JPH0459510B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a joint for a main pipe for water supply and drainage.

(Prior art) Conventionally, in order to connect cast iron pipes for water supply mains, the socket side of the pipe is made wide in diameter, a flange with bolt holes is provided at the end, and a rubber ring is attached to the inside of the flange. , insert the end of the connecting pipe, and tighten the press ring and flange fitted to the end of the connecting pipe with bolts to make sure the rubber ring is tightly attached to the inner periphery of the socket and the outer periphery of the insertion part of the connecting pipe to prevent water leakage. Was.

In addition, when connecting short pipes or bent pipes, a special push ring may be used as the push ring. In that case, the push ring and the flange of the socket are tightened with bolts, and at the same time the push ring is attached to the outer periphery of the insertion side of the connecting pipe. Tightening with screws was also practiced.

(Problem to be solved by the invention) Since water supply mains are generally buried underground, the conventional connection method has the tendency to loosen at the connection parts due to vibrations and shocks caused by earthquakes, trucks, and various other causes over the years. It was easy to cause water leakage.

In addition, when using a special press ring, the screws tightened around the outer periphery of the insertion side of the connecting pipe tend to loosen, and in order to tighten the press ring around the outer periphery of the insertion side, the screws tightened on the outer periphery of the insertion side tend to have to be tightened considerably below the connecting part. Since a large working hole must be dug, if the pipe diameter is large, construction is very labor-intensive and reduces work efficiency.

Therefore, the present invention is an attempt to eliminate such problems with the conventional method, and is designed to prevent leakage of water even if it has been buried underground for many years and is subject to vibrations and shocks, and also to prevent piping connections. The work is easy and can be carried out reliably without requiring special skill.

(Means for Solving the Problems) In order to solve the above problems, the present invention consists of a press ring, a cover, a support metal, and a clamp, and the press ring has a rubber ring facing the flange of the socket. The cover covers the entire flange and press ring, one hem engages the outer periphery of the receptacle, the other hem holds the outer periphery of the insertion part, and the cover A screw hole is provided on the circumferential side of the press ring side, and the entire cover is divided in half, with several claws protruding from the hem of one cover on the screw hole side, and a screw hole is provided on the hem of the other cover on the screw hole side. is formed into a semi-circular arc and is connected with a catch that holds the outer periphery of the insertion part, and the support plate has locking pieces at both ends of the semi-circular part that faces the catch and can hold the insertion part. A claw hooking edge that can be engaged with the claw is provided on one side of the semicircular arc portion, and the fastener is formed to fit around the outer periphery of the catch;
One end thereof is provided with a hook piece that can be engaged with one of the locking pieces of the support metal, and the other end is provided with a bolt attachment piece that faces and can be tightened together with the other locking piece of the support metal.

(Example) Next, embodiments of the present invention will be explained in detail with reference to the drawings.

Reference numeral 1 denotes a water supply main pipe, the socket part 2 of which has a wide diameter in the shape of a trumpet, and a flange 3 is provided at the end thereof. Reference numeral 4 denotes a rubber ring fitted to the inner periphery of the flange 3, and an annular groove 5 is provided on the outer side of the rubber ring.
Reference numeral 6 denotes a press ring that faces the end face of the flange 3 and presses the rubber ring 4, and on one side thereof is provided with an annular protrusion 7 that fits into the groove 5. Reference numeral 8 denotes a connecting water supply main pipe, and its insertion portion 10 is passed through the press ring 6 and rubber ring 4 and inserted into the socket portion 2.

Reference numerals 10 and 11 denote a pair of covers formed to cover the entire outer sides of the opposing flange 3 and press ring 6, and which are split in half.
One of the hem portions 12 and 13 is bent to engage the outer periphery of the socket 2, and the other hem portion 14 and 15 is bent to hold the outer periphery of the insertion portion 9. 16,17
2 are inspection windows provided on each cover 10, 11, and 18, 19 indicate several screw holes provided on the press ring 6 side of each cover 10, 11. Three protruding claws are provided at the tip of the hem 12 of one cover 10 so as to be located between the respective screw holes, and the other cover 11 has an insertion portion inserted through the hem 13. 9. A catch seat 21 for holding the outer periphery is provided in series.

22 is a cover 12 so that when the two halves of the covers 10 and 11 are combined, they can be combined into one body.
23 is a connecting edge formed at one end of the cover 1.
1, and when one end of the cover 10 is fitted into the coupling edge 23, the protruding piece 24 provided at the other end of the cover 10 can be fitted into the recess 23. There is. Reference numeral 25 denotes a connecting plate for connecting the concave portion 23 side and the projecting piece 24 side of the cover, one of which is loosely attached to a shaft 26 installed in the cover 10, and the other is provided with a hook groove 27 to connect the cover 11. It is designed so that it can be fixed to a shaft 28 implanted in the.

Reference numeral 29 is a support metal that holds the outer periphery of the insertion portion 9 facing the receiving seat 21, and has locking pieces 31 and 32 connected to both ends of the semicircular arc portion 30, and one part of the semicircular arc portion 30. A claw hooking edge 33 that engages with each of the claws 20 on the side
has been formed.

Reference numeral 34 denotes a clamp formed in an arc shape so as to fit on the outside of the catch seat 21, and has a hook piece 35 on one end thereof which can be engaged with the locking piece 31, and a hook piece 35 on the other end. Forms an engaging piece 36 facing the locking piece 32 of the support metal, inserts a bolt 39 through the bolt hole 37 of the engaging piece and the locking groove 38 of the locking piece 32, and tightens it with a nut 40. It's configured so that you can get it.

To use the joint configured as described above, fit the rubber ring 4 to the inner periphery of the flange 3 of the socket, fit the press ring 6 into the insertion part 9 of the connecting pipe, and then insert the insertion part 9 into the rubber ring 4. and insert it into the socket 2. Next, attach the cover 11 so as to cover the adjacent flange 3 and push ring 6, and attach it together with the cover 10. By screwing the screws 41 into the screw holes 18 and 19, respectively, the rubber ring 4 is attached to the push ring 6. Press to bring the rubber ring 4 into close contact with the inner periphery of the flange 3 and the outer periphery of the insertion portion 9. Next, the support metal 29 is attached to the outer periphery of the insertion part 9 facing the catch seat 21, while the hook hooking edge 33 is locked to the claw 20, and the clamping metal 34 is overlapped on the outside of the catch seat 21 to tighten the hook piece. 35 is hung on the locking piece 31, and the bolt 39 is passed through the bolt hole 37 and the locking groove 38 and tightened with a nut 40.

(Effects of the Invention) In the present invention as configured above, the cover covers the entire press ring of the flange, one hem portion thereof engages with the outer periphery of the socket portion, and the other hem portion engages with the outer periphery of the insertion portion. A screw hole is provided on the periphery of the push ring side of the cover, so by tightening several screws, the push ring presses against the rubber ring. It fits well to the outer periphery of the water supply pipe, making it possible to connect watertightly, as well as safely holding the connecting portion of both water supply mains.

In addition, the entire cover is divided in half, and a semicircular arc-shaped catch that holds the outer periphery of the insertion part is connected to the hem of one of the covers on the screw hole side, and the support plate faces the catch. A locking piece is provided protrudingly at both ends of the semi-circular arc-shaped part capable of holding the insertion part, and a locking piece is provided on one side of the semi-circular arc-shaped part.
The screw hole side of the other cover has a protruding hook edge that can be engaged with a protruding pawl, and the fastener is formed to fit the outer periphery of the catch, and the above-mentioned support is attached to one end of the clamp. A hook piece that can be attached to one of the metal locking pieces is provided, and a bolt mounting piece that faces and can be tightened together with the other locking piece of the support metal is provided at the other end, so that the catch can be attached to the hem. Since it is integrated with one cover through the support metal and clamping metal and clamps and fixes the outer periphery of the insertion part, the connecting part of the water supply and drainage main can be protected from earthquakes, trucks, etc.
Since it can be protected for many years from vibrations and shocks caused by various other causes, water leakage can be effectively prevented.

Furthermore, since each member is easy to attach, no special skills are required for piping connection work, so even non-skilled workers can perform the work reliably. Therefore, you will not be able to attach the hook rim and clamp unless you firmly tighten each screw to the specified position, so you will never forget to tighten the screws, and once you have installed the hook rim and clamp, you will not be able to install the hook rim and clamp. The side surface of the screw prevents the screw from loosening.

Further, when the joint according to the present invention is used, there is no need to provide bolt holes in the flange of the socket, so there is an advantage that processing time can be omitted and the strength of the flange portion can be increased.

In the above example, we talked about water supply mains, which are currently recognized as having the highest utility value, but in the future, they will be recognized as effective as joints for drainage mains and rainwater pipes.

Furthermore, although most of the current water supply main pipes are cast iron pipes, the present invention can be similarly applied to hume pipes and plastic water supply and drainage pipes.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view of a connected state, Fig. 2 is a perspective view of each member separated, and Fig. 3 is a state with some of the members attached. FIG. 4 shows a sectional view of the connected state. 2... Socket part, 3... Flange, 4... Rubber ring, 6... Push ring, 9... Insertion part, 10, 11...
Cover, 12, 13, 14, 15...Hem part, 1
8, 19... Screw hole, 20... Claw, 21... Seat, 22... Joining edge, 25... Connecting plate, 29...
Support metal, 30... Semi-circular arc portion, 31, 32... Locking piece, 33... Claw hook edge, 34... Clamping metal, 35...
...Hook piece, 36...Engagement piece, 39...Bolt.

Claims (1)

[Claims] 1 Consists of a push ring, cover, support metal and clamping metal,
The push ring faces the flange of the socket so that it can press the rubber ring, and the cover covers the entire flange and push ring, one hem engages with the outer periphery of the socket, and the cover covers the entire flange and push ring. The hem is designed to hold the outer periphery of the insertion part, and a screw hole is provided on the periphery of the push ring side of the cover, and the entire cover is split in half, with several claws attached to the hem of one cover on the screw hole side. A semicircular arc-shaped catch that holds the outer periphery of the insertion portion is connected to the hem of the screw hole side of the other cover, and the support plate faces the catch and holds the insertion portion. A locking piece is provided protruding from both ends of the semi-circular arc-shaped part that can be held, and a claw hooking edge that can be engaged with the claw is protruded from one side of the semi-circular arc part, and the clamping member is attached to the receiving seat. is formed to fit around the outer periphery of the support metal, and has a hook piece at one end that can be hooked to one of the locking pieces of the support metal, and has a hook piece on the other end that can be opposed to and fastened together with the other locking piece of the support metal. A joint for a main water supply and drainage pipe characterized by having a bolt mounting piece.