JP2904026B2 - Jig for forming waterproof structure of grommet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for forming a waterproof structure of a grommet, and more particularly, to a grommet mounted in a through hole for inserting a wire harness provided in a partition partitioning a cabin side and an outside of a vehicle. The present invention relates to a grommet waterproof structure forming jig which improves productivity and workability when forming a structure.

[0002]

2. Description of the Related Art In an automobile, when a wire harness is routed from the outside of an engine room or the like to the inside of the vehicle, the wire harness may be covered with water such as rainwater on the outside of the vehicle and may be flooded in the wire harness. Water immersed in the wire harness is transmitted to the cabin through the inside of the wire harness due to the negative pressure generated in the cabin during traveling of the car or the height difference when the route on the cabin side is low. The connector connected to the cabin side of the vehicle may be corroded, or water may drop into the cabin. For this reason, various waterproofing measures have conventionally been taken for wire harnesses that are routed in places that are likely to be exposed to water. As one of the measures, one of the wire harness inserts provided in a partition wall that separates the vehicle compartment side from the vehicle exterior side is provided. It has been proposed to form a waterproof structure on a grommet mounted in a through hole for general use.

For example, in a waterproof structure disclosed in Japanese Utility Model Laid-Open Publication No. 63-2327, as shown in FIG. 12, a diameter expansion in which an engaging groove 1a is provided in a through hole 2a provided in a partition wall 2 on an outer peripheral surface. Portion 1b and a reduced diameter portion 1c connected to one end of the enlarged diameter portion 1b.
The filler 3 is injected from the opening 1d on the other end side of the enlarged diameter portion 1b, and the filler 3 is supplied to the reduced diameter portion 1c closely fitted to the wire harness W / H. Have penetrated. The filler 3 is a liquid curable resin which is liquid but hardens with time. However, in this waterproof structure, the filling material 3 injected from the opening 1d side is used.
Is difficult to penetrate uniformly between the electric wires 5 constituting the wire harness W / H and between the electric wires 5 on the outer periphery of the wire harness W / H and the reduced diameter portion 1c, and a sufficient waterproof effect is obtained. May not be obtained.

On the other hand, Japanese Unexamined Patent Publication No. Hei 6-205528 proposes a waterproof structure shown in FIGS. 13A and 13B. In this waterproof structure, a filler outflow hole 6 is provided at one end.
a, when the grommet 7 is mounted on the grommet 7, a filler injecting member 6 having an expanding portion 6b for expanding the gap between the electric wires 5 and a lock portion 6c at the other end is mounted in the grommet 7, and The filler 3 is injected into the grommet 7 by the cylinder 8 from the filler injection hole 6d of the member 6 for use. In this waterproof structure, the space between the electric wires 5 of the wire harness W / H is expanded by the filler injecting member 6 and the filler 3 is supplied from the central portion of the wire harness W / H. The material 3 can be uniformly permeated.

Japanese Utility Model Laid-Open Publication No. 63-194581 proposes a waterproof structure as shown in FIG. In this waterproof structure, by inserting a columnar spacer 10 into the wire harness W / H inserted through the grommet 9, the distance between the wires 5 of the wire harness W / H is pushed and expanded, and the filler 3 is made uniform. I try to penetrate.

[0006]

However, the above conventional waterproof structure has the following problems. First, FIG.
In the waterproof structure according to JP-A-6-205528 shown in (A) and (B), the distal end portion 6e of the filler injecting member 6 is inserted into the wire harness W / H. Since the binding between the electric wires 5 constituting the
If the diameter of the tip portion 6e is too large, the tip portion 6e cannot be inserted into the wire harness W / H. Therefore, the distal end portion 6e of the filler injecting member 6 has a small diameter, and the opening area of the filler outflow hole 6a is also small. If the area of the portion from which the filler 3 flows out is small, the time required to eject a certain amount of the filler 3 becomes longer, and the filler 3 is uniformly distributed between the electric wires 5 constituting the wire harness W / H. The time required to infiltrate the water also increases. Therefore, when this waterproof structure is adopted, the time required for producing the wire harness W / H becomes long, and there is a problem in productivity.

On the other hand, in the waterproof structure according to Japanese Utility Model Application Laid-Open No. 63-194581, in order to widen the gap between the electric wires 5 constituting the wire harness W / H, the spacer 10 is inserted as described above and the filler is used. It is necessary to remove the spacer 10 after the injection of 3, and the operation is troublesome. Further, when the filler 3 is injected into the grommet 9 with the spacer 10 inserted as described above, the filler 3 is applied to the spacer 10 and the spacer 10 may be contaminated. in this case,
Before using the spacer 10 again, the fixed filler 3
Need to be wiped off, making the work even more troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in forming a waterproof structure on a grommet and to improve productivity and workability in forming a waterproof structure on a grommet. is there.

[0009]

SUMMARY OF THE INVENTION Accordingly, the present invention provides an insertion part for inserting an injection pipe of a filler supply device, a fixing part for positioning and fixing a required position of the injection pipe provided in the insertion part, A spacer that projects outward from the insertion portion and is inserted between the wires constituting the wire harness to form a gap between the wires, and is positioned and fixed at a position separated by a predetermined distance from the tip of the injection pipe. Pressing the wire harness inserted into the grommet against the spacer portion to provide a gap between the wires constituting the wire harness by the spacer portion,
The present invention provides a jig for forming a waterproof structure of a grommet, wherein a filler is injected into the gap from an injection pipe.

[0010]

When a waterproof structure is formed on a grommet using the jig for forming a waterproof structure of a grommet of the present invention, first, an injection pipe of a filler supply device is inserted into an insertion portion and separated from a tip of the injection pipe. At the position, it is fixed to the jig for forming the waterproof structure by the fixing part. Next, the wire harness inserted into the grommet is pressed against the spacer to provide a gap between the wires constituting the wire harness, and the tip of the injection pipe is positioned in the grommet, and the filler is injected from the injection pipe in this state. I do. The injected filler first penetrates into the center part of the wire harness and then to the outer periphery, so that the filler penetrates reliably and sufficiently between the wires of the wire harness located at the reduced diameter part of the grommet. I do.

According to the present invention, since a gap is formed between the wires of the wire harness by inserting the spacer portion, the diameter of the injection pipe can be set large, and the required amount of filler can be injected. The time required for is reduced.

Further, the jig for forming a waterproof structure according to the present invention comprises:
Since the wire harness inserted through the grommet is brought close to the injection tube because the wire harness is fixed to the injection tube of the filler supply device as described above, the spacer is automatically inserted into the wire harness and the wire harness is injected. If you move away from the tube, the spacer is automatically pulled out of the wire harness. In addition, since the jig for forming a waterproof structure of the present invention is mounted at a position distant from the tip of the injection pipe, the filler is not applied when the filler is injected.

[0013]

Next, the present invention will be described in detail based on an embodiment shown in the drawings. 1 to 6 show a jig 1 for forming a waterproof structure of a grommet according to a first embodiment of the present invention.
Reference numeral 1 is made of resin and has an annular insertion portion 11a. The inner diameter of the insertion portion 11a is set to a size that allows the injection nozzle 18 of the filler supply device 17 described later to be inserted. The thickness t of the insertion portion 11a is
a is set to such a size that it does not easily deform and can maintain an annular shape.

A spacer portion 11b is protruded from a part of the outer periphery of the insertion portion 11a. In the first embodiment,
The spacer portion 11b includes a flat plate portion 11c that protrudes outward from a part of the insertion portion 11a, and a pushing portion 11d provided at the tip of the flat plate portion 11c. The pushing portion 11d has an arrow shape, and includes base surfaces 11e, 11e that are substantially perpendicular to the projecting direction of the flat plate portion 11c, and inclined surfaces 11f, 11f that become narrower toward the tip. .

A screw hole 11g provided with a female thread is provided at a position of the insertion portion 11a facing the spacer portion 11b so as to penetrate in the thickness t direction, and a bolt 13 is screwed into the screw hole 11g. The screw hole 11g and the bolt 13
Constitute a fixing portion for positioning and fixing the jig 11 for forming a waterproof structure at a predetermined position of the injection tube 18.

Next, an operation of forming a waterproof structure on a grommet using the waterproof structure forming jig of the first embodiment will be described. Note that, as shown in FIG.
Is provided with a locking groove 15a on the outer peripheral surface for engaging with a through hole (not shown) provided in the partition wall, and an enlarged diameter portion 15b into which the wire harness W / H is loosely inserted; A reduced diameter portion 15c through which the wire harness W / H is continuously inserted with its outer periphery tightened is provided.

First, as shown in FIGS. 1, 3 and 4,
The jig 11 for forming a waterproof structure is attached to the injection pipe 18 of the filler injection device 17. The filler injecting device 17 is a device for injecting a two-component filler into a waterproof portion, and includes tanks 19A and 19B in which a main agent and a curing agent are stored, respectively. When the main agent and the curing agent are mixed, the filler 3 is cured from a liquid state over time. Tank 19A,
One end of the supply pipes 20A and 20B bent in an L shape is connected to 19B, and the other end of the supply pipes 20A and 20B is connected to the injection pipe 18. Further, the nozzle 18 is formed by gradually reducing the diameter of the tip 18a on the other end side of the injection pipe 18.
In addition, the supply pipes 2A and 20B are connected to these supply pipes 2A and 20B.
Valves 21A, 2 for communicating and shutting off 0A, 20B
1B is provided, and when the valves 21A and 21B are opened, the main agent and the curing agent are supplied and mixed into the injection pipe 18, while when the valves 21A and 21B are closed, the injection of the main agent and the curing agent 18 is performed. Supply is stopped.

When the injection pipe 18 is inserted into the insertion portion 11a of the jig 11 for forming a waterproof structure, and the bolt 13 is tightened at a position above the injection pipe 18 at a predetermined distance from the tip 18a of the injection pipe 18, as shown in FIG. The injection pipe 18 is sandwiched between the tip 13a of the bolt 13 and the inner peripheral surface of the insertion part 11a on the spacer part 11b side.
Is fixed.

Next, the connector 23 is attached in advance, and the wire harness W / H
1 is moved to the filler injection device 17 side as shown by the arrow in FIG. 1, and the tip 18a of the injection pipe 18 is disposed in the enlarged diameter portion 15b of the grommet 15, while the wire harness W / H
Is pressed against the spacer portion 11b of the jig 11 for forming a waterproof structure, and the spacer portion 11b is inserted into the wire harness W / H.

As shown in FIG. 5 and FIG.
When the wire harness W / H is pressed against the jig 11 for forming a waterproof structure until the end of the wire harness W / H reaches the outer periphery on the opposite side of the wire harness W / H, the electric wire 5 constituting the wire harness W / H is changed by the spacer portion 11b. Wire harness W / H
Are divided into two at a radially central portion, and a gap 26 is formed.

Next, the direction of the wire harness W / H is adjusted so that the distal end 18a of the injection pipe 18 is located at the radial center of the wire harness W / H within the gap 26, and then the filler is injected. The valves 21A and 21B of the device 17 are opened to supply the main agent of the two-component filler and the curing agent to the injection pipe 18 and mix them in the injection pipe 18 to form the filler 3. The enlarged diameter portion 15 of the grommet 15 from the tip 18a
b. Filler 3 is supplied. After filling the required amount of the filler 3 into the grommet 11, the wire harness W / H is pulled out from the jig 11 for forming a waterproof structure, and transferred to the next step.

At this time, a gap 26 exists between the electric wires 5 constituting the wire harness W / H located in the enlarged diameter portion 15 by the jig 11 for forming a waterproof structure as described above, and
Since the distal end 18a of the injection pipe 18 is located at the radial center of the wire harness W / H in the gap 26, the filler 3 in which the main agent and the curing agent are mixed is first filled with the wire harness W / H. And then to the outer periphery. Therefore, the jig 11 for forming the waterproof structure
Is used, the permeability of the filler 3 is good, and the filler 3 can be surely and sufficiently penetrated to the electric wire 5 of the wire harness W / H located at the reduced diameter portion 15c of the grommet 15.

In the first embodiment, what is inserted into the electric wire 5 constituting the wire harness W / H as described above is the spacer portion 11b of the jig 11 for forming the waterproof structure, and the filler injection device 17 is used. Since the injection tube 18 is not
Can be set large, and the time required to inject the required amount of the filler 3 can be reduced. As described above, by using the jig 11 for forming a waterproof structure of the first embodiment, the filler can be surely and sufficiently penetrated in a short time, and the productivity can be improved.

Further, since the jig 11 for forming the waterproof structure is fixed to the injection pipe 18 of the filler supplying device 17 as described above, the wire harness W /
When the H is brought closer to the injection pipe 18, the spacer portion 11 is automatically inserted into the wire harness W / H, and when the wire harness W / H is moved away from the injection pipe 18, the wire harness W / H is automatically set. The spacer 18 is pulled out of the substrate. Further, the jig 11 for forming a waterproof structure according to the first embodiment.
Is mounted at a required position of the injection pipe 18 and is located above the tip 18a of the injection pipe 18, which is an outlet for the filler 3. Therefore, the filler 3 is not applied to the waterproof structure forming jig 18 when the filler 3 is injected, so that the spacer portion 11b is not stained, and it is not necessary to wipe the waterproof structure forming jig 11. From these points, when the waterproof structure forming jig 11 of the first embodiment is used, it is possible to efficiently perform the waterproof structure forming operation.

FIG. 7 shows a jig 31 for forming a waterproof structure according to a second embodiment of the present invention. In the second embodiment,
The shape of the spacer portion 31b projecting outward from the insertion portion 31a is different from that of the first embodiment. That is, in the second embodiment, the pushing part 31d provided at the tip of the flat part 31c
Has a shape of the base surfaces 31e, 31e as a convex curved surface,
The inclined surfaces 31f, 31 continue from the base surfaces 31e, 31e.
f is provided. When the pressing portion 31d has such a shape, the wire harness W / H after the filling material 3 is injected.
When the wire is pulled out, the electric wire 5 is not caught on the base surfaces 31e, 31e, and the jig 3 for forming the waterproof structure is securely and smoothly.
1 can be disengaged.

FIG. 8 shows a jig 41 for forming a waterproof structure according to a third embodiment of the present invention. In the third embodiment,
The spacer portion 41b projecting outward from the insertion portion 41a is
A configuration is provided in which a columnar pressing portion 41d at the tip of the flat plate portion 41c is provided, and the entire outer periphery of the pressing portion 41d is a convex curved surface. In the third embodiment, similarly to the second embodiment, when the wire harness W / H is pulled out after the filling material is injected, the electric wire 5 is not caught and the jig 41 for forming the waterproof structure is securely and smoothly. Can be removed from

FIG. 9 shows a jig 51 for forming a waterproof structure according to a fourth embodiment of the present invention. In the fourth embodiment,
A pair of flat plate portions 51 spaced apart from each other by a predetermined distance
b, 51c, and each of the flat portions 51b, 51c.
Pushing part 5 in the shape of dividing a cylinder into two in the radial direction at the tip of
1d and 51e are provided to form a spacer portion 51f. When the spacer portion 51f has such a shape, when the waterproof structure forming jig 51 is inserted into the wire harness W / H,
Two gaps are formed in the wire harness W / H, and the electric wire 5 constituting the wire harness W / H is divided into three. Therefore, the waterproof structure forming jig 51 of the fourth embodiment is particularly suitable for forming a waterproof structure on a large-diameter wire harness W / H.

A jig 11 'for forming a waterproof structure according to a fifth embodiment of the present invention shown in FIG. 10 differs from the first embodiment in the mounting structure to the injection pipe 18. That is, in the fifth embodiment, a part of the nozzle insertion portion 11a 'is cut, and the flange portion 11 is turned radially outward at the cut portion.
h ′ and 11i ′ are provided. This flange portion 11
h ′ and 11i ′ have screw holes 11 at positions corresponding to each other.
j ′, 11j ′, and the screw holes 11j ′, 1
A bolt 13 is screwed into 1j '. In the fifth embodiment, when the injection pipe 18 is inserted into the insertion portion 11a and the bolt 13 is tightened in a state where the waterproof structure forming jig 11 'is located at a required position, the nozzle insertion portion 11a' The outer diameter of the injection tube 18 is tightened by reducing the diameter, whereby the jig 11 ′ for forming a waterproof structure is fixed to the injection tube 18. The other configurations and operations of the second to fifth embodiments are the same as those of the first embodiment.

FIG. 11 shows a waterproof structure forming jig according to a sixth embodiment of the present invention. In the sixth embodiment, the insertion portion 61a has a thick base portion 61c provided with a spacer portion 61b protruding therefrom, and a band-like portion having a thin thickness set at both ends of the base portion 61c so as to have flexibility. 61d, 61
e is connected to one end. In addition, each band-shaped portion 61d,
A buckle mechanism is provided at the other end of 61e. That is, the one band-shaped portion 61d is provided with a plurality of engagement holes 61f at the end opposite to the base 61c. Also,
The other band-shaped portion 61e is provided with tubular portions 61g and 61h at the end opposite to the substrate 61c.
One side of a rectangular frame-shaped fitting 62 is inserted into the shaft holes 61i of 1g and 61h. One side of the metal fitting 62 inserted into the shaft hole 61i has an annular portion 63a provided at one end of a rod-shaped metal fitting 63.
And the bracket 63 is supported by the bracket 63 so as to be swingable about the annular portion 63a. Further, near the tip of the band-shaped portion 61e, band-shaped portions 61d and 61d are provided.
A ring-shaped body 64 provided with a hole 64a having a rectangular cross section with a thickness of approximately two sheets e is fitted around.

When attaching the jig for forming a waterproof structure according to the sixth embodiment to the injection pipe 18, the band-shaped parts 61d and 61e are wound around the outer periphery of the injection pipe 18, and the band-shaped part 61d provided with the engaging hole 61f is provided. Is inserted into the fitting 62, and the tip of the fitting 63 is inserted into the engagement hole 61f at a position where the injection tube 18 can be tightened with an appropriate force. Then, the tip of the band-shaped portion 61d is attached to the tip of the ring-shaped body 64. Insert. As described above, the jig 61 for forming the waterproof structure according to the sixth embodiment is fixed to the injection pipe 18 by tightening the injection pipe 18 by the buckle mechanism. And it can be firmly attached. Other structures and operations of the sixth embodiment are the same as those of the first embodiment.

The present invention is not limited to the above embodiment, but can be variously modified. For example, the shape of the pushing portion is not limited to the shape of the above-described embodiment, and may be any shape such as a spherical shape, an elliptical spherical shape, and a prismatic shape as long as the shape can be inserted into the wire harness. .

Further, the mechanism for fixing the nozzle insertion portion to the injection pipe is not limited to that of the above embodiment, and the position of the waterproof structure forming jig does not shift when the wire harness is pressed against the pressing portion. Any structure may be used as long as it is fixed with, for example, a double-sided tape.

[0033]

As is apparent from the above description, if the grommet waterproof structure is formed by using the grommet waterproof structure forming jig according to the present invention, the spacer between the electric wires constituting the wire harness is formed by the spacer. A gap is formed, and
Since the filler is supplied to the gap from the tip of the injection pipe, the filler first penetrates into the central portion of the wire harness, and then penetrates to the outer peripheral side. Therefore, when this waterproofing structure forming jig is used, the permeability of the filler is good, and the filler can be surely and sufficiently penetrated between the wires of the wire harness in the grommet.

When the jig for forming the waterproof structure of the grommet according to the present invention is used, a gap is formed between the wires of the wire harness by the spacer portion, so that the diameter of the injection pipe of the filler supplying device is increased. The time required for injecting the required filler can be reduced, the filler can be surely and sufficiently penetrated in a short time, and productivity can be improved.

Further, the jig for forming a waterproof structure according to the present invention comprises:
Since the wire harness inserted through the grommet is brought close to the injection tube because the wire harness is fixed to the injection tube of the filler supply device as described above, the spacer is automatically inserted into the wire harness and the wire harness is injected. If you move away from the tube, the spacer is automatically pulled out of the wire harness. In addition, since the jig for forming a waterproof structure of the present invention is mounted at a position away from the tip of the injection pipe, the jig for forming a waterproof structure can be used without being filled with the filler when the filler is injected. No need to wipe off. Therefore, when the waterproofing structure forming jig of the present invention is used, the waterproofing structure forming operation can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view for explaining a use state of a jig for forming a waterproof structure of a grommet according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a jig for forming a waterproof structure of a grommet according to the first embodiment.

FIG. 3 is an enlarged perspective view of a portion A of FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a schematic perspective view showing a state where a spacer portion is inserted into a wire harness.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a perspective view showing a second embodiment of the present invention.

FIG. 8 is a perspective view showing a third embodiment of the present invention.

FIG. 9 is a perspective view showing a fourth embodiment of the present invention.

FIG. 10 is a perspective view showing a fifth embodiment of the present invention.

FIG. 11 is a perspective view showing a sixth embodiment of the present invention.

FIG. 12 is a sectional view showing an example of a conventional waterproof structure.

13A is a perspective view showing a filler injecting member in a conventional waterproof structure, and FIG. 13B is a cross-sectional view showing a waterproof structure using the filler injecting member.

FIG. 14 is a schematic view showing another example of a conventional waterproof structure.

[Explanation of symbols]

Reference Signs List 3 filler 5 electric wire 11, 11 ', 31, 41, 51, 61 waterproof structure forming jig 11a, 11a', 31a, 41a, 51a, 61a
Insertion parts 11b, 11b ', 31b, 41b, 51b, 61b
Spacer 13 Bolt 15 Grommet 17 Filler supply device 18 Injection pipe 26 Gap W / H Wire harness

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-198210 (JP, A) JP-A-63-254604 (JP, A) JP-A-6-205528 (JP, A) JP-A-6-205528 233435 (JP, A) Japanese Utility Model 63-2327 (JP, U) Japanese Utility Model 63-194581 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02G 3/22

Claims (1)

(57) [Claims] An insertion portion for inserting an injection tube of a filler supply device, a fixing portion for positioning and fixing a predetermined position of the injection tube provided in the insertion portion, a wire protruding outward from the insertion portion, and A spacer portion inserted between the electric wires constituting the harness to form a gap between the electric wires, the spacer portion being positioned and fixed at a position separated by a predetermined distance from the tip of the injection pipe, and the wire harness inserted through the grommet being a spacer portion. A grommet waterproof structure forming jig, wherein a gap is provided between the electric wires constituting the wire harness by a spacer portion, and a filler is injected into the gap from an injection pipe.