JPH0310574Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a two-part grommet for maintaining and fixing the cord of an electrical device mounted on a vehicle such as an automobile in a proper position on the vehicle body.

<Prior Art> Conventionally, when maintaining a cord connecting electrical equipment mounted on a car by passing it through a hole provided in a suitable position in the car body, a bellows-shaped elastic member 1 as shown in FIG. 5 is used. ing. The illustrated example is an elastic member 1 that connects a vehicle body and a door, and is made of rubber or the like, and has a wire harness 2 penetrating therein and maintained therein. In this type of elastic member 1, grooves 4, 4 formed in the end portions 3, 3 are fitted into holes (not shown) provided in a vehicle body or a door. Normally, this fitting work involves fixing the tongue pieces 5, 5 provided on the elastic member 1 by wrapping tape 6 around the wire harness 2.
This is done by pulling the wire harness 2 through a hole provided in the vehicle body or door.

Also, as a two-part grommet,
The structure disclosed in Japanese Patent No. 25115 is known.

<Problems to be solved by the invention> In the conventional example shown in Fig. 5, it is necessary to wrap the tape and pull it inside the parts to be fixed such as the car body and doors, especially in narrow spaces such as inside the doors. There are problems such as the fact that tensioning work is extremely difficult within the space.

Further, in the structure disclosed in the above-mentioned publication, a combination of protrusions and recesses is used to connect the divided grommet portions. Normally, forces are applied to this type of grommet from various directions, front, back, left, and right via a wire harness. For example, in a wire harness that connects an automobile body and a door, a force in a bending direction is applied from an elastic portion surrounding the wire harness. This external force acts as a force to open the divided portions of the grommets, that is, the joints, and when the bonding force between the divided grommets is weak as in the above structure, the grommets are divided and separated.
There is a risk that complete waterproofing may not be achieved. Further, since the bonding site is only one on each bonding surface and the bonding force is insufficient, the tip portion may be open when assembled to the fixed part, making the assembly work difficult.

This invention was developed to solve these problems, and eliminates the need for troublesome work such as wrapping with tape.
Moreover, the present invention provides a grommet that can be easily installed even in a narrow space.

Further, the present invention provides a grommet having a structure strong against external forces by making the connecting portion of the two-part grommet reliable and strong.

<Means for Solving the Problems> The present invention has a flange portion on its lower surface that fits into the end of an elastic member that maintains the wire harness passing through, and a through hole through which the wire harness passes through the flange portion approximately in the center of the flange portion. In a grommet that can be divided into a pair of frames, the grommet has an engagement piece on its upper surface that engages with a hole drilled in a fixed part such as a vehicle body, and the grommet is divided into a pair of frames. and a guide pin formed protruding from another joint part of the other frame body that is not opposite to the one joint part, and a joint part of the frame body that faces the joint part where the guide pin is formed. a guide hole drilled in each of the frames and into which the guide pin fits when the pair of frames are coupled; and an engaging claw formed on the upper and lower surfaces of the frame at the joint portion of the two where the guide pins are formed. and an engagement hole formed on the upper and lower surfaces of the two joints in which the guide hole is formed, respectively, and into which the engagement claw engages when the pair of frames are coupled. It is.

<Operation> When the joining position of the pair of frames is determined through the guide hole and the guide pin and they are both pressed in the joining direction, guide pins are formed on the upper and lower surfaces of the two frames at the joint portion, respectively. The two frames are firmly connected at their upper and lower surfaces.

Since the two frames are connected by engaging claws and engaging holes, even if an external force is applied in the dividing direction,
The two frames are never split.

Furthermore, even if a bending force is applied to the two frames, since they are engaged and connected at two joints on both the upper and lower surfaces of the frames, the grommets may be bent or the joints may be There is no risk of it opening.

<Example> In FIGS. 1 and 2, 7 is a pair of frames 8
Grommet consisting of a, 8b, polyethylene,
Composed of resins such as polypropylene and polyacetal. 9 is a through hole through which the wire harness passes; 1
0 is a collar portion that fits into the elastic member, 11, 11...
is an engagement piece that engages with a fixed part such as a vehicle body or a door. Reference numeral 12 denotes a guide pin formed protrudingly from the joint of the frame 8a, and reference numeral 13 denotes a guide hole bored at the joint of the other frame 8b. Similar guide holes 14 and 15 are formed in the other joint portion of the frames 8a and 8b, respectively, with their arrangement reversed. 16 and 17 are engagement holes formed protrudingly on the upper surfaces of the frames 8a and 8b facing the joints; 18 and 19 are engagement claws formed on the upper surfaces of the opposing frames 8a and 8b, respectively; 20 , 21 are engagement holes formed protruding from the lower surfaces of the frames 8a and 8b facing the joint, and 22 are engagement claws formed on the lower surfaces of the opposing frames 8b. A similar engagement pawl is also provided on the lower surface of the frame body 8a (not shown). Here, the engagement holes 16 and 20 are
The arrangement is determined so that the guide hole 14 is formed at the joint where the guide hole 14 is formed. In this way, the guide holes 14 and 13 are formed between the engagement holes 16, 20 and 17, 21 on the upper and lower surfaces which protrude at the two joints of the frames 8a and 8b, respectively, and the structure is divided into two parts. By reversing the joints at the joints, a structure can be made that is strong against external forces such as bending forces applied from various directions. The engagement hole 20 provided on the lower surface of the frame 8a is formed on the same plane as the lower surface, and therefore the corresponding engagement claw 22 of the other frame 8b is formed in the groove formed on the lower surface of the frame 8b. 23. As a result, the frame 8a,
When the grommet 8b is joined, the lower surface of the grommet 7 becomes one plane.

3 and 4 show the mounting structure of the bellows-like elastic member 1 and a fixed part, for example, a vehicle body 24, and the grommet 7, in which the frames 8a and 8b are sandwiched and joined by the wire harness 2, is also connected to the wire harness 2. The end portion 25 of the elastic member 1 made of rubber is fitted through the end portion 2 of the elastic member 1 . A groove 26 is formed inside the end 25 of the elastic member 1, and the collar 10 of the grommet 7 fits into this groove 26. In this state, the end portion 25 of the elastic member is grasped and the grommet 7 portion is pushed into the hole 26 formed in the vehicle body 24. In this way, the engaging pieces 11, 11... provided on the grommet 7 pass through the hole 26 and engage with the hole 26 with a click feeling, and the vehicle body 24 is moved by the engaging pieces 11, 11... and the ends of the elastic member. 25. Thereby, the grommet 7 and the elastic member 1 are fixed to the vehicle body 24.

<Effect of the invention> Since the wire harness is usually quite long, it is more convenient to make the grommet a two-part structure. The present invention adopts such a two-part structure, and at the same time, the pair of frames constituting the grommet are engaged and fixed on both the upper and lower surfaces of the grommet, so that the fixing force is strong. I can do it. In other words, when a two-part structure is normally adopted, it is often engaged and fixed at one place on one joint surface (usually there are two joints, so there are two joints), but with this type of grommet, the elastic member side The grommet is pushed into a hole in a vehicle body, etc. by grasping the grommet. At this time, the upper surface of the grommet opens outward due to the gripping force, which may make it difficult to fit into the hole.
In contrast, in the present invention, an engaging hole and an engaging claw are provided on the upper surface of the grommet to firmly fix the pair of frames, thereby preventing the above-mentioned opening phenomenon.
As a result, the grommet can be fitted into a hole in a vehicle body or the like with a small amount of force, and this structure is particularly effective when employed inside a door with a narrow working space.

Further, according to the present invention, a depressed guide hole is formed between the engagement holes on the upper and lower surfaces that protrude at the two joint parts of the frame body, and the configuration is reversed at the two joint parts. It is possible to maintain a strong structure against external forces such as bending force, tensile force, and twisting force applied from various directions.

[Brief explanation of the drawing]

Figure 1 is a perspective view of an embodiment of the present invention, Figure 2 is a
FIG. 3 is a perspective view showing the main part of the bottom surface of the grommet, FIG. 3 is a perspective view showing the grommet attached to the elastic member, FIG. 4 is a partial sectional view showing the grommet attached to the fixed part, and FIG. 5 is a perspective view showing the grommet attached to the elastic member. , is a perspective view of a conventional example. 1...Elastic member, 2...Wire harness, 5...
... tongue piece, 6 ... tape, 7 ... grommet, 8
a, 8b...frame body, 9...through hole, 10...flange part,
11, 11... Engaging piece, 13, 14... Guide hole, 12, 15... Guide pin, 16, 17, 2
0, 21...Engagement hole, 18, 19, 22...Engagement pawl, 24...Vehicle body.

Claims (1)

[Scope of utility model registration request] It has a flange on its lower surface that fits into the end of an elastic member that maintains the wire harness passing through it, and has a through hole approximately in the center through which the wire harness passes, and a hole drilled in a fixed part such as the vehicle body. In a grommet that can be divided into a pair of frames and has an engagement piece on its upper surface that engages with the frame, one joint of the one frame and the one joint of the other frame. guide pins protrudingly formed on other joints that do not face each other, and drilled in the joints of the frame opposite to the joint on which the guide pins are formed, when the pair of frames are joined; A guide hole into which the guide pin fits, an engaging pawl formed on the upper and lower surfaces of the frame of the two joints where the guide pin is formed, and a joint between the two joints where the guide hole is formed. A two-part grommet comprising engagement holes formed on the upper and lower surfaces of the frame bodies, respectively, into which the engagement claw engages when the pair of frame bodies are coupled.