JP2002106771A - Joint for hose and intermediate joint for hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint for a hose capable of surely preventing dislodgment of the hose without a clamp for dislodgment prevention, and easily inserting and uninserting the hose to the joint and capable of being used in general purposes, and an intermediate joint for the hose for simplifying connecting operation. SOLUTION: This joint for the hose is provided with a spiral protrusion to be engaged with an inner wall part of the hose on an outer peripheral surface of the joint engaged with the hose. The joint includes all kinds of devices through which pressurizing fluid such as fuel gas or tap water is carried or a joint installed on a plumbing system or the like of the pressurizing fluid. The intermediate joint for the hose is provided with two tubular joints arranged in series for engaging each cut edge of a long hose divided in to two, and a connecting and disconnecting nut covering and fitting both of the end surfaces facing to each other of the both of the tubular joints so as to connect and disconnect both of the end surfaces facing to each other. Spiral protrusions are provided on an outer peripheral surface of a free end side of the respective tubular joint.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for connecting a watering hose to a water tap, for example, without using any kind of fasteners such as a screw-type fastening band, and in a reliable withdrawal state. The present invention relates to a hose joint and a hose intermediate joint that can be easily and quickly performed.

[0002]

2. Description of the Related Art Conventionally, for example, when fitting both ends of a gas hose into hose joints provided respectively in a gas appliance and a main valve of a gas and connecting them, gas pressure or accidental application of gas hoses is required. In order to prevent the hose from coming off due to any external force applied, a fastening tool such as a ring-shaped clip having a strong spring force or a screw-type fastening band is attached to each fitting portion.

When a watering hose is attached to a water tap, when the hose is inadvertently stepped on or the hose is bent, the water pressure rises rapidly and the hose is easily detached.
Therefore, a commercially available watering hose set is used by connecting the end of the hose to a screw-type faucet fitting that is detachably attached to a water tap.

[0004] In addition to the above, there are few cases where a hose is connected to a hose joint provided in a flow path for circulating lubricating oil to a gun for spraying compressed air or paint, or equipment such as an engine. Absent. In many cases, this type of hose joint is provided with a plurality of ring-shaped ridges at predetermined intervals on an outer peripheral surface thereof for retaining the hose.

[0005]

However, such a fastener for retaining a hose as described above requires extra cost and labor in its manufacture and installation, and it is highly preferable that it not be used. In particular, the sprinkling hose is often used to be frequently attached to and detached from the faucet. Therefore, it would be extremely convenient if a method that could be easily and reliably attached and detached without using a fastener was developed.

When a ring-shaped ridge is provided on the outer peripheral surface of the hose joint, the outer peripheral surface of the hose joint must be tapered to make the outer surface of the hose joint taper, especially in the case of a hose having poor elasticity. Becomes difficult to fit. However, if the tapered surface is used, there is a disadvantage that the function of preventing the hose from being removed is impaired.

Therefore, an object of the present invention is to provide a simple and easy-to-remove hose without using fasteners.
An object of the present invention is to provide a hose joint which can be quickly connected and which is attached to all kinds of instruments and piping systems and which has excellent versatility, and an intermediate joint for a hose which facilitates the connection operation.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, a hose joint according to the present invention provides a hose which can be easily and securely removed without using a fastener for retaining the hose.・
The hose can be quickly connected, and is characterized in that a helical ridge is provided on an outer peripheral surface of a joint for externally fitting an end of a hose so as to bite into an inner wall surface of the hose. The joint is attached to any kind of equipment or a piping system of the pressurized fluid through which a pressurized fluid such as fuel gas, tap water, lubricating oil of a machine such as an engine, compressed air, or the like flows. , A joint for connecting a hose.

The intermediate joint for a hose according to the present invention comprises:
Two tubular joints arranged in series to fit each cut end of a long hose divided into two at appropriate places, and to move the opposed end surfaces of both tubular joints toward and away from each other And a nut for contacting / separating which is fitted over the opposed end faces and is fitted on the outer peripheral surface on the free end side of each tubular joint, and provided with a spiral ridge for cutting into the inner wall surface of the hose. . Then, a spherical shell having a liquid passage hole is formed at one of the two ends of the two tubular joints which are arranged in series and opposed to each other. By forming a sliding contact curved surface capable of sliding in a liquid-tight state, the connecting portion of the two tubular joints may be bent.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Some specific examples of the present invention will be described below with reference to the drawings.
1 and 2 are explanatory views of a hose joint according to the present invention, and show a case where a main plug E provided in a gas pipe D and a gas stove F are connected via a gas hose C.

A hose joint A according to the present invention is attached to a cock 3 which is a main body of the main stopper E, on the gas outlet side.
As shown in FIG. 2, the hose joint A has a short tubular joint 1 as a main body, and a spiral ridge 2 for cutting into the inner wall surface of the hose C is provided on the outer peripheral surface thereof. I have.

The cross-sectional shape of the spiral ridge 2 is preferably formed in a saw-tooth shape with a vertical surface on the side to which the pulling force is applied, in order to enhance the action of stopping the hose C. The shape of the ridge of the spiral ridge 2 should be as sharp as possible as long as the inner wall surface of the hose C is not damaged.

The pitch and height of the spiral ridge 2 and the length of the area where the spiral ridge 2 is formed are based on the test results by trial and error, based on the outer diameter of the joint 1, the material of the hose C,
An optimal value corresponding to the internal pressure applied to the hose C or the like may be selected.

This optimum value means that once the hose C is inserted into the hose joint A, sudden external forces of the kind normally assumed, such as accidentally tripping on the hose C, as well as gas pressure, occur. Even if it is added, the minimum value is required in consideration of the safety factor so that the hose C never comes off the hose joint A.

On the other hand, cock 4 provided on gas stove F
Also, a hose joint A similar to that of the main stopper E is provided on the gas inlet side.

Next, an example of a method of connecting the hose C to the hose joint A on the main stopper E side will be described. This connection does not require any hose fasteners or the like that were conventionally required.

That is, after fitting the end of the hose C to the tip of the joint 1, the hose C is fitted to the outer peripheral surface of the joint 1 while twisting the hose C. Then, the spiral ridge 2 provided on the outer peripheral surface of the joint 1 bites into the inner wall surface of the hose C having flexibility. When the end of the hose C reaches the end of the area where the spiral ridge 2 is formed, the connection work of the hose C is completed.

However, since the gas hose C is generally made of a rubber material having high elasticity, it can be fitted into the joint 1 without applying a twisting force.

As described above, simply fitting the hose C into the joint 1 causes the hose C to move from the joint 1 not only by the gas pressure but also by an external force that inadvertently catches a foot on the hose. The risk of falling off is completely eliminated.

Considering the reason why the hose joint A having a very simple structure exhibits such a strong retaining function, as shown in FIG. It is assumed that the hose C has been pulled into the wall surface and a tensile force has been applied to pull the hose C out of the joint 1. In this case, the tensile force applied in the direction parallel to the hose C is partially
It is considered that the helical ridge 2 is deflected to the side as a component force in the twisting direction, and the tripping force is accordingly reduced.

As described above, the conventional joint in which a plurality of rows of ring-shaped ridges are provided on the outer peripheral surface of the joint has a tapered outer peripheral surface to facilitate pushing the hose into the joint as described above. It is formed in a tapered shape. Therefore, the smaller the outer diameter of the plurality of protrusions is near the tip of the joint, the weaker the locking force of the hose is.

On the other hand, the spiral ridge 2 provided on the joint 1 of the hose joint A can easily bite into the inner wall surface of the hose C with a small force as a characteristic of the spiral.
For this reason, the taper on the outer peripheral surface of the joint 1 may be kept very light or no taper may be provided at all. Therefore, a good hose locking force can be exhibited over the entire length of the spiral ridge 2.

Next, FIG. 3 shows a second embodiment of the present invention in which the tip of the water tap G into which the hose C is fitted is a hose joint A. That is, in this embodiment, the above-mentioned tip portion corresponds to the joint 1, and the spiral ridge 2 is provided on the outer peripheral surface thereof.

Next, FIG. 4 shows a third embodiment of the present invention in which a hose joint A is provided on a watering gun H. That is, the hose joint A is provided at the lower end of the handle 5 of the watering gun H. In this embodiment, the watering gun H was used.
May be replaced with an air spray gun (not shown) or the like.

Next, FIG. 5 is a longitudinal sectional view showing one embodiment of the intermediate joint for a hose according to the present invention. This hose intermediate joint B1 twists the entire long hose when the base end side of the long hose is screwed and connected to the hose joint A of the water tap G shown in FIG. 3, for example. This makes it possible to solve the problem that the screwing operation becomes difficult.

As shown in FIG. 5, the hose intermediate joint B1 of this embodiment is formed in series so as to fit each cut end of a long hose C divided into two parts at appropriate locations. The two tubular joints 11 and 12 arranged and the two tubular joints 11 and 1
O-ring 13 for maintaining watertightness
, The two opposing end faces a, b
It consists of a combination with a nut 14 for connection / separation which is externally fitted over the space.

The outer peripheral surface of each of the tubular joints 11 and 12 on the free end side is provided with a spiral ridge 2 for biting into the inner wall surface of the hose C. Further, one of the tubular joints 11 has an outward flange d protruding from a pipe end on the side of the facing end face a,
The other tubular joint 12 is provided with a male screw e on the outer peripheral surface near the opposite end surface b. Further, the outer peripheral surfaces of the tubular joints 11 and 12 are screwed into the hose C easily.
A pair of rotating handles 15, 15 are provided facing each other.

A short cylindrical nut 1 for contact and separation
On the inner peripheral surface of 4, an inward flange f to be hooked on the outward flange d is protruded at one end, and a female screw g to be screwed to the male screw e is provided at the other end.

Next, how to use the hose intermediate joint B1 will be described. First, the hose C is divided into two hoses C, C as shown in FIG. The nut 14 is rotated in the unscrewing direction to release the O-ring 13 from the state in which the O-ring 13 is sandwiched between the opposed end surfaces a and b of the tubular joints 11 and 12.

Thereafter, one end of the short hose C1 is first connected to the hose joint A of the water tap G as described above. Next, the other end of the hose C1 is screwed into the tubular joint 11 on the right side in the figure. At that time, both tubular joints 11, 12
Since the contact state through the O-ring 13 is released, the disadvantage that the longer hose C2 is twisted together with the shorter hose C1 does not occur (the tubular joint 12 spins).

After the connection of the hose C1 to the tubular joint 11 is completed, the tubular joint 12 on the left side in the figure is screwed into the proximal end of the long hose C2. At this time, the disadvantage that the tubular joint 11 rotates together does not occur. After that, the nut 14 is rotated in the screwing direction so that the two tubular joints 11 and 12 are rotated.
By sandwiching the O-ring 13 between the opposed end surfaces a and b of
The two tubular joints 11 and 12 are reliably connected in a watertight state.

Finally, a watering gun H is attached to the end of the hose C2.
Install. To do so, the hose joint A may be screwed into the tip of the hose C2 while rotating the sprinkling gun H itself.

Thus, the operation of connecting the water tap G to the base end of the long hose C and the sprinkling gun H to the tip end thereof is different from the conventional method described at the beginning, in that the hose fastener G It can be completed very easily and quickly, without using any kind, with a secure stopper.

The operation of removing the used hose C from the tap faucet G can be performed very simply and quickly by the reverse procedure of the installation.

Next, FIG. 6 shows an intermediate joint B2 for a hose as another embodiment. In this embodiment, of two tubular joints 21 and 22 arranged in series and opposed to each other, a spherical shell 23 provided with a liquid passage (gas) hole h is formed at the opposite end of one tubular joint 21. On the opposite end of the other tubular joint 22, a sliding contact curved surface 24 is formed which can be brought into sliding contact with the outer peripheral surface of the spherical shell 23 in a liquid-tight manner.

Further, a retaining cylinder 25 for retaining the spherical shell 23 is interposed in a gap provided between the contact / separation nut 14 and the other tubular joint 22. A male screw i to be screwed into the female screw g of the nut 14 for connection and separation is provided at one end of the outer peripheral surface of the stopper cylinder 25, and the other end of the inner peripheral surface can be slidably contacted with the spherical shell 23. A hooking curved surface 25a protrudes.

A feature of the hose intermediate joint B2 of this embodiment having a configuration similar to a "ball joint" is that the connecting portion of the two tubular joints 21 and 22 can be bent if necessary. is there. As a result, various usage situations can be widely supported.

Next, FIG. 7 shows another embodiment.
The intermediate joint for hose B3 is shown. The intermediate joint B3 for a hose has an inner spherical shell body provided with a liquid passage hole (not shown) at an opposite end of one pipe joint 31 of a pair of tubular joints 31 and 32 opposed in series. At the opposite end of the other tubular joint 32, liquid (gas) is applied to the outer peripheral surface of the inner spherical shell 33.
An outer spherical shell 34 for tight sliding contact is integrally formed.

Since it is necessary to assemble the intermediate joint B3 for the hose, the tubular joint 32 and the outer spherical shell 34 are divided into two parts in the respective radial directions, and each half thereof is formed by using a screw / nut or the like. Are united.

The description of each of the above embodiments is limited to the case where the gas appliance and the main plug of the gas pipe are connected with a hose, and the case where a watering hose with a watering gun is attached to the water tap.
However, the hose joint according to the present invention can be fully attached to all kinds of instruments and pipes to which the hose is connected, so that the above-described excellent functions can be sufficiently exerted.

[0041]

As is clear from the above description, if the hose joint and the hose intermediate joint according to the present invention are used,
Practical superior effects as listed below can be obtained. (A) Unlike the conventional case, the hose can be reliably prevented from being pulled out simply by fitting it into the joint without using any kind of hose fasteners. (B) Since the fastener is not required, the manufacturing cost, installation and storage time can be reduced. (C) Do not force the hose into the fitting,
As it is screwed in, it can be easily fitted into the joint with less force. (D) If the hose is long, if an intermediate joint for a hose is interposed between the hoses, the entire hose does not need to be twisted, so that the connection work is not hindered. (E) If the hose intermediate joint has a "ball joint" -like structure, the joint can be bent to an arbitrary angle as required, so that the usability is further improved. (F) The hose coupling is extremely versatile, being attached to all types of equipment and piping systems that require hose connection.

[Brief description of the drawings]

FIG. 1 shows a first embodiment in which the present invention is applied to a case where a gas stove and a gas main plug are connected via a hose, and is a sketch of a connected state.

FIG. 2 is a partially broken front view showing the vicinity of the gas main plug according to the first embodiment.

FIG. 3 is a side view of a water tap according to a second embodiment in which the present invention is applied to a case where a watering hose is connected to a water tap;

FIG. 4 is a side view of the watering gun attached to the tip of the watering hose.

FIG. 5 is a longitudinal sectional view showing one embodiment of an intermediate joint for a hose according to the present invention.

FIG. 6 is a partially broken side view showing another embodiment of the intermediate joint for a hose.

FIG. 7 shows yet another embodiment of an intermediate joint for a hose.
It is a perspective view.

[Explanation of symbols]

 A Hose joint B1, B2, B3 Hose intermediate joint C Hose D Gas pipe E Gas main tap F Gas stove G Water tap H Sprinkling gun 1 Joint 2 Spiral ridge 3, 4 Cock 5 Handle 11, 12 Tubular joint 13 O Ring 14 Nut for contact / separation 15 Rotation handle 21, 22, 31, 32 Tubular joint 23 Spherical shell 24 Sliding contact surface 25 Locking cylinder 25 a Hook curved surface 33 Inner spherical shell 34 Outer spherical shell

Claims (4)

[Claims] 1. A joint for easily and quickly connecting a hose in a reliable withdrawal state without using fasteners for retaining the hose, wherein the end of the hose is externally fitted. A hose joint characterized in that a spiral ridge is formed on an outer peripheral surface of the hose so as to bite into an inner wall surface of the hose. 2. The joint is used for all kinds of equipment and a piping system of a pressurized fluid through which a pressurized fluid such as fuel gas, tap water, lubricating oil of a machine such as an engine, and compressed air flows. The joint for a hose according to claim 1, wherein the joint is attached to connect a hose. 3. A long hose divided into two at an appropriate position, two tubular joints arranged in series for fitting each cut end to the outside, and opposing end surfaces of both tubular joints are connected to each other. In order to disengage, a connecting and disengaging nut that is fitted over and straddled between the opposing end surfaces is provided. An intermediate joint for a hose, characterized by being provided. 4. A spherical shell having a liquid passage hole formed at one opposing end of two tubular joints arranged in series and opposed to each other, and the spherical shell at the other opposing end. 4. The intermediate joint for a hose according to claim 3, wherein a connecting portion of the two tubular joints is made refractible by forming a sliding contact curved surface capable of sliding in an airtight state on the outer peripheral surface.