JP3363586B2 - Piping connection fittings - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a connection of a metal pipe having a relatively small diameter of about 20 m / m or less, which is provided as a supply passage for oil supply and air supply in automobiles or various machines and devices. The present invention relates to a joint for use, and particularly to a holder provided inside the joint in connection with a one-touch system in which a pipe end is inserted as the joint.

[0002]

2. Description of the Related Art Conventionally, as a connecting joint of this kind, as shown in FIG. 7, a holder (17) provided inside the connecting joint is provided with an engaging hole (16) in an engaging wall (15). On the outer peripheral side of the engaging wall that extends through, the outer arm (1
6 ") was formed by an inner arm (17") having a claw-shaped locking wall (17 "') at its tip connected to a bent wall (17') formed at the top.

[0003]

Generally, as a holder for these joints, in connection with the one-touch connection method of the pipe, the annular bulging wall on the pipe side as the pipe is inserted has the inner arm of the holder (17). The inner arm (17 ") elastically returns to its original shape when it comes into contact with (17") and creates a bounce in the bent wall (17 '), and the bulging wall is inserted in place. The bulging wall portion is elastically pressed and engaged inside the joint, and therefore the bulging wall portion on the pipe side has a relatively high pushing-out force at the inner arm (17 ") when connecting the pipes. However, it is desirable to feel the positive connection completion, and the restoring force at the bent wall (17 ') is large to some extent for the inner arm (17 ") to completely return. This is a point that is required in terms of function.
However, in the above-mentioned conventional technique, the plate thickness is usually 0.
Bending wall made of thin stainless steel material of about 3 m / m (1
In relation to the structure simply formed by bending of 7 '), the deforming force at the bending wall is generally poor, and the response confirmation of the completion of connection at the time of pipe connection is insufficient, and the work of confirming its suitability is forced. Further, due to repeated connection and disconnection of pipes, the bending wall (17 ') part tends to have a problem of degrading the restoring force and making the holding function unstable.

The present invention has been made in view of the above problems of the prior art. The auxiliary arm enhances the deforming force and the restoring force of the bending wall including the inner arm (thrust resistance arm), and when connecting the pipes. A fitting for pipe connection that makes it possible to easily judge the suitability of the connection completion and make it easy to judge whether it is proper or not, and to reduce the "sagging" at the outer bent wall for a long period of time to stabilize the holding function. It is intended to be provided.

[0005]

In order to achieve the above object, the present invention penetrates inside the shaft core a stepped small diameter chamber and a large diameter chamber which are connected to the flow holes of the connecting cylinder wall on the tip side. And a seal ring and a bush member are internally provided in the small diameter chamber of the joint main body having the rear peripheral end portion of the large diameter chamber as a retaining wall, and a ring of pipe connected in the large diameter chamber. The engaging hole is formed in the shaft core portion of the front engaging wall that engages with the bulging wall portion, and is connected to the folding wall formed by the top portion of the outer arm that is inclined toward the rear and faces the peripheral side portion of the engaging wall. The bent wall portion is hooked on the locking wall portion on the joint body side by a holder provided with an inner arm whose tip is a pressure wall, and the pressure wall portion at the tip is a bulging wall portion of the pipe. In a connecting joint that is press-engaged with and elastically connected to the holding member, the holder is connected to the engaging wall portion and bent outward in an acute angle. The auxiliary arm is continuously provided and its tip end is brought into contact with the outer arm, or is bent inwardly in an overlapping manner with the inner arm and the auxiliary arm is continuously provided so that the tip end side is the bent wall portion. The gist of the present invention is a joint for pipe connection, which is configured so as to abut in a wrapped manner up to the above.

[0006]

Since the present invention is constructed in this way, the holder is connected to the auxiliary arm and the tip of the holder is brought into contact with the outer arm, or the auxiliary arm is connected to the inner arm in a superposed manner. The inner arm (thrust resistance arm) is formed by the auxiliary arm in order to construct the connecting joint by providing the inside of the joint body by contacting the tip portion of the outer wall to the bent wall portion formed outside and abutting in a wrapped manner. It is possible to increase the deformation force and the restoring force of the outer bending wall, including the above, and to make it easy to judge the suitability by fully responding to the completion of the connection at the time of pipe connection. The "settling" can be reduced to make the holding function more effective, and a stable connection can be obtained.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing a connection state of a pipe connecting joint according to the present invention with a partial cutout, and FIG. A front view of the holder alone, FIG. 3 is a cross-sectional view taken along line 2A-A in FIG. 4, FIG. 4 is a view corresponding to FIG. 3 of another embodiment, FIG. 5 is a view corresponding to FIG. 3 of yet another embodiment, and FIG. FIG. 6 is a view corresponding to FIG. 3 of still another embodiment,
(1) is a joint body, and a stepped small diameter chamber (3 ') is formed inside the shaft core, and the diameter of the joint body is expanded in line with the through hole (4) of the connecting cylinder wall (2) on the tip side.
And a large-diameter chamber (3) at the rear of the small-diameter chamber, which is formed as a hanging wall (3 ") protruding inward at the rear end of the large-diameter chamber. A seal ring (s) and a bush member (b) are installed inside (3 '), and (7) is a holder, which is connected to the pipe (P) connected to the large diameter chamber (3). An engaging hole (6) is formed in the shaft core of the front engaging wall (5) that engages with the annular bulging wall (P ') provided, and the rearward opening is opposed to the peripheral side of the engaging wall. The tip of the sloping outer arm (6 "), which is formed by the apex of the outwardly formed bent wall (7 '), is connected to the back wall of the bulging wall (P') by the pressure wall (7"'). ) And an inner arm (7 ") (thrust resistance arm) are provided, and the bent wall (7 ') is supported by the retaining wall (3") on the joint body (1) side. At the same time, the pressure wall (7 "') is pressed and engaged with the bulging wall (P') of the pipe (P) to be elastically connected. And the holder
(7) is a pressure-bearing wall (7 "'), and an auxiliary arm (8) is formed by bending outward in a sharp angle, and its tip (9) is connected as shown in Figs. Is provided inside the joint body (1) by contacting the outer arm (6 ″). The tip
When the (9) is folded back as shown in Fig. 4, the outer arm (6 ") is not scratched and the durability is improved. Also, the retainer (7) is provided with the pressing wall (7"'as shown in Figs. 5 and 6). ), The inner arm (7 ") and the auxiliary arm (8) are continuously bent by overlapping the inner arm (7"), and the tip (9) side of the auxiliary arm (8) extends to the bent wall (7 '). It is also possible to abut on the inside of the joint body (1) so as to be provided in a wrapping manner, and at this time, as shown by the chain double-dashed line in FIG. 5, the tip portion (9) is extended in the axial direction, Bending in the axial direction as shown in FIG. 6 can further increase the deformation force and the restoring force.

[0008]

As described above, in the pipe connecting joint according to the present invention, in particular, the tip end portion of the auxiliary arm (8) which is connected to the inner arm (7 ") and bent outwardly is connected. Abutting the outer arm (6 "), or connecting the inner arm (7") with the inner arm and bending the inner arm in a superposed manner to continuously connect the auxiliary arm (8) to the tip. Since the holding tool (7), which is formed by contacting the side with the bent wall (7 ') formed outside and abutting in a wrapped manner, is provided inside, the auxiliary arm
(8) results in increasing the deformation force and the restoring force in the bending wall (7 ') including the inner arm (7 ") (thrust resistance arm), and therefore, the connection completion at the time of connecting the pipe (P) is sufficiently satisfied. It is possible to make the confirmation of its suitability easily, and for a long period of time, the "sagging" at the outer bent wall (7 ') is reduced to make the holding function more effective and stable. It is an extremely useful joint for pipe connection because it can be connected.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a connection state of a pipe connecting joint of the present invention with a partial cutout.

FIG. 2 is a front view of the holder alone of FIG.

FIG. 3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a view corresponding to FIG. 3 of another embodiment.

FIG. 5 is a view corresponding to FIG. 3 of still another embodiment.

FIG. 6 is a view corresponding to FIG. 3 of still another embodiment.

FIG. 7 is a cross-sectional view of a conventional holder.

[Explanation of symbols]

6 ″ outer arm 7 Holder 7'fold wall 7 ″ inner arm 7 "'pressure wall 8 auxiliary arm 9 Tip

Claims (2)

(57) [Claims] 1. A stepped small-diameter chamber and a large-diameter chamber, which are connected to a flow hole of a distal end side connecting cylinder wall, are provided inside the shaft core, and a rear peripheral end portion of the large-diameter chamber is formed. A sealing ring and a bush member are provided in the small diameter chamber portion of the joint main body that forms the retaining wall, and the front engagement wall engages with the annular bulging wall portion of the pipe to be connected in the large diameter chamber. An inner arm having a distal end connected to a folding wall formed by the top of an outer arm facing the peripheral side of the engaging hole and the engaging wall and forming a pressure wall at the axial center of The bent wall portion is supported by the retaining wall portion on the joint body side by means of a tool, and the pressing wall portion at the tip thereof is press-engaged with the bulging wall portion of the pipe to be elastically connected. In the connecting joint, the auxiliary arm is formed by connecting the holder (7) to the pressure wall (7 "') and bending it outward at an acute angle.
A pipe connecting joint, characterized in that (8) are connected in series, and a tip portion (9) thereof is brought into contact with the outer arm (6 "). 2. A stepped small-diameter chamber and a large-diameter chamber, which have an enlarged diameter and are connected to the flow holes of the connecting cylinder wall on the front end side, penetrate through the inside of the shaft core, and the rear peripheral end of the large-diameter chamber is A sealing ring and a bush member are provided in the small diameter chamber portion of the joint main body that forms the retaining wall, and the front engagement wall engages with the annular bulging wall portion of the pipe to be connected in the large diameter chamber. An inner arm having a distal end connected to a folding wall formed by the top of an outer arm facing the peripheral side of the engaging hole and the engaging wall and forming a pressure wall at the axial center of The bent wall portion is supported by the retaining wall portion on the joint body side by means of a tool, and the pressing wall portion at the tip thereof is press-engaged with the bulging wall portion of the pipe to be elastically connected. In this connection joint, the holder (7) is connected to the pressure wall (7 "'), and the auxiliary arm (8) is continuously formed by bending the inner arm (7") inward. Shi A pipe connecting joint, characterized in that the tip end (9) side of the lever extends to the bent wall (7 ') and abuts in a wrapped manner.