U.S. patent application number 16/161302 was filed with the patent office on 2019-04-18 for water cut-off structure.
This patent application is currently assigned to Yazaki Corporation. The applicant listed for this patent is Yazaki Corporation. Invention is credited to Hideomi ADACHI, Toshihiro NAGASHIMA, Takeshi OGUE, Masahide TSURU, Tetsuo YAMADA, Kenta YANAZAWA, Hiroyuki YOSHIDA.
Application Number | 20190115122 16/161302 |
Document ID | / |
Family ID | 65910065 |
Filed Date | 2019-04-18 |
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United States Patent
Application |
20190115122 |
Kind Code |
A1 |
YAMADA; Tetsuo ; et
al. |
April 18, 2019 |
WATER CUT-OFF STRUCTURE
Abstract
In a water cut-off structure including: a shield electric wire
having a braid covering signal lines; an exterior member through
which the shield electric wire is inserted; and a grommet that is
arranged at an opening of an attachment member, partitions one side
and the other side of the attachment member, and has an insertion
portion through which the shield electric wire is inserted, an
exposed portion where the braid is exposed to the outside is
arranged between the insertion portion and the exterior member and
is provided with resin that is formed integrally with the exterior
member and the insertion portion and is poured into a space between
the signal lines in the braid, a space between the braid and the
signal lines, a space in the braid, a space between the braid and
the exterior member, and a space between the braid and the
insertion portion.
Inventors: |
YAMADA; Tetsuo; (Shizuoka,
JP) ; ADACHI; Hideomi; (Shizuoka, JP) ; OGUE;
Takeshi; (Shizuoka, JP) ; TSURU; Masahide;
(Shizuoka, JP) ; YOSHIDA; Hiroyuki; (Shizuoka,
JP) ; YANAZAWA; Kenta; (Shizuoka, JP) ;
NAGASHIMA; Toshihiro; (Shizuoka, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Yazaki Corporation |
Tokyo |
|
JP |
|
|
Assignee: |
Yazaki Corporation
Tokyo
JP
|
Family ID: |
65910065 |
Appl. No.: |
16/161302 |
Filed: |
October 16, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H01B 17/583 20130101;
H01B 7/2825 20130101; H02G 3/22 20130101; H02G 3/088 20130101; H01R
13/5216 20130101 |
International
Class: |
H01B 7/282 20060101
H01B007/282; H01B 17/58 20060101 H01B017/58; H01R 13/52 20060101
H01R013/52 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 18, 2017 |
JP |
2017-201518 |
Claims
1. A water cut-off structure comprising: a shield electric wire
having a braid covering a plurality of signal lines; an exterior
member through which the shield electric wire is inserted; a
grommet that is arranged at an opening of an attachment member,
partitions one side and the other side of the attachment member
from each other, and has an insertion portion through which the
shield electric wire is inserted; an exposed portion, which is
arranged between the insertion portion and the exterior member and
where the braid is exposed to an outside; and resin that is
provided at the exposed portion, is formed integrally with the
exterior member and the insertion portion, and is poured to a space
between the plurality of signal lines in the braid, a space between
the braid and the plurality of signal lines, a space in the braid,
a space between the braid and the exterior member, and a space
between the braid and the insertion portion.
2. The water cut-off structure according to claim 1, wherein the
exterior member is arranged on each of the one side and the other
side of the attachment member, the exposed portion is arranged
between the insertion portion and each of the exterior member on
the one side and the other side, and the resin is provided at each
of the exposed portions on one side and the other side.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims priority to Japanese Patent
Application No. 2017-201518 filed on Oct. 18, 2017, the entire
contents of which are incorporated by reference herein.
BACKGROUND
Technical Field
[0002] The present invention relates to a water cut-off structure.
More specifically, the present invention relates to a water cut-off
structure between an exterior member through which a shield
electric wire is inserted, and a grommet through which a shield
electric wire is inserted.
Related Art
[0003] Conventionally, there is a known water cut-off structure
provided with: a plurality of electric wires; an exterior member
through which the electric wires are inserted; and a grommet, which
is arranged at an opening of a panel functioning as an attachment
member, partitions one side and the other side of the panel from
each other, and is formed integrally with an outer circumference of
the exterior member (see, for example, JP 2016-25750 A).
[0004] In such a water cut-off structure, a small diameter portion
having an outer diameter smaller than other portions is provided in
a part of the exterior member in a longitudinal direction, and a
resin material constituting the grommet is integrally molded at the
small diameter portion.
SUMMARY
[0005] In a water cut-off structure such as the structure disclosed
in JP 2016-25750 A, the inside of an exterior member through which
a grommet is inserted is not water-tight, and there is a
possibility that water or the like enters into the inside of an
attachment member along electric wires inserted through the inside
of the exterior member.
[0006] Therefore, an object of the present invention is to provide
a water cut-off structure capable of improving water cut-off
performance.
[0007] An aspect of the present invention is a water cut-off
structure having: a shield electric wire having a braid covering a
plurality of signal lines; an exterior member through which the
shield electric wire is inserted; a grommet that is arranged at an
opening of an attachment member, partitions one side and the other
side of the attachment member from each other, and has an insertion
portion through which the shield electric wire is inserted; an
exposed portion, which is arranged between the insertion portion
and the exterior member and where the braid is exposed to the
outside; and resin that is provided at the exposed portion, is
formed integrally with the exterior member and the insertion
portion, and is poured to a space between the plurality of signal
lines in the braid, a space between the braid and the plurality of
signal lines, a space in the braid, a space between the braid and
the exterior member, and a space between the braid and the
insertion portion.
[0008] The exterior member may be arranged on each of the one side
and the other side of the attachment member. The exposed portion
may be arranged between the insertion portion and each of the
exterior member on the one side and the exterior member on the
other side. The resin may be provided at each of the exposed
portion on the one side and the exposed portion on the other
side.
[0009] With the present invention, it is possible to provide a
water cut-off structure capable of improving water cut-off
performance.
BRIEF DESCRIPTION OF DRAWINGS
[0010] FIG. 1 is a side view illustrating a part of a water cut-off
structure according to an embodiment of the present invention as a
cross section;
[0011] FIG. 2 is a sectional view taken along line X-X of FIG. 1;
and
[0012] FIG. 3 is a sectional view taken along line Y-Y of FIG.
1.
DETAILED DESCRIPTION
[0013] A water cut-off structure according to an embodiment of the
present invention will be described with reference to FIGS. 1 to
3.
[0014] A water cut-off structure 1 according to this embodiment is
provided with: a shield electric wire 7 having a braid 5 covering a
plurality of signal lines 3; an exterior member 9 through which the
shield electric wire 7 is inserted; and a grommet 17 that is
arranged at an opening 13 of an attachment member 11, sections one
side and the other side of the attachment member 11 from each
other, and has an insertion portion 15 through which the shield
electric wire 7 is inserted.
[0015] Moreover, an exposed portion 19 where the braid 5 is exposed
to the outside is arranged between the insertion portion 15 and the
exterior member 9.
[0016] In addition, the exposed portion 19 is provided with resin
21 that is formed integrally with the exterior member 9 and the
insertion portion 15 and is poured into a space between the
plurality of signal lines 3 in the braid 5, a space between the
braid 5 and the plurality of signal lines 3, a space in the braid
5, a space between the braid 5 and the exterior member 9, and a
space between the braid 5 and the insertion portion 15.
[0017] Moreover, the exterior member 9 is arranged on each of the
one side and the other side of the attachment member 11, and the
exposed portions 19, 19 are arranged respectively between the
insertion portion 15 and the exterior members 9, 9 on the one side
and the other side.
[0018] In addition, resin 21, 21 is provided respectively at the
exposed portions 19, 19 on the one side and the other side.
[0019] As illustrated in FIGS. 1 to 3, the shield electric wire 7
is provided with a plurality of (two in this case) signal lines 3
and a braid 5.
[0020] The plurality of signal lines 3 are arranged between
apparatuses (not illustrated) or between an apparatus and a power
source (not illustrated), and both end sides of the signal lines
are respectively connected electrically with an apparatus, a power
source, or the like.
[0021] An outer circumference of the plurality of signal lines 3 is
covered with the braid 5.
[0022] The braid 5 is formed by weaving a plurality of thin
electrically conductive materials and covers the outer
circumference of the plurality of signal lines 3, and one end of
the braid 5 is grounded via a vehicle body (not illustrated) to
form a shield circuit.
[0023] By covering the outer circumference of the plurality of
signal lines 3 with such a braid 5, it is possible to prevent
entering of noise or the like into the signal lines 3, or
occurrence of noise or the like from the signal lines 3.
[0024] Such a shield electric wire 7 is inserted through the inside
of the exterior member 9, and the outer circumference of the shield
electric wire 7 is protected by the exterior member 9.
[0025] The exterior member 9 includes an insulating material such
as synthetic resin, is formed in a cylindrical shape such that the
plurality of signal lines 3 can be inserted through the inside of
the exterior member 9, and is constituted of a protective member
such as a corrugate tube that prevents the signal lines 3 from
interfering with peripheral members.
[0026] The shield electric wire 7 with the outer circumference
covered with the exterior member 9 is inserted through the opening
13 of the attachment member 11 and is arranged on one side and the
other side of the attachment member 11.
[0027] The attachment member 11 has, for example, a wall portion
such as a panel that partitions a cabin as one side and the outside
of a cabin as the other side from each other, and the wall portion
is provided with the opening 13 through which the shield electric
wire 7 is inserted.
[0028] The grommet 17 functioning as a seal member for partitioning
one side and the other side from each other is arranged at the
opening 13 of the attachment member 11.
[0029] The grommet 17 includes an elastic material such as rubber
and is provided with a close contact portion 23 and the insertion
portion 15.
[0030] The close contact portion 23 is formed in a flange shape and
is provided with a groove portion 25 which can be engaged with an
edge portion of the opening 13 of the attachment member 11 over the
outer circumference in a circumferential direction.
[0031] The groove portion 25 of the close contact portion 23 is
engaged in close contact with the edge portion of the opening 13,
so as to prevent water or the like from entering through the
opening 13 of the attachment member 11.
[0032] The insertion portion 15 is formed of a member continuous
with the close contact portion 23 and is extended in a cylindrical
shape toward one side and the other side of the attachment member
11 such that the shield electric wire 7 can be inserted through a
center portion of the grommet 17.
[0033] In the state where the shield electric wire 7 is inserted,
an inner circumferential surface of the insertion portion 15 is
arranged in close contact with the outer circumference of the
shield electric wire 7, so as to prevent water or the like from
entering from one side to the other side, or from the other side to
one side of the attachment member 11 along the shield electric wire
7.
[0034] However, since the braid 5 is arranged on the outer
circumference of the shield electric wire 7, even if the inner
circumferential surface of the insertion portion 15 is in close
contact with the braid 5, a gap is formed by stitches of the braid
5, and it is difficult to inhibit entering of water or the like
only with close contact by the insertion portion 15.
[0035] Therefore, the exterior members 9, 9 are arranged
respectively on one side and the other side of the attachment
member 11 in a longitudinal direction of the shield electric wire
7, and exposed portions 19, 19 where the braid 5 of the shield
electric wire 7 is exposed to the outside are provided respectively
between the exterior members 9, 9 and the insertion portion 15.
[0036] In the exposed portions 19, 19, resin 21, 21 is each
integrally molded over a part of the exterior member 9 and a part
of the insertion portion 15.
[0037] By molding the resin 21, 21 at the exposed portions 19, 19,
molten resin flows respectively into a space between the plurality
of signal lines 3 in the braid 5, a space between the braid 5 and
the plurality of signal lines 3, a space in the braid 5, a space
between the braid 5 and the exterior member 9, and a space between
the braid 5 and the insertion portion 15, and is solidified in a
state where all gaps are filled.
[0038] Therefore, even if water or the like enters into the
exterior members 9, 9 on one side and the other side along the
shield electric wire 7, the resin 21, 21 located at the exposed
portions 19, 19 can reliably prevent further entering of the water
or the like, and therefore the water or the like does not reach the
insertion portion 15.
[0039] It is to be noted that any resin may be employed as the
resin 21 as long as the resin solidifies and retains the shape
after being melted.
[0040] Since any resin can be employed as the resin 21 as long as
the resin can be molded at the exposed portion 19, it is possible
to apply the resin to a general exterior member 9 or a general
grommet 17 without using a dedicated exterior member or a dedicated
grommet having a special shape, and therefore versatility can be
improved.
[0041] In such a water cut-off structure 1, the exposed portion 19
is provided with resin 21, which is formed integrally with the
exterior member 9 and the insertion portion 15 and is poured into a
space between the plurality of signal lines 3 in the braid 5, a
space between the braid 5 and the plurality of signal lines 3, a
space in the braid 5, a space between the braid 5 and the exterior
member 9, and a space between the braid 5 and the insertion portion
15, and therefore the resin 21 can inhibit water of the like from
entering into the inside of the attachment member 11 along the
shield electric wire 7 inside the exterior member 9.
[0042] Accordingly, with such a water cut-off structure 1 in which
all gaps of the exposed portion 19 are filled with the resin 21, it
is possible to reliably prevent entering of water or the like, and
it is possible to improve water cut-off performance.
[0043] Moreover, since the resin 21, 21 is provided respectively at
the exposed portions 19, 19 on one side and the other side, it is
possible to prevent water or the like from entering from either the
one side or the other side of the attachment member 11, and it is
possible to further improve the water cut-off performance.
[0044] Although exposed portions are provided respectively on one
side and the other side of an attachment member and resin is
provided at each exposed portion in a water cut-off structure
according to an embodiment of the present invention, the present
invention is not limited to this. An exposed portion may be
provided only on one side having a high possibility that water or
the like enters, and resin may be provided at the exposed
portion.
* * * * *