JP2003023720A - High waterproof grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high waterproof grommet having high workability in mounting it on a vehicle body panel, while ensuring high waterproofing compatible with water pressure. SOLUTION: This highly waterproof grommet 40 includes a grommet body 41, made of an elastic material mounted on a through hole 63, an outer member 51 which has rail members 56 and 56 on a sidewall 53 and presses the grommet body 41 to a mounted panel P at mounting, and hooks 61 and 61 to lock the rail members 56 and 56 close to the through-hole 63 on the mounted panel P. The rail members 56 and 56 are provided in taper shapes. The outer member 51 is provided with knobs 57 and 57 for installation. The grommet body 41 is provided with a locking rib 44 for locking the outer member 51. The grommet body 41 is fixed to the through-hole 63 by rotating the outer member 51, to lock the rail members 56 and 56 to the hooks 61 and 61.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a highly waterproof grommet for securing a high waterproof property in a through hole of a vehicle body panel by attaching a wire harness used in a vehicle such as an automobile to the vehicle body panel.

[0002]

2. Description of the Related Art As a conventional highly waterproof grommet, FIG.
As shown in FIG. 6, bolts are inserted into the insertion holes of the elastic grommet and the bracket, and the panel is provided with a through hole through which the wire harness is inserted and fixed by bolting.

As shown in FIG. 5, the grommet 1 is composed of a grommet body 2 and a bracket 10 fitted on the grommet body 2. Grommet body 2
Is made of a rubber material, and has a tubular portion 3 for inserting and holding the wire harness W, and a flange portion 4 for panel joining formed integrally with the tubular portion 3. The flange portion 4 is formed with a pair of insertion holes 5 and 5 through which the bolts 31 (see FIG. 6) are inserted at positions facing each other with the cylinder portion 3 as the center.

The bracket 10 is made of a metal or a resin material, and is divided into two to be composed of bracket halves 11 and 21. The bracket half body 11 is composed of a housing portion 12 which is slightly larger than the flange portion 4 and in which the flange portion 4 is housed, and a half cylinder portion 13 which covers a half circumference of the cylinder portion 3. At the positions facing the semi-cylindrical portion 13 of the accommodating portion 12, insertion holes 14,
14 is formed. Also, the bracket half 21 is
The bracket half 11 includes an accommodation portion 22 that is slightly smaller than the accommodation portion 12, and a half tubular portion 23 that covers a half circumference of the tubular portion 3. At the position facing the semi-cylindrical portion 23 of the housing portion 22,
The insertion holes 24, 24 are formed.

Next, a procedure for fixing the grommet 1 to the panel P using the bracket 10 will be described. First, the flange portion 4 of the grommet body 2 is housed in the housing portion 22 of the bracket half body 21, and the half circumference of the tubular portion 3 is covered with the half tubular portion 23. Next, the bracket half 2 containing the flange 4
The accommodating portion 12 of the bracket half body 11 is mounted from the outside of the accommodating portion 22 of No. 1, and the remaining half circumferential portion of the tubular portion 3 is covered with the half tubular portion 13. Thereafter, as shown in FIG. 6, the grommet 1 is joined to a mounting position of the panel P where a through hole (not shown) is provided, and the insertion holes 5, 24, 14 (see FIG. 5).
The grommet 1 is fixed to the panel P by screwing the nut 32 into the bolt 31 that has been inserted through and tightening.
As a result, the wire harness W that has been inserted through the tubular portion 3 is inserted into the panel P while being waterproof, and is routed to a predetermined location.

[0006]

By the way, when fixing the grommet 1 to the panel P as described above, the grommet 1
Is fixed to the panel P while being pressed by the bolt 31 and the nut 32. Thereby, the waterproof property of the grommet 1 can be secured, but the bolt 31 is inserted into the insertion hole 5,
Since it is necessary to insert the nut 32 into the screws 24 and 14 and further screw the nut 32 therein, there is a problem that improvement in workability at the time of mounting is hindered.

An object of the present invention is to solve the above-mentioned problems, and to provide a highly waterproof grommet having a good workability for mounting on a vehicle body panel while ensuring a high waterproof property capable of coping with high water pressure. Especially.

[0008]

A highly waterproof grommet according to claim 1 of the present invention for achieving the above object is mounted in a through hole formed in a mounting panel and seals between the mounting panel and the mounting panel. A grommet for waterproofing, which is formed of an elastic material and is attached to the through hole, and an outer member that includes a rail member on a side wall and presses the grommet body against the attachment panel at the time of attachment, An engaging portion for engaging the rail member is provided in the vicinity of the through hole of the mounting panel, and the outer member is rotated to engage the rail member with the engaging portion. Is fixed to the through hole.

According to the highly waterproof grommet having the above structure, by rotating the outer member from above the grommet main body and engaging the rail member with the engaging portion, the grommet main body is applied with a strong pressing force in the vicinity of the through hole of the mounting panel. Since they are in contact with each other, high waterproofness can be secured by a simple mounting operation.

A high waterproof grommet according to claim 2 of the present invention for achieving the above object is the high waterproof grommet according to claim 1, wherein the rail member is provided in a tapered shape. Is characterized by.

According to the highly waterproof grommet having the above structure, since the outer rail member is rotated to engage the tapered rail member with the engaging portion, the pressing force acting on the rail member from the engaging portion is rotated. Can be increased with As a result, the grommet body can be brought into contact with the vicinity of the through hole of the mounting panel with a stronger pressing force.

Further, a highly waterproof grommet according to claim 3 of the present invention for achieving the above-mentioned object is provided by claim 1 or 2.
The highly waterproof grommet according to [4], characterized in that a projection is provided at an end of the rail member.

According to the highly waterproof grommet having the above structure, when the outer member is rotated to engage the rail member with the engaging portion, the protrusion provided at the end of the rail member engages with the engaging portion. Accordingly, it is possible to prevent the outer member from being carelessly rotated in the reverse direction and the rail member and the engaging portion from being disengaged. Therefore, high waterproofness of the grommet can be stably ensured.

Further, the high waterproof grommet according to claim 4 of the present invention for achieving the above object is the high waterproof grommet according to claim 1, wherein the outer member is provided with a knob for mounting. It is characterized by

According to the highly waterproof grommet having the above-mentioned structure, since the outer member has the knob for mounting, the outer member is rotated by the knob when the grommet is attached so that the rail member can be easily engaged with the engaging portion. Can be combined. Therefore, the work of attaching the grommet to the vehicle body panel becomes easy.

A high waterproof grommet according to claim 5 of the present invention for achieving the above object is the high waterproof grommet according to claim 1, wherein the grommet body locks the outer member. It is characterized in that it is provided with a locking portion for.

According to the highly waterproof grommet having the above-mentioned structure, the outer member can be locked to the locking portion of the grommet body, so that the outer member and the grommet body can be handled as one body, and the grommet can be attached to the vehicle body panel. Work becomes easy.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a highly waterproof grommet according to the present invention will be described below with reference to FIGS. Figure 1
2 is an exploded perspective view showing an embodiment of the highly waterproof grommet of the present invention, FIG. 2 is a perspective view showing a state in which the grommet is attached to the attachment panel in FIG. 1, and FIG. 3 is XX in FIG.
FIG. 4 is a vertical cross-sectional view taken along a line, and FIG. 4 is an exploded perspective view showing a modified example of the embodiment shown in FIG.

As shown in FIG. 1, the highly waterproof grommet 40 of this embodiment includes a grommet main body 41, an outer member 51, and two hooks 61, 61 which are engaging portions projecting from the mounting panel P. It is configured.

The grommet body 41 is made of a rubber material,
Wire harness insertion hole 45 for inserting the wire harness W
And a flange portion 43 having a substantially circular cross-sectional shape, which is provided for joining the tubular portion 42 for holding the wire harness W and the mounting panel P, to the wire harness insertion hole 45.
It is integrally molded on the same axis. The outer member 51 is provided on the flange portion 43 of the tubular portion 42 in the vicinity of the flange portion 43.
In the figure, locking ribs 44, which are locking portions for locking the upper surface and the side surface in surface contact, are provided in an annular shape.

Further, as shown in FIG. 3, the flange portion 43
A cylindrical guide portion 46 having an outer diameter substantially equal to the inner diameter of the through hole 63 is formed on the outer periphery of the wire harness insertion hole 45 on the joint surface 48 joined to the mounting panel P. Further, the outer edge portion of the joint surface 48 of the flange portion 43 has 2
Sealing portions 47, 47 formed of a circular ring-shaped rib are provided. Note that the locking rib 44 does not have to be provided in an annular shape and may be composed of a plurality of protrusions. That is,
As long as the outer member 51 is brought into contact with the upper surface and the side surface of the flange portion 43 in the drawing as described later, the outer member 51 may be locked. Further, the number of the seal parts 47 is not limited to two, and it is sufficient that the number of seal parts 47 is one to several. However, the greater the number, the better the sealing property.

As shown in FIG. 1, the outer member 51 is
It is made of a metal or a resin material, and when assembled with the grommet body 41, a disk portion 52 that covers the upper surface of the flange portion 43 and a side wall 53 that covers the side surface are formed, and at the center of the disk portion 52, the cylindrical portion 42 of the grommet body 41 An insertion hole 54 having an inner diameter larger than the outer diameter and smaller than the outer diameter of the locking rib 44 is provided.

Further, rail members 56 are provided at two locations on the side wall 53 which are symmetrically located with respect to the insertion hole 54. Both upper surfaces of the rail members 56, 56 are inclined counterclockwise in a uniform taper shape from an upper portion of the side wall 53 toward a lower end thereof. Further, notches are provided in the vicinity of the upper ends of the rail members 56, 56 on the boundary line with the side wall 53. When the grommet 40 is mounted, when the rail members 56, 56 engage with the hooks 61, 61 and a pressing force acts on the mounting panel P in the vicinity of the upper ends of the rail members 56, 56, the notches provide flexibility due to the notches. The portions near the upper ends of the rail members 56, 56 having the arrow bend downward. Thereby, the contact surfaces of the hooks 61, 61 and the rail members 56, 56 are formed to generate a frictional force with each other, and the outer member 5
1 does not easily rotate in the reverse direction, and the hooks 61, 6
1 and the rail members 56, 56 are prevented from being disengaged.

Further, on the upper surface of the disk portion 52, the grommet 4
In the mounting work of 0, the knob portion 57 which is picked up by the fingers for rotating the outer member 51 has a rail member 56,
It is provided at two locations that are orthogonal to 56 and are symmetrically located about the insertion hole 54. Further, both of the knob portions 57, 57 are formed of flat plates perpendicular to the disc portion 52, and the side end portions thereof face outward so as not to damage the wire harness W by coming into contact with the wire harness W. The corners are rounded and chamfered.

As shown in FIG. 3, a flange portion accommodating chamber 55 is provided inside the disk portion 52 and the side wall 53, and when the grommet body 41 is assembled, the flange portion 43 is in surface contact with the upper surface and the side surface of the flange portion 43. The part 43 is accommodated. Therefore, when the grommet 40 is attached to the attachment panel P, the pressing force transmitted from the outer member 51 to the flange portion 43 acts substantially evenly in the circumferential direction. The rail member 56 is not limited to the form provided at two locations as described above. That is, it is sufficient that the outer member 51 can be engaged with the hook 61 of the mounting panel P described later, and the number of installations is not limited.

The mounting panel P is provided with a through hole 63 into which the guide portion 46 is fitted together with the wire harness W in a substantially circular shape. Furthermore, a hook-shaped hook 6 for engaging the rail member 56 in the vicinity of the through hole 63 of the mounting panel P.
1, 61 have an arcuate length substantially equal to that of the rail members 56, 56, and are projected by welding or the like at opposing positions around the through hole 63.

When the grommet 40 is attached,
The hooks 61, 61 must be able to push the rail members 56, 56 towards the mounting panel P. for that reason,
The height of the hooks 61, 61 is slightly lower than the height of the rail members 56, 56 provided on the side wall 53. Note that, like the rail member 56 described above, the hook 61 is not limited to the form provided at two locations as described above. That is, it is sufficient that the outer member 51 can be engaged with the rail member 56, and the number of installations does not matter.

Next, the highly waterproof grommet 40 of this embodiment.
The procedure for assembling the grommet main body 41 and the outer member 51 in FIG. First, the flange portion accommodation chamber 5
5, the grommet body 41 when the flange portion 43 is housed
On the other hand, in order to make the outer member 51 rotatable, a lubricant is applied to the upper surface and the side surface of the flange portion 43. It should be noted that the portion to which the lubricant is applied is not limited to the upper surface and the side surface of the flange portion 43 as described above. That is, it may be applied to either the upper surface or the side surface of the flange portion 43 or the flange portion accommodation chamber 55 of the outer member 51, but if applied to both of them, the workability is further improved.

Next, the insertion hole 54 of the outer member 51 is inserted into the cylindrical portion 42 of the grommet body 41 from above in the drawing,
The locking rib 44 is pushed over and pushed in until the flange housing chamber 55 of the outer member 51 comes into surface contact with the upper surface and the side surface of the flange 43. As a result, the locking ribs 44 can lock the outer member 51 to the grommet main body 41, and therefore the outer member 51 and the grommet main body 4 in advance.
1 can be assembled together, and the mounting panel P
Can be easily installed.

Further, the highly waterproof grommet 40 of the present embodiment.
The procedure for attaching the above to the attachment panel P will be described with reference to FIGS. First, the guide portion 46 of the grommet main body 41 assembled integrally with the outer member 51 is fitted into the through hole 63 of the mounting panel P. At this time, since the outer diameter of the guide portion 46 is substantially equal to that of the through hole 63, the guide portion 46
Has a positioning effect on the through hole 63 and facilitates fitting the grommet body 41 into the through hole 63.

Next, after fitting the grommet body 41 into the through hole 63, the knob portions 57, 57 of the outer member 51 are grasped, the outer member 51 is rotated counterclockwise, and the rail members 56, 56 are hooked 61. , 61. At this time, the height of the hooks 61, 61 is equal to that of the rail members 56, 56.
Is slightly lower than the height of the upper ends of the rail members 56, 56, a pressing force acts on the mounting panel P in the vicinity of the upper ends of the rail members 56, 56, and the notches near the upper ends of the flexible rail members 56, 56. The part bends downward. As a result, contact surfaces of the hooks 61, 61 and the rail members 56, 56 are formed and frictional forces are generated between them, so that the hooks 61, 61
And the rail members 56, 56 are firmly engaged.

In the above embodiment, the rail member 5 is used as in the highly waterproof grommet 40A shown in FIG.
In some cases, upward projections 58, 58 are provided at the lower end portions of 6, 56. In this case, the mounting panel P is provided with inclined hooks 62, 62 instead of the hooks 61, 61. The inner upper surfaces of the inclined hooks 62, 62 are formed to be lowered counterclockwise at an inclination corresponding to the rail members 56, 56, and the protrusions 58, 58 are engaged from the outside of the ends at the lowest end. The height is as high as possible.

When mounting the grommet 40A, like the grommet 40, after fitting the grommet body 41 into the through hole 63, the knob portions 57, 57 of the outer member 51A are grasped to rotate the outer member 51A counterclockwise. The rail members 56, 56 are engaged with the inclined hooks 62, 62. At this time, a notch is provided in the vicinity of the lower ends of the rail members 56, 56 on the boundary line with the side wall 53, and the upper surfaces of the protrusions 58, 58 reach the lower end portions of the inclined hooks 62, 62. Rail members 56, 56
A portion near the lower end of the is bent downward. In this case, no cutouts are provided in the rail members 56, 56 near the upper ends thereof.

After that, when the outer member 51A is further rotated counterclockwise, the projections 58, 58 are formed so that the slanted hooks 6 are formed.
The click-out is generated by coming out of the end portions of the reference numerals 2, 62 and engaging with the upper surface portions of the end portions. Further, since the rail members 56, 56 and the inclined hooks 62, 62 have the contact surfaces that are equally inclined, the pressing force on the mounting panel P acts on the entire contact surfaces of the rail members 56, 56. Therefore,
The grommet 40A can detect the complete mounting state by the click feeling of the rail members 56, 56 and prevent the outer member 51 from rotating in the reverse direction. Further, the grommet body 41 can be strongly pressed and fixed to the mounting panel P.

Further, in the above-described embodiment, although not shown, a projection may be provided on the side surface of the lower ends of the rail members 56, 56. In this case, the lower ends of the rail members 56, 56 provided with the protrusions are connected to the outer member 51A.
Rail members 56, so that they can be bent inward
A notch is provided in the vicinity of the lower end of 56 on the boundary line with the side wall 53. Therefore, the same effect as that of the grommet 40A can be obtained.

As described above, in the highly waterproof grommet 40 of this embodiment, the outer member 51 and the grommet body 41 can be assembled in advance integrally. Therefore, the mounting work on the mounting panel P becomes easy. Further, since the rail members 56, 56 can be engaged with the hooks 61, 61 by rotating the outer member 51 with the grip portions 57, 57, the mounting work on the mounting panel P becomes easier.

Further, the rail members 56, 56 and the hook 6
The flange portions 43 can be strongly pressed against the mounting panel P together with the outer member 51 by the engagement of 1, 61. Thereby, the seal portion 4 of the grommet body 41
7 strongly contacts the mounting panel P, and high waterproofness can be secured. Further, the hooks 61, 61 and the rail member 5
It is possible to prevent the outer member 51 from easily rotating in the reverse direction by forming the contact surfaces of 6, 6 and 56 to generate a frictional force, and to prevent the hook 61 and the rail member 56 from being disengaged. Thereby, the high waterproof property of the grommet 40 can be stably ensured. Moreover, the flange housing chamber 55 of the outer member 51 is
The flange portion 43 is accommodated in a state of being in surface contact with the upper surface and the side surface of the flange 3. Therefore, since the pressing force transmitted from the outer member 51 to the flange portion 43 acts substantially evenly in the circumferential direction, the grommet main body 41 can be fixed to the mounting panel P while being substantially equally pressed in the circumferential direction. .
Therefore, high waterproofness of the grommet 40 can be obtained.

Further, in the grommet 40A, the complete mounting state can be detected by the click feeling of the rail members 56, 56, and the inclined hooks 62, 62 can be detected.
It is possible to reliably prevent disengagement between the rail member 56 and the rail member 56. Further, the grommet 40A can be pressed firmly against the mounting panel P to be fixed.
Therefore, the grommet 40A can ensure more stable and high waterproofness.

When the rail members 56, 56 are provided with protrusions on the side surfaces at the lower ends, the hooks 61, 61 or the inclined hooks 62, 62 are used as in the case of the grommet 40A.
It is possible to reliably prevent disengagement between the rail member 56 and the rail member 56. Further, since the grommet can be strongly pressed and fixed to the mounting panel P, more stable and high waterproof property can be secured.

[0040]

As described above, according to the highly waterproof grommet of the first aspect of the present invention, the outer member is rotated from above the grommet body so that the rail member is engaged with the engaging portion. Is abutted against the vicinity of the through hole of the mounting panel with a strong pressing force, so that high waterproofness can be secured by a simple mounting operation.

Further, according to the highly waterproof grommet of the second aspect, since the outer member is rotated to engage the tapered rail member with the engaging portion, the pressing force acting on the rail member from the engaging portion is applied. It can be increased with the rotation of the outer member. As a result, the grommet body can be brought into contact with the vicinity of the through hole of the mounting panel with a stronger pressing force.

According to the highly waterproof grommet of the third aspect, when the outer member is rotated to engage the rail member with the engaging portion, the protrusion provided on the end portion of the rail member serves as the engaging portion. Lock. Accordingly, it is possible to prevent the outer member from being carelessly rotated in the reverse direction and the rail member and the engaging portion from being disengaged. Therefore, high waterproofness of the grommet can be stably ensured.

Further, according to the highly waterproof grommet according to the fourth aspect, since the outer member has the knob for mounting, the outer member is rotated by the knob when the grommet is attached so that the rail member can be easily engaged. It can be engaged with the joint. Therefore, the work of attaching the grommet to the vehicle body panel becomes easy.

Further, according to the highly waterproof grommet of the fifth aspect, the outer member can be locked to the locking portion of the grommet main body, so that the outer member and the grommet main body can be handled as one body, and the vehicle body panel. The grommet installation work on the

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a highly waterproof grommet of the present invention.

FIG. 2 is a perspective view showing a state in which a grommet is attached to the attachment panel in FIG.

3 is a vertical sectional view taken along line XX in FIG.

FIG. 4 is an exploded perspective view showing a modified example of the embodiment shown in FIG.

FIG. 5 is an exploded perspective view showing a conventional waterproof grommet.

6 is a perspective view showing a state in which the grommet in FIG. 5 is attached to a panel.

[Explanation of symbols]

40 High waterproof grommet 41 Grommet body 42 Tube 43 Flange 44 Locking rib (locking part) 46 Guide part 47 Seal part 51 Outer member 52 Disc 53 Side wall 56 Rail member 57 Picking section 61 Hook (engagement part) 62 Inclined hook (engagement part) 63 through hole P mounting panel W wire harness

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5G333 AA09 AB16 AB18 AB28 CB19                       EA02                 5G357 DA02 DB03 DC12 DD01 DD05                       DE03                 5G363 AA01 BA02 CB08 DC02

Claims (5)

[Claims] 1. A grommet which is mounted in a through hole formed in a mounting panel and seals a space between the mounting panel and the mounting panel for waterproofing, and a grommet body which is formed of an elastic material and is mounted in the through hole, and a side wall. An outer member that includes a rail member and presses the grommet body against the mounting panel at the time of mounting, and an engaging portion for engaging the rail member in the vicinity of the through hole of the mounting panel are provided. By rotating the outer member to engage the rail member with the engaging portion,
A highly waterproof grommet, wherein the grommet body is fixed to the through hole. 2. The highly waterproof grommet according to claim 1, wherein the rail member is provided in a tapered shape. 3. The highly waterproof grommet according to claim 1, wherein a projection is provided at an end of the rail member. 4. The highly waterproof grommet according to claim 1, wherein the outer member is provided with a knob for mounting. 5. The highly waterproof grommet according to claim 1, wherein the grommet body is provided with a locking portion for locking the outer member.