JPH09284953A - Grommet having long cylindrical part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grommet through which wires can be inserted easily and which is easy to pack while a function blocking the penetration of rain drops, etc., is not deteriorated. SOLUTION: A grommet 12 is composed of an annular grommet main part 16 which has a wire through-hole 3 in its center, a long cylindrical part 18 which is extended from the grommet main part 16 and a constricted part 21 which is formed on the base side of the long cylindrical part 18. First, the tip edge 19 of the long cylindrical part 18 is rolled up toward the base side continuous to the main part 16 and retained by the constricted part 21. In this state, wires are inserted through the through-hole 3 and then the long cylindrical part 18 is straightened again to cover the wires over a predetermined length with the long cylindrical part 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet with a long tubular portion formed by integrally molding a long tubular portion into which a wire can be easily inserted into a grommet body.

[0002]

2. Description of the Related Art Conventionally, various grommets have been developed for protecting electric wires by attaching them to holes (not shown) for inserting electric wires formed in a case accommodating electric parts as shown in FIG. The grommet 1 shown in FIG. 4 is a so-called grommet with a long tubular portion in which the grommet body 5 and the long tubular portion 9 are integrally molded with an elastic material such as synthetic rubber. The grommet body 5 has an annular shape having an electric wire insertion hole 3 in the center, and an attachment groove 4 into which an opening edge of an electric wire insertion hole formed in a plate material such as a case is fitted on an outer peripheral portion thereof. It has a formed structure. Also,
The long tubular portion 9 has a tubular structure that covers the periphery of the electric wire 7 that is inserted into the grommet main body portion 5, and prevents the electric wire 7 from being excessively bent, or the grommet 1 is attached. It is provided on one end side of the grommet body 5 for the purpose of preventing raindrops and the like from entering the case.

However, the grommet 1 has a problem that the electric wire 7 is caught in the long cylindrical portion 9 when the electric wire 7 is inserted, and the workability is extremely poor.

Therefore, as shown in FIG. 5, an improved type has been proposed in which slits 10 are formed on both sides of the long tubular portion 9 to divide the long tubular portion 9 into vertical portions. In the grommet 1A equipped with the slit 10 as described above, when the electric wire 7 is inserted, the elongated tubular portion 9 is opened so that the width of the slit 10 is widened as shown by an arrow C in the figure, so that the substantial length is substantially increased. The electric wire insertion length can be shortened, and the electric wire 7 has a long tubular portion 9
It is possible to prevent the workability from being lowered due to being caught inside.

[0005]

However, as shown in FIG. 5, when the slit 10 for vertically dividing the long tubular portion 9 is formed, raindrops or the like enter the long tubular portion 9 through the slit 10. Therefore, there is a problem that the function of preventing raindrops and the like from entering the case in which the grommet 1A is attached is reduced to half even though the long tubular portion 9 is formed. Further, in the conventional grommets 1 and 1A shown in FIGS. 4 and 5, the long tubular portion 9 not only increases the size at the time of packaging, but also the long tubular portion 9 bends. However, if a package having a certain degree of rigidity is not used, it is difficult to pack, and there is a problem that the packing property is poor.

An object of the present invention is to solve the above problems and to facilitate insertion of electric wires without impairing the waterproof function of preventing the entry of raindrops and the like, and to provide a long-length product excellent in packing property. It is to provide a grommet with a tubular portion.

[0007]

Means for Solving the Problems The above-mentioned problems are grommet main body having an annular shape having an electric wire insertion hole in the center and an attachment groove formed in the outer peripheral portion thereof, and an electric wire inserted into the grommet main body. In a grommet with a long tubular portion that covers the periphery of a tubular shape and that includes a long tubular portion that is extended to one end side of the grommet body, the long tubular portion has a tip thereof. A constriction that can be wound in a roll shape from the edge side toward the base end side that is continuous with the grommet main body, and that holds the long tubular portion wound on the base end side of the long tubular portion in a contracted state. It can be solved by a grommet with a long tubular portion characterized by including a portion.

According to the grommet with the long tubular portion having the above structure, the long tubular portion can be rolled up in a roll shape from the tip end side thereof toward the base end side connected to the grommet main body portion. A constricted portion that holds the long tubular portion wound up on the base end side of the tubular portion in a contracted state is provided. Therefore, by winding the distal end edge of the long tubular portion to the proximal end side in a roll shape and holding it in the constricted portion, the length can be significantly shortened, and the wire can be inserted in the shortened state. When the long tubular portion is rewound after the operation, a state in which the long tubular portion covers the electric wire over a predetermined length is obtained. In addition, when packaging for shipping or the like is performed in a state where the long tubular portion is rolled up, the packaging work can be performed in a state in which the dimension at the time of packaging is small and the deformation is difficult.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a grommet with a long tubular portion according to the present invention will be described in detail below with reference to FIGS. 1 to 3. FIG. 1 is a partial cross-sectional view of a grommet with an elongated tubular portion showing an embodiment of the present invention, FIG. 2 is an operation explanatory diagram of the elongated tubular portion in FIG. It is explanatory drawing at the time of electric wire insertion work in FIG.

The grommet 12 with the long tubular portion of the present embodiment is formed by integrally molding the grommet body 16 and the long tubular portion 18 with an elastic material such as synthetic rubber. An annular shape having an electric wire insertion hole 3 in the center is formed, and an attachment groove 4 into which the peripheral edge of an electric wire insertion hole formed in a plate material such as a case is fitted is formed on the outer peripheral portion thereof. The long tubular portion 18 is the grommet body 1
6 has a tubular shape that covers the periphery of the electric wire that is inserted therethrough, and prevents the electric wire that is inserted by the long tubular portion 18 from being excessively bent from the outside, or inside the case where the grommet 12 is attached. It is intended to prevent raindrops and the like from entering.

As shown by arrows A and B in FIGS. 2 (a) and 2 (b), the elongated tubular portion 18 has a roll-shaped end portion 19 extending toward the base end side connected to the grommet main body portion 16. Elasticity and dimensions are set so that it can be rolled up. And
At the base end side of the long tubular portion 18, as shown in FIG. 2C, the long tubular portion 18 rolled up to the base end side is locked to form a long tubular shape. A constricted portion 21 is formed to hold the portion 18 in a contracted state.

In the grommet 12 of the present embodiment having the above-described structure, as shown in FIG. 2 (c), the elongated tubular portion 18 is wound up in a roll shape with the leading edge 19 being rolled up toward the proximal side, and the constricted portion is formed. The length can be significantly shortened by locking to 21. Then, as shown in FIG. 3, by inserting the electric wire 7 in a contracted state, the electric wire 7 can be easily inserted.

After the insertion of the electric wire 7 is completed, the long tubular portion 18 is rewound to obtain a state in which the long tubular portion 18 covers the electric wire 7 for a predetermined length. Since the long tubular portion 18 itself may be a simple tubular shape without a slit or the like, it does not impair the function of preventing the infiltration of raindrops or the like,
It can exhibit good waterproof performance. In addition, packaging for shipping etc. is performed by winding the long tubular portion 18 as shown in FIG.
In the state of (c), the packaging work can be performed in a state where the packaging size is small and the deformation is difficult, and the packaging property is significantly improved.

In the above-described embodiment, the long tubular portion 18 has a straight tube shape with a constant diameter, but the taper tube shape gradually expands toward the tip side so that it can be easily rolled up. May be

[0015]

As described above, according to the grommet with the long tubular portion of the present invention, the long tubular portion is formed into a roll shape from the tip edge side thereof toward the base end side connected to the grommet main body portion. It is capable of being rolled up, and has a constricted portion for holding the rolled up long tubular portion in a contracted state on the base end side of the long tubular portion. Therefore, the length of the long tubular portion can be significantly shortened by rolling up the leading edge toward the base end side in a roll shape and locking the rolled up portion at the constricted portion. By inserting the electric wire in such a contracted state, the electric wire can be easily inserted. Further, after the completion of the wire insertion work, if the long tubular portion is rewound, the long tubular portion covers the electric wire for a predetermined length, and the long tubular portion itself has no slit or the like. Since it is a simple tubular shape that does not have, it does not impair the function of preventing the entry of raindrops and the like, and can exhibit good waterproof performance.
Furthermore, when packing for shipping, etc., when the long tubular portion is rolled up, the packing size can be small and the packing work can be performed in a state where it is difficult to deform, and the packing property is significantly improved. .

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment of a grommet with a long tubular portion of the present invention.

2A and 2B are operation explanatory views of the long tubular portion in FIG. 1 during a lengthening operation, in which FIG. 2A is a partial cross-sectional view showing a state before winding the long tubular portion, and FIG. FIG. 6A is a partial cross-sectional view showing a state where the tubular portion is being wound up, and FIG. 7C is a partial cross-sectional view showing a state where the long tubular portion has been wound up.

FIG. 3 is an explanatory diagram at the time of inserting an electric wire in FIG. 2.

FIG. 4 is an explanatory diagram of a conventional grommet with a long tubular portion.

FIG. 5 is an explanatory view of another conventional grommet with a long tubular portion.

[Explanation of symbols]

 3 Wire insertion hole 4 Mounting groove 12 Grommet 16 Grommet main body 18 Long tubular part 19 Tip edge 21 Constricted part

Claims (1)

[Claims] 1. An annular shape having an electric wire insertion hole in the center,
A grommet main body portion having a mounting groove formed on its outer peripheral portion, and a long tubular portion that covers the periphery of an electric wire inserted into the grommet main body portion in a tubular shape and extends to one end side of the grommet main body portion. In a grommet with a long tubular part comprising, the long tubular part can be rolled up in a roll shape from its tip edge side toward the base end side connected to the grommet main body part, and the long tube. A grommet with a long tubular portion, comprising a constricted portion that holds the long tubular portion wound up on the base end side of the tubular portion in a contracted state.