JPH0519086Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a plug-in coupling fitting that is attached to the ends of fire hoses and used to connect the hoses together.

<Prior art> Hemp hoses or rubberized hoses for firefighting use include
There are five types of pipe diameters, but the standard length of each hose is 20 m. Therefore, when using the hose, the hoses are usually connected to each other using a plug-in coupling fitting to obtain the desired hose length.

As shown in Fig. 2, the conventional plug-in coupling fitting has a receiving fitting 1 provided at one end of the hose.
A fitting 2 provided at the other end of the hose is inserted into the hose, and the connection is made by fitting the hook member 3 inwardly by a leaf spring (not shown) to prevent it from coming off. A wide circumferential groove 5 is formed on the outer periphery of the tightening ring 4, and a protective rubber band 6 is attached to the circumferential groove 5. (Refer to pages 338-340 of ``Fire Equipment Engineer Essentials,'' published by National Additions and Laws Publishing Co., Ltd., March 1, 1971).

<Problem to be solved by the invention> However, with such conventional plug-in coupling fittings, when multiple hoses are connected and used, the hoses are bent or laid in a meandering manner, and then the hoses are When it is pulled, the rubber hand 6 is in contact with the ground, so the coupling fitting rolls and the hose is twisted.

If the hose is twisted in this way, it will be difficult for water to pass through even when water is flowing through it, and in extreme cases, it will not be possible to pass water through the hose, so it is necessary to correct the twist by manually turning the connection part, and the water flow will not start. I had a problem with it being late.

In view of these conventional problems, the present invention aims to provide a coupling fitting that does not cause twisting of the hose.

<Means for Solving the Problem> Therefore, the inventor of the present invention has repeatedly considered various measures to prevent twisting of the hose connection part, and has developed a method to prevent the connection part from rotating by providing a rotating ring around the outer circumference of the tightening ring. We found that this method is preferable, and adopted the following configuration.

In other words, in a plug-in coupling fitting for a fire hose consisting of a receiving fitting provided on one fire hose and a fitting provided on the other fire hose, the tightening ring is screwed onto the outer periphery of the receiving fitting. A circumferential groove is formed on the outer periphery, and a rotary ring is rotatably mounted in the circumferential groove.

<Function> In the above configuration, the rotating ring on the outer periphery of the tightening ring can rotate independently of the tightening ring, so even if the hose is stretched and comes into sliding contact with the ground after the hose is installed, Only the rotating wheel rotates, preventing twisting of the hose.

<Example> An example of the present invention will be described below based on FIG. 1.

The socket A side formed at one end of the hose has a receiving fitting 11 whose diameter expands at the tip and has an inwardly annular projection 11a at the tip, and three locations in the circumferential direction at the tip of the annular projection 11a. A tapered portion 12 is formed on the inner periphery of the distal end side by being biased inwardly by a leaf spring (not shown).
It is composed of a pawl member 12 having a shape of 1.a, and a tightening ring 13 having an inwardly directed annular hook portion 13a at its tip and screwed onto the outer periphery of the receiving metal fitting 11. Further, a rubber packing 11b is attached to the inner peripheral portion of the receiving fitting 11, and a ring-shaped member 13b is attached to the inner surface of the annular hook portion 13a of the tightening ring 13.

In addition, the spigot B side formed at the other hose end includes a spigot 15 having a flange-like part 15a formed at the tip and a step on the proximal end serving as a locking part 15b, and an outer periphery of the spigot 15. The push ring 17 is slidably fitted into the push ring 17 and has its proximal end regulated by a retaining ring 16.

Here, as a configuration according to the present invention, the tightening ring 13
A wide circumferential groove 18 is formed on the outer periphery, and a rotating wheel 19 is rotatably mounted in the circumferential groove 18. The rotating ring 19 may be made of any material and manufactured by any method as long as it fits in the circumferential groove 18 of the tightening ring 13 and is rotatable, but metal, hard synthetic resin, etc. are suitable. In addition, when using a synthetic resin pipe cut into rings as the rotating wheel 19, it is heated and expanded.
This can be done simply by attaching it to the circumferential groove 18 and then cooling it to return it to its original dimensions.

Furthermore, a band 20 made of relatively soft rubber or synthetic resin is integrally attached to the outside of the rotating wheel 19 with adhesive or the like. This is the rotating wheel 19
In addition to protecting the rotary wheel 19 from contact with the ground, etc.
It helps the rotation of.

In use, the tapered part 12a of the pawl member 12 is pushed with the tip of the insert 15, and the receiving fitting 11 and the insert 15 are docked while expanding the pawl member 12. With both of them in the proper position, the pawl member 12 is hooked on the locking portion 15b of the insert 15. And the pawl member 12
is supported by the hook portion 13a.

When removing the push ring 17, the push ring 17 is moved forward, and its tip presses the tapered portion 12a of the pawl member 12 to expand the pawl member 12, and in this state, the insert fitting 15 is pulled out.

In the present invention, the rotary ring 19 is rotatably attached to the outer circumference of the tightening ring 13, so even if the hoses are pulled after connecting a plurality of hoses, the band 20 remains in contact with the ground, etc. Since the rotating wheel 19 integrated with the hose can rotate along the circumferential groove 18 independently of the tightening ring 13 that is fixed integrally with the hose, the rotation is not transmitted to the hose, thereby preventing twisting of the hose. can be avoided.

<Effects of the invention> As explained above, according to the invention, since the rotary ring is rotatably provided in the circumferential groove on the outer periphery of the tightening ring,
Even if a force to rotate the hose is generated due to contact with the ground or the like due to the movement of the hose, this force is absorbed by the rotation of the rotating wheel, and the effect that twisting does not occur in the hose itself can be obtained. Further, according to the present invention, the above effects can be obtained with a simple structure.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention, and FIG. 2 is a sectional view of a main part showing a conventional example. 11... Receiving metal fitting, 12... Pawl member, 13...
...shime ring, 15... insert fitting, 17... press ring,
18... Circumferential groove, 19... Rotating wheel.

Claims (1)

[Scope of utility model registration request] In a fire hose plug-in fitting consisting of a receiving fitting provided on one fire hose and a fitting provided on the other fire hose, the outer periphery of the tightening ring screwed onto the outer periphery of the receiving fitting is forming a circumferential groove,
A plug-in coupling fitting for a fire hose, characterized in that a rotating ring is rotatably attached to the circumferential groove.