JPH0649994Y2 - Connector for small diameter piping - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention has a pipe diameter of 20 m / m, which is generally provided as a supply passage for refueling, air supply, etc. in automobiles or various machines and equipments.
The present invention relates to an improvement in the structure of a connector for pipe connection having a relatively small diameter, which is made of a metal material or a resin material of a certain degree or less.

[Prior Art] Conventionally, as shown in FIG. 4, a connector body of this kind has a connection body (11) in a pipe connection state as illustrated in FIG.
The expanded diameter assembly chamber (1) is formed by pressing the seal ring member (14) installed in the small diameter chamber (12) penetrating inside the shaft core of
A cylindrical bush (15) having a collar wall that engages with the stepped portion of 3) is movably attached to the peripheral surface of the small diameter chamber (12) or the assembly chamber (13) simply. It was configured in the state.

[Problems to be Solved by the Invention] However, in such a conventional structure, the movable internal structure of the bush (15) causes the internal pressure to increase as the internal pressure during use increases, or the internal pressure constantly changes. The bush (15) itself moves in the axial direction during use in a state where it fluctuates and vibrates, so that the socket is often formed by the claw wall (16) provided on the peripheral edge of the rear end of the joint body (11). In consideration of the elastic engagement with the body (17), the engagement portion may be disengaged or damaged, or the seal ring member (1
There was a problem that the wear of 4) occurred and the function as a connector became defective.

The present invention eliminates the concern about the movement of the bush itself even when the internal pressure is increased or the internal pressure fluctuates and is used in a vibrating state, and takes into consideration the elastic engagement by the socket body during long-term use. It is an object of the present invention to propose a connector for connection which can be securely connected without any fear of disengagement or damage at the engaging portion and wear of the seal ring member.

[Means for Solving the Problem] In the present invention, a stepped small diameter chamber and a stepped assembly chamber having a diameter increased behind the shaft are provided in the shaft core in a continuous manner with a flow hole on the tip side, and A fitting main body having a claw wall protruding inwardly at the rear end peripheral portion of the assembling chamber, and a seal ring member inside the small diameter chamber, and the seal ring member is pressed behind the seal ring member to assemble the assembling chamber. A short cylindrical bush having a flange wall that engages with the stepped portion on the side is inserted and further attached to the pipe connection side at the tip end portion that is detachably mounted in the assembly chamber portion. And a separate socket body that presses the annular bulging wall portion, and in the connected state of the pipe, the claw wall portion of the joint body side is provided on the free inclined wall portion formed by the slit wall of the socket body, the groove portion. Elastically engaged with the rear wall of the joint body and projecting the vicinity of the rear end of the free wall from the periphery of the rear end of the joint body. In the connection connector configured as described above, the bush is in a state of being engaged with the stepped portion on the assembly chamber side by pressing the seal ring member and facing the small diameter chamber of the joint body or the assembly chamber. The gist of the present invention is a connector for connecting a small diameter pipe, which is configured to be hooked on an insertion peripheral surface, and further, a hooking means for the bush is provided with an annular projection wall provided on an outer peripheral surface on the bush side for the small diameter chamber. Which is engaged with an annular groove provided on the inner peripheral surface on the side, or is formed by engaging the collar wall portion of the bush with an annular groove provided on the inner surface on the assembly chamber side. Is.

[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 connecting a small diameter pipe of the present invention in a connected state, and FIG. 2 is a semi-convex shape showing a hooking means of a bush according to another embodiment of the present invention. FIG. 3 is a longitudinal sectional view of a portion, and FIG. 3 is a view corresponding to FIG.
(1) is a joint body made of a metal material or a resin material,
A stepped small-diameter chamber (2) connected to a connecting cylindrical flow hole (4) of a flexible hose (not shown) protruding toward the tip side inside the shaft core.
And a stepped assembling chamber (3) having an expanded diameter in the rear thereof, and a claw wall (5) projecting inwardly at the rear end peripheral edge (3 ') of the assembling chamber. It will be. (6) is a seal ring member made of an elastic material such as rubber. A plurality of seal ring members are installed on the side of the small diameter chamber (2) with a contact plate or the like interposed as desired, and the seal ring member is pressed behind the seal ring member. A short cylindrical bush (7) having a collar wall (7 ') that engages with the stepped portion on the side of the assembly chamber (3) is inserted.

(8) is a socket body made of a resin material, which is detachably mounted in the assembling chamber (3), and has an annular bulging wall provided at the tip end thereof on the connection side of the pipe (T). (T ')
The claw wall (5) is elastically engaged with the groove (9) provided in the free inclined wall (8 ') formed by the slit wall while pressing the portion. Reference numeral (10) is a hook on the insertion peripheral surface of the bush (7) which faces the joint body (1) side, and has an arc-shaped cross section (on the outer peripheral surface on the bush (7) side as the locking means ( (Fig. 1) or wedge-shaped (3rd
(Fig.) Is engaged with an annular groove formed in the inner peripheral surface on the side of the small diameter chamber (2), or has no slit (Fig. 1) or has slit (Fig. 2). ) The collar wall (7 ') of the bush (7) is attached to the assembly chamber (3).
It is configured by engaging with an annular groove portion provided on the inner peripheral surface on the side.

[Operation] Since the present invention is configured in this way, the piping (T)
In the state where the bush (7) is pressed (10) by pressing the seal ring member (6) installed inside,
The seal ring is formed by inserting the connection side of the pipe (T) in which the socket body (8) is assembled in advance over the assembly chamber (3) and the small diameter chamber (2) inside the shaft core of the joint body (1) side. The claw wall (5) of the rear end peripheral edge (3 ') of the joint body (1) is closely fitted to the member (6), and at the same time, the groove of the free inclined wall (8') formed by the slit wall of the socket body (8). It will be elastically engaged with the portion (9).

[Advantages of the Invention] As described above, the connector for small-diameter pipe connection according to the present invention has a small-diameter chamber on the side of the joint body (1) in a state where the seal ring member (6) by the bush (7) is pressed. (2), or because it is configured so as to be hooked (10) to the facing peripheral surface of the assembly chamber (3), even if the internal pressure increases during installation and use, or the internal pressure fluctuates constantly. In addition, even during use in a vibrating state, there is no fear of the bush (7) itself moving in the axial direction, so that the elastic engagement by the socket body (8) becomes loose during long-term use. At the same time, at the same time, it is possible to prevent the detachment or damage of the groove (9) of the socket body (8) by the claw wall (5) of the joint body (1) side, and prevent the wear of the seal ring member (6). Extremely useful small-diameter pipe that can be securely and securely connected It is a connection for the connector.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a connector for connecting a small diameter pipe showing an embodiment of the present invention in a connected state, and FIG. 2 shows a hooking means of a bush according to another embodiment of the present invention. FIG. 3 is a vertical cross-sectional view of a part having a semi-vertical shape, FIG. 3 is a view corresponding to FIG. 2 of another embodiment, and FIG. (1) ...... joint body, (2) ... small diameter chamber, (3) ... assembly chamber, (6) ... seal ring member, (7) ... bush, (7 ') ... collar wall, (10) ... hanging

Claims (2)

[Scope of utility model registration request] 1. A small-diameter chamber having a step and a stepped assembly chamber having an enlarged diameter rearwardly extending through a flow hole on the front end side inside the shaft core, and a peripheral edge of a rear end of the assembly chamber. The main body of the joint having a claw wall protruding inward and a seal ring member on the side of the small diameter chamber, and the seal ring member is pressed to the rear of the joint body to engage with the stepped portion on the side of the assembly chamber. A short cylindrical bush having a collar wall is inserted and attached, and further, an annular bulging wall portion provided on the connection side of the pipe is attached to the tip end portion of the assembly chamber portion which is detachably mounted. It is composed of a separate socket body for pressing, and while the pipe is connected, the claw wall portion of the joint body side is elastically engaged with the groove portion provided in the free inclined wall portion formed by the slit wall of the socket body. , A connecting connector formed by projecting the vicinity of the rear end of the free wall to the outside from the peripheral edge of the rear end of the joint body. In the state where the bush (7) is engaged with the stepped portion on the side of the assembly chamber (3) by pressing the seal ring member (6), the small diameter chamber (on the side of the joint body (1) ( 2) or a connector for connecting a small-diameter pipe, characterized in that the connector is hooked (10) on the opposing peripheral surfaces of the assembly chamber (3). 2. The utility model registration claim, wherein the bushing (7) has a hooking means (10), and an annular projection wall provided on the outer peripheral surface on the bushing side is the small diameter chamber (2). Side wall of the bushing (7), or the flange wall (7 ') of the bush (7) is provided on the inner peripheral surface of the assembly chamber (3) side. A connector for small-diameter pipes, characterized by being configured to engage with an annular groove.