JPS6023594Y2 - plug - Google Patents

Description

[Detailed description of the invention] "Industrial Application Field" This invention relates to a plug for injection of Freon gas used as a refrigerant for car coolers and room coolers.

``Prior Art'' This type of conventional plug is used by being screwed onto a compressor or evaporator 1, as shown in FIG. 4, and this plug has a valve 3 in a main body 2, It also has a male thread 4 for connection on the outer peripheral surface, and the tip of a pipe connected to a pump (not shown) is screwed into the male thread 4 to connect, and the valve 3 is opened to fill with Freon gas. It was something.

The problem is that it takes time and effort to connect and separate the pipes, resulting in poor workability.

Especially as more and more cars are equipped with car coolers these days, there are an extremely large number of cars equipped with conventional valves, and it is almost impossible to replace them with new valves.

``Problems to be solved by this invention'' This invention eliminates such drawbacks of the conventional system, allows easy connection of a Freon tank and a car cooler using a quick pipe joint, and also enables easy connection of a Freon tank to a car cooler. The purpose of this invention is to enable connection by screwing in the union nut of a known socket with a union nut that is attached to the tip of a pipe.

``Means for solving the problem'' The present invention has a male thread connected to the cooling system at the base, and a valve inside the tip that opens with the pressure of a valve push rod installed inside the socket. The socket with a locking ball is provided with a male threaded part on the tip that screws into the union nut of the socket with a union nut, and the socket with a locking ball is provided with a locking ball that is restrained and released by a sleeve provided on the outer periphery. An endless groove for locking a locking ball is provided on the outer periphery at a position symmetrical to the male thread, sandwiching a large diameter part that is larger in diameter than the outer diameter of the male thread. It is something.

``Function'' In this way, this plug is provided with a male thread that engages with the nut of the socket with a union nut, and an endless groove that engages with the locking ball of the socket with a locking ball. It can also be connected to

"Embodiment" An embodiment of this invention will be explained with reference to the drawings.A male thread 12 is formed on the outer periphery of the base of the cylindrical main body for fixing it to an evaporator or a car cooler (not shown), and a male thread 12 is formed at the tip of the thread 12 to fix it to an evaporator or a car cooler (not shown). A tightening portion 13 is provided for screwing the main body into an evaporator or the like.

Further, a male thread portion 14 is formed approximately on the outer periphery of the tip of the main body at the same position as the thread 3 of the conventional one and at a position where the union nut of a known socket with a union nut is screwed. A slightly larger diameter portion 15 provided between the rear portion of the strip portion 14 and the tightening portion 13 is provided with a socket with a locking ball that is provided with a locking body that is restrained and released by a sleeve. The plug 12 is provided by forming an endless groove 16.

Reference numeral 17 is a known valve that is screwed into a threaded groove 18 provided inside the main body, and the insect 17a at the tip abuts against and retreats from a valve push rod 27, which will be described later, to open the valve and release the insect. This valve is closed by releasing the pressure on 17a.

FIG. 3 shows a socket 35, which is attached to the tip of a pipe 21 connected to a Freon tank (not shown), and has a small-diameter cylindrical portion 24 inside a male body 23 that has a mounting tube 22 at the rear. A valve 26 that opens and closes the valve port 25 provided at the tip of this cylindrical portion is installed in this cylindrical portion so as to be movable back and forth in the axial direction, and a valve push rod 27 that protrudes from the tip of this valve 26 is attached to the male body. It protrudes into the cavity 20 provided inside 23.

Reference numeral 28 denotes a movable cylinder which is located between the cylinder part 24 and the inside of the male main body, and is housed so as to be able to move back and forth by springing from the rear with a spring 29. An annular seal 30 is attached to the inner surface approximately at the middle of this movable cylinder. .

A plurality of tapered holes 31, 31 are provided at appropriate intervals on the outer periphery of the male main body 23 from the outside toward the center, and a locking body 32. 32 are fitted loosely into each other, and the sleeve 32 that regulates the locking body is attached to the outer periphery of the tip of the male main body 23 by a spring 34 so as to be able to move back and forth.

Next, to explain the operation of this embodiment, the locking body 32
．． 32, as shown in FIG. 3, are each pushed up in the radial direction by the outer peripheral surface of the tip of the movable cylinder 26, which is moved forward by the elastic force of the spring 9.

Next, when the tip of the plug 11 is inserted into the cavity 20 of this socket, the periphery of the tip of the plug is seated on the seal 30 inside the socket, and the tip side of the large diameter portion 15 of the plug is placed on the tip surface of the movable cylinder 28. The movable cylinder is engaged with the spring 29 and retreated toward the mounting cylinder, and the insect 17a of the valve 17 inside the plug is removed.
and the valve lever 27 of the valve in the socket to open both valves 26.17, and at the same time engage the locking body 32.32 in the endless groove 16 provided on the outer periphery of the plug, and the sleeve 33 is opened. The elastic force of the spring 34 moves the plug 1 forward to the locking method and presses several balls toward the center of the socket 35.
1 and the socket 36 are connected and fixed.

Next, when separating the two, attach the sleeve 33 to the spring 3.
4, the movable cylinder 28, which is moved forward by the spring 29 in the socket, pushes up the locking body 32, which has become free in each tapered hole 31, toward the outer circumference, so that the plug 11 is The cavity 20 is evacuated and at the same time both valves 26, 17 are closed.

In addition, when connecting the union nut of a socket with a union nut attached to the end of a hose connected to a conventional Freon tank to this plug 11, the second threaded portion 14 of the plug 11 is used to screw the union nut. Just let it happen.

``Effect of the invention'' This invention has the effect that it can be used with either socket, whether it is a socket with a union nut or a socket with a locking ball, as required.

Moreover, since the connection part connected to the cooling system provided at the base of the plug is an independent male thread, the plug of this invention can be firmly fixed to the cooling system, and in this way it is firmly fixed. For this plug, the sockets of the above two types are
Since both can be easily attached and detached, this invention can improve the efficiency of refrigerant replenishment work by easily connecting and separating these sockets connected to the refrigerant tank.

[Brief explanation of drawings]

FIG. 1 is a front view of the entire device, FIG. 2 is a sectional view thereof, FIG. 3 is a sectional view of a socket, and FIG. 4 is a sectional view of a conventional plug. 11...Plug, 12...Male thread connecting to cooling system, 14...Male thread connecting with union nut, 15...Large Diameter part, 16...
・Endless groove, 17...Valve, 32...Lock body, 33...Sleeve, 5...Socket.

Claims (1)

[Scope of utility model registration request] A plug is provided with a male thread 12 connected to the cooling system at the base, and is equipped with a valve 17 inside the tip side that opens by the pressing force of a valve push rod 27 provided inside the socket, and the tip is equipped with a union nut. An endless socket for locking the locking ball of a socket with a locking ball, which is provided with a male threaded part 14 that screws into the union nut of the socket, and has a male locking ball 32 that is restrained and released by a sleeve 33 provided on the outer periphery. A plug in which a groove 16 is provided at a position symmetrical to the male threaded portion 14 on the outer periphery, sandwiching a large diameter portion 15 formed to have a larger diameter than the outer diameter of the male threaded portion 14.