JPH07260070A - Safety mechanism in connecting device of air piping - Google Patents

Abstract

PURPOSE:To effectively prevent any accident such that a piping jumps around when a plug is taken off by preventing a plug from taking off from a socket when compressed air is supplied into an air piping. CONSTITUTION:A slide cover 6 is provided on a pipe part 4 which continues to a socket 1 so that it may be capable of sliding between a first position for retreating from a socket slider 3 along axial direction of a pipe part 4 and a second position for covering the socket slider 3. A space part which is communicated with the inside of the pipe part 4 is formed between the base part inner surface of a slide cover 6 and the outer surface of the pipe part 4, and the slide cover 6 is spring-energized to the first position when compressed air is not supplied in the space part, and the slide cover 6 is moved to the second position opposing to spring-energization by air pressure when the compressed air is supplied into the space part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air pipe connecting device for connecting a socket connected to a compressed air supply source and a plug connected to a pneumatic tool or the like, in which compressed air is still supplied to the air pipe. The present invention relates to a safety mechanism that prevents the plug from being removed from the socket in a state.

[0002]

2. Description of the Related Art Generally, when a connecting device composed of a plug and a socket is used for an air hose (air pipe) for connecting a compressed air supply source to a pneumatic tool, etc., the plug is removed from the socket while the compressed air remains in the air hose. When compressed air is jetted from the plug vigorously and the air hose jumps out, and if you accidentally release your hand from the air hose, the air hose may jump and become like a whip, causing a phenomenon of dancing, which is extremely dangerous. Is.

Further, a socket slider is slidably arranged in the socket, and a plug can be inserted into the socket by sliding the socket slider in one direction.
A mechanism is provided to prevent the inserted plug from coming off by returning to the original position. Since the socket slider is exposed to the outside, even if an unexpected external force acts on the socket slider when the air piping is filled with compressed air, such as when this socket slider accidentally hits against something and slides. , The plug may come off the socket, which is dangerous.

[0004]

An object of the present invention is to solve the above problems and to prevent the plug from being removed from the socket when compressed air is supplied into the air pipe, so that the pipe jumps when the plug is removed. It is an object of the present invention to provide a safety mechanism in an air pipe connecting device capable of effectively preventing the above accident.

[0005]

To achieve the above object, the safety mechanism in the air pipe connecting device according to the present invention combines a socket connected to a compressed air supply source and a plug connected to a pneumatic tool or the like. At the time of insertion, sliding the socket slider slidably arranged at the tip of the socket in one direction enables the plug to be inserted into the socket, and the plug is inserted by returning to the original position. In an air pipe connecting device for preventing a plug from coming off, in a pipe portion continuous with the socket, a first position retracted from the socket slider along an axial direction of the pipe portion and a second position covering the socket slider are provided. A slide cover slidable between the position and a position is provided, and the inside of the pipe portion is communicated between the inner surface of the base portion of the slide cover and the outer surface of the pipe portion When the compressed air is not supplied to the space, the slide cover is spring-biased to the first position, and when the compressed air is supplied to the space, the slide pressure is applied to the slide cover. The cover is moved to the second position against the spring bias.

Instead of the slide cover, it can slide along the axial direction of the pipe portion between a first position retracted from the socket slider and a second position engaged with the socket slider. A slide stopper is provided, and when the compressed air is not supplied to the space, the slide stopper is spring-biased to the first position, and when the compressed air is supplied to the space, the air pressure causes the slide stopper to move. The slide stopper may be moved to the second position against the bias of the spring.

[0007]

According to the invention of claim 1, when the compressed air is not supplied to the air pipe, the compressed air is not supplied to the space of the pipe portion continuous with the socket. The slide cover is biased to the first position by the compression spring. Therefore, the socket slider is exposed to the front of the slide cover and can be freely slid, so that the work of connecting or disconnecting the plug can be performed in the above-described manner. Due to the work in this case, the plug-side air hose connected to the pneumatic tool or the like does not jump.

On the other hand, when the plug is connected to the socket and the compressed air from the compressed air supply source is supplied to the air hose on the plug side through the pipe portion, the slide cover receives the spring force of the compression spring. Against it moves to the second position and covers the socket slider. Since the socket slider cannot be controlled from the outside, it is possible to effectively prevent malfunctions such as removing the plug from the socket while compressed air remains inside the pipe, or the plug coming off due to an unexpected external force acting on the socket slider. it can.

According to the second aspect of the invention, when the compressed air is not supplied to the air pipe, the slide stopper is biased to the first position by the compression spring, and the socket slider slides freely. It can be operated and the air hose on the plug side will not jump.

On the other hand, when compressed air is supplied to the air pipe, the slide stopper moves to the second position and engages with the socket slider, so that the socket slider cannot slide and the plug slides. Can't be removed,
Malfunction is prevented.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of an air pipe connecting device according to the present invention, and FIG.
It is a sectional view of a connecting device in the state where compressed air has entered the inside of piping.

The connecting device comprises a socket 1 connected to a compressed air supply source (air compressor) and a plug 2 connected to a pneumatic tool or the like, and a socket slider slidably arranged at the tip of the socket 1. The plug 2 can be inserted into the socket 1 by sliding the plug 3 in one direction, and by returning to the original position, the inserted plug 2 is coupled in a state in which it is prevented from coming off. When the plug 2 is separated from the socket 1, the socket slider 3 may be slid similarly and then the plug 2 may be removed. The connection device using the socket slider is well known from FIGS. 1 and 2 of Japanese Utility Model Publication No. S49-36017.

A pipe portion 4 connected to a compressed air supply source is connected to the socket 1, and an air hose 5 connected to a pneumatic tool or the like is connected to the plug 2.

In the pipe portion 4 continuing from the socket 1, a first position (see FIG. 2) retracted from the socket slider 3 along the axial direction of the pipe portion 4 and a second position for covering the socket slider 3 are provided. There is provided a slide cover 6 which is slidable with respect to the position (see FIG. 3).

The slide cover 6 is formed by connecting a cover body 6a and a tubular portion 6b at the base thereof, and the tubular portion 6b is slidable around the tubular portion 4 along the axial direction of the tubular portion 4. Is fitted to. A compression spring 8 is arranged between the tubular portion 6b and the flange portion 7 at the tip of the tube portion 4.

The inner diameter of the cylindrical portion 6b is formed with a large diameter on the open end side through the step 9, and correspondingly, the outer diameter of the tube portion 4 is formed with a small diameter on the open end side through the step 9. There is. Then, due to the fitting of the tubular portion 6b and the pipe portion 4, a space S is provided between the inner surface of the tubular portion 6b and the outer surface of the pipe portion 4.
Is formed, and the space portion S communicates with the inside of the pipe portion 4 through the communication hole 10. In addition, 11 is a seal ring.

In the above construction, when the compressed air is not supplied to the air pipe as shown in FIG. 1, the compressed air is not supplied to the space S, so the slide cover 6
Is urged to the first position by the compression spring 8. Therefore, the socket slider 3 is exposed in front of the slide cover 6 and can be freely slid and operated, so that the work of connecting or disconnecting the plug 2 with the plug 2 can be performed in the above-described manner. Due to the work in this case, the air hose 5 on the plug 2 side does not jump.

On the other hand, as shown in FIG. 2, when the plug 2 is connected to the socket 1 and the compressed air from the compressed air supply source is supplied to the air hose 5 through the pipe portion 4, the communication hole 10 is used. It is also supplied to the space S. At this time,
The air pressure of the compressed air acts on the stepped portion 9 of the tubular portion 6b, the tubular portion 6b slides against the spring force of the compression spring 8, and the cover body 6a of the slide cover 6 moves to the second position. Move to the position and cover the socket slider 3. Since the socket slider 3 cannot be controlled from the outside, the plug 2 may be removed from the socket 1 while compressed air remains in the pipe, or the plug 2 may be removed due to an unexpected external force acting on the socket slider 3. Malfunctions can be effectively prevented.

In order to prevent the malfunction of the socket slider 3, as shown in FIGS. 3 and 4, the first retracting from the socket slider 3 along the axial direction of the pipe portion 4 is performed.
Is provided (the position of FIG. 3) and the second position (the position of FIG. 4) that engages with the socket slider 3 is provided with a slide stopper 12 to supply compressed air to the space S. If not, the slide stopper 12 is urged by the compression spring 8 to the first position, and when compressed air is supplied to the space S, the air pressure of the slide stopper 12 resists the spring urge. Then, it may be configured to move to the second position.

According to the above construction, when the compressed air is not supplied, the slide stopper 12 is at the first position, so that the socket slider 3 can slide as shown in FIG. On the other hand, when compressed air is supplied, the slide stopper 12 moves to the second position and engages with the socket slider 3 as shown in FIG. 4, and the socket slider 3 cannot slide. Since the plug 2 cannot be removed, malfunction is prevented.

[0021]

According to the inventions of claims 1 and 2, the plug cannot be removed from the socket when the compressed air remains in the air pipe, so that accidents such as jumping of the air pipe are effectively prevented. can do.

[Brief description of drawings]

FIG. 1 is a sectional view of an air pipe connecting device according to the present invention.

FIG. 2 is a cross-sectional view of the connection device in which the socket and the plug are connected and compressed air is contained in the pipe.

FIG. 3 is a sectional view of another embodiment of the present invention.

FIG. 4 is an explanatory view of an operation mode of the connection device.

[Explanation of symbols]

 S space 1 socket 2 plug 3 socket slider 4 tube 6 slide cover 8 compression spring 12 slide stopper

Claims (2)

[Claims] 1. A socket connected to a compressed air supply source,
When connecting a plug connected to a pneumatic tool etc., by sliding the socket slider slidably arranged at the tip of the socket in one direction, the plug can be inserted into the socket. In the connecting device of the air pipe for preventing the inserted plug from coming off by returning to the position of (1), the pipe part continuous to the socket has a first retracting part from the socket slider along the axial direction of the pipe part. A slide cover slidable between a position and a second position covering the socket slider is provided, and the inside of the pipe portion is communicated between the inner surface of the base portion of the slide cover and the outer surface of the pipe portion. When the compressed air is not supplied to the space, the slide cover is spring-biased to the first position, and the compressed air is supplied to the space. Can safety mechanism in the connection apparatus of the air pipe, characterized in that for moving the slide cover by the air pressure in the second position against the biasing said spring. 2. Instead of the slide cover, it is slidable between a first position retracted from the socket slider and a second position engaged with the socket slider along the axial direction of the pipe portion. A slide stopper is provided, and when the compressed air is not supplied to the space portion, the slide stopper is spring-biased to the first position, and when the compressed air is supplied to the space portion, the air pressure is applied to the slide stopper. The safety mechanism in the connecting device of the air pipe according to claim 1, wherein the slide stopper is moved to the second position against the bias of the spring.