JP3192682B2 - Installation structure of eye joint with branch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a relatively thin metal pipe or a resin pipe having a diameter of about 20 m / m or less, which is provided as a supply path for oil supply and air supply to an automobile or various machines and devices. The present invention relates to a mounting structure of an eye joint as a fixing means at a connection end of a tube (hereinafter, referred to as a pipe).

[0002]

2. Description of the Related Art Conventionally, as an attachment structure of this type, as shown in FIG. 4, for example, an eye joint body (21) with a branch formed by cutting, forging or casting a metal material and then cutting the metal material is used. In a state where the metal pipe (P ′) is connected by heating brazing (W) to the connecting cylinder wall (22) protruding from the side, packings (24) are respectively attached to the pressing surface and the pressure receiving surface of the main body. It was configured to be laid, interposed and screwed onto the surface of the base (23) with a fastening bolt (B ') to fasten and attach.

[0003]

However, in such a conventional technique, as described above, the formation of the eye joint body (21) requires a great deal of man-hours, increases the manufacturing cost, and is made of a metal material. Due to the heavy weight and the connection structure by heating brazing in the pipe (P '), the plating film made of zinc or the like previously applied in relation to corrosion resistance is lost, and therefore, the plating is performed again after the brazing. Treatment requires a significant decrease in workability, and at the same time, due to local overheating during brazing, mechanical strength often deteriorates near the brazed part on the pipe (P ') side. In combination with the vibration, cracking and breakage occurred. In addition, the installation of the packing (24) is troublesome because it requires the installation of the packing (24), and the tightening torque is not uniform when tightening the tightening bolt (B ') having the straight shaft structure through the packing (24). Due to these factors, the sealing surface pressure of the packing (24) tends to be unstable, causing problems such as causing leakage for a long period of time.

When the pipe (P ') is a resin tube, as shown in FIG. 5, the resin tube (P') is provided on the outer periphery of the connecting cylinder wall (22).
In this case, the annular bulging wall (22 ') must be separately cut out and formed, and the production time is further complicated.

The present invention has been made in view of the above-mentioned problems of the prior art, and is easy to manufacture and lightweight, and it is not necessary to lay a separate packing to achieve the packing function with the eye joint body. When connecting the pipe at the connecting cylinder wall, it is possible to use the pipe coated with a plating film in advance, to improve workability by eliminating the need for plating again, cracks on the pipe side near the connection, Eliminates the fear of breakage, and even if the torque at the time of tightening with the tightening bolts becomes uneven, the sealing surface pressure is kept constant to prevent the induction of leakage, and the flexible flexibility of the connecting cylinder wall It facilitates the adjustment of the piping arrangement, and proposes a branch eye joint mounting structure that does not require special processing on the connection tube wall even if the piping is a resin tube. It is an object of the present invention Rukoto.

[0006]

According to the present invention, in order to achieve the above object, a connecting cylindrical wall is formed on the peripheral side of an annular wall of an eye joint body, and a threaded surface is formed on a shaft body. And a communication hole to an internal flow hole, and a fastening bolt provided with an engaging wall at the top, the bolt is inserted into the shaft hole of the eye joint body, and the body is placed on the base. Screw,
In an attachment structure that is pressed and fastened, the eye joint body is formed of an elastic material, and spacing means is provided for maintaining a predetermined gap between the head seat surface of the fastening bolt and the surface of the base. Further, the invention is characterized in that a pipe is connected to the connecting cylinder wall portion, and a branch eye joint mounting structure is formed, and the spacing means is a shaft peripheral surface portion of a tightening bolt engaged with a surface of the base. A collar interposed between a stopper wall or a seating surface of the head and a surface of the base provided on the head body, and a position facing the inner peripheral surface of the eye joint body on the shaft body side with the tightening bolt; Forming an annular concave groove communicating with the hole, or forming an annular concave groove by providing a reinforcing ring on the inner peripheral surface portion of the shaft core hole of the eye joint body, and the elastic material is made of rubber. What The piping in the connection cylinder wall are connected by the fastening member, the pipe is to configure and fixed to the base by a clamp.

[0007]

According to the present invention, the eye joint body with branches integrally formed by injection molding or the like of the elastic material is provided between the seat surface of the head of the tightening bolt and the surface of the base. With a spacing means such as a stopper wall or a collar to maintain a predetermined spacing, and a piping connection structure at the connecting cylinder wall, it is easy to manufacture and a lightweight eye joint body is used to exhibit the packing function and separate packing. It is unnecessary, and furthermore, it is possible to use pipes that have been plated in advance in relation to corrosion resistance, and it is possible to improve workability by eliminating the need for re-plating after connection, and at the same time, piping near the connection part No cracks on the side, no fear of breakage,
If there is an inclination of the tightening bolt when tightening with the tightening bolt, this is absorbed by the eye joint, and even if the tightening torque is uneven, the sealing surface pressure is kept constant to prevent the induction of leakage. The flexible arrangement of the connecting cylinder wall facilitates the arrangement and adjustment regardless of the type of piping.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cut-away longitudinal sectional view of a mounting structure of an eye joint with a branch according to the present invention; FIG. FIG. 3 is a partially enlarged cross-sectional view of another embodiment of the present invention. FIG. 3A is an eye joint body formed by integrally molding an elastic body such as rubber by injection molding. A connecting cylinder wall (1 ") communicating with the inner shaft hole (2) is integrally formed on the peripheral side of the wall (1 '). The (3) is a fastening bolt,
It has a screw surface (4) on the tip side, a communication hole (5 ') to the internal flow hole (5) on the peripheral wall, and a head (3') with a spanner etc. on the top.
A stepped stopper wall (3 ") as a spacing means is provided on the peripheral surface of the shaft body provided with .The tightening bolt (3) is attached to the shaft center hole (2) of the eye joint body (1). The stopper wall (3 ") is engaged with the surface of the base with the screw-fastening to the base (7) in a state of being inserted into the part, so that the height of the eye joint body (1) is increased. The head
(3 ') is formed to be slightly larger than the distance between the seating surface and the stopper wall (3 ").
(P) is a band as a fastening member for connection.
Numeral (8) is an annular groove, which is formed in FIG. 1 through the communication hole (5 ') on the shaft body side of the tightening bolt (3), facing the inner peripheral surface of the eye joint body (1). I do. Further, as shown in FIG. 2, the annular concave groove (8 ') may be formed on the inner peripheral surface of the eye joint body (1) and provided with a reinforcing ring (9) made of a metal material. Can be integrally molded by placing a reinforcing ring (9) in a mold in advance and injecting a rubber material or the like into the mold and then curing.

Reference numeral (11) denotes a clamp provided for preventing the pipe (P) from swaying and fixing the pipe (P) to the base (7). Next, FIG. 3 shows still another embodiment.
In this embodiment, unlike the previous embodiment, a general tightening bolt is used instead of the specially shaped tightening bolt (3), but the seating surface of the head (3 ') and the surface of the base (7) are used as spacing means. A separate collar (10) is interposed between them.

[0010]

As described above, the mounting structure of the eye joint with branches according to the present invention has a structure in which the eye joint body (1) is formed by integral molding such as injection molding of an elastic material, and the tightening bolt (3) is formed. Head (3 ') seat and base
(7) A spacing means is provided for maintaining a predetermined spacing from the side surface, and the pipe (P) is connected to the connecting cylinder wall (1 "). Since the packing function is exhibited with the eye joint body (1) with a branch made of material, there is no need to lay a separate packing, and furthermore, it is possible to use pipes (P) that have been plated in advance with regard to corrosion resistance and connected. Workability is remarkably improved by eliminating the need for re-plating on the pipe later, and there is no fear of cracking or breakage on the pipe (P) side near the connection, and
If the tightening bolt (3) is tilted when tightening with the tightening bolt (3), this is absorbed by the eye joint body (1), and even if uneven tightening torque occurs, the sealing surface pressure is kept constant. It is possible to prevent induction of leakage, and furthermore, the flexible arrangement of the connecting cylinder wall (1 ") makes it possible to easily adjust the arrangement regardless of the type of piping (P). This is a useful eye joint mounting structure.

[Brief description of the drawings]

FIG. 1 is a partially cutaway longitudinal sectional view of an eye joint mounting structure according to an embodiment of the present invention.

FIG. 2 is a diagram corresponding to FIG. 1 according to another embodiment.

FIG. 3 is a partially enlarged cross-sectional view according to still another embodiment.

FIG. 4 is a partially cutaway longitudinal sectional view of an eye joint attachment structure showing a conventional embodiment.

FIG. 5 is a partial sectional view showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Eye joint body 1 "Connection cylinder wall 3 Tightening bolt 3 'Head 3" Stopper wall 5' Communication hole 6 Band 7 Base 8, 8 'Annular groove 9 Reinforcement ring 10 Collar 11 Clamp P Piping

Claims (7)

(57) [Claims] 1. A connecting cylinder wall communicating with the inside of the eye joint body is formed on a peripheral side of an annular wall formed by an eye joint body, and further has a screw surface on a shaft portion and a communication hole to an internal flow hole. And a fastening bolt provided with a support wall at the top, the bolt is inserted into the shaft hole of the eye joint body, and the body is screwed onto the base, pressed and tightened. The eye joint body (1) is made of an elastic material, and the seating surface of the head (3 ') of the tightening bolt (3) and the base are formed.
(7) is provided with an interval maintaining means for maintaining a predetermined interval,
Further, a pipe (P) is connected to the connecting cylinder wall (1 ") portion, and a mounting structure for an eye joint with a branch is provided. 2. A head according to claim 1, wherein said spacing means is a stopper wall (3 ") provided on a shaft peripheral surface of a tightening bolt (3) engaged with a surface of said base (7). Department
Collar (10) interposed between the seating surface of (3 ') and the surface of the base (7)
A mounting structure for an eye joint with a branch, comprising: 3. An annular shape according to claim 1, wherein said fastening bolt (3) is located on a shaft portion side, facing an inner peripheral surface of an eye joint body (1), and communicates with said communication hole (5 '). Groove (8)
A mounting structure for an eye joint with a branch, characterized by forming: 4. The eye with a branch according to claim 3, wherein a reinforcing ring (9) is provided on the inner peripheral surface of the eye joint body (1) to form an annular concave groove (8 '). Joint mounting structure. 5. The mounting structure according to claim 1, wherein the elastic member is made of rubber. 6. The connecting cylinder wall according to claim 1, wherein
An attachment structure for an eye joint with branches, wherein the pipe (P) at the (1 ") portion is connected by a fastening member (6). 7. The mounting structure according to claim 1, wherein the pipe (P) is fixed to the base (7) by a clamp (11).