JP2843969B2 - Fire thread fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threaded joint used for connecting fire hoses to each other or to fire equipment such as a fire hydrant valve or a nozzle, and is provided in a fire hose or a fire equipment. Receptacles that can be connected to either screw-type outlets (male fittings) or receptacles (female fittings)
The present invention relates to a fire-fighting screw joint that is also used as an outlet.

[0002]

2. Description of the Related Art Generally, a fire brigade fires a fire by using a fire hose loaded in a fire engine or a fire hose in a hose storage box installed in each building when a fire occurs. This fire hose is usually wound in a spiral shape and has a screw-type receptacle (female metal fitting) at one end.
However, a screw-type socket (male fitting) is provided at the other end.

[0003] In the event of a fire, the fire brigade takes out a fire hose that is wound spirally and puts it, and has a receptacle (female metal fitting) at the outlet of the fire hydrant valve. (Male fitting), extend the fire hose, and then connect the screw-type receptacle (female fitting) provided at the base end of the nozzle to the outlet (male fitting) at the tip of the fire hose. Like that.

[0004] In addition, the fire brigade fights a fire by connecting two or more fire hoses when the fire is far away. That is, while one person is connecting the first fire hose to the hydrant valve and stretching it, the other person extends the second fire hose from near the tip of the first fire hose, and then the first fire hose The second fire hose is connected.

[0005]

However, if the direction of the second fire hose is wrong, the connection between the first and second fire hoses becomes an outlet and cannot be connected. In this case, the first and second fire hoses are connected by rewinding the second fire hose once. Therefore, there is a problem that if the direction of the fire hose is wrong, it takes much time to discharge water.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object a screw-type outlet (male fitting) provided in a fire-fighting equipment such as a fire hose or a fire hydrant valve.
It is an object of the present invention to provide a fire-fighting threaded joint that can be connected to any of the socket and the receptacle (female metal fitting).

[0007]

In order to achieve the above-mentioned object, a fire-fighting threaded joint according to the present invention has a male thread for connection formed on the outer peripheral surface at one end and a fire-fighting arm at the other end. A cylindrical insertion fitting connected to the hose, and rotatably and axially movably fitted on the outer peripheral surface of the insertion fitting to openably cover the male screw portion of the insertion fitting and connected to the inner peripheral surface at one end. Female screw is formed, and a portion where the female screw is formed comprises a substantially cylindrical receiving metal fitting that can protrude outward from the male screw part of the insertion metal fitting.
And the female screw of the receiving fitting are screwed together
It is.

[0008]

When the receiving fitting is moved in a predetermined direction along the insertion fitting and the male screw forming portion of the insertion fitting is opened, the threaded fitting becomes a joint having an outlet structure. or,
When the receiving metal fitting is moved in the opposite direction along the insertion metal fitting and the female screw portion of the receiving metal fitting is protruded outward from the male screw part of the insertion metal fitting, a joint having a socket structure is obtained. As a result, when this threaded joint is provided at both ends of the fire hose and the fire hoses are connected to each other, the threaded joint has a structure of an inlet and a receptacle, regardless of the orientation of the fire hose. In addition, both fire hoses can be connected satisfactorily and reliably. That is, it is possible to eliminate a failure or waste in the work of extending the fire hose, and to perform a quick fire fighting activity. Further, it can be connected to a conventional screw-type receptacle or outlet provided in a fire-fighting device such as a fire hose or a fire hydrant valve, which is extremely convenient.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 and 2 show a fire-fighting threaded joint 1 according to an embodiment of the present invention. The threaded joint 1 has a tubular insertion fitting 2 and a substantially cylindrical receiver having a diameter larger than that of the insertion fitting 2. And a fitting 3 and are attached to both ends of a fire hose (not shown).

The insert fitting 2 has a stepped cylindrical outer peripheral surface made of a metal material. A male screw 2a for connection is formed on the outer peripheral surface at one end, and the other end is used for firefighting. It can be connected to a hose (not shown).
That is, the insertion fitting 2 is a thick wall having an external thread 2a for connection which is screwed into a screw-type receptacle (female fitting) provided on a fire-fighting device such as a fire-fighting hose or a nozzle on one end outer peripheral surface. A connecting portion 2b, a body portion 2c thinner than the connecting portion 2b connected to the connecting portion 2b and having a receiving metal fitting 3 described later rotatably and movably moved in the axial direction and connected to the body portion 2c. And a mounting portion 2d attached to the end of the fire hose. An annular packing 4 made of tetrafluoroethylene resin is fitted to the end face of the connecting portion 2b.

The receiving fitting 3 is formed in a substantially cylindrical shape by a metal material, is fitted around the outer peripheral surface of the fitting 2 so as to be rotatable and movable in the axial direction, and opens the connecting portion 2b of the fitting 2. A female screw 3a for connection is formed on the inner peripheral surface of one end portion, and the portion where the female screw 3a is formed can be projected outward from the connecting portion 2b of the insertion fitting 2. That is, the receiving fitting 3 is the trunk 2 c of the insertion fitting 2.
An annular sliding portion 3b which is fitted on the outer peripheral surface so as to be rotatable and movable in the axial direction; 3a is formed, and a portion where the female screw 3a is formed comprises a nut portion 3c which can protrude outward from the male screw 2a portion of the insertion fitting 2. The nut 3c is adapted to be screwed into a screw-type outlet (male fitting) provided in a fire-fighting device such as a fire hose or a fire hydrant valve. The receiving fitting 3 is prevented from falling off from the body 2c by a ring 6 fitted at the boundary between the body 2c of the insertion fitting 2 and the mounting part 2d.

The length of the connecting portion 2b of the insertion fitting 2 and the length of the receiving fitting 3 are determined by moving the receiving fitting 3 to the mounting portion 2d side of the insertion fitting 2 as shown in FIG. Is brought into contact with the ring 5, the receiving fitting 3 faces the body 2 c of the insertion fitting 2, and the connecting part 2 b is opened, and as shown in FIG. 2, the receiving fitting 3 is connected to the connecting part 2 b of the fitting 2. When the sliding portion 3b is moved to the side to contact the step portion of the connecting portion 2b, the nut portion 3c covers the connecting portion 2b, and the portion of the nut portion 3c where the female screw 3a is formed is connected to the connecting portion 2b. Are also set to protrude outward. Furthermore, the pitch and the like of the male screw 2a of the insertion fitting 2 and the female screw 3a of the receiving fitting 3 are set to be the same so that the two screws 2a, 3a are screwed together.

The threaded joint 1 is attached to the fire hose by fitting the mounting portion 2d of the fitting 2 to the end of the fire hose.

When two or more fire hoses provided with the threaded joints 1 at both ends are connected, as shown in FIG.
Insert the receiving fitting 3 of the threaded joint 1 (joint 1 on the left side in the figure) provided at the end of one fire hose into the body 2c of the fitting 2
Side to open the connecting portion 2b of the left plug-in fitting 2, and the receiving fitting 3 of the threaded joint 1 (the right joint 1 in the figure) provided at the end of the other fire hose. And the female screw 3a of the right receiving metal fitting 3 is projected outward beyond the connecting part 2b, and the nut 3c of the right receiving metal fitting 3 is connected to the connecting part 2b of the left insertion metal fitting 2. It is good to screw it down. As a result, the fire hoses are connected via the threaded joints 1 and 1. When the right fitting 3 is tightened into the left fitting 2, the sliding portion 3 b of the right fitting 3 comes into contact with the step portion of the connecting portion 2 b of the right fitting 2, The insertion fitting 2 is pressed toward the left joint 1. As a result, the packings 4, 4 of the two joints 1 are brought into close contact with each other, and the connection portion is sealed well and reliably.

In this threaded joint 1, the receiving metal fitting 3 is moved along the insertion metal fitting 2 to open the connecting portion 2b of the insertion metal fitting 2, or the female screw 3a of the nut 3c of the receiving metal fitting 3 is inserted. By protruding outward from the connection portion 2b of the metal fitting 2, a joint having a socket structure or a socket structure is obtained. As a result, when the threaded joint 1 is provided at both ends of the fire hose, both fire hoses can be connected to the joints 1, 1 better and more reliably regardless of the orientation of the fire hose. it can.

FIGS. 4 and 5 show a conventional screw-type receptacle 6 (female metal fitting) and a screw-type socket 7 (male type) provided with the threaded joint 1 of the present invention, for example, at the end of a fire hose. (Metal fitting)

That is, when the threaded joint 1 is connected to the conventional socket 6, as shown in FIG. 4, the receiving fitting 3 is moved to the body 2c side of the inserting fitting 2, and the connecting portion 2b of the inserting fitting 2 is moved. Is released, and the nut 8 of the receptacle 6 is tightened into the connecting portion 2b of the insertion fitting 2, and the insertion fitting 2 of the threaded joint 1 and the nut 8 of the receptacle 6 are screwed. by this,
The joint 1 and the receptacle 6 are connected. When the nut 8 of the receiving port 6 is tightened into the connecting portion 2b of the insertion fitting 2, the inner peripheral edge of the nut 8 comes into contact with the flange portion 9a of the cylindrical portion 9 of the receiving port 6, and the cylindrical portion 9 is connected to the connecting portion. 2b side. As a result, the gasket 4 of the joint 1 and the gasket 10 of the receiving port 6 come into close contact with each other, and the connection portion is sealed well and reliably.

When connecting the threaded joint 1 to the conventional outlet 7, as shown in FIG. 5, the receiving fitting 3 is moved to the connecting portion 2b side of the insertion fitting 2, and the female screw of the receiving fitting 3 is moved. 3
The portion a is projected outward from the connecting portion 2b, and the nut portion 3c of the receiving fitting 3 is tightened into the male screw portion 7a of the outlet 7, and the receiving fitting 3 of the threaded joint 1 and the male screw of the fitting 7 are screwed. Part 7
a. As a result, the joint 1 and the outlet 7 are connected. When the nut 3c of the receiving member 3 is tightened into the male screw portion 7a of the insertion port 7, the sliding portion 3b of the receiving member 3 comes into contact with the step portion of the connecting portion 2b, and the connecting portion 2b is inserted. Press to mouth 7 side. As a result, the packing 4 of the joint 1 comes into close contact with the end face of the insertion port 7, and the connection portion is sealed well and reliably.

In the above embodiment, the threaded joints 1 of the present invention are connected to each other, or the threaded joints 1 of the present invention are connected to the conventional receptacles 6 and insertion ports 7 provided at the ends of the fire hose. Although connection is made, the threaded joint 1 of the present invention can also be connected to a threaded inlet 7 provided at the discharge port of a fire hydrant valve or a threaded receptacle 6 provided at a nozzle.

[0020]

[0021]

As described above, the fire-fighting threaded joint of the present invention has a cylindrical insertion fitting having a connecting external thread formed on the outer peripheral surface of one end, and a rotatable and axially extending outer peripheral surface of the insertion fitting. A female screw for connection is formed on the inner peripheral surface at one end, and a portion formed with a female screw can protrude outward from the male screw portion of the insertion fitting. Since it is composed of the receiving metal fitting, the receiving metal fitting is moved in a predetermined direction along the insertion metal fitting to open the male screw portion of the insertion metal fitting, and the male screw portion of the receiving metal fitting is formed with the female screw part of the receiving metal fitting. By protruding outward from the threaded portion, a joint having a socket structure and a socket structure is obtained. As a result, when the threaded joint of the present invention is provided at both ends of the fire hose and the fire hoses are connected to each other, the threaded joint has a structure of an inlet and a receptacle, so that the fire hose is oriented in the direction of the fire hose. Regardless, both fire hoses can be connected well and reliably. That is, it is possible to eliminate a failure or waste in the work of extending the fire hose, and to perform a quick fire fighting activity. In addition, since the threaded joint of the present invention is a joint having a receptacle structure or an outlet structure, it can be connected to a conventional screw-type receptacle or outlet provided in fire-fighting equipment such as a fire hose or a fire hydrant valve. It is very convenient. Further, when the male screw of the insertion fitting and the female screw of the receiving fitting are screwed together, the screw-type joint of the present invention can be connected to each other by screw-type joints, which is extremely convenient.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a fire-fighting threaded joint according to an embodiment of the present invention, which is used as an outlet.

FIG. 2 is a partially cutaway front view showing the fire-fighting threaded joint according to the embodiment of the present invention, which is used as a receiving port.

FIG. 3 is a partially cutaway front view when the threaded joints of the present invention are connected to each other.

FIG. 4 is a partially cutaway front view showing a state where the threaded joint of the present invention is connected to a conventional threaded socket.

FIG. 5 is a partially cutaway front view showing a state where the threaded joint of the present invention is connected to a conventional threaded socket.

[Explanation of symbols]

1 is a screw type joint, 2 is a plug fitting, 2a is a male screw of the plug fitting, 3 is a receiving fitting, 3a is a female screw of the receiving fitting, and 4 is a packing.

Claims (1)

(57) [Claims] A male screw (2a) for connection on one end outer peripheral surface.
And a cylindrical plug (2) having the other end connected to the fire hose, and an outer fitting rotatably and axially movable on the outer peripheral surface of the plug (2),
A male screw (2a) portion of the insertion metal fitting (2) is openably covered, and a female screw (3a) for connection is formed on the inner peripheral surface at one end, and the part where the female screw (3a) is formed is a plug metal fitting ( It becomes because the male screw (2a) of the substantially cylindrical possible project outward than the portion receiving metal 2) (3), said plug fitting
The male screw (2a) of the (2) and the female screw (3) of the receiving bracket (3)
a) a fire-fighting threaded joint characterized in that a) is screwed together .