JPH08184396A - Connector for connecting thin piping and manufacture thereof - Google Patents

Abstract

PURPOSE: To entirely dispense with a different assembly work for a socket body, to form the whole of a product, containing a connector body, in a compact manner, and to simplify arrangement and connection operation for a piping at a limited space by simplifying molding of a connector body by using a spray forming mold in such a state that a socket body is previously set in a mold. CONSTITUTION: A seal ring member 6 and a bush member 7 are incorporated in the small chamber part of a connector body 1 through which an expanding small chamber 3', connected to a flow hole 4, and a large part 3 are extended in an axis. Further, a socket body 8 having a plurality of internally inclining tongue-form resilient claw wall 5 positioned at the front in an assembly direction of the peripheral part 8" of the central hole of an axis is securely arranged at the rear part of the large chamber, and the expansion wall part 8' of a piping is forcibly locked in a repulsive state for connection by means of a claw wall. The socket body is covered with the peripheral wall of a premolded axis central hole by locking the core member to a core member by the rear end peripheral edge part 8' and coaxially set in a mold for molding a connector body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a metal having a relatively small diameter of about 20 m / m or less for a pipe diameter provided as a supply passage for oil supply and air supply in an automobile or various machines and devices. The present invention relates to a connector for connecting a pipe or a resin tube (hereinafter simply referred to as a pipe) and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a connector of this type, for example, as shown in FIG. 14, a connector body (21) formed in advance has a rear end periphery of an engagement hole (25) formed in a peripheral wall portion thereof. A claw wall (23) inclined inward at the hole edge of the eggplant hanging wall (21 '), at the front part in the direction of assembling to the peripheral wall of the axial center hole.
With the shoulder body (24) of the claw wall portion engaged with the socket body (22) having the above, the annular peripheral wall (23 ') on the rear end side is inserted and internally mounted, and the pipe ( P 0 annular swelling wall (P ₀₎ of _') unit was configured to occupy assay lock the.

[0003]

However, in such a conventional technique, the preformed connector body (21) and the shoulder portion (24) of the socket body (22) are formed by the shoulder portion at the time of engagement. When assembling the annular wall part, it will be crushed inward to allow it to pass through the inside of the hanging wall (21 '), so that the forming work of the connector body (21) and the assembling work of the socket body (22) are troublesome. This will result in a significant decrease in productivity, and the socket body (2
Since the shape of 2) is generally large, the connector body (21)
However, there is a problem in that the entire product including the above has a large diameter, which hinders the arrangement and use in a narrow place.

The present invention has been made in view of the above problems of the prior art. In addition to simple molding of the connector body, no separate assembly work of the socket body is required, and the socket body has a small diameter. (EN) A connector for small-diameter pipe connection, which can make the entire product including the connector body compact by the shape of the connector, and can easily perform the arrangement and connection operation of the pipe in a narrow place and the manufacturing method thereof. That is the purpose.

[0005]

In order to achieve the above-mentioned object, the present invention has a stepped small diameter chamber having an expanded diameter inside the shaft core and connected to the flow hole of the connecting cylinder wall at the tip side, and a stepped large diameter at the rear part thereof. A seal ring member and a bush member are installed inside the small diameter chamber part of the connector body that penetrates the diameter chamber, and a bushing member is installed behind the seal ring member. Socket body made of metal elastic material or resin material, which has a plurality of tongue-shaped elastic claw walls that are located in the inner part and is slanted inward, is fixed and installed inside, and when the pipe is connected, it is incorporated inside by the tip of the elastic claw wall. Connector for connecting a small diameter pipe, which is configured to elastically press and connect the outward annular bulging wall portion provided near the connecting end portion of the pipe, and a preformed center hole It is located on the front of the peripheral wall of the A socket body made of a metal elastic material or a resin material having a plurality of tongue-shaped elastic claw walls that are biased by the above is hooked at a predetermined position of the core member with its rear end peripheral edge, and is attached. A method for manufacturing a connector for a small diameter pipe, which is coaxially set in a mold, and then, with the set state, the socket body is internally mounted and fixed along with molding of a connector body by injection molding of a resin material, and A socket body made of a metal elastic material or a resin material, in which a plurality of tongue-shaped elastic claw walls are provided in the peripheral wall portion of the preformed shaft center hole in the front in the assembling direction, and the rear end peripheral edge is provided at a predetermined position of the core member. It is hooked onto and attached to the elastic claw wall portion, and is coaxially set inside the mold for molding the connector main body having the protruding wall on the inner peripheral surface facing and abutting against the elastic claw wall portion. In a closed state, the socket body is installed and fixed along with the molding of the connector body by injection molding of a resin material, and from the outside through the guide hole portion in the peripheral wall portion penetrated by the projecting wall after the core member is removed. The gist is any of the methods for manufacturing a connector for small diameter pipe connection in which the claw wall portion is inclined inwardly by pressing, and the middle wall formed by the peripheral wall excluding the elastic claw wall portion of the socket body. Alternatively, the tip edge portion may be formed with a locking portion that is fixed to the opposite side of the connector body by molding, or the peripheral wall of the socket body excluding the elastic claw wall portion may have a C-shaped cross section and the rear wall of the peripheral wall may be formed. A plurality of outward pressing pieces are formed to project near the peripheral portion.

[0006]

Since the present invention is constructed as described above,
In addition to the simple molding of the connector body, the socket body is formed by injection molding of the connector body with the socket body already set inside, and the socket body is fixed to the inner peripheral surface of the rear portion of the connector body. No separate assembly work is required at the same time, and at the same time the socket body has a small diameter to make the entire product including the connector body compact, thus hindering the piping arrangement and connection operation in a narrow location. It can be carried out easily and easily.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a partially cutaway vertical sectional view showing a connection state of a connector for connecting a small diameter pipe constructed by a manufacturing method of the present invention. 2 is an enlarged view of the single socket body of FIG.
(a) is a front view, (b) is a sectional view taken along the line AA of (a), FIGS. 3 to 8 are views corresponding to FIG. 2 (b), respectively, of another embodiment of the present invention, and FIG. FIG. 10 is an explanatory view with a partially cutaway vertical section showing a set state of a connector body during injection molding according to the manufacturing method of the present invention, and FIG. 10 is an enlarged view of a socket body alone of another embodiment. A front view, (b) is a cross-sectional view taken along the line BB of (a), and FIG. 11 is an explanatory view by a partially cut-away vertical section showing a set state at the time of injection molding of a connector body according to the manufacturing method, FIG. 12 is a diagram showing another embodiment of the present invention.
11 is a view corresponding to FIG. 11, (b) is an explanatory sectional view showing pressing of the claw wall after injection molding, FIG. 13 is a partially enlarged sectional view showing still another embodiment, and (1) is a connector body. , Resin tube or rubber hose (not shown) on the tip side inside the shaft core
A small stepped chamber (3 ') having a diameter increased in series with a flow hole (4) having a connecting cylindrical wall (2) and a large stepped chamber (3) at the rear of the stepped large chamber (3). The rear part of the inner surface of the large-diameter chamber is used as a hanging wall (1 '), and an elastic seal ring member (6) such as rubber is attached to the small-diameter chamber (3') as needed for a spacer or vibration absorbing ring. Bushing member (7) for positioning, which is attached via
Is the interior. (8) is a socket body, which is attached to the inner peripheral surface of the hanging wall (1 ') in the large diameter chamber (3) and the peripheral wall (8 ") through which the shaft center hole penetrates. Tongue-like elastic claw walls (5) biased inwardly at the front of the direction
SUP and other spring steel materials, spring tempered stainless steel materials, SK materials, phosphor bronze materials, resin materials, etc., and the annular rear end peripheral edge (8 ') portion is hooked and attached to the interior and fixed. . In such a state, the outward annular bulging wall (P ') provided near the connecting end of the pipe incorporated inside the pipe (P) by the tip of each claw wall (5) under the connection of the pipe (P). ) Is pressed in a resilient manner.

The connector main body (1) is preformed in the manufacturing method according to the embodiment, as shown in FIGS. 9 and 11, with the elastic claw wall (inclined inwardly and biased). As the socket body (8) having 5) is inserted into the central hole of the shaft core by the core member (11), the claw wall is expanded and the rear end peripheral edge (8 ') is formed at a predetermined rear position of the core member. Attach it by hooking it on the stepped part (11 ') provided in. Next, preferably, after applying a release agent to the outer surface of the elastic claw wall (5) whose outer surface is smoothed, it is coaxially set inside the mold (12) for molding the connector body consisting of a pair of split molds. Then, in this set state, the resin material is injected from the injection port (12 ') to mold the connector body (1), and at the same time, the socket body (8) is internally mounted and fixed. Then, the elastic claw wall coated with the release agent by the subsequent removal of the core member (11)
(5) The part returns again due to the inward bias, and tilts. Another embodiment of the method of manufacturing the connector body (1) of the present invention is, as shown in FIG. 12, a plurality of tongue-shaped elastic claw walls (5) formed by punching in advance in the assembly direction of the socket body (8). ) Is formed, and the rear end peripheral edge (8 ′) of the socket body (8) is hooked and attached to the stepped portion (11 ′) provided at a predetermined position of the core member as in the above embodiment, Next, on the inner peripheral surface of the mold (12), a cylindrical projection wall
Molded with a pair of split molds having (12 ") (12) The resin material is injected coaxially inside the connector body.
While molding (1), insert and fix the socket body (8). At this time, it is preferable to apply a release agent to the outer surface of the elastic claw wall (5) in advance as in the above-mentioned embodiment.

Next, after the core member (11) is pulled out, the mold (12)
Inserting the pin (13) from the outside after removing the core member (11) at the guide hole (1 ") part on the connector body (1) side that is penetrated by the cylindrical projection wall (12") It is formed by inclining the claw wall (5) inward by pressing.

If necessary, the connector body may be attached to the middle or tip edge of the peripheral wall (8 ") excluding the elastic claw wall (5).
(1) Holes that are fixed to the mold by molding (Fig. 3), taper notches tapering forward (Fig. 4), or outward locking parts such as flanges or claws (Fig. 5). ) Or
Alternatively, the outer surface of the connector body may be formed as a rough surface such as a pear surface or a circumferential streak so as to be securely fixed during injection molding of the connector body. In this case, by providing the locking part (9), the socket body (8) can withstand the force in the pulling-out direction of the pipe (P) sufficiently, so that the hanging wall (1 ') is unnecessary as shown in FIG. The axial dimension of the connector body (1) can be further reduced.
In the embodiments shown in FIGS. 3 to 5, the integrally formed socket body (8) is shown, but the plate material is pressed, and the separately formed rear end peripheral edge (8 ') and peripheral wall (8 ") are shown. It is also possible to form the socket body (8) by integrating the parts with welding or engaging with each other, and in order to further reduce the axial dimension, the socket body (8) can be connected to the elastic claw wall (5). ) Leaving the surrounding wall (8 ")
Remove the part and attach the connector body (1) to the rear edge (8 ').
Such as holes (Fig. 6) to be fixed in the mold at opposite portions of the mold, tapered notches (Fig. 7) tapering forward or rearward, or outward flanges or claws formed by punching (Fig. 8). A locking part (9) can also be provided.

As yet another embodiment, as shown in FIG. 10, the peripheral wall (8 ") is formed into a C-shaped cross section by a notch, and is then projected outward near the peripheral part. A plurality of pressing pieces (10) are formed, and when the socket body (8) is attached to the core member (11), the pressing pieces make contact with the inner peripheral surface of the mold (12), The socket body may be closely fitted to the core member (11).

[0012]

As described above, in the connector for connecting a small diameter pipe and the method for manufacturing the same according to the present invention, a mold release agent is applied to the outer surface of the elastic claw wall (5) of the previously formed socket body (8). Apply it and hang it on the core member (11) to attach it, and
2) In addition to molding the connector body (1) by injection molding with the set state inside, the socket body (8) is internally mounted and fixed to the inner peripheral surface of the connector body, and then the core member (11) The elastic claw wall (5) part is returned by inward biasing to be returned and tilted, or the claw wall (5) part is tilted inward by inserting and pressing a pin. Therefore, by simply molding the connector body (1) by injection molding, it is possible to completely eliminate the work of separately assembling the socket body (8), and at the same time, the connector body (1) is formed by the shape of the socket body which has a small diameter. The entire product, including the product, is compact, and therefore the piping (P) can be installed and connected easily in a narrow place without any trouble. is there.

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical cross-sectional view of a connector for connecting a small diameter pipe constituted by a manufacturing method of the present invention in a connected state.

FIG. 2 is an enlarged view of the socket body alone in FIG. 1, (a)
Is a front view, and (b) is a sectional view taken along the line AA of (a).

FIG. 3 is a view corresponding to FIG. 2 (b) of the same as another embodiment.

FIG. 4 is a view corresponding to FIG. 2 (b) of the same as another embodiment.

FIG. 5 is a view corresponding to FIG. 2 (b) of the same as another embodiment.

FIG. 6 is a view corresponding to FIG. 2 (b) of the same as another embodiment.

FIG. 7 is a view corresponding to FIG. 2 (b) of the same as another embodiment.

FIG. 8 is a view corresponding to FIG. 2 (b) of the same as another embodiment.

FIG. 9 is an explanatory view with a partly cutaway longitudinal section showing a set state during injection molding of the connector body according to the manufacturing method of the present invention.

FIG. 10 is an enlarged view of a socket alone according to another embodiment, in which (a) is a front view and (b) is a sectional view taken along line BB of (a).

FIG. 11 is an explanatory view by a partly cutaway longitudinal section showing a set state at the time of injection molding of the connector body according to the manufacturing method.

12A and 12B are views showing another embodiment of the manufacturing method, wherein FIG. 12A is a view corresponding to FIG. 11, and FIG. 12B is an explanatory sectional view showing pressing of the claw wall after injection molding.

FIG. 13 is a partially enlarged cross-sectional view showing still another embodiment.

FIG. 14 is a partially cutaway vertical sectional view of a conventional connector for connecting a small diameter pipe in a connected state.

[Explanation of symbols]

 1 Connector Main Body 1'Hanging Wall 2 Connection Tube Wall 3 Large Diameter Chamber 3'Small Diameter Chamber 4 Flow Hole 5 Elastic Claw Wall 6 Seal Ring Member 7 Bushing Member 8 Socket Body 8'Rear Edge 8 ″ Circumferential Wall 9 Locking Part 10 Presser piece 11 Core member 11 ′ Stepped portion 12 Mold 12 ″ Projection wall P Piping P ′ Swelling wall

Claims (5)

[Claims] 1. A stepped small-diameter chamber (3 '), which has an enlarged diameter and is connected to a flow hole (4) of a connecting cylinder wall (2) on the tip side inside the shaft core, and a stepped large-diameter chamber (3) in the rear part. ) And a seal ring member (6) in the small diameter chamber (3 ') of the connector body (1), and a bush member (7) behind it, and a rear portion of the large diameter chamber (3). In addition, a socket made of a metal elastic material or a resin material that has a plurality of tongue-shaped elastic claw walls (5) that are located in the front part in the assembly direction on the peripheral wall (8 ") of the shaft center hole and incline inward. The body (8) is fixed to the interior, and the elastic claw wall is attached when the pipe (P) is connected.
(5) A structure in which the outward annular bulging wall (P ') provided near the connecting end of the pipe incorporated inside by the tip of (5) is elastically pressed to connect A connector for small diameter piping that is characterized by. 2. A locking member, which is molded and fixed to a facing portion of the connector body (1) at the middle or tip edge of the peripheral wall (8 ") of the socket body (8) excluding the elastic claw wall (5). The small-diameter pipe connection connector according to claim 1, wherein the connector is formed by providing a portion (9). 3. The peripheral wall (8 ") of the socket body (8) excluding the elastic claw wall (5) has a C-shaped cross section, and a plurality of outward pressing pieces near the rear peripheral part of the peripheral wall. The connector for connecting small diameter pipes according to claim 1, wherein the connector (10) is formed by projecting. 4. A metal elastic material having a plurality of tongue-shaped elastic claw walls which are located in front of the preliminarily formed shaft center hole and are biased inwardly at a front portion in the assembling direction. Alternatively, a socket body made of a resin material is hooked at a predetermined position of the core member with its rear end periphery and attached, and is set coaxially inside the mold for molding the connector body. A method for producing a connector for connecting small diameter pipes, characterized in that the socket body is internally formed and fixed along with the molding of the connector body by injection molding. 5. A socket body made of a metal elastic material or a resin material, in which a plurality of tongue-shaped elastic claw walls are provided on the peripheral wall portion of the preformed shaft center hole in the front in the assembling direction, with a rear end peripheral edge. Coaxially inside the mold for molding the connector main body, which is hooked at a predetermined position of the core member and adheres to the elastic claw wall portion and has a protruding wall on the inner peripheral surface that is in contact with the elastic claw wall portion facing the claw wall portion. The interior of the socket body along with the molding of the connector body by injection molding of a resin material with the set state, and then the inner wall of the socket body is fixed, and at the peripheral wall portion penetrated by the protruding wall after the core member is removed. A method for manufacturing a connector for a small diameter pipe, wherein the claw wall portion is configured to be inclined inward by being pressed from the outside through the guide hole portion.