JPH029193Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fuel tube fixing structure, and particularly to a fuel tube fixing structure in which a connecting portion of the fuel tube is bolted to a fuel pipe.

[Prior Art] As a fuel tube fixing structure, a structure in which a connecting part provided at the tip of the fuel tube is fixed to the fuel pipe using a union bolt is conventionally known. widely used.

FIGS. 2 and 3 show an example of a conventional fuel tube fixing structure disclosed in Japanese Utility Model Application Publication No. 125586/1986.

The connecting portion 12 has a bolt hole 22 as shown in FIG.
It has a shape in which a groove portion 24 is provided between the head portion 12b provided with the crimped portion 12b and the caulking portion 12a. The collar portion 26 is the connecting portion 1
It has a recess 28 corresponding to the groove 24 of No. 2,
The concave portion 28 of the collar portion 26 is fitted into the groove portion 24 of the connecting portion 12 and fixed. When connecting the fuel tubes, as shown in FIG.
2 connects the fuel tubes so that they do not rotate with the tightening torque when fixing them with the union bolts 16.

[Problem to be solved by the invention] However, in the conventional example, the collar portion 26
is simply a flat plate, and has a structure that is simply brought into contact with the tube attachment part. Therefore, there is a problem in that when bolts are tightened, unless the flange portion 26 is assembled in close contact with the mating member, twisting will occur. Another problem was that the distance between the center of the bolt hole 22 and the flange portion 26 was specified, and the flange contact portion of the mating tube attachment portion had to be formed to match this distance.

The present invention was devised in view of the above-mentioned conventional problems, and its purpose is to provide a fixing structure for a fuel tube that can prevent the coupling part from twisting when tightening bolts and can simplify assembly. It is in.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a positioning plate fixed to a connecting part having a connecting pipe connecting fuel tubes, and bolting the connecting part to a rectangular fuel pipe. In the fixing structure of the fuel tube to be fixed, the positioning plate is provided with a pair of engaging pieces that straddle the square fuel pipe and the connecting pipe, and is integrally fixed to the connecting pipe of the connecting part substantially perpendicular to its axial direction. and the pair of engaging pieces provided on the positioning plate fixed to the connecting pipe are in surface contact with a side surface other than the side surface including the mounting seat of the connecting portion provided on one side of the square fuel pipe. It is characterized in that it is possible to engage the connecting pipe to position and restrict the connecting pipe in the same direction as the piping direction of the rectangular fuel pipe.

[Function] When positioning the connecting part connecting the fuel tube to the square fuel pipe, a pair of engaging pieces of the positioning plate fixed to the connecting pipe of the connecting part are connected to the connecting part provided on one side of the square fuel pipe. The connecting pipe can be positioned and regulated in the piping direction of the rectangular fuel pipe by making surface contact with the side surface other than the side surface including the mounting seat surface of the section. In addition, since the pair of engaging pieces of the positioning plate have a structure that straddles the square fuel pipe and the connecting pipe, the connecting part can be slid in the same direction as the square fuel pipe, making positioning easy. It is done. When positioning the fuel tube by extending it in the same direction as the square fuel pipe and fixing the above connection part to the square fuel pipe with a union bolt, the engagement piece that is in surface contact with the side surface of the square fuel pipe should be aligned with the union bolt. It is possible to prevent the connecting portion from twisting due to torque when tightening the bolt, and to fix the connecting portion to the square fuel pipe while holding the fuel tube in the same direction as the square fuel pipe.

[Example] Next, a preferred example of the present invention will be described based on the drawings.

FIG. 1 shows a preferred embodiment of the fuel tube fixing structure according to the present invention. It is bolted to the side surface of a rectangular fuel pipe 14 using a union bolt 16.

Here, the connecting portion 12 is a large diameter connecting pipe 12 connected to the tip of the fuel tube 10.
a, and a fixing ring 12b that is integrally formed at the tip of the connecting pipe 12a and fixes the connecting part 12 itself to the side surface of the square fuel pipe 14 by inserting the union bolt 16 into a bolt insertion hole provided in the center.
A fuel flow path is formed between the fuel tube 10 and the square fuel pipe 14 via a fuel port (not shown) provided on the lower surface of the fixing ring 12b.

Here, bolting of the connecting portion 12 is generally performed after positioning the connecting portion 12 on the square fuel pipe 14 in accordance with the piping structure of the fuel tube 10, and in the embodiment, the connecting pipe 12a of the connecting portion 12 is After positioning the rectangular fuel pipe 14 in the piping direction, the connecting portion 12 is fixed with bolts.

However, even if the connecting portion 12 is positioned before bolting, the bolt 16 rotates and the connecting portion 12 rotates when tightening the bolts, resulting in displacement of the connecting portion 12. .

For this reason, the present invention provides a positioning plate 18 that is integrally fixed to the connecting portion 12 and engages with the square fuel pipe 14 to prevent the connecting portion 12 from rotating in the bolt rotation direction.

In the embodiment, the rectangular fuel pipe 14 has a mounting seat surface for the connecting portion 12 formed on one side 14a thereof, and the connecting portion 12 is stably mounted by this mounting seat surface. Further, the positioning plate 18 is integrally fixed to the connecting pipe 12a of the connecting portion 12, and connects the connecting portion 12 to the rectangular fuel pipe 14.
When positioned above, the pair of engagement pieces 20a, 20b that straddle the square fuel pipe 14 engage the other side surfaces 14b, 14c of the square fuel pipe 14, excluding the mounting surface of the connecting portion 12, so that surface contact is possible. are doing.

By doing so, the connecting portion 12 is installed on the square fuel pipe 14, and at the same time is positioned by the positioning plate 18 so that the connecting pipe 12a is in the same direction as the piping direction of the square fuel pipe 14, Moreover, the engagement between the engaging pieces 20a, 20b of the plate 18 and the side surface of the square fuel pipe 14 reliably prevents the connecting portion 12 from twisting when tightening the bolt, thereby preventing the connecting portion 12 from shifting. becomes possible.

Therefore, according to the present invention, displacement of the connecting portion 12 during bolt tightening can be effectively prevented, and even when a flexible plastic fuel tube is used, damage to the tube can be effectively prevented. becomes possible.

Also, when tightening the bolts, the positioning plate 18
The square fuel pipe 14 has a structure that resists bending deformation due to concentrated loads even if lateral loads are applied thereto, and furthermore, it has the advantage of being easy to manufacture and assemble.

[Effect of the invention] As explained above, the positioning plate is fixed to the connecting portion of the fuel tube, the positioning plate is provided with a pair of engagement pieces that straddle the square fuel pipe, and the engagement piece is square-shaped. By making surface contact possible along the side of the fuel pipe, when fixing the connection part of the fuel tube to the square fuel pipe, it effectively prevents the connection part from twisting around due to the rotation of the bolt. It becomes possible to prevent the positional displacement of the connecting portion on the top, and the assembly can be easily performed.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a preferred embodiment of a fuel tube fixing structure according to the present invention, and FIGS. 2 and 3 are configuration diagrams of a conventional fuel tube fixing structure. 10...Fuel tube, 12...Connection part, 14
...Square fuel pipe, 16...Bolt, 18...
positioning plate.

Claims (1)

[Scope of utility model registration request] A fuel tube fixing structure includes a positioning plate fixed to a connecting part having a connecting pipe that connects the fuel tube, and the connecting part is bolted to a square fuel pipe, wherein the positioning plate is attached to the square fuel pipe and the connecting pipe. a positioning plate that is integrally fixed to the connecting pipe of the connecting portion substantially perpendicular to the axial direction of the connecting pipe; is engaged with a side surface other than the side surface including the mounting seat of the connecting portion provided on one side of the square fuel pipe so as to be able to make surface contact with each other so as to connect the connecting pipe in the piping direction of the square fuel pipe. A fuel tube fixed structure characterized by regulating positioning in the same direction as the fuel tube.