JPH0517419Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to the wiring structure of a fuel injector in an automobile engine.

(Prior art) Conventionally, this type of wiring structure was
A fixture 40 disclosed in Japanese Patent No. 60-138318 was used. That is, this fixture 40 is the twelfth
As shown in the figure, a locking part 41 of a bracket 45 is provided in the middle, and attachment parts 4 of a wire harness W are provided on both sides.
2 and integrally formed with a band 43 and a band clip 44 for tightening the wire harness W on both sides of the attachment part 42, respectively.
For example, use the flange part of the intake manifold to attach the brackets 45 to multiple locations using the
was attached to connect the branch line W1 of the wire harness W to the fuel injector.

(Problem to be Solved) However, in the conventional configuration described above, the influence of vibration is dealt with by firmly tightening the locking part 41 and the band 43, but this fixing tool 4
0, it is necessary to set multiple brackets 45 at required locations, which takes time and effort, and depending on the setting position, the connection length between the branch line W1 and the injector becomes long, making it unstable to hold the branch line W1. This caused problems such as interference with other parts and disconnection of wires.

The present invention was made to solve the above-mentioned conventional problems, and by combining the fuel delivery pipe and the protector, the connection position between the branch line and the fuel injector can be adjusted without providing any special locking means. It is an object of the present invention to provide a wiring structure for a fuel injector that can be set short, easily and reliably fixes a wire harness while dealing with vibrations.

(Means for solving the problem) The gist of the present invention to achieve the above object is a wiring structure that connects branch lines of a wire harness to multiple injectors set in a fuel delivery pipe attached to an engine. The delivery pipe is formed into a substantially warhead-shaped cross section with an R surface of a predetermined diameter on the upper part and tapered side surfaces on the left and right sides,
Cut recesses are formed at predetermined intervals on the one side surface, and a protector made of synthetic resin or the like that is elastically secured to the delivery pipe in a crown-like manner connects the locking portion and the harness holding portion through a thin wall portion. The locking portion is connected in an S-shape, and the locking portion is formed with a folded groove on one edge of a substantially semicircular attachment portion along the R surface of the delivery pipe, and is engaged with the groove at a predetermined interval. A stop hole is provided, a thin wall portion is formed on the other edge, and a plurality of locking legs are vertically provided on both edges of the attachment portion to abut and engage with the notch recess formed in the delivery pipe and the side surface. The harness holding portion is formed to have a substantially U-shaped cross section, one edge is connected to the thin wall portion, and the other edge is provided with a branch port of a branch line of the wire harness and the locking hole. Engageable locking pieces are provided at predetermined intervals, and this harness holding part is rotatably locked to the upper part of the mounting part through the thin wall part, so that the harness holding part is rotatably locked between the mounting part and the harness gripping part. The present invention resides in a wiring structure of a fuel injector configured to form a substantially crescent-shaped storage space for a wire harness.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings. In the figure, 2 is a fuel delivery pipe attached to the engine 1, and the pipe 2 has a predetermined diameter radius at the top. It is formed by a surface 3, and both side surfaces 4 are tapered at a predetermined angle,
The bottom portion 5 is formed into a planar shape and has a cross section approximately shaped like a warhead. Additionally, a mounting portion 6 is provided on one side 4.
A plurality of cut recesses 7 (in this example, three places are provided) are formed on the other side surface 4 at predetermined intervals, and a plurality of cut recesses 7 (in this example, three places are provided) are formed on the delivery pipe 2 at predetermined intervals. Injectors 31 (injectors 31 are provided at three locations) are set.

Next, a description will be given of the protector 8 that elastically attaches to the delivery pipe 2 and arranges the wire harness W. This protector 8 is made of synthetic resin or the like, and the locking part 9 and the harness holding part 21 are thin-walled parts. 20, and is formed into a substantially S-shape. This locking portion 9 is elastically secured to the delivery pipe 2 in a crown-like manner, and one edge 11 of the approximately semicircular attachment portion 10 along the R surface 3 of the delivery pipe 2 is bent into a folded shape. A groove portion 12 is formed, and the groove portion 1
Locking holes 13a, 13b, 13c having locking protrusions 14 are formed at predetermined intervals in the groove portion 12.
On the lower surface side, locking legs 15a, 15b, and 15c having locking claws 16 that engage and come into contact with notch recesses 7 formed in the side surface 4 of the delivery pipe 2 are vertically provided downwardly and inwardly at a predetermined angle. There is. Further, a locking leg 18a having a locking claw 19 that abuts and engages with the other side surface 4 of the delivery pipe 2 on the other edge 17 side;
18b and 18c are vertically disposed downward and inward at a predetermined angle. A harness holding portion 21 is rotatably connected to the edge 17 side of the locking portion 9 formed in this manner via thin wall portions 20a, 20b, and 20c.

This harness holding part 21 is formed to have a substantially U-shaped cross section, and one edge 22 of the holding part 21 has a connecting piece 23 connected to the thin parts 20a, 20b, and 20c.
a, 23b, 23c, and the harness holding part 21 is rotatably provided to the upper side of the attachment part 10 of the locking part 9 via the thin parts 20a, 20b, 20c, and the other edge Branch ports 25a, 25b, 25c from which branch lines W1 of the wire harness W are drawn out at predetermined intervals are provided at predetermined locations of the portion 24 (in this example, three locations are provided corresponding to the injectors 30).
are formed, and the same recesses 25a, 25b,
Locking pieces 26a, 26b, 26 having locking claws 27 inserted into locking holes 13a, 13b, 13c formed in the groove 12 of the mounting portion 10 adjacent to 25c;
cProtrusions are formed. In addition, the harness holding part 2
Groove-shaped fixing portions 28 and 29 are integrally formed at both ends of the wire harness W to which the wire harness W can be wound and fixed using a tape T or the like. The thus formed harness holding portion 21 of the protector 8 is attached to the thin wall portions 20a, 2.
0b, 20c to the upper side of the mounting portion 10, and the locking pieces 26a, 26b, 26c are fitted into the locking hole 13.
When inserted and engaged with a, 13b, 13c, the mounting portion 1
A storage space 30 for a wire harness W having a substantially crescent-shaped cross section is formed between the wire harness W and the harness holding portion.

Next, the operation and effects of this embodiment configured as described above will be explained.

Now, in this embodiment, a branch line W1 of a wire harness W is connected to a plurality of injectors 30 set in a fuel delivery pipe 2 attached to an engine 1.
The wiring structure connects the delivery pipe 2.
The delivery pipe 2 is formed into a warhead shape in cross section with an R surface 3 of a predetermined diameter on the upper part and tapered side surfaces 4 on the left and right sides, and cut recesses 7 are formed at predetermined intervals on one side surface 4. A protector 8 made of synthetic resin or the like that is elastically secured in a crown shape connects a locking portion 9 and a harness holding portion 21 to thin-walled portions 20a, 20b, 20.
c, and the locking part 9 is connected to a groove part 12 in a folded shape on one edge 11 of a substantially semicircular mounting part 10 along the R surface 3 of the delivery pipe 2.
and locking holes 13 are formed in the groove 12 at predetermined intervals.
a, 13b, and 13c are provided, thin wall portions 20a, 20b, and 20c are formed on the other edge 17, and a cut recess 7 and a side surface of the delivery pipe 2 are formed on both edges 11 and 17 of the attachment portion 10. A plurality of locking legs 15a, 15b, 15c, 18 that abut and engage with 4.
a, 18b, 18c are installed vertically, and the harness holding part 2
1 is formed into a substantially U-shaped cross section, and one edge 22
are connected to the thin-walled parts 20a, 20b, 20c, and the branch line W of the wire harness W is connected to the other edge 24.
1 branch ports 25a, 25b, 25c and the locking hole 13
A locking piece 26a that can be engaged with a, 13b, 13c,
26b, 26c are provided at a predetermined interval, and the harness holding portion 21 is connected to the thin wall portions 20a, 20b, 20c.
By being rotatably locked to the upper part of the attachment part 10 via the holder, a substantially crescent-shaped storage space 29 for the wire harness W is formed between the attachment part 10 and the harness gripping part 21. Therefore, first, a plurality of electric wires W2 are stored in the harness holding part 21 of the protector 8 in advance, and the branch wires W1 are inserted through the branch ports 25a, 25b, and 25c provided on one edge 24 of the harness holding part 21. When all the electric wires W2 have been pulled out and all the wires W2 have been stored, the thin section 20
a, 20b, 20c, and the edge 2
The locking holes 13a, 13 formed in the edge 11 of the locking portion 9 include the locking pieces 26a, 26b, 26c formed in the
b, 13c and are pressed together to engage each other, and the harness holding part 21 and the locking part 9 are combined, and the wire harness W has a substantially crescent-shaped cross section formed by both parts 21, 9. The wire harness W stored in the storage space 29 and extending from the protector 9 to both ends is attached to the harness holding part 2
Tape T is attached to the fixing parts 28 and 29 formed on both ends of 1.
It can be securely attached by wrapping it around it. After that, the locking leg 15 is inserted from above the delivery pipe 2.
By aligning a, 15b, and 15c with the cut recesses 7 formed in the pipe 2 and pressing the protector 8, the protector 8 can be elastically engaged with the delivery pipe 2.
Then, wiring is completed by connecting each branch line W1 to the injector 31.

As described above, according to this example, since the semicircular mounting portion 10 is fitted into the harness holding portion 21 in a substantially fitting manner, each electric wire W2 of the wire harness W within the holding portion 21 is inserted into the mounting portion. 10, and by providing the branch ports 25a, 25b, 25c on the edge 24 of the harness holding portion 21, the branch ports 25a, 2
Each branch line W1 derived from 5b and 25c is necessarily directed downward, which makes it easy to attach to the injector 31 provided on the lower side of the delivery pipe 2, and does not require extra length. It is possible to connect to the injector 31 with a minimum length without causing any damage, and the influence of vibration can be prevented. In addition, since the wiring harness W is stored in the storage space 30 having a substantially crescent-shaped cross section along the R surface 3 of the delivery pipe 2, it requires less installation space and is not bulky, and the influence of load due to vibration is significantly reduced, making it reliable. Can be fixed.
In addition, lateral displacement can be prevented because the locking legs are elastically engaged with the cut recesses 7 of the delivery pipe 2 in a fitted manner. Thereby, there are many advantages such as being able to prevent short-circuit accidents of the wire harness W and generation of abnormal noises.

In the above embodiment, the protector 8 is fixed to the delivery pipe 2, but the locking leg 1
Providing other locking means on the lower surface of the mounting portion 10 instead of 5 and 18 is effective for arranging the general branch line W1.

(Effect of the invention) The present invention is a wiring structure in which branch lines of a wire harness are connected to a plurality of injectors set on a fuel delivery pipe attached to an engine, and the delivery pipe has a predetermined diameter at the top. A synthetic resin or the like is formed into a generally warhead-shaped cross section with an R surface and tapered side surfaces on the left and right sides, cut recesses are formed at predetermined intervals on one side surface, and the synthetic resin or the like is elastically attached to the delivery pipe in a crown-like manner. In the protector, a locking part and a harness holding part are connected in a substantially S-shape through a thin wall part, and the locking part is connected to one edge of a substantially semicircular mounting part along the R surface of the delivery pipe. A folded groove is formed in the part, and locking holes are provided at predetermined intervals in the groove, and a thin part is formed in the other edge, and recesses are formed in the delivery pipe at both edges of the mounting part. The harness holding part has a substantially U-shaped cross section, and one edge is connected to the thin wall part and the other edge is connected to the thin wall part. A locking piece that can engage the branch port of the branch line of the wire harness and the locking hole is provided at a predetermined interval on the edge, and the harness holding portion is attached to the upper part of the mounting portion through the thin wall portion. By rotating and locking the wiring harness to form a substantially crescent-shaped storage space for the wire harness between the mounting part and the harness holding part, the semicircular mounting part almost fits into the harness holding part. Since the wires W2 of the wire harness in the holding part fit tightly together in the mounting part, the branch openings are provided at the edge of the harness holding part so that they can fit together with the semicircular mounting part. Each branch line led out from the branch port is necessarily directed downward, which facilitates attachment to the injector provided on the lower side of the delivery pipe, and requires extra length. It can be connected to the injector with a minimum length without any vibration, and can prevent the effects of vibration. In addition, since the wiring harness is stored in a storage space with a nearly crescent-shaped cross section along the R surface of the delivery pipe, it requires less installation space and is not bulky, and the influence of vibration loads is significantly reduced, making it possible to securely fix the wire harness. can. In addition, lateral displacement can be prevented because the locking legs are elastically engaged with the cut recesses of the delivery pipe. This makes it possible to prevent short-circuit accidents and abnormal noises in the wire harness, making it an extremely practical idea for the wiring structure of a fuel injector.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a partial perspective view of the engine room, Fig. 2 is a protector,
An exploded perspective view of the wire harness and fuel injector; Figure 3 is a sectional view of the protector, wire harness, and fuel injector assembled;
Fig. 4 is a perspective view of the delivery pipe, Fig. 5 is a plan view, Fig. 6 is a perspective view of the protector, Fig. 7 is an expanded plan view of the protector, Fig. 8 is a side view, and Fig. 9 is a plan view of the delivery pipe. Figure 7 - line sectional view, 1st
Figure 0 is a - line sectional view of Figure 7, Figure 11 is a cross-sectional view of Figure 7.
The cross-sectional view taken along the line ``-'' in FIG. 12 is a conventional example. 1...Engine, 2...Delivery pipe, 3...
... R surface, 4 ... Side surface, 7 ... Notch recess, 8 ...
Protector, 9...Locking part, 10...Mounting part, 1
1, 17, 22, 24... edge, 12... groove,
13a, 13b, 13c...Locking hole, 15a, 1
5b, 15c, 18a, 18b, 18c...locking leg, 20a, 20b, 20c...thin wall portion, 21...
...Harness holding part, 25a, 25b, 25c...
Branch port, 26a, 26b, 26c...Locking piece, 3
0...Storage space, 31...Injector, W
...Wire harness, W1...branch line.

Claims (1)

[Scope of utility model registration request] The wiring structure connects branch lines of a wire harness to a plurality of injectors set on a fuel delivery pipe attached to an engine, and the delivery pipe has an R surface of a predetermined diameter on the upper part and tapered side surfaces on the left and right. The protector, which is made of synthetic resin or the like and is elastically secured to the delivery pipe, has a locking portion and a harness holding portion. The locking portion is connected to the delivery pipe in a substantially S-shape through a thin wall portion, and the locking portion has a folded groove formed on one edge of a substantially semicircular attachment portion along the R surface of the delivery pipe. locking holes are provided at predetermined intervals in the same groove portion, and a thin wall portion is formed on the other edge to abut and engage the notch recesses and side surfaces of the delivery pipe at both edges of the mounting portion. The harness holding part has a substantially U-shaped cross section, one edge is connected to the thin wall part, and the other edge is connected to a branch line of the wire harness. A branch port and a locking piece that can be engaged with the locking hole are provided at a predetermined interval, and this harness holding part is rotatably locked to the upper part of the mounting part via the thin wall part. A wiring structure for an injector, characterized in that a substantially crescent-shaped storage space for the wire harness is formed between the wire harness and the harness gripping portion.