JPS6144344Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a waterproof grommet suitably used for electrical wiring in automobiles and the like.

Waterproof grommets are used to bundle and protect the wire harness when the wire harness is routed through the panel of the chassis or body of an automobile, and are generally made of an elastic material such as rubber. It is manufactured in the following manner and has the structure as shown in Fig. 4.

That is, reference numeral 21 denotes a waterproof grommet made of rubber, and is constructed by providing a wire harness insertion tube 23 at the top of a bowl-shaped protector 22 and a collar 24 at the upper end of the tube 23.

When in use, an opening jig is inserted into the insertion tube 23 to enlarge its diameter, the wire harness is passed through, the collar 24 is crushed, and the tube is fitted into the mounting hole of the panel.

In this way, in order to pass the wire harness through the waterproof grommet, it is necessary to use an opening jig each time, and when installing it to the panel, unreasonable force is applied to the collar 24, which requires a great deal of effort to attach other wires. There is a risk of damaging the harness itself.

This invention was made with attention to the above-mentioned points, and the purpose is to provide a split-type waterproof grommet that allows easy attachment of a wire harness and extremely easy attachment to a panel section.

This invention will be explained below with reference to the drawings. A is a waterproof grommet made of synthetic resin, which is formed by substantially symmetrical semi-cylindrical bodies 1 and 1' connected to each other so as to be openable and closable.

The semi-cylindrical body 1, 1' has a large-diameter part 2 at the top and a small-diameter part 3 at the bottom, and has a flange provided between the large-diameter part 2 and the small-diameter part 3 of the side walls 4, 4'. One end of 5 is connected via a hinge 6 so as to be openable and closable.

Reference numeral 7 designates a lid portion formed at the upper end of the large diameter portion 2 of the semi-cylindrical body 1, 1', and has a through hole 8 for the wire harness, and a flexible hole 8 for the through hole in the panel is provided on the lower surface of the lid portion 7. Check members 9, 9 are provided protrudingly. Further, a thread groove 10 for a corrugated pipe that protects the wire harness is provided in the lower inner wall of the small diameter portion 3.

On the other hand, a seal mounting groove 11 and a protrusion 12 for pressing the seal are provided along the opposing surfaces of the half cylinders 1, 1', that is, the end surfaces 4a, 4a' of the side walls 4, 4'.
Further, 13 is a locking pawl, and 14 is a locking member having a locking hole for the locking pawl 13. The locking pawl 13 includes the flange portion 5 of the half-cylindrical body 1' and the end surface 4a' of the small diameter portion 3. Also, the locking member 14 is provided on the end surface 4a side of the half cylinder 1.

Next, how to use it will be explained.

First, a gasket (not shown) is inserted into the gasket mounting groove 11, and as shown in FIG. 2, the corrugated pipe 15 through which the wire harness 16 is inserted is applied to either the half-cylindrical body 1 or the half-cylindrical body 1'. When the other half is closed, the half cylinders 1, 1' are locked by the locking pawl 13 and the locking member 14, and the end surfaces of the half cylinders 1, 1' are sealed and waterproof by the protrusion 12 that presses the packing. Ru.

Moreover, since the corrugated pipe 15 engages with the thread groove 10 on the inner wall of the lower part of the half cylinders 1, 1', it is securely clamped and there is no fear of it coming off in the vertical direction.

Next, after inserting the annular gasket 17 into the stepped portion 5a provided on the periphery of the upper surface of the flange portion 5, the lid portion 7 of the waterproof grommet A is inserted into the mounting hole 19 of the panel 18.

At this time, the check member 9 on the lower surface of the lid 7 is attached to the mounting hole 1.
Although it is inscribed in the panel 9, since it is flexible, it bends inward and is easily inserted, and the flange 5 comes into contact with the panel 18. Then, the check member 9 expands again, and the protrusion 9a provided on the lower surface of the check member 9 is inscribed in the attachment hole 19.

As a result, the waterproof grommet A is irremovably fitted to the panel 18 by the collar 5 and the check member 9, but an elastic spacer 20 is interposed between the panel 18 and the check member 9. This makes it possible to more completely waterproof the swinging of the waterproof grommet A.

Conversely, in order to remove the waterproof grommet A from the panel 18, the spacer 20 is pulled out, the check member 9 is pressed in the radial direction to reduce its diameter, and then pushed out in the direction of the arrow B.

As explained above, this invention consists of two semi-cylindrical bodies, with a lid having a wire harness insertion hole at the upper end and a flange on the intermediate circumferential wall. It is a split type waterproof grommet connected via one end so that it can be opened and closed, and the wire harness and the corrugated pipe through which it can be inserted are held between two half-cylindrical bodies, so that it can be installed easily. It is extremely simple, and sufficient waterproofness can be obtained by the annular packing positioned at the stepped portion.

Furthermore, since locking members are provided on the opposing surfaces of the side walls of both half cylinders, wire harnesses and the like can be easily attached and detached by opening and closing both half cylinders.

Furthermore, a check member is provided on the lower surface of the lid, and the check member and the flange are configured to fit into the mounting hole of a panel, etc., so unlike conventional rubber waterproof grommets, wire It can be easily installed and removed without damaging the harness.

[Brief explanation of the drawing]

The drawings show an embodiment of the waterproof grommet according to this invention, and FIG. 1 is a front view of the waterproof grommet in its open state;
FIG. 2 is a perspective view of the device in use, FIG. 3 is a side view of the device fitted into a panel, and FIG. 4 is an explanatory diagram of a conventional example. 1, 1'...half cylinder body, 5...flange part, 7...lid part, 8...through hole, 9...return member.

Claims (1)

[Scope of utility model registration request] Consisting of two half-cylindrical bodies each having a lid portion having a wire harness passage hole at the upper end and a flange portion on the middle peripheral wall, the two half-cylindrical bodies can be opened and closed via one end of the flange portion. A locking member is provided on the opposing surfaces of the side walls of both half cylinders, a screw groove is formed in the inner wall of both half cylinders, a flexible check member is provided on the lower surface of the lid, and the check member is provided on the lower surface of the lid. A synthetic resin that is fitted and fixed into a mounting hole of a panel, etc. by the member and the flange, and at that time, an annular packing attached to a stepped portion at the periphery of the flange comes into pressure contact with the panel, etc. Made of waterproof grommets.