JPH0435669Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention allows the pipe to be inserted simply by inserting it into the joint body, and the pipe can be removed by pushing the release button into the joint body. The present invention relates to a pipe joint cover that can be attached to a pipe joint that can be attached to a pipe joint.

[Prior Art] Conventionally, as an example shown in FIG. 2, a joint body 4 equipped with a fluid passage 3 is used as a pipe joint 2 for connecting a pipe 1 mainly made of synthetic resin or soft metal.
, a locking member 6, ... that locks on the outer surface of the tube 1 inserted from the tube insertion port to prevent the tube from being pulled out, and a locking member 6, ... that locks on the outer surface of the tube 1 inserted from the tube insertion port and prevents the tube from being pulled out. A pipe joint (hereinafter referred to as a one-touch pipe joint) equipped with a release button 7 that releases the lock of the pipe 1 and allows the pipe to be extracted is already known.

The above-mentioned known one-touch pipe fittings have the advantage of being easy to connect and remove pipes, but depending on the work environment in which the pipe joints are used, metals or their oxides may be scattered as sparks during welding, etc. Foreign matter such as dust particles, oil mist, fibers, and other dust floating in the air may adhere to the release button, and especially if they are caught in the gap 8 between the release button 7 and the joint body 4, the release button may be damaged. The bush may become inoperable, or it may adhere to the surface of the release bush 7 or a pipe near it, causing foreign objects to enter the release bush and cause problems when the pipe is re-inserted after being removed from the pipe fitting. There were problems such as.

[Problems to be solved by the invention] The invention prevents foreign matter from adhering to the release button, etc. of a one-touch pipe joint, and
The problem to be solved is to obtain a pipe joint cover that allows pipes to be connected to and removed from the pipe joint while attached to the one-touch pipe joint.

[Means for Solving the Problems] The present invention includes a fitting part for fitting a pipe fitting cover to be attached to a one-touch pipe fitting to a fitting body integrally formed of an elastic material, a covering part for covering a release button, and It consists of the above-mentioned mounting part and a telescopic part between the covering part, the covering part is provided with an opening for inserting a tube whose rim is in close contact with the outer periphery of the pipe, and the telescopic part is flexible in the axial direction of the cover. By providing a bent part that does not interfere with the pressing of the release button,
This solves the above problems.

[Function] When the mounting portion of the pipe joint cover is fitted onto the joint body, the release button is surrounded by the cover.

In this state, when the pipe is inserted into the joint body through the opening of the cover and connected to the pipe joint, the rim of the opening comes into close contact with the outer periphery of the pipe due to elasticity, so that it is completely covered with the release bush.

Furthermore, when the release button is pushed into the joint body by pressing the cover, the locking of the pipe by the locking member is released, so that the pipe can be pulled out from the one-touch pipe joint. In this case, although the bent portion is bent by the pressure of the covering portion, the bent portion is not caught in the gap between the release button and the joint body.

In addition, even if an external force is applied to the pipe connected to the pipe joint and the pipe moves slightly in the axial direction, the bent part of the cover will bend and stretch, so that the gap between the cover mounting part and the joint body and the rim of the opening will No relative movement occurs between the tubes.

[Embodiment] FIG. 1 shows a first embodiment of the present invention, in which a pipe joint cover 10 includes a cylindrical mounting portion 11 that fits into the joint body 4, and a covering portion 1 that covers the release button 7.
2, and an elastic part 13 between the attachment part 11 and the covering part 12, and each of these parts is integrally formed of an elastic material such as soft synthetic resin or synthetic rubber.

The mounting portion 11 has a fitting protrusion 15 on the inner surface of the cylindrical shape.
The cover 10 is attached to the joint body 4 by fitting the fitting protrusion 15 into the locking groove 4a formed on the outer periphery of the joint body 4.
It is not limited to this kind of groove structure.

The covering part 12 has an opening 1 in the center of which the tube 1 is inserted.
6, and the mouth edge of the opening 16, which has a diameter slightly smaller than the outside diameter of the tube, has a recessed sloped surface 18 that slopes toward the center and a notch 19 on the opposite side, so that the tip has a thin wall. A lip 20 is formed.

Further, the extensible portion 13 is provided with a bending portion 22 having an arcuate cross section that bulges out in the radial direction, so that the cover can be bent and expanded in the axial direction.

Note that the elastic material of the cover 10 may be subjected to appropriate flame retardant treatment.

When the fitting protrusion 15 of the cylindrical attachment part 11 is fitted onto the outer periphery of the fitting body 4, the pipe fitting cover 10 has the following properties:
The covering portion 12 is brought into contact with the outer surface of the release bush 7.

In this state, the tube 1 is passed through the opening 16 into the cover 1.
0 and into the release button 7 of the pipe joint, the tip of the pipe 1 will be inserted into the locking member 6,
... to connect the pipe 1 to the pipe fitting 2. In this case, since the tip of the lip 20 is thin, it is easy to insert it into the opening 16 of the tube 1, and when the tube 1 is connected to the pipe fitting 2, the lip 20 is elastically attached to the outer circumference of the tube 1. closely adhere to. When the tip of the lip 20 is bent inward of the cover as the tube is inserted, it does not come into contact with the release button 7 due to the presence of the notch 19. Therefore, when the tube 1 is inserted, the lip 20 does not come into contact with the release button 7. It will not get caught in the sliding gap of the release button 7.

In addition, when the release button 7 is pushed into the joint body through the covering part 12 in order to remove the pipe 1 from the pipe joint 2, the locking of the pipe 1 by the locking members 6, . . . is released, and the pipe 1 is released. However, in this case, the bent portion 22 bulges out in the radial direction and does not get caught in the gap 8 between the release button 7 and the joint body 4, so the release operation of the tube 1 is not smooth. be.

Furthermore, even if an external force is applied to the pipe 1 connected to the pipe joint 2 and the pipe 1 moves slightly in its axial direction,
Since the cover 10 follows the movement of the tube 1 by bending and stretching the bending portion 22, the cover 10 will not come off from the joint body 4 or the tight contact of the lip 20 with the outer circumference of the tube will not be impaired.

FIG. 2 shows a second embodiment of the present invention;
Attachment portion 31 in pipe joint cover 30 of embodiment
has a fitting hole with a regular hexagonal cross section in the thick outer wall, and is attached to the joint body 4 by fitting this fitting hole into the nut-shaped outer surface of the joint body 4.

On the other hand, the covering part 32 is provided with a lip 40 on the edge of the opening 36, and a protruding lip 43 protruding outward is integrally formed in a position close to the lip 40, so that the tube 1 can be inserted into the opening 36. Well, second
When the rim of the mouth is bent inward as shown in the right half of the figure,
Along with this, the protruding lip 43 is rotated toward the center. The outer periphery of the tube 1 is therefore sealed by both the lip 40 and the protruding lip 43 on the rim of the opening 36.

In this case, if the recessed step portion 9 is formed at the opening edge of the release button 7, the mouth edge of the opening 36 will be aligned with the pipe 1.
It will not get caught in the sliding gap between the release button 7 and the release button 7.

Further, the bent portion 42 of the cover is formed thinner than the attachment portion 31 and has a diameter reduced toward the covering portion 32 side. This bent portion 42 is also designed to prevent the release button 7 from getting caught in the gap 8 between the release button 7 and the joint body 4 when the release button 7 is pressed through the covering portion 32 for a pipe extraction operation. is formed.

Note that the other configurations and functions are the same as those of the first embodiment.

[Effects of the invention] The cover of the invention completely covers the release button, so even if the pipe fitting is used in a poor work environment with a lot of foreign objects and floating dust, the release button will not be exposed to foreign objects or other foreign objects. This prevents the tube from becoming inoperable due to adhesion, making it impossible to remove or insert the tube.

In addition, the covering part has an opening for inserting the pipe, and the extensible part has a bending part that can be freely bent and expanded in the axial direction of the cover, making it possible not only to connect and remove the pipe through the cover, but also to Even if external force is applied,
Since the cover does not come off the pipe joint or create a gap between it and the outer periphery of the pipe, there is no risk that the cover's sealing of the release button will be impaired.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the first embodiment of the present invention, showing the state in which it is installed in a one-touch pipe joint, and Fig. 2 is the second embodiment of the present invention, in which the right half shows the state with a pipe inserted. FIG. 10,30...Pipe joint cover, 11,31...
Attachment part, 12, 32...covering part, 13...extensible part, 16, 36...opening, 22, 42...bending part.

Claims (1)

[Scope of Claim for Utility Model Registration] By inserting the pipe into the joint body through the release button, the locking member provided on the joint body will lock onto the pipe, and by pushing the release button into the joint body, A pipe joint cover that is attached to a pipe joint that releases the locking of the pipe by the locking member and makes it possible to remove the pipe, the cover being fitted onto a joint body that is integrally formed of an elastic material. , a sheathing part that covers the release button, and an elastic part between the mounting part and the sheathing part, and the sheathing part is provided with an opening for inserting a tube whose lip is in close contact with the outer periphery of the tube, A pipe joint cover characterized in that the extendable part includes a bending part that is flexible in the axial direction of the cover and does not prevent the release button from being pressed.