JPH08128579A - Plug - Google Patents

Abstract

PURPOSE: To provide a plug which can be installed easily in a narrow space while prevented from projecting beyond a red line mark part of a rubber tube opening, is provided with great tensile strength, and cannot be easily removed. CONSTITUTION: In a plug 3, one end part is connected to a rubber tube opening 1 in a gas cock, gas equipment, or the like, while the other end part is connected to a socket A lock pin 4 is arranged in the end part on the rubber tube opening 1 side of the plug 3. The lock pin 4, whose tip is projected into the inside of the plug 3, can be freely moved in the diagonal direction, so that its projecting side is positioned closer to the opening side. A pressing member 5 pressing the lock pin 4 onto the rubber tube opening 1 side is arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug whose one end is connected to a gas main plug or a rubber tube opening of a gas appliance and the other end is connected to a socket.

[0002]

2. Description of the Related Art Conventionally, in a plug having one end connected to a rubber pipe opening such as a gas main plug or a gas appliance and the other end connected to a socket, a structure for attaching to the rubber pipe opening is, for example, an actual structure. There are known ones such as those disclosed in Japanese Utility Model Laid-Open No. 60-108890 or those disclosed in Japanese Utility Model Publication No. 4-22156.

The former conventional example is a so-called ball-lock type, and as shown in FIG. 5 (a), the plug 3 is attached to the rubber tube opening 1 while the sleeve 40 is pulled. Is fitted into the rubber tube opening 1, and when the fitting is completed, the sleeve 40 is returned to its original state, and the ball 40 is pressed by the sleeve 40 so that the ball 41 is fitted into the concave portion 6a of the uneven portion 6 of the rubber tube opening 1 and locked. ing.

Further, in the latter conventional example, as shown in FIG. 6, a C-shaped ring body 42 installed inside the plug 3 is provided.
Plug the retaining member 43 for preventing the ring body 42 from expanding in diameter when the plug 3 is pulled from the rubber tube opening 1 in a state where the plug 3 is elastically fitted in the concave portion 6a of the uneven portion 6 of the rubber tube opening 1. It is provided on the opening side of No. 3.

[0005]

In the former example of the ball lock type, it is necessary to fit the sleeve 40 to the rubber tube opening 1 while pulling the sleeve 40, which results in poor workability. Bad, and in tight places the sleeve 40
In some cases, the finger that pulls the cable interferes with installation. Further, a red line display portion 29 is provided at the rear end of the uneven portion 6 of the rubber tube opening 1 and is used as a guide for the insertion depth when the rubber tube is fitted into the rubber tube opening 1. When the plug 3 of the ball lock type is inserted all the way into the rubber tube opening 1, the rear end of the plug 3 overruns the red line display portion 29 of the rubber tube opening 1 as shown in FIG. I will end up. Therefore, as shown in FIG. 5B, there is a problem that the red line display portion 29 cannot be attached to the rubber tube opening 1 having a wall 45 immediately behind it. If the wall thickness of the ball holding portion 44 (indicated by the dimension L in FIG. 5) is reduced in order to solve this, the thin portion may be broken and deformed.

Further, in the conventional example using the latter ring body 42, since the retainer 43 is provided closer to the opening 1 side than the ring body 42 of the plug 3, this is also the same as the former conventional example. 3 Since the rear end of the rubber tube exits from the red line display portion 29 of the rubber tube opening 1, there is a problem that the red line display area 29 cannot be attached to the rubber tube opening 1 having a wall immediately behind it.

Including the above-mentioned conventional examples, the plug 3 connected to the rubber tube opening 1 can be attached so as not to project from the red line display portion 29, can be attached even in a narrow space, and has a tensile strength. It is required to satisfy various conditions such as strong resistance and easy removal. The present invention has been made in view of the above points, and can be attached so as not to protrude from the red line display portion of the rubber tube mouth, and can be easily attached even in a narrow space, and has a strong tensile strength. To provide a plug that is safe and cannot be easily removed.

[0008]

In order to solve the above-mentioned conventional problems and achieve the object of the present invention, the plug of the present invention is
In a plug 3 having one end connected to a rubber tube opening 1 of a gas main plug or a gas appliance and the other end connected to a socket 2, a lock pin 4 is provided at an end of the plug 3 on the rubber tube opening 1 side. A pressing member 5 for pressing the lock pin 4 toward the rubber tube mouth 1 side is provided so that the tip of the lock pin 4 projects into the plug 3 and is movable toward the protruding side so as to be positioned closer to the opening side. It is characterized by consisting of.

[0009]

According to the present invention having the above structure, the plug 3
Of the lock pin 4 provided at the end of the rubber tube mouth 1 side is projecting into the plug 3 and is movable in an oblique direction so that the protruding side is located closer to the opening side. Since the pressing member 5 for pressing the pressing member 5 is provided, when the plug 3 is fitted into the rubber tube opening 1, the force of the lock pin 4 trying to move outward acts to push the pressing member 5 outward. On the other hand, when the lock pin 4 moves along the uneven portion 6 on the outer peripheral portion of the rubber tube opening 1 and reaches the red line display portion 29 of the rubber tube opening 1, the installation is completed. After the plug 3 is fitted into the rubber tube opening 1 and attached, even if the plug 3 is pulled, the lock pin 4 does not exert an outward force so that the plug 3 does not come off from the rubber tube opening 1. And, since the lock pin 4 is oriented obliquely so as to be positioned closer to the opening side toward the protruding side,
The protruding end of the lock pin 4 can be brought as close as possible to the opening side of the plug 3, and when the plug 3 is attached, the end of the plug 3 can be attached so as not to overrun the red line display portion 29 of the rubber tube opening 1. become.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 shows a sectional view of the plug 3 of the present invention. In this embodiment, an example of the plug 3a for the main plug is shown. The plug main body 38 that constitutes the main body of the plug 3 has a tubular shape, and the pin 3 having a tubular shape is screwed and fixed to one end side of the plug main body 38 to form the plug 3.

A spring bearing 9 is internally provided in the plug body 38, and the plug valve 10 moves between the spring bearing 9 in the plug body 38 and the valve receiving portion 7 at the other end of the plug body 38. The plug valve 1 is freely installed in the plug valve 1 due to the coil spring 11 interposed between the spring receiver 9 and the plug valve 10.
0 presses the valve receiving portion 7 to close the flow path of the plug 3.

The pin holder 8 has a cylindrical shape, and the inner peripheral portion of the pin holder 8 has an insertion guide inclined hole portion 12 provided on one end side and having a larger diameter on the end side, and a small diameter portion provided on an intermediate portion. The structure is such that a hole 13 and a large-diameter hole 14 in which an internal thread is formed on the inner surface provided on the other end side are provided. With the large diameter hole portion 14 of the pin holder 8 screwed and fixed to the plug body 38, the packing material is provided between the stepped portion 15 which is the boundary between the small diameter hole portion 13 and the large diameter hole portion 14 and the spring receiver 9. 16 is interposed.

A peripheral groove portion 17 having a V-shaped cross section is provided on the outer peripheral portion of the pin holder 8, and lock pin insertion holes 18 are formed at a plurality of positions in the peripheral direction of the peripheral groove portion 17, and this peripheral portion is also formed. A positioning hole 27 is formed in the groove portion 17. The lock pin insertion hole 18 is inclined with respect to the axial center of the plug 3, and the inclination direction is inclined so that it is located closer to the opening side of the plug 3 on the side opposite to the peripheral groove portion 17.
The lock pin insertion hole 18 has a large diameter hole 19 on the side of the peripheral groove portion 17 and a small diameter hole 20 on the end opposite to the peripheral groove portion 17.

The lock pin 4 is movably fitted in the lock pin insertion hole 18, and the tip of the lock pin 4 projects into the plug 3. Since the lock pin insertion hole 18 is inclined in the moving direction of the lock pin 4, the lock pin 4 can be moved obliquely so as to be located closer to the end opening side of the plug 3 on the protruding side. The inward protruding position is obliquely projected toward the opening side in the insertion guide inclined hole portion 12 portion of the pin holder 8. Here, the head portion 22 of the lock pin 4 has a larger diameter than the shaft portion 21, and the diameter of the head portion 22 is larger than that of the small diameter hole 20 of the lock pin insertion hole 18, so that the lock pin 4 is locked. It does not fall out of the pin insertion hole 18 into the plug 3.

A pressing member 5 made of a C-ring is fitted in a peripheral groove portion 17 having a V-shaped cross section provided on the outer peripheral portion of the pin holder 8, and the tip of the lock pin 4 is projected into the plug 3 by the pressing member 5. A pressing force is applied in the direction of Here, the pressing member 5 has elasticity by itself, and applies a pressing force to the lock pin 4 in a direction in which the tip of the lock pin 4 projects into the plug 3. In the embodiment, the pressing member 5 is made of a synthetic resin having elasticity by itself, but in order to make the pressing more reliable, the groove portion 24 is provided on the outer peripheral portion of the pressing member 5. In addition, a metal spring 25 is wound around the groove portion 24 to ensure the pressing of the lock pin 4 by the pressing member 5.

When the pressing member 5 is provided with a positioning projection 26 as shown in FIG. 2 and the positioning projection 26 is fitted into the positioning hole 27 provided in the pin holder 8,
The pressing member 5 is prevented from shifting in the circumferential direction in the circumferential groove portion 17 and can always be positioned at a normal position in the circumferential groove portion 17 in the circumferential direction. As a result, a cracked portion in the circumferential direction of the pressing member 5 including the C ring is formed. Can be prevented from facing the head 22 of the lock pin 4, and the head 22 of the lock pin 4 can be reliably pressed by the pressing member 5 composed of the C ring.

The plug 3 of the present invention having the above-mentioned structure is connected to the rubber pipe port 1 such as a gas main plug or a connecting portion of a gas appliance. The rubber tube mouth 1 is formed with a rugged concave-convex portion 6 for preventing slipping out in the longitudinal direction, and a display is provided at the rear end of the concave-convex portion 6 for preventing slipping-out as a guide for the fitting depth of the rubber hose. Parts are formed, and normally this display part is a red line display part 29.

Therefore, the plug 3 of the present invention is attached to the rubber tube mouth 1.
When connecting to, it is done as follows. First, as shown in FIG. 3A, one end of the plug 3 (that is, the end on the pin holder 8 side) is fitted into the rubber tube opening 1. FIG. 3A shows a state in which the plug 3 is being fitted. Here, when the plug 3 is fitted into the rubber tube opening 1, the lock pin 4 is inclined so that the tip end side is closer to the opening side.
The tip end of the lock pin 4 abuts on the outer surface of the uneven portion 6 provided on the outer peripheral portion of the rubber tube opening 1. At this time, a force to move the lock pin 4 outward is exerted to push the pressing member 5. The pressing member 5 spreads outward along the peripheral groove portion 17 having a V-shaped cross section, whereby the tip of the lock pin 4 moves along the uneven portion 6 on the outer peripheral portion of the rubber tube opening 1. In this case, as shown in FIG. 3 (b), the pressing member 5 having a V-shaped cross section moves outward along one inclined inner surface of the circumferential groove portion 17 having a V-shaped cross section so that the pressing member 5 moves outward so that a light force is applied. The pressing member 5 is smoothly moved by. In this way, when the plug 3 is pushed into the rubber tube opening 1 and reaches the red line display portion 29 of the rubber tube opening 1, the installation is completed. In this state, the tip of the lock pin 4 elastically contacts the concave portion 6a of the concave-convex portion 6 immediately in front of the red line display portion 29 provided in the rubber tube opening 1. In this state, the packing material 16 elastically comes into close contact with the outer periphery of the rubber tube opening 1 to maintain airtightness.

In the present invention, the lock pin 4
Is oriented obliquely so that the protruding side is located closer to the opening side, so that the protruding end of the lock pin 4 should be as close as possible to the plug 3
Can be brought closer to the opening side of the plug 3 (in the embodiment shown in the figure, the protruding tip of the lock pin 4 is brought close to almost the same position as the opening of the plug 3).
When the plug is mounted, the plug 3 can be mounted so that the end portion of the plug 3 does not overrun the red line display portion 29 of the rubber tube opening 1.

On the other hand, after the plug 3 is fitted in and attached to the rubber tube opening 1, even if the plug 3 is pulled, no outward force is exerted on the lock pin 4 so that the tip of the lock pin 4 is pushed into the recess 6a. The contacted and locked state is maintained, and the plug 3 does not come out from the rubber tube opening 1. As described above, according to the present invention, the plug 3 can be locked in a predetermined state by the lock pin 4 by a simple operation of fitting the plug 3 into the rubber tube opening 1.

The socket 2 is connected to the other end of the plug 3 attached to the rubber tube opening 1 as described above. In FIG. 4, the plugs 3a on the main plug side and the plugs 3b on the appliance side (plugs 3b on the appliance side) are provided as plugs 3 in the rubber tube openings 1 provided in the gas main plug 32 and the gas appliance 33 respectively.
(No plug valve is provided on the
2 shows an example in which the rubber tube port 1 on the gas main plug 32 side and the rubber tube port 1 on the gas appliance 33 side are connected by the sockets 2 provided at both ends of the. Here, the connection between the plug 3 and the socket 2 is performed by a conventionally known ball lock type connection. That is, the ball 3 provided on the socket 2 by fitting the socket 2 as shown in FIG.
4 is fitted into the ball locking peripheral groove 35 provided at the other end of the plug 3, and the ball 34 is pressed by the inner peripheral part of the sleeve 40 movably fitted to the socket 2 so that the plug 3 is inserted into the socket 2 Are to be connected. In this case, in the case of the plug 3a on the gas main plug side for connecting the plug 3 to the gas pipe port 1 provided on the gas main plug 32 side, the plug valve 10 is provided as described above, but the plug 3 has the socket 2 When the plug valve 10 is fitted, the plug valve 10 is pushed by the push rod portion 37 provided in the socket 2 to open the gas passage in the plug 3. The arrow in FIG. 4 indicates the direction of gas flow.

[0022]

As described above, according to the present invention, a lock pin is provided at the end of the plug on the rubber tube mouth side, and the tip of the lock pin projects into the plug and is located closer to the opening side toward the projecting side. Since it is movable in a diagonal direction and has a pressing member for pressing the lock pin toward the rubber tube mouth side, the plug can be fitted into the rubber tube only by inserting the plug into the rubber tube mouth. At the same time, the lock pin can be locked in the recess of the rubber tube mouth, which allows easy and quick installation, and the state where the sleeve is pulled with fingers like the conventional ball lock type. There is no need for troublesome work such as fitting with, and it can be installed even in a narrow space, and the lock pin is diagonally oriented so that it is located closer to the opening toward the protruding side. The protruding end of the lock pin can be brought as close as possible to the opening side of the plug.As a result, the plug can be attached so that the end of the plug does not overrun the red line indicator of the rubber tube when mounting the plug. This makes it possible to install the plug without problems even if the area right behind the red line display part looks like a wall. Furthermore, since the lock pin is oriented diagonally so that it is located closer to the opening toward the protruding side, and the lock pin is pressed against the rubber tube mouth side by the pressing member, the plug should be inserted into the rubber tube mouth once. , Even if the pulling force is applied to the plug, the force that tries to move outward does not act on the lock pin, so the lock pin remains locked in the recess of the rubber tube opening. It is possible to provide a plug having high withdrawal proof strength, which cannot be easily removed, and which is highly safe.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a plug of the present invention.

FIG. 2 is a cross-sectional view of a portion in which the above positioning protrusion is fitted into a positioning hole.

FIG. 3A is a sectional view showing a state where a plug is being fitted into the rubber tube opening, and FIG. 3B is a sectional view showing a state where the plug is completely fitted into the rubber tube opening.

FIG. 4 is an explanatory view showing a state in which the plug on the main plug side connected to the rubber pipe opening on the main plug side and the plug on the appliance side connected to the rubber pipe opening of the gas appliance are connected by sockets provided at both ends of the gas hose. FIG.

FIG. 5 shows a conventional example, (a) is a sectional view of a connected state, and (b) is a side view showing an example of a rubber tube port.

FIG. 6 is a cross-sectional view showing another conventional example.

[Explanation of symbols]

 1 rubber tube mouth 2 socket 3 plug 4 lock pin 5 pressing member

Claims (1)

[Claims] 1. A plug, one end of which is connected to a rubber pipe opening of a gas main plug or a gas appliance, and the other end of which is connected to a socket, wherein a lock pin is provided at the rubber pipe opening side end of the plug. The tip of the lock pin is movable in an oblique direction so that the tip of the lock pin projects into the plug and is positioned closer to the opening side toward the projecting side,
A plug comprising a pressing member for pressing the lock pin toward the rubber tube mouth side.