JP5187647B2 - Strainer device for fire-fighting suction hose - Google Patents

Description

The present invention relates to a strainer device which is attached to a suction side end of a fire-fighting suction hose and filters water absorption so that unnecessary materials such as dust and gravel are not sucked.

As shown in FIG. 6, when a water source for fire extinguishing is obtained from a river, a lake, a water storage tank or a pool, the suction hose 2 is connected to the pump of the fire engine 1, and the suction side end of the suction hose 2 is connected to the suction hose 2. It is immersed in a water source, and the water sucked by starting the pump is sent to the fire hose.

At this time, a strainer device 3 for filtering the water absorption is attached to the suction side end of the suction hose 2 so that unnecessary substances such as dust and gravel contained in the water source are not sucked (Patent Document). 1).

As shown in FIG. 7, the conventional strainer device 3 is attached by screwing a strainer 4 into an end fitting provided at the suction side end of the suction hose 2, and dust-proofing so as to cover the outside of the strainer 4. A cover 6 made of canvas and attached to the opening end of the dust guard 5 was bound to the suction hose 2 with a string 7.

As described above, in the conventional strainer device 3, the strainer 4 and the dust guard 5 function independently of each other. Therefore, in order to attach the dust guard 5 to the suction hose 2, a canvas cover 6 is used. There was no other way than using it.

Japanese Patent Laid-Open No. 9-38234

By the way, the suction hose 2 is heavy and used in an emergency, so that the handling thereof is rough. Therefore, there is a problem that the canvas cover 6 is easily broken and the frequency of replacing the dust guard 5 is increased.

Further, as shown in FIG. 6, the suction hose 2 is attached to the side of the body of the fire engine 1 when it is not in use, but when the canvas cover 6 is used for the strainer device 3,
There is also the problem that it looks bad.

Accordingly, an object of the present invention is to provide a strainer device for a fire-fighting suction hose that can improve durability and appearance by omitting the use of a canvas cover.

In order to solve the above problems, the invention of claim 1 is directed to a strainer provided with an internal thread on the inner periphery of the opening side end portion, a dust guard covering the strainer so as to cover the outside, and the strainer. A hook member that joins the strainer and the dust guard so that they do not come out of each other by being inserted into an annular gap formed between the peripheral walls of the dust guard, and covers the opening side end of the dust guard. An annular cover to be attached, a strainer provided with an internal thread on the inner periphery of the opening side end, a male thread cylinder that is threaded into the female thread of the strainer, and a female thread cylinder that can be screwed into the end fitting of the suction hose A cylindrical joint fitting , wherein the hook member extends in the axial direction from an annular body that is externally fitted to the strainer, and is formed of synthetic resin with a peripheral wall of a dust guard Provide engaging claws to engage Made is to have elasticity along the radial direction of the shade dust on each arm basket by Rukoto, are engaged resiliently engages the peripheral wall of the shade dust cage engaging claws, said strainer, one end opening Then, it is formed in a cylindrical shape with the other end closed and provided with a large number of water passage holes around it, and an annular body of a hook member fitted on the outer peripheral surface near one end side of this strainer moves to the other end side. A configuration is adopted in which a suction hose pull-up rope is connected to a stainless steel band that is rotatably wound around a circumferential groove provided on the outer periphery of the female screw cylinder .

The invention of claim 2 comprises a second joint fitting that can be screwed into the female thread cylinder of the joint fitting, and a connection cylinder coupled to an end of the second joint fitting, and an outer periphery of the connection cylinder. A plurality of locking balls incorporated in a state in which a locking groove is provided in the surface, and the holder can be inserted in the connection tube, is movable in the radial direction and is elastic inward. A configuration that can be engaged with the stop groove is adopted.

Here, the internal thread provided on the inner periphery of the opening side end of the strainer is formed to a size that can be engaged with the external thread provided on the end fitting of the compatible suction hose, and the joint fitting is formed of an internal thread cylinder. By selecting the inner diameter, it is possible to attach the strainer device to suction hoses having different diameters.

In addition, the dust guards to be placed on the strainer are made of synthetic resin flat wire vertically and horizontally, knitted into a cylindrical shape with a bottom that is larger than the strainer, and the inner peripheral wall of the horizontal flat wire has hook hook engaging claws. It is designed to engage.

In addition, the female thread cylinder of the above fitting fitting has a stainless steel band rotatably wound around a circumferential groove provided on the outer periphery, and a pulling rope is connected to the band via a return and a hook. The suction end can be lifted to the ground together with the strainer device.

According to the present invention, the hook member is inserted into the annular gap formed between the strainer and the peripheral wall of the dust guard placed on the strainer, and the strainer and the dust guard are coupled by the hook member so as not to come out from each other. Therefore, it is possible to fix the dust basket to the strainer connected to the suction hose with a hook member, thereby eliminating the canvas cover that was conventionally used to install the dust basket and making it rough. The use can eliminate the problem of the canvas cover being torn after a short period of use, improving the durability of the strainer device attached to the suction hose and improving the appearance.

In addition, if a cylindrical fitting is used for attaching the strainer to the suction hose, the strainer device can be attached to the suction hose having different diameters by selecting the inner diameter of the female screw cylinder.

Furthermore, when a pull-up rope is connected to the female thread cylinder of the joint fitting, the pull-up rope can smoothly perform the work of pulling up the suction end portion of the suction hose introduced into the water source together with the strainer device.

Exploded perspective view of strainer device according to the present invention Vertical front view showing the assembled state of the strainer device according to the present invention Front view showing a strainer device using a combination of fittings with a pull-up rope (A) is a vertical front view showing a strainer device using a combination of joint fittings, (b) is a vertical front view of a disassembled state using a combination fitting with a pulling rope and (c) is a vertical section in the same assembled state. Front view (A) is a front view of a disassembled state showing an example of performing a one-touch connection to a suction hose of a strainer device using a combination fitting, and (b) is a front view showing a connection state of the strainer device and the suction hose using a combination fitting. Figure, (c) is a front view of the connected state in which a fitting with a pull-up rope is combined with the above. Side view of a fire engine with a suction hose Longitudinal front view showing a conventional strainer device

  Hereinafter, embodiments of the present invention will be described based on illustrated examples.

  1 and 2 show a first embodiment of the strainer device of the present invention.

The strainer device 11 includes a strainer 12 that is screwed onto an end fitting on the suction side of the suction hose 2 and a dust guard 1 that covers the strainer 12 so as to cover the outside.
3 and a hook member 14 that couples the strainer 12 and the dust guard 13 so as not to come out from each other by being inserted into an annular gap formed between the peripheral wall of the strainer 12 and the dust guard 13.
And an annular cover 15 that is attached to the opening side end of the dust guard 13.

The strainer 12 is formed in a cylindrical shape having one end side opened and the other end side closed, and is provided with a large number of water passage holes 16 around the strainer 12, and the suction hose 2 is formed on the inner peripheral surface of the strainer 12 at one end side opening. A female screw 17 is provided for screwing into the end fitting.

The dust guard 13 uses a vertical flat wire 13a and a horizontal flat wire 13b made of synthetic resin, and has a bottomed cylindrical shape whose diameter and length are larger than those of the strainer 12, so that the periphery is water-permeable. It is knitted.

The hook member 14 has a plurality of arms 19 extending in an axial direction on an annular body 18 that is fitted to the strainer 12 at one end side thereof, and an engaging claw 20 on the outer surface of the distal end portion and the root side portion of each arm 19. This hook member 14 is made of synthetic resin, so that each arm 19 has elasticity along the radial direction of the dust guard 13, and the engaging claw 20 has a peripheral wall of the dust guard. Can be elastically engaged with the horizontal flat wire 13b.

The engaging claw 20 of the hook member 14 does not engage with the horizontal flat wire 13b when entering the inside of the dust guard 13, and conversely, in the extraction direction with respect to the dust guard 13, the flatness is flat. By engaging with the wire 13b, it becomes impossible to extract.

A flange 21 is provided on the outer peripheral surface near the one end side of the strainer 12 to restrict the movement of the annular body 18 of the hook member 14 fitted to the strainer 12 to the other end side.

The strainer device 11 of the first embodiment is configured as described above. To attach the strainer device 11 to the suction side of the fire-fighting suction hose 2, first, the cover 15 and the hook member 14 are attached to the suction hose 2. Next, the strainer 12 is attached to the suction hose 2 by screwing the female screw 17 of the strainer 12 into the male screw formed on the end fitting of the suction hose 2. Cover the shade 13.

While holding the dust guard 13 so as not to move, the hook member 14 inserted through the suction hose 2 is moved to the strainer 12 side, and the arm 19 provided on the annular body 18 is connected to the strainer 12 and dust. When inserted into the annular gap formed between the peripheral walls of the flange 13, each arm 19
The engaging claw 20 provided on the inner surface of the dust guard 13 is rubbed against the inner peripheral surface of the dust guard 13 and moved to a position where the annular body 18 is fitted to the strainer 12 and abuts against the flange 21, via the hook member 14. A dust guard 13 is attached to the strainer 12.

When the annular member 18 of the hook member 14 comes into contact with the flange 21 and stops, the tip of the engaging claw 20 provided on each arm 19 comes into pressure contact with the inner peripheral surface of the dust guard 13 as shown in FIG. Therefore, when a force is applied to the strainer 12 in such a direction that the dust member 13 comes out, the hook member 14 is prevented from coming off by the annular body 18 coming into contact with the flange 21, and at the same time, the tip of the engaging claw 20 is moved. Since the dust guard 13 is engaged with the horizontal flat wire 13b forming the dust guard 13, the dust guard 13 is prevented from coming off, thereby fixing the dust guard 13 to the strainer 12, and finally the annular cover. If 15 is fitted to the end of the dust guard 13, the installation work is completed.

In this way, the suction hose 2 to which the strainer device 11 is attached allows the strainer device 11 to be immersed in a water source, starts the pump, and discharges water from the fire hose. The strainer device 11 absorbs water. Occasionally, filtration by the double structure of the dust bowl 13 and the strainer 12 prevents inhalation of unnecessary substances such as dust and gravel contained in the water source.

FIG. 3 shows a second embodiment of the strainer device 11, in which a fitting 23 connected to a suction hose pulling rope 22 is used in combination for attachment to the suction hose 2.

The joint fitting 23 is formed into a cylindrical shape by integrating a male screw cylinder 24 screwed into the female screw 17 of the strainer 12 and a female screw cylinder 25 screwed into the end fitting of the suction hose 2. A stainless steel band 27 is rotatably wound around a circumferential groove 26 provided on the outer periphery, and the pulling rope 22 is connected to the band 27 via a return 28 and a hook 29.

The strainer device 11 according to the second embodiment is attached to the suction hose 2 via a joint fitting 23, and by connecting a long pulling rope 22 to the joint fitting 23, the suction side of the suction hose 2 introduced into the water source. The end portion can be lifted to the ground together with the strainer device 11 by the pulling rope 22.

FIGS. 4A to 4C show a third embodiment of the strainer device 11, and the second joint fitting 30 is used in combination for attachment to the suction hose 2.

The second joint fitting 30 is formed into a cylindrical shape by integrating a male screw cylinder 31 screwed into the female screw 17 of the strainer 12 and a female screw cylinder 32 screwed into the end fitting of the suction hose 2. By selecting the inner diameter, the strainer device 11 can be attached to the suction hose 2 having different diameters.

4 (b) and 4 (c) use a combination of the joint fitting 23 of the second embodiment and the second joint fitting 30 of the third embodiment, and the connection and diameter of the pulling rope 22 are different. The example which enabled it to respond | correspond to the suction hose 2 simultaneously is shown.

5A to 5C, the joint fitting 23 and the second joint fitting 30 described above are used to attach the strainer device 11 to the suction hose 2, and the joint fitting 23 and the second joint fitting 30 are used.
The example which made it possible to attach the strainer apparatus 11 to the suction hose 2 by one touch using FIG.

In the example shown in FIG. 5, the holder fitting 33 is attached to the end fitting of the suction hose 2 in advance by screwing, and is coupled to the end of the female screw cylinder 25 or 32 of the fitting fitting 23 or the second fitting fitting 30. When a locking groove 35 is provided around the outer peripheral surface of the connecting tube 34 and the connecting tube 34 is inserted into the holder metal 33, the illustration is omitted, but it can move in the holder metal 33 in the radial direction and has inward elasticity. The plurality of locking balls incorporated in the biased state engage with the locking groove 35, and the strainer device 11 can be attached to the suction hose 2 by one-touch operation.

When the strainer device 11 is removed, the suction hose 2 and the strainer device 11 may be separated by a force that overcomes the elastic engagement force between the locking ball and the locking groove 35.

2 Suction hose 11 Strainer device 12 Strainer 13 Dust guard 14 Hook member 15 Annular cover 16 Water passage hole 17 Female thread 18 Annular body 19 Arm 20 Engaging claw 21 Flange 22 Lifting rope 23 Joint fitting 24 Male thread cylinder 25 Female thread cylinder 26 Circumferential groove 27 Stainless steel band 28 Return 29 Hook 30 Second joint fitting 31 Male thread cylinder 32 Female thread cylinder 33 Holder metal fitting 34 Connection cylinder 35 Locking groove

Claims (2)

Inserted into a strainer with an internal thread on the inner periphery of the opening side end, a dust guard covering the strainer so as to cover the outside, and an annular gap formed between the strainer and the peripheral wall of the dust guard A hook member that couples the strainer and the dust guard so as not to be pulled out from each other, an annular cover that is attached to the opening side end of the dust guard, and a female screw on the inner periphery of the opening side end. A strainer provided with, a male threaded cylinder that is threaded into the female thread of the strainer, and a cylindrical joint bracket with a female threaded cylinder that can be screwed into the end fitting of the suction hose ,
The hook member is formed by providing an engaging claw that engages with a peripheral wall of a dust keeper on a plurality of arms that are axially extended from an annular body that is externally fitted to a strainer and is formed of synthetic resin . is to have elasticity along the radial direction of the shade dust on each arm basket by Rukoto, are engaged resiliently engages the peripheral wall of the shade dust cage engaging claws,
The strainer is formed in a cylindrical shape having one end opened and the other end closed, and provided with a large number of water passage holes around it. An annular body of a hook member fitted on the outer peripheral surface near one end of the strainer. Is provided with a flange that restricts movement to the other end side,
A suction hose pull-up rope is connected to a stainless steel band rotatably wound around a circumferential groove provided on the outer periphery of the female screw cylinder.
A strainer device for a fire-fighting suction hose. A second joint fitting that can be screwed into the female thread cylinder of the joint fitting; and a connection cylinder that is coupled to an end of the second joint fitting. And a plurality of locking balls incorporated in a state in which the connecting cylinder can be inserted into the holder metal fitting that can be moved in the radial direction and inwardly biased, can be engaged with the locking groove. The strainer device for a fire-fighting suction hose according to claim 1, wherein the strainer device is provided.

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