of the present invention to eliminate such drawbacks and to reduce the chances of failure of the socket assembly as described above due to impact loads.

In accordance with the present invention, a socket assembly is provided in which the end cap portions are capable of deflecting inwardly to absorb impact loads on the socket assembly.

That is, the socket assembly according to the invention has a wedge shape between the outer side 2a of the tapered socket end and the inner surface of the end cap to aid in the interference fit of the end cap portion on the socket. An annular gap 2b is provided between the parts.
Furthermore, there is also an annular gap 23 between the rim 16 of the mouth of the socket and the base 15 of the end cap facing it.
By adopting the structure provided with this, even when receiving an impact load, for example, the end cap portion can be bent inward to absorb the load.

The present invention includes a socket, an end cap having an annular groove and an interference fit over the outer portion of the socket;
a sealing member, the sealing member having a locking portion that hangs in an annular space between the annular groove-shaped portion of the end cap and the counterbore of the end of the socket, and is coupled with a sealing head for sealing between the socket and a spigot inserted into the socket during use, and the outer side of the end of the socket has a sealing head for sealing between the socket and a spigot inserted into the socket, and the outer part of the end of the socket has a sealing head for sealing between the socket and a spigot inserted into the socket. A taper is provided to aid in an interference fit of the end cap, thereby connecting the tapered outer portion of the socket end and the substantially cylindrical inner surface of the end cap facing thereto. When the end cap is subjected to a radially inward force, the end cap portion adjacent to the tapered outer portion of the socket is deflected in the direction of the outer portion to absorb the force. An annular gap of the wedge-shaped portion is formed to absorb the force, and also the rim of the mouth of the socket and the base of the annular groove of the end cap facing it are axially arranged to absorb the force. The present invention provides a spigot receiving socket assembly that is spaced apart in the direction.

In order to provide a thorough understanding of the present invention, an embodiment of the present invention will now be described with reference to the accompanying drawings.

The accompanying drawings show a socket assembly 1 comprising a socket 2 having internal cross-sectional dimensions suitable for receiving a spigot (not shown).

The permissible insertion degree of the spigot into the socket is limited by an abutment 3 which is formed integrally with the socket 2.

The outer end of the socket 2, ie the mouth 4, has a large diameter compared to the rest of the socket and has a counterbore 5 formed therein.

An annular sealing member 7 is arranged within the counterbore 5 .

The sealing member 7 has a sealing head 8 .

The sealing head 8 is generally frustoconical when undeformed and includes inner ribs 9 and outer ribs 10 for sealing contact with the spigot and socket, respectively, when the spigot is inserted into the socket. It is equipped with

The flange 6 of the sealing member 7 is retained within the counterbore 5 by an end cap 11.

The end cap 11 is shown as being a resilient tight fit on the outer side of the socket, and the socket and end cap are each formed with a cooperating annular projection 12.13.

Protrusions 12, 13 such that acceptance of the end cap 11 onto the socket 2 is easier than removal from the socket.
It will be noted that the outer portion 2a of the outer end of the socket formed therein and adjacent the counterbore 5 is tapered to aid in the tight fit of the end cap 11 onto the socket.

The illustrated socket 2 and end cap 11 are formed from a plastic material having sufficient resiliency to permit a tight fit of the end cap onto the socket.

It will also be appreciated that the socket 2 and end cap may be molded without the need for complex molds and cores.

End cap 11 has an annular groove 14 .

The base 15 of the annular groove 14 is connected to the rim 1 of the mouth of the socket.
6 and adjacent the end 17 of the flange 6.

The flange 6 is arranged at substantially the same height as the rim 16.

In FIG. 2, the axial gap between base 15 and rim 16 is shown enlarged.

Although this gap is practically imperceptible, it is sufficient to ensure that the flange 6 receives an axial compressive force between the base 15 and the radial end wall 18 of the counterbore 5. It's a big size.

The flange 6 is also connected to the inner arm 2 of the annular groove 14.
0 and the circumferentially facing surfaces of the counterbore 5 are advantageously subjected to radial compressive forces.

The outer arm 19 of the groove 14 extends adjacent the outer surface of the end socket, and the inner arm 20 of the groove 14 engages the inner surface of the flange 6 and has a portion 21 of the sealing member inside the socket. It extends adjacently.

Portion 21 interconnects flange 6 and sealing head 8.

The radially inner portion of the end surface of arm 20 engages the sealing member, and as shown in FIG. It will be noted that an axial gap is provided.

In this way, the flange 6 is retained in the counterbore 5 of the socket mouth 4 by the end cap 11, but with an annular gap extending substantially axially between the inner arm 20 and the socket 2. It will be appreciated that 22 is sized to prevent flange 6 from being pulled through this gap.

As can be clearly seen in FIG.

The gap 2b, which is wedge-shaped and extends over the axial length of the flange 6, allows the end cap 11 adjacent to the tapered outer part 2a of the socket end to absorb radially inward forces, e.g. It will be appreciated that the end cap will deflect in the direction indicated by any of the arrows F in FIG. 2 when subjected to a force in that direction.

With this configuration, the end cap 11 can absorb lateral impact forces, that is, impact loads.

The deflection of the end cap 11 is aided by providing an additional annular gap 2c between the projections 12 and 13.

This gap 2c allows movement between the projections 12 and 13 when such deflection occurs.

When the spigot is inserted into the socket, the sealing head extending into the mouth of the socket is deformed into and towards the tubular part, so that the socket can be traversed to the extent that it is recognized. It will be appreciated that spigots manufactured within surface dimensional tolerances can be accommodated without loss of sealing efficiency.

The illustrated sealing head 8 has four axially spaced inner ribs 9, all of which are sloped in the direction in which the spigot is inserted into the socket and in the direction facing each other. Note also that the spigot has two outer ribs 10 which engage the outer end 4 of the socket when it is inserted into the socket.

The inner arm 20 of the end cap 11 extends radially and inwardly against the inner surface of the outer end 4 of the socket without impeding the reception of the spigot into the socket, as shown in FIG. can be extended.

The radial thickness of the flange 6 is therefore configured to be substantially the same as the thickness of the counterbore 5 so that for a given radial flange thickness, the radial extent of the counterbore and outer socket portion is can be kept to a minimum.

To aid in the reception of the flange 6 into the interior of the counterbore 5, the radial end wall 18 of the counterbore 5 is undercut and the flange 6 is shaped to engage the undercut. I can do it.

To aid in the reception of the flange 6 into the counterbore 5,
Glue can be used.

For example, before fitting the end cap 11 into the socket,
The flange 6 can be glued to the end cap 11.

It is also conceivable for the flange 6 of the sealing element 7 to be configured with a radially outwardly extending lip 23, which is shown in dotted lines in FIG.

Lip 23 connects rim 16 of socket 2 and end cap 11
and the base 15 of and is compressed therebetween.

The provision of the lip 23 improves the reception of the sealing member 7 into the socket assembly, and the provision of the lip 23 improves the reception of the sealing member 7 into the socket assembly, and prior to interference fitting of the end cap 11 into the socket 2, the provision of the lip 23 improves the reception of the sealing member 7 into the socket assembly. When placing the flange 6 of the sealing member 7 into the counterbore 5 of the socket, the assembly is aided by ensuring the positioning of the sealing member 7.

To aid in the tight fit of the end cap, the flange 6
2 to prevent the inner arm 20 of the end cap from striking the tip of the flange 6 when the end cap is tightly fitted into the socket. can do.

Embodiments of the present invention are listed below.

(1) comprising a socket, an end cap tightly fitted onto the outer side of the socket, and a sealing member for sealing between the socket and a spigot inserted into the socket during use; The sealing member is held between the end cap and the socket, and the outer end of the socket is tapered to aid in a tight fit of the end cap onto the socket. forming with said end cap an annular gap of a wedge-shaped portion between the tapered outer portion of the end of said socket and said end cap, said annular gap being such that said end cap extends radially inwardly; A spigot-receiving socket assembly characterized in that the end cap portion adjacent the tapered outer portion of the socket is deflected inwardly when subjected to a directed force.

2. The socket assembly of claim 1, wherein cooperating projections on the socket and end cap tighten the end cap onto the outer side of the socket.

(3) the protrusion is annular and an annular gap is formed between the protrusion of the socket and the protrusion of the end cap such that the end cap flexes toward the tapered outer portion of the socket; The socket assembly according to item (2) above, wherein movement between the protrusions is allowed between the protrusions.

(4) a flange portion of the sealing member retained within the socket between circumferentially opposing surfaces of the socket and the end cap; The socket assembly according to any one of the above items, characterized in that the socket assembly is housed.

(5) The flange portion is subjected to a radial compressive force between circumferentially opposing surfaces, as described in (4) above.
Socket assembly as described in Section.

(6) The socket assembly according to item (4) or item (5) above, wherein the flange portion is disposed inside a counterbore formed at the end of the socket.

7. The socket assembly of claim 6, wherein the flange portion is subjected to an axial compressive force between radially opposed surfaces of the counterbore and the end cap.

(8) the end cap comprises an annular groove-shaped portion, the outer arm of the annular groove-shaped portion extending adjacent the outer surface of the end of the socket, and the base of the annular groove-shaped portion extending from the rim of the mouth of the socket; and wherein the inner arm of the annular groove-shaped portion extends into the interior of the socket;
The socket assembly according to any one of items (4) to 7) above.

(9) The socket assembly of item (8), wherein the end of the flange portion is disposed at substantially the same height as the rim.

(10) The flange portion of the sealing member includes a radially outwardly extending lip disposed between the rim of the socket and the base of the end cap. socket assembly.

αυ characterized in that said wedge-shaped annular gap extends over substantially the axial length of said flange portion;
The socket assembly according to any one of items (4) to IO).

0 - A socket assembly substantially as herein described and illustrated in the accompanying drawings.

[Brief explanation of the drawing]

FIG. 1 is a partial axial cross-sectional view of the socket assembly of the present invention, and FIG. 2 is a detailed view of FIG. 1 on a larger scale. DESCRIPTION OF SYMBOLS 1... Socket assembly, 2... Socket, 3... Contact part, 4... Mouth part of socket, 5...... Counterbore, 6...Flange, 7...Sealing member, 8...Sealing head,
9...Inner rib, 10...Outer rib,
11... End cap, 12.13...
- Annular protrusion, 2a... Outer part of the outer end of the socket, 14... Annular groove-shaped part of the end cap, 15... Base, 16... ...Rim, 17
... End of flange 6, 18 ... Radial end wall of counterbore, 19 ... Outer arm, 2
0... Inner arm, 21... Part of the sealing member, 22... Annular gap, 2b...
- Annular gap, 2c... Annular gap.

Claims (1)

[Claims] 1 a socket 2 and an end cap 11 having an annular groove 14 and tightly fitted onto the outer side of said socket;
and a sealing member 7, said sealing member 7 comprising a locking portion 6 that is locked in an annular space between the annular groove of the end cap and the counterbore 5 of the end of the socket. , a sealing head 8 is coupled to the locking part 6 for sealing between the socket and a spigot inserted into the socket during use, and a sealing head 8 is coupled to the outer part 2 of the end of the socket 2.
a is provided with a taper to aid in the interference fit of the end cap 11 onto the socket, thereby facing the outer part 2a of the tapered socket end. When the end cap is subjected to a radially inwardly directed force F, the substantially cylindrical inner side of the end cap 11 has a substantially cylindrical inner surface adjacent to the tapered outer side 2a of the socket. An annular gap 2b of the wedge-shaped part is formed for deflecting the end cap part in the direction of said outer part to absorb said force F, and also for connecting said socket mouth rim 16 and said facing said A spigot receiving socket assembly characterized in that the base 15 of the annular groove 14 of the end cap is axially spaced to absorb said force F.