JPH0614779Y2 - Fire hydrant hose feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a hose feeding device for a fire hydrant.

[Conventional technology]

In a fire hydrant that stores a hose wound around a hose reel to prepare for fire fighting activities, the conventional hose feeding device rotatably supports the hose reel on the reel shaft. When it was pulled out, the hose reel was driven to rotate and the hose was extended.

On the other hand, when using a fire hydrant during fire extinguishing activities, it is common for a person to run with a hose to the point where the water is discharged, but if you suddenly stop and start running again during that time, or if the running speed is halfway. There are various cases such as blunting.

[Problems to be solved by the device]

However, when a person with a hose suddenly stopped while running, the hose reel that was feeding the hose following the withdrawal of the hose continued to rotate for a short time due to the inertia at that time, and by that inertia rotation The hose wound around the hose reel may be slackened, and when a person starts running again and the hose is pulled, the hose reel may not properly follow the rotation and the hose may not be smoothly delivered. Also, if the running speed of the person pulling out the hose is slow on the way, the feeding speed of the hose due to inertial rotation of the hose reel becomes faster than the drawing speed of the hose, causing slack in the hose, and the same inconvenience occurs. May occur.

The present invention has been made in view of the above circumstances, and when the hose withdrawal is stopped by constantly applying resistance to the hose reel when the hose reel is driven to rotate with the withdrawal of the hose. Hose supply device for fire hydrants that prevents coasting of the hose reel as much as possible when the drawing speed of the hose is slow, and does not cause the situation where the hose is unintentionally blocked by the inertial rotation of the hose reel. The purpose is to provide.

[Means for Solving the Problems]

A hose supply device for a fire hydrant according to the present invention is provided with a swivel joint that rotates integrally with a hose reel on a reel shaft that rotatably supports a hose reel, and a hose is formed through a water passage formed on the reel shaft and a swivel joint. In the fire hydrant adapted to be sent to the water, a spring retainer is fixed to the reel shaft, and a spring bearing facing the spring retainer is provided on the reel shaft so as to be slidable in the axial direction and non-rotatable, and A brake pad is interposed around the reel shaft between the spring retainer and the end surface of the swivel joint, and a compression spring for pressing the spring retainer to the brake pad is interposed between the spring retainer and the spring retainer. To do.

[Action]

According to this structure, the brake pad rubs against the end face of the swivel joint or the spring bearing by a force corresponding to the spring pressure of the compression spring, and a braking force is constantly applied to the hose reel that is driven to rotate as the hose is pulled out. Further, when the brake pad rotates together with the swivel joint, the brake pad rubs against the reel shaft to exert a braking force on the hose reel. Therefore, the rotation of the hose reel immediately stops when the hose is withdrawn, and when the hose withdrawal speed slows down, the rotation of the hose reel also slows down to a speed commensurate with that. The winding condition is kept normal.

〔Example〕

FIG. 1 is a front view showing a fire hydrant housed in a storage box 100,
2 is a sectional view of the same, FIG. 3 is a sectional view of a feeding device according to an embodiment of the present invention, FIG. 4 is an enlarged sectional view of an essential part of FIG. 3, and FIG. FIG.

The fire hydrant shown in FIGS. 1 and 2 includes a hose feeding device 1, a hose 2, a hose guide 3, a hose fixture 4, a valve 5, a water discharge nozzle 6, a connecting hose 7, a mounting frame 8 and the like. In addition, a storage box 100 accommodating a fire hydrant is equipped with an opening / closing door 110 and a panel box 101 equipped with a fire notification push button, an alarm and the like.

As shown in FIGS. 3 and 4, the hose feeding device 1 is attached to the mounting frame 8, and the feeding device main body 1 is provided.
0 and the braking mechanism 11.

The feeding device main body 10 includes a retainer 12 screwed to the mounting frame 8 and a reel shaft 13 held by the retainer 12.
A hose reel 16 rotatably supported on the reel shaft 13 via slide bearings 14 and 15, and a hose reel 16
And a swivel joint 17 that rotates integrally. The connecting hose 7 is connected to the starting end of the water passage 18 formed in the retainer 12 via a hose joint 19, and the water passage 21 formed in the terminal reel shaft 13 of the water passage 18 communicates with the connecting hose 7. Has been done. Further, the water passage 21 of the reel shaft 13 has a swivel joint 1
The hose 2 which is connected to the connecting hose 22 via 7 and which is wound around the hose reel 16.
Is connected to the beginning of the. Therefore, the hose 2 has a valve 5 (see FIGS. 1 and 2), a connection hose 7,
Pressure water is sent through the hose joint 19, the water passage 18, the water passage 21, the swivel joint 17, and the connection hose 22.

The braking mechanism 11 is screwed into the threaded portion 13a of the reel shaft 13 and is prevented from being loosened by the lock nut 25, the spring bearing 27 slidably fitted in the reel shaft 13 in the axial direction thereof, and the spring bearing 27. Notch hole 27a
Set screw 28 inserted into the reel shaft 13 and screwed into the reel shaft 13
And the spring bearing 27 and the end surface 17 of the swivel joint 17.
The brake pad 29 is interposed between the spring retainer 26 and the spring retainer 27, and the compression coil spring 30 is interposed between the spring retainer 26 and the spring retainer 27 to press the spring retainer 27 against the brake pad 29. 28 by reel shaft 13
The relative rotation between the spring receiver 27 and the spring receiver 27 is prevented.

According to the braking mechanism 11, the brake pad 29 is pinched by the spring receiver 27 and the end surface 17 a of the swivel joint 17 with a force corresponding to the spring pressure of the compression coil spring 30. Further, the inner peripheral surface of the brake pad 29 is the reel shaft 13
Contact with. Therefore, when the hose reel 16 is driven to rotate together with the slide bearings 14, 15 and the swivel joint 17 as the hose 2 is pulled out, the brake pad 29 causes the end surface 17 a of the swivel joint 17,
The spring bearing 27 and the reel shaft 13 rub against any one, two, or three places, and the driven rotation of the hose reel 16 is constantly braked by a force corresponding to the spring pressure.
Since the braking force at this time is adjusted by adjusting the spring pressure, the hose reel 16 does not rotate by inertia when the withdrawal of the hose 2 suddenly stops, and the hose reel 16 that rotates the hose reel 16 is driven. It is easy to determine the degree that does not affect the pulling force of the hose 2 so much, and if so, the force required for pulling out the hose 2 and the force required for winding the hose 2 around the hose reel 16 are conventionally used. The hose reel 16 is prevented from inertial rotation when the withdrawal of the hose 2 is suddenly stopped while maintaining the same degree as that of the hose supply device for the fire hydrant, and the winding state of the hose 2 wound around the hose reel 16 is prevented. It is kept in a normal state. Therefore, when the hose 2 is pulled out again, the hose reel 16 is driven to rotate accordingly, and the hose 2 is smoothly fed. Further, when the withdrawing speed of the hose 2 is slow, the rotation of the hose reel 16 is also braked and slows down to a speed commensurate with that, so that the wound state of the hose 2 wound around the hose reel 16 is maintained in a normal state. . Here, the braking force corresponds to the spring pressure of the compression coil spring 30, and the spring bearing 27 is provided on the reel shaft 13.
Since it is slidable in the axial direction of the brake pad 29
Even if abrasion occurs, the braking force hardly changes.

By the way, a known friction material can be used for the brake pad 29. However, if water is applied to the brake pad 29, there is a concern that the friction coefficient of the abutting surface may change and the braking action described above may be adversely affected. Therefore, in this embodiment, as shown in an enlarged view in FIG. 5, water leakage from the water passage 21 side is prevented by a seal material 31 such as an O-ring sandwiched between the swivel joint 17 and the reel shaft 13. In addition, the cylindrical portion 32 is integrally projected on the spring receiver 27, and the collar-shaped protruding portion 33 is integrally formed on the swivel joint 17 in a ring shape so as to face the inner peripheral surface of the cylindrical portion 32. The structure is such that external water does not easily enter the brake pad 29. In this way, the brake pad 29 gets wet with water and the braking action is less likely to be adversely affected. The cylindrical portion 32 and the protruding portion 33 may or may not be in contact with each other, but when they are not in contact with each other, it is desirable that the gap between them is as narrow as possible.

[Effect of device]

As described above, according to the present invention, since the braking force is constantly applied to the hose reel that is driven to rotate with the withdrawal of the hose, the person running with the hose suddenly stops on the way and the withdrawal of the hose is stopped. When it does, the rotation of the hose reel immediately stops and the hose wound around the hose reel is kept in a normal state, and when the person starts running again, the hose reel normally rotates to follow the hose smoothly. . When the running speed of a person holding a hose slows down on the way, the rotation of the hose reel also slows down to a speed corresponding to it and the hose winding state around the hose reel is kept in a normal state. The hose is delivered smoothly.

Further, since the braking force is generated by the spring pressure of the compression spring, even if the brake pad is worn, the magnitude of the braking force hardly changes, and the initial performance is maintained for a long time. There is also an advantage.

[Brief description of drawings]

FIG. 1 is a front view showing a fire hydrant housed in a storage box, FIG. 2 is a sectional view of the same, FIG. 3 is a sectional view of a feeding device according to an embodiment of the present invention, and FIG. 4 shows a main part of FIG. FIG. 5 is an enlarged sectional view, and FIG. 5 is an enlarged view of an X portion in FIG. 1 ... Hose feeding device, 2 ... Hose, 13 ... Reel shaft,
16 ... Hose reel, 17 ... Swivel joint, 17
a ... end face of swivel joint, 21 ... water passage of reel shaft, 26 ... spring retainer, 27 ... spring receiver, 29 ... brake pad, 30 ... compression coil spring.

Claims (1)

[Scope of utility model registration request] 1. A swivel joint that rotates integrally with a hose reel is provided on a reel shaft that rotatably supports a hose reel, and water is supplied to a hose through a water passage formed on the reel shaft and a swivel joint. In this fire hydrant, a spring retainer is fixed to the reel shaft, and a spring bearing facing the spring retainer is provided on the reel shaft so as to be slidable in the axial direction and non-rotatable, and the spring bearing and the swivel joint. Brake pad is interposed around the reel shaft between the end face of the fire hydrant and a compression spring for pressing the spring bearing against the brake pad is interposed between the spring retainer and the spring bearing. apparatus.