JP2630831B2 - Water discharge device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a water discharge device, and more particularly to a water discharge device used for an indoor or outdoor fire hydrant or the like.

The fire hydrant, which has been widely used in the past, is a fire hose type hose with the inner surface of a tubular woven fabric lined with rubber or the like, folded in a zigzag and stored in a fire hydrant box. When doing this, it was necessary to take out the entire length from the fire hydrant box and extend it, and if the hose was bent, it became impossible to pass water, making it difficult for inexperienced people to even satisfactorily pass water. .

Therefore, in recent years, there has been a demand for a fire hydrant which can be housed in a fire hydrant box in a state in which the hose is wound around a winder, and can be passed through the wind while being wound on the winder.

2. Description of the Related Art Fire hydrants of this type are generally wound around a hose, such as a rubber hose, that always keeps a circular cross section.
The hose is heavy, and the thickness of the hose is large, making it difficult to handle, and the fire hydrant becomes large, which is not preferable.

Therefore, if a conventional fire hose type hose can be wound around a winder and stored in a fire hydrant box, it will be light and easy to handle, and the fire hydrant will also be compact. Hose-type hoses are usually folded flat, and cannot be swollen even if you try to pass water while wound around the winder,
Can not be used.

As a solution to this point, Japanese Patent Application Nos. 62-271500, 62-317152, 62-317
153 and Japanese Patent Application No. 62-331771.

In these devices, the winding frame of the winder can be radially reduced, and the water pressure applied to the hose during water flow causes the winding frame to shrink radially, thereby expanding the hose into a cylindrical shape. It is designed to forgive.

Problems to be Solved by the Invention According to these inventions, it is possible to use a hose of the fire hose type, which has not been able to pass water while being wound on a reel, and to pass water while being wound on a reel. This has enabled the fire hydrant to be more compact and, at the same time, to be able to discharge water at high pressure, but this has created new problems.

That is, the hose of the fire hose type has a lining formed on the inner surface of a tubular woven fabric as described above, and the tubular woven fabric is formed by weaving a high-strength warp yarn and a weft yarn in a tubular shape. Therefore, when the hose is inflated into a cylindrical shape, it is difficult to bend, and tends to extend linearly when an internal pressure is applied. However, since the hose wound on the reel is curved, when water flows through the hose and an internal pressure is applied, and a force is exerted on the hose to extend linearly, the force draws the hose from the reel. Acting on the reel, the reel begins to rotate in the hose payout direction.

Therefore, when the water is discharged, the hose may be unreeled from the reel, and the hose may come off the outer periphery of the reel, or the hose may be entangled or bend locally to cause a kink phenomenon, thereby preventing water from flowing. is there.

This tendency also exists in ordinary rubber hoses and the like, but is particularly remarkable in fire hose types. In recent years, as a hose with a special form of fire hose type that can be wound on a reel, weaving a metal wire or a synthetic resin bristle into the weft of a tubular woven fabric to prevent it from flattening, Although lined hoses have been proposed and attracted attention, the above-mentioned phenomenon is remarkable even in such hoses.

As a means for solving these problems, a brake means can be applied to the rotation of the reel to prevent it from inadvertently rotating, but the rotation force generated on the reel is proportional to the magnitude of the water pressure applied to the hose. Therefore, if the resistance is low, the reel may start to rotate when high pressure is applied to the hose. Conversely, if the resistance is too high, it becomes difficult to feed the hose at a low pressure, which hinders fire fighting activities. Therefore, it is extremely difficult to set the magnitude of the resistance.

The present invention has been made in view of the above circumstances, and has as its object to prevent a reel from rotating carelessly when water is supplied and a hose from being fed out.

Means for Solving the Problems According to the present invention, a reel is rotatably mounted on a support and water is passed through a hose wound around the reel through a shaft of the reel. The rotating shaft is rotatably and axially slidably fitted to the fixed shaft so as to be watertight, the reel is fixed to the rotating shaft, and a part of the support or the fixed shaft and the reel are fixed. Alternatively, a part of the rotating shaft is frictionally engaged with the rotating shaft such that the rotating shaft slides against the fixed shaft by water pressure so as to be pressed against and separated from each other.

In the present invention, when no water pressure is applied to the hose, the frictional engagement between the support or the fixed shaft and the reel or the rotating shaft is released, and the reel freely rotates with respect to the support. Can be.

Here, when water is passed through the hose, first, water pressure is applied to the fixed shaft and the rotating shaft, and the rotating pressure slightly slides the rotating shaft with respect to the fixed shaft due to the water pressure. Due to this sliding, a part of the support or the fixed shaft and a part of the reel or the rotating shaft are frictionally engaged with each other so as to be in pressure contact with each other, thereby causing resistance to the rotation of the reel. Also, it is possible to rotate the reel against this resistance and to extend the hose.

Since the magnitude of the frictional resistance is substantially proportional to the magnitude of the hydraulic pressure, the resistance is small when the hydraulic pressure is small, and the rotational resistance of the reel is large when the hydraulic pressure is large.

In the present invention, the fixed shaft 2 and the rotating shaft 3 need to be slidable. However, the range of the sliding is sufficient if the rotating shaft 3 or the reel 5 and the support 1 or the fixed shaft 2 move between the state where the frictional engagement is performed and the state where the frictional engagement is released. A movement distance of 1 mm or less is sufficient. Therefore, it is not necessary to guarantee that the vehicle slides over a greater distance.

According to the present invention, therefore, the reel can be freely rotated since there is no resistance to the rotation of the reel when water is not passed through the hose, and the hose can be wound up or extended.

When water pressure is applied, frictional resistance occurs against the rotation of the reel, the reel rotates by the force that the hose tries to extend linearly, and the hose does not inadvertently draw out, causing the hose to entangle or kink. It does not happen. Also, since the magnitude of the resistance is almost proportional to the magnitude of the water pressure, the resistance is small when the pressure is small and does not hinder the hose from being pulled out. To prevent the hose from being fed out.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the water discharge device of the present invention. Reference numeral 1 denotes a support, and a fixed shaft 2 is fixed to the support 1, and a rotating shaft 3 is rotatably and axially slidably fitted to a tip of the fixed shaft 2; It is sealed watertight by a ring 4.

The reel 5 is fixed to the rotating shaft 3. The reel 5 has a pair of flanges 6 and 7, one flange 6 is fixed to the rotating shaft 3, and the other flange 7 is rotatably and slidably supported by the fixed shaft 2. A winding bed 8 is suspended between the flanges 6 and 7, and a hose 9 is wound around the winding bed 8. Thus, water is passed through the hose 9 via the fixed shaft 2 and the rotating shaft 3.

In this embodiment, the friction member 10 is fixed to the outer periphery of the fixed shaft 2 very close to the inner side surface of the flange 7, and the inner side surface can be separated from and brought into contact with the friction member 10 by sliding of the flange 7. It has become.

Thus, according to this embodiment, when no water pressure is applied to the fixed shaft 2 and the rotating shaft 3,
The flange 7 and the friction member 10 are not pressed against each other, and the reel 5 can rotate freely with the rotating shaft 3.
The hose 9 can be wound up and extended.

When water pressure is applied, the water pressure causes the rotary shaft 3 to slightly slide in the direction in which it extends with respect to the fixed shaft 2, that is, rightward in the drawing. As a result, the reel 5 also moves to the right in the figure as a whole, and the inner side surface of the flange 7 is a friction member.
It is pressed against 10 and frictionally engaged. Therefore, resistance occurs to the rotation of the reel 5, and even if a force that causes the hose 9 to linearly extend due to the water pressure acts, the reel 5 rotates in the feeding direction of the hose 9 due to the force, and the hose 9 becomes improper. It doesn't come out easily.

Further, since the rotation resistance is a friction resistance, the reel 5 can be rotated against this resistance, and the hose 9 can be pulled out and pulled out as needed.

The present invention is not limited to the structure of the above embodiment. In the present invention, since the support 1 and the fixed shaft 2 are integrated and fixed, and the rotating shaft 3 and the reel 5 rotate integrally therewith, the support 1 or the fixed shaft 2 is fixed. And a portion of the rotary shaft 3 or the reel 5 may be frictionally engaged at the time of pressurization, and the position and the mode of the frictional engagement are not limited. Part of the friction member 10
It is also possible to interpose other members such as.

FIG. 2 shows another embodiment of the present invention, in which an annular friction member 11 having a substantially U-shaped cross section is fixed to the distal end portion of the fixed shaft 2, and the distal end edge of the friction member 11 is fixed. Is loosely fitted into a concave groove 12 formed on the outer periphery of the rotating shaft 3.

In this example, when the rotating shaft 3 slides, the side edge of the concave groove 12 is pressed against the friction member 11 and frictionally engages.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view showing one embodiment of the present invention,
FIG. 2 is a central longitudinal sectional view of a main part showing another embodiment. DESCRIPTION OF SYMBOLS 1 ... Support body, 2 ... Fixed shaft 3 ... Rotary shaft, 5 ... Reel 9 ... Hose, 10,11 ... Friction member

Claims (1)

(57) [Claims] 1. A reel (5) rotatably mounted on a support (1), and a hose (9) wound around the reel (5) through a shaft (2, 3) of the reel (5). And a rotating shaft (3) is fitted to a fixed shaft (2) fixed to the support (1) so as to be rotatable and slidable in the axial direction and watertight. The reel (5) is fixed to a rotating shaft (3), and a part of the support (1) or the fixed shaft (2) and a part of the reel (5) or the rotating shaft (3) are fixed by hydraulic pressure. A water discharge device characterized in that the rotary shaft (3) is frictionally engaged with the fixed shaft (2) such that the rotary shaft (3) slides against the fixed shaft (2) so that the rotary shaft (3) comes into pressure contact with the fixed shaft (2).