JP2002323179A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint eliminating the possibility of being pulled out of a recessed groove, even if unduly stress is applied to an elastic cutoff material, at connecting of pipes. SOLUTION: This pipe joint 1 is provided with an insertion port 12, at least in one end part, and a recessed groove 13 is provided along the circumferential direction, in the outer circumferential surface of the insertion port 12; both the side surfaces of the recessed groove 13 are formed into slope surfaces 131, so that the interval is gradually made narrowed; approaching toward the opening part, and the internal circumferential side of the annular elastic cutoff material 14 is inserted in the recessed groove 13; both the side surfaces of the elastic cutoff material 14 are formed into slope surfaces 141, whose interval gradually narrows approaching toward the diametrical outward direction, and the width of the innermost circumferential part is formed wider than the opening width but narrower tan the innermost width of the recessed groove 14, and the width of the outermost circumferential part is formed narrower than the opening width of the recessed groove 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint which is joined via an elastic water blocking material in a receiving system.

[0002]

2. Description of the Related Art Recent residential plumbing systems include, for example,
2. Description of the Related Art A method of connecting a flexible pipe such as a cross-linked polyethylene pipe or a polybutene pipe by connecting a pipe material with a pipe joint has been widely used. Conventionally, as a pipe joint for connecting such a flexible pipe to a pipe material, a pipe joint joined via an elastic water blocking material in a receiving method has been increasing.

[0003] Conventionally, a pipe joint joined via an elastic water-stopping material is described in, for example, Japanese Patent Application Laid-Open No. 59-187189, and as shown in FIG. The O-ring f was fitted in a concave groove formed between the rising wall on the back side of the formed large diameter portion c and the head e of the collet d inserted in the large diameter portion c. Things have been suggested.

However, the socket b of such a pipe joint has
When the pipe p is inserted in a state where the pipe axis angles are shifted from each other, an excessive stress acts on the O-ring f, and the O-ring f comes out of the enlarged portion c. There is a point.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, and does not cause the pipe to fall out of the groove even if an unreasonable stress acts on the elastic water-stopping material when connecting the pipe. The purpose is to provide a joint.

[0006]

An invention (invention 1) according to claim 1 of the present application is a pipe joint having an insertion hole provided at least at one end thereof, and has a circumferential direction formed on an outer peripheral surface of the insertion hole. A groove is provided along the groove, and the groove has an inclined surface such that the distance between the both sides gradually narrows toward the opening. The peripheral side is inserted, and the elastic water-stopping material is an inclined surface such that the distance between the two sides gradually narrows toward the outside in the radial direction,
A pipe joint wherein the width of the innermost peripheral portion is wider than the opening width of the concave groove and smaller than the innermost width, and the width of the outermost peripheral portion is smaller than the opening width of the concave groove.

The invention described in claim 2 of the present application (the present invention 2)
Is a pipe joint provided with a receiving port at least at one end, a concave groove is provided along the circumferential direction on the inner peripheral surface of the receiving port, gradually as both sides of the concave groove toward the opening. The outer peripheral side of an annular elastic water-stopping material is inserted into the concave groove, and the elastic water-stopping material gradually decreases as both side surfaces inward in the radial direction. It is an inclined surface such that the gap between them is narrowed, the width of the outermost peripheral portion is wider than the opening width of the concave groove, narrower than the innermost width, and the width of the innermost peripheral portion is smaller than the opening width of the concave groove. Pipe fittings.

[0008]

According to the pipe joint of the first aspect of the present invention, a concave groove is provided on the outer peripheral surface of the insertion hole along the circumferential direction, and the concave groove gradually narrows as both sides face the opening. The inner peripheral side of an annular elastic water-stop material is inserted into the concave groove, and the distance between the elastic water-stop materials gradually narrows as both side surfaces face outward in the radial direction. Such an inclined surface, the width of the innermost peripheral portion is wider than the opening width of the concave groove, narrower than the innermost width, and the width of the outermost peripheral portion is smaller than the opening width of the concave groove. When the connection is made by inserting the insertion port into the end of the pipe to be connected, the elastic water stop Since the inclined surface of the side surface on the inner peripheral side of the material is caught by the inclined surface of the concave groove, the elastic waterproofing material is prevented from coming off from the concave groove.

In the pipe joint according to the second aspect of the present invention, a concave groove is provided in the inner peripheral surface of the receiving port along the circumferential direction, and the gap between the both sides of the concave groove gradually narrows toward the opening. The outer peripheral side of an annular elastic water-stopping material is inserted into the concave groove, and the elastic water-stopping material is inclined such that the distance between the two ends gradually decreases toward the radially inward side. The width of the outermost peripheral portion is wider than the opening width of the concave groove and narrower than the innermost width, and the width of the innermost peripheral portion is smaller than the opening width of the concave groove. When connecting to insert the end of the pipe to be piped into the receiving port, even if unreasonable stress is applied to the elastic water blocking material such that the pipe axes are shifted, the inner circumference of the elastic water blocking material Since the inclined surface of the side surface on the part side is hooked on the inclined surface of the concave groove, the elastic water blocking material is prevented from coming off from the concave groove.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described by way of embodiments with reference to the drawings. Drawing 1 is an explanatory view of an example of a pipe joint of the present invention. As shown in FIG. 1, the pipe joint 1 of this example
Is provided at one end of a pipe joint body 11 made of a metal material such as a copper alloy with an insertion opening 12 for connecting an end of a pipe to be piped. The other end of the pipe joint body 11 may be provided with an insertion port provided at one end, or may be provided with a receiving port. The material of the pipe joint body 11 is not limited to a metal material, but may be a synthetic resin.

A groove 13 is formed on the outer peripheral surface of the insertion opening 12 along the circumferential direction. The concave groove 13 is formed as inclined surfaces 131, 131 such that the distance between the grooves gradually narrows as both side surfaces approach the opening. The concave groove 13 is usually formed by grinding or the like. In the concave groove 13, an inner peripheral side of an annular elastic water-stopping material 14 made of a rubber material generally used for packing is inserted.

The elastic water-stopping material 14 is formed as inclined surfaces 141 and 141 such that the distance between the two surfaces gradually decreases as the both sides face outward in the radial direction. The width of the innermost peripheral portion of the elastic water-stopping material 14 is wider than the opening width of the concave groove 13 of the pipe joint body 11 and narrower than the innermost width thereof. The width is smaller than the opening width of the groove 13.
Thereby, when the insertion 21 of the pipe joint 1 is connected by inserting it into the end 3 of the pipe to be piped, unreasonable stress such as mutual pipe axes being shifted to the elastic water-stopping material 14. Acts, the inclined surface 14 on the inner peripheral side of the elastic water-stopping material 14.
Since the hooks 1 and 141 are hooked on the inclined surfaces 131 and 131 of the groove 13, the elastic waterproof material 14 is prevented from being detached from the groove 13.

FIG. 2 is an explanatory view of another example of the pipe joint of the present invention. As shown in FIG. 2, the pipe joint 2 of this example is provided with a socket 22 for connecting an end of a pipe to be piped to one end of a pipe joint body 21 made of a copper alloy. The other end of the pipe joint body 21 may be provided with a socket provided at one end, or may be provided with an insertion port.
Further, the material of the pipe joint body 21 is not limited to a metal material, but may be a synthetic resin.

A recessed groove 23 is formed in the inner peripheral surface of the receiving port 22 along the circumferential direction. The concave groove 23 is formed as inclined surfaces 231 and 231 such that the gap gradually narrows as both side surfaces approach the opening. The concave groove 23 is usually formed by grinding. An annular elastic water-stopping material 2 made of a rubber material generally used for packing is provided in the concave groove 23.
The lower part of 4 is fitted.

The elastic water-stopping material 24 is formed as inclined surfaces 241, 241 such that the distance between the two sides gradually decreases toward the inside in the radial direction. The width of the outermost peripheral portion of the elastic water-stopping material 24 is wider than the opening width of the concave groove 23 of the pipe joint body 21 and narrower than the innermost width thereof. The width is smaller than the opening width of the groove 23.
Reference numeral 24 denotes an incore that supports the inside of the insertion end of the pipe 3 to be piped. Thereby, when connecting so as to insert the end of the pipe to be piped into the receiving port 21 of the pipe joint 2,
Even if an unreasonable stress is applied to the elastic water-stopping material 24 such as when the pipe axes are shifted from each other, the inclined surfaces 241 and 241 on the inner peripheral side of the elastic water-stopping material 24 are inclined by the concave groove 23. Faces 231,2
Since the elastic waterproofing member 24 is hooked on the groove 31, the elastic waterproofing member 24 is prevented from being detached from the groove 23.

[0016]

Since the pipe joint of the present invention is constructed as described above, there is no danger that the pipe joint will fall out of the groove even if an excessive stress acts on the elastic water-stopping material at the time of connecting the pipe.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a pipe joint of the present invention.

FIG. 2 is a cross-sectional view showing another example of the pipe joint of the present invention.

FIG. 3 is a sectional view showing an example of a conventional pipe joint.

[Explanation of symbols]

 Reference numerals 1 and 2 pipe joints 3 pipes 11 and 21 pipe joint main body 12 insertion opening 13 and 23 concave groove 14 and 24 elastic water blocking material 22 receiving opening 131, 141, 21 and 241 inclined surface

Claims (2)

[Claims] 1. A pipe joint having an opening at at least one end, wherein a concave groove is provided in an outer peripheral surface of the insertion port along a circumferential direction, and both side surfaces of the concave groove have openings. The inner peripheral side of an annular elastic water-stopping material is inserted into the concave groove, and both sides of the elastic water-stopping material have a radial direction. The width of the innermost peripheral portion is wider than the opening width of the concave groove and narrower than the innermost width, and the width of the outermost peripheral portion is the concave groove. A pipe joint characterized by being narrower than the opening width of the pipe. 2. A pipe joint having a receiving port provided at least at one end thereof, wherein a concave groove is provided in an inner peripheral surface of the receiving port along a circumferential direction, and both side surfaces of the concave groove are provided in an opening. The outer peripheral side of an annular elastic water-stop material is inserted into the concave groove, and both sides of the elastic water-stop material are radially inward. The width of the outermost peripheral portion is wider than the opening width of the concave groove and narrower than the innermost width, and the width of the innermost peripheral portion is the opening width of the concave groove. A pipe joint characterized by being narrower than that.