JPH084967A - Plug for quick-disconnectable coupling - Google Patents

Abstract

PURPOSE:To prevent occurrence of such a risk that a hose runs amuck being caused by a high pressure air ejected from the hose connected to an air compressor so as to harm or damage a person, an object or the like therearound when a plug of the hose is pulled out from a socket. CONSTITUTION:Holes 2 are radially formed in the fitting part 1a of a plug 1, extending from the outer periphery to the inner passage of the fitting part 1a, and a partition wall 3 is arranged for blocking the inner passage at a position between the front and rear ends of the holes 2. An O-ring seal 5 is fitted on the fitting part 1a in rear of the holes 2. When the plug 1 is fitted into a socket 6, high pressure air is fed from the socket 6 into the inner passage of the plug 6 in rear of the partition wall 3 through the holes 2. When the plug 1 is disconnected from the socket 6, the compressed air is radially discharged out from a hose and the inside of the plug 1 through the holes 2, and accordingly, no thrust hose is exerted to the plug 1, thereby it is possible to prevent the hose and the plug 1 from running amuck.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quick joint, and more particularly to a quick joint plug used for connecting air piping.

[0002]

2. Description of the Related Art Conventionally, an air compressor and a hose such as an air tool are connected through a quick joint, a socket for the quick joint is provided on the side of the air compressor, a plug of the quick joint is attached to the hose, and the hose is connected to the side of the air compressor. Can be quickly attached and detached. When the plug is inserted into the socket, the tip of the plug opens the self-sealing valve of the socket and at the same time the socket and the plug are joined. When removing the hose from the socket, sliding the lock ring of the socket will disengage the plug from the socket and close the self-sealing valve of the socket.

[0003]

When removing a hose connected to an air compressor, high-pressure air in the hose connected to a terminal such as an air tool is ejected from the plug, and the hose is activated by the reaction force of the ejected air. This may damage people and items around them. On the other hand, if a self-sealing valve is provided on the plug and high pressure air in the removed hose is sealed to prevent air from spouting from the plug,
Since the terminal can be driven by the high-pressure air sealed in the hose in a state where the hose is removed from the air compressor, it is not preferable because a nailing machine or the like may accidentally cause an accident.

[0004] Therefore, there is a technical problem to be solved in order to reduce the propulsive force of the ejected air at the time of removing the hose to prevent the unexpected movement of the hose and to eliminate the risk of injuring an operator or the like. The present invention aims to solve the above problems.

[0005]

DISCLOSURE OF THE INVENTION The present invention is proposed in order to achieve the above-mentioned object, and in a plug of a quick joint for connecting an air pipe, an outer periphery is provided in the vicinity of a tip of a fitting portion of the plug. A plurality of holes penetrating from the surface to the inner peripheral surface are provided in a radial manner, and a partition wall for blocking a flow path is provided in the fitting portion and at a front-rear intermediate portion of the hole to form a bypass flow path passing through the hole, A plug for a quick joint, characterized in that a seal ring is fitted on the outer peripheral surface of the fitting portion and on the rear side of the hole.

[0006]

In the fitting portion of the plug into the socket, holes radially connecting the flow path and the outside are provided radially. Further, the partition wall that blocks the flow path is disposed at a position that divides the hole into two parts, the front part and the back part. When the plug is fitted into the socket, the outer periphery of the fitting portion of the plug is covered by the socket, and the hole forms a bypass passage communicating with the front and rear of the partition wall. The high pressure air on the socket side is supplied to the plug side through the bypass passage. When the plug is removed from the socket, the outer peripheral surface of the fitting part of the plug is opened, and the high pressure air in the plug and the hose connected to the plug is discharged radially from the hole to the periphery of the plug. Air is not discharged from the opening because it is blocked from the section by the partition wall. Therefore, no propulsive force acts on the plug, and the plug and the hose do not rock.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described in detail below with reference to FIG. 1A and 1B show a plug 1 of a quick joint, in which a fitting portion 1a is formed at a front portion (right side in the drawing) of the plug 1 and a hose mounting portion 1b is formed at a rear portion thereof. As for the shape of the rear portion, in addition to the hose mounting portion 1b shown in the figure, a female screw portion 1c and a male screw portion are provided as shown in FIG. 3 depending on the application. As shown in FIG. 1, the fitting portion 1a has holes 2, 2, 2, 2 which are long in the front-rear direction and are radially formed with respect to the axis.
A partition wall 3 is provided in the pipeline. The partition wall 3 has holes 2,
The pressure fluid in the front chamber or the rear chamber of the partition wall 3 is located in the front-rear intermediate portion of 2, 2, 2, and is radially discharged through the holes 2, 2, 2, 2. In addition, the holes 2, 2, of the fitting portion 1a
An annular groove 4 for mounting a seal ring is formed on the outer peripheral surface rearward of 2, 2 and an O-ring 5 is mounted in the annular groove 4.

FIG. 2 shows a plug 1 with a sealed tip socket 6
When the plug 1 is inserted into the opening of the socket 6 by pulling the lock ring 7 of the socket 6 provided on the high-pressure air supply side rearward as shown in FIG. The front push plate 8a of the self-sealing valve 8 of the socket 6 is pushed to retract the self-sealing valve 8 and separate from the valve seat 9 to open the flow path.
The high-pressure air on the side of the socket 6 flows into the tip end opening of the plug 1, flows through the holes 2, 2, 2, 2 of the plug 1 whose outer peripheral surface is covered by the socket 6 to the rear flow path of the partition wall 3, and the hose ( It is supplied to an air tool or the like through (not shown). At this time, the O-ring 5 arranged behind the holes 2, 2, 2, 2
Is pressed against the mating surface of the socket 6, so that high-pressure air does not leak outside.

When the plug 1 is detached from the socket 6, the self-sealing valve 8 of the socket 6 causes the compression spring 1 to move.
The high pressure air in the plug 1 and the hose that has been closed by the urging force of 0 is opened holes 2, 2, 2, 2 as shown by arrows A, A in FIG.
No propulsive force is generated in the plug 1 by radially ejecting it from the latter half of the plug to the surroundings.

FIG. 3 shows a state in which the plug 1 is fitted in the socket 11 of another type. The socket 11 shown in the figure has a self-sealing spool valve 12 built therein, and by retracting the spool valve 12, high pressure air is supplied through the holes 13, 13 ,. When the plug 1 is inserted into the socket 11 of this type, the spool valve 12 is retracted by the tip of the plug 1 and the high pressure air is generated in the holes 2, 2, 2 of the plug 1 as in the case of the socket 6 shown in FIG. , 2 through.

As described above, the plug 1 has versatility that can be used without changing the design of the conventional sockets 6 and 11 of various types, and the handling and safety at the time of removal are improved. Is. It should be noted that the present invention should not be limited to the above-mentioned embodiment, and the number of holes 2 and the shapes of holes 2 and partition walls 3 can be modified in various ways, and the present invention extends to these modified ones. Is natural.

[0012]

As described in detail in the above-mentioned one embodiment, the present invention arranges air vent holes radially on the outer peripheral surface of the fitting portion of the plug of the quick joint and provides partition walls in the flow path.
When the plug is removed from the socket, the high pressure air in the plug and the hose is radially discharged to the surroundings when the plug is removed from the socket because the high pressure air flows through the hole before and after the partition wall. Therefore, the propulsive force due to the jetted air is not generated, and the possibility that the plug and the hose may vibrate and damage the surroundings is eliminated, which contributes to improvement in handleability and safety.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (a) is a front view of a plug, and (b) is a sectional view.

FIG. 2 is a cross-sectional view showing a fitted state of the plug and the socket shown in FIG.

FIG. 3 is a sectional view showing a fitted state of the plug shown in FIG. 1 and a socket having another shape.

[Explanation of symbols]

 1 Plug 1a Fitting part 2 Hole 3 Partition wall 4 Annular groove 5 O-ring

Claims (1)

[Claims] 1. A plug of a quick joint for connecting an air pipe, wherein a plurality of holes (2) penetrating from an outer peripheral surface to an inner peripheral surface are provided in the vicinity of a tip of a fitting portion (1a) of the plug (1). The holes (2) are provided radially, and partition walls (3) for blocking a flow path are provided in the fitting portion (1a) and in the front and rear intermediate portions of the holes (2).
A plug for a quick joint, characterized in that a bypass flow path is formed through the seal ring (5), and a seal ring (5) is fitted to the outer peripheral surface of the fitting portion (1a) and to the rear position of the hole (2).