JPS6028863Y2 - gas hose connection - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a gas hose connection device, and more specifically to a gas hose connection device that is directly attached to the hose end of a gas main valve and connected to a socket of a gas appliance. .

[Background technology]

Conventionally, with this type of gas hose connector, the hose end is press-fitted into the rear part of the joint cylinder of the gas hose connector, and the gas connection to the hose end is made only by the elastic force of the cylindrical packing installed inside the rear part of the joint cylinder. The equipment was fixed.

For this reason, there is a drawback that the gas connector may come off due to unexpected external force.

In addition, although the hose end is not connected by being inserted into a socket, a method such as that disclosed in Japanese Utility Model Application Publication No. 52-38719 has been proposed as a device that press-fits the hose end into the joint cylinder to prevent the hose end from coming off. ing.

In this case, as shown in Fig. 11, the joint tube 1'
A packing 31' is installed inside, and a fixture 3' is installed in a through hole 2' provided through the joint tube 1' so as to be movable in the inward and outward directions.
A cover ring 4 that is slidable in the axial direction on the outer periphery of the joint tube 1'
The cover ring 4' is biased by a spring S so that the fixture pressing part of the cover ring 4' is positioned on the outer periphery of the fixture 3'. When the hose end 9' is press-fitted, the fixture 3' locks into the groove on the outer periphery of the hose end 9' and holds the hose end 9' so that it does not come off. When the fixture pressing part is separated from the outer periphery of the fixture 3' to release the pressure on the fixture 3' and the hose end 9' is pulled, the hose end 9
' is now omitted.

In such a conventional example, the hose end 9' is connected to the joint tube 1.
When the hose end 9' is inserted into the hose end 9', the fixing device 3' is engaged with the groove on the outer periphery of the hose end 9', and the cover ring 4' is attached to the fixing device 3.
The hose end 9' is prevented from being removed by a fixture 3' by pressing the outer periphery of the hose end 9', but there is a slidable cover ring 4' that holds the fixture 3' in place on the hose end 9'. The cover ring 4 is only biased in the axial direction by the spring S.
An unexpected external force acts on ′, and the cover ring 4 resists the spring S.
′ slides, the holding of the fixture 3′ is released and the fixture 3
There was a risk that an accident could occur in which the hose end 9' would become unlatched and the hose end 9' would come off.

[Purpose of invention]

This invention was developed in view of the above points, and its main purpose is to provide a gas hose connector that can be easily locked to the hose end, securely connected to the hose end, and highly effective in preventing disconnection. is to provide.

[Disclosure of invention]

(Structure) The gas hose connector of the present invention is provided with a cylindrical insertion portion 7 that can be inserted into a socket 6 at the front end of the cylindrical joint tube 1, and a main stopper 8 at the rear end of the joint tube 1. A cylindrical fitting part 10 is provided to be fitted and connected to the hose end 9, and a through hole 2 bored inside and outside the rear end of the coupling tube 1 has a radius of the coupling tube 1. A cylindrical cover ring 4 is fitted on the outer periphery of the joint tube 1 so as to be slidable along the axial direction of the joint tube 1. Cover ring 4 corresponding to hole 2
A convex portion 14 for pressing the fixture 3 is provided on the rear inner periphery of the cover ring 4, and the head of the outer periphery of the joint cylinder 1 of the fixture 3 is connected to the convex portion 14 rearwardly from the convex portion 14 of the cover ring 4. A recessed step 15 is provided on the outer periphery of the joint cylinder 1, and a spring is provided at a position facing the inner periphery of the front end of the cover ring 4 on the outer periphery of the joint tube 1, which is movable in the radial direction and can be moved back and forth in the radial direction. A biased stopper 20 is provided, and the joint tube 1 of the stopper 20
A recessed step 22 in which the front part of the cover ring 4 can fit is provided on the rear outer periphery integrally connected to the stopper 20 , and a protrusion 21 that protrudes toward the outer periphery is provided on the front outer periphery of the stopper 20 .
A step portion 25 is provided between the recessed step portion 20 and the step portion 25 on which the front end surface of the cover ring 4 comes into contact, and the step portion 25 of the stopper 20
5 to the hole edge on the rear side of the through hole 2 and the distance from the front end surface of the cover ring 4 to the rear end of the convex portion 14 are made approximately equal, and the height of the stepped portion 25 of the stopper 20 is set to
0 is pressed toward the inner circumference, the outer circumference of the protrusion 21 is set at a height that is located between the inner circumferential surface of the cover ring 4 and the road surface, or inward from the inner circumferential surface. There it is,
By configuring as described above, the drawbacks of the conventional example are solved.

That is, a stopper 20 is provided that can move forward and backward in the radial direction and is biased outward in the radial direction by a spring, and when the cover ring 4 moves rearward, the front part of the cover ring 4 fits into the recessed step 22 on the rear outer periphery of the stopper 20. At the same time, the front end surface of the cover ring 4 is brought into contact with the stepped part 25 on the front outer periphery of the stopper 20, so that the hose end 9 is inserted into the joint tube 1 and the fixture 3 is inserted into the trough part on the outer periphery of the hose end 9. This prevents the cover ring 4, which presses the fixture 3 when it is locked, from moving due to unexpected external force.

In other words, the pressure applied by the cover ring 4 is not released unless the cover ring 4 is moved in the axial direction while pressing the stopper 20 in the inner circumferential direction. (It is impossible for two forces to act at the same time), and an unexpected external force can cause the fixture 3 to
This prevents the lock from coming off.

(Example) The present invention will be described in detail below based on examples.

As shown in FIGS. 1, 2, and 3, the gas hose connector A of the present invention is housed in a cylindrical joint tube 1 and a through hole 2 bored at the rear end of the joint tube 1. A fixture 3 that can move forward and backward in the radial direction of the joint tube 1, a cylindrical cover ring 4 that is slidably fitted on the outer periphery of the joint tube 1 along the axial direction, and a front end of the cover ring 4 that faces the front end thereof. A stopper 2 is disposed on the outer periphery of the joint cylinder 1 at a position where the stopper 2 is biased radially outwardly by a spring.
It consists of 0.

As shown in FIGS. 2, 3, and 4, the coupling tube 1 has a cylindrical small-diameter insertion portion 7 at one end that is inserted into a socket 6 at the tip of a hose 5 extending from a gas appliance. A joint cylinder main body 1a having a cylindrical large diameter fitting part 10 which is fitted and connected to a hose end 9 on the side of a main stopper 8 at the other end, and a fitting part 1.
0 and an auxiliary cylinder 1b connected to the end of the cylinder.

The joint cylinder main body 1a and the auxiliary cylinder 1b are both molded from hard synthetic resin such as Duracon, and the auxiliary cylinder 1b is attached to the fitted part 10.
The joint tube 1 is assembled by forcibly fitting or screwing.

The fixing device 3 is composed of two steel balls 3aw3a, and is housed in a through hole 2 that penetrates in the radial direction formed in the rear end of the joint tube 1, that is, the peripheral wall of the auxiliary tube 1b, and its total length is is longer than the wall thickness of the auxiliary cylinder 1b, and when it is pushed deeply into the joint cylinder 1, the inner steel ball 3a comes into contact with the constriction on the outer peripheral surface of the hose end 9 inserted into the fitted part 10, and the hose The end 9 is captured within the fitted portion 10.

Note that the fixing device 3 is not limited to the above-mentioned steel ball 3a, but may be an elongated fixing pin 3b as shown in FIG. 10, for example.
It is also possible.

The cover ring 4 is the rear part of the joint tube 1, that is, the fitted part 1
0 and the auxiliary cylinder 1b so as to be slidable along the axial direction, and the covering front cylinder 4a is formed of polyamide resin or the like and metal such as brass. It is constructed by connecting the cover ring to the rear cylinder 4b formed of a material, and the retaining ring 28 housed in the groove 27 on the inner peripheral surface of the cover ring front cylinder 4a locks the outer periphery of the joint cylinder 1 in order to prevent forward displacement. It is prevented by fitting into the groove 26, and backward displacement is prevented by the front end end surface 30a of the covering front cylinder 4a coming into contact with the end surface 30b of the joint cylinder main body 1a, so that removal is prevented. It is slidable along the axial direction within a certain range in the front and rear.

On the inner circumferential surface of the rear end of the cover ring 4, that is, on the inner circumferential surface of the rear end of the cover ring rear cylinder 4b, there is a convex portion 14 for pressing the head of the fixture 3, and a rear end edge from the convex portion 14 is provided. The stepped portion 15 that accommodates the head of the outer periphery of the joint tube 1 of the fixture 3 is formed to be recessed in the outer periphery, and the cover ring 4 is moved rearward as shown in FIGS. 3 and 4. Sometimes, the convex part 1
4, press the fixture 3 to push the fixture 3 into the joint tube 1, and the tip of the fixture 3 comes into pressure contact with the outer periphery of the hose end 9 inserted into the fitted part 10, and the hose end 9 is inserted into the joint tube 1. When the cover ring 4 slides forward and the stepped portion 15 corresponds to the head of the fixture 3 as shown in Fig. 2, it is released from the pressing force from the convex portion 14 and is fixed. The tool 3 becomes movable radially outward, the pressure contact with the hose end 9 is released, and the hose end 9 can be freely extracted from the joint tube 1.

In addition, the above-mentioned through hole 2, fixture 3, convex part 14 and step part 15
A plurality of sets are provided along the circumferential direction on the joint tube 1 and the cover ring 4, respectively, and the hose end 9 is held at several locations on the circumference by the fixtures 3.

The stoppers 20 are provided at two diametrically opposed locations on the outer periphery of the joint tube 1, and are integrally formed with the joint tube main body 1a by simultaneous molding.

That is, as shown in FIG. 5, each stopper 20 is formed in a band shape approximately parallel to the axial direction and spaced from the outer periphery of the joint cylinder main body 1a in front of the outer end of the base 29 that protrudes from the rear end of the joint cylinder main body 1a. When the stopper 20 is pressed against the joint body 1a and deformed due to this shape,
Using the base 29 as a fulcrum, it attempts to return in the opposite direction, that is, radially outward, by an elastic restoring force.

A protrusion 21 protrudes from the front outer surface of the stopper 20, forming a recessed step 22 on the rear outer surface, and a lead portion 23 further protrudes from the front outer surface of the protrusion 21.

At this time, the distance from the step 25 between the protrusion 21 and the recessed step 22 of the stopper 20 to the hole edge on the rear side of the through hole 2 and the front end surface of the cover ring 4 [in the embodiment, the front end of the cover ring 4] The distance from the bottom edge of the cutout window 24 of the part to the rear end of the protrusion 14 is approximately equal, and the height of the stepped part 25 of the stopper 20 is such that when the stopper 20 is pressed toward the inner circumference, the protrusion 21
The outer periphery of the cover ring 4 is set at a height that is between the inner circumferential surface of the cover ring 4 and the road surface, or located inward from the inner circumferential surface.

In addition, cutout windows 24 are provided at two locations on the front end of the cover ring 4 corresponding to each stopper 20, and the joint tube 1
When the cover ring 4 to be fitted on moves backward and pushes the fixture 3 inward with the convex part 14 on the inner periphery of the rear end, the third
As shown in the figure, each cutout window 24 has a lead part 23 and a protrusion 21.
is fitted, the bottom edge of the cutout window 24 is locked to the step 25 formed between the protrusion 21 and the recessed step 22, and the forward movement of the cover ring 4 is blocked, and the hose end 9 is fixed to the fixture 3. It is held in a fixed state within the joint tube 1.

When removing the hose end 9, press the lead part 23 to push the stopper 20 inward against the spring force.
After the bottom edge of the notch window 24 is disengaged from the stepped part 25, the inner circumferential surface of the cover ring 4 rearward from the notch window 24 is moved to the protrusion 2.
1, move the covering ring 4 forward,
As shown in FIG. 2, the protrusion 14 is removed from the head of the fixture 3 to release the pressing force on the fixture 3.

In the figure, 31 is a cylindrical packing made of an elastic rubber material such as NBR, which is disposed on the inner periphery of the fitted part 10 of the joint cylinder 1, and is closely attached to the outer periphery of the hose end 9 inserted into the fitted part 10. A cylindrical receiver molded from a hard synthetic resin such as Duracon, which is fitted onto the inner periphery of the joint cylinder main body 1a, is arranged between the tool 32 and the auxiliary cylinder 1b.

A collar piece 33 is provided protruding from the inner circumferential surface of the receiver 32, and
The rear part of the receiver 32 is a large diameter part into which the hose end 9 is inserted.

Reference numeral 35 denotes a valve, which is integrally constructed with a valve packing 37 provided on a valve seat 36. This valve 35 is arranged in the joint cylinder main body la, and the receiver is connected to the flange piece 33 of the fitting 32 and the valve seat 36. It is slidable by a valve spring 40 disposed between the valve spring 40 and the recess 38 of the valve 35, so that when the valve gasket 37 of the valve 35 comes into contact with the valve seat 41 of the joint cylinder 1, the gas flow is blocked. It has become.

Reference numeral 34 denotes a gas distribution groove bored from the vicinity of the valve seat 41 to the vicinity of the receiver 32, so that gas flows through the gas distribution groove 34 when the valve 35 is opened.

43 in the figure is a safety cap for protecting the insertion portion 7 of the joint tube 1 when the socket 6 is not connected to the joint tube 1.

Connect the gas hose connector A configured in this way to the main valve 8.
To attach the cover ring 4 to the hose end 9 of the hose end 9, as shown in FIG.
After inserting the hose end 9 into the tube and inserting approximately the entire length of the hose end 9 into the joint cylinder 1, slide the cover ring 4 over the fixture 3, and as shown in FIG.
The hose end 9 is pushed inward by the convex portion 14, and the fixture 3 is brought into pressure contact with the constriction on the outer periphery of the hose end 9 to capture the hose end 9 in the joint tube 1. The stopper 20 pops out due to the spring return force, and the bottom edge of the cutout window 24 is locked to the stepped portion 25 at the rear end of the rear portion 21, thereby preventing the cover ring 4 from moving forward. Thus, the fixed state of the hose end 9 by the fixture 3 is maintained, and the hose end 9 is prevented from coming off.

When the joint tube 1 is attached to the hose end 9, the cylindrical packing 31 is compressed between the inner wall of the joint body 1a and the outer periphery of the hose end 9, and the joint tube 1 and the hose end 9 are placed in a compressed state. This completely prevents gas leakage between the

Furthermore, when the gas hose connector A of the present invention is used at the hose end of a gas main valve 8 equipped with a sliding valve 45 that opens and closes with a spring as shown in FIGS. 1, 3, and 9, The receiver disposed inside the joint cylinder 1 is connected to the sliding valve 45 by the collar piece 33 of the fitting 32.
Since the gas is completely pushed in and prevented from moving at the same time, the gas supplied into the joint cylinder 1 through the through hole 46 of the slide valve 45 is stable without being reduced or blocked by the slide valve 45. supply will be carried out.

Of course, the gas hose connector A of the present invention can also be applied to a normal hose end 9 that is not equipped with a sliding valve, as shown in FIG.

The socket 6 is connected to the gas hose connector A attached to the hose end 9 of the main valve 8 in this manner, and gas is passed through the gas appliance through the flexible hose 5.

In this case, as shown in FIG. 3, the end of the bellows-shaped packing 50 disposed in the socket 6 is brought into close contact with the tip of the insertion part 7 that becomes the plug head, and the bellows-shaped packing 1-7
5 (The ball 51 is compressed by 1, and as a result, the ball 51 fits into the circumferential groove 52 provided on the outer periphery of the insertion portion 7, and at the same time, the operating ring 53 pops out to the right, preventing the ball 51 from floating up and connecting the socket 6 and gas connection. Tool A is connected.

At this time, the valve 35 is
is pushed to the right to open the valve 35, and gas flows from the hose end 9 to the hose 5 via the gas hose connector A.

[Effect of idea]

As described above, the present invention includes a cover ring which is slidably fitted onto the outer periphery of a joint cylinder and which can press a fixture, and a stopper which is movable in the radial direction and is biased outward in the radial direction by a spring, is attached to the cover ring. It is arranged on the outer periphery of the joint cylinder at a position opposite to the front end, and when the cover ring moves backward, the front part of the cover ring fits into the recessed part on the outer periphery of the rear part of the stopper, and the part between the protrusion and the recessed part on the outer periphery of the front part of the stopper The front end surface of the cover ring comes into contact with the stepped part, so when the hose end is press-fitted into the joint cylinder and the fixture is locked in the trough on the outer periphery of the hose end, the cover ring that presses the fixture from the outside will The cover ring does not move unless the cover ring is slid in the axial direction while pressing the stopper in the inner circumferential direction, and if the cover ring moves due to an unexpected external force, the fixing device will not be released and the hose end will be damaged. There is no risk of it coming off.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention in use, FIG. 2 is an enlarged half-sectional view of the same, FIG. 3 is an enlarged exploded half-sectional view of the same in use, and FIG. Fig. 5 is an enlarged half-sectional view showing another state of use of the same as above, Fig. 6 is a half-sectional view of the joint tube used in the above, Fig. 6 is a sectional view taken along the line X-X in Fig.
The figure is an enlarged partial sectional view of the Y section in Figure 6, Figure 8 is a view taken in the Z direction in Figure 6, and Figures 9a and b are an exploded perspective view and a perspective view of the hose end used in the above, respectively. , FIG. 10 is a half sectional view showing another embodiment of the present invention, and FIG. 11 is a sectional view of a conventional example, in which 1 is a joint tube, 2 is a through hole, 3 is a fixture, and 4 is a sectional view of a conventional example.
20 is a cover ring, 20 is a stopper, 21 is a protrusion, and 22 is a recessed step.

Claims (1)

[Scope of utility model registration request] A cylindrical insertion part that can be inserted into the socket is provided at the front end of the cylindrical joint cylinder, and a cylindrical fitting part is provided at the rear end of the joint cylinder to be connected to the hose end of the main stopper. A ball or pin fixture that can move forward and backward in the radial direction of the joint tube is housed in a through hole drilled in the rear end of the joint tube so as to penetrate inside and outside. A cylindrical cover ring is slidably fitted along the axial direction of the joint tube, and a convex portion for pressing the fixture is provided on the rear inner periphery of the cover ring corresponding to the through hole. Continuing from the convex part to the rear of the convex part, a recessed step part is provided on the outer periphery in which the head of the outer periphery of the joint cylinder of the fixture can fit, and the inner peripheral side of the front end of the cover ring on the outer periphery of the joint cylinder is provided. A stopper that is movable in the radial direction and is spring-biased toward the outside in the radial direction is provided at a position facing the stopper. A recessed step is provided, a protrusion protruding from the outer periphery of the front part of the stopper is provided, a step is provided between the protrusion and the recessed step, and the front end surface of the cover ring comes into contact with the stopper. The distance from the step part to the hole edge on the rear side of the through hole is approximately equal to the distance from the front end surface of the covering ring to the rear end of the convex part, and the height of the step part of the stopper is set so that the stopper is on the inner periphery. A gas hose connection device characterized in that the outer periphery of the protrusion is set at a height that is located inward from the inner circumferential surface of the covering ring and the road surface or the inner circumferential surface when pressed.