JPH0583570U - Pipe fitting - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a pipe joint in which the tightening of nuts can be easily confirmed without mounting extra parts. [Structure] A pipe joint in which a male screw and a nut provided at the end of the joint body are screwed together to compress and connect a packing mounted between the joint body and the nut. The pipe joint is characterized in that a color paint which can be easily discriminated is applied, and when the nut is tightened, the color paint disappears so that it can be discriminated that the nut is tightened.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint for connecting to a pipe by tightening a nut and a main body of a pipe used for gas, water, etc., and more particularly to a pipe joint for visualizing tightening confirmation of the nut.

[0002]

[Prior Art]

 In the conventional pipe joint that tightens the nut and connects it to the connecting pipe, forgetting to tighten the nut may cause leakage after the piping or the pipe may come off, which is a major mistake in the implementation. For this reason, as a pipe joint capable of confirming tightening of the nut, the one shown in FIGS. 3 and 4 is disclosed in Japanese Utility Model Laid-Open No. 63-145 089. When the colored disc spring 5 is attached to the male screw 8 of the joint body 9 and the nut 11 is tightened, the disc spring 5 is sandwiched between the disc spring 5 and the collar 9a provided on the joint body 9. The tightening of the nut 11 is confirmed by making the colored surface 5a of the disc spring 5 invisible.

[0003]

[Problems to be solved by the device]

 In the above conventional technique, the joint body 9 must be provided with a collar 9a for mounting the disc spring 5. In addition, unless the disc spring 5 is attached to the male screw 8 of the joint body 9, the effect will not be obtained. Therefore, if the disc spring 5 is forgotten to be attached, the nut 11 may be overtightened or forgotten. Further, since the side surface of the disc spring 5 is the colored surface 5a, it is difficult to see the colored surface 5a, and it is difficult to perform confirmation work in a distant place or a dim place. The present invention solves the above-mentioned problems and provides a pipe joint in which the tightening of the nut can be easily confirmed without mounting extra parts.

[0004]

[Means for Solving the Problems]

 The gist of the present invention is to provide a pipe joint in which a male screw and a nut provided at the end of the joint body are screwed together to compress and connect a packing mounted between the joint body and the nut. A pipe joint characterized in that a colored paint that can be easily discriminated from the outside is applied to the surface so that when the nut is tightened, the colored paint disappears and the nut is tightened. Is. If the colored paint contains fluorescent material, it will be easier to visually distinguish it from the base material of the male thread of the joint body. Also, if the colored paint contains an adhesive, it has the effect of preventing loosening after tightening the nut.

[0005]

[Action]

 Since the present invention has the above-mentioned structure, the colored paint applied to the surface of the male screw cannot be seen from the outside by the screw-fastening of the nut and the male screw of the joint body. For this reason, the colored surface of the male screw that was confirmed before tightening disappears when the nut is tightened, and it is easy to confirm that tightening has been completed. Also, since it is applied directly on the surface of the male screw, the colored surface is wide and it is easy to check from the outside. By applying a paint containing fluorescent material to the male screw, the colored surface can be easily confirmed even in a distant or dim place. Also, applying paint containing an adhesive will prevent the nut from loosening after tightening the nut, and ensure a long-term reliable tightening.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the state before tightening the nut, and FIG. 2 shows the state after tightening the nut. In FIG. 1, a male screw 2 is provided on the outer surface of a joint body 1, and a nut 3 is screwed onto this male screw 2 to connect a pipe 4. By screwing the nut 3, the packing and the biting member provided between the joint body 1 and the nut 3 are compressed to seal the pipe 4 and prevent the pipe 4 from pulling out.

A coloring paint 5 is applied to the surface of the male screw 2 of the joint body 1. As the coloring paint 5, paint or lacquer is used, and a paint of a clean color such as yellow, red, or blue that is easy to distinguish from the color of the base material of the male screw is preferable. If the colored paint 5 contains a fluorescent material or an adhesive, the colored paint 5 can be easily discerned from a distance or in a dark place, and the adhesive prevents the nut from loosening. As shown in Fig. 2, when the tightening of the nut 3 is completed, the colored surface of the male screw that was visible before tightening disappears, and it can be easily confirmed from the outside that the tightening of the nut 3 is completed.

[0007]

[Effect of the device]

 As described above, with the pipe joint of the present invention, it is possible to confirm the tightening of the nut at the time of connection without an extra component or a flange on the joint body.Because the colored surface area is larger than before, it is easy. Can be determined.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention before tightening a nut.

FIG. 2 is a view showing an embodiment of the present invention after tightening the nut.

FIG. 3 is a view showing a conventional technique before tightening a nut.

FIG. 4 is a view showing a conventional technique after tightening a nut.

[Explanation of symbols]

 1 Joint body 2 Male thread 3 Nut 4 Connection pipe 5 Colored paint

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. In a pipe joint in which a male screw and a nut provided at an end portion of the joint body are screwed together to compress and connect a packing mounted between the joint body and the nut, the surface of the male screw of the joint body is connected. , Apply a colored paint that can be easily distinguished from the outside,
A pipe joint characterized in that when the nut is tightened, the colored paint disappears so that it can be determined that the nut has been tightened.