JP2619690B2 - Structure of fire hydrant nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to the structure of a fire hydrant nozzle applied to, for example, a fire hydrant stored in a storage box installed indoors.

[Conventional technology]

Generally, a fire hydrant includes a connection port to a pipe, an on-off valve, a fire hose, a fire hose connecting fitting, a hose storage device, a nozzle, a starter of a pressurized water supply device, an indicator light, and the like. The fire hydrant includes a hose reel type in which a fire hose is wound up and stored in a hose storage device having a cylindrical shape or the like, and a folding type storage device in which a fire hose is stored in a hose storage device by a method other than the hose reel type. .

Fire hydrants also have various restrictions that must be met by law. In the structure of the fire hydrant, it is necessary that the extension and storage operation of the fire hose and the maintenance and inspection thereof can be easily performed, and that the fire hose be durable and have no abnormal function due to dust, moisture and the like.

In addition, the fire hose can be pulled out in any direction within a range of 90 degrees to the left and right in front of the mounting surface of the fire hydrant, etc. In addition, the fitting of the fire hose is a plug-in type used for the fire hose And the ministerial ordinance stipulating the technical specifications for screw-type fittings used in fire-fighting hoses or fire hoses. Those having a sliding portion or a rotating portion in a water channel portion must be made of a corrosion-resistant material and have a structure that is not affected by sliding or rotation.

Conventionally, a fire hydrant stored in a folding or other storage type indoor fire extinguisher storage box stored in a hose storage device has a hose rack fixed in the storage box, and a large number of hose hooks are attached to the hose rack, and Attach an open / close valve to the connection port to the provided pipe, connect one end of a fire hose to the open / close valve, connect a nozzle to the other end, fold the fire hose, and turn the bent part of the hose into a hose hook. The fire hose was housed in a storage box.

In addition, the fire hydrant stored in a hose reel type indoor fire hydrant storage box that winds and stores the fire hose in a hose storage device has a support arm attached to the storage box, and the hose arm is rotatably supported by the support arm. Is suspended movably. Further, the fire hydrant has an opening / closing valve attached to a connection port to a pipe provided in the storage box, one end of a fire hose is connected to the opening / closing valve, and a nozzle is connected to the other end, and the fire hose is connected to a hose reel. It is rolled up and stored.

[Problems to be solved by the invention]

By the way, the nozzle connected to the end of the fire hose is generally housed in a state of being hung on a nozzle holder provided in a storage box. In a digestive activity or a digestive training, it is usual to pull out a fire hose with a nozzle.

Therefore, when the fire hydrant operator operates the fire hydrant,
The following is desired for the nozzle. That is, when pulling out the fire hose with the nozzle attached to the tip of the fire hose, the fire hose can be pulled out smoothly, and the handle allows the hose to be twisted, etc., and goes to the target place. That the nozzle can be stably and easily operated even when the operator opens the opening / closing valve which is the main valve of water provided in the storage box with the nozzle, in winter. In addition, when the operator holds the nozzle in a cold area, there is a problem that the handle itself is not excessively cooled by water passing through the nozzle. In recent years, fire hydrants must be able to perform a series of operations such as opening and closing valves, extension of fire hoses from hose storage devices, and waterproofing, etc., by one person. The above conditions have become increasingly desirable.

An object of the present invention is to solve the above-mentioned problem, and it is highly desirable to connect the fire hydrant to a fire hose.
In order to be able to perform a series of operations such as extending the fire hose from the hose storage device and discharging water smoothly by one person,
Easy to grasp, even if the hose is twisted,
The structure of a fire hydrant nozzle that allows the twist by allowing relative rotation between the nozzle body and the hose when pulling out the hose, and makes it extremely easy to operate the extension and storage of the fire hose and to perform maintenance and inspection. It is to provide.

[Means for solving the problem]

The present invention is configured as follows to achieve the above object. That is, the present invention provides a fire hose connectable to a fire hydrant, a fire hose coupling fitting attached to an end of the fire hose, and a swivel pipe joint having one end pivotally attached to the fire hose coupling fitting. ,
A nozzle body having a water discharge port at one end fixed to the other end of the swivel fitting, located between an end face of the hose fitting and an end face of the nozzle body, and incorporated in the swivel fitting; An open / close valve, a manual lever protruding outside the swivel fitting for opening and closing the open / close valve, and a handle attached to the nozzle body so as to cover an outer peripheral surface of the nozzle body. The present invention relates to a fire hydrant nozzle structure.

In the fire hydrant nozzle structure, the handle is formed of a tubular member extending in the longitudinal direction and made of a heat insulating material such as rubber.

Furthermore, in the structure of the fire hydrant nozzle, a heat insulating air layer is formed between the inner peripheral surface of the handle and the outer peripheral surface of the nozzle body.

In the structure of the digestion plug nozzle, a protrusion for preventing slippage is formed on the outer peripheral surface of the handle.

The nozzle body has a locking portion for locking a fire hydrant nozzle to a nozzle holder provided in a storage box of the fire hydrant.

[Operation] The structure of the fire hydrant nozzle according to the present invention is configured as described above, and operates as follows. That is, the structure of this fire hydrant nozzle, the other end of the nozzle body having a water discharge port at one end is connected to a fire hose coupling fitting via a swivel fitting, and an open / close valve is provided on the nozzle body. Furthermore, since the handle is attached to the outer peripheral surface of the nozzle main body, the arrangement itself is efficient, and the configuration can be made compact in terms of space. Since the swivel fitting is incorporated between the nozzle body and the fire hose,
A relative rotation can be made between the hose and the handle, and the torsion of the hose can be tolerated. In addition, since the open / close valve is located on the handle side, the open / close valve can be opened / closed by a manual lever, and can be opened / closed by an operator's will, and the fire hose has a twist or the like. Even if it does, the direction of the open / close valve does not change.

Further, since the handle is a cylindrical body made of a heat insulating material such as rubber and extending in the longitudinal direction, the temperature of water is not directly transmitted to the handle. In particular, a heat insulating air layer is formed between the inner peripheral surface of the handle and the outer peripheral surface of the nozzle body, so that the direct transmission of the temperature of water to the handle is more reliably prevented.

Further, since the anti-slip projection is formed on the outer peripheral surface of the handle, the operator can grasp the nozzle body reliably and stably.

In addition, since the nozzle main body is provided with a step for locking the hydrant nozzle to the nozzle holder provided in the storage box of the fire hydrant, it can be stably stored in the storage box.

〔Example〕

Hereinafter, an embodiment of the structure of a fire hydrant nozzle according to the present invention will be described with reference to the drawings. First, an embodiment of the structure of a fire hydrant nozzle according to the present invention will be schematically described with reference to FIG.

This fire hydrant nozzle 9 includes a nozzle body 61, a water discharge port 67 is formed at one end of the nozzle body 61, and the other end of the nozzle body 61 is connected to a fire hose fitting via a swivel fitting 62. Connected to 63. An open / close valve 64 is provided between the nozzle body 61 and the swivel pipe joint 62.

Regarding the connection between the nozzle main body 61 and the swivel pipe joint 62, the female screw at the end of the swivel pipe joint 62 was screwed into the male screw at the end of the nozzle main body 61 and fixed, and formed at the end of the nozzle main body 61. The end of the swivel pipe joint 62 abuts against the flange 75, and is firmly fixed to the two through a pin 74 so as to prevent relative rotation. In this case, a sealing material such as a packing is interposed between the nozzle body 61 and the swivel pipe joint 62 in order to prevent water leakage from between the two. The inner peripheral surface of the swivel fitting 62 has a protruding portion extending inward in the radial direction.
76 are formed.

An opening / closing valve is provided between the protrusion 76 and the end of the nozzle body 61.
64 are built in. The on-off valve 64 includes a valve seat 77 fixed to the inner wall surface of the swivel fitting 62 and the protruding portion 76, and a valve seat 78 fixed to the inner wall surface of the swivel fitting 62 and the end of the nozzle body 61. And a through hole 8 rotatable in the valve seats 77 and 78 and serving as a water passage in the center.
It has a ball valve 79 in which 0 is formed.

As shown in FIG. 5, the ball valve 79 has square holes 86 formed at both ends in the diameter direction.
Are fitted. These pins 81 penetrate through holes 85 formed in the swivel joint 62. The angular ends 88 of the pins 81 projecting outward from the swivel fitting 62 are fitted into notch grooves 82 formed at both ends of the U-shaped manual lever 65 (see FIG. 4). ). Further, a seal member 87 is interposed in order to prevent water from leaking between the swivel pipe joint 62 and the pin 81.

These can be easily assembled by removing the cover plate 83 attached to the swivel fitting 62.
Therefore, the state shown in FIG. 1 is a state in which the through-hole 91 serving as a water passage of the hose fitting 63, the through-hole 80 of the ball valve 79, and the through-hole 90 serving as a water passage of the nozzle body 61 communicate with each other. In the opening and closing operation of the opening and closing valve 64, as shown in FIG. 4, the ball valve 79 is rotated in the valve seats 77 and 78 by rotating or swinging the manual lever 65 in the direction of arrow A. As a result, the through hole 80 serving as a water passage formed in the ball valve 79 becomes a through hole of the hose fitting 63.
91 and the through-hole 90 of the nozzle main body 61 are cut off.

That is, the operator who operates the nozzle 9 can open and close the opening and closing valve 64 with the manual lever 65. In addition, the other end of the swivel fitting 62 has a hose connection fitting 63.
Of the hose connecting fitting 63 so that the end of the hose connecting fitting slidably abuts the projection 76, and furthermore, the contact plate 84 is fitted to the hose connecting fitting 63 so as to slidably contact the flange 93 at the end of the hose connecting fitting 63. Swivel fittings with bolts etc.
It is fixed to the end of 62. In order to prevent water from leaking between the swivel fitting 62 and the hose fitting 63, a sealing material 92 is interposed between them. Therefore, swivel fitting 62
And the hose coupling fitting 63 are slidable, so that relative rotation between them can be performed.

The nozzle body 61 is provided with a handle 66 which is a cylindrical body made of a heat insulating material such as rubber and extending in the longitudinal direction so as to cover the outer peripheral surface of the nozzle body 61. Handle 66 is the second
As shown in the figure, a plurality of non-slip projections 68 extending in the longitudinal direction are formed on the outer peripheral surface of the handle 66,
A plurality of longitudinally extending grooves 72 are formed on the inner peripheral surface. Therefore, when the handle 66 is fitted to the outer peripheral surface of the nozzle main body 61, a heat insulating air layer 69 is formed between the inner peripheral surface of the handle 66 and the outer peripheral surface of the nozzle main body 61. Further, on the outer peripheral surface of the nozzle main body 61, a locking portion having a step portion 70 for locking the nozzle main body 61 to a nozzle holder provided in the storage box of the fire hydrant, that is, a nozzle hooking portion 71 is formed.

The structure of the fire hydrant nozzle according to the present invention is preferably applied to, for example, a fire hydrant as shown in FIG. This fire hydrant is a hose reel type fire hydrant stored in the storage box 1 installed indoors. The storage box 1 is usually embedded and fixed in a wall of a building. Storage box 1
The upper part 2 is provided with a push button type transmitter 4, an indicator light 5 and an alarm bell 6, and the lower part 3 of the storage box 1 is provided with a hose reel 8 and a single-opening door 7. Have been.

The opening / closing door 7 can be configured so as to be openable in either the left or right direction according to the structure of the building. In the drawing, an opening / closing handle 13 is provided on the left side, and a pair of hinges on the right side are provided.
It can be opened and closed around 14. Hose reel 8
Is rotatably supported by a tilting rotation shaft 24 on a support 10 such that the diameter direction of the hose reel 8, that is, the side surface of the hose reel is parallel to the mounting wall surface of the storage box 1, and is housed in the storage box 1. .

The support 10 is rotatably mounted via fittings 18 fixed to left and right support frames 17 fixed to a machine frame 16 constituting the storage box 1, and is maintained in a forwardly inclined state. It is configured as follows. The fire hose 15 is configured to be extended when the support 10, that is, the hose reel 8 is tilted. One fitting 18 is hermetically sealed by a plug 23, and the other fitting 18 is connected to water pipes 21, 22 in which an open / close valve 20 is incorporated.

The opening / closing valve 20 can be configured to have the same structure as the opening / closing valve 64 incorporated in the fire hydrant nozzle. Also,
The open / close valve 20 is provided with a manual lever 11 for opening / closing the valve.The manual lever 11 for opening / closing the valve is turned on / off according to the opening / closing operation of the manual lever 11. A switch can be built into the switch.

A hose 15 is wound around the hose reel 8, and the hose 15
The digestion plug nozzle 9 is attached to the tip of the fifteen. The nozzle 9 is mounted on a nozzle holder 12 provided on a machine frame 16. In the storage box 1, the nozzle holder 12 may be arranged so as to be located on the left side close to the opening and closing side of the opening and closing door 7 when the opening and closing door 7 is opened to the left as shown by the dotted line in the figure. Preferably, therefore, the hose 15 is wound clockwise on the hose reel 8 in the figure.

Although not shown in FIG. 6, when the door is opened to the right, the position of the nozzle holder 12 'on which the nozzle 9' is placed is determined by the position of the door 7 as indicated by the two-dot chain line in FIG. It is preferable to arrange so as to be located on the right side close to the opening and closing side of
Accordingly, the hose 15 is wound leftward on the hose reel 8 in the figure.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects. That is, since the structure of the fire hydrant nozzle according to the present invention is configured as described above, the arrangement itself is effective, the structure itself can be made compact, and the space for storage and the like can be reduced without impairing the function.
Storage of the fire hydrant in the storage box or the like can be set in an extremely preferable state, and the operator can take out of the storage box from the storage box and improve operability.

Further, since the swivel pipe joint is provided between the nozzle body and the fire hose, for example, even if the fire hose is wound on a hose reel, or the hose itself has a twist or the like. Even if it does, it can pull out the hose smoothly without resistance.

Moreover, since the open / close valve is located on the handle side, even if the fire hose is twisted, the twisted state can be tolerated by relatively rotating between the open / close valve and the fire hose. In addition, the opening / closing operation does not become difficult due to the rotation of the position of the opening / closing valve. Furthermore, even if you open and close the open / close valve before pulling out the hose,
Even if deformation such as deformation force or extension occurs in the hose due to the water pressure and flow rate, the hose drawing operation is not hindered, and the hose is rich in safety.

Further, since the handle is a cylindrical body extending in the longitudinal direction made of a heat insulating material such as rubber, the temperature of water does not directly conduct to the handle. Even if the handle is held for a long time, the handle does not become too cold so that operation becomes difficult,
Operations such as digestive activity can be performed smoothly.

Furthermore, since the heat insulating air layer is formed between the inner peripheral surface of the handle and the outer peripheral surface of the nozzle body, the temperature of water is prevented from being directly conducted to the handle. The existing elasticity makes it easier to grasp the handle.

Further, since the anti-slip projection is formed on the outer peripheral surface of the handle, the operator can grasp the nozzle body reliably and stably, and can smoothly perform the operation.

Further, since the opening and closing valve can be opened and closed by a manual lever, the operation itself can be performed very easily and reliably.

Further, since a step portion for locking the hydrant nozzle is formed in the nozzle main body on the nozzle holder provided in the storage box of the fire hydrant, it can be securely locked in the storage box, and in some cases, the nozzle holder Various functions can be generated by removing the nozzle body from the nozzle. For example, it is also possible to configure a mechanism capable of rotating the hose reel. Further, the nozzle can be regularly arranged in the storage box, and the opening / closing door of the storage box can be opened, and the nozzle can be very easily removed from the nozzle holder.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a structure of a fire hydrant nozzle according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 4 is a side view of FIG. 3, FIG. 5 is a cross-sectional view taken along line VV of FIG. 3, and FIG. 6 is a partially cutaway front view showing an example of a fire hydrant. It is. 1 ... storage box, 7 ... door, 8 ... hose reel, 9
…… Nozzle, 10 …… Support, 12 …… Nozzle holder, 15…
... Hose, 16 ... Machine frame, 61 ... Nozzle body, 62
…… Swivel fitting, 63… Hose coupling fitting, 64 …… Opening / closing valve, 65 …… Manual lever, 66 …… Handle, 67 …… Water outlet, 68 …… Protrusion, 69 …… Insulated air layer, 71 ... Nozzle hook.

Claims (5)

(57) [Claims] 1. A fire hose connectable to a fire hydrant, a fire hose coupling fitting attached to an end of the fire hose, a swivel pipe joint having one end pivotally attached to the fire hose coupling fitting, A nozzle body having a water discharge port at one end fixed to the other end of the swivel fitting, located between an end face of the hose fitting and an end face of the nozzle body, and incorporated in the swivel fitting; An open / close valve, a manual lever protruding outside the swivel fitting for opening and closing the open / close valve, and a handle attached to the nozzle body so as to cover an outer peripheral surface of the nozzle body. Fire hydrant nozzle structure. 2. The fire hydrant nozzle structure according to claim 1, wherein said handle is formed of a longitudinally extending cylindrical body made of a heat insulating material. 3. The fire hydrant nozzle structure according to claim 1, wherein a heat insulating air layer is formed between an inner peripheral surface of the handle and an outer peripheral surface of the nozzle body. 4. The fire hydrant nozzle structure according to claim 1, wherein a non-slip projection is formed on an outer peripheral surface of the handle. 5. The fire hydrant according to claim 1, wherein the nozzle body has a locking portion for locking a fire hydrant nozzle to a nozzle holder provided in a storage box of the fire hydrant. Nozzle structure.