JPH11332064A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To route grommets mounted on a group of electric wires which are routed from a roof to back door glass and a back door body frame, using only one grommet, without having to bypass the group of electric wires connected to the brake lamp of a back door body frame at the back door glass. SOLUTION: A branch guide tube 20 is mounted to protrude from the outer periphery of the prescribed position of a main tube, at which a hollow part serves as a main electric wire inserting passage and whose ends are opened, a branch electric wire inserting passage formed out of the hollow part of a branch guide tube communicates with the main electric wire inserting passage, and a closed part provided with a plurality of through-holes 20b through which electric wires are passed one by one is formed at the top end of the branch guide tube, so as to comprise a structure such that the branch electric wires can be passed one by one. A group of electric wires routed from the roof to the back door of a hatch back-type vehicle whose back door glass opens/closes independently from the opening/closing of its back door is inserted into a grommet 10, a group of main electric wire routed from the roof side to the back door glass is inserted into the main electric wire inserting passage, and the branch electric wire passage is routed from the roof side to the body frame of the back door.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet to be attached to a group of electric wires routed to an automobile, and more particularly, to a branch guide for branching out a required electric wire from a group of electric wires inserted into the grommet. It is related to the attached grommet.

[0002]

2. Description of the Related Art In a hatchback type vehicle in which a back door glass opens and closes independently of a bag door opening and closing operation, a part of a group of wires arranged from a roof side to a back door side. Is wired to the back door glass and connected to the rear wiper defogger, while the wires branched from these wires are wired to the back door body frame and connected to the brake lamp attached to the back door body frame. .

A wire group W for wiring from the roof side to the back door side usually has a through-hole 1a in the roof panel 1 because the wiring area is a wet area as shown in FIG.
A part of the wire group Wa of the wire group routed inside the back door glass 2 through the elongated grommet 3 inserted between the through-hole 2a of the back door glass 2 and the back door glass 2 is returned to the back door glass. 2 to the position of the brake lamp 5 inserted into the back door body frame 4.

A group of wires W connected to the brake lamp 5
a through the back door glass 2,
Another grommet 6 is attached to the wire group Wa, and the grommet 6 is fitted in the through hole 2b of the back door glass 2.

[0005]

With the above configuration,
Two different types of grommets 3 and 6 are required, which increases the cost, and requires a lot of trouble to attach these grommets to the electric wire and to attach the grommets to the back door glass 2. Furthermore, the electric wire Wa becomes long because it bypasses the back door glass 2, and there is a problem that the cost increases accordingly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem, and enables a wire group connected to a brake lamp of a back door body frame to be routed without detouring the back door glass by using only one grommet. The challenge is to

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a grommet for inserting a group of electric wires and locking the same to a vehicle body, wherein a main cylinder having both ends opened with a hollow portion as a main electric wire insertion passage. A branch guide cylinder is protruded from the outer periphery of a required position of the portion, and a branch wire insertion passage formed of a hollow portion of the branch guide cylinder communicates with the main wire insertion passage, and at a tip of the branch guide cylinder. The present invention provides a grommet characterized in that a grommet is provided in which a closing portion is provided in which a plurality of through holes through which electric wires are passed one by one are provided, and branch wires are passed one by one through these through holes.

The main cylinder may be formed integrally,
It may be formed by being divided in the length direction of the electric wire insertion direction and connecting these divided members. In each case, the vehicle body locking portions are recessed on the outer peripheral surfaces on both sides in the length direction. The branch guide tube portion is protruded from a part of the long wire insertion portion of the main tube portion, so that a group of wires to be inserted inside the grommet can be branched.

It is preferable that the electric wires passed through the branch guide tube are passed through the through holes at the distal end side of the branch guide tube one by one and led to the main tube to be wired.

One or a plurality of sealing projections are provided on the inner peripheral surface of each through hole provided at the closed portion at the tip of the branch guide cylindrical portion, and are pressed against the outer peripheral surface of the electric wire passing through the sealing projections. It is preferable that With this configuration, it is possible to reliably seal the electric wire penetrating through the branch guide tubular portion, and particularly to improve the waterproof performance when wiring is performed in the wet area.

[0011] The branch guide tubular portion is provided so as to be inclined at a required angle in a required direction with respect to the axial direction of the main tubular portion in accordance with the wiring direction of the branch electric wire to be inserted. In this manner, when the branch guide cylinder is inclined, the electric wire inserted from the tip of the branch guide cylinder can be easily joined to the main wire insertion passage of the main cylinder, and the wire insertion operation can be performed smoothly.

The end of the through hole may be closed, and the closed end of the through hole into which the electric wire is inserted may be cut and opened. With this configuration, only the necessary through-holes need to be opened, and it is possible to prevent the occurrence of flooding or the like from unnecessary through-holes that do not allow electric wires to pass through.

The above-described grommet is particularly useful when a group of electric wires routed from the roof of a hatchback type car to the bag door is opened and closed independently of the opening and closing operation of the bag door of the car. Preferably, the main electric wire insertion passage penetrates a main electric wire group routed from the roof side to the back door glass, while the branch electric wire passage extends from the roof side to the back door body frame. The wire group for the lamp is inserted.

When the grommet is used as described above, it is not necessary to detour the wire group to be wired to the back door body frame around the back door glass as shown in FIG. 11, and only one grommet is required. In addition, the number of operations can be reduced.

The grommet to be routed from the roof side to the back door side is divided into a cylindrical elastic resin molded product made of rubber or elastomer and a cylindrical hard resin molded product formed of polypropylene or the like. It is preferable that these molded products are configured so that both ends in the longitudinal direction are mutually locked and sequentially connected.

More specifically, a bellows-shaped cylindrical portion which is bent and continuous from a large-diameter cylindrical portion in which a resin inner provided with a vehicle body locking portion is fitted is provided as the elastic material molded product. A first elastic material-formed product having a locked portion on the inner peripheral surface at the tip, and a flat, elongated cylindrical shape, with locked portions provided on inner circumferential surfaces at both ends thereof;
A second elastic molded product corresponding to the main cylindrical portion provided with a branch guide cylindrical portion protruding from a required position in a longitudinal direction in a required direction; And a third elastic molded product in which the other end side is branched into a plurality of cylindrical portions, and a body engaging portion is provided in each of the branched cylindrical portions, while the hard resin molded product has a perfect circular shape. A flat cylindrical portion is bent from one end of the cylindrical portion, and a locking portion for locking with the locked portion of the first elastic material molded product is provided on one end outer peripheral surface, and a flat other end outer periphery is provided. A first hard resin molded product having a locking portion for locking with a locked portion of the second elastic material molded product on a surface thereof, and a flat tubular shape having an intermediate portion in a longitudinal direction thereof bent, A locking portion for locking the locked portion of the second elastic member protrudes from one end outer peripheral surface, and the third elastic material molded product is formed on the other end outer peripheral surface. A second hard resin molded product having a locking portion and a locking portion projecting from the third elastic material molded product; a second hard resin molded product, a second elastic material molded product, The locking piece is sequentially locked to the locked piece through a group of electric wires to the first hard resin molded product and the first elastic material government product to form a connection structure.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 8 show a first embodiment, and the grommet 10 of the first embodiment is attached to a group of electric wires wired from the roof side to the back door. The grommet 10 includes a first elastic material molded product 11, a second elastic material molded product 12, a third elastic material molded product 13 made of rubber or an elastomer, and a first hard resin molded product 14 made of polypropylene, and a second hard resin molded product. It consists of fifteen. Each of these molded products has a cylindrical shape, and the first elastic material molded product 11,
The first hard resin molded product 14, the second elastic material molded product 12, the second
The hard resin molded product 15 and the third elastic material molded product 13 are sequentially connected to each other to form a main wire insertion passage that is connected in series.

As shown schematically in FIG. 2, the grommet 10 has a through hole formed in the roof panel 1 with a vehicle body engaging portion 16a of a resin inner 16 fitted inside the first elastic molded product 11 at one end. 1a, and two vehicle body locking portions 13a-1 and 13b-1 provided on the branch cylinder portions 13a and 13b of the third elastic molded product 13 on the other end side are provided on the back door glass 2. Fitted in the through holes 2a ', 2b'. Second elastic material molded product 1 to be assembled to the intermediate portion of the grommet 10
2 is provided with a branch guide cylinder 20 projecting therefrom.

The wire group passed through the grommet 10 is routed from the roof side to the bag door side, and the main part of the wire group is opened and closed independently of the opening and closing operation of the back door through the main wire insertion passage. In addition to wiring to the operating backdoor glass 2, the remaining portion (two wires in this embodiment) is wired to the backdoor body frame 4 through the branch guide tube 20.

The first molded article of elastic material 11 is shown in FIG.
(B) The shape shown in (C). That is, the bellows-like cylindrical portion 11c which is bent at 90 degrees to the reduced diameter side of the elliptical enlarged-diameter cylindrical portion 11b is provided continuously. A resin inner 16 is internally fitted and locked inside the enlarged-diameter cylindrical portion 11b, and a vehicle body locking piece 16a is provided on the resin inner 16 so as to be locked in the through hole 1a of the roof panel 1. I have. Also, two locked portions 11d are recessed on the inner peripheral surface at the tip of the cylindrical portion 1111c, and a seal lip 11f protrudes between the locked portions 11d.

The second hard resin molded product 14 is shown in FIG.
(A) As shown in (B) and (C), it has an L shape bent at 90 degrees at the middle part. One side of the L-shape is a true circular cylinder 1
4a, and the other side is a flat cylindrical portion 14b.
One end of the cylindrical portion 14a is an opening, and two engaging portions 14c for engaging the first elastic material molded article 11 on the outer peripheral edge of the opening.
Is protruding. The other end of the cylindrical portion 14a is a closed surface, and a flat cylindrical portion 14b is formed from the peripheral wall at a position close to the closed surface.
Are formed so as to communicate with each other, and two locking portions 14 for locking the second elastic material molded product 12 to the outer peripheral edge of the distal end opening of the cylindrical portion 14b.
e is protruding.

The second elastic material molded product 12 is shown in FIG.
As shown in (B), (C), (D), and (E), the branch guide tube portion 20 protrudes from a flat tube-shaped main tube portion 12a. More specifically, the main cylinder portion 12a is configured such that the opening sides on both sides are in FIG.
5D, while the middle part is shown in FIG.
As shown in (E), the flatness has a square shape. On the inner peripheral surface at one end of the cylindrical portion 12a, two locked portions 12b for engaging with the first hard resin molded product 14 are provided, and on the inner peripheral surface at the other end, the second rigid resin molded product 15 is engaged. The two locked portions 12d are provided, and seal lips 12f and 12g are protruded between the two locked portions, respectively.

The branch guide tube portion 20 projects obliquely from the peripheral surface of the main tube portion 12a, and the hollow portion serving as the branch wire insertion passage 20a communicates with the hollow portion serving as the main wire insertion passage 12h of the main tube portion 12a. doing. At the tip of the branch guide cylinder 20,
A closed portion 20d provided with two through holes 20b and 20c for passing electric wires one by one is provided. These through holes 20b, 20
Two annular sealing projections 20e and 20f are provided on the inner peripheral surface of c at intervals in the axial direction, and are respectively pressed against the outer peripheral surfaces of the electric wires w1 and w2 passing through the sealing projections 20e and 20f. I have to.

The second hard resin molded product 15 is shown in FIG.
(A) The shape shown in (B) is a flat cylindrical shape,
The middle part in the length direction is bent at a gentle angle (about 150 degrees). This bending corresponds to the shape of the wiring space. One end opening of the flat cylindrical portion 15a is engaged with the second elastic material molded product 12, and the other end opening is engaged with the third elastic material molded product 13. Portions 15b and 15c are protruded.

The third elastic material molded article 13 is shown in FIG.
(B) In the shape shown in (C) and (D), the portion to be locked to the second hard resin molded product 15 is a flat cylindrical portion 13c, and two branch cylindrical portions are formed from the enlarged diameter of the cylindrical portion. 13a and 13b are provided integrally. Flanges 13d and 13f are provided on the outer peripheral surface of the base of the branch cylinders 13a and 13b on the base side. In addition, a small-diameter branch cylinder 13a extending from the flanges 13d and 13f,
Providing slits 13g and 13h opposed to 13b facilitates insertion of electric wires.

The first, second, and third elastic material molded articles 11, 12, 13 and the first and second hard resin molded articles 14, 15 that constitute the grommet 10 are assembled before being assembled as shown in FIG. , Third elastic molded article 13 → second hard resin molded article 1
5 → second elastic material molded product 12 → first hard resin molded product 14 →
The wire group W is inserted in the order of the first elastic material molded product 11.
At this time, as shown in FIG. 8, the two through-holes 20 are also provided from the distal end side of the branch guide cylindrical portion 20 of the second elastic material molded product 12.
Wires w1 and w2 are inserted into b and 20c, respectively.

The electric wires w1 and w2 are inserted into the branch guide cylinder 20 so that the branch guide cylinder 20 is inclined from the main cylinder 12a and protrudes. It can smoothly merge with the main wire insertion passage of the cylindrical portion 12a.

After passing the electric wires w1, w2 and the electric wire group W through the molded products 11 to 15, a third electric wire is inserted in accordance with the electric wire insertion order.
Each of the locking portions is set to the locked portion in the order of the elastic material molded product 13 → the second hard resin molded product 15 → the second elastic material molded product 12 → the first hard resin molded product 14 → the first elastic material molded product 11. Lock and connect.

As described above, since the electric wires are sequentially inserted into the five divided molded products and then the molded products are connected, the electric wire group W
In addition, the insertion work of the electric wires w1 and w2 can be easily performed.

As described above, with the electric wires passed through the grommet 10, the grommet 10 is attached from the roof 1 side of the automobile to the back door side as shown in FIG. That is,
The resin inner 16 of the first elastic molded article 11 is fitted and attached to the through hole 1 a provided in the roof panel 1, and
The vehicle body locking portions 13a-1 and 13b-1 of the branch cylinders branched into two of the third elastic material molded product 13
The two through holes 2a 'and 2b' are fitted respectively. The electric wire W drawn from the branch tube portions 13a and 13b is connected to a rear wiper and a defogger attached to the back door glass 2.

The roof panel 1 and the back door glass 2
The branch guide tubular portion 20 protrudes from the second elastic material molded product 12 of the grommet 10 attached between the two, and the two wires w1 and w2 are drawn out from the branch guide tubular portion 20, and these wires w1 and w2 are connected to the back door body. It is connected to the brake lamp 5 attached to the frame 4.

As described above, the electric wires w1 and w for the brake lamp, which are conventionally wired around the back door glass 2, are provided.
2 can be wired directly through the grommet 10 from the roof side without bypassing the back door glass 2.

FIG. 9 shows a second embodiment of the present invention, in which a branch guide tube portion 20 'protrudes from the peripheral wall of the enlarged diameter tube portion 31 of the funnel type grommet 30. This branch guide cylinder 2
0 'also has two through holes 20 for inserting two electric wires one by one.
b ', 20c'
double seal lip 20b- on the inner peripheral surface of b ', 20c'
1 ′, 20c-1 ′.

The grommet 30 includes a branch wire w1,
w2 is passed through the through-holes 20b ', 20
Each of them can be inserted into c ′ to branch off from the main wire group W passing through the grommet 30.

FIG. 10 shows a third embodiment, in which a small-diameter pipe portion 2 communicating with each through hole 20b, 20c from the tip of a branch guide cylinder portion 20 protrudingly provided in communication with the main cylinder portion of the grommet.
0m and 20n are projected, and these small-diameter pipe sections 20m and 20n
n is closed at the tip.

In the above grommet, the through holes 20b, 20
When the electric wires are passed through each of the small diameter pipe sections 20m and 20n
Is cut off using scissors or the like, and is kept closed when no electric wires are passed. In addition, through hole 2
When the electric wire is passed through only 0b, only the closed portion of the small-diameter tube portion 20m is cut, and the through hole 20c is closed without cutting.

As described above, if the tip of the through hole provided on the tip side of the branch guide cylinder is closed and cut as needed, the through hole is not opened unnecessarily, Can be prevented from occurring.

[0039]

As is apparent from the above description, the grommet according to the present invention has the branch guide tube portion projecting from a required position of the main tube portion constituting the main electric wire insertion passage. In the above, the electric wire group can be branched and the electric wire can be wired in a direction different from that of the main electric wire group.

Accordingly, it is not necessary to route the wires to be routed to the back door body frame among the wires to be routed from the roof side to the back door side while bypassing the back door glass. The length can be shortened, and only one grommet is required, so that the cost can be reduced accordingly.

Further, when the grommet of the present invention is used, a group of electric wires branched and routed in a wet area of an automobile can be formed.
Since the cable can be routed with the grommet completely protected, it is possible to surely waterproof the wire group.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a grommet according to a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing a state in which a wire group using the grommet of FIG.

3A and 3B show a first elastic material molded product used in the first embodiment, wherein FIG. 3A is a plan view, FIG. 3B is a sectional view, and FIG. 3C is a bottom view.

4A and 4B show a first hard resin molded product used in the embodiment, wherein FIG. 4A is a plan view, FIG. 4B is a right side view, and FIG.
Is a front view.

5A and 5B show a second elastic material molded product used in the first embodiment, wherein FIG. 5A is a plan view, FIG. 5B is a cross-sectional view, FIG. 5C is a cross-sectional view taken along line CC of FIG. (D) is a sectional view taken along line DD of (A), and (E) is a sectional view taken along line EE of (A).

FIG. 6 shows a second hard resin molded product used in the first embodiment, (A) is a plan view, and (B) is a front view.

FIG. 7 shows a third elastic material molded product used in the first embodiment, (A) is a plan view, (B) is a front view, (C) is a cross-sectional view taken along line AA of (B), (D) is a bottom view.

8A and 8B show a state in which an electric wire is passed through the branch guide tube portion of the grommet according to the first embodiment, and FIG.
(B) is a principal part enlarged sectional view.

FIG. 9 is a cross-sectional view illustrating a grommet according to a second embodiment.

FIG. 10 is an enlarged sectional view of a main part of a grommet according to a third embodiment.

FIG. 11 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roof panel 2 Back door glass 10 Grommet 11 1st elastic material molded product 12 2nd elastic material molded product 12a Main cylinder part 13 3rd elastic material molded product 14 1st hard resin molded product 15 2nd hard resin molded product 20 branch Guide tube part 20b, 20c Through hole

Claims (5)

[Claims] 1. A grommet for inserting a group of electric wires and locking the same to a vehicle body, wherein a branch guide cylinder is protruded from an outer periphery of a required position of a main cylinder having openings at both ends with a hollow portion as a main electric wire insertion passage. A branch wire insertion passage formed of a hollow portion of the branch guide tube portion is communicated with the main wire insertion passage, and a plurality of through holes through which electric wires are passed one by one at the tip of the branch guide tube portion. A grommet, characterized in that the provided grommet is provided with a closing portion, and branch wires are passed one by one through these through holes. 2. One or a plurality of sealing projections are provided on the inner peripheral surface of each through hole provided at the closing portion at the tip of the branch guide cylindrical portion, and the outer peripheral surface of an electric wire passing through the sealing projection is pressed against the outer peripheral surface. The grommet according to claim 1, wherein the grommet has a configuration. 3. The branch guide tube portion is provided so as to be inclined at a required angle in a required direction with respect to an axial direction of the main tube portion in accordance with a wiring direction of a branch electric wire to be inserted. The grommet according to claim 2. 4. The method according to claim 1, wherein the end of the through hole is closed, and the end closed portion of the through hole through which the electric wire is inserted is cut and opened. Grommet described. 5. A hatchback type vehicle in which a back door glass opens and closes independently of an opening and closing operation of a bag door of an automobile. The insertion passage penetrates a main electric wire group routed from the roof side to the back door glass, while the branch electric wire passage penetrates a brake lamp electric wire group routed from the roof side to the door body. Certain claims 1 to 4
The grommet according to any one of the above.