JP7541901B2 - Self-propelled fire extinguishing device - Google Patents

Description

The present invention relates to a self-propelled water cannon, and in particular to a self-propelled water cannon that has excellent attitude stability when spraying large amounts of water.

In the event of a building fire, firefighters may be unable to enter the building due to the generation of combustion gases and heat, as well as the risk of the building collapsing or falling down. However, because direct water spraying inside the building is effective for rescue and firefighting activities, self-propelled fire extinguishing devices have been considered and various proposals have been made (see, for example, Patent Documents 1 to 3).

Self-propelled fire extinguishing devices used inside buildings need to be small because large devices have difficulty entering buildings. However, with small devices, when water discharge begins after entering a building, the reaction force can cause the device to lose its position and tip over or the nozzle to move wildly, making it impossible to increase the water discharge pressure and not always allowing for sufficient water discharge distance. Also, simply reducing the size of conventional large fire extinguishing devices makes it difficult to control the reaction force when discharging water and perform accurate firefighting activities.

There was therefore a need to develop a self-propelled water cannon that was small, self-propelled, and capable of spraying large amounts of water at high pressure, while also having excellent attitude stability when spraying water.

Patent No. 3995289 JP 2003-310780 A JP 2003-320052 A

The object of the present invention is to provide a small, self-propelled water cannon that is capable of discharging large amounts of water under high pressure and has excellent attitude stability when discharging water.

The self-propelled fire extinguishing device for achieving the object of the present invention is a self-propelled fire extinguishing device having a traveling means and a water discharge device mounted on the traveling means ,
The water discharge device has a hose connection part to which a fire hose is detachably attached and a nozzle for discharging fire water supplied through the fire hose ,
The water discharge angle from the nozzle can be rotated up and down around the nozzle rotation point,
The hose connection portion is provided so as to rotate up and down around a connection rotation point,
The rotation range of the hose connecting portion with respect to a base axis connecting the nozzle rotation point and the connecting rotation point is 5° to 45° downward.
In this specification, "self-propelled water cannon" shall be read as "self-propelled fire extinguishing device", "water cannon" shall be read as "water cannon device", and "connection part" shall be read as "hose connection part".

The self-propelled water cannon of the present invention is a small self-propelled water cannon capable of entering buildings, etc., yet capable of discharging large amounts of water under high pressure and has excellent attitude stability.

The center of gravity of the water cannon can be positioned further toward the water discharge direction than the center of gravity of the traveling means, making the posture when discharging water more stable. In addition, it is preferable that the water cannon is a small device with a width of 60 cm or less.

The water cannon may be configured so that the water discharge angle can be changed in a range of 5° to 45° upward from the base axis. Also, the water discharge direction from the nozzle may be changed in a range of 0° to 30° left and right from the base axis.

FIG. 1 is a schematic diagram illustrating an embodiment of a self-propelled water cannon of the present invention. 2(1) and (2) are schematic diagrams illustrating a water cannon constituting an embodiment of the self-propelled water cannon of the present invention, where (1) is a plan view and (2) is a front view.

The self-propelled water cannon of the present invention will be described in more detail below with reference to the drawings (Figs. 1 and 2).

The self-propelled water cannon 1 has at least a water cannon 2 and a traveling means 3. The water cannon 2 has a nozzle 4 and a connecting part 5 that connects to a fire hose (not shown). The nozzle 4 has a water discharge pressure of 0.4 MPa or more, and can effectively extinguish a fire inside a building. The water discharge pressure is preferably 0.5 MPa or more, more preferably 0.6 MPa or more. The water discharge pressure is preferably 1.2 MPa or less, more preferably 1.0 MPa or less. In the past, when such a high water discharge pressure was applied to a water cannon, the nozzle would move wildly due to a large recoil force, making it difficult to discharge water on the target, or the self-propelled water cannon would lose its posture and roll over. The above problem was particularly noticeable in small self-propelled water cannons used to penetrate inside buildings, etc. The self-propelled water cannon of the present invention overcomes the above-mentioned problems and, although it is a small self-propelled water cannon, is capable of discharging a large amount of water under high pressure and can obtain excellent posture stability.

In this specification, the water cannon 2 can change its water discharge angle α in the vertical direction around the nozzle pivot point 6, and can change the axial direction 12 of the connecting part 5 in the vertical direction around the connecting pivot point 7. The straight line connecting the nozzle pivot point 6 and the connecting pivot point 7 is the base axis 8 of the water cannon 2.

The water cannon 2 has a connecting rotation mechanism that changes the axial direction 12 of the connecting part 5 up and down around the connecting rotation point 7, and when the angle of the axial direction 12 of the connecting part 5 with respect to the base axis 8 is θ, the angle θ can be changed in the range of 5° to 45° downward of the base axis 8. By adjusting the angle θ in the range of 5° to 45° downward of the base axis 8, the posture of the self-propelled water cannon can be stabilized against the recoil force when discharging water. The angle θ of the connecting part 5 is preferably in the range of 5° to 20°, more preferably in the range of 10° to 15°.

The connecting rotation mechanism is not particularly limited, and may be a normal rotation mechanism that can change the axial direction 12 of the connecting part 5 up and down around the connecting rotation point 7.

The water cannon 2 has a nozzle rotation mechanism that changes the water discharge angle α up and down around the nozzle rotation point 6, and the water discharge angle α can be changed upward with respect to the base axis 8, preferably in the range of 5° to 45°. The water discharge angle α is the angle of the water discharge direction 11 from the nozzle 4 with respect to the base axis 8. By changing the water discharge angle α upward with respect to the base axis 8, preferably in the range of 5° to 45°, firefighting activities can be carried out effectively. The smaller the water discharge angle α, the greater the recoil force that the water cannon receives when discharging water, but the effect of the recoil force can be reduced by setting the angle θ of the connecting part 5 described above in a specified range. The water discharge angle α is more preferably in the range of 15° to 45°, and even more preferably in the range of 20° to 30°.

The nozzle rotation mechanism is not particularly limited, and can be any ordinary nozzle rotation mechanism that can change the water discharge angle α up and down around the nozzle rotation point 6.

In addition, when the water discharge direction 11 from the nozzle 4 is angled left-right with respect to the base axis by β, the water cannon 2 can change the angle β preferably within the range of 0° to 30°. By changing the angle β to the left-right of the base axis 8, preferably within the range of 0° to 30°, firefighting activities can be carried out effectively. The angle β is more preferably in the range of 0° to 20°, and even more preferably in the range of 0° to 10°.

The self-propelled water cannon 1 is preferably arranged so that the center of gravity of the water cannon 2 is located on the water discharge direction side of the center of gravity of the traveling means 3. In other words, by locating the center of gravity of the water cannon 2 forward of the center of gravity of the traveling means 3, the self-propelled water cannon can be made to have excellent posture stability when discharging water. The center of gravity of the water cannon 2 and the center of gravity of the traveling means 3 can be determined by the usual method.

The self-propelled water cannon 1 preferably has a width of 60 cm or less, more preferably 30 cm to 60 cm, and even more preferably 40 cm to 50 cm. If the width is 60 cm or less, it can avoid obstacles inside the building and perform firefighting activities flexibly.

There are no particular limitations on the traveling means 3, so long as it is capable of remotely controlling reconnaissance and movement while equipped with the water cannon 2 and connected to a fire hose. It may be selected from commercially available products or may be manufactured specifically for the purpose.

Reference Signs List 1 Self-propelled water cannon 2 Water cannon 3 Traveling means 4 Nozzle 5 Connecting part 6 Nozzle pivot point 7 Connecting pivot point 8 Base axis 11 Water discharge direction 12 Axial direction θ of connecting part Axial angle α of connecting part Up-down water discharge angle β Left-right water discharge angle

Claims (5)

A self-propelled fire extinguishing device having a traveling means and a water discharge device mounted on the traveling means ,
The water discharge device has a hose connection part to which a fire hose is detachably attached and a nozzle for discharging fire water supplied through the fire hose ,
The water discharge angle from the nozzle can be rotated up and down around the nozzle rotation point,
The hose connection portion is provided so as to rotate up and down around a connection rotation point,
A self-propelled fire extinguisher , wherein the rotation range of the hose connection portion with respect to a base axis connecting the nozzle rotation point and the connection rotation point is 5° to 45° downward. 2. The self-propelled fire extinguisher according to claim 1, wherein the center of gravity of the water-discharging device is disposed on the water-discharging direction side of the center of gravity of the traveling means. 3. The self-propelled fire extinguisher according to claim 1 or 2, wherein the width of the self-propelled fire extinguisher is 60 cm or less. The self-propelled fire extinguisher according to any one of claims 1 to 3, wherein the water discharge angle can be changed in a range of 5° to 45° upward relative to the base axis. The self-propelled fire extinguisher according to any one of claims 1 to 4, wherein the direction of water discharge from the nozzle is changed in a range of 0° to 30° to the left and right with respect to the base axis.

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