JP2002369892A - Fire extinguishing nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire extinguishing nozzle of which water discharge amount can be reliably adjusted to a desired level without requiring skill. SOLUTION: The fire extinguishing nozzle is provided with an inner cylindrical body 1 for which a fire extinguishing hose 40 is connected to a base end, water is passed inside and a valve part 3 is provided on a tip and an outer cylindrical body 2 externally fitted to the inner cylindrical body 1 to be freely screwed back and forth. By screwing the outer cylindrical body 2 from the tip of the inner cylindrical body 1 to the base end, from the closed state of abutting the valve part 3 to the inner peripheral surface of the outer cylindrical body 2 and putting a lid on, the valve part 3 is separated from the inner peripheral surface of the outer cylindrical body 2 and the water discharge amount increases. A projection part 10 for resistance is provided on the inner peripheral surface of the outer cylindrical body 2 and an O ring 5 for the resistance is fitted to the outer peripheral surface of the inner cylindrical body 1. A display part 11 indicating a prescribed water discharge amount by a measure is provided in the outer cylindrical body 1 and a mark part 12 for positioning is provided on the inner cylindrical body 1. Corresponding to the matching of the measure of the display part 11 and the mark part 12, the projection part 10 and the O ring 5 are brought into contact with each other and the rotation resistance of the outer cylindrical body 2 increases.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a fire extinguishing nozzle.

[0002]

2. Description of the Related Art A conventional fire-extinguishing nozzle is connected to a fire-extinguishing hose at a base end thereof and is provided with an inner cylinder body having a valve at a tip end thereof, and is externally fitted to the inner cylinder body so as to be capable of reciprocating. And an outer cylinder.

[0003] Then, by screwing the outer cylinder from the distal end to the proximal end of the inner cylinder, the valve portion of the inner cylinder comes into contact with the inner peripheral surface of the outer cylinder to close the inner cylinder from the closed state. The valve portion of the cylindrical body is separated from the inner peripheral surface of the outer cylindrical body so that the amount of water discharged is increased.

[0004]

However, in the conventional fire extinguishing nozzle, the adjustment of the predetermined amount of water discharge is performed based on the amount of scale and the empirical feeling. Therefore, skill is required, and inexperienced persons discharge water. If this is done, the amount of water discharged will be excessive, and there is a risk that the fire site will be flooded.

[0005] Therefore, an object of the present invention is to provide a fire extinguishing nozzle capable of surely adjusting a desired water discharge amount without skill.

[0006]

In order to achieve the above object, a fire extinguishing nozzle according to the present invention has a fire extinguishing hose connected to a base end thereof, which is provided with an inner cylinder having a valve portion at a tip end and having water flow therein. Body, and an outer cylinder body which is fitted to the inner cylinder body so as to be able to advance and retreat freely, and by screwing the outer cylinder body from the distal end to the proximal end of the inner cylinder body, the valve portion is In a fire extinguishing nozzle configured such that the valve portion is separated from the inner peripheral surface of the outer cylinder body to increase the amount of water discharged from a closed state in which the lid is brought into contact with the inner peripheral surface of the outer cylinder body, A resistance projection is provided on the inner peripheral surface of the outer cylinder, a resistance O-ring is fitted on the outer peripheral surface of the inner cylinder, and a predetermined O-ring is attached to one of the outer cylinder and the inner cylinder. A display section indicating the amount of water discharged is provided on a scale, and an alignment mark section is provided on the other side, and the protrusion is provided in correspondence with the scale of the display section and the mark section. The and the O-ring is in contact, which is constituted so that the rotation resistance of the outer cylindrical body is increased.
It is also preferable that a plurality of protrusions are provided in parallel in the axial direction.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.

As shown in FIG. 1, a fire extinguishing nozzle N according to the present invention has an inner tubular body 1 having a base connected to a fire extinguishing hose 40 to allow water to flow therethrough and having a valve portion 3 at a distal end. Cylinder 1
And an outer cylindrical body 2 which is externally fitted so as to be able to advance and retreat.

Then, by screwing the outer cylinder 2 from the distal end to the proximal end of the inner cylinder 1, the valve portion 3 of the inner cylinder 1 is brought into contact with the inner peripheral surface of the outer cylinder 2 to cover the outer cylinder 2. From the closed state, the valve portion 3 of the inner cylinder 1 is separated from the inner peripheral surface of the outer cylinder 2 to increase the water discharge amount.

The inner cylinder 1 has an outer flange 1a at its base end into which a fire hose 40 is inserted, and a resistance O-ring 5 is fitted in a middle part of the outer peripheral surface of the inner cylinder 1, A sealing member 6 for sealing between the outer cylinder 2 and the outer cylinder 2 is fitted to the tip of the outer peripheral surface of the cylindrical body 1, and a screw portion 7 is provided on the outer peripheral surface between the O-ring 5 and the sealing material 6. Have been.

The outer cylinder 2 includes a cylinder main body 2a and a cover member 2b made of an elastic material such as rubber for covering the cylinder main body 2a.
A plurality of (three in the present embodiment) resistance protrusions (protrusions) 10 are provided on the inner peripheral surface on the base end side of the cylinder main body 2a in the axial center L direction. A screw portion 8 that is screwed with the screw portion 7 of the inner cylindrical body 1 is provided in a middle portion of the inner circumferential surface of the cylindrical main body 2a, and an inner flange-shaped valve is provided near the tip of the inner circumferential surface of the cylindrical main body 2a. A seat 9 is provided.

The valve portion 3 has an umbrella shape composed of a cap portion 3a and a handle portion 3b, and is provided at a tip end of a spoke portion 4 extending in the (inner) radial direction on an inner surface of a distal end opening of the inner cylindrical body 1. The base end side of the handle 3b is provided continuously. That is, the valve portion 3 is disposed so as to protrude toward the distal end of the inner cylinder 1 and is coaxial with the axis L of the inner cylinder 1 (the main nozzle N).

The cap portion 3a of the valve portion 3 is provided with a valve seat portion 9 of the outer cylinder 2.
And the outer cylindrical body 2 is positioned at the (most) distal side of the inner cylindrical body 1 so that the cap portion 3a of the valve portion 3 comes into contact with the valve seat 9 of the outer cylindrical body 2. As a result, the water can be stopped from flowing inside the inner cylinder 1 and the outer cylinder 2 in the direction of arrow A. Then, the outer cylinder 2 is replaced with the inner cylinder 1
By screwing from the distal end to the proximal end, the cap portion 3a of the valve portion 3
Is separated from the valve seat 9 of the outer cylinder 2 and the amount of water discharged gradually increases.

The cover member 2b of the outer cylinder 2 is provided (attached) with a (tape-shaped) display section 11 indicating a predetermined amount of water discharge on a scale, and is attached to the outer flange 1a of the inner cylinder 1. Is provided with a positioning mark 12 (engraved or affixed), and the outer cylinder 2
Is rotated so that the predetermined amount of water is discharged from the nozzle N when the mark 12 is matched (positioned) with a predetermined scale of the display unit 11. In addition, the length of the display unit 11 and the interval between the scales of the display unit 11 are shown smaller than the actual size for easy understanding.

The scale of the display unit 11 is "SHUT" meaning stop of water discharge, "18φ" meaning discharge amount equivalent to a solid water column of 18 mm in diameter, and "SHUT" meaning discharge amount equivalent to a solid water column of 20 mm in diameter. “20φ”, “23φ” meaning discharge amount equivalent to a solid water column of 23 mm in diameter, “FO” meaning radial (mist-like) water discharge
G ".

The resistance projection 10 (of the outer cylinder 2) and the inner cylinder 1 (corresponding to the matching of the scale of the display 11 and the mark 12).
2) is set so as to contact the resistance O-ring 5 and increase the rotational resistance of the outer cylinder 2.

More specifically, the most proximal projection 10a of the outer cylinder 2 corresponds to the scale "18φ", and the scale "18φ".
When the mark is aligned with the mark 12, the protrusion 10a presses the O-ring 5 (the O-ring 5 is elastically deformed), and the rotational resistance of the outer cylinder 2 is increased. Similarly, the most protruding portion 10c of the outer cylindrical body 2 corresponds to the scale “23φ”,
The intermediate projection 10b between the projection 10a and the projection 10c is the scale "20φ"
And corresponding.

Next, the operation and function of the nozzle N will be described. First, when discharging the water discharge amount of the scale “18φ” of the display unit 11, as shown in FIG. 2A, the outer cylinder 2 is positioned at the (most) tip side of the inner cylinder 1, and the valve is opened. Outer cylinder 2 at part 3
The water discharge stopped state with the inner peripheral surface covered {the scale “SHUT” of the display unit 11 and the marked part 12 match}, so that the outer cylinder 2 is moved in the direction of arrow B around the axis L. By rotating, the outer cylinder 2 is screwed in the direction of arrow C (the base end side of the inner cylinder 1), and the valve portion 3 is opened to start water discharge, as shown in FIG. Thus, the scale "18φ" of the display unit 11 and the mark unit 12 (substantially) coincide with each other, and the protruding portion 10a presses the O-ring 5 against the scale.
Change the rotation resistance (increase the rotation resistance).
At this time, the water discharge amount indicated by the scale “18φ” on the display unit 11 has been discharged.

Next, when the water discharge amount of the scale "20φ" of the display unit 11 is discharged, the outer cylinder 2 is further rotated in the direction of arrow B from the state shown in FIG. When the water discharge amount is increased by screwing into the O, the protruding portion 10a gets over the O-ring 5 and the rotational resistance of the outer cylindrical body 2 is reduced again. The mark 12 coincides (substantially) and the protrusion 10b presses the O-ring 5,
The rotation resistance of the outer cylinder 2 increases, and the water discharge amount of “20φ” is discharged.

Next, when discharging the water discharge amount of the scale “23φ” of the display unit 11, the scale “20” of the display unit 11 (described above) is used.
φ ”and the mark 12 are matched, and then the outer cylinder 2
Is rotated in the direction of the arrow B and screwed in the direction of the arrow C to increase the amount of water discharge, the protrusion 10b rides over the O-ring 5, and the rotational resistance of the outer cylinder 2 is reduced again. As shown in FIG. 3A, the scale "23"
φ ”and the mark portion 12 (approximately) coincide with each other, and the protruding portion 10c presses the O-ring 5 to increase the rotational resistance of the outer cylinder 2,
A water discharge amount of “23φ” is discharged.

Next, when radial (mist) water is to be discharged, the outer cylinder 2 is further rotated in the direction of arrow B from the state shown in FIG. When the valve portion 3 is made to protrude from the tip of the outer cylinder 2, the projection 10c rides over the O-ring 5, and the rotational resistance of the outer cylinder 2 is reduced again. Then, as shown in FIG. As shown, when the scale “FOG” of the display unit 11 is (substantially) matched with the mark unit 12,
Water is sprayed in mist. Further, the outer cylinder 2 can be rotated in the direction of arrow B and screwed in the direction of arrow C to increase the (fog-like) water discharge amount.

The inner peripheral surface of the outer cylinder 2 has a stepped portion 13 (projecting portion).
10) is formed, and the stepped portion 13 and the O-ring 5 are brought into contact with each other in accordance with the coincidence between the scale "FOG" and the mark portion 12, and the outer cylinder 2 is formed.
May be configured to increase the rotation resistance.

Although not shown, a display unit is provided on the inner cylinder 1.
11 may be provided, and the outer cylinder 2 may be provided with a marking 12. In addition, the number of the protrusions 10 may be one. In short, the number of the protrusions 10 may be the same as the number of scales (water discharge amount) of the display unit 11.

The present invention is not limited to the above-described embodiment. For example, the shape of the projection 10 may be a (annular) ridge,
The shape of the valve portion 3 and the method of displaying the amount of water discharged from the scale of the display portion 11 can be freely set in various shapes such as a (independent) projection portion or a stepped portion. The design can be changed without departing from the scope.

[0025]

Since the present invention is configured as described above, the following effects can be obtained.

According to the first aspect, the projection 10 and the O-ring 5 are brought into contact with each other in accordance with the coincidence between the scale of the display section 11 and the mark section 12, and the rotational resistance of the outer cylinder 2 is increased. With such a configuration, it is possible to accurately and quickly adjust the water amount to a desired amount without any skill, and it is possible to prevent the fire spot from being flooded due to excessive water discharge. In addition, since the adjustment of the desired amount of water can be determined not only visually but also by the tactile sensation of the hand, it can be used even in a dark place and can be used in various fire scenes.

(According to claim 2) the projection 10 is provided with an axis L
Since a plurality of scales (water discharge amounts) are provided in parallel in the direction, the same number of scales (water discharge amount) as the number of the protrusions 10 can be set, and the range of application is wide.

[Brief description of the drawings]

FIG. 1 is a sectional side view showing an embodiment of the present invention.

FIG. 2 is an operation explanatory view of the present invention.

FIG. 3 is an operation explanatory view of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner cylinder 2 Outer cylinder 3 Valve part 5 (For resistance) O-ring 10 (For resistance) Projection 11 Display part 12 (For alignment) Mark part 40 Fire hose L Shaft center

Claims (2)

[Claims] 1. An inner cylinder 1 having a fire hose 40 connected to a base end and having water flowing therein and having a valve portion 3 at a distal end, and an outer fitting which is externally fitted to the inner cylinder 1 so as to be capable of being advanced and retracted. The valve 3 is brought into contact with the inner peripheral surface of the outer cylindrical body 2 by screwing the outer cylindrical body 2 from the distal end of the inner cylindrical body 1 to the base end. In a fire-extinguishing nozzle configured such that the valve portion 3 is separated from the inner peripheral surface of the outer cylinder 2 from the closed state to increase the amount of water discharged, the valve portion 3 is disposed on the inner peripheral surface of the outer cylinder 2. A resistance protruding portion 10 is provided, an O-ring 5 for resistance is fitted on the outer peripheral surface of the inner cylinder 1, and a predetermined water discharge amount is graduated on one of the outer cylinder 2 and the inner cylinder 1. Is provided, and a positioning mark 12 is provided on the other side, and the protrusion 10 and the O-ring 5 are provided in correspondence with the scale of the display 11 and the matching of the mark 12. Is in contact with Extinguishing nozzle, characterized in that the rotational resistance of the outer cylinder 2 is configured to be larger. 2. The fire extinguishing nozzle according to claim 1, wherein a plurality of protrusions are provided in parallel in the direction of the axis L.