JPH0632887U - Pipe fitting - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a pipe joint in which the end position of a connecting pipe can be confirmed when the connecting pipe is completely connected. [Structure] A joint main body 1 having a cylindrical guide portion 11 to be fitted into a connecting pipe 5 and a tool engagement portion 15 which is continuously provided at a base end of the guide portion 11 and whose outer peripheral surface is engaged with a tightening tool. And a substantially cylindrical shape which is fitted concentrically with a gap into which the connecting pipe 5 is inserted in the guide portion 11 of the joint body 1 and has a gap 21 in the axial direction over the entire length so that the diameter can be reduced. A split ring 2 and a retaining ring 3 which is fitted onto the split ring 2 and is pressed inward by tightening a bolt 4, the tool engaging portion of the split ring 2.
15 A pipe joint with a connection pipe insertion confirmation cutout 22 provided near the tip close to the end face.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint used when joining pipe materials such as hot water supply pipes and water supply pipes.

[0002]

[Prior art]

 As a pipe joint used when piping hot water supply pipes and water supply pipes by using a synthetic resin pipe or a composite pipe in which both the inner and outer peripheral surfaces of the metal pipe are covered with synthetic resin, there is no practical use as No. 61-22991. As disclosed in the official gazette, it is known that a joint body, a tightening member, and a cap nut are formed, and the joint body and the connecting pipe are liquid-tightly sealed by tightening the cap nut.

In such a pipe joint, the end portion of the connecting pipe is inserted into a gap between the cylindrical guide portion provided at one end of the joint body and the tightening member, and the cap nut is tightened to tighten the joint. The diameter of the member is reduced so that the connecting pipe is sandwiched between the guide part of the joint body and the tightening member, and the connecting pipe is crimped to the seal part in the groove provided on the outer peripheral surface of the guide part of the joint body. The connection pipe and the guide portion of the joint body are liquid-tightly sealed.

[0004]

[Problems to be solved by the device]

 Therefore, if the end of the connecting pipe is not fully inserted until it comes into contact with the end face of the tool body engaging part of the joint body, and if it is tightened with a cap nut, the connecting pipe will be There was a risk that the pipe might come off.

An object of the present invention is to solve the above problems and to provide a pipe joint in which the end position of a connecting pipe can be confirmed when the connecting pipe is completely connected.

[0006]

[Means for Solving the Problems]

 The pipe joint of the present invention comprises a joint main body having a cylindrical guide portion which is fitted in a connecting pipe and a tool engaging portion which is connected to a base end of the guide portion and engages a tightening tool on an outer peripheral surface thereof. A substantially cylindrical split ring that is fitted concentrically with a gap into which the connecting pipe is inserted in the guide portion of the joint body, and has an axial gap over the entire length and is capable of reducing its diameter. , A press ring that is externally fitted to the split ring and is pressed inward by tightening a bolt, and a connection pipe insertion confirmation cutout portion is provided near the tip end of the split ring near the end face of the tool engaging portion. It is characterized by

The shape of the pipe joint of the present invention is not particularly limited, and it can be applied not only to a male screw adapter described later but also to a female screw adapter, a socket, an elbow, cheese and the like.

The material of the split ring used in the present invention is not particularly limited and may be either metal or synthetic resin, but for example, a copper alloy such as brass is preferably used.

The number of cutouts for checking the connection pipe insertion of the split ring used in the present invention is not particularly limited, but it can be visually recognized from any angle during piping work in a building performed in a limited space. It is preferable that three or more portions are provided at equal intervals so that they can be formed. The shape and size thereof are not particularly limited, but it is preferable that the shape is a square having a side of about 2 to 10 mm so that the inside can be easily viewed.

It is preferable that the outer peripheral surface of the split ring used in the present invention is provided with a groove along which the press ring is fitted so that the press ring does not slide in the axial direction.

As the bolt used in the present invention, a hexagon socket head cap screw is used, which can be tightened with a hexagon wrench from its head portion, and has a narrow space compared to the case where a monkey wrench is used. It is also preferable because it can be installed.

In order to avoid excessive tightening of the presser ring used in the present invention, it is preferable to insert a washer by externally fitting the bolt.

[0013]

The pipe joint of the present invention comprises the joint body, the split ring, and the retaining ring, and the connection pipe insertion confirmation notch is provided near the tip of the split ring near the end face of the tool engaging portion. Whether or not the connecting pipe is fully inserted until it comes close to the end face of the tool body engaging portion of the joint body can be easily seen from the notch even after tightening.

[0014]

【Example】

 Next, the pipe joint of the present invention will be further described with reference to the embodiments of the drawings. FIG. 1 is a partial sectional view showing a use state of the pipe joint of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a perspective view of a split ring used for the pipe joint of the present invention. It is a figure. The pipe joint of the present invention is a male screw adapter including a joint body 1, a split ring 2 and a holding ring 3. The joint body 1 has a cylindrical guide portion 11 at one axial end thereof, and the guide portion 11 has an outer diameter which is the inner diameter of the connection pipe 5 so that the guide portion 11 can be fitted into the connection pipe 5 to be connected. It is made smaller. A groove 12 is circumferentially formed on the outer peripheral surface of the guide portion 11 over the entire circumference, and an annular seal material 13 made of an elastic material such as rubber is fitted in the groove 12. Have been combined. On the outer peripheral surface closer to the tip than the concave groove 12, an annular convex portion 14 that is slip-resistant in the circumferential direction is engraved over the entire circumference.

The base end of the guide portion 11 is concentric with the guide portion 11, has a large diameter, and has a hexagonal outer peripheral surface so that a tightening tool such as a spanner can be engaged with the tool engaging portion 15. Are installed in series. The tool engaging portion 15 is provided with a connecting portion 16 connected to a device such as a valve and other pipe joints on the side opposite to the interior 11 of the plan. It has a small diameter and is concentric with a male screw engraved on its outer peripheral surface.

The split ring 2 has a substantially cylindrical shape and is fitted concentrically with the guide portion 11 of the joint body 1 at a predetermined interval, and has a gap 21 in the axial direction over the entire length. It is possible to reduce the diameter. At the tip end that abuts the end surface of the tool engaging portion 15, rectangular connection pipe insertion confirmation cutout portions 22 are provided at three locations including one end facing the gap 21 at substantially equal intervals. An engaging convex portion 25 is provided on the inner surface of the front end portion of the split ring 2, and is engaged with a concave groove 17 provided along the end surface of the tool engaging portion 15 of the joint body 1. The outer peripheral surface of the split ring 2 is engraved with a concave groove 23 into which the presser ring 3 is fitted along the circumferential direction, and the inner peripheral surface is provided with three protrusions 24 having a substantially semicircular cross section. They are arranged side by side in the circumferential direction.

The holding ring 3 has a substantially cylindrical portion 31 fitted in the groove 23 of the split ring 2, and a tightening portion 32 which is opposed to each other at both ends of the substantially cylindrical portion 31 and which is screwed to the tightening portion 32. The split ring 2 is pressed inward by tightening 4 so that the connection pipe 5 and the guide portion 11 of the joint body 1 are liquid-tightly sealed.

When the pipe joint of the present invention is used, the connecting portion 16 of the joint body 1 is to be connected by engaging and rotating a tightening tool such as a wrench with the outer peripheral surface of the tool engaging portion 15 to be connected. Or screwed into the screw part of another pipe joint.

Next, the connecting pipe 5 is inserted into the gap between the guide portion 11 and the split ring 2 until the tip approaches the end surface of the tool engaging portion 15. At this time, whether or not the tip of the connecting pipe 5 is sufficiently inserted until it comes close to the end face of the tool engaging portion 15 is visually confirmed by the connecting pipe insertion confirmation cutout portion 22.

In this state, if the hexagon socket head cap screw 4 screwed into the tightening portion 32 of the presser ring 3 is tightened using a hexagonal wrench, the split ring 2 is reduced in diameter and the outer peripheral surface of the connecting pipe 5 is reduced. Is pressed inward over substantially the entire circumference and is crimped to the seal material 13 fitted in the groove 12 on the outer peripheral surface of the guide portion 11. As a result, the connecting pipe 5 is sandwiched between the guide portion 11 of the joint body 1 and the split ring 2, and the inner peripheral surface of the connecting pipe 5 and the outer peripheral surface of the guide portion 11 are made liquid-tight by the sealing material 13. Sealed.

[0021]

[Effect of device]

 Since the pipe joint of the present invention is constructed as described above, whether or not the connecting pipe is sufficiently inserted until it is close to the end face of the tool engagement portion of the joint body can be connected even after tightening the bolt. It can be easily seen from the notch of the pipe insertion confirmation, and due to lack of insertion of the connecting pipe, the connecting pipe will be pulled out and water leakage will not stain the interior materials such as the ceiling, walls and floor in the room. .

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a use state of a pipe joint of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a perspective view of a split ring used in the pipe joint shown in FIG.

[Explanation of symbols]

 1 Joint body 2 Split ring 3 Holding ring 4 Bolt 5 Connection pipe 11 Guide cover 15 Tool engagement part 21 Gap 22 Connection pipe insertion confirmation cutout

Claims (1)

[Scope of utility model registration request] 1. A joint main body having a cylindrical guide portion to be fitted in a connection pipe and a tool engagement portion that is continuously provided at a base end of the guide portion and has a peripheral surface to which a tightening tool is engaged. A substantially cylindrical split ring which is concentrically fitted to the guide portion of the joint body with a gap inserted between the guide pipes and has an axial gap over the entire length, the split ring being capable of being reduced in diameter. It consists of a retaining ring that is externally fitted to the split ring and is pressed inward by tightening a bolt, and a connection pipe insertion confirmation cutout portion is provided near the tip end of the split ring that is close to the end face of the tool engagement portion. A pipe joint characterized by the following.