JPH0616207Y2 - Coupling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a socket connected to a gas supply source side pipe,
The present invention relates to a joint device including a plug detachably connected to the socket.

[Prior Art] For example, in a crater of a gas burner, a socket connected to a gas supply source and a plug with a nozzle detachably connected to the socket are provided to enable replacement of a nozzle portion. Many of the configured ones are used.

In the crater of the gas burner having such a configuration, as a mechanism for connecting the socket and the plug, a lock ball is provided at the tip of the main socket barrel body, and the lock ball is centered by being urged by a compression spring on the outer circumference of the tip. A sleeve that presses in the direction is fitted, while the plug has a circumferential groove on the outer periphery for locking the lock ball, and the lock ball provided on the socket main barrel is slid by the sleeve to operate the lock ball on the plug. It is general that the circumferential groove is detachable.

[Problems to be Solved by the Invention] According to the crater of the gas burner having the connection mechanism of the socket and the plug, when the gas burner is used, the socket is heated by receiving heat from the plug having the nozzle. Since it is unavoidable, the function of the compression spring that biases the sleeve in the lock ball pressing direction on the outer circumference of the socket main body is likely to be deteriorated by heat, and as a result, the slight impact on the sleeve causes the sleeve to lock the ball. There was a risk that the pressing force of would move in the direction of releasing it. As a result, if care is not taken, the crater of the gas burner may come off.

The present invention aims to solve the problem of the crater of the gas burner, for example.

[Means for Solving the Problems] In order to solve the above problems, the present invention comprises a socket connected to a gas supply source side pipe and a plug detachably connected to the socket, and constitutes the socket. A plug connecting rod having a pin locking groove at a point-symmetrical position at its tip is loosely fitted in the inside of the cylindrical body so as to be movable in the axial direction while being prevented from rotating. A compression spring for biasing the plug connecting rod rearward is interposed between the plug connecting rod and the tip of the plug can be fitted between the cylindrical body and the plug connecting rod. A structure is adopted in which a locking pin which is formed and is engageable with the pin locking groove formed at the front end of the plug connecting rod is provided.

[Operation] When connecting the socket and the plug, insert the plug between the cylindrical body inside the socket and the plug connecting rod, and form the locking pin provided at the tip of the plug at the tip of the plug connecting rod of the socket. It engages with the pin locking groove, and then the plug is rotated. By this rotation of the plug, the locking pin provided at the tip of the plug moves along the pin locking groove of the plug connecting rod whose rotation is restricted, and at this time, the plug resists the elastic force of the compression spring. Move to the side. The compression spring is compressed, and the elastic force pulls the plug toward the inner part of the socket through the plug connecting rod, and this pulling force presses the plug against the tip surface of the cylinder to prevent its return rotation. , The socket and the plug are connected. Even if the socket and the plug are heated during use, the compression spring that presses the plug into contact with the cylinder directly receives the cooling action of the fluid in the cylinder, so the function of the compression spring does not deteriorate due to heating. .

[Embodiment] The present invention will be described in detail below based on an embodiment shown in the drawings, but the present invention is not limited to the embodiment.

In the drawings, 1 is a socket connected to a gas supply source (not shown), and 2 is a socket 1 having a nozzle 3 therein.
A plug that is detachably connected to the socket, and the socket 1 and the plug 2 constitute the crater of the gas burner.

Reference numeral 4 denotes a cylindrical body which is an outer cylinder of the socket 1, and 5 denotes a plug connecting rod which is loosely fitted in the cylindrical body 4 so as to be axially movable. At the rear portion of the cylindrical body 4, the cylindrical body 4 and the plug connecting rod are connected. A flow path 6 for combustible gas is formed between the flow path 5 and the flow path 5. Reference numeral 7 denotes a cylindrical body 4 which supports the plug connecting rod 5 concentrically with the cylindrical body 4.
The guide 7 secures the flow path 6 between the plug and the rod 5, and the guide 7 is fixed to the inner circumference of the cylindrical body 4.
Reference numeral 8 is a passage hole formed in the guide 7, and four passage holes are formed at equal intervals in the circumferential direction. Reference numeral 9 is a restricting body that prevents the plug connecting rod 5 from rotating about its axis and allows it to move only in the axial direction, and is fixed to the rear end portion of the plug connecting rod 5. The restricting body 9 has four engaging pieces 1 radially projected on the outer periphery of a disc 10 having a diameter smaller than the inner diameter of the cylindrical body 4.
1, the disc 10 is axially slidably fitted in the tubular body 4, and the engaging piece 11 is four slits formed in the rear end portion of the tubular body 4 in the axial direction. It is loosely fitted to 12 to regulate the rotation of the plug connecting rod 5. Reference numeral 13 is a through hole formed in the disk 10 symmetrically with the through hole 8.

A tip portion 5'of the plug connecting rod 5 is configured by a hollow cylindrical body, and the hollow cylindrical portion has a tip opening groove 14 parallel to the axial direction, and communicates with the tip opening groove 14 and extends obliquely rearward. A pin locking groove 26 is formed that includes a guide groove 15 and a locking groove 16 that communicates with the inner portion of the guide groove 15 and extends in the circumferential direction.

Reference numeral 17 denotes a compression spring interposed between the restricting body 9 and the guide 7 in the cylindrical body 4, and the elastic force of the compression spring 17 urges the plug connecting rod 5 rearward (left side in the drawing). There is. 18 is a stop ring that prevents the plug connecting rod 5 from coming off, that is, the restricting body 9, and 19 is a circular engaging projection provided on the inner circumference of the cylindrical body 4, to which the sharp edge formed at the tip end is connected. The wire is firmly in line contact with the tip of the plug 2 to form a metal-to-metal so-called metal seal. Reference numeral 20 is a threaded portion formed on the outer circumference of the cylindrical body 4 for connecting the socket 1 to a gas supply source.

On the other hand, the plug 2 has a cylindrical tip insertion portion 21 having an inner and outer diameter that can be inserted between the cylinder body 4 of the socket 1 and the plug connecting rod 5, and the tip insertion portion 21 has Pin locking groove 26 formed at the tip of the plug connecting rod 5
A locking pin 22 having a diameter that can be engaged with is provided in the passing direction, and the distal end insertion portion 21 of the plug 2 is inserted into the socket 1 so that the locking pin 22 is slanted through the distal end opening groove 14. When the tip of the plug 2 reaches the state in which the tip of the plug 2 is firmly in line contact with the sharp edge of the engaging projection 19 provided on the inner circumference of the tubular body 4, the engaging pin 22 causes the engaging groove 22 to move. It is adapted to engage with 16.

Next, the operation of the above embodiment will be described.

When the plug 2 is connected to the socket 1, the locking pin 22 exposed on the plug 2 is attached to the tip opening groove 14 of the socket 1.
The plug 2 is inserted into the socket 1 in a state of being opposed to the socket 1 and the locking pin 22 provided on the plug 2 is inserted into the tip opening groove 14
When the plug 2 is engaged with the same groove 14, the locking pin 22 rotates the plug 2 in a direction in which the locking pin 22 moves along the oblique guide groove 15. When the locking pin 22 moves in the guide groove 15, the plug 2 advances in the socket 1 and its tip eventually becomes the cylindrical body 4.
It comes into contact with the sharp edge of the engaging projection 19 provided on the inner circumference of the.

At this time, immediately before the locking pin 22 is engaged with the locking groove 16, when the plug 2 is further rotated, the locking pin 22 of the plug 2 is prevented from further progressing and further rotated. It is completely locked in the locking groove 16 and the metal seal by the engaging projection 19 is completed. The plug connecting rod 5 whose rotation is restricted by the restricting body 9 ensures the locking of the locking pin 22 and the locking groove 16 by the elastic force of the compression spring 17 as the plug 2 rotates. , The socket 1 and the plug 2 are attracted to each other, and by this attractive force,
The plug 2 is pressed against the engaging projection of the cylindrical body 4 in a completely line contact state to prevent return rotation, and the socket 1 and the plug 2 are connected in a metal-sealed state.

When the socket 1 and the plug 2 are separated from each other, the plug 2 can be rotated in a direction opposite to the above-mentioned rotation so that the locking pin 2
Since the engagement between 2 and the locking groove 16 is released, they can be easily separated.

The cap 23 shown in FIG. 7 is a cap having a locking pin 25 having the same structure as the insertion tip of the plug 2, and closes the opening of the socket 1 when the socket 1 is not used. It is attached to and detached from the socket 1 by the same operation as the plug 2.

[Advantage of the Invention] According to the present invention, when the socket and the plug are connected, the locking pin provided on the plug side is engaged with the opening groove formed at the tip of the socket connecting plug on the socket side, and The socket and the plug can be easily connected only by a simple operation such as rotating the plug. However, at the time of connection, the socket and the plug attract each other and maintain this connection state.Therefore, the connection state is strong, and even if it is heated, there is no risk of separation and the seal remains unchanged. There is an effect that it can be maintained.
Moreover, since the structure is simple, it can be easily handled and manufactured, and can be provided at low cost.

[Brief description of drawings]

The drawings show an embodiment of the joint device according to the present invention.
1 is a vertical side view, FIG. 2 is a vertical side view showing an incompletely connected state immediately after inserting a plug into a socket, and FIG. 3 is a view showing, for example, rotating the plug to reach a completely connected state between the socket and the plug. FIG. 4 is a rear view of the socket shown in FIG. 1, FIG. 5 is a plan view of the plug connecting rod,
FIG. 6 is a plan view showing the engagement state of the locking pin and the tip opening groove in the state shown in FIG. 2, and FIG. 7 shows a socket cap having the same structure as the plug shown in FIG. It is a vertical side view shown. DESCRIPTION OF SYMBOLS 1 ... Socket, 2 ... Plug, 4 ... Cylindrical body 5 ... Plug connection rod, 14 ... Tip opening groove 15 ... Guide groove, 16 ... Locking groove 17 ... Compression spring, 22 ... Locking pin 26 ... Pin locking groove

Claims (1)

[Scope of utility model registration request] 1. A pin locking groove is formed at the tip of a cylindrical body which comprises a socket connected to a gas supply source side pipe and a plug which is detachably connected to the socket. A plug connecting rod provided at a point symmetrical position is loosely fitted so as to be movable in the axial direction while being regulated so as not to rotate, and the plug connecting rod is attached to the rear between the cylindrical body and the plug connecting rod. A biasing compression spring is interposed, and in the case of the plug, the tip of the plug is formed so that it can be fitted between the cylindrical body and the plug connecting rod, and the tip of the plug is formed at the tip of the plug connecting rod. A joint device provided with a locking pin engageable with the pin locking groove.