JP3458229B2 - Double water gun - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water spray gun used for extinguishing a fire, and more particularly to a double water spray gun having a large capacity nozzle and a small capacity spray nozzle.

[0002]

2. Description of the Related Art A conventional water spray gun is provided with a switching lever. By operating this switching lever, the water discharge pattern is changed, resulting in straight or rod-shaped water discharge or spray or spray water discharge.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
There are the following problems. (1) The amount of water required to extinguish a fire decreases as the fire weakens and the fire goes down. However, in the conventional water discharge gun, since the flow rate is always constant, for example, 200 L / min., In the state where the fire is approaching, excessive water is discharged and water loss occurs. (2) When extinguishing a fire, a fireman may be exposed to the radiant heat of the fire source and may be burned.

In view of the above circumstances, the present invention aims to prevent the occurrence of water loss. Another purpose is to prevent the operator of the water gun from being exposed to the radiant heat of the fire source.

[0005]

Means for solving the above-mentioned problems are as follows.

According to the present invention, a barrel having a switching valve receiver at one end and a gun barrel at the other end; a large-capacity nozzle provided at the tip of the switching valve receiver; a communication hole provided in the switching valve receiver. A valve body accommodating recess provided in the switching valve receiver; a through hole formed in the recess;
A flange ring portion of a branch pipe that is rotatably fitted to the switching valve receiver and covers the communication hole; and a branch that is connected to the flange ring portion and that communicates with the communication hole by rotation of the flange ring portion. A pipe portion of a pipe; a valve body mounted in the recess and crimped to the flange ring portion; a handle provided on the flange ring portion of the branch pipe; and a small-capacity spray nozzle provided at the tip of the pipe portion. Is provided.

According to the present invention, a barrel having a switching valve receiver at one end and a gun barrel at the other end; a large-capacity nozzle provided at the tip of the switching valve receiver; a communication hole provided in the switching valve receiver. A valve body accommodating recess provided in the switching valve receiver; a through hole formed in the recess;
A flange ring portion of a branch pipe that is rotatably fitted to the switching valve receiver and covers the communication hole; and a branch that is connected to the flange ring portion and that communicates with the communication hole by rotation of the flange ring portion. A pipe portion of a pipe; a valve body that is mounted in the recess and presses against the flange ring portion; a lock shoe that covers the flange ring portion of the branch pipe; and a screw shoe that is screwed into the flange ring portion. And a small capacity spray nozzle provided at the tip of the pipe portion of the branch pipe.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A water discharge gun equipped with a large capacity nozzle is provided with a small capacity spray nozzle via a switching valve means. When water is supplied to the small-capacity spray nozzle by the operation of the switching valve means, the spray water is discharged in a smaller amount than the large-capacity nozzle.

As the switching valve means, for example, a switching valve receiver having a communication hole, a valve body accommodating recess provided in the switching valve receiver, a through hole formed in the recess, and a valve body mounted in the recess. When,
A flange ring portion of a branch pipe that is rotatably fitted in the switching valve receiver and covers the communication hole, and the branch that is connected to the flange ring portion and that communicates with the communication hole by rotation of the flange ring portion. A switching valve consisting of the pipe section of the pipe is used. With this switching valve, the valve can be easily opened and closed by rotating the branch pipe by a predetermined angle while holding the water gun.

A first embodiment of the present invention will be described with reference to FIGS. A barrel 3 is screwed to one end of the barrel 1, a switching valve receiver 5 is screwed to the other end, and a large-capacity nozzle, for example, a variable spray nozzle of 200 L / mim. 8 is screwed on. The barrel 1, the barrel 3, and the switching valve support 5
Are each formed in a cylindrical shape.

A switching lever 10 supported by a pin 9 is provided on the horizontal portion 3a of the gun barrel 3.
The rotation of 0 causes the spring shaft 11 to slide.

On the flange ring contact surface 12 of the switching valve receiver 5,
A valve body storage recess 13 is provided. The recess 13 is formed in a substantially rectangular shape, and a through hole 14 is formed in the center thereof. The shape, size, etc. of the recess 13 and the through hole 14 are appropriately selected as necessary. O-ring grooves 15 are formed on both sides of the recess 13, and O-rings 16 are attached to the grooves 15.

A communication hole 18 is provided in the contact surface 12, and a center line 18c of the communication hole 18 has a through hole 1
The angle .theta. = 60.degree. With respect to the center line 14c of FIG. The size and the angle θ of the communication hole 18 are appropriately selected as needed.

A valve body 20 is mounted in the recess 13, and the valve body 20 is formed in a rectangular shape from synthetic resin such as Bakelite. The shape and material of the valve body 20 are appropriately selected as needed.

A front surface side 20a of the valve body 20 is formed in a circular arc projection shape, and a rear surface side 20b thereof is a circular arc concave central portion 20.
c and horizontal portions 20d on both sides thereof. The surface side 20a is formed with the same radius of curvature as the outer circumference of the switching valve receiver 5, and the central portion 20c is formed concentrically with the surface side 20a.

A branch pipe 22 is rotatably supported by the switching valve receiver 5. The branch pipe 22 is provided with a flange ring portion 22a that is in pressure contact with the corresponding contact surface 12 of the switching valve receiver 5, and a pipe portion 22b of the branch pipe 22 that is continuous with the flange ring portion 22a.

The flange ring portion 22a is in pressure contact with the flange ring contact surface 12 of the switching valve receiver 5, presses the O-ring 16 and the valve body 20, and closes the communication hole 18.

A bolt fixing portion 23 is provided below the flange ring portion 22a, and a handle fixing bolt 25 is fixed to the bolt fixing portion 23. This bolt 25
The lock shoe 24 having a U-shaped cross section penetrates through a screw hole, and a handle 26 is screwed into the screw portion. The lock shoe 24 is tightened by the rotation of the handle 26,
The lower surfaces of the leg portions 24a and 24b are pressed against the switching valve receiver 5 and the large capacity nozzle 8, so that the flange ring portion 22b is fixed.

A small capacity spray nozzle 30 is screwed onto the tip of the pipe portion 22b of the branch pipe 22. This nozzle 30
The capacity is smaller than the large capacity nozzle 8, for example, 60L / mi
Although the small capacity spray nozzle 30 of n. is used, the spray structure, type, size, etc. of this nozzle 30 are appropriately selected as necessary. The tip 30a of the nozzle 30 is located on the same vertical line V as the tip 8a of the large capacity nozzle 8.

At the tip of the spring shaft 11, the valve body 3
1 is provided, but this valve body 31 has a spring shaft 1
It slides away from and contacts the valve support 32. A valve body fitting 33 is screwed to the tip of the spring shaft 11, and the fitting 33 is supported by a gun bearing 34.

The needle 3 is attached to the tip of the valve body fitting 33.
The needle 35 penetrates through the orifice 36 and is in contact with the valve seat of the spider 37. The needle 35 is also brought into contact with or separated from the valve seat by sliding of the spring shaft 11 similarly to the valve body 31. By the sliding of the needle 35, the water discharge pattern of the large-capacity nozzle 8 is changed, and the water is discharged in a rod shape (straight) or sprayed water (spray).

Reference numeral 40 denotes a switching guide for rotatably connecting the large-capacity nozzle 8 and the small-capacity spray nozzle 30, 41 is a cap bolt, 42 is a shoulder strap, and 44 is a stopper which is locked by a stopper receiving fitting 45. , 46 is a guide block, 47 is a cap nut screwed to the spring shaft 11,
Are shown respectively.

Next, the operation of this embodiment will be described. First, the operation of the large capacity nozzle will be described. Stick-shaped water discharge: In the event of a fire, a fireman carries a water gun on his back band 4
Hold 2 with your shoulder, hold the gun barrel 3 with your right hand, hold the handle 26 with your left hand, and hold the water gun toward the fire source. Switching lever 10
Is brought to the state of the dashed line 10A, the spring shaft 11 slides in the direction of arrow A11, the valve body 31 separates from the valve seat 32, and the needle 35 separates from the valve seat. for that reason,
Fire extinguishing water W supplied from a hose (not shown)
The large capacity nozzle 8 is reached through the barrel 1 and the rod-shaped water discharge is started from the nozzle 8. When the switching lever 10 is locked, the rod-shaped water discharge state is maintained.

Spray water discharge: When the switching lever 10 is unlocked and the switching lever 10 is moved toward the origin position, the spring shaft 11 slides in the direction opposite to the arrow A11. Then, as the opening degree of the valve element 31 becomes smaller and the needle 35 approaches the valve seat, the spray water is started through the spider 37 while the fire extinguishing water W is dispersed.

Small-capacity spray nozzle: When the large-volume nozzle 8 is supplied with the fire-extinguishing water W, the fire-extinguishing water W enters the through hole 14 and pushes up the valve body 20. Therefore, the valve body 20 made of synthetic resin is pressed against the flange ring portion 22a and comes into close contact therewith, so that the sealing property is good. Since the central portion 20c on the back surface side 20b of the valve body 20 has an arcuate concave shape, water pressure is reliably applied to this arcuate concave portion, so that the sealing property is further improved. An O-ring 16 seals between the flange ring portion 22a and the switching valve receiver 5.

At this time, the communication hole 18 is formed by the flange ring portion 22.
Since it is closed by a, the branch pipe 22 is not supplied with water.

After loosening the lock shoe 24 by rotating the handle 26 in a loosening direction and then turning it by a predetermined rotation angle, for example, 60 ° along the outer peripheral direction of the switching valve receiver 5, the pipes of the communication hole 18 and the branch pipe 22 are rotated. It communicates with the portion 22a.

Then, the fire extinguishing water W is supplied to the small-capacity spray nozzle 30 to start spraying water. In this state, the handle 26 is rotated in the direction opposite to the above to rotate the lock shoe 24.
Tighten and fix. This spray of water spreads the fog in front of the fireman, forming a so-called fog curtain.
Therefore, since the radiant heat from the fire source is blocked by this fog curtain, the firefighter does not receive the radiant heat.

As described above, the small-capacity spray nozzle 30 can be used when water is supplied to the barrel 1, so that the small-capacity spray nozzle 30 can be used simultaneously with the large-capacity nozzle 8. It is also possible to use only one alone.

A second embodiment of the present invention will be described with reference to FIG. 7. The difference between this embodiment and the first embodiment is that the switching valve receiver 5 is provided with a plurality of communication holes 18, 48. It is that you are. The positions of the communication holes 18 and 48 are appropriately selected according to need. For example, the communication holes 18 and 48 are formed symmetrically with respect to the center line 14c of the through hole 14.

When the communication holes 18 and 48 are provided symmetrically in this way, the fireman can open and close the valve by rotating the branch pipe in a direction that facilitates turning while holding the handle, thus improving operability. be able to.

The embodiment of the present invention is not limited to the above. For example, instead of rotating the branch pipe to open and close the valve, the handle is slid to slide the branch pipe in the axial direction. The valve may be opened and closed.

[0033]

Since the present invention is constructed as described above, the fire extinguishing water can be sprayed only from the small capacity spray nozzle. Therefore, unlike the conventional example, the occurrence of water loss can be prevented.

Further, water can be discharged simultaneously from the large capacity nozzle and the small capacity spray nozzle. Therefore, since the fog curtain can be formed in front of the firefighter while extinguishing the fire, the firefighter does not receive radiant heat from the fire source.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line II-III of FIG.

FIG. 3 is an enlarged plan view of a switching valve receiver.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is an enlarged plan view of a valve body.

FIG. 6 is a front view of a valve body.

FIG. 7 is a cross-sectional view showing a second embodiment of the present invention and is a view corresponding to FIG.

[Explanation of symbols]

1 barrel 3 gun 5 Switch valve receiver 8 large capacity nozzle 10 Switching bar 13 Valve body recess 14 through holes 18 communication holes 20 valve body 22 Branch pipe 22a Flange ring part of branch pipe 22b Branch pipe section 26 Handle 30 small capacity spray nozzle

Claims (7)

(57) [Claims] Claims: 1. A barrel having a switching valve support at one end and a barrel at the other end; a large-capacity nozzle provided at the tip of the switching valve support; a communication hole provided at the switching valve support; A valve body accommodating recess provided in the switching valve receiver; a through hole formed in the recess; a flange ring portion of a branch pipe rotatably fitted in the switching valve receiver and covering the communication hole; A pipe part of the branch pipe connected to the ring part and communicating with the communication hole by rotation of the flange ring part; a valve body mounted in the recess and press-contacted to the flange ring part; A twin water spray gun comprising: a handle provided on the flange ring portion; and a small-capacity spray nozzle provided at the tip of the pipe portion. 2. A barrel having a switching valve support provided at one end and a barrel provided at the other end; a large-capacity nozzle provided at the tip of the switching valve support; a communication hole provided at the switching valve support; A valve body accommodating recess provided in the switching valve receiver; a through hole formed in the recess; a flange ring portion of a branch pipe rotatably fitted in the switching valve receiver and covering the communication hole; A pipe part of the branch pipe connected to the ring part and communicating with the communication hole by rotation of the flange ring part; a valve body mounted in the recess and press-contacted to the flange ring part; A lock shoe that covers the flange ring portion; a handle that is screwed to the flange ring portion and tightens the lock shoe; and a small-capacity spray nozzle provided at the tip of the pipe portion of the branch pipe. A double water spray gun featuring. 3. The valve body according to claim 1, wherein the front surface side is formed in an arc shape, and the back surface side is formed in a circular arc concave shape at the center and both sides are formed horizontally. Double water spray gun as described. 4. The lock shoe has a U-shaped cross section,
The twin water spray gun according to claim 3, wherein a screw hole is formed in a central portion thereof. 5. A handle fixing screw passing through a screw hole of a lock shoe is fixed to the flange ring portion, and a handle for tightening the lock shoe is screwed to the screw. Reciprocating water gun. 6. The dual water spray gun according to claim 1, wherein the switching valve support has a plurality of communication holes. 7. The double nozzle according to claim 1, wherein the large-capacity nozzle is a variable spray nozzle capable of switching between a rod-shaped water discharge and a spray-shaped water discharge. Type water gun.