JPH0744879Y2 - Connector for small diameter piping - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is generally used in automobiles or various machines, devices, etc., for pipe diameters and thicknesses of about 20 m / m or less that are provided as oil and air supply passages. The present invention relates to the improvement of the structure of a connector for connecting a metal tube or a resin tube (hereinafter simply referred to as piping) having a relatively small diameter.

[Prior Art] Conventionally, as a connection connector of this type, as shown in, for example, FIG. 5, the cylindrical wall is connected to the through hole (24) of the connecting cylindrical wall (22) at the tip inside the shaft core. A stepped diameter-increasing chamber (23) having a rear peripheral end portion as a hanging wall (23 ') is penetrated, and a seal ring member (26) is internally provided in the diameter-increasing chamber portion, and the seal ring The front end portion of the main body (21) having the bush member (27) engaged with the stepped portion of the diameter-expanding chamber (23) for holding the member is opposed to the opposite end portion on the front end side. The stepped portion of the rear end annular wall (28 ') of the socket body (28) having the slanting claw wall (25, 25') is mounted, and the claw wall portion is attached to the expanding chamber on the main body (21) side. Expansion chamber (23) provided near the connecting end of the pipe (P _O ), assembled by being engaged with the engaging hole (29, 29 ') formed of a long hole formed in the cylindrical wall of (23) Expansion to the outside assembled inside In the connected state, the projecting wall portion is configured to elastically engage with the claw wall (25, 25 ').

[Problems to be Solved by the Invention] However, in such a conventional technique, the socket body (28) has the rear end annular wall (28 ') portion and the hanging wall (23') portion on the main body (21) side. Since the claw wall (25, 25 ') on the side of the socket is engaged with the engaging hole (29, 29') of the expanding chamber (23) of the main body at the same time, the socket body is assembled. When the (28) is mounted, the diameter of the claw wall (25, 25 ') is reduced while the peripheral wall of the root portion (28 ") of the claw wall passes through the inside of the hanging wall (23'). It will be forced to attach from the back of the (23) part,
Therefore, it is necessary to make the entire product including the main body (21) to have a large diameter, and further, the product in the axial center direction by being mounted in the expanding chamber (23) and the hanging wall (23 ') part connected to the cylindrical wall. The length is too long, and there is a problem that when used at a narrow place at the time of installation, it causes interference with other parts and often causes problems. Also, since the claw walls (25, 25 ') on the socket body (28) side become long in relation to the large diameter, the elastic engagement pressure at the bulging wall portion of the pipe (P _O ) There were also problems such as weakening and causing "sagging", disconnection of the pipe (P _O ) being installed, and deterioration of the engaging pressure in the loosening direction, making the connection unstable for a long period of time.

The present invention has been made in view of the above problems of the prior art, and makes the entire product compact in the radial direction and the length direction, and eliminates problems such as interference at a strict place during installation. The structure of the short claw wall increases the elastic engagement pressure on the bulging wall of the pipe, at the same time eliminates the concern of "sagging", and improves the proof strength in the direction of pipe loosening and loosening. It is an object of the present invention to provide a connector for small-diameter pipe connection, which can maintain a reliable connection for a long period of time and facilitate the attachment of the socket body itself.

[Means for Solving the Problem] In order to achieve the above-mentioned object, the present invention has a stepped diameter-increasing chamber which is connected to a communication hole of a connecting cylinder wall on the tip side and which is formed inside the shaft core. The rear end peripheral edge portion is formed as a flange wall projecting outward, and a seal ring member is further installed in the diameter expanding chamber portion, and the flange wall portion of the main body formed by inserting a bush member at the rear portion thereof, When the projecting wall portion of the socket body, which has its tip end portion facing inward and displaced in the circumferential direction and having a substantially U-shaped claw wall as a whole, is brought into contact with each other, Bending the outer end of the overlapping portion formed by the fixing member made of a separate body inwardly and fixing it by caulking to the collar wall,
In the connected state of the pipe, the tip of the claw wall of the socket body elastically pushes the outward annular bulging wall portion provided in the vicinity of the connection end portion on the pipe side incorporated in the inside of the diameter expansion chamber. The gist of the present invention is to connect the members by pressurizing them in a ring-like manner, wherein the projecting wall is integrally formed in an annular shape, or a plurality of square-shaped socket bodies are arranged on the flange wall. It is provided and fixed by a fixing member, and the fixing member is formed in a single ring or in a plurality of U-shaped cross sections.

[Operation] Since the present invention is configured in this way, the socket body is easily attached by the fixing structure of the flange wall portion at the rear end periphery of the main body, which is formed separately from the socket body. At the same time, the socket body has a relatively small diameter or a small diameter in the radial direction due to the shape of the claw wall, which has a substantially U-shape as a whole and whose distal end portion is formed inward and displaced in the circumferential direction. In the prior art, the structure of the main body side that shortens the product length by eliminating the need for an engagement hole consisting of an elongated hole formed in the cylindrical wall portion of the expanding chamber to which the claw wall portion is engaged The whole can be made compact, and the short claw wall exerts a strong engaging pressure on the bulging wall portion of the pipe, and the fear of "sagging" can be eliminated,
By improving the proof strength in the direction of pipe disconnection and loosening, a reliable connection can be maintained for a long period of time.

[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a connector for a small diameter pipe according to the present invention with a partial cutout in a connected state, and FIG. 1 is a view equivalent to FIG. 1 of the other embodiment, FIG. 3 is a side view of the socket body alone of FIG. 1, and FIG. 4A is a perspective view of another embodiment of the socket body alone of FIG. FIG. 4B is an explanatory view when the annular bulging wall is passed when the embodiment of FIG. 4A is used, and (1) is a main body, inside the shaft core, a resin tube or a rubber hose on the tip side ( A stepped diameter-expanding chamber (3) is provided so as to extend through a flow-through hole (4) having a connecting cylindrical wall (2) (not shown) and the rear end peripheral portion of the diameter-expanding chamber is outwardly directed. It is formed by forming a protruding collar wall (3 '). A plurality of seal ring members (6) made of an elastic material such as rubber are provided in the diameter expansion chamber (3) through a spacer as desired, and the seal ring members are positioned at the rear part to hold the seal ring members. (7) Bushing member (7) having an annular shape or a short cylindrical shape with a collar that engages with the step portion
Is attached.

(8) is a socket body (FIGS. 1 and 3) made of a metal spring material or a resin material, in which a through hole (10) is provided at the center of the shaft, and the front end of the through hole (10) faces inward. In addition, a plurality of claw walls (5), which are formed to be deviated in the circumferential direction and which are substantially U-shaped as a whole, are integrally projected, and an annular projecting wall (5 ') which is erected outward at the outer peripheral end. ) Is included. Then, in the state where the protruding wall (5 ') is in contact with the flange wall (3') of the main body (1), the abutment claws of the fixing member (9) whose separate contact-overlapped portions are separate bodies. The wall (9 ') is applied and fixed, preferably in the form of a crimp, to be fixed. Incidentally, the fixing member (9) may be formed in a band-like shape so as to be swaged over the abutting overlapped portion after being attached to the abutting overlapped portion. After arranging a plurality of pieces, they may be caulked and fixed. Further, the socket body (8) not only has a plurality of claw walls (5) projecting from the annular projecting wall (5 ') and is integrally formed, but also has a substantially rectangular piece-like projecting wall (5'). Formed by U-shaped claw wall (5),
A plurality of such socket bodies (8) may be arranged on the collar wall (3 '). As described above, since the claw wall (5) is formed so that its tip end faces inward and is deviated to the circumference and has a substantially U-shape as a whole, the inner peripheral surface of the diameter expansion chamber (3). Since the gap between the apex of the annular protruding wall (P ') and the apex of the annular protruding wall (P') can be set to be slightly larger than the wall thickness of the claw wall (5), the radial dimension of the main body (1) can be minimized. In this state, when the outward annular bulging wall (P ') portion provided near the connecting end of the pipe (P) is incorporated into the diameter expansion chamber (3), the annular bulging wall (P) is formed. ′), The claw wall (5) is shown in FIGS. 3 and 4A.
As shown in FIG. 4B and after being pressed in the radial direction as shown in FIG. 4B, the ring-shaped bulging wall returns to its original position, and the tip end of this claw wall (5) elastically presses and connects. It is a thing.

The socket body (8) shown in FIGS. 2 and 4A is formed such that the tip portion of the claw wall (5) is slightly displaced from the root portion as described above. Therefore, even if the annular bulging wall (P ') is pressed in the radial direction, the thickness of the bulging wall is only the thickness of the bulging wall (P').

[Effects of the Invention] As described above, the connector for connecting a small-diameter pipe according to the present invention has a claw wall that is generally U-shaped as a whole and that is formed with its tip end facing inward and displaced in the circumferential direction. The above-mentioned fixing which is a separate body with the projecting wall (5 ') standing upright on the outside of the socket body (8) having the projecting (5) in contact with the collar wall (3') on the main body (1) side. Since the structure is fixed by the member (9), the socket body (8) can be easily attached, and at the same time, a small diameter or a small diameter in the radial direction due to the shape of the claw wall having a substantially U-shaped cross section, and the shaft core. The entire product can be made compact due to the structure of the main body (1) whose product length in the direction is short. Therefore, the problem of interference at a strict place at the time of installation can be eliminated, and the claw wall can be made shorter. Demonstrate a strong engagement pressure to the bulging wall (P ') of the pipe (P) due to the structure of In addition, there is no fear that "sagging" will occur, and at the same time, the structure of the socket body (8) that is a separate body can improve the proof strength in the direction in which the pipe (P) is pulled out and loosened for a long time. It is an extremely useful connector for connecting small diameter pipes, which can maintain the connection more reliably.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention by a partial cutout in a connected state of a connector for connecting a small diameter pipe, and FIG. 2 is a view corresponding to FIG. The figure is a side view of the socket body alone of FIG. 1, FIG. 4A is a perspective view of another embodiment of the socket body alone of FIG. 2, and FIG. 4B is the case of using the embodiment of FIG. 4A. FIG. 5 is an explanatory view of when the annular bulging wall passes, and FIG. 5 is a vertical cross-sectional view showing a connection state of a connection connector according to a conventional example by partially cutting away. (1) ... main body, (2) ... connecting cylinder wall, (3) ... diameter expanding chamber,
(3 ') ... collar wall, (4) ... flow hole, (5) ... nail wall,
(5 ') ... protruding wall, (6) ... seal ring member, (7)
... Bush member, (8) ... Socket body, (9) ... Fixing member, (9 ') ... Engaging claw wall, (10) ... Through hole, (P) ... Piping, (P') ... Swelling wall

Claims (4)

[Scope of utility model registration request] 1. A stepped diameter-expanding chamber (3) continuous with a flow hole (4) of a connecting cylinder wall (2) on the tip side is provided in the shaft core, and a rear end peripheral portion of the diameter-expanding chamber is formed. A main body which is not formed with a flange wall (3 ') projecting outward, a seal ring member (6) is further provided inside the diameter expansion chamber (3), and a bush member (7) is inserted in the rear part thereof. A socket body (5) having a substantially U-shaped claw wall (5) formed in the collar wall (3 ') of (1) with its tip end facing inward and displaced in the circumferential direction. 8)
With the protruding wall (5 ') standing upright outside the
When the overlapping end portions of the fixing members (9) made of separate bodies are bent inward and fixed by caulking the flange wall (3 '), the pipe (P) is connected. With the tip of the claw wall (5) in the socket body (8),
The outward annular bulging wall (P ') provided near the pipe-side connection end incorporated in the diameter-expanding chamber (3) is elastically pressed and connected. A connector for small diameter piping that is characterized by 2. The connector for connecting a small diameter pipe according to claim 1, wherein the projecting wall (5 ') is integrally formed in an annular shape. 3. The projecting wall (5 ') is formed by arranging a plurality of socket bodies (8) each having a rectangular piece shape on the flange wall (3') and fixed by a fixing member (9). The connector for connecting small diameter pipes according to claim 1. 4. The connector for connecting small diameter pipes according to claim 1, wherein said fixing member (9) is formed in a single ring or in a plurality of U-shaped cross sections.