JP2570843Y2 - Header fitting - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a header having a plurality of branch pipes protruding at right angles to the axis of the main pipe on the outer surface of the main pipe, and having a wrench corner on the outer periphery of the branch pipe.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
A hexagonal portion 21 is provided on the outer periphery of an end portion where three branch pipes 20 are branched from the main pipe 11 of FIG. The hexagonal portion 21 is used to fix the header 10 with the wrench 3 when connecting a joint or the like to the connection port 22 of the branch pipe 20.
One pair of diagonals 23 and 24 was in the axial direction of the main pipe 11, and was a regular hexagon or regular octagon.

[0003]

The hexagonal portion 2 of the above branch pipe
When the spanner 3 is to be hung on 1, the main pipe 11 is
The span of the wrench 3 is inclined with respect to the axis of the wrench, and the shoulder 31 of the wrench 3 is located in the adjacent branch pipe. It was necessary to increase the distance from the tube 20.

[0004] For this reason, in the case of headers having the same number of branch pipes, the overall size becomes large and handling becomes difficult. SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and can reduce the pitch interval between branch pipes provided in a header and provide a compact header joint.

[0005]

This invention aspect SUMMARY OF THE INVENTION are provided a main pipe and a plurality of branch pipes protruding in the axial direction perpendicular to the axial direction outer surface of the main pipe from the main pipe integrally, outer surface of the branch pipe In a header having a wrench corner portion, the corner portion is hexagonal, and a pair of opposing corners of the hexagon are provided in the axial direction of the main pipe, and the inner angle of the pair of corners in the axial direction is provided. At 145 to 170 degrees respectively , facing each other
A header joint comprising a pair of mating pieces provided in an axial direction of a main pipe .

[0006]

According to the present invention having the above-described structure, the spanner is set in a direction substantially perpendicular to the axis of the main pipe. For this reason, since the shoulder of the spanner does not reach the position of the adjacent branch pipe, the pitch interval between the branch pipes can be reduced. The inner angle of the angle at this axial position is 14 due to the relationship with the shoulder of the spanner.
5 degrees or more is appropriate . Also from the manufacturing aspect, integrally cast, etc.
When the header is formed, the angle is preferably 170 degrees or less, which is smaller than 180 degrees, in consideration of the draft angle when the parting surface of the mold is provided in the axial direction. In addition, a pair of
Since the piece is provided in the axial direction of the main pipe, the angle of this branch pipe is
The part does not protrude greatly to the side of the main pipe. Therefore, the whole
Compact and easy to handle.

[0007]

1 to 3 show an embodiment of the present invention.
FIG. 1 shows a state in which a spanner 3 is hung on the corner of the branch pipe. The header joint 4 is composed of a main pipe 41 and three branch pipes 51, 52, 5, which are arranged in a line in the axial direction of the main pipe 41 and project outward.
3, the inside of which is a conduit through which a fluid passes, and each end is provided with a connection port which can be connected to a joint or the like.
A hexagonal portion 55 for wrench mounting is provided on the outer surface of the connection port 54 at the end of each of the branch pipes 51, 52, 53. The hexagonal portion 55 is used for fixing when connecting a joint.

The hexagonal portion 55 is not a regular hexagon, and the interior angle of a portion corresponding to the axial direction of the main pipe 41 is set to 160 degrees. When the wrench 3 is hung on the hexagonal portion 55 as shown in FIG. 1, the wrench 3 is inserted substantially perpendicularly to the axis. Therefore, the shoulder 31 of the spanner 3 does not reach the adjacent branch pipe, and the pitch interval between the branch pipes can be reduced to a position where the spanner 3 does not hit.

Therefore, if the number of branch pipes is the same, the total length of the header can be reduced as compared with the conventional case. This leads to a reduction in weight and facilitates handling. In the present embodiment, the corners of the branch pipe are described as hexagonal, but the same applies to octagons.

[0010]

As described above, the header joint of the present invention has a short overall length, is compact, and is easy to handle.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a spanner is hung on a branch pipe according to an embodiment of the present invention.

FIG. 2 is a diagram showing a front view of FIG. 1;

FIG. 3 is a plan view of a branch pipe connection port shown in FIG. 2;

FIG. 4 is a plan view showing a state where a spanner is hung on a branch pipe of a conventional example.

Claims (1)

(57) [Scope of request for utility model registration] 1. A setting main and, a plurality of branch pipes protruding in the axial direction perpendicular from the main pipe in the axial direction outer surface <br/> of the main pipe integrally
Only, the header having a corner portion of the wrench hanging outside surface of the branch pipe, the corner portion is hexagonal, a pair of said axis directions provided with a pair of corners facing each other of the hexagon in the axial direction of the main pipe
It of no respectively 145 degrees internal angle of the corner and 170 degrees, each other
A header joint comprising a pair of opposed pieces provided in an axial direction of a main pipe .