JPH07229592A - Locking device for cap in quick joint - Google Patents

Abstract

PURPOSE:To restrict free movement of a cap by making it removable only when the specific positional relation is maintained between a plug and the cap. CONSTITUTION:A guide groove 8 formed of a longitudinal groove 81 and a groove 82 adjacent to the longitudinal groove 81 is formed in the opening end edge of a cap 2, and a setting ball 7 engaged with each groove is formed in a joint main body 1. A plug mounted in a joint main body 1 is. removed from/to the joint main body 1 on the basis of the positional relation of the setting ball 7 engaging with the guide groove 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a cap in a quick joint, and more specifically, it relates to a cap that controls attachment / detachment of a plug which is attachable / detachable to / from the body of the quick joint. The present invention relates to a cap locking device that can be attached and detached only when the plug and the cap maintain a predetermined positional relationship.

[0002]

2. Description of the Related Art A conventional quick joint will be described with reference to FIG. The quick coupling 10 is mainly composed of a main body 1 ', a cap 2', a plug 3 ', a ball 4'and a hose connector 5'connected to the plug 2'.

Reference numeral 6'denotes a check valve. In the conventional quick coupling, when the plug 3'is attached or detached, the cap 2'is moved in the left-right direction (arrow) in the figure, and with this movement, this is moved through the ball 4'displaced in the up-down direction in the figure. I was doing.

[0004]

In the case of the conventional quick joint shown in FIG. 6, since the plug 3'is allowed to rotate freely when mounted, there is an advantage that the twist phenomenon does not occur, but the cap 2 ' Is not restricted to move in the left-right direction (arrow direction) in the figure, so when this cap 2'is moved in the dissociation direction of the plug by some external force, the disassociation direction applied to the check valve 6 ' There is a risk that the plug 3'may fall off from the main body 1'because of the pressure to cause an accident. The present invention solves this drawback and is intended to provide a locking device for restricting free movement of the cap.

[0005]

MEANS FOR SOLVING THE PROBLEMS As the cap locking means according to the present invention, a groove having a desired width is formed at the opening edge of the cap on the main body side, and a longitudinal groove having a desired length is formed at one end of the groove. In the guide groove, a guide ball that is erected on the surface of the joint body is fitted.

[0006]

In the locking device of the present invention, when the plug is mounted on the main body, the guide ball on the surface of the main body is disengaged from the longitudinal groove of the cap by rotating the cap in the circumferential direction by a desired amount, and the guide ball is inserted into the groove. Since it is located, it does not act to separate the plug from the main body even if an external force in the longitudinal direction is applied.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows only the joint body and the plug is removed from the body. FIG. 2 shows a state in which the plug is attached to the joint body.

The reference numerals of FIGS. 1 and 2 are as follows: 1 is a joint body, 2 is a cap, 3 is a plug, 4 is a ball, 5 is a hose connector, 6 is a check valve, 7 is a planting ball, Reference numeral 8 indicates a guide groove. The planting ball 7 is provided at a predetermined position on the main body.
The installation position is determined in relation to the guide groove formed in the opening edge of the cap, which will be described in detail later.

Details of the guide groove 8 will be described below with reference to FIGS. 3, 4 and 5. As is clear from the above figures, the guide tank 8 has a groove 82 having a desired width 1 formed at the opening edge of the cap 2 and a longitudinal groove having a desired depth D from one end of the groove 82. And 81.

The operation when the cap thus formed is installed in the joint body will be described below.
As shown in FIG. 1, in a state where the plug is detached from the joint body 1, the planting ball 7 is a longitudinal tank 81 of the guide tanks 8 of 2.
Is located at the deepest part (see 7'in FIG. 5), so that the cap 2 is kept fixed so that it cannot freely rotate with respect to the joint body.

If the plug 3 is attached to the joint body in this state as shown in FIG.
To the joint body 1 via. This coupling moves the cap 2 to the desired depth to the left in FIG. With this movement, the engagement relationship between the planting ball 7 and the cap 2 changes, and the planting ball 7 that has engaged with the longitudinal groove 81 of the cap 2
Is a groove strip 82 formed so as to be connected to the tip of the longitudinal groove.
Maintained in the position.

The lock function according to the present invention is to rotate the cap 2 in the above-mentioned state with respect to the planting ball 7 by a desired width,
Even if an external force acts in the direction of the arrow by setting the engagement relationship between the planting ball and the longitudinal groove to the position shown by reference numeral 7 ″ in FIG. 5, the cap 2 is opened by the planting ball 7 ″ and the groove 82. Is prevented from moving to. The shapes of the planting ball and the guide groove can be arbitrarily designed.

[0013]

According to the present invention, a guide groove formed by a longitudinal groove and a groove is formed at the opening end edge of a cap, and a locating ball engaging with this groove is provided on the joint body, so that after the plug is mounted. It is possible to prevent the cap from moving unintentionally and, as a result, to prevent the plug from being removed except when necessary.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a joint body showing an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part when a plug is attached, showing an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a main part of a cap.

FIG. 4 is a right side view of FIG.

5 is a cross-sectional view taken along line I-I of FIG.

FIG. 6 is a cross-sectional view of a main part showing a conventional example.

[Explanation of symbols]

 1 Joint Main Body 2 Cap 3 Plug 4 Ball 5 Hose Connection Metal Fitting 6 Check Valve 7 (7 ', 7 ") Erecting Ball 8 Guide Groove 81 Longitudinal Groove 82 Groove

Claims (1)

[Claims] 1. A longitudinal groove and a guide groove formed by a groove connected to the tip of the longitudinal groove are formed at an opening edge of a cap mounted on the joint body, and engage with the guide groove. A quick-joint characterized in that a planting ball is formed in the joint body, and the cap is not rotated with respect to the joint body when the plug is removed, and the cap is not moved when the plug is attached. Cap locking device.