JP2011140963A - Inverse screw joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint endurable against severe use, with a simple and inexpensive constitution. <P>SOLUTION: A nut 2 constituted of a hose installing metal fitting 1, the nut 2, a nut 3, a nut 4, a spring washer 5 and a pipe 6 is inversely formed in the rotational direction of these screws threaded on the inside and outside. An inside screw of the nut 2 is formed in the same rotational direction as an outside screw of the pipe 6, and the outside screw of the nut 2 is formed in the same rotational direction as the nut 3. The spring washer 5 is supported by the nut fixed to the pipe. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is a pipe joint for gas and liquid pipes, and the joint is not loosened by vibration or rotation of the pipe. It is a joint that can withstand use in harsh conditions.

  In general, this type of joint includes a mechanical joint performed only by tightening a pipe and a nut, and a one-touch joint as a joint used for others.

  However, the above-described mechanical joint is less expensive due to vibration and tube rotation. In addition, the one-touch joint is complicated in structure, and is fragile and expensive due to the biting of foreign objects in harsh environments.

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a joint that can have a simple and inexpensive configuration and can withstand severe conditions.

  In order to achieve the above object, the reverse screw joint according to the present invention is composed of a nut for connecting a pipe and a nut having a reverse screw cut for further tightening the nut.

  In the above configuration, when a force acts in a direction in which the nut for tightening the tube is loosened from the tube, the nut tightening the nut has a structure in which a further tightening force acts due to the reverse screw.

  In addition, since the structure is simple, it is difficult to break even in harsh conditions, and the cost is low.

The best embodiment of the present invention will be described with reference to the drawings. Embodiment described below is only an example which actualized this invention, and does not limit the technical scope of this invention. 1 is a front view of a reverse screw joint according to an embodiment of the present invention, FIG. 2 is a side cross-sectional view of the reverse screw joint, and is a cross-sectional view taken along line AA in FIG. 1, and FIG. It is a right view including a partial cross section of the joint.
In each figure, the reverse screw joint 1 according to this embodiment is a joint between a hose and a pipe.

  The hose fitting 1 on one side of the joint can be rotated by being inserted into a nut 2 that matches a screw carved on the pipe 6. In addition, a nut 3 that fits a screw carved on the outside of the nut 2 is inserted into one of the pipes 6 and is rotatable. Subsequently, a spring washer 4 smaller than the inner diameter of the nut 3 is inserted. Subsequently, the nut 5 that fits the screw of the tube 6 and is smaller than the inner diameter of the nut 3 is fixed at an appropriate position by welding, screw crushing, adhesive, or the like. Also, the tightening rotation direction AB of the screws 7 and 8 is engraved in reverse. It has the above configuration.

  When the hose and the pipe are connected with the reverse screw joint of the present invention having the above-described configuration, the nut 2 is first screwed into the pipe and tightened until the hose fitting 1 is in close contact with the nut 2 and the pipe 6 as shown in FIG. Next, the nut 3 is fastened to the screw engraved on the outside of the nut 2, and the rotation to loosen by the force of the spring washer 5 is stopped.

  In the above embodiment, the example used for the joint relating to the hose and the pipe is shown. However, the reverse screw joint of the present invention is not limited thereto, and the pipe and pipe shown in FIG. 4 and the hose and hose shown in FIG. It can be applied as a joint to a machine integrated with the pipe shown in FIG.

The present invention is a front view of a reverse screw joint according to an embodiment. It is sectional drawing of the said reverse thread joint, and is the sectional view on the AA line in FIG. It is a right view of the said reverse thread joint. It is a reverse screw joint sectional view concerning another embodiment of the present invention. It is a reverse screw joint sectional view concerning another embodiment of the present invention. It is a side view which shows the aspect using the said reverse thread joint.

1 Hose mounting bracket 2 Nut 3 Nut 4 Nut 5 Spring washer 6 Tube 7 Threading Rotation direction pitch A
8 Threading rotation direction pitch B
9 Compressor 10 Joint Fig. 1
11 Joint Fig. 4
12 joints Fig. 1
13 breaker 14 hose

Claims (1)

  The nut that is screwed into the tube is threaded inward and outward, and the direction of rotation of these screws is reversed. Further, when the nut is tightened, the nut is configured not to reverse by a spring washer. The spring washer is supported by a nut fixed to the tube. Such a joint.

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