JP2000329280A - Disengagement preventing tool for fitting for fire hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of unexpecting disengagement of a fitting for a fire hose. SOLUTION: This disengagement preventing tool comprises an approximate cylindrical insertion metal fitting 2 having an annular protrusion part 5 formed on the outer peripheral surface of an end part; and an approximate cylindrical receiving metal fitting 3 provided on the inner peripheral surface of an end part with three engaging claws 6 disengageably engaged with the annular protrusion part 5. The insertion metal fitting 2 comprises a ring part 8 situated slidably in the direction of a cylinder length on the outer peripheral surface on the anti-receiving metal fitting side of the annular protrusion part 5; and a release ring 7 containing a protruding operation part 9 situated on the anti-receiving metal fitting side of the ring part 8. When by pushing the operation part 9, the release ring 7 is slid to the receiving metal fitting 3 side the ring part 8 displaces the engaging claw 6 to disengage engagement between the engaging claw 6 and the annular protrusion part 5. In a so formed disengagement preventing tool 20 used in a fitting 1 for a fire hose 4, the disengagement preventing tool 20 is constituted such that the tool is removably mounted on the outer periphery of the release ring 7 and an operation part 9 is locked at the receiving metal fitting 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disconnection preventing device for preventing unintentional disconnection of a fire hose connecting fitting.

[0002]

2. Description of the Related Art A Machino-type (registered trademark) coupling fitting 81 is illustrated as a conventional coupling fitting for a fire hose. As shown in FIG. 7, the coupling fitting 81 has an annular projection 8 as an engaged portion.
5 is provided on the inner peripheral surface of the end, and a cylindrical fitting 82 provided on the outer peripheral surface of the end and a plurality of engaging claws 86 as an engaging portion removably engaged with the annular projection 85. A ring portion 88 provided on the outer peripheral surface of the annular projection 85 on the counter receiving bracket side so as to be slidable in the cylinder length direction;
A release ring 87 including a flange-shaped operation portion 89 provided on the side of the ring portion 88 opposite the receiving bracket is provided. Then, when the operating portion 89 is pushed and the release ring 87 is slid to the receiving bracket side, the ring portion 88 displaces the engagement claw 86 so that the engagement between the engagement claw 86 and the annular protrusion 85 is released. It is configured.

At the time of fire extinguishing, a plurality of hoses 84 are connected to the fittings 81 in accordance with the distance from the water source to the fire extinguishing object.
Used in conjunction with

[0004]

However, for example, when the hose 84 is extended by a hose car or the like in which the hoses 84 are bundled and stacked, the operation unit 89 is attached to obstacles such as stones, rocks, trees, walls, and walls. May be caught, the release ring 87 slides toward the receiving fitting against the intention of the operator, and the connection between the fitting and the receiving fitting may be released. For this reason, when extending the hose 84, it is necessary to always pay attention to the state of the hose 84 extending rearward from the hose car or the like, and the safety confirmation in the forward direction (hose extension direction) is likely to be neglected. Then, if the water discharge is started without noticing that the fitting 81 has come off, there is a problem that the water leaks therefrom, and the water cannot be discharged.

In a forest fire, when the hose 84 is extended so as to cross the slope of the mountain diagonally and water discharge is started,
The weight of the water passing through the hose 84 causes the hose 84 to slip down the slope. At this time, there is a problem that the release ring 87 is caught by the obstacle on the slope of the mountain, and the coupling fitting 81 may come off.

[0006] In addition, a large-scale fire caused by a large-scale disaster such as a large earthquake requires a large amount of water. Therefore, it is necessary to obtain water not only near a fire site but also from a distant place. is there. At this time, in order to obtain water from a distant place, it is necessary to connect a large number of hoses 84 to each other by connecting metal fittings 80, and in order to obtain more water, it is necessary to prepare multiple systems. However, since the conventional fittings 81 have the above-mentioned problems, it is extremely difficult to extend a plurality of hoses 84 connected in this manner simultaneously in multiple systems.

An object of the present invention is to solve the above-mentioned problems and to provide a detachment prevention device capable of preventing unintentional detachment of a fire hose connecting fitting.

[0008]

In order to achieve the above-mentioned object, the present invention provides a fire hose coupling fitting with a substantially cylindrical fitting having an engaged portion on an outer peripheral surface of an end portion. A substantially cylindrical receiving fitting provided on an inner peripheral surface of an end portion with an engaging portion removably engaged with the engaged portion, wherein the fitting is on a side opposite to the receiving fitting of the engaged portion. A ring portion provided on the outer peripheral surface slidably in the cylinder length direction, and a release ring including a protruding operation portion provided on the counter receiving bracket side of the ring portion, and pressing the operation portion, When a release ring is slid to the receiving fitting side, the ring part displaces the engaging part, and the fitting part for the fire hose configured to disengage the engaging part and the engaged part. A detachment prevention device, which is detachably attached to an outer periphery of the release ring,
The operation unit is configured to be locked to the receiving fitting.

The disengagement prevention device comprises a belt member formed in a substantially arc shape so as to elastically hold the outer circumference of the release ring, and one side of the belt member is brought into contact with a receiving metal side of the operation portion. An example is provided in which the belt member is configured to be in contact with the other side portion of the belt member so as to contact the distal end surface of the receiving member.

[0010] The length of the belt body may be, for example, a length formed so as to grip at least one half or more of the circumference of the release ring. The belt may be formed to have a length that grips substantially the entire outer circumference of the release ring.

The both ends of the belt body are not particularly limited, but the following embodiments can be exemplified. (1) An aspect in which each is formed in a V-shape. (2) An aspect in which the sides of the tip are formed to be parallel to each other.

[0012] The detachment preventing device includes a belt member which is formed in a length capable of surrounding at least substantially the entire outer periphery of the ring portion, and is provided on one end side and the other end side of the belt body. A connecting portion and a connected portion for connecting the both ends of the belt body in a state surrounding the outer periphery of the ring portion, and one side of the belt body is on a receiving metal side of the operating portion. And the other side portion of the belt body is configured to contact the distal end surface of the receiving fitting.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention embodied in a tool for preventing detachment of a Machino type (registered trademark) fitting which is widely used as a fitting for a fire hose will be described below with reference to the drawings. I do.

First, the connecting fitting 1 will be described. As shown in FIG. 1, the connecting fitting 1 includes a cylindrical fitting 2 and a cylindrical receiving part into which the fitting 2 is concentrically inserted. Metal fittings 3. The fitting 2 and the receiving fitting 3 are respectively attached to ends of a pair of hoses 4 to be connected.

The fitting 2 has an annular projection 5 as an engaged portion on the outer peripheral surface of the end portion, and is slidably provided on the outer peripheral surface of the engaged portion on the side of the receiving bracket so as to be slidable in the cylinder length direction. The release ring 7 includes a ring portion 8 and a flange-shaped operation portion 9 provided on a side of the ring portion 8 opposite the receiving bracket. The slidable length of the ring portion 8 is, for example, 15 mm.
Is set to

The receiving fitting 3 is provided with three engaging claws 6 on the inner peripheral surface of the end portion as engaging portions which are removably engaged with the annular projection 5. These engaging claws 6 are arranged at equal intervals in the circumferential direction. As shown in FIG. 2, each engaging claw 6 has a substantially triangular cross section and is formed in an arc shape, and is set to have a length covering a range of approximately 60 ° in the circumferential direction on the inner peripheral surface of the receiving fitting 3. ing. Each engaging claw 6 is attached to the leaf spring 1.
1 urges the receiving fitting 3 inward in the radial direction. A rubber band 12 for protection and non-slip is attached to the outer periphery of the receiving fitting 3. A rubber packing 13 that is tightly attached to the outer periphery of the tip of the inserted fitting 2 and maintains water tightness is provided on the inner side of the receiving fitting 3 inside the cylinder.
Is provided.

Next, a disengagement preventing tool 20 for the joining fitting 1
Will be described. The detachment preventing device 20 is detachably attached to the outer peripheral surface of the ring portion 8 of the release ring 7, and has a length capable of covering substantially the entire outer peripheral surface of the ring portion 8 of the release ring 7. And a belt body 21 formed in a substantially arc shape with a central angle of about 360 °. Safety device 2
The material of 0 is not particularly limited as long as it has elasticity, and examples thereof include an elastic resin and an elastic metal. In this embodiment, vinyl chloride is employed as the elastic resin. Each end 22 of the belt body 21 of the slip-off preventing device is formed in a substantially protruding V-shape, and when attached to the outer peripheral surface of the release ring 7, both ends 2.
The two V-tips are formed so as to be at alternate positions. In addition, the width of the belt body 21 of the detachment preventing device 20 is set to be slightly shorter than this length, for example, 13 to 14 mm, corresponding to the sliding length of the ring portion 8 of 15 mm.
In the state where the receiving fitting 3 and the fitting 2 are connected, a slight play is provided between the ring portion 8 of the release ring 7 and the engaging claw 6, so that the width of the belt body 21 is reduced. It suffices to have a length obtained by subtracting this play length from the slide length of the ring portion 8. For example, if the slide length is 15 mm and the play length is 4 to 5 mm, it is sufficient if the width of the belt body 21 is 10 to 11 mm.

In order to manufacture the detachment preventing device 20, for example, a polyvinyl chloride pipe having an inner diameter smaller than the outer diameter of the release ring 7 is prepared, cut into a width of about 13 to 14 mm, and cut into a short cylindrical shape. Formed. Then, an arbitrary part of the peripheral wall of the short-cylindrical vinyl chloride is cut, and both sides of the cut portion are each formed into a protruding V-shape to complete the process.

The following two methods can be used, for example, to mount the detachment preventing device 20 on the fitting 1. (1) This is a method of mounting when the receiving fitting 3 and the fitting 2 are combined. In this method, first, FIGS.
As shown in FIG. 2A, a stopper 20 is attached to the outer periphery of the ring portion 8 of the release ring 7 from the distal end side of the fitting 2, and in this state, the fitting 2 is received as shown in FIG. When inserted into the metal fitting 3, the engaging claw 6 of the receiving metal fitting 3 engages with the annular projection 5 of the fitting 2 with the detachment preventing tool 20 attached to the connecting metal fitting 1, and the receiving fitting 3 and the fitting 2 Are combined. (2) This is a method of attaching to the connecting fitting 1 in a state where the receiving fitting 3 and the fitting 2 are connected. In this method, FIG.
(A) As shown in the front view of the detachment prevention device, the detachment prevention device 2
One end 22 of the belt body 21 is pinched with the thumb 18 and the index finger 19 of one hand and the other hand, and both ends 22 of the belt body 21 are spread right and left. In this state, as shown in the sectional view of FIG. 3B viewed from the fitting side, the coupling fitting 1 is put on the ring portion 8 of the release ring 7, and when the hand is released, the detachment preventing tool 20 is returned to its original state by its elasticity. It returns to an arc shape and holds the ring portion 8. Thus, the detachment prevention device 2
0 can be attached to the fitting 1.

When the detachment preventing device 20 is attached to the coupling fitting 1 in this manner, one side 23 of the belt body 21 is
And the other side 24 of the belt body 21 abuts against the distal end surface of the receiving member 3, whereby the operating portion 9 is locked to the receiving member 3. I have. That is, the detachment preventing device 20 is configured to maintain the distance between the operation unit 9 and the receiving metal 3 by preventing the release ring 7 from sliding toward the receiving metal. For this reason, when the hose 4 is extended by a hose car or the like, the operation unit 9 is caught on a rock, a wall, a fence, or the like on the road, and the release ring 7 is attached to the worker when the hose 4 is extended with the detachment prevention device 20 unlike the related art. There is no sliding at all against the intention of.

In order to remove the disengagement preventive device 20, as shown in FIGS. 4 (a) and 5, one end and the other end 22 of the belt body 21, for example, the index finger 19 Can be removed by extending the release ring 7 right and left along the outer peripheral surface of the ring portion 8 of the release ring 7. At this time, since a substantially triangular gap 25 is formed on the left and right of each end 22 of the belt body 21, by inserting the tip of the index finger 19 into this gap 25, each end 22 of the belt body 21 is The index finger 19 can be easily hung.

Then, as shown in FIG.
And slide the release ring 7 toward the metal fitting. Then, the ring portion 8 pushes up the engagement claw 6 to release the engagement between the engagement claw 6 and the annular protruding portion 5.
As shown in (c), the coupling between the receiving fitting 3 and the fitting 2 is released.

It should be noted that the present invention is not limited to the above-described embodiment, and can be embodied by appropriately changing the scope of the invention as follows, for example, as follows. (1) A non-slip means is provided on the surface of the belt body 21. The non-slip means is not particularly limited, but may include roughening the outer peripheral surface of the belt body 21, providing a protrusion or a concave portion, attaching a non-slip member, or applying a non-slip agent. Can be illustrated. In this case, the detachment prevention device 2
The attachment and detachment of 0 can be performed more easily.

(2) The belt body 21 is formed to have a length that grips at least one half or more of the peripheral length of the outer peripheral surface of the ring portion 8 of the release ring 7. For example, as shown in the cross-sectional view of FIG. 6A as viewed from the fitting side, the coupling fitting 1 is formed to have a length that holds two-thirds of the circumferential length of the outer peripheral surface of the ring portion 8. Can be

(3) For example, as shown in FIG. 6B and FIG.
Are formed such that the sides of the ends of the both ends 22 are parallel to each other.

(4) The detachment prevention device is a lengthwise flexible belt member formed to have a length capable of surrounding at least substantially the entire outer periphery of the ring portion 8, and one end and the other end of the belt member. And a connecting portion and a connected portion for connecting the both ends of the belt member in a state surrounding the outer periphery of the ring portion 8, and one side portion of the belt member is the operating portion 9.
And the other side of the belt body is configured to contact the distal end surface of the receiving member 3.

[0027]

According to the present invention, there is provided an excellent effect that the fire hose coupling fitting can be prevented from coming off unintentionally.

[Brief description of the drawings]

FIG. 1 is a perspective view of a fire hose coupling fitting according to an embodiment of the present invention.

FIG. 2 is a view showing a method of attaching the detachment preventing device.

FIG. 3 is a view showing another mounting method of the disengagement prevention tool.

FIG. 4 is a view showing a method of removing the detachment prevention device.

FIG. 5 is a view shown by an arrow V in FIG. 4;

FIG. 6 is a view showing a modification of the detachment preventing device.

FIG. 7 is a view showing a conventional fitting.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 connecting fitting 2 fitting 3 receiving fitting 4 hose 5 annular protrusion 6 engaging claw 7 release ring 8 ring section 9 operating section 20 detachment prevention tool 21 belt body 22 end 23 one side 24 one side 24 the other side

Claims (7)

[Claims] 1. A substantially cylindrical fitting having an engaged portion on an outer peripheral surface of an end portion, and a substantially fitting having an engaging portion on an inner peripheral surface of the end portion for removably engaging with the engaged portion. A ring-shaped portion provided on the outer peripheral surface of the engaged portion on the side opposite to the receiving bracket so as to be slidable in the lengthwise direction of the cylinder; A release ring including a protruding operation portion provided on the device, and when the operation portion is pushed and the release ring is slid toward the receiving bracket side, the ring portion displaces the engagement portion, and the A fire prevention hose release fitting configured to disengage an engagement portion and the engaged portion, wherein the fire prevention hose fitting is detachably mounted on an outer periphery of the release ring, and the operation portion receives the operation portion. A fire hose coupling fitting that is configured to be locked to a fitting. Utensils. 2. The detachment preventing device comprises a belt member formed in a substantially arc shape so as to elastically hold an outer periphery of the release ring, and one side of the belt member is on a side of a receiving bracket of an operation unit. 2. The fire hose coupling fitting according to claim 1, wherein the other side of the belt body is in contact with the distal end surface of the receiving fitting. 3. The fire hose coupling fitting according to claim 2, wherein the belt body is formed to have a length that grips at least one half or more of the circumference of the release ring. 4. The fire hose coupling fitting prevention device according to claim 3, wherein the belt body is formed to have a length to grip substantially the entire outer periphery of the release ring. 5. Both ends of the belt body are respectively provided with protrusions V
The detachment prevention tool for a fire hose coupling fitting according to any one of claims 2 to 4, which is formed in a letter shape. 6. The fire hose coupling fitting disengagement prevention tool according to claim 2, wherein both end portions of the belt body are formed so that sides of a tip end thereof are parallel to each other. 7. The belt device according to claim 7, wherein the detachment preventing member includes a belt member that is formed in a length capable of surrounding at least substantially the entire outer periphery of the ring portion, and one end and the other end of the belt member. A connecting portion for connecting the both ends of the belt body in a state surrounding the outer periphery of the ring portion, and a connected portion, wherein one side portion of the belt body is a receiving portion of the operating portion. 2. The fire hose coupling fitting prevention device according to claim 1, wherein the fitting member comes into contact with the metal fitting, and the other side of the belt body comes into contact with the distal end surface of the receiving metal fitting.