JPH09159083A - Small diameter pipe connecting connector and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of a scratch on an expanded wall on a pipe side by engagingly pressing a ring type outward expanded wall part in the vicinity of a connection end part of a pipe combined in the inside elastically by means of a tip part of an elastic jaw wall when pipes are connected together. SOLUTION: In a stepped part on the inner circumferential face of a hanging support wall part 1-1 in a large diameter chamber 3, a spring steel member provided with a plurality of tongue type elastic jaw walls 5-1, which are inclined inward from a narrow width circumference wall part 5-3 of a shaft core center hole toward the front part in the combining direction, is arranged. The spring steel member is arranged inside when its rear end circumference edge 5-2 part is hung and fixed. At least in the tip part, of the elastic jaw wall 5-1, a mold part molded by a resin material is formed, and the rear end circumference edge 5-2 is fitted in the stepped part on the inner circumferential face of the hanging support, wall part 1-1. In this way, a ring type outward expanded wall P' in the vicinity of a connection end part of a pipe P combined in the inside is elastically engaged and pressed by means of the mold part 8.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, as a connection connector of this type, for example, as shown in FIG. 12, a connector body (21) formed in advance has an engaging hole (2
5) In the hole edge portion of the hanging wall (21 ') formed by the rear end periphery,
A socket body (22) having a claw wall (23) inclining inward at the front part in the assembling direction is attached to the peripheral wall part of the central hole of the shaft with the shoulder part (24) of the claw wall part engaged, and then annular wall (23 ') of the end side was configured to occupy assay engaging a (portion caused to interior by inserting the section, annular swelling wall P ₀₎ of the pipe incorporated therein (P _0)'.

[0003]

However, in such a conventional technique, the shoulder portions (2) of the connector body (21) and the socket body (22) which have been molded in advance are formed.
4) When the annular wall portion formed by the shoulder portion is assembled during the engagement of 4), it is crushed inward so that it passes through the interior of the suspension wall (21 '). Therefore, the connector body is formed and the socket body (22) is formed. The work of assembling the socket is inconvenient, resulting in a marked decrease in productivity, and the socket body (22) has a generally large diameter.
Naturally, the entire product including the connector body (21) had a large diameter, which hindered the arrangement and use. Further, since the socket body (22) is usually formed of a metal elastic material or a resin material, in the former case, the elastic body at the tip portion of the claw wall (23) may be subjected to vibration under the arranged state. Depending on the pressure
The bulging wall (P ₀ ′) on the pipe (P ₀ ) side is likely to be scratched and cause a safety problem. On the other hand, in the latter case, the claw wall (23) part at the time of pressure application is likely to occur. The elastic force was generally poor, and there was a problem that the connection became unstable due to fatigue over a long period of service.

The present invention has been made in view of the above problems of the prior art. In addition to the simple molding of the connector body, the work of separately assembling the socket body is not necessary, and at the same time, the socket body has a small diameter. Depending on the shape, the entire product including the connector body is made compact, and the piping arrangement and connection operation in a narrow place can be performed easily and without difficulty, and furthermore, the resin material is molded on at least the tip of the nail wall. Therefore, even under vibrating conditions, there is a fear that abrasion will occur on the bulging wall on the piping side formed by the pressure-engagement part for a long period of time with a resilient and stable elasticity made of a metal elastic material. It is an object of the present invention to provide a connector for connecting a small diameter pipe and a method for manufacturing the same, which can be eliminated and can be surely connected and can be secured in safety.

[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 behind the seal ring member are provided in the small diameter chamber portion of the connector main body, which penetrates the diameter chamber and has a hooking hole formed in a peripheral wall portion formed by the large diameter chamber. The radial chamber portion has a plurality of tongue-shaped elastic claw walls which are located in the front part in the assembly direction on the peripheral wall part of the axial center hole and are inclined inward, and at least the tip part of the claw wall. A socket body made of a metal elastic material having a molded part formed by molding a resin is fixed and installed inside, and when the pipe is connected, the vicinity of the connection end of the pipe incorporated by the tip of the elastic claw wall Of the ring-shaped bulging wall to the outside of the The connector pipe connected to the gist,
Further, the socket body is fixed by hooking a rear end peripheral edge portion of its peripheral wall portion to a step portion of an inner peripheral surface of a hanging wall at a rear portion of a hooking hole formed in the large diameter chamber, or An engaging portion provided on the middle or tip edge portion excluding the elastic claw wall is molded and fixed to a facing portion of the connector body, and the peripheral wall portion formed by the socket body excluding the elastic claw wall has a C-shaped cross section. It is characterized in that it is integrally formed with an outwardly projecting wall on the outside of the molded portion formed by the socket body.

Further, according to the present invention, there is provided a plurality of elastic claw walls each having a tongue shape which is located in front of the peripheral wall portion of the preformed shaft center hole in the assembling direction and is biased inwardly inclined. A socket body made of a metal elastic material is attached to the core member by hooking its rear end peripheral portion at a predetermined position of a core member, and is coaxially set inside a mold for molding a connector body. With the molding of the main body and the molding of at least the tip portion of the claw wall, a method for manufacturing a connector for small-diameter pipe connection, in which the socket body is fixed to the inner peripheral surface of the connector main body and internally mounted, and , A metal having a plurality of tongue-shaped elastic claw walls which are located in front of the peripheral wall portion of the preformed center hole of the axial center in the assembling direction so as to project in front of the peripheral wall or open. Replace the socket body made of elastic material with Hook the peripheral edge of the rear end at a predetermined position on the core member to cover it, and with the state of being coaxially set inside the mold for molding the connector body, mold the connector body by injection molding of resin material and the claw wall. The socket body is fixed to the inner peripheral surface side of the connector main body at the time of molding at least the tip end of the connector, and then the claw wall is tilted inward by pressing from the outside through the engagement hole on the connector main body side. The gist of the invention is a method of manufacturing a connector for connecting a small-diameter pipe, which is configured as described above.

Since the present invention is constructed as described above, the connector body is molded with the socket body made of a preformed metal elastic material set at a predetermined position of the core member, and the socket body is formed. Since the socket body is fixed inside the connector body and internally mounted along with the molding at the tip of the elastic claw wall, it is not necessary to separately assemble the socket body in addition to the simple molding of the connector body. At the same time, the socket body has a small diameter to make the entire product including the connector body compact, and the piping arrangement and connection operation at a narrow location can be performed easily and easily. Due to the molded part made of resin material at the tip of the wall, even if it is vibrated, it does not become a pressure part for a long period of time with strong elastic elasticity and stable elasticity. Rubbing in the bulging wall of the pipe-side can be eliminated anxiety resulting scar, and can be obtained over a secure connection to the long-term.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, referring to the drawings, an embodiment of the present invention will be described. FIG. 1 is a partial cutaway of a connector for connecting a small diameter pipe constructed by the manufacturing method of the present invention in a connected state. 2 is a longitudinal sectional view, FIG. 2 is a view showing the socket body alone in FIG. 1, (a) is an enlarged front view, and (b) is A- of (a).
FIG. 3 is a sectional view taken along line A, FIG. 3 is a view showing a socket unit of another embodiment, (a) is an enlarged front view, (b) is a sectional view taken along line BB of (a), and FIG. FIG. 5 is an explanatory view with a partially cut-away vertical section showing the state of injection molding of the connector body according to the manufacturing method of the present invention and the setting state at the time of molding the tip end portion of the claw wall of the socket body. 6 is a cross-sectional view of a line, FIG. 6 is an explanatory view by a partially cut-away vertical cross section when pressing a claw wall portion in a state of being set to another core member according to another manufacturing method, and FIG. 7 of another embodiment. FIG. 8 is a partially cutaway vertical sectional view of the connector for connecting a small diameter pipe in a connected state. FIG. 8 shows injection molding of a connector body according to a manufacturing method of another embodiment of the present invention, Explanatory drawing with a partially cutaway longitudinal section showing a set state at the time of molding, and FIG. 9 is a sock used in the embodiment of FIG. 10 is a sectional view of a single socket, FIG. 10 is a sectional view showing another embodiment of a socket alone, and FIG. 11 is a sectional view showing yet another embodiment of a socket alone. A stepped small-diameter chamber (3- that expands the diameter in a continuous manner with a communication hole (4) having a connecting tube wall (2) such as a resin tube or a rubber hose (not shown) on the tip side inside the core.
1) and a stepped large-diameter chamber (3) are provided in the rear part thereof, and engaging holes (1-3) are formed in the peripheral wall (1-2) of the large-diameter chamber to support the rear part. It is to be the wall (1-1).

An elastic seal ring member (6) made of rubber or the like is attached to the small-diameter chamber (3-1) through a spacer as desired, and a positioning bush member (7) is provided behind the elastic seal ring member (6). It is a thing.

Further, (5) is a socket body made of a metal elastic material, and as shown in FIG. 1 (a), in the large diameter chamber (3), the inner peripheral surface of the hanging wall (1-1) is formed. The stepped portion has a plurality of tongue-shaped elastic claw walls which are biased inwardly from the narrow peripheral wall portion (5-3) of the shaft center hole toward the front portion in the assembling direction ( 5-1) spring steel material such as SUP, spring tempered stainless steel material, SK material, phosphor bronze, etc., and the rear end peripheral edge (5-2) portion is hooked and fixed, or the interior is formed, or as shown in FIG. As shown in b), the peripheral wall portion (5-3) is formed to have a wide width, and a part of the peripheral wall portion (5-3) of the shaft center hole is cut to form the portion at the front in the assembling direction. A tongue-shaped elastic claw wall (5-1) biased inwardly toward the inside is formed, and further, a locking portion (5) facing outward is formed at the front end portion of the peripheral wall portion (5-3). ) Is provided, it may be molded fixed to the inner peripheral surface of the connector body (1) a locking portion. Then, at least the tip of the elastic claw wall (5-1) is formed as a molded portion (8) formed of a resin material.

As described above, the rear end peripheral edge (5-2) of the narrow peripheral wall portion (5-3) is hooked on the step portion of the inner peripheral surface of the hanging wall (1-1) portion, or is wide. Molded portion provided at the tip of the claw wall when the pipe (P) is connected in a fixed state in which the locking portion (5a) at the front end of the peripheral wall portion (5-3) is fixed to the connector body (1) by molding. By (8), the outward annular bulging wall (P ') near the connection end of the pipe (P) assembled inside is elastically pressed.

In the method of manufacturing the connector body (1) according to the embodiment shown in FIG. 1 (a), as shown in FIG. 4 to FIG. The socket body (5) having the elastic claw wall (5-1) shown in FIG. 2 is pushed and expanded as the core member (9) is inserted into the axial center hole, and the rear end peripheral edge (5-2 ) Is hooked onto a stepped portion (9-1) provided at a predetermined position behind the core member to be adhered thereto, and then the core member (9) is pulled out so that the elastic claw wall (5-1) is inward again. It will return and incline due to the urging force. In another embodiment, the elastic claw wall (5-
1) is projected to the front of the peripheral wall of the shaft center hole or the elastic claw wall (5-1) is opened (FIG. 3) and hooked at a predetermined position of the core member (9) to be attached. Then, it is coaxially set inside the mold (10) for molding the connector body composed of a pair of split molds, and in this state, the resin material is injected from the injection ports (10-1) and (10-2). The connector main body (1) and the elastic body claw wall (5-1) on the side of the socket body (5) is molded with a mold part (8) at least at the tip end thereof. The part (-2) is hooked on the stepped part of the inner peripheral surface of the hanging wall (1-1) on the connector body (1) side so as to be internally mounted and fixed. Next, in relation to the protrusion or opening of the elastic claw wall (5-1) shown in FIG. 6 (a), after the interior of the socket body (5) by injection molding and fixing, another core member (9) is provided.
-1), the punch tool (1) is passed through the engaging hole (1-3) of the peripheral wall (1-2) of the connector body (1).
It is formed by inclining inward as shown in FIG. 6B by pressing from the outside by 1).

Similarly, in the case of the socket body (5) as shown in FIGS. 4 to 9, as the socket body (5) is inserted into the shaft center hole by the core member (9), the claw wall is pushed. The elastic claw is spread and hooked at the rear end peripheral edge (5-2) to the step portion (9-1) provided at a predetermined position behind the core member to be attached, and then the core member (9) is removed. Wall (5-1)
Is inclined by returning to the inner side again by urging inward. Also, if desired, the peripheral wall portion formed by the socket body (5) is formed into a C-shaped cross section (FIG. 3) by a notch, and the core member ( 9)
Alternatively, and / or setting to (9-1) may be facilitated, and as shown in FIG. 7 (a), an outward pin may be formed on the outside of the mold portion (8) of the elastic claw wall (5-1). 7 (b) is provided integrally with the knob-shaped knob (8-1) to facilitate the release at the bulging wall (P '), and the assembled state can be externalized by the relative angle to the axis. It may be a confirmation member that makes a more detailed judgment. Furthermore, the peripheral wall portion (5) of the socket body (5) is
-1) is formed into a desired shape including the connector body (1) in connection with the arrangement and connection operation in a narrow place such as a circular shape as shown in FIG. 2 or a square shape as shown in FIG. Of course, it is also good.

On the other hand, in the method for manufacturing the connector body (1) according to the embodiment shown in FIG. 1 (b), the elastic claw wall (5-) which is preformed and biased inwardly (FIG. 9).
As shown in FIG. 8, the socket body (5) having 1) is expanded by pushing the claw wall as the core member (9) is inserted into the axial center hole, and the rear end peripheral edge (5-2) of the core member is formed. The elastic claw wall (5-1) is hooked on a stepped portion (9-1) provided at a predetermined position on the rear side to be attached, and then the core member (9) is removed.
Is again inclining by the inward bias. Next, it is set coaxially inside the mold (10) for molding the connector body consisting of a pair of split molds, and in this state, the resin material is injected from the injection ports (10-1) and (10-2) to make the connector. The main body (1) is molded, and at the same time, at least the tip of the elastic claw wall (5-1) on the socket body (5) side is molded with a mold portion (8), and the wide peripheral wall portion (5-) of the socket body (5-) is molded. 3) The locking portion (5a) at the front end portion of the connector body (1) connector body (1)
Fix it to the inner surface of the mold. Then, FIG.
As in (a) and (b), the elastic claw wall (5-1) is formed by inclining inward.

In the embodiment of FIGS. 1 (a) and 1 (b), if the peripheral wall portion (5-3) is provided with a plurality of holes (12) and notches (13) as shown in FIGS. 10 and 11, The socket body (5) is fixed more firmly to the connector body (1).

[0016]

As described above, in the connector for connecting a small diameter pipe and the method for manufacturing the same according to the present invention, the socket body (5) made of a preformed metal elastic material is retained at a predetermined position of the core member (9). And put it on, mold (10)
After the interior of the socket body is fixed by injection molding with the internal set state and the molding of the connector body (1) by molding and the molding of the nail wall (5-1), Injection molding, since the elastic claw wall (5-1) part having the molded part (8) formed by pressing after the release of the core member (9) is inwardly inclined. In addition to the simple molding of the connector body (1) by the above, it is not necessary to separately assemble the socket body (5), and at the same time, the entire product including the connector body (1) is formed by the shape of the socket body having a small diameter. Is compact, and therefore, the arrangement and connection of the pipe (P) in a narrow place can be performed easily and without any trouble, and the mold part (8) in the elastic claw wall (5-1) part is also provided. By vibrating Also, there is no fear of scratches on the bulging wall (P ') on the pipe (P) side formed by the pressure-engagement portion for a long period of time under the toughness and stable elasticity of the metal elastic material. You can get secure connection and security, etc.
It is an extremely useful connector for connecting small diameter pipes and a method for manufacturing the same.

[Brief description of the drawings]

FIG. 1 is a partially cutaway vertical cross-sectional view of a connector for connecting a small diameter pipe configured by a manufacturing method of the present invention in a connected state, in which (a) is a diagram showing a first embodiment and (b) is a diagram. FIG. 7 is a diagram showing a second embodiment.

FIG. 2 is a view showing the single socket of FIG. 1, and FIG.
Is a front view by enlarging, and (b) is a cross-sectional view taken along line AA of (a).

3A and 3B are views showing a single socket body of another embodiment, in which FIG. 3A is an enlarged front view, and FIG.
It is sectional drawing of the B line.

FIG. 4 is a partially cutaway vertical cross-sectional view showing a state of injection molding of the connector body according to the manufacturing method of one embodiment of the present invention and a set state at the time of molding on the tip end portion of the claw wall of the socket body. .

5 is a cross-sectional view taken along the line CC of FIG.

FIG. 6 is an explanatory view with a partially cut-away vertical section in a state of being set on another core member according to another manufacturing method,
(A) is a figure which shows before pressing a claw wall part, (b) is a figure which shows the time of pressing a claw wall part.

FIG. 7 is a partially cutaway vertical sectional view of a connector for connecting a small diameter pipe of another embodiment, in which (a) shows a connected state;
(B) is a figure which shows the state which releases a connection.

FIG. 8 is a partially cutaway vertical cross-sectional view showing a state of injection molding of a connector body according to another embodiment of the present invention and a set state at the time of molding on a tip end portion of a claw wall of a socket body. is there.

9 is a sectional view of a single socket used in the embodiment of FIG.

FIG. 10 is a cross-sectional view showing another embodiment of the socket alone.

FIG. 11 is a sectional view showing still another embodiment of the socket alone.

FIG. 12 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 1-1 Hanging Wall 1-2 Circumferential Wall 1-3 Hanging Hole 2 Connection Tube Wall 3 Large Diameter Chamber 3-1 Small Diameter Chamber 4 Flow Hole 5 Socket Body 5-1 Elastic Claw Wall 5-2 Rear Edge 5 -3 Peripheral wall part 5a Locking part 6 Seal ring member 7 Bushing member 8 Mold 8-1 Projecting wall 9 Core member 9-1 Step part 10 Mold 10-1 and 10-2 Injection port 11 Punch tool 12 Hole 13 Notch P Piping P'Bulging wall

Claims (6)

[Claims] 1. A stepped small diameter chamber (3-1) having an enlarged diameter, which is connected to a communication hole (4) of a connecting cylinder wall (2) on the tip side inside the shaft core,
A connector body (1) having a stepped large-diameter chamber (3) penetrating the rear part thereof, and engaging holes (1-3) formed in a peripheral wall (1-2) formed by the large-diameter chamber. A seal ring member (6) and a bush member (7) are provided inside the small-diameter chamber (3-1), and the large-diameter chamber (3) is provided on the peripheral wall of the central hole of the shaft. A plurality of tongue-shaped elastic claw walls (5-1) that are located in the front part in the assembly direction and incline inward,
In addition, at least the tip of the claw wall is fixed and internally mounted with a socket body (5) made of a metal elastic material having a mold portion (8) molded of a resin material, and elastic when the pipe (P) is connected. A structure in which an outward annular bulging wall (P ') portion near the connection end portion of the pipe incorporated inside by the tip portion of the claw wall (5-1) is elastically pressed and connected. A connector for small diameter piping that is characterized by 2. The socket body (5) has a rear end peripheral edge (5-2) portion of a peripheral wall portion (5-3) of the large diameter chamber (3).
Of the engaging hole (1-3) formed in the
The connector body (1) is fixed to the stepped portion of the inner peripheral surface of 1) by fixing it, or the engaging portion (5a) provided on the middle side or the tip edge portion excluding the elastic claw wall (5-1). The connector for connecting small-diameter pipes according to claim 1, wherein the connector is molded and fixed to the opposing portion of the above. 3. The peripheral wall portion (5-3) excluding the elastic claw wall (5-1) portion formed by the socket body (5) is formed so as to have a C-shaped cross section. The connector for small diameter piping described in 2. 4. The outer projecting wall (8-1) is integrally formed on the outside of the mold (8) formed by the socket body (5). Connector for small diameter piping. 5. A metal elastic material having a plurality of tongue-shaped elastic claw walls which are located in front of the peripheral wall portion of the preformed center hole of the shaft center in the assembling direction and are biased inwardly inclined. The connector body is molded by injection molding a resin material with the rear end peripheral part of the socket body is hooked at a predetermined position of the core member and coaxially set inside the mold for molding the connector body. And a method for producing a connector for small diameter pipe connection, characterized in that the socket body is fixed to the inner peripheral surface side of the connector main body and internally provided in accordance with the molding of at least the tip portion of the claw wall. . 6. A plurality of tongue-shaped elastic claws which are located in front of a peripheral wall portion of a preformed center hole of a shaft center in an assembling direction and which protrude toward the front of the peripheral wall or are opened. A socket body made of a metal elastic material having a wall is attached by hooking the peripheral edge of its rear end to a predetermined position of the core member, and then the resin material is injected with the connector body coaxially set inside. With molding of the connector body by molding, and molding at least the tip of the claw wall,
Fix the socket body to the inner peripheral surface of the connector body,
Thereafter, the claw wall portion is configured to be inclined inward by being pressed from the outside through an engagement hole on the connector body side, and a method for manufacturing a connector for a small diameter pipe.