JPH0942562A - Tube falling prevention mechanism in quick disconnect tube coupling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance safety by letting a tube falling prevention member function for preventing a chuck member from being released after a tube has been inserted and pinch-locked by the chuck member, and thereby preventing the tube from being carelessly fallen out because of tube inner pressure during dental treatment. SOLUTION: A tube 20 is connected to a quick disconnect tube coupling 10. Subsequently, a chuck releasing member 12 is returned to the opposite direction of an arrow head A, and a spacer member 30 is interposed between the tube end of the tube coupling 10 and the collar part 12a of the chuck releasing member 12. The interposition of the spacer member 30 prohibits the chuck releasing member 30 from being moved even if pressing force is applied to the chuck releasing member 12 in the direction indicated by an arrow head B. Therefore, the chuck will not be opened. The spacer member 30 is so constructed that an elastic member L width roughly equivalent to a clearance W appearing between the collar part 12a of the chuck releasing member 12 and the tube end of the tube coupling 10 when the chuck releasing member 12 is retreated, is formed out of end parts 32 which are elastically opened when the fitting is mounted/demounted, and of a grip part 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube pull-out prevention mechanism for a one-touch tube joint, and more specifically,
The present invention relates to a tube pull-out prevention mechanism in a one-touch tube joint that prevents the tube connected to the one-touch tube joint from coming off from the tube joint even when unexpected conditions overlap.

[0002]

2. Description of the Related Art FIG. 3 is a schematic cross-sectional view for explaining an example of a one-touch tube joint to which the present invention is applied. In the figure, 10 is a one-touch tube joint and 20 is connected to the one-touch tube joint 10. When the tube 20 is press-inserted into the one-tube end portion 10A side of the one-touch tube joint 10 from the direction of the arrow A, the tube 20 is scissored by the scissor stopper portion 11a of the chuck member 11, and thereafter,
Even if the user tries to pull out the tube 20, the scissors stopper portion 11a bites into the tube 20 and the tube 20 cannot be pulled out. In order to pull out the tube 20, the chuck release member 12 is pushed in the direction of the arrow B, and the scissor stop portion 11a of the chuck member 11 is pushed open at the tip of the chuck release member 12 so that the scissor stop portion 11a is opened. In this state, the tube 20 is pulled out.

The one-touch tube joint as described above is
Currently, it is used in various devices, but especially in dental treatment units, it has been proposed to autoclave the tubes that are in contact with the hands of doctors, etc. from time to time to perform high-pressure steam sterilization. One-touch tube fittings are used, and sometimes the tube 20 is removed and autoclaved.

[0004]

In the one-touch tube joint as described above, the chuck release member 12 is pushed in the direction of arrow B due to some unexpected situation during use, and in this state, the tube 20 is attached to the tube 20.
When a force is applied in the direction to pull out the
If the internal pressure suddenly rises for some reason, the tube 20 will come off and the liquid inside will gush out, sprinkle on the doctor or patient, stain the surroundings, and even interrupt the work, and even at risk. is there.

The present invention has been made in view of the above-mentioned circumstances, and in particular, when it is used in a dental treatment unit or the like, the unexpected state as described above does not occur and the safety of dental treatment work is aimed at. It was made for the purpose.

[0006]

According to a first aspect of the present invention, there is provided a chuck member which is disposed on an inner wall of a tube end into which a tube is inserted and which scissors the tube when the tube is inserted, and the tube end. A tubular chuck opening member that is movably mounted in the axial direction of the tube end and that opens the chuck member when pressed and inserted into the tube end, and the tube is chucked through the chuck opening member. The tube is inserted over the scissors stop of the member to prevent the tube from coming off by the scissor member, and when the tube is pulled out, the chuck opening member is pushed into the tube end. In the one-touch chuck joint in which the tube is inserted and the chuck member is opened to release the scissors of the tube so that the tube comes out from the tube end, the tube is inserted and the chuck member Has a tube pull-out prevention mechanism that prevents the chuck opening member from being press-fitted into the tube end after being scissored by the scissors, and the tube is prevented by the tube pull-out prevention mechanism from opening the chuck member. Is to be prevented from coming off from the pipe end.

According to a second aspect of the present invention, in the first aspect of the present invention, the chuck opening member has a collar on the outside of the tube end, and the tube pull-out prevention mechanism includes an end surface of the tube end and the collar. The spacer member is interposed between the chuck opening member and the tube to prevent the chuck opening member from being inserted into the tube end, so that the tube does not open even if the chuck opening member is pushed. , The tube is more reliably prevented from coming off by simple means.

According to a third aspect of the present invention, in the second aspect of the present invention, the spacer member is a clip member for sandwiching the chuck opening member, whereby the spacer member can be easily attached and detached, and further, the spacer can be attached. By making the member visible from the outside, it is possible to easily confirm that the spacer member is mounted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic sectional view for explaining one embodiment of the present invention. In the drawing, 30 is a spacer member added according to the present invention. In this way, after connecting the tube 20 to the one-touch tube fitting 10, the chuck opening member 20 is returned, and the spacer member 30 is provided between the end portion of the tube end 10A of the tube fitting 10 and the collar portion 21 of the chuck opening member 20. Even if the chuck releasing member 20 is pressed in the direction of the arrow B after that, the chuck releasing member 20 is prevented from moving, and thus the chuck is not opened.

FIG. 2 is a perspective view showing an example of the spacer member 30. FIG. 2 (A) shows a collar portion 21 of the chuck opening member 20 having a width L when the chuck opening member 12 is retracted. It is composed of a plate-shaped elastic member that is approximately equal to the distance W between the end surface of the tube end 10A of the tube joint 10 and
A grip portion 31 is provided at a rear end portion, and the grip portion 31 is pushed to push the spacer member 30 from the front end portion 32 into the space W, or the grip portion 31 is pulled out. Here is an example. 2B, a sphere 41 is provided at the open end of a partially open ring 40 having an elastic diameter D that is substantially equal to the spacing W, and the spheres 41, 41 are pushed open to open the spacer member 40. Here is an example of attaching and detaching.

[0011]

According to the invention of claim 1, a chuck member is provided on the inner wall of the tube end into which the tube is inserted, and which holds the tube scissors when the tube is inserted, and the chuck member inside the tube end. A tubular chuck opening member that is mounted so as to be movable in the axial direction of the tube end and that opens the chuck member when it is pressed and inserted into the tube end; and through the chuck opening member, the tube is sheared by the chuck member. To prevent the tube from coming off by inserting the tube over the stopper and locking the tube with the chuck member, and when pulling out the tube,
In the one-touch chuck joint in which the chuck release member is pressed and inserted into the tube end to open the chuck member to release the scissors of the tube so that the tube comes out of the tube end, the tube is inserted, After the scissors are stopped by the chuck member, it has a tube pull-out prevention mechanism for preventing the chuck release member from being press-fitted into the tube end, and the tube pull-out prevention mechanism does not open the chuck member. Therefore, it is possible to reliably prevent the tube from coming off the tube end.

According to the second aspect of the present invention, the chuck opening member has a collar on the outside of the tube end, and a tube pull-out preventing mechanism is inserted between the end surface of the tube end and the collar to chuck the chuck. Since the opening mechanism is the spacer member which is prevented from being press-fitted into the tube end, the tube pull-out preventing mechanism can be realized with a simple structure.

According to the invention of claim 3, since the spacer member is a clip member for sandwiching the chuck opening member, the clip member can be visually observed from the outside, and the spacer member can be easily attached and detached. Not only that, but you can easily check whether the tube is properly prevented from coming off.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of an essential part showing an example of a one-touch tube joint showing a state in which a spacer member according to the present invention is inserted.

FIG. 2 is a schematic perspective view showing an example of a spacer member suitable for use in implementing the present invention.

FIG. 3 is a schematic sectional view of an essential part showing an example of a one-touch tube joint to which the present invention is applied.

[Explanation of symbols]

10 ... One-touch tube fitting, 11 ... Chuck member,
12 ... Chuck release member, 20 ... Tube, 30 ... Spacer member.

Claims (3)

[Claims] 1. A chuck member, which is disposed on an inner wall of a tube end into which the tube is inserted, and which holds the tube scissors when the tube is inserted, and a movable inside the tube end in an axial direction of the tube end. And a tubular chuck opening member that opens the chuck member when it is pressed into the tube end.
The tube is inserted through the chuck opening member over the scissors locking portion of the chuck member, and the tube is scissored by the chuck member to prevent the tube from coming off.
When pulling out the tube, a one-touch chuck joint in which the chuck releasing member is pressed and inserted into the tube end to open the chuck member to release the scissors of the tube so that the tube can be pulled out from the tube end. A tube removal prevention mechanism for preventing the chuck opening member from being press-fitted into the tube end after the tube is inserted and scissored by the chuck member. A tube disconnection preventing mechanism in a one-touch tube joint, characterized in that the tube is prevented from coming off from the tube end by not opening the chuck member. 2. The chuck releasing member has a collar on the outside of the tube end, and the tube pull-out preventing mechanism is inserted between the end surface of the tube end and the collar to allow the chuck releasing mechanism to operate. The tube pull-out prevention mechanism in the one-touch tube joint according to claim 1, wherein the spacer member is a spacer member that prevents the tube end from being inserted into the tube end. 3. The tube pull-out prevention mechanism for a one-touch tube joint according to claim 2, wherein the spacer member is a clip member that holds the chuck opening member.