JP2544916Y2 - T-shaped coupling structure of pipe - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a structure for connecting a pipe to a T-shape.

[0002]

2. Description of the Related Art With respect to a method of welding a pipe with the end face of the other pipe abutting against the side face of the other pipe, a hole is provided in the side face of one pipe, and the tip of the other pipe is fitted therein and welded. Such a configuration is disclosed in Japanese Patent Publication No. 51-2301. Also, a semicircular concave surface larger than the outer diameter of one pipe is provided on the end surface of the other pipe, and this surface is formed as a side surface of one pipe. Japanese Patent Application Laid-Open No. 2-192880 discloses a method in which welding is performed by butt welding.

[0003] These welding techniques have the advantage that the end face of the other pipe can be firmly fixed to the side face of one pipe, but these are all directed to pipes of the same diameter. Therefore, like the frame of a motorcycle, such as joining the end face of a small-diameter sub-tube to the side of the cross pipe, such as joining means of different-diameter pipes where both the appearance and the joint strength of the product are asked at the same time, The former cannot be easily applied in that the appearance of the connecting portion is poor, and the latter does not provide sufficient bonding strength.

[0004] From such a viewpoint, in general, in a motorcycle, the end face of the subtube is welded by abutting the side face of the cross pipe, and a half-shell-shaped reinforcing plate is provided on both sides so as to further cover that part. By applying and welding
The reinforcement of the joint and the appearance of that part are arranged.

However, such a joining method requires a considerable amount of time to process the end surface of the subtube into a semicircle, weld the right and left reinforcing plates, and to use a case where an aluminum alloy is used for the frame material. In such a case, there is a problem that a vertical welded portion of these reinforcing plates is exposed and the appearance is spoiled.

[0006]

[Problem to be solved by the present invention] The present invention has been made in view of such a problem.
It is an object of the present invention to provide a new connecting structure that can connect pipes of different diameters relatively easily and in a T-shape without impairing the appearance.

[0007]

That is, the present invention provides a T-shaped coupling structure for a pipe having the same outer diameter as that of a large-diameter pipe and a small- diameter pipe for achieving such a problem.
After cutting one end of a joint pipe having an inner diameter capable of inserting a pipe with a diameter into a slant, insert the tip of a small-diameter pipe into this end, and connect the peripheral surface of the small-diameter pipe with the end face of the cut part. <Br / > While being integrated by welding, a semicircular concave surface formed at the other end of the joint pipe is brought into contact with the side surface of the large-diameter pipe so as to be integrated by welding.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The drawings show an embodiment of the present invention applied to a pipe connection portion of a motorcycle.

In the drawing, reference numeral 1 denotes a sub tube connected to a cross pipe 2 of a cradle frame in a T-shape. The sub tube 1 is formed as a pipe having a diameter smaller than the diameter of the cross pipe 2.

Reference numeral 3 denotes a joint pipe used for a joint portion between the two. The joint pipe 3 has an outer diameter substantially equal to the outer diameter of the cross pipe 2 and an inner diameter equal to the sub-tube 2.
Slightly than the outer diameter of the formed as a short pipe of large diameter, or
In addition, the one end into which the sub tube 2 is fitted is shown in FIG.
As shown, the diagonally cut and cross pipe 2
An arc-shaped coupling concave surface having substantially the same curvature as the outer peripheral surface is formed on the end surface 4 which is coupled to the end surface 4.

The thus formed joint pipe 3
In order to connect the end face of the subtube 1 to the side surface of the cross pipe 2 by using a pipe, first, the tip of the subtube 1 is fitted into the rear end of the joint pipe 3,
And integrating the peripheral surface is obliquely cut end face bonded to the welding 5.

Next, when the joint end face 4 of the joint pipe 3 is brought into contact with the side face of the cross pipe 2 to be joined and the both joint parts are joined by welding 6, the end face of the sub-tube 1 is connected via the joint pipe 3. And is firmly fixed to the side surface of the cross pipe 2.

Although the present invention has been described with reference to the embodiment applied to the frame of a motorcycle, another T-shaped coupling structure in which the end of a small pipe is connected to the side of a large pipe. The present invention can be applied to objects.

[0014]

According to the present invention as described [devised effects above, black
After having contacted soluble in one end of the joint pipe of the same diameter and Supaipu by inserting a small pipe diameter. Thus to bind abuts the other end surface of the joint pipe on the side surface of the large pipe diameter, smaller pipe diameters of without performing special processing of any in the end face, and coupling the portion of this one end of the joint pipe, on its, a small pipe diameter through the joint pipe constituting a substantially the same diameter as the larger pipe diameters strongly, it is possible to bind well body Court. In addition, small diameter
Cut the end of the joint pipe that connects to the pipe diagonally
Therefore, the welding strength with small-diameter pipes
By increasing the degree and cutting diagonally
Position the resulting longer part outside the bending stress.
By releasing the stress generated in this part,
The strength of the place can be further increased.

[Brief description of the drawings]

FIG. 1 is a side view showing a connection structure of pipes according to an embodiment of the present invention.

FIG. 2 is a top view showing the coupling structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sub tube 2 Cross pipe 3 Joint pipe 5, 6 Weld

Claims (1)

(57) [Scope of request for utility model registration] An outer diameter substantially equal to a large diameter pipe;
One end of a joint pipe having an inside diameter capable of inserting a small-diameter pipe is cut obliquely, and the end of the small-diameter pipe is inserted into the one end , and the peripheral surface of the small-diameter pipe and
While integrated by welding a cut end surface, the diameter of the concave semicircular formed at the other end of the joint pipe
A T-shaped coupling structure for pipes, characterized in that the pipes are welded integrally by contacting the side surfaces of the pipe.