JPH0422156Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] The present invention is a plug for a pipe connector that is attached to the mouthpiece of a combustion gas main valve, etc., and to which a socket attached to the end of a hose on the gas appliance side is removably connected. It's about structure.

[Background Art] When connecting a hose connected to a gas appliance to a mouthpiece such as a gas main valve, conventionally the hose was directly connected to the mouthpiece. However, in this case, it is troublesome to attach and detach the cap and hose.
Recently, one-touch type pipe connectors have come into use to facilitate attachment and detachment. This type of pipe connector attaches a socket to the end of the hose on the gas appliance side, attaches a plug to the nozzle, and connects the socket and plug removably, allowing the nozzle and hose to be connected with one touch. It has been made possible to do so. By the way, as for the plug of this one-touch type pipe connector, when the plug is attached to the cap, the lock ball provided on the plug fits into the engagement groove of the cap, as disclosed in Japanese Utility Model Application No. 60-108890. Therefore, there are some devices that maintain the plug attached to the cap. However, although the plug of this pipe connector is easy to attach to the mouthpiece, the structure is complicated and the cost is high. In addition, in plugs using this type of lock ball, the engagement between the lock ball and the engagement groove can be released, and the plug and cap can be easily removed, so it can be easily removed by children. There is a risk of the plug being accidentally removed, which poses a safety problem.

[Purpose of the invention] The present invention has been made in view of the above points, and its purpose is to provide a plug for a pipe connector that has a simple structure and that prevents the plug from accidentally coming off the cap. It's about providing structure.

[Disclosure of the invention] (Structure) The present invention is directed to a combustion gas main valve, etc., in which a hose connected to a gas appliance, etc., is attached to a hose, etc., in which unevenness is formed in multiple stages in the longitudinal direction to prevent the hose from coming off. This plug is a pipe connector that is attached to a cap, and the diameter can be expanded due to elasticity.A ring body that fits into the uneven recesses of the inserted cap is housed inside the approximately cylindrical housing of the plug, and the plug is attached to the cap. When the installed plug is pulled in the direction of removing it from the base,
A substantially cylindrical retainer with which the ring body elastically fitted into the cap abuts, and a tapered surface is formed in this abutting portion to sandwich the ring body between the cap and prevent the ring body from expanding in diameter. A fitting is provided on the mouthpiece side of the housing, and when attaching the plug to the mouthpiece, the plug can be easily attached as before by simply press-fitting the plug into the mouthpiece.
In addition, once the plug is attached to the cap, the ring body and the stopper prevent the plug from coming out of the cap, and the ring body and the stopper have a simple structure to prevent the plug from coming off. The design is not complicated and costs can be reduced.

(Embodiment) An embodiment of the present invention is shown in FIGS. 1 to 4.
The present embodiment relates to a structure for preventing the plug 1 of a pipe connector from being detached from the base 2 of a pipe connector to which a socket (not shown) attached to the end of a hose connected to a gas appliance is detachably connected. Plug 1 is the base 2 for city gas etc. that can be attached to.
This is applied to a mounting portion in which a plurality of constricted bump-like projections and depressions for preventing slippage are formed in a plurality of stages in the longitudinal direction. Note that the cap 2 to which the plug 1 of this embodiment is attached is formed with a concave and convex portion 10 having a two-stage constriction and an oval cross-sectional shape in the longitudinal direction, particularly on the cap insertion port side of the mounting portion. The projections and depressions 10 are used to prevent the plug 1 from coming off the cap 2.

The housing 3 of the plug 1 has a substantially cylindrical shape, with one end formed thick so that the base 2 can be inserted therein, and the other end formed small in diameter so as to be inserted into the inside of the socket. A protrusion 5 is provided around the inner circumferential surface of the housing 3 at approximately the center thereof, and the protrusion 5 divides the inside of the housing 3 into a base insertion part and a socket attachment part. A substantially cylindrical gasket 4 whose hole has an inner diameter smaller than the narrowest outer diameter of the cap 2 is disposed at the back of the cap insertion portion of the housing 3, and this gasket 4 is inserted into the housing 3. The housing 3 is brought into airtight pressure contact with the outer peripheral surface of the cap 2 to prevent gas leakage from the cap 2 side of the housing 3. The end of the socket attachment part of the housing 3 has a thick wall and a narrow inner diameter.
A valve body 6 that opens when the socket is attached to the plug 1 is attached to the boundary with this narrow diameter portion. The valve body 6 includes a bottomed cylindrical body tube 7 with an open end on the mouthpiece 2 side, a ring-shaped valve packing 8 attached to the socket side surface of the body tube 7, and the body tube 7 and the protrusion 5. It is comprised of a pressing spring 9 that presses the main body cylinder 7 mounted between the sockets and the socket toward the socket. That is, when no external force is applied to the valve body 6, the main body cylinder 7 is biased toward the socket side by the pressing spring 9, and the valve gasket 8 is biased toward the socket side.
is brought into pressure contact with the end face of the narrow diameter portion, thereby closing the narrow diameter portion and blocking the outflow of gas.
When the socket is attached to the valve body 6, the main body cylinder 7 is pushed inside by the valve opening means provided in the socket, and the valve packing 8 is separated from the inner end surface of the narrow diameter part and passes through the narrow diameter part. The gas is allowed to escape. Note that when the socket is connected to the plug 1, the locking means of the socket is locked to the collar 16 of the outer cylinder 15 fitted on the outer surface of the plug 1, so that the connection state between the socket and the plug 1 is maintained. The locking means can be released from the locked state.

By the way, in this embodiment, as a structure for preventing the cap 2 from coming off, a ring body 11 is arranged on the uneven part 10 of the cap 2 on the inner circumferential surface of the housing 3, and the diameter can be freely expanded due to elasticity, and the housing 3 The ring body 11 is disposed on the inner circumferential surface of the cap insertion opening side of the cap, and elastically fits into the cap 2 when the plug 1 attached to the cap 2 is pulled in the direction of pulling it out from the cap 2.
A stopper 12 is provided which prevents the device from coming off by coming into contact with the device. The retainer 12 is made of metal and has a third
As shown in the figure, the housing 3 is formed into a substantially cylindrical shape, and is fixed to the base insertion opening side of the housing 3 by passing the housing 3 into a groove 13 provided around the outer circumferential surface and screwing together a screw (not shown). The ring body 11 is made of synthetic resin and has a C-ring shape with a hexagonal cross section as shown in FIG. Ingredients 1
It is loosely fitted between 2 and 2. The abutment surface, which is the inner surface of the opening on the ring body 11 side of the retainer 12, is a tapered surface 12a whose inclination angle is substantially the same as the slope surface on the upper surface side of the ring body 11. In this embodiment, this tapered surface 12a serves to prevent the diameter of the ring body 11 in contact with the retainer 12 from expanding.
In addition, on the side surface of the packing 4 on the ring body 11 side,
A contact plate 14 is provided with which the ring body 11 comes into contact when the ring body 11 moves toward the gasket 4 side. Further, on the outer surface of the housing 3 on the base 2 side, a sliding tube 1 whose base end is fitted between the outer tube 15 and the housing 3 and is slidable along the longitudinal direction of the plug 1 is provided.
7 is fitted. In addition, in the normal state, the sliding tube 17 covers the outer surface of the housing 3 by a return spring 18 provided in the outer tube 15 so that the portion of the retainer 12 fixed to the housing 3 is not exposed. The retainer 12 can be removed by sliding the sliding tube 17 toward the socket and removing the screw.

The plug 1 of this embodiment is attached to the base 2 by press-fitting the base 2 into the housing 3.
At this time, the ring body 11 is fitted into the cap 2, and as shown by the dashed line in FIG. As the diameter of the ring body 11 increases as shown by the broken line, the ring body 1
1 moves to the uneven part 10. When the base 2 is completely inserted into the housing 3,
Due to the inclination of the unevenness 10 of the cap 2 and the elastic return force that reduces the diameter of the ring body 11, the ring body 11 is pushed into the recess, which is the narrow part of the outer diameter of the cap 2, as shown by the solid line in FIG. 4a. Get stuck in. In this state, attachment of the plug 1 to the cap 2 is completed. In this way, even in this embodiment, the plug 1 can be attached to the cap 2 by simply press-fitting the cap 2 into the plug 1 using the same mounting method as the conventional method. At this time, the gasket 4 is brought into airtight pressure contact with the outer surface of the cap 2, and gas leakage from the cap insertion side of the housing 3 is prevented.
At this time, since the valve body 6 is also closed, there is no outflow of gas from the socket side.

Now, in this state, as shown in Figure 4b, plug 1
If a force is applied in the direction of pulling out the ring body 1
1 moves toward the stopper 12 as the base 2 moves from the broken line position to the solid line position in the figure. Finally, the ring body 11 fits between the tapered surface 12a of the stopper 12 that contacts the ring body 11 and the outer peripheral surface of the cap 2, and the plug 1 can no longer be pulled out. It disappears. In other words. When the ring body 11 that fits into the recess of the unevenness 10 of the cap 2 comes into contact with the retainer 12, the plug 1 is removed.
movement in the direction of withdrawal is prevented. Moreover, at this time, the inclined surface on the upper surface side of the ring body 11 is
The ring body 1 is pressed by the tapered surface 12a of 2.
1 is prevented from expanding, the ring body 11 is also prevented from moving toward the distal end of the cap 2. Therefore, the plug 1 is completely prevented from coming off from the base 2. Note that in normal use, it is not necessary to remove the plug 1 from the cap 2, but if, for example, it is necessary to remove the plug 1, remove the screw that secures the retainer 12 to the housing 3, and the retainer 12 can be removed. 12 is removed from inside the housing 3, and the plug 1 can be removed from the cap 2. As described above, according to this embodiment, the plug 1 can be attached to the cap 2 by simply press-fitting the plug 1 into the cap 2, and once the plug 1 is attached to the cap 2, the ring body 11 and the retainer 12 prevent the plug 1 from being attached to the cap 2. You can prevent it from falling out. Therefore, it is safe because the plug 1 will not be accidentally removed from the cap 2 due to a child's mischief or the like. Further, the ring body 11 and the retainer 1 having a simple structure as described above are used to prevent the plug 1 from coming off.
2, the structure is simpler and the cost can be lower than that of the conventional locking structure using lock balls.

[Effects of the invention] As described above, the present invention has a ring body whose diameter can be expanded due to elasticity and fits into the uneven recess of the inserted cap, which is installed inside the approximately cylindrical housing of the plug, and is attached to the cap. When the plug is pulled in the direction of removing it from the cap, the ring body elastically fitted into the cap comes into contact with the cap, and the ring body is sandwiched between the contact portion and the cap to expand the diameter of the ring body. A roughly cylindrical retainer with a tapered surface that prevents the plug from coming off is provided on the mouthpiece side of the housing, so when attaching the plug to the mouthpiece, simply press the mouthpiece into the plug and insert the plug as usual. Once the plug is attached to the cap, the ring body that is elastically fitted to the cap contacts the stopper, and there is a gap between the tapered surface of the stopper and the outer circumferential surface of the cap. By sandwiching the ring body between the two, the plug can be prevented from coming off from the cap, and it is therefore safe to prevent the plug from being accidentally removed from the cap due to a child's play. Furthermore, since the plug can be prevented from coming off using a ring body with a simple structure and a retaining tool, the structure of the plug does not become complicated and the cost can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a state in which a plug according to an embodiment of the present invention is attached to a base, Figs. 2 a and b are perspective views and enlarged sectional views of the same ring body, and Figs. 3 a and b are FIG. 4A is a perspective view and a partially cutaway side view of the same stopper as above, FIG. FIG. 3 is an explanatory diagram of a state in which the ring body and the retainer are prevented from coming off when force is applied. 1 is the plug, 2 is the base, 3 is the housing, 10
11 is a ring body, 12 is a stopper, 1
2a is a tapered surface.

Claims (1)

[Scope of utility model registration request] A plug for a pipe connector that can be attached to a mouthpiece such as a main valve for combustion gas, which has concavities and convexities constricted in multiple stages in the longitudinal direction to prevent it from coming off, on the attachment part of a hose connected to a gas appliance. A ring body whose diameter can be expanded due to elasticity and fits into the uneven depressions of the inserted cap is installed inside the approximately cylindrical housing of the plug, and the plug attached to the cap is pulled in the direction of removal from the cap. When tensioned, the ring body elastically fitted to the cap contacts the ring body, and the abutting portion is formed with a tapered surface that sandwiches the ring body between the cap and the ring body and prevents the ring body from expanding in diameter. A plug structure for a pipe connector, characterized in that a shaped retainer is provided on the mouthpiece insertion port side of the housing.