JP2549744Z - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint used for joining pipes such as hot water supply and water supply pipes. 2. Description of the Related Art A pipe joint used for piping a hot water supply pipe and a water supply pipe using a composite pipe in which the inner surface or both inner and outer peripheral surfaces of a synthetic resin pipe or a metal pipe are coated with a synthetic resin is known. , Shokai 61
As disclosed in Japanese Patent Application Laid-Open No. 22991, it is known that a joint body, a connection pipe and a joint body are tightly sealed by tightening the cap nut. In such a pipe joint, an end of the connection pipe is inserted into a gap between a cylindrical guide provided at one end of the joint body and a tightening member, and a cap nut is tightened.
The fastening member is reduced in diameter, the connecting pipe is sandwiched between the guide part of the joint body and the fastening member, and the connecting pipe is pressed against the seal member in the concave groove provided on the outer peripheral surface of the guide part of the joint body. The space between the connecting pipe and the guide portion of the joint body is sealed in a liquid-tight manner. [0004] Accordingly, when the connection pipe is not sufficiently inserted until the end of the connection pipe comes into contact with the end face of the tool engagement portion of the joint main body, when the connection pipe is tightened with the cap nut, water flows. When a test or the like was performed, there was a possibility that the connecting pipe would come off from the pipe joint. [0005] An object of the present invention is to solve the above-mentioned problem and to provide a pipe joint that can confirm an end position of a connection pipe in a state where the connection pipe is completely connected. The pipe joint according to the present invention has a cylindrical guide portion fitted inside the connecting pipe and a fastening tool connected to the base end of the guide portion and connected to the outer peripheral surface thereof. A joint body having a tool engaging portion to be fitted, and a concentric outer fitting with a gap into which a connecting pipe is inserted into a guide portion of the joint body, and a shrinkage having an axial gap over the entire length. It consists of a substantially cylindrical split ring that is made to be diametrical, and a press ring that is fitted onto the split ring and pressed inward by tightening bolts,
A notch for confirming connection pipe insertion is provided at three places including one end facing the gap near the tip end of the split ring near the end face of the tool engaging part. [0007] The shape of the pipe joint of the present invention is not particularly limited.
It is also applicable to female screw adapters, sockets, elbows, cheeses and the like. [0008] The material of the split ring used in the present invention is not particularly limited, and may be a metal or a synthetic resin. For example, a copper-based alloy such as brass is preferably used. [0009] The number of notches for confirming the insertion of the connecting pipe of the split ring used in the present invention is set at equal intervals so that the pipe can be visually recognized from any angle even when performing piping work in a building that is performed in a limited space. There are three places. Further, the shape and size are not particularly limited, but are preferably a square having a side of about 2 to 10 mm so that the inside can be easily viewed. [0010] On the outer peripheral surface of the split ring used in the present invention, the presser ring does not slide in the axial direction.
It is preferable that a concave groove into which the press ring is fitted is formed along the circumferential direction. As the bolt used in the present invention, a hexagon socket head bolt is used, which can be tightened with a hexagon wrench from the head thereof, and has a smaller space than when a monkey wrench is used. It is preferable because the construction is possible. In order to avoid excessive tightening of the holding ring used in the present invention, it is preferable to insert a washer by externally fitting the bolt. The pipe joint according to the present invention comprises a joint body, a split ring and a presser ring, and the notch for confirming insertion of a connecting pipe near the end of the split ring near the end face of the tool engaging portion. Since it is provided at three places including one end facing the gap of the ring, it is determined whether or not the connection pipe is sufficiently inserted until it is close to the end face of the tool engagement portion of the joint body from the notch even after tightening. It can be easily visually recognized. Next, the pipe joint of the present invention will be further described with reference to the embodiments shown in the drawings. FIG. 1 is a partial cross-sectional view showing a use state of the pipe joint of the present invention, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, and FIG. 3 is a perspective view of a split ring used in the pipe joint of the present invention. FIG. The pipe joint according to 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 end in the axial direction, and the outer diameter of the joint portion 1 is smaller than the inner diameter of the connection tube 5 so that the guide portion 11 can be fitted inside the connection tube 5 to be connected. It is made a little smaller. On the outer peripheral surface of the guide portion 11, a concave groove 12 is engraved along the entire circumference in a circumferential direction, and an annular seal material 13 made of an elastic material such as rubber is fitted into the concave groove 12. Have been. On the outer peripheral surface closer to the front end than the concave groove 12, a non-slip annular convex portion 14 is engraved over the entire circumference in the circumferential direction. At the base end of the guide portion 11, a tool engaging portion 15 having a large diameter concentric with the guide portion 11 and having a hexagonal outer peripheral surface so that a tightening tool such as a spanner can be engaged. It is installed continuously. The tool engaging portion 15 is provided with a connecting portion 16 connected to devices such as valves and other pipe joints on a side opposite to the guide portion 11. It has a small diameter concentrically with a male screw. The split ring 2 has a substantially cylindrical shape that is concentrically fitted at a predetermined interval between the split ring 2 and the guide portion 11 of the joint body 1, and has an axial gap 21 over the entire length. The diameter can be reduced. At the tip end which comes into contact with the end face of the tool engaging portion 15, rectangular connection pipe insertion notches 22 are provided at substantially equal intervals at three places including one end facing the gap 21. An engagement projection 25 is protruded from the inner surface of the distal end portion of the split ring 2 and is engaged with a concave groove 17 provided along the end surface of the tool engagement portion 15 of the joint body 1. On the outer peripheral surface of the split ring 2, a concave groove 23 into which the presser ring 3 is fitted is engraved along the circumferential direction, and on the inner peripheral surface, three ridges 24 having a substantially semicircular cross section are formed. It is juxtaposed in the direction. The holding ring 3 has a pair of opposed tightening portions 32 connected to both ends of a substantially cylindrical portion 31 fitted into the concave groove 23 of the split ring 2, and a bolt 4 screwed to the tightening portion 32. To press the split ring 2 inward, so that the space between the connecting pipe 5 and the guide portion 11 of the joint body 1 is sealed in a liquid-tight manner. When using the pipe joint of the present invention, the connecting portion 16 of the joint main body 1 is rotated by engaging a tightening tool such as a wrench on the outer peripheral surface of the tool engaging portion 15 and rotating the device. And other fittings. Next, the connection pipe 5 is inserted into the gap between the guide portion 11 and the split ring 2 until the tip thereof approaches the end face of the tool engagement portion 15. At this time, whether or not the connection pipe 5 has been sufficiently inserted until the tip of the connection pipe 5 approaches the end face of the tool engagement portion 15 is visually recognized by the connection pipe insertion confirmation notch 22. In this state, if the hexagonal bolt 4 screwed to the tightening portion 32 of the holding ring 3 is tightened with a hexagonal wrench, the split ring 2 is reduced in diameter, and the outer peripheral surface of the connection pipe 5 is removed. It is pressed inward over substantially the entire circumference, and is pressed against the sealing material 13 fitted in the concave 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 space between the inner peripheral surface of the connecting pipe 5 and the outer peripheral surface of the guide portion 11 is made liquid-tight by the sealing material 13. Sealed. Since the pipe joint of the present invention is configured as described above, it is determined whether or not the connecting pipe is inserted sufficiently until it comes close to the end face of the tool engaging portion of the joint body. Even after tightening, the connection pipe insertion confirmation notch can be easily seen from the notch, and the connection pipe may drop out due to insufficient insertion of the connection pipe, and water leakage will cause the interior of ceiling, wall, floor, etc. in the room The material is not stained.

[Brief description of the drawings]   FIG.   FIG. 4 is a partial cross-sectional view illustrating a use state of the pipe joint of the present invention.   FIG. 2   FIG. 2 is a sectional view taken along line II-II in FIG. 1.   FIG. 3   It is a perspective view of the split ring used for the pipe joint shown in FIG.   [Explanation of symbols]   1 Fitting body   2 split ring   3 Foot ring   4 bolts   5 Connecting pipe   11 Guide lid   15 Tool engaging part   21 gap   22 Connection tube insertion confirmation notch

Claims (1)

[Claim 1] A cylindrical guide portion to be fitted in a connecting pipe and a tool engagement continuously provided at a base end of the guide portion and having a fastening tool engaged with an outer peripheral surface thereof. A joint body having a portion, and a guide body of the joint body, which is fitted concentrically to the outside with a gap into which the connecting pipe is inserted, and has an axial gap extending over the entire length so that the diameter can be reduced. A connecting ring, which is formed of a cylindrical split ring, and a press ring which is fitted on the split ring and pressed inward by tightening a bolt, and a connecting pipe is inserted near a tip of the split ring close to an end face of a tool engaging portion. confirmation cut-out portion, the inter
A pipe joint characterized by being provided at three places including one end facing a gap .