JP3425528B2 - Hose connection device - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a hose connecting device such as a fire hose and a canvas hose for civil engineering.

[0002]

2. Description of the Related Art For example, hose connecting fittings for connecting fire hoses are disclosed in, for example, Japanese Utility Model Publication No. 63-37593, Japanese Utility Model Publication No. 64-53593, Japanese Utility Model Publication No. 2-345.
No. 49, Japanese Utility Model Publication No. 59-193443, and the like.

In these publications, an operating ring is rotatably fitted to an outer cylinder of a pair of joint cylinders, a pair of locking claws and wedge ridges are provided on the operating ring, and the operating ring is rotated. , The joint cylinder is coupled by locking the locking claw of one operating ring to the wedge protrusion of the other operating ring. Alternatively, the male metal fitting and the female metal fitting are provided, the male metal fitting is provided with a locking projection, the female metal fitting is provided with a locking claw for locking with the locking projection, and the male metal fitting and the female metal fitting are axially butted. Thus, the locking projection and the locking claw are locked to couple the male fitting and the female fitting.

[0004]

The above-mentioned conventional hose connecting fittings are both cumbersome to connect and disconnect, and are large and heavy so that they are difficult to carry and handle.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a hose connecting device which is easy to connect and disconnect, is small and lightweight, and is easy to carry and handle. To do.

[0006]

To achieve the above object, the present invention provides a flexible first hose and a second hose having a lining layer on the inner surface of a reinforcing layer. In a hose connecting device for connecting each other, the outer peripheral surface has a taper portion that has a large diameter toward the end portion of the first hose, and the end portion is turned inside out of the inside-out portion of the first hose. An inner ring to be fitted, and an inner peripheral surface having a taper portion having a smaller diameter toward the end of the second hose, and fitted to the inner ring in a state fitted to the outside of the second hose. And an outer ring, and the lining layers of the first hose and the second hose are connected in a state of being in close contact with each other.

A second aspect of the present invention is characterized in that the taper portion of the first aspect is provided with a shift preventing groove. A third aspect of the present invention is characterized in that the shift prevention groove of the second aspect is a spiral groove.

A fourth aspect of the present invention is characterized in that the outer ring of the first aspect is provided with a locking ring for the inner ring. A fifth aspect of the present invention is characterized in that the inner ring and the outer ring of the first aspect are formed of a biodegradable polymer.

According to a sixth aspect of the present invention, there is provided a connecting structure for connecting a flexible hose having a lining layer on the inner surface of a reinforcing layer and a mouthpiece, wherein the outer peripheral surface has a larger diameter toward the opposite end of the hose. Has a tapered portion, and the tapered portion has a mouthpiece into which the hose is fitted, and an inner peripheral surface has a tapered portion having a smaller diameter toward the end portion of the hose, and is fitted to the outside of the hose. In this state, the outer ring is fitted into the tapered portion of the base and connects the hose and the base.

A seventh aspect of the present invention is characterized in that the base of the sixth aspect is provided with a locking ring for the outer ring.

According to an eighth aspect of the present invention, in a connecting structure for connecting a flexible hose having a lining layer on the inner surface of a reinforcing layer and a mouthpiece, the inner peripheral surface has a smaller diameter toward the end opposite to the end portion of the hose. A mouthpiece having a taper portion, and a taper portion having a large diameter toward the end of the hose on the outer peripheral surface, and the inside is fitted inside the inside-out part of the hose whose end is turned inside out, It is characterized in that an inner ring for connecting the hose and the mouthpiece is provided by closely adhering the inside out portion of the hose to the tapered portion of the mouthpiece.

A ninth aspect of the present invention is characterized in that the cap of the eighth aspect is provided with a locking ring for the inner ring.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a first embodiment.
FIG. 1 is a semi-longitudinal side view of a hose connecting device, and FIG. 2 is an explanatory view showing a hose connecting procedure.

In the figure, 1 is a first hose as a fire hose, and 2 is a second hose. First and second
The hoses 1 and 2 have flexibility because a lining layer 4 made of rubber or synthetic resin is provided on the inner surface of the jacket layer 3 as a reinforcing layer.

The end of the first hose 1 is turned upside down,
An inner ring 6 is fitted inside the inside-out portion 5. The inner ring 6 is made of metal or synthetic resin, the inner peripheral surface is a flat surface, and the outer peripheral surface has a taper portion 7 having a large diameter toward the end portion of the first hose 1. A shift prevention groove 8 having a saw-tooth cross section is formed in the.

An end of the second hose 2 is fitted to the inside-out portion 5 of the first hose 1, and an outer ring 9 is fitted to the outside of the second hose 2. The outer ring 9 is made of metal or synthetic resin, the outer peripheral surface is a flat surface, and the inner peripheral surface has a taper portion 10 having a smaller diameter toward the end portion of the second hose 2.
The taper portion 10 is formed with a shift preventing groove 11 having a saw-tooth cross section.

Therefore, the taper portion 7 of the outer peripheral surface of the inner ring 6
And the taper portion 10 on the inner peripheral surface of the outer ring 9 are inclined in the same direction and at the same angle, and the distance between the taper portion 7 and the taper portion 9 is such that when the first and second hoses 1 and 2 are overlapped with each other. The inner ring 6 and the outer ring 9 can sandwich the first and second hoses 1 and 2 from each other.

Next, the procedure for connecting the first hose 1 and the second hose 2 using the hose connecting device configured as described above will be described. First, as shown in FIG. 2 (a). , An inner ring 6 and an outer ring 9 at the end of the first hose 1.
Mating. Next, as shown in FIG. 2B, the end portion of the first hose 1 is turned upside down to form an inside-out portion 5 with the lining layer 4 on the front side.

Next, as shown in FIG. 1C, the end portion of the second hose 2 is fitted into the inside-out portion 5 of the first hose 1,
The lining layers 4 are superposed on each other. Next, FIG.
As shown in, the inner ring 6 is slid to insert the inner ring 6 into the inside-out portion 5. Next, as shown in FIG. 7E, the outer ring 9 is slid and fitted to the outer side of the inner ring 6 via the first and second hoses 1 and 2.

In this state, when the outer ring 9 is deeply fitted to the inner ring 6, the tapered portion 7 of the inner ring 6 and the tapered portion 10 of the outer ring 9 cause the first and second hoses 1 and 2 to overlap each other. Is pinched. At this time, the ridges that form the deviation preventing groove 8 of the inner ring 6 and the deviation preventing groove 11 of the outer ring 9 bite into the jacket layers 3 of the first and second hoses 1 and 2, and the inner ring 6 and the outer ring 9 Prevent slippage,
The inner hose 1 and the second hose 1 by the inner ring 6 and the outer ring 9.
The hose 2 of can be firmly connected.

That is, when a tensile force is applied to the first and second hoses 1 and 2, the maximum diameter portion of the tapered portion 7 of the inner ring 6 and the minimum diameter portion of the tapered portion 10 of the outer ring 9 approach each other. , The first and second hoses 1 and 2 act in the tightening direction. In addition, even if a force is applied to the first and second hoses 1 and 2 in a direction of axially compressing the first and second hoses 1 and 2,
Is flexible, no force is applied to the inner ring 6 and the outer ring 9 in the axially compressing direction.
The outer ring 9 and the outer ring 9 are not separated.

Further, since the inner ring 6 has a thin and flat cross-section, the amount of protrusion inside the hose is small.
The fluid flow resistance is small and the pressure loss is small. Furthermore, since the outer ring 9 also has a thin and flat cross section, the amount of protrusion to the outside of the hose is small, so that there is an effect that there is little catching when the hose is dragged.

In the first embodiment, the shift preventing groove 11 having a saw-tooth cross section is formed in the tapered portion 10 of the outer ring 9. However, the shift preventing groove 11 is formed into a spiral groove, so that the outer ring 9 is formed. Can be tightened while screwing in, and can be fixed more firmly. Furthermore, by forming the first and second hoses 1 and 2 and the inner ring 6 and the outer ring 9 from a biodegradable polymer, even if a fire hose used in a forest fire is left on the mountain, it will be decomposed naturally. Therefore, it can be discarded as it is.

The biodegradable polymer is, for example, a microbial biopol (trade name of Japan Monsanto Co., Ltd.) and has a composition of a copolymer of hydroxybutyrate and valilate, or a chemically synthesized bionore (trade name of Showa High Polymer Co., Ltd.). The composition thereof is an aliphatic polyester, a polyester of succinic acid and butanediol / ethylene glycol, and the like, and is a polymer that is decomposed by the action of biochemical substances such as bacteria and enzymes. That is, when it is immersed in a river, lake, ground, or muddy water containing microorganisms and left for several days to several weeks, it mainly decomposes into carbon dioxide and water.

FIG. 3 shows a second embodiment, for example, showing a connecting structure between a hose 12 as a fire hose and a base 15. The hose 12 is flexible because a lining layer 14 made of rubber or synthetic resin is provided on the inner surface of a jacket layer 13 as a reinforcing layer.

The base 15 is made of metal or synthetic resin,
A first male screw portion 16 and a second male screw portion 17 are provided at this tip portion. On the outer peripheral surface of the base end portion of the mouthpiece 15, a tapered portion 18 having a large diameter in the direction opposite to the end portion of the hose 12 is formed. An outer ring 20 is fitted on the end of the hose 12. The outer ring 20 is made of metal or synthetic resin, the outer peripheral surface is a flat surface, and the inner peripheral surface has a taper portion 2 having a smaller diameter toward the end of the hose 12.
1 and the taper portion 21 has a serrated shift groove 2
2 is formed.

Therefore, the tapered portion 18 of the outer peripheral surface of the base 15 is provided.
And the taper portion 21 on the inner peripheral surface of the outer ring 20 are inclined in the same direction and at the same angle, and the interval between the taper portion 18 and the taper portion 21 is slightly smaller than the wall thickness of the hose 12,
The hose 12 can be clamped by 8 and the tapered portion 21.

Further, the nozzle 23 is screwed into the first male screw portion 16 of the base 15, and the loosening prevention ring 24 abutting against the end of the outer ring 20 is screwed into the second male screw portion 17. .

Therefore, when a tensile force is applied to the connecting portion between the hose 12 and the base 15, the shift prevention groove 2 of the outer ring 20 is prevented.
2 penetrates into the jacket layer 13 of the hose 12 and the outer ring 20 and the hose 12 are integrated with each other, and the maximum diameter portion of the tapered portion 18 of the mouthpiece 15 and the minimum diameter portion of the tapered portion 21 of the outer ring 20 approach each other. Then, the hose 12 acts and is fixed in the tightening direction, and the lining layer 14 of the hose 12
And the outer peripheral taper portion 18 of the base 15 are brought into close contact with each other to be watertight. Further, even if a force is applied to the hose 12 in a direction of axially compressing the hose 12, the hose 12 has flexibility, so that the base 15
No force is applied to the outer ring 20 in the axially compressing direction, and the base 15 and the outer ring 20 are not separated from each other.

FIG. 4 shows a third embodiment, for example, showing a connecting structure between a hose 12 as a fire hose and a base 25. The hose 12 is flexible because a lining layer 14 made of rubber or synthetic resin is provided on the inner surface of a jacket layer 13 as a reinforcing layer.

The base 25 is made of metal or synthetic resin,
On the inner peripheral surface of this tip portion, the first female screw portion 26 and the second female screw portion 26
An internal thread portion 27 is provided. On the outer peripheral surface of the base end portion of the mouthpiece 25, a taper portion 28 having a smaller diameter in the direction opposite to the end portion of the hose 12 is formed.

The end portion of the hose 12 is turned upside down, and the inner ring 31 is fitted inside the turning portion 30. The inner ring 31 is made of metal or synthetic resin,
The inner peripheral surface is a flat surface, and the outer peripheral surface has a tapered portion 32 having a larger diameter toward the end of the hose 12.
A saw-tooth-shaped shift prevention groove 33 is formed in.

A taper portion 28 of the cap 25 is fitted to the inside-out portion 30 of the hose 12. Therefore, the inner ring 31
The taper portion 32 on the outer peripheral surface of the and the taper portion 28 on the inner peripheral surface of the base 25 are inclined at the same angle in the same direction.
The distance between the taper portion 8 and the tapered portion 32 is slightly smaller than the wall thickness of the hose 12, and the hose 12 can be held by the inner ring 31 and the tapered portion 28 of the base 25.

Further, the nozzle 23 is screwed into the first female thread portion 26 of the base 25, and the second female thread portion 27 comes into contact with the end portion of the inner ring 31 via the hose 12 to prevent loosening. Is screwed in.

Therefore, when a tensile force is applied to the connecting portion between the hose 12 and the base 25, the shift prevention groove 3 of the inner ring 31 is prevented.
3 penetrates into the jacket layer 13 of the hose 12 and the inner ring 31 and the hose 12 are integrated with each other, the minimum diameter portion of the tapered portion 28 of the mouthpiece 25 and the maximum diameter portion of the tapered portion 32 of the inner ring 31 approach each other. The hose 12 acts and is fixed in the tightening direction, and is water-tight by the close contact between the lining layer 14 of the hose 12 and the inner peripheral surface taper 28 of the mouthpiece. Also,
Even if a force is applied to the hose 12 in the axial compression direction,
Since the hose 12 has flexibility, no force is applied to the mouthpiece 25 and the inner ring 32 in the axially compressing direction,
The base 25 and the inner ring 32 are not separated.

FIG. 5 shows a fourth embodiment, and the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, the locking ring 35 for the inner ring 6 is provided on the outer ring 9 of the first embodiment. The loosening prevention ring 35 has an arcuate inner peripheral surface 35a having a diameter smaller than the outer diameter of the inner ring 6, and the outer peripheral surface 35b is formed on the inner peripheral surface of the outer ring 9 so that it can be screwed with the screw portion 36. Screw part 3
7 and a ridge portion 38 are provided. The ridge portion 38 is provided with one or a plurality of engaging holes 39 for engaging with a rotary wrench (not shown) that rotates the locking ring 35.

The loosening prevention ring 35 is fitted in the second hose 2 in advance, and the inner ring 6 is fitted in the same manner as in the first embodiment.
The outer ring 9 and the first hose 1 and the second hose 2
And connect. Finally, the loosening prevention ring 35 is displaced toward the first hose 1 and the male screw portion 37 is screwed into the female screw portion 36 of the outer ring 9. At this time, attach the rotary wrench to the engaging hole 3
9, the locking ring 35 can be rotated, and by tightening the locking ring 35, the inner peripheral surface 35a presses the inner ring 6 via the first hose 1 and the second hose 2. However, the looseness of the inner ring 6 can be prevented.

Although the fire hose has been described in each of the above embodiments, the present invention can be applied to any hose such as a canvas hose for civil engineering.

[0040]

As described above, according to the first aspect of the present invention, the structure is simple and the weight can be reduced, so that it can be easily carried and handled, and connection and disconnection can be facilitated. Furthermore, the lining layers of the first hose and the second hose can be brought into close contact with each other, and reliable sealing can be achieved.

According to the second aspect, the first and second hoses are not separated even if a tensile force is applied, and according to the third aspect, the outer ring can be screwed and firmly tightened. According to the fourth aspect, the loosening prevention ring can prevent the inner ring from loosening and can be firmly coupled. According to claim 5, since it is formed of a biodegradable polymer, it is possible to save the trouble of recovery after use in the case of a forest fire, and unlike incineration, there is no fear of generating toxic gas and the global environment. It can solve social problems such as pollution and global warming.

According to the sixth to ninth aspects, the hose and the mouthpiece can be firmly connected with a simple connecting structure, and the mouthpiece can be reduced in size and weight, and the same effect as the first aspect can be obtained.

[Brief description of drawings]

FIG. 1 is a semi-longitudinal side view of a hose connection structure showing a first embodiment of the present invention.

FIG. 2 is an operation explanatory view of the same embodiment.

FIG. 3 is a semi-longitudinal side view of a hose connection structure showing a second embodiment of the present invention.

FIG. 4 is a semi-longitudinal side view of a hose connection structure showing a third embodiment of the present invention.

FIG. 5 is a semi-longitudinal side view of a hose connection structure showing a fourth embodiment of the present invention.

[Explanation of symbols]

1,2 ... hose 3 ... Jacket 4 ... Lining layer 5 ... Inside out 6 ... Inner ring 9 ... Outer ring 7, 10 ... Tapered part 8, 11 ... Anti-slip groove

Claims (9)

(57) [Claims] 1. A hose connecting device for connecting a flexible first hose and a second hose having a lining layer on the inner surface of a reinforcing layer, wherein an outer peripheral surface is at an end of the first hose. The inner ring has a tapered portion with a large diameter toward the inside and is fitted into the inside of the inside-out portion of the first hose whose end portion is turned outside,
Has a taper that becomes smaller toward the end of the hose,
An outer ring fitted to the inner ring in a state of being fitted to the outer side of the second hose;
The hose connecting device characterized in that the lining layers of the hose are connected to each other in a state of being in close contact with each other. 2. The hose connecting device according to claim 1, wherein the taper portion is provided with a shift preventing groove. 3. The hose connecting device according to claim 2, wherein the shift prevention groove is a spiral groove. 4. The outer ring is provided with a locking ring for the inner ring.
Hose connection device described. 5. The hose connecting device according to claim 1, wherein the inner ring and the outer ring are formed of a biodegradable polymer. 6. A connecting structure for connecting a flexible hose having a lining layer on an inner surface of a reinforcing layer and a mouthpiece, wherein an outer peripheral surface has a taper portion having a large diameter in a direction opposite to an end portion of the hose. A mouthpiece into which the hose is fitted, and a taper portion whose inner peripheral surface has a smaller diameter toward the end portion of the hose, and which is fitted to the outside of the hose. A connecting structure comprising an outer ring fitted to a tapered portion of a base and connecting the hose and the base. 7. The connection structure according to claim 6, wherein the base is provided with a locking ring for the outer ring. 8. A connecting structure for connecting a flexible hose having a lining layer on the inner surface of a reinforcing layer and a mouthpiece, wherein the inner peripheral surface is tapered toward the opposite end of the hose. And a taper portion of the mouthpiece which is fitted inside the inside of the inside-out portion of the hose having an end portion turned inside out and has a taper portion having a large diameter on the outer peripheral surface toward the end portion of the hose. A connection structure comprising: an inner ring that connects the inside-out portion of the hose to the portion to connect the hose and the cap. 9. The connection structure according to claim 8, wherein a locking ring for the inner ring is provided on the base.