JP2518869Y2 - T-type branch connection structure - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is generally used for automobiles, various machines, devices, etc., and is provided with a pipe diameter of about 20 mm as a supply passage for fuel, other oil supply, air supply, etc. The present invention relates to the improvement of a T-shaped branch connection structure for a metal tube or a resin tube having a relatively small diameter as described below.

(Prior Art) Conventionally, as a branch connection structure of this type, for example, as shown in FIGS. 4 and 5, in a metal pipe, a through hole (22) is provided in the shaft core portion, and the through hole (22) is formed. By using the joint body (21) which is connected to the hole and has the branched cylindrical hole (23) orthogonally in the peripheral wall portion by casting or forging, the metal main pipe (P ₁ ′) is provided in the through hole (22). ), A metal branch pipe (P ₂ ′) is incorporated in the branch cylindrical hole (23), and the engaging peripheral surfaces of these are connected by heating and brazing (24).

(Problems to be solved by the invention) However, in such a conventional technique, the structure of the joint body (21) formed by casting or forging is made relatively thick to increase the weight of the branch connection structure and to incorporate it. However, the brazing work associated with local heating by a burner or the like on the mutual engagement peripheral surfaces causes troublesome work, and the connection of thin metal tubes due to heating often causes brazing ( Due to deterioration of mechanical strength, part 24) will be cracked or damaged by vibration under the installed condition. Further, in connection with the brazing (24), it is inevitable that a corrosion resistant coating treatment is subsequently applied by plating or the like, so that there is a problem that the treatment property is significantly impaired.

Further, when the main pipe or the branch pipe to be connected is a resin tube, an adhesive or the like has to be used, so that the connection strength is not sufficient, and improvement thereof has been demanded.

The present invention has been made in view of the above problems of the prior art. In addition to reducing the weight of the branch connection portion, the rib wall increases the strength of the entire connection structure, and further, the brazing work is not necessary, and the connection work It reduces the troublesomeness of work, eliminates the fear of cracks and damages at the connection part due to the deterioration of mechanical strength due to the heat effect, and when the main pipe or branch pipe is a metal pipe, it is necessary to perform plating treatment beforehand. A T-shaped branch connection structure that enables the mutual application of the applied component parts and eliminates the need for a plating film treatment after connection, and that can obtain sufficient connection strength even when connecting a resin tube. It is intended to be a proposal.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a through hole in a shaft core,
The T-shaped inner joint member made of an elastic material having a branched cylindrical hole that communicates at a right angle to the through hole has a diverting port bored on the circumferential side in the through hole portion, and is provided near the diverting port. A main pipe having an outward annular bulging wall on its peripheral surface is fitted in the branch port so as to coincide with the branch cylindrical hole portion, and at the same time an outward annular shape is provided in the branch cylindrical hole portion near the connecting end. The end portion of the branch pipe having the bulging wall is inserted and inserted, the tip end portion of the branch pipe is inserted into the flow dividing port, and the inner joint member is attached to the attachment port in advance near the connection end portion formed by the branch pipe. The thin tubular metal frame, which is attached together, holds the entire branch in a press-fit state by the rib wall formed by pressure polymerization on the peripheral wall extending in the axial direction on the left and right of the branch tubular hole. The gist of the present invention is the T-type branch connection structure.

(Operation) Since the present invention is configured in this way, the main pipe and the branch pipe are fitted to the through hole portion and the branch cylindrical hole portion of the inner joint member made of an elastic material such as rubber or resin. Further, since the inner joint member is press-molded by a short-sized tubular thin-walled metal frame to be pressure-polymerized and the rib wall is formed, the entire inner joint member is press-fitted to form a branch connection portion. Can be made lighter, and the need for brazing work is reduced to reduce the complexity of work at the time of connection, and at the same time cracks in the installed state due to the deterioration of mechanical strength due to the heat effect at the connection part, It eliminates the fear of breakage and, in the case of metal pipes, allows the mutual use of components that have been pre-plated, etc., and the rib walls that have been formed increase the rigidity of the overall branch connection structure, and Stable connection structure by taking advantage of the combined enclosing structure Will form a part.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a T-type branch connection structure of the present invention, FIG. 2 is a partially cutaway sectional view taken along the line AA of FIG. 1, and FIG. 3 is pressure polymerization on a metal frame body of FIG. It is a perspective view showing a previous state,
(1) is a T-shaped inner joint member made of an elastic material such as rubber or resin, and has a through hole (2) and a branched cylindrical hole (3) communicating with the through hole at the center of the shaft. It has. Then, a metal or resin main pipe (P ₁ ) having a diversion port (5) formed on the circumferential side is fitted into the through hole (2) so that the diversion port matches the branch cylindrical hole part. In addition, an outward annular bulging wall (8 ') near the connecting end of the branch cylindrical hole (3).
A branch pipe (P ₂ ) made of a metal or a resin having the above is inserted and attached to the end portion of the branch pipe and inserted into the diversion port (5). (4) is a short-sized tubular thin-walled metal frame, and an inner joint member is formed by engaging an assembling port (6) formed on the peripheral wall of the thin tubular metal frame with a branch tubular portion into which a branch pipe (P ₂ ) is fitted. In the state of being pre-attached to the outside of (1) (state of FIG. 3), the branch pipe hole (3) in which the branch pipe (P ₂ ) is fitted is left by press working and extends in the left and right axial direction. The peripheral wall is pressed and polymerized,
If necessary, the overlapped surface is spot-welded to form a rib wall (7) in the axial direction, and the whole is held in a press-fit state.

The annular bulging wall (8) is an outward annular bulging wall provided on the peripheral surface of the main pipe (P ₁ ) fitted in the through hole (2) on the inner joint member (1) side. Therefore, the inner surface of the through hole (2) on the inner joint member (1) side is tightly connected to the peripheral surface of the through hole (2) on the inner joint member (1) side in a press-fitting wrapped state by the thin metal frame body (4).

(Effects of the Invention) As described above, the T-shaped branch connection structure according to the present invention wraps the inner joint member (1) and the rib wall (7) associated with the press-polymerization in a press fit manner. Since the branch connecting structure formed by the main pipe (P ₁ ) and the branch pipe (P ₂ ) is configured by the short tubular thin-walled metal frame body (4), the branch connecting portion can be made lightweight and at the same time brazed It eliminates the need for work, reduces the complexity of work at the time of connection by press-polymerization by press working, and is suitable for vibration under the installation condition due to deterioration of mechanical strength due to heat effect at the connection part. Even if the main pipe or branch pipe is a metal pipe, it is possible to use components that have been pre-plated, etc., and to perform mutual plating after connection. It is not necessary, and the rib wall (7) formed also divides The rigidity of the entire connecting portion is increased, a stable connecting portion can be formed by the press-fitting enclosing structure, and sufficient connecting strength can be obtained even when connecting the resin tube. It is a useful T-type branch connection structure.

[Brief description of drawings]

FIG. 1 is a side view of a T-type branch connection structure showing an embodiment of the present invention, FIG. 2 is a partially cutaway sectional view taken along line AA of FIG. 1, and FIG. 3 is a metal frame of FIG. FIG. 4 is a perspective view showing a state before pressure polymerization of the body, FIG. 4 is a side view of a T-shaped branch connection structure showing a conventional example,
FIG. 5 is a partially cutaway sectional view taken along the line BB of FIG. (1) …… Inner connection member, (2) …… Through hole, (3)
…… Branch cylinder hole, (4) …… Metal frame, (5) …… Shunt port, (6) …… Assembling port, (7) …… Rib wall, (8)…
… Bulging wall, (P ₁ ) …… Main pipe, (P ₂ ) …… Branch pipe

Claims (1)

(57) [Scope of utility model registration request] 1. A T-shaped inner joint member (1) made of an elastic material having a through hole (2) in a shaft core and a branched cylindrical hole (3) communicating with the through hole at right angles. The main pipe (P ₁ ) having a diverting port (5) bored on the peripheral side in the hole part and having an annular bulging wall (8) outward on the peripheral surface part near the diverting port The mouth is fitted to the branch cylindrical hole (3) so as to match,
The end portion of the branch pipe (P ₂ ) having an outward annular bulging wall (8 ′) near the connection end portion is inserted into the branch cylindrical hole portion, and the tip end portion of the branch pipe is attached to the branch port. Short tubular thin-walled metal inserted into (5) and further attached by attaching the inner joint member (1) to the connecting end formed by the branch pipe (P ₂ ) in advance by engaging the assembling port (6). The frame body (4) is configured so that the whole is press-fitted by the rib wall (7) formed by pressure polymerization on the peripheral wall extending in the left and right axial center directions of the branched cylindrical hole (3) portion. A T-type branch connection structure characterized in that