U.S. patent application number 14/379156 was filed with the patent office on 2015-02-26 for sheet for wire harness, wire harness, and production method for wire harness.
This patent application is currently assigned to Yazaki Corporation. The applicant listed for this patent is Yazaki Corporation. Invention is credited to Kenichiro Kawaguchi, Mitsunori Tsunoda.
Application Number | 20150053478 14/379156 |
Document ID | / |
Family ID | 48984332 |
Filed Date | 2015-02-26 |
United States Patent
Application |
20150053478 |
Kind Code |
A1 |
Kawaguchi; Kenichiro ; et
al. |
February 26, 2015 |
SHEET FOR WIRE HARNESS, WIRE HARNESS, AND PRODUCTION METHOD FOR
WIRE HARNESS
Abstract
Provided is a wire harness sheet that can be stored in an
overlapping manner without using release paper and can be wound in
a spiral shape around an electric wire bundle. A wire harness sheet
11 includes a first self-adhesive layer 15 of a sheet base material
13, the first self-adhesive layer 15 being is formed on one surface
of a first common region 27, and the other surface of the first
common region 27 becoming a first adhesive layer unformed portion
29; and a second self-adhesive layer 17 that is formed on at least
part of one surface of a second common region 31.
Inventors: |
Kawaguchi; Kenichiro;
(Susono-shi, JP) ; Tsunoda; Mitsunori;
(Toyota-shi, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Yazaki Corporation |
Tokyo |
|
JP |
|
|
Assignee: |
Yazaki Corporation
Tokyo
JP
|
Family ID: |
48984332 |
Appl. No.: |
14/379156 |
Filed: |
February 15, 2013 |
PCT Filed: |
February 15, 2013 |
PCT NO: |
PCT/JP2013/053740 |
371 Date: |
August 15, 2014 |
Current U.S.
Class: |
174/72A ;
156/185; 428/354 |
Current CPC
Class: |
H01B 13/012 20130101;
C09J 2301/204 20200801; C09J 2301/124 20200801; H01B 7/0045
20130101; B60R 16/0207 20130101; H01B 13/01272 20130101; C09J 7/20
20180101; H02G 3/0481 20130101; H01B 13/01263 20130101; Y10T
428/2848 20150115; H02G 3/0487 20130101; H02G 3/0406 20130101; B60R
16/0215 20130101; C09J 7/38 20180101; C09J 2203/302 20130101 |
Class at
Publication: |
174/72.A ;
156/185; 428/354 |
International
Class: |
H01B 13/012 20060101
H01B013/012; C09J 7/02 20060101 C09J007/02; H02G 3/04 20060101
H02G003/04; H01B 7/00 20060101 H01B007/00 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 16, 2012 |
JP |
2012-032015 |
Claims
1. A sheet for a wire harness comprising: a sheet base material; a
first self-adhesive layer formed on one surface in a first common
region of the sheet base material, wherein top and back surfaces of
the sheet base material in the first common region exactly overlap
each other when the sheet base material is viewed through from top,
and the other surface in the first common region is a first
adhesive layer unformed portion; and a second self-adhesive layer
formed on at least part of one surface in a second common region of
the sheet base material, wherein top and back surfaces of the sheet
material in the second common region exactly overlap each other
when the sheet base material is viewed through from top, and the
first self-adhesive layer is not formed in the second common
region.
2. The sheet for the wire harness according to the claim 1, wherein
when the sheet base material is viewed through from top, a gap is
provided between the first self-adhesive layer and the second
self-adhesive layer.
3. A wire harness comprising: a sheet base material; a first
self-adhesive layer formed on one surface in a first common region
of the sheet base material, wherein top and back surfaces of the
sheet base material in the first common region exactly overlap each
other when the sheet base material is viewed through from top, and
the other surface in the first common region is a first adhesive
layer unformed portion; a second self-adhesive layer formed on at
least part of one surface in a second common region of the sheet
base material, wherein top and back surfaces of the sheet base
material in the second common region exactly overlap each other
when the sheet base material is viewed through from top, and the
first self-adhesive layer is not formed in the second common
region; and an electric wire bundle, wherein the sheet base
material is wound around the electric wire bundle, the winding
starts from one end of the sheet base material in a direction in
which the first self-adhesive layer and second self-adhesive layer
are aligned, and the sheet base material is adhesively fixed to
itself at a winding end by the first self-adhesive layer and second
self-adhesive layer facing each other.
4. A production method for a wire harness in which a sheet for the
wire harness is used, the sheet for the wire harness including: a
sheet base material; a first self-adhesive layer formed on one
surface in a first common region of the sheet base material,
wherein top and back surfaces of the sheet base material in the
first common region exactly overlap each other when the sheet base
material is viewed through from top, and the other surface in the
first common region is a first adhesive layer unformed portion; and
a second self-adhesive layer formed on at least part of one surface
in a second common region of the sheet base material, wherein top
and back surfaces of the sheet base material in the second common
region exactly overlap each other when the sheet base material is
viewed through from top, and the first self-adhesive layer is not
formed in the second common region, the method comprising: a step
of winding the wire harness sheet around an electric wire bundle
from a winding start base point which is in the first adhesive
layer unformed portion or a second adhesive layer unformed portion
which is on a back side of the second self-adhesive layer.
Description
TECHNICAL FIELD
[0001] The present invention relates to a sheet for wire harness
sheet, a wire harness, and a production method for the wire
harness.
BACKGROUND ART
[0002] In many cases, a tape is wound around a wire harness
including a large number of electric wire bundles wired in a
vehicle, so as to bundle and protect the electric wire bundles. In
recent years, the tape wrapping is not used for the reduction of
working man-hours. A sheet which is bonded to itself for the
bundling and protection of the electric wire bundles at once is
increasingly used (refer to PTL 1).
[0003] An adhesive layer is formed on only one surface of the wire
harness sheet. The electric wire bundle is protected by peeling
release paper off the wire harness sheet, by setting the electric
wire bundle at a designated position on the wire harness sheet, and
by bonding together adhesive surfaces.
[0004] A self-adhesive sheet is known as the wire harness sheet,
and is bonded to itself when the adhesive surfaces are merely
joined together. The self-adhesive wire harness sheets can overlap
each other without using the release paper, and the self-adhesive
wire harness sheet is not bonded to the electric wire bundles.
Accordingly, the self-adhesive wire harness sheet has attracted
attention in that the self-adhesive wire harness sheet has good
handling properties, workability, and environmental protection.
CITATION LIST
Patent Literature
[0005] [PTL 1] JP-A-11-7856
SUMMARY OF INVENTION
Technical Problem
[0006] However, as illustrated in FIG. 8, in a self-adhesive sheet
505 in which a self adhesive 503 is provided on only one surface of
a sheet base material 501, when the adhesive surfaces are not
joined together, it is possible to bond the self-adhesive sheet 505
to itself. Accordingly, the self-adhesive sheet 505 cannot be
applied to a wire harness 509, in which the sheet base material is
wound in a spiral shape around an electric wire bundle 507 as
illustrated in FIG. 8.
[0007] In contrast, as illustrated in FIG. 9, when end edge
portions are bonded together, it is possible to use the
self-adhesive sheet 505 in the wire harness 509. However, it is not
possible to use the self-adhesive sheet 505 in a routing portion in
which a joining margin 511 is not allowed to protrude.
[0008] A double-sided self-adhesive sheet (not illustrated) having
the self adhesives 503 on both surfaces can be wound in a spiral
shape as illustrated in FIG. 8 so as to solve the above-mentioned
problems. However, there is a problem in that the double-sided
self-adhesive sheet cannot be stored in a rolled up manner or an
overlapping manner, and merits of the self-adhesive sheet cannot be
utilized.
[0009] The present invention is made in light of the problems, and
an object of the present invention is to provide a wire harness
sheet, a wire harness and a production method for the wire harness,
in which the wire harness sheet can be stored in an overlapping
manner without using release paper and can be wound in a spiral
shape around an electric wire bundle.
Solution to Problem
[0010] The object of the present invention is achieved with the
following configurations.
[0011] (1) A sheet for a wire harness comprising:
[0012] a sheet base material;
[0013] a first self-adhesive layer formed on one surface in a first
common region of the sheet base material, wherein top and back
surfaces of the sheet base material in the first common region
exactly overlap each other when the sheet base material is viewed
through from top, and the other surface in the first common region
is a first adhesive layer unformed portion; and
[0014] a second self-adhesive layer formed on at least part of one
surface in a second common region of the sheet base material,
wherein top and back surfaces of the sheet material in the second
common region exactly overlap each other when the sheet base
material is viewed through from top, and the first self-adhesive
layer is not formed in the second common region.
[0015] In the wire harness sheet with the configuration (1), the
first and second self-adhesive layers are respectively provided on
the back and top surfaces of the sheet base material. However, the
first and second self-adhesive layers are respectively provided in
the first and second common regions, the top and back surfaces of
which exactly overlap each other when the sheet base material is
viewed through from above, and which are located in different
positions. Accordingly, even when a plurality of the wire harness
sheets are stored in an overlapping manner in such a manner that
the contours of the wire harness sheets are aligned with each
other, respective self adhesives of the self-adhesive sheets
vertically overlapping each other do not come into contact with
each other, and are not adhesively fixed together.
[0016] Since the first and second self-adhesive layers are
respectively positioned on the back and top surfaces of the
self-adhesive sheet, it is possible to adhesively fix together
respective overlapping portions of the first and second
self-adhesive layers at a winding end point. In addition, the
self-adhesive sheet can be wound in a spiral shape.
[0017] (2) The sheet for the wire harness according to the
configuration (1), wherein
[0018] when the sheet base material is viewed through from top, a
gap is provided between the first self-adhesive layer and the
second self-adhesive layer.
[0019] In the wire harness sheet with the configuration (2), when
the sheet base material is viewed through from above, the gap is
formed between the first and second self-adhesive layers.
Accordingly, in a state where the respective contours of the
plurality of sheet base materials stored in an overlapping manner
are not aligned with each other, and deviate from each other, when
the amount of deviation lies in the gap, the self adhesives of the
sheet base materials vertically overlapping each other do not come
into contact with each other, thereby being not adhesively fixed
together. That is, it is possible to easily store the wire harness
sheets in an overlapping up manner by allowing a certain amount of
deviation during the overlapping of the wire harness sheets.
[0020] (3) A wire harness comprising:
[0021] a sheet base material;
[0022] a first self-adhesive layer formed on one surface in a first
common region of the sheet base material, wherein top and back
surfaces of the sheet base material in the first common region
exactly overlap each other when the sheet base material is viewed
through from top, and the other surface in the first common region
is a first adhesive layer unformed portion;
[0023] a second self-adhesive layer formed on at least part of one
surface in a second common region of the sheet base material,
wherein top and back surfaces of the sheet base material in the
second common region exactly overlap each other when the sheet base
material is viewed through from top, and the first self-adhesive
layer is not formed in the second common region; and
[0024] an electric wire bundle, wherein
[0025] the sheet base material is wound around the electric wire
bundle, the winding starts from one end of the sheet base material
in a direction in which the first self-adhesive layer and second
self-adhesive layer are aligned, and the sheet base material is
adhesively fixed to itself at a winding end by the first
self-adhesive layer and second self-adhesive layer facing each
other.
[0026] In the wire harness sheet with the configuration (3), the
self-adhesive sheet without using the release paper, being very
easy to work with and very easy to store, can be wound in a spiral
shape around the electric wire bundle.
[0027] Since the sheet base material can be wound in a spiral shape
in such a manner that the self adhesive is not exposed to an outer
circumferential surface of the wire harness, it is possible to
prevent the wire harness from being adhesively fixed to the sheet
base material.
[0028] (4) A production method for a wire harness in which a sheet
for the wire harness is used,
[0029] the sheet for the wire harness including:
[0030] a sheet base material;
[0031] a first self-adhesive layer formed on one surface in a first
common region of the sheet base material, wherein top and back
surfaces of the sheet base material in the first common region
exactly overlap each other when the sheet base material is viewed
through from top, and the other surface in the first common region
is a first adhesive layer unformed portion; and
[0032] a second self-adhesive layer formed on at least part of one
surface in a second common region of the sheet base material,
wherein top and back surfaces of the sheet base material in the
second common region exactly overlap each other when the sheet base
material is viewed through from top, and the first self-adhesive
layer is not formed in the second common region,
[0033] the method comprising:
[0034] a step of winding the wire harness sheet around an electric
wire bundle from a winding start base point which is in the first
adhesive layer unformed portion or a second adhesive layer unformed
portion which is on a back side of the second self-adhesive
layer.
[0035] In the production method for the wire harness with the
configuration (4), the wire harness sheet without using the release
paper can be used. Accordingly, it is not necessary to peel the
release paper off the wire harness sheet, and the storage
properties, handling properties, and workability of the wire
harness sheet improve.
[0036] The wire harness sheet can be environment-friendly since the
release paper is not required. Since the electric wire bundle is
protected, but is not adhesively fixed to the self adhesive, the
position of the electric wire bundle is easily corrected, and the
quality of the wire harness improves. The wire harness sheet is
wound around the electric wire bundle, having the first or second
adhesive layer unformed portion as the winding start base point.
Accordingly, the self-adhesive sheet can be wound in a spiral shape
around the electric wire bundle. When the length of the first
self-adhesive layer is different from that of the second
self-adhesive layer in the parallel direction, the wire harness
sheet can be wound around the wire harness in different patterns by
setting the first or second adhesive layer unformed portion to the
winding start base point.
[0037] For example, in the wire harness sheet, the width of the
first self-adhesive layer is set to be smaller than that of the
second self-adhesive layer. When the wire harness sheet is wound
around the electric wire bundle, having the first adhesive layer
unformed portion as the winding start base point, the wire harness
sheet can be wound in a spiral shape in such a manner that the
second self-adhesive layer is not exposed on the outer
circumference. At this time, the adhesive fixing of the first
self-adhesive layer and the second self-adhesive layer is performed
only in a single winding.
[0038] In contrast, when the wire harness sheet is wound around the
electric wire bundle, having the second adhesive layer unformed
portion as the winding start base point, the wire harness sheet can
be wound in a spiral shape in such a manner that the second
self-adhesive layer is exposed on the outer circumference. At this
time, since the first self-adhesive layer is exposed to the outside
at the winding end point, the adhesive fixing of the wire harness
sheet to itself can be performed by using multiple-layer
winding.
[0039] The present invention has been simply described above. When
forms for the implementation of the present invention (hereinafter,
referred to as an "embodiment"), which will be described later, are
read through with reference to the accompanying drawings, the
details of the present invention will become further apparent.
BRIEF DESCRIPTION OF DRAWINGS
[0040] FIG. 1(a) is a plan view of a wire harness sheet according
to a first embodiment of the present invention, and FIG. 1(b) is a
side view of FIG. 1(a).
[0041] FIG. 2(a) is a plan view describing a winding start phase in
which the wire harness sheet illustrated in FIG. 1(a) is wound
around an electric wire bundle, having a second self-adhesive layer
as a winding start base point. FIG. 2(b) is a plane view describing
a winding end phase.
[0042] FIG. 3 is a cross-sectional view taken along line III-Ill in
FIG. 2(b).
[0043] FIG. 4(a) is a plan view describing a winding start phase in
which the wire harness sheet illustrated in FIG. 1(a) is wound
around the electric wire bundle, having a first adhesive layer
unformed portion as the winding start base point. FIG. 4(b) is a
plane view describing the winding end phase.
[0044] FIG. 5 is a cross-sectional view taken along line V-V in
FIG. 4(b).
[0045] FIG. 6(a) is a plan view describing a winding start phase in
which the wire harness sheet illustrated in FIGS. 1(a) and 1(b) is
wound around the electric wire bundle, having a second adhesive
layer unformed portion as the winding start base point. FIG. 6(b)
is a plane view describing the winding end phase.
[0046] FIG. 7 is a cross-sectional view taken along line VII-VII in
FIG. 6(b).
[0047] FIG. 8 is a cross-sectional view of a wire harness in which
a wire harness sheet of the related art includes a self adhesive on
only one surface thereof, and is wound in a spiral shape around the
electric wire bundle.
[0048] FIG. 9 is a cross-sectional of the wire harness in which the
electric wire bundle is protected by bonding together end edge
portions of the wire harness sheet of the related art including the
self adhesive on only one surface thereof.
DESCRIPTION OF EMBODIMENTS
[0049] Hereinafter, embodiments of the present invention will be
described with reference to the accompanying drawings.
[0050] As illustrated in FIGS. 1(a) and 1(b), a wire harness sheet
11 according to a first embodiment is configured to include a sheet
base material 13, a first self-adhesive layer 15, and a second
self-adhesive layer 17.
[0051] The sheet base material 13 of the wire harness sheet 11 has
a rectangular shape that is formed by a pair of first side portion
19 and second side portion 21 in parallel with each other, and by a
third side portion 23 and a fourth side portion 25 orthogonal to
the first side portion 19 and the second side portion 21. The sheet
base material 13 can be made of plastic materials, for example,
polyolefin resin such as well-known polyethylene and polypropylene,
polyurethane resin, polystyrene resin, acrylic resin, polyvinyl
chloride resin, and polycarbonate resin.
[0052] The first self-adhesive layer 15 is formed on one surface
(an upper side in FIG. 1(b)) of a first common region 27, top and
back surfaces of which exactly overlap each other when the sheet
base material 13 is viewed through from above, and the other
surface (a lower side in FIG. 1(b)) of the first common region 27
becomes a first adhesive layer unformed portion 29. That is, one
surface of the first common region 27 becomes the first
non-adhesive formation portion 29, and the other surface becomes
the first self-adhesive layer 15. A second self-adhesive layer 17
is formed on at least part of one surface of a second common region
31, top and back surfaces of which exactly overlap each other when
the sheet base material 13 is viewed through from above, and in
which the first self-adhesive layer 15 is not formed. That the
second self-adhesive layer 17 is formed on at least part of one
surface indicates that the second self-adhesive layer 17 may be
formed on the entirety of one surface of the second common region
31. In the embodiment, when the sheet base material 13 is viewed
through from above, a gap 33 is provided between the first
self-adhesive layer 15 and the second self-adhesive layer 17. That
is, in the embodiment, the second self-adhesive layer 17 is formed
on at least the part of one surface of the second common region
31.
[0053] When the sheet base material 13 is viewed through from
above, the gap 33 is formed between the first self-adhesive layer
15 and the second self-adhesive layer 17 of the wire harness sheet
11. Accordingly, in a state where the respective contours of a
plurality of the wire harness sheets 11 stored in an overlapping
manner are not aligned with each other, and deviate from each
other, when the amount of deviation lies in the gap 33, respective
self adhesives of the sheet base materials 13 vertically
overlapping each other do not come into contact with each other,
thereby being not adhesively fixed together. As a result, it is
possible to easily store the wire harness sheets 11 in an
overlapping manner by allowing a certain amount of deviation during
the overlapping of the wire harness sheets 11.
[0054] The wire harness sheet 11 is a self-adhesive sheet that can
be bonded to itself only when the first self-adhesive layer 15 and
the second self-adhesive layer 17 formed on the sheet base material
13 are joined together. A paste or a binding tape is not required,
and it is possible to simply bond the wire harness sheet 11 to
itself only by joining together the adhesive surfaces. Furthermore,
the first self-adhesive layer 15 and the second self-adhesive layer
17 of the wire harness sheet 11 are special adhesive layers that
prevent an electric wire bundle 39 or the operator's hands from
bonding thereto, and thus the efficiency of assembly work does not
deteriorate. A surface material is laminated on surfaces of the
wire harness sheet 11, which respectively become the first adhesive
layer unformed portion 29 and a second adhesive layer unformed
portion 45 of the sheet base material 13 made of a polypropylene
(PP) form material, and the special adhesive layers (the first
self-adhesive layer 15 and the second self-adhesive layer 17) are
laminated on the other surfaces of the wire harness sheet 11. The
following materials can be used as the surface material: kraft
paper, a linerboard, a polyethylene-telephthalate (PET) film, a PP
film, a non-woven fabric, and the like. The surface material has
longitudinal tensile strength of 49 N/cm width, and a lateral
tensile strength of 23 N/cm width (per JIS K-6767). The surface
material has longitudinal internal tearing strength of 7.8 N, and
lateral internal tearing strength of 6.8 N (JIS K-6767). The
surface material has a moisture vapor transmission rate of 0.0052
g/cm.sup.224 hrs (FS-101B), and has an initial adhesive force of
2.5 N/cm width (per a T-type peeling test). For example, it is
possible to use Cro-nel (a trademark) made by the Crowell company
in the United States or the like as a self-adhesive sheet.
[0055] In the wire harness sheet 11 of the embodiment, the length
of the first self-adhesive layer 15 is different from that of the
second self-adhesive layer 17 in a parallel direction (a direction
along which the first side portion 19 and the second side portion
21 are in parallel with each other). For example, the length of the
first self-adhesive layer 15 is shorter than that of the second
self-adhesive layer 17. When the widths of the sheet base material
13, the first self-adhesive material layer 15, and the second
self-adhesive layer 17 are C, A, and B, respectively, C is set to
be greater than (A+B), and A is set to be smaller than B.
Furthermore, when the gap 33 between the first self-adhesive layer
15 and the second self-adhesive layer 17 has a width of D, C is set
to be equal to A+B+D.
[0056] Subsequently, a production method for a wire harness 35
according to the first embodiment with the wire harness sheet 11
will be described with reference to FIGS. 2(a) to 3.
[0057] It is possible to protect the electric wire bundle 39 by
bonding end edge portions of the wire harness sheet 11 to each
other. At this time, as illustrated in FIG. 2(a), the wire harness
sheet 11 is placed on a worktable (not illustrated) in such a
manner that the second self-adhesive layer 17 becomes a top
surface. The electric wire bundle 39 is set at the center of the
second self-adhesive layer 17 so as to be parallel with the third
side portion 23 and the fourth side portion 25.
[0058] Subsequently, as illustrated in FIG. 2(b), the electric wire
bundle 39 is fixed by folding the second self-adhesive layer 17 of
the sheet base material 13 in half, and by joining together the
second self-adhesive layers 17. As illustrated in FIG. 3, in the
wire harness 35 manufactured in this manner, the end edge portions
are bonded together so that an extending piece portion 41 is
formed. The first self-adhesive layer 15 further extends from the
extending piece portion 41. In the wire harness 35, the first
self-adhesive layer 15 may be cut off.
[0059] Subsequently, a production method for a wire harness 43
according to a second embodiment with the wire harness sheet 11
will be described with reference to FIGS. 4(a) to 5.
[0060] In the production method for the wire harness 43 according
to the second embodiment, as illustrated in FIG. 4(a), the same
wire harness sheet 11 described above is used, and the wire harness
sheet 11 is placed on the worktable (not illustrated) in such a
manner that the second self-adhesive layer 17 becomes a top
surface. The electric wire bundle 39 is set at a right end of the
first adhesive layer unformed portion 29 so as to be parallel with
the third side portion 23 and the fourth side portion 25.
[0061] Subsequently, as illustrated in FIG. 4(b), the wire harness
sheet 11 is wound in a spiral shape around the electric wire bundle
39, and the electric wire bundle 39 is fixed by bonding the wire
harness sheet 11 to itself.
[0062] At this time, the first non-adhesive layer formation region
29 becomes a winding start base point 37, and the second
self-adhesive layer 17 is adhesive to the first self-adhesive layer
15 at a winding end point, while the second self-adhesive layer 17
is wound around the first self-adhesive layer 15. That is, an outer
circumferential surface of the first self-adhesive layer 15 on an
inner side of the wound wire harness sheet 11 is set to face an
inner circumferential surface of the second self-adhesive layer 17
on an outer side. As illustrated in FIG. 5, the wire harness 43
manufactured in this manner is wound in a spiral shape in which the
first self-adhesive layer 15 and the second self-adhesive layer 17
are adhesively fixed together at the winding end point.
[0063] In the wire harness sheet 11 of the embodiment, the first
self-adhesive layer 15 and the second self-adhesive layer 17 are
respectively provided on the back and top surfaces of the sheet
base material 13. However, the first self-adhesive layer 15 and the
second self-adhesive layer 17 are respectively provided in the
first common region 27 and the second common region 31, the top and
back surfaces of which exactly overlap each other when the sheet
base material 13 is viewed through from above, and which are
located in different positions. Accordingly, even when the
plurality of wire harness sheets 11 are stored in an overlapping
manner in such a manner that the contours of the wire harness
sheets 11 are aligned with each other, the respective self
adhesives of the sheet base materials 13 vertically overlapping
each other do not come into contact with each other, and are not
adhesively fixed together. Since the first self-adhesive layer 15
and the second self-adhesive layer 17 are respectively positioned
on the back and top surfaces of the sheet base material 13, it is
possible to adhesively fix together respective overlapping portions
of the first self-adhesive layer 15 and the second self-adhesive
layer 17 at the winding end point. In addition, the self-adhesive
sheet can be wound in a spiral shape.
[0064] In the wire harness 43 of the embodiment, the sheet base
material 13 is wound around the electric wire bundle 39, the
winding starting from one end of the parallel direction in which
the first self-adhesive layer 15 and the second self-adhesive layer
17 are in parallel with each other. In addition, the sheet base
material 13 is adhesively fixed to itself at the winding end point
by the first self-adhesive layer 15 and the second self-adhesive
layer 17 facing each other. In the wire harness 43, the
self-adhesive sheet without using the release paper, being very
easy to work with and very easy to store, can be wound in a spiral
shape around the electric wire bundle 39. Since the sheet base
material 13 can be wound in a spiral shape in such a manner that
the self adhesive is not exposed to an outer circumferential
surface of the wire harness 43, it is possible to prevent the wire
harness 43 from being adhesively fixed to the sheet base material
13.
[0065] Subsequently, a production method for a wire harness 47
according to a third embodiment with the wire harness sheet 11 will
be described with reference to FIGS. 6(a) to 7.
[0066] In the production method for the wire harness 47 according
to the third embodiment, as illustrated in FIG. 6(a), the same wire
harness sheet 11 described above is used, and the wire harness
sheet 11 is placed on the worktable (not illustrated) in such a
manner that the first self-adhesive layer 15 becomes a top surface.
The electric wire bundle 39 is set at a right end of the second
adhesive layer unformed portion 45 so as to be parallel with the
third side portion 23 and the fourth side portion 25.
[0067] Subsequently, as illustrated in FIG. 6(b), the wire harness
sheet 11 is wound in a spiral shape around the electric wire bundle
39, and the electric wire bundle 39 is fixed by bonding the wire
harness sheet 11 to itself.
[0068] At this time, an end (the third side portion 23) of the
second non-adhesive layer formation region 45 becomes the winding
start base point 37, and the first self-adhesive layer 15 is
adhesive to the second self-adhesive layer 17 at the winding end
point, while the first self-adhesive layer 15 is wound around the
second self-adhesive layer 17. That is, the outer circumferential
surface of the second self-adhesive layer 17 on the inner side of
the wound wire harness sheet 11 is set to face the inner
circumferential surface of the first self-adhesive layer 15 on the
outer side. As illustrated in FIG. 7, the wire harness 47
manufactured in this manner is wound in a spiral shape, in which
the second self-adhesive layer 17 is exposed on an outer
circumference, and in which the first self-adhesive layer 15 and
the second self-adhesive layer 17 are adhesively fixed together at
the winding end point. At this time, since the first self-adhesive
layer 15 lies at the winding end point, the adhesive fixing of wire
harness sheet 11 can be performed by using multiple-layer
winding.
[0069] In the methods of manufacturing the respective wire
harnesses 43 and 47 according to the second embodiment and the
third embodiment, the wire harness sheet 11 is used, and the wire
harness sheet 11 is wound around the electric wire bundle 39,
having the first adhesive layer unformed portion 29 or the second
adhesive layer unformed portion 45 on a back side of the second
self-adhesive layer 17 as the winding start base point 37.
Accordingly, the self-adhesive sheet can be wound in a spiral shape
around the electric wire bundle 39.
[0070] In the methods of the manufacturing the wire harnesses 35,
43, and 47, the wire harness sheet 11 without using the release
paper can be used. Accordingly, it is not necessary to peel the
release paper off the wire harness sheet 11, and the storage
properties, handling properties, and workability of the wire
harness sheet 11 improve.
[0071] The wire harness sheet can be environment-friendly since the
release paper is not required. Since the electric wire bundle 39 is
protected, but is not adhesively fixed to the self adhesive, the
position of the electric wire bundle 39 is easily corrected, and
the qualities of the wire harnesses 35, 43, and 47 improve.
[0072] The wire harness sheet 11 is wound around the electric wire
bundle 39, having the first adhesive layer unformed portion 29 or
the second adhesive layer unformed portion 45 as the winding start
base point 37. Accordingly, the self-adhesive wire harness sheet
can be wound in a spiral shape around the electric wire bundle 39.
When the length of the first self-adhesive layer 15 is different
from that of the second self-adhesive layer 17 in the parallel
direction, the wire harness sheet 11 can be wound around the wire
harnesses 43 and 47 in different patterns by setting the first
adhesive layer unformed portion 29 or the second adhesive layer
unformed portion 45 to the winding start base point 37.
[0073] For example, in the wire harness sheet 11 according to the
embodiments described above, the width of the first self-adhesive
layer 15 is set to be smaller than that of the second self-adhesive
layer 17 (A<B). As illustrated FIGS. 4(a) and 4(b), when the
wire harness sheet 11 is wound around the electric wire bundle 39,
having the first adhesive layer unformed portion 29 as the winding
start base point 37, the wire harness sheet 11 can be wound in a
spiral shape in such a manner that the second self-adhesive layer
17 is not exposed on the outer circumference. At this time, the
adhesive fixing of the first self-adhesive layer 15 and the second
self-adhesive layer 17 is not performed.
[0074] In contrast, as illustrated in FIGS. 6(a) and 6(b), when the
wire harness sheet 11 is wound around the electric wire bundle 39,
having the second adhesive layer unformed portion 45 as the base
point 37, the wire harness sheet 11 can be wound in a spiral shape
in such a manner that the second self-adhesive layer 17 is exposed
on the outer circumference. At this time, since the first
self-adhesive layer 15 is exposed to the outside at the winding end
point, the adhesive fixing of the wire harness sheet 11 to itself
can be performed by using the multiple-layer winding, in which the
wire harness sheets 11 are wound in multiple layers.
[0075] Accordingly, in the wire harness sheet 11, the wire
harnesses 35, 43, and 47, and the methods of manufacturing the wire
harnesses 35, 43, and 47 according to the embodiments, the wire
harness sheet 11 can be stored in an overlapping manner without
using the release paper, and can be wound in a spiral shape around
the electric wire bundle 39.
[0076] Hereinbelow, the characteristics of the wire harness sheet,
the wire harnesses, and the methods of manufacturing the wire
harnesses according to the embodiments of the present invention
will be simply summarized in the following paragraphs (i) to
(iv).
[0077] [i] A wire harness sheet 11 includes:
[0078] a sheet base material 13;
[0079] a first self-adhesive layer 15 formed on one surface in a
first common region 27 of the sheet base material 13, wherein top
and back surfaces of the sheet base material 13 in the first common
region 27 exactly overlap each other when the sheet base material
13 is viewed through from top, and the other surface in the first
common region 27 is a first adhesive layer unformed portion 29;
and
[0080] a second self-adhesive layer 17 formed on at least part of
one surface in a second common region 31 of the sheet base material
13, wherein top and back surfaces of the sheet base material 13
exactly overlap each other when the sheet base material 13 is
viewed through from top, and i first self-adhesive layer 15 is not
formed in the second common region 31.
[0081] [ii] In the wire harness sheet 11 according to [i], when the
sheet base material 13 is viewed through from top, a gap 33 is
provided between the first self-adhesive layer 15 and the second
self-adhesive layer 17.
[0082] [iii] Each of wire harnesses 43 and 47 includes:
[0083] a sheet base material 13;
[0084] a first self-adhesive layer 15 formed on one surface in a
first common region 27 of the sheet base material 13, wherein top
and back surfaces of the sheet base material 13 in the first common
region 27 exactly overlap each other when the sheet base material
13 is viewed through from top, and the other surface in the first
common region 27 is a first adhesive layer unformed portion 29;
[0085] a second self-adhesive layer 17 formed on at least part of
one surface in a second common region 31 of the sheet base material
13, wherein top and back surfaces of the sheet base material 13 in
the second comomon region 31 exactly overlap each other when the
sheet base material 13 is viewed through from top, and the first
self-adhesive layer 15 is not formed in the second common region
31; and
[0086] an electric wire bundle 39, wherein
[0087] the sheet base material 13 is wound around the electric wire
bundle 39, the winding starts from one end of the sheet base
material 13 in direction in which the first self-adhesive layer 15
and the second self-adhesive layer 17 are aligned, and the sheet
base material 13 is adhesively fixed to itself at a winding end by
the first self-adhesive layer 15 and the second self-adhesive layer
17 facing each other.
[0088] [iv] A production method for a wire harness 47 in which a
wire harness sheet 11 is used,
[0089] the wire harness sheet 11 including:
[0090] a sheet base material 13;
[0091] a first self-adhesive layer 15 formed on one surface in a
first common region 27 of the sheet base material 13, wherein top
and back surfaces of the sheet base material 13 exactly overlap
each other when the sheet base material 13 is viewed through from
top, and the other surface in the first common region 27 is a first
adhesive layer unformed portion 29; and
[0092] a second self-adhesive layer 17 formed on at least part of
one surface in a second common region 31 of the sheet base material
13, wherein top and back surfaces of the sheet base material
exactly overlap each other when the sheet base material 13 is
viewed through from top, and the first self-adhesive layer 15 is
not formed in the second common region 31,
[0093] the method including:
[0094] a step of winding the wire harness sheet 11 around the
electric wire bundle 39 from a winding start base point which is in
the first adhesive layer unformed portion 29 or a second adhesive
layer unformed portion 45 which is on a back side side of the
second self-adhesive layer.
[0095] The present invention is not limited to the above-mentioned
embodiments. Modifications and improvements can be appropriately
made. In addition, insofar as the object of the present invention
can be achieved, the material, the shape, the dimension, and the
disposition location of each configuration element, the number of
the configuration elements, and the like in the above-mentioned
embodiments are arbitrarily determined, and are not limited.
[0096] The present application claims priority from Japanese Patent
Application No. JP-A-2012-032015, filed on Feb. 16, 2012, the
disclosure of which is hereby incorporated into the present
application by reference.
INDUSTRIAL APPLICABILITY
[0097] In the wire harness sheet, the wire harnesses, and the
methods of manufacturing the wire harnesses according to the
present invention, the wire harness sheet can be stored in an
overlapping manner without using the release paper, and can be
wound in a spiral shape around the electric wire bundle.
REFERENCE SIGNS LIST
[0098] 11: wire harness sheet [0099] 13: sheet base material [0100]
15: first self-adhesive layer [0101] 17: second self-adhesive layer
[0102] 27: first common region [0103] 29: first adhesive layer
unformed portion [0104] 31: second common region [0105] 33: gap
[0106] 37: winding start base point [0107] 39: electric wire bundle
[0108] 45: second adhesive layer unformed portion [0109] 35, 43,
and 47: wire harness
* * * * *