JP2502471Y2 - Fitting for small diameter piping connection - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a pipe diameter or a thickness of 15 m / m, which is generally provided as an oil supply or air supply passage in an automobile or various machines and devices. The present invention relates to an improvement in the structure of a joint for connecting a metal tube and a resin tube (hereinafter simply referred to as pipes) each having a relatively small diameter of about a certain degree or less.

[Prior Art] Conventionally, as a joint for connecting a small diameter pipe of this kind, as shown in FIG. 4, for example, a distribution of a cylindrical wall (23) for connection of a resin tube or a rubber hose protruding in one axial direction is provided. Assembled hole (2
2), and an annular engaging wall (25) is integrally provided on the side of the maximum diameter of the peripheral wall (24) where the metal pipe is connected, and a plurality of engaging holes (26) are further provided. A joint main body (21) and a tubular support (27) having an elastic claw wall (28) which is engaged with the engaging wall (25) at its rear side and is inclined inward toward the cylindrical wall (23); is constituted by, provided on the outer peripheral surface of the connecting end portion vicinity of the pipe (P ₁₎ of the pipe in close contact with the inserted by sealing ring member to the small diameter portion of said assembly holes there at the time of connection (22) (P ₁₎ The annular bulging wall (P ₁ ′) is engaged with and connected to the elastic claw wall (28) of the tubular support (27).

[Problems to be Solved by the Invention] However, in such a conventional technique, while forming a hanging hole (26) formed of an elongated hole in the peripheral wall portion (24) on the joint body (21) side, With the structure in which the engaging wall (25) is integrally provided, and the structure of the tubular support (27) having the elastic claw wall (28) additionally engaged with the engaging wall,
The structure is complicated, and the product has to have a large longitudinal dimension. Therefore, it often causes a problem when it is used in a narrow place at the time of installation or a place where a complicated bend is generally required. Since the engagement between the wall (28) and the annular bulging wall (P ₁ ′) is performed inside the joint body (21), there is a problem that the properness of the connection state cannot be confirmed from the outside.

The present invention has been made in view of the above problems of the prior art, and has a product structure that is simple in structure and has a compact axial dimension, and requires a complicated bend in a narrow space for installation. An object of the present invention is to provide a connection joint that can be used even if it is at a location without any trouble, and that a stable and reliable connection state can be maintained for a long period of time and that the properness of the connection state can be visually confirmed from the outside. It is what

[Means for Solving the Problem] In order to achieve the above object, the present invention has a pipe insertion hole formed in the center of a bottom wall, and a peripheral wall inclined inward toward the bottom wall. A retainer member having a bottomed cylindrical body integrally provided with a plurality of supporting claw walls projecting upward, and a communication hole connected to a stepped expanded portion provided inside an end portion on the side of connection with the retainer member. Are provided continuously, and an annular engaging groove extending in the circumferential direction is provided on the outer peripheral portion, or a plurality of engaging grooves having a stepped end at the end connected to the retainer member are circumferentially spaced. It consists of the socket member provided, and when connecting pipes,
An annular bulging wall provided on the outer peripheral surface near the connecting end of the pipe is engaged with the bottom wall of the retainer member, and the outer peripheral surface on the tip end side of the pipe is inserted into the stepped expanded portion and a seal. The retainer member and the outer peripheral surface of the socket member are in contact with each other or hold a minute gap, the supporting claw wall portion of the engaging member of the engaging groove of the socket member. The gist of the first invention is a joint for connecting small-diameter pipes configured to be elastically hooked on a step portion, and the second invention is the gist of the first invention, wherein the bottom wall of the retainer member is The confirmation means further comprises a confirmation member fitted in the provided through hole, and a pin body protruding from the socket member on the end face of the socket member on the coupling side of the retainer member so as to face the through hole and pressing the confirmation member. It is configured by.

[Operation] Since the present invention has such a configuration, the retainer member of the bottomed cylindrical body is integrally provided with a plurality of support claw walls that project inwardly toward the bottom wall at the peripheral wall portion thereof. Since it is configured, the structure is extremely simple, and the product shape is such that the joint is in the connected state of pipes and the axial dimension is compact. Therefore, in the place where it is installed, especially in a place where a complicated bend is required. The joint can be used without any hindrance, and the outward annular bulging wall provided near the connecting end of the pipe is engaged with the bottom wall of the retainer member, and the inner peripheral surface of the retainer member and the Since the socket member is completely inserted into the retainer member and connected to each other with the outer peripheral surface of the socket member abutting or holding a minute gap, the positional relationship between the retainer member and the socket member. Is stable It is possible to confirm from the outside that the reliable connection state is maintained for a long period of time, and the engagement claw wall is engaged with the stepped portion of the engagement groove from the outside, and provided on the bottom wall portion of the retainer member as desired. By confirming that the confirmation member fitted in the through hole falls, it is possible to confirm from the outside whether the connection state is proper or not.

[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing a state before connection of a joint for connecting a small diameter pipe of the present invention, FIG. 2 is a vertical cross-sectional view showing a joint state of the joint shown in FIG. FIG. 3 is a plan view of a socket member alone according to another embodiment, in which (1) is a retainer member, and an insertion hole (2) for a pipe (P) is formed at the center of a bottom wall (1 ′) thereof. In addition, the peripheral wall portion is composed of a bottomed cylindrical body integrally provided with a plurality of supporting claw walls (3) projecting inwardly toward the bottom wall. (4) is a socket member, and a cylindrical body (4a) having an outer diameter that is substantially equal to or slightly smaller than the inner diameter of the retainer member (1) provided on the side of connection with the retainer member, and the cylinder. A cylindrical wall (4b) for connecting a resin tube or a rubber hose that integrally extends in the axial direction from the body, and a stepped expanded portion (6) is provided inside one end of the cylindrical body (4a). In addition, the flow-through hole (5) is connected to the expanded diameter portion. Further, as shown in FIGS. 1 and 2, an annular engaging groove (7) is provided in the outer peripheral portion of the cylindrical body (4a) of the socket member (4), or as shown in FIG. Thus, a plurality of axially extending grooves (7) starting from the side of the cylindrical wall (4b) and ending at the step (7 ') are provided at intervals in the circumferential direction. Then, at the time of connecting the pipe (P), the retainer member (1) is provided with the annular bulging wall (P ') provided on the outer periphery near the connection end of the pipe (P).
The pipe (P) is penetrated through the insertion hole (2) of the retainer member (1) so that the collar (9) and the seal ring (8) can be positioned inside the stepped expanded portion (6). ) Is inserted into the retainer member (1). By this insertion operation, the annular bulging wall (P ') of the pipe (P) is engaged with the bottom wall (1') of the retainer member (1), and the outer peripheral surface of the pipe (P) on the tip end side is the collar (9). ) And a seal ring (8), and at least a pair of supporting claw walls (3) facing each other with the cylindrical body (4a) interposed therebetween are bent inward toward each other to form a step of the engaging groove (7). The retainer member (1) is constructed so as to elastically hang on the portion (7 '). When the socket member (4) is completely inserted into the retainer member (1) and the two are connected, the retainer member (1) The inner peripheral surface and the outer peripheral surface of the socket member (4) come into contact with each other or hold a minute gap.

(10) is a pin body axially protruding from the end surface of the socket member (4) on the connecting side of the retainer member (1) in the joint according to the second claim, and the bottom wall of the retainer member (1) When the connection is completed, a confirmation member (12) made of a plug fitted in a through hole (11) provided at a position opposite to (1 ') is pressed when the connection is completed, and the confirmation member (12) is passed through the through hole (11). It is a confirmation means for determining whether the connection state is proper by further protruding and dropping.

[Advantage of the Invention] As described above, in the joint for connecting a small diameter pipe according to the present invention, the retainer member (1) of the bottomed cylindrical body is inclined inward toward the bottom wall (1 ') at the peripheral wall portion thereof. Since the plurality of protruding claw walls (3) are integrally provided, the structure is simple, and it is possible to shorten the axial dimension of the joint in the connected state of the pipe (P). With its compact shape, it is possible to perform connection and use in a narrow place at the time of installation in a place where a complicated bend is generally required without any trouble, and the socket member (4) is provided in the retainer member (1). ) Is completely inserted and both are connected,
While the inner peripheral surface of the retainer member and the outer peripheral surface of the socket member are in contact with each other or a slight gap is maintained, the support claw wall (3) elastically springs to the stepped portion (7 ') of the engaging groove (7). Since the retainer member (1) and the socket member (4) are stably connected with each other for a long period of time, the retainer member (1) and the socket member (4) are visually checked from outside to see if they are properly connected. It is an extremely useful joint for connecting small diameter pipes that can be confirmed by.

[Brief description of drawings]

FIG. 1 is a plan view of a joint for connection of a small diameter pipe showing an embodiment of the present invention before connection, and FIG. 2 is a vertical cross-sectional view showing a connection state of the joint shown in FIG. FIG. 3 is a plan view of a socket member alone according to another embodiment, and FIG. 4 is a partially cutaway sectional view of a connection joint showing a conventional example. (1) ... Retainer member, (1 ') ... Bottom wall, (2) ...
… Insertion hole, (3) …… Supporting claw wall, (4) …… Socket member, (4a) …… Cylindrical body, (4b) …… Cylindrical wall, (5) …… Circulation hole, (6) …… Stepped expanded part, (7) …… Engagement groove,
(7 ') ... step, (8) ... seal ring, (9) ...
… Color, (10) …… pin body, (11) …… through hole, (12)
…… Confirmation member, (P) …… Piping, (P ′) …… Bulging wall

Claims (2)

(57) [Scope of utility model registration request] 1. A plurality of piercings, each of which has a pipe insertion hole (2) formed through a central portion of a bottom wall (1 ') and which projects on a peripheral wall portion while inclining inward toward the bottom wall. In succession to a bottomed cylindrical retainer member (1) integrally provided with a claw wall (3) and a stepped expanded portion (6) provided inside an end portion on the side of connection with the retainer member. The circulation hole (5) is continuously provided, and an annular engaging groove (7) is provided on the outer peripheral portion in the circumferential direction, or the end on the side of connection with the retainer member is a stepped portion (7 '). An annular groove formed on the outer peripheral surface near the connection end of the pipe (P) at the time of connecting the pipe (P) The bulging wall (P ') is engaged with the bottom wall (1') of the retainer member (1), and the outer peripheral surface on the tip end side of the pipe (P) is placed inside the stepped expanded portion (6). A state in which the collar (9) and the seal ring (8) that are attached are engaged with each other, and the inner peripheral surface of the retainer member (1) and the outer peripheral surface of the socket member (4) are in contact with each other or hold a minute gap. The small diameter pipe connection is characterized in that the engaging claw wall (3) is elastically hooked on the step (7 ') of the engaging groove (7) of the socket member. For fittings. 2. A confirmation member (12) fitted into a through hole (11) formed in a bottom wall (1 ') of the retainer member (1) and a socket member (4) on the connecting side of the retainer member. 2. The small-diameter pipe according to claim 1, further comprising a confirmation means formed on an end face of the pin body (10) protruding from the through hole (11) and pressing the confirmation member. Joint for connection.