JPH0443671Y2 - - 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, with this one-touch type pipe fitting plug,
A gap is provided between the end face of the housing and the base of the mounting portion of the cap to prevent the cap from being unable to be attached to the plug due to an error in the length of the plug. However, this creates the problem that dirt and dust accumulates in this gap, contaminating the part where the plug is attached to the cap, and what's more, this dirt collects between the gasket installed inside the plug to prevent gas leakage, and the cap. There was also a risk that the gas could get between the gas and the gas and cause a gas leak.

[Purpose of the invention] The present invention was made in view of the above points, and its purpose is to prevent a gap from forming between the cap insertion opening of the plug and the base of the plug attachment part of the cap. The purpose of the present invention is to provide a plug structure for a pipe fitting.

[Disclosure of the invention] (Structure) The present invention is such that the tip of the mouthpiece, such as a main valve for combustion gas having a constriction in the center, is inserted into one end of a cylindrical shape, so that one end is attached to the mouthpiece, and the other end is attached to the mouthpiece. A plug of a pipe connector to which a socket attached to the end of a hose on a gas appliance side is removably connected, and a ring body whose diameter can be expanded freely and is housed in the one end and fits into the constriction of the mouthpiece; A retainer is attached to the inner periphery of the cap insertion side at one end by screwing from the outer surface side, and engages with the ring body to prevent the cap from coming off when an external force is applied to remove the cap from the cap. It is attached to the outer circumferential surface of one end so as to close the screwed part of the stopper so as to be slidable in the mounting direction of the cap, and when attached to the cap, the end on the cap side touches the base of the plug attachment part of the cap. It is equipped with a sliding tube that is biased by a spring so that they come into contact with each other, and the sliding tube covers the gap between the plug insertion opening and the base of the plug attachment part of the cap, thereby preventing the plug and the cap from coming into contact with each other. This prevents a gap from forming between the base of the plug mounting part and the base of the plug mounting part, thereby preventing the plug mounting part of the cap from becoming dirty or causing gas leakage.

(Embodiment) An embodiment of the present invention is shown in FIGS. 1 to 4.
The plug of the pipe connector of this embodiment has a socket (not shown) attached to the tip of a hose connected to a gas appliance removably connected to one end, and a mouthpiece 2 for city gas etc. to the other end. is inserted. The cap 2 to which this plug 1 is attached has a plurality of constricted knob-like projections and depressions for preventing slippage formed in the longitudinal direction of the attachment part of the plug 1, and the base of the attachment part is connected to the gas pipe with a nut 19 or the like. It is connected to 20. In addition, the plug 1 of this embodiment is attached to a cap 2 in which a concave and convex portion 10 is formed, which is constricted in two steps on the cap insertion opening side of the mounting portion, and has an oval outer shape in a cross section in the longitudinal direction. The projections and depressions 10 are designed 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 of the narrow diameter portion, thereby closing the narrow diameter portion and blocking gas outflow.
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.
It is provided with a retainer 12 that comes into contact with the retainer 12 and prevents the retainer from coming off. The retainer 12 is made of metal and has a substantially cylindrical shape as shown in FIG. It is fixed to the base insertion port side of No.3. The ring body 11 is made of synthetic resin and has a C-ring shape with a hexagonal cross section as shown in FIG. It is loosely fitted between the tool 12. 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. Also,
A contact plate 14 is provided on the side surface of the seal 4 on the ring body 11 side, with which the ring body 11 comes into contact when the ring body 11 moves toward the seal 4 side.

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 concave and convex portions 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, the attachment of the plug 1 to the cap 2 is completed. In this way, 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 socket 2, preventing gas leakage from the socket insertion side of the housing 3, and since the valve body 6 is also closed, no gas leaks from the socket side. Nor.

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
movement in the direction of the stopper is prevented, and at this time, the inclined surface on the upper surface side of the ring body 11 is pressed by the tapered surface 12a of the stopper 12, preventing the ring body 11 from expanding in diameter. 11 is also prevented from moving toward the tip of the base 2. Therefore, the plug 1 is completely prevented from coming off from the base 2. In this way, according to this plug 1, the plug 1 can be inserted into the cap 2 simply by press-fitting it into the cap 2.
Once attached to the cap 2, the plug 1 can be prevented from coming off from the cap 2 by the ring body 11 and the stopper 12. 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. In addition, the ring body 11 having a simple structure as described above is used to prevent the plug 1 from coming off.
Since this can be realized using the locking device 12 and the locking device 12, the structure is simpler and the cost can be reduced compared to the conventional locking structure using lock balls.

Furthermore, the base 2 of the housing 3 of the plug 1
A sliding cylinder 17 whose base end is fitted between the outer cylinder 15 and the housing 3 and is slidable along the direction in which the plug 1 is fitted is fitted to the outer surface of the side. The tip, which is the end on the mouthpiece side of the tube 17, is made to protrude from the end face of the mouthpiece insertion opening of the housing 3 and is brought into contact with the base of the plug attachment part of the mouthpiece 2.
That is, a return spring 18 is provided in the part fitted into the outer cylinder 15, the plug 1 is attached to the cap 2 as shown in FIG. The tip end surface of the sliding tube 17 is brought into contact with a nut 19 attached to the base of the plug attachment part. That is, by the sliding tube 17 coming into contact with the nut 19, the sliding tube 17 can cover between the cap insertion opening of the plug 1 and the base of the plug attachment of the cap 2.
There is no gap between the plug and the base of the plug mounting part.
Therefore, dirt and dust will not accumulate in the gap and the mounting portion of the cap 2 will become dirty, and dirt and the like will not enter between the gasket 4 and the outer peripheral surface of the cap 2 and cause gas leakage. 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, press the return spring 18 to move the sliding tube 17 to the socket side.
When the retainer 12 is slid against the urging force of
By removing the screws of this fixed part, the stopper 12 can be removed from the housing 3 and the plug 1 can be removed.
can be removed from the cap 2. Further, in the above embodiment, the ring body 11
The present invention was applied to a plug 1 in which the plug 1 was prevented from coming off from the cap 2 with a stopper 12.
Of course, the present invention can also be applied to a plug that can be detachably attached to the cap 2 by engaging a conventional lock ball in the engagement groove of the cap 2.

[Effects of the invention] As described above, the present invention is such that one end of a cylindrical end is inserted into one end of a cylindrical shape, and the other end is attached to a cylindrical end. A plug of a pipe connector to which a socket attached to the end of a hose on a gas appliance side is removably connected, and the ring body is housed in the one end and has a diameter that can be expanded freely and fits into the constriction of the cap. ,
A retainer is attached to the inner periphery of the cap insertion side at one end by screwing from the outer surface side, and engages with the ring body to prevent the cap from coming off when an external force is applied to remove the cap from the cap. It is attached to the outer circumferential surface of one end so as to close the screwed part of the stopper so as to be slidable in the mounting direction of the cap, and when attached to the cap, the end on the cap side touches the base of the plug attachment part of the cap. It is equipped with a sliding tube that is biased by a spring so as to be in contact with each other, and is attached to the outer peripheral surface of one end so as to be slidable in the mounting direction of the cap, and when attached to the cap, the end on the cap side is attached to the cap. The sliding tube is spring-biased so as to come into contact with the base of the plug attachment part of the plug. This prevents a gap from forming between the base of the plug attachment part of the mouthpiece and the base of the plug attachment part of the mouthpiece.This prevents dirt and dust from accumulating in the gap and contaminating the plug attachment part of the mouthpiece. There is no possibility of gas leaking between the gasket installed inside the plug and the outer circumferential surface of the cap to prevent leakage, and the expanding diameter self-adhesive is housed in one end and fits into the constriction of the cap. It is attached to the ring body and the inner circumference of the cap insertion side of one end by screwing from the outside surface side, and when an external force is applied to remove the cap from the cap, it engages with the ring body and prevents the cap from coming off. It is equipped with a retainer, and the screw-holding part of the retainer is closed with a sliding tube, which has the effect of preventing the retainer's screw from oxidizing and corroding. .

[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
7 is a sliding tube, and 19 is a nut.

Claims (1)

[Scope of utility model registration request] A socket with one end attached to the cap such as a combustion gas main stopper with a constriction in the center by inserting it into one end of a cylindrical shape, and the other end attached to the end of a hose on the gas appliance side. It is a plug for a pipe connector to which a pipe connector is detachably connected, and includes a ring body that is housed in the above-mentioned one end and whose diameter can be freely expanded to fit into the constriction of the cap, and an outer surface on the inner periphery of the cap insertion side of the one end. A retainer is attached by screwing from the side and engages with the ring body to prevent the cap from coming off when an external force is applied to remove it from the cap, and one end is configured to close the screwed part of the retainer. A sliding tube is attached to the outer peripheral surface of the cap so as to be slidable in the mounting direction of the cap, and is biased by a spring so that the end on the cap side comes into contact with the base of the plug attachment part of the cap when attached to the cap. A plug structure for a pipe fitting characterized by comprising: