JPH09298015A - Flat harness and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a sheet from peeling off, eliminate useless projections on side parts, and improve safety at a time of handling, in the case where the periphery of a flat-shaped harness main body is covered with the flexible sheet. SOLUTION: A harness main body 12 composed of a plurality of electric wires arranged in a planary manner is placed on the top surface of a widthwise central part 13a of a flexible sheet 13 the top surface of which is coated with a hot melt adhesive, and widthwise opposite side parts 13b, 13c of the sheet 13 projecting from widthwise opposite ends of the harness main body 12 are folded down onto the top side of the harness main body 12, and tip ends of the opposite side parts 13b, 13c are lapped on each other over the harness main body 12. Then, the harness main body 12 and the sheet 13 being in this condition are sandwiched between a top die 20A and a bottom die 20B of a hot press machine and hot-pressed, and thereby the above-mentioned lapped part as well as the sheet 13 and the harness main body 12 are jointed mutually.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat harness having a structure in which a plurality of electric wires arranged in a flat shape in order to increase shape retention are covered with a sheet, and a method for manufacturing the flat harness.

[0002]

2. Description of the Related Art FIG. 15 and FIG.
The conventional flat harness described in Japanese Patent No. 5 is shown.
This flat harness 1 is formed by molding a plurality of electric wires 2 arranged in a flat shape along a wiring path, and covering the formed electric wires 2 with two insulating sheets 3 and 3 from both upper and lower sides. It was done. In this case, 2
Since the sheets 3 and 3 are vertically aligned, two end portions 3a are stacked and joined to each other outside the width direction of the arranged electric wires 2.

[0003]

By the way, in the above-mentioned conventional flat harness 1, the joint P of the two sheets 3 and 3 is formed.
Are on both sides of the harness 1, the sheets 3 and 3 were easy to peel off. In addition, since the joint portion P has a shape protruding from both side portions of the harness 1, there is a problem that extra space is taken and compactness is lacking. Therefore, if you perform trimming to minimize the protrusion,
The processing cost could be high. Furthermore, since the joint P protrudes to the side, there is a possibility that it will be caught by other parts during handling, which may impair workability.

In consideration of the above circumstances, the present invention provides a flat harness capable of preventing peeling of a sheet, eliminating unnecessary protrusions on side portions, and improving workability during handling, and a method for manufacturing the flat harness. The purpose is to

[0005]

According to the flat harness of the first aspect of the invention, a harness main body in which a plurality of electric wires are arranged in a plane is overlapped with both sides of the harness main body at an intermediate portion in the width direction of the harness main body. It is characterized in that it is composed of a single flexible sheet which is wrapped around and is joined to both side portions which overlap each other, and is joined to the harness body.

In this flat harness, the joint portion of the seat end portion is on the upper side of the harness main body, that is, within the width of the harness main body, and does not exist on both side portions, so that the joined sheets are not easily peeled off. Further, since the seat on the side of the harness can be finished to be round along the outer shape of the electric wire, there is no possibility of being caught by other members during handling, and workability can be improved. In addition, it can be formed in close contact with the width of the harness main body and no extra protrusion in the width direction, so it does not take up extra space, it can be made into a compact shape, and trimming processing such as cutting the side part is also possible. It becomes unnecessary.

The invention of claim 2 is the invention according to claim 1, characterized in that the sheet is laminated with two films having different heat shrinkage rates.

This flat harness utilizes the action of bending the sheet so that it bends toward the film side having a large heat shrinkage rate by heating, and it is possible to join the electric wires without leaving a gap.

According to a third aspect of the present invention, there is provided a harness main body in which a plurality of electric wires are arranged in a plane, and a flexible single sheet which is spirally wound around the harness main body and is joined to the harness main body. It is characterized by comprising a long sheet.

In this flat harness, since the long sheet is spirally wound, the joint portions do not exist on both sides. As a result, the joined sheets are less likely to come off. Further, since the seat on the side of the harness can be finished to be round along the outer shape of the electric wire, there is no possibility of being caught by other members during handling, and workability can be improved. Also, since it can be formed in close contact with the width of the harness main body and no extra protrusion in the width direction is made, it can be made compact without taking up extra space, and trimming such as cutting off the side protrusion. No processing is required.

A fourth aspect of the invention is the invention according to the third aspect, characterized in that the sheets are joined to each other at a starting point and an ending point of winding the seat around the harness body.

In this flat harness, the sheets are joined to each other at the start point and the end point of winding the seat around the harness body, so that the spirally wound seat does not loosen.

According to a fifth aspect of the present invention, two sets of harness main bodies in each of which a plurality of electric wires are arranged in a plane are provided, the harness main bodies are wrapped in a stacked state, and the side surfaces are provided between the harness main bodies. It is characterized in that it is composed of a flexible single sheet having an end portion inserted therein.

In this flat harness, since the side end portions of the sheets do not protrude outside, the joined sheets are less likely to peel off. Further, the sheets on both sides of the harness main body can be rounded along the outer shape of the electric wire.

According to a sixth aspect of the present invention, the first and second linear portions in which a plurality of electric wires are arranged in a plane and the first and second linear portions thereof are provided.
A flat harness in which a harness main body having a bent portion which is provided between the linear portions and which is bent in a plane is wrapped with a single flexible sheet, and a lower surface which covers a lower surface side of the first linear portion. Side first covering portion, a lower surface side second covering portion that covers the lower surface side of the second linear portion, and a pair of upper surfaces that are formed on both sides in the width direction of the lower surface side first covering portion and cover the upper surface side of the first linear portion. A sheet is formed by the side first cover portion and the pair of upper surface side second cover portions which are formed on both sides in the width direction of the lower surface side second cover portion, and which are cut with the upper surface side first cover portion. The side first cover portions are joined in a state where they are overlapped with each other in the width direction intermediate portion on the upper surface side of the first linear portion, and the pair of upper surface side second cover portions are overlapped with each other in the width direction intermediate portion on the upper surface side of the second linear portion. It is characterized by being joined in a state.

In this flat harness, even if the harness main body has a bent portion that is bent in a plane, the pair of upper surface side first covering portions and the pair of upper surface side second covering portions are cut to form a pair of upper surface portions. The side first cover portion and the pair of upper surface side second cover portions are overlapped and joined at the width direction intermediate portion on the upper surface side of the first and second straight portions, so that the joint portions are on both sides in the width direction of the harness body. Never exist in a department. As a result, the joined sheets are less likely to come off. Further, the side portion of the flat harness can be finished by rounding the sheet along the outer shape of the electric wire, which improves workability. Further, since it is possible to form the harness body in close contact with the shape of the harness body and no extra protrusion in the width direction is formed, a compact shape can be achieved without taking up an extra space. Further, since the extra portion does not protrude on both sides in the width direction, trimming processing is unnecessary.

The invention of claim 7 is the invention of claims 1, 3, 5, and 6.
The invention according to any one of items 1 to 4, wherein the sheet is
It is characterized by having a hot melt adhesive on the surface.

In this flat harness, the hot-melt adhesive is melted and solidified so that the overlapping portions of the sheets and the sheet and the harness main body are joined together without a gap.

A method for manufacturing a flat harness according to claim 8 is characterized in that a harness main body in which a plurality of electric wires are arranged in a plane is formed,
Place it on the upper surface of the central part in the width direction of a flexible sheet with hot melt adhesive applied on the top surface, and place both side parts of the sheet in the width direction protruding from both ends in the width direction of the harness main body on the upper side of the harness main body. By bending and stacking the ends of the both sides on the harness main body, and sandwiching the harness main body and the sheet in this state between the upper mold and the lower mold of the heating press machine and heat-pressing, the above-mentioned superposition A method for manufacturing a flat harness, which comprises joining parts and a sheet to a harness body.

In this method of manufacturing a flat harness, the sheet and the harness main body, which have been bent in advance, are set in a heating press machine and heated and pressed to melt and solidify the hot melt adhesive, so that the sheet and the harness main body are joined together without a gap. It is possible to obtain the flat harness according to claim 1, which is strongly joined. In particular, since the sheet can be formed in a shape (for example, linear or non-linear) along the wiring path by the press die, it is possible to obtain a flat harness having both the shape retention and the flexibility of the sheet.

The invention according to claim 9 is the method for manufacturing a flat harness according to claim 8, wherein the sheet is laminated with two films having different heat shrinkage rates.

In this flat harness manufacturing method, the action of bending the sheet so as to bend toward the film side having a large heat shrinkage factor by heating can be joined without giving a gap between the electric wires.

According to a tenth aspect of the present invention, a harness main body in which a plurality of electric wires are arranged in a plane is spirally formed by a single flexible long sheet having a hot melt adhesive applied on its upper surface. , And the side end portions of the sheet are wound while being overlapped with each other, and the harness main body and the sheet in this state are sandwiched between the upper die and the lower die of the heating press machine and hot-pressed, so that the side end portions of the sheet and The feature is that the seat and the harness main body are joined to each other.

In this flat harness manufacturing method, one long sheet is spirally wound around the harness main body, and since there is no sheet joining portion on both sides of the harness main body, the sheet is less likely to come off. Further, both sides of the harness main body can be rounded along the outer shape of the electric wire.

The invention according to claim 11 is the invention according to claim 10, wherein the harness of the seat is provided before the seat and the harness main body are sandwiched between the upper mold and the lower mold of the heating press machine. It is characterized in that the sheets at the start point and the end point of the winding around the main body are joined together by ultrasonic welding.

In this flat harness manufacturing method, the spirally wound sheet is not loosened and is heated and pressed by the heating press machine in this state.

According to a twelfth aspect of the present invention, two sets of harness main bodies in each of which a plurality of electric wires are arranged in a plane are provided, and a flexible sheet having a hot melt adhesive applied on the upper surface thereof is arranged in the width direction. Place on the upper surface of the central part with a predetermined gap, and fold both widthwise side parts of the seat protruding from the widthwise side end part of each harness main body to the upper side of the harness main body, and the ends of the both side parts After being superposed on each of the sheets, the harness main body is stepped by bending so that both side portions of the sheet are overlapped from the gap portion, and in this state, the harness main body and the sheet are combined with the upper die and the lower die of the heating press machine. It is characterized in that the both sides of the sheet and the sheet and the harness main body are joined to each other by sandwiching the sheet and heating the sheet.

In this flat harness manufacturing method, since the side end portions of the seat are sandwiched between the harness main bodies, the joint portion of the seat is not exposed to the outside. For this reason,
The sheet will not come off easily. Also, both sides of the harness body can be rounded along the outer shape of the electric wire.

According to a thirteenth aspect of the present invention, the first and second straight line portions in which a plurality of electric wires are arranged in a plane and the first and second straight line portions thereof are provided.
A method for manufacturing a flat harness in which a harness main body having a bent portion which is provided between straight portions and which is bent in a plane is wrapped with a single flexible sheet.
The lower surface side of the straight portion is covered with the lower surface side first and second cover portions of the sheet, respectively, and is provided on both sides in the width direction of the lower surface side first cover portion, and is provided on both sides in the width direction of the lower surface side second cover portion. The pair of upper surface side second covering portions and the pair of cut upper surface side first covering portions are overlapped with each other in the width direction intermediate portion on the upper surface side of the first linear portion, and the pair of upper surface side second covering portions are arranged in the second linear portion. The harness main body and the sheet in this state are superposed on each other in the widthwise middle portion on the upper surface side, and are sandwiched between the upper die and the lower die of the heating press to heat-press the pair of upper surface-side first cover portions and the pair of upper surface-side first cover portions. It is characterized in that the second upper cover portion and the seat and the harness main body are joined to each other.

In this flat harness manufacturing method, the lower surface side of the first and second linear portions of the harness main body having the bent portion is formed by the lower surface side first covering portion and the lower surface side second covering portion of one sheet. After the covering, the upper surface side of the first straight portion is covered with the pair of upper surface side first covering portions. At this time, the pair of upper surface-side first covering portions are overlapped on the upper surface of the first straight portion. Further, the upper surface side of the second linear portion is covered with the pair of upper surface side second covering portions. Also at this time, the pair of upper surface side second covering portions are overlapped with each other on the upper surface of the second linear portion. In this case, the pair of upper surface side first covering portions and the pair of upper surface side second covering portions are cut.

The invention of claim 14 relates to claims 8, 10, and 1.
The invention according to any one of 2 and 13 is characterized in that a cushion material is inserted into the mold surfaces of the upper mold and the lower mold and hot pressing is performed.

In this flat harness manufacturing method, the cushion material is inserted into the mold surface and heated and pressed, whereby damage to the coating of each wire of the harness main body can be reduced. Further, even when the harness main body is composed of electric wires of different sizes, the sheet can be evenly adhered to the surface of each electric wire.

[0033]

Embodiments of the present invention will be described below with reference to the drawings.

First Embodiment FIGS. 1 to 4 show a flat harness 11 according to an embodiment of the present invention.
3A and 3B are explanatory diagrams of a manufacturing process thereof. In order to obtain the flat cable 11 of this embodiment, as shown in FIG. 1, one strip-shaped flexible sheet 13 having a predetermined width (a width slightly larger than twice the width of the harness main body 12 described later) in advance. To prepare. A hot melt adhesive is coated on one surface of the sheet 13 (the surface which becomes the inside when bent). Then, the sheet 13 is divided into three parts in the width direction,
That is, it is divided into a central portion 13a and both side portions 13b and 13c,
Bending lines 13d and 13e are used as boundaries between the respective parts, and light bending is applied to the inside.

Next, as shown in FIG. 2, the folded sheet 13 is once opened, and the central portion 13a of the sheet 13 is opened.
The harness main body 12 is placed on the top. The harness main body 12 has a shape in which a plurality of electric wires 12a are arranged in a plane, and may be simply arranged or adjacent ones may be joined to each other. Harness body 12
When placed on the seat 13, both side portions 13b, 13 of the seat 13 protruding from both ends in the width direction of the harness main body 12
C is bent inward so as to wrap the harness body 12. At this time, the inner surface of the sheet 13 is bent so as to be in close contact with the electric wires 12a at both ends in the width direction of the harness 12,
The tip ends of the both side portions 13b and 13c are lapped on the intermediate portion in the width direction of the harness main body 12. In this state, lightly stop if possible.

Then, in this state, the harness main body 12 and the sheet 13 are attached to the upper die 20A and the lower die 20 of the heating press machine.
Set during B. In this case, the upper die 2 of the heating press
Heat insulating materials 21A and 21B and heaters 22A and 22B are disposed on the 0A and the lower mold 20B, and as the members that form the mold surface, the lower surface of the upper heater 22A and the lower heater 22B.
Cushioning materials (for example, heat-resistant rubber) 23A and 23B having heat resistance and elasticity are provided on the upper surface of the cushioning material 23A and 23B, and the cushioning materials 23A and 23B are provided with concave and convex forming dies 24A and 24B
B is formed.

The harness body 12 and the seat 13 are attached to the upper mold 2
If set between 0A and lower mold 20B, upper and lower molds 20A,
Heat press with 20B. Then, sheet 13
By melting and solidifying the hot melt on the surface of, the lap portion and the sheet 13 and the harness main body 12 are joined together without a gap, and the flat harness 11 shown in FIG. 4 is obtained.

The flat harness 11 manufactured in this way
Then, the joint portion of the end portion of the seat 13 is the harness body 12
Exists on the upper side of the harness body 12, that is, within the width of the harness body 12 and does not exist on both sides of the flat harness 11, so that the joined sheet 13 is less likely to peel off. Further, since the sheet 13 is rounded along the outer shape of the electric wire 12a at the side portion of the flat harness 11, there is no corner, and there is no possibility of catching this portion on other members during handling. In addition, since the sheet 13 is formed in a form in which it is in close contact with the side end portion of the harness body 12, no extra protrusion is formed in the width direction, and no extra space is taken up.
Can be molded into a compact shape. Therefore, the trimming process such as cutting the side portion is not necessary, and the cost can be reduced.

Furthermore, since the whole can be formed into a shape (for example, linear or non-linear) along the wiring path by the press die of the heating press machine, the flat harness 11 having the shape retention and flexibility by the sheet 13 is obtained. be able to. In addition, the cushion material 23 is provided on the die surface of the heating press machine.
Since A and 23B are inserted, the damage to the coating of each electric wire 12a of the harness main body 12 can be mitigated, and even when the harness main body 12 is composed of electric wires of different sizes, the sheet 13 is placed on the surface of each electric wire 12a. Can be evenly adhered to, and high quality can be maintained.

The method of joining the sheet 13 to the harness main body 12 is not limited to the hot pressing using the above hot-melt adhesive, but ultrasonic welding or the like may be employed, or the adhesive may simply be used. You may join with.

Second Embodiment FIG. 5 shows a second embodiment of the seat 13. FIG.
FIG. 5A is a cross-sectional view of the sheet 13, and FIG. 5B is an operation explanatory view showing bending like bending when heated. The sheet 13 is formed by laminating two films 13A and 13B having different heat shrinkage rates as shown in FIG. The heat shrinkage rate of the film 13A is set to be larger than that of the film 13B.

Therefore, the film 13 of this embodiment is
When heated, as shown in FIG. 5B, it has a property of bending so as to be curved toward the film 15A having a large heat shrinkage rate. By utilizing this property, when the flat harness 11 is manufactured as in the above embodiment, the film 13
An external force that closes the mutual space is applied to the wires due to the bending of
It is possible to join the electric wires without giving a gap.

Third Embodiment Next, a flat harness according to a third embodiment shown in FIGS. 6 and 7 and a method for manufacturing the flat harness will be described.

The flat harness 31 of this embodiment has a harness body 33 in which a plurality of electric wires 32 are arranged in a plane.
And a single flexible elongated sheet 34 that is spirally wound around the harness body 33 and is joined to the harness body 33. Also, the sheet 34
Is wound around the harness main body 33, the side end portions 35 in the width direction of the seat 34 are overlapped with each other,
Of the overlapped portions, the side end portions 35 of the sheet 34 are joined at the winding start point portion 36 and the end point portion 37.

Next, in order to manufacture the flat harness 31, a single long flexible sheet 34 is prepared.
A hot melt adhesive is applied to the upper surface of the sheet 34. Then, as shown in FIG. 6, a plurality of electric wires 3
A long sheet 34 is spirally wound around the harness main body 33 in which 2 are arranged in a plane. At this time, the harness main body 33 is wrapped so that the side end portions 35 of the seat 34 in the width direction overlap each other, that is, the harness main body 33 is not exposed to the outside. Next, as shown in FIG.
The side end portions 35 of the winding start point portion 36 and the end point portion 37 are joined by ultrasonic welding. This prevents the seat 34 from loosening.

Then, the heating press machine (see FIG. 3) described in the first embodiment is sandwiched between the upper die 20A and the lower die 20B and hot-pressed. As a result, the hot melt adhesive on the surface of the sheet 34 is melted and solidified, so that the side end portions 35 of the sheet 34, the sheet 34 and the harness main body 3 are joined together.
3 and are joined together without a gap.

Flat harness 31 manufactured in this way
Since the joint portion of the sheet 31 is not located on the side portion of the harness main body 33, the joined sheet 34 is less likely to peel off. In addition, since both ends of the harness body 33 are rounded along the outer shape of the electric wire 32, there are no corners, and there is no risk of these parts being caught by other members during handling. In addition, since the sheet 34 is formed in a shape in which it is in close contact with the side end portion of the harness main body 33, no extra protrusion is formed in the width direction, and it is possible to form a compact shape without taking up an extra space. Therefore, the trimming process such as cutting the joint portion of the side portion is not necessary, and the cost can be reduced.

Further, in this embodiment, the elongated sheet 34 is used.
By spirally winding around the harness main body 33,
Since no joining margin is generated, the appearance is improved. Further, by winding the sheet 34 around the harness body 33 in a spiral shape, the flexibility of the flat harness 31 itself is improved.

Fourth Embodiment Next, an embodiment of the flat harness and the manufacturing method thereof shown in FIGS. 8 to 11 will be described.

As shown in FIG. 11, the flat harness 41 of this embodiment includes two sets of harness main bodies 43 and 44 in which a plurality of electric wires 42 are arranged in a plane, and these harness main bodies 43 and 44. It is wrapped in a stacked state, and both side portions 45 are provided between the harness main bodies 43 and 44.
and a flexible sheet 45 into which a and 45b are inserted. A hot melt adhesive is applied to the upper surface of the sheet 45.

Next, to manufacture the flat harness 41 of the present embodiment, as shown in FIG.
2 sets of harness bodies 4 in which 2 are arranged in a plane
3, 44 are placed on the upper surface of the central portion in the width direction of one flexible sheet 45 with a predetermined gap 46 therebetween. Then, as shown in FIG. 9, both side portions 45 in the width direction of the seat 45 protruding from the side end portions in the width direction of the harness main bodies 43, 44.
Bend a and 45b to the upper side of the harness bodies 43 and 43, respectively. In this case, the bent side ends 45a, 45
The tip of b is overlapped on the sheet 45 in the gap 46.

After that, as shown in FIGS. 10 and 11, the harness bodies 43 and 44 are stacked in layers by bending them so that the side end portions 45a and 45b of the sheet 45 overlap each other from the gap 46. Next, the harness main bodies 43 and 44 and the sheet 45 in this state are heated and pressed by the first embodiment (see FIG. 3).
It is sandwiched between the upper mold 20A and the lower mold 20B and hot-pressed. As a result, the hot-melt adhesive is melted and solidified, and the side edges of the sheet 45, the sheet 45 and the harness main body 4
3, 44 are joined together without a gap.

Flat harness 41 manufactured in this way
In addition to obtaining the same effects as those of the first and second embodiments, one sheet 45 is used for a plurality of harness main bodies 43, 44.
Can be stacked.

Furthermore, the flat harness 4 of this embodiment
1, the flat harness 41 is used as shown in FIG. 12, for example, by utilizing the space between the stacked harness bodies 43 and 44.
When attaching to the vehicle body or the like, the L-shaped bracket 47 can be easily attached by simply inserting it between the stacked harness bodies 43 and 44, and a clip or the like for fixing is unnecessary.

Fifth Embodiment Next, an embodiment of a flat harness and a method for manufacturing the flat harness will be described with reference to FIGS. 13 and 14.

As shown in FIGS. 13 and 14, the flat harness 51 of this embodiment has first, second and third linear portions 53, 54 and 55 in which a plurality of electric wires 52 are arranged in a plane, and A harness main body 58 having bent portions 56 and 57 which are provided between the first and second linear portions 53 and 54 and between the second and third linear portions 54 and 55 and which are bent in a plane, and a flexible body. It is wrapped with one sheet 59 having

As shown in FIG. 13, the seat 59 includes a lower surface side first covering portion 60 that covers the lower surface side of the first linear portion 53 of the harness main body 58 and a lower surface side first covering portion 60 that covers the lower surface side of the second linear portion 54. 2 cover part 61, the lower surface side 3rd cover part 62 which covers the lower surface side of the 3rd linear part 55, the pair of upper surface side 1st cover parts 63a formed in the width direction both sides of the lower surface side 1st cover part 60, 63b
And a pair of upper surface side second cover portions 64a, 64b formed on both sides in the width direction of the lower surface side second cover portion 61, and a pair of upper surface side second portions formed on both width direction sides of the lower surface side third cover portion 62. 3 cover parts 65a and 65b.

The pair of upper surface side first cover portions 63a,
63b and the pair of upper surface side second covering portions 64a, 64b, and between the pair of upper surface side second covering portions 64a, 64b and the pair of upper surface side third covering portions 65a, 65b, a notch 66, 67, 68 and 69 are provided. These notches 66, 67, 68, 69 are formed outward from the portions corresponding to the bent portions 56, 57 of the harness main body 58 as starting points. Therefore, the pair of upper surface side first covering portions 63a, 63b and the pair of upper surface side second covering portions 64a, 6b.
4b and a pair of upper surface side 3rd covering parts 65a and 65b are cut, respectively.

Next, a method of manufacturing the flat wire harness 51 of this embodiment will be described.

Between the first, second and third straight line portions 53, 54 and 55 in which a plurality of electric wires 52 are arranged in a plane and between the first, second and third straight line portions 53, 54 and 55. The harness main body 58 having the bent portions 56 and 57 that are provided and bent in a plane is placed on one flexible sheet 59. At this time, the first, second and third linear portions 53, 54,
The lower surface side of 55 is placed on the lower surface side first covering portion 60, the lower surface side second covering portion 61, and the lower surface side third covering portion 62, respectively.

Next, the pair of upper surface side first cover portions 63a, 6a.
3b is superposed on the upper surface side of the first straight line portion 53. Also,
The pair of upper surface side second cover portions 64a and 64b are connected to the second linear portion 5
Stack on the top side of 4. Further, a pair of upper surface side third
The covering portions 65a and 65b are overlapped on the upper surface side of the third linear portion 55.

At this time, the pair of upper surface side first cover portions 63
a, 63b, a pair of upper surface side second cover portions 64a, 64b,
The pair of upper surface side third covering portions 65a and 65b are notches 6
Since it is cut by 6, 67, 68, 69,
The straight line portion 53, the second straight line portion 54, and the third straight line portion 55 can be easily overlapped on the upper surface side.

The flat wire harness 51 manufactured in this manner has the same effects as those of the above-described first and second embodiments, and in addition, the notches 66, 6 are formed in one sheet 59.
By inserting 7, 68, 69, the bent portions 56, 57
Both side portions in the width direction can be overlapped with each other at the intermediate portion on the upper surface side of the wire harness main body 58 having. Therefore,
Flat wire harness 5 having bent portions 56 and 57
1 can be easily manufactured.

In this embodiment, the bent portions 56 and 57 are
Although an example in which the harness main body 58 that owns two of the above is wrapped by one sheet 59 is shown, the harness main body having one bent portion may be wrapped by one sheet.

[0065]

As described above, according to the first aspect of the invention, since the joint portion of the seat end portion is on the upper side of the harness main body, the joined sheet is less likely to peel off. In addition, since the harness side part is finished to be round, the side part has no corners, and the workability at the time of handling is improved. Further, since no extra protrusion is formed in the width direction, the width dimension can be made compact, and it is not necessary to trim the side portion.

According to the second aspect of the present invention, it is possible to obtain a flat cable that does not provide a gap between the electric wires due to the difference in heat shrinkage between the two films.

According to the third aspect of the present invention, the long sheet is spirally wound around the harness main body, so that the joining margin is eliminated and the joining portion does not occur at the side end portion of the harness main body. As a result, the joined sheets are less likely to peel off, the harness sides are finished in a rounded shape, the sides do not have corners, workability during handling is improved, the width dimension can be made compact, and the trimming process for the joint margin is performed. Becomes unnecessary.

According to the invention of claim 4, the winding start point portion and the end point portion of the sheet are joined to each other, so that the winding state of the sheet is not loosened, and when the sheet is heated and pressed by the heating press machine, the electric wire There is no gap between them.

According to the fifth aspect of the present invention, since the side end portion of the seat is inserted between the two sets of harness main bodies that are stacked, the joint portion of the seat does not occur on the side portion of the harness main body. The same effects as those of claims 1 and 4 can be obtained. Further, in the flat harness of the present invention, two sets of harness main bodies can be stacked with one sheet.

According to the invention of claim 6, the wire harness main body having the bent portion can be wrapped by the one sheet in a state where both side portions are overlapped on the upper surface side of the harness main body, and the wire harness having the bent portion is provided. Can be manufactured.

According to the invention of claim 7, it is possible to obtain a flat harness in which there is no gap between the harness body and the overlapped portion and the seat.

According to the invention of claim 8, the seat and the harness main body can be joined together without a gap, and the flat harness according to claim 1 can be strongly joined. In particular, since the sheet can be formed in a shape along the wiring path by the press die, it is possible to obtain a flat cable having both the shape retention and the flexibility by the sheet.

According to the invention of claim 9, it is possible to obtain a flat cable in which no gap is provided between the electric wires.

According to the invention of claim 10, by winding one long sheet around the harness main body in a spiral shape,
Since there are no seat joints on both sides of the harness body,
The sheet will not come off easily. Further, both sides of the harness main body can be rounded along the outer shape of the electric wire.

According to the invention of claim 11, the sheet wound in a spiral shape is not loosened by joining the side end portions of the start point and the end point of the sheet wound in a spiral shape, and the sheet is heated as it is. It is heated and pressed by a pressing machine, and it is possible to bond without gaps between the electric wires.

According to the twelfth aspect of the invention, since the side end portion of the seat is sandwiched between the harness main bodies, the joint portion of the seat is not exposed to the outside. Therefore, the sheet is less likely to peel off. Also, both sides of the harness body can be rounded along the outer shape of the electric wire.

According to the thirteenth aspect of the present invention, by cutting the upper surface side first cover portion and the upper surface side second cover portion, the pair of upper surface side first cover portions is formed at the intermediate portion on the upper surface side of the wire harness body. Parts can be overlapped and a pair of upper surface side second
The covers can be overlapped. Therefore, even if the wire harness main body having the bent portion is wrapped with one sheet, both side parts of the wire harness main body do not project.

According to the fourteenth aspect of the present invention, the cushion material is inserted into the mold surface and heated and pressed, whereby damage to the coating of each wire of the harness main body can be reduced. Further, even when the harness main body is composed of electric wires of different sizes, the sheet can be evenly adhered to the surface of each electric wire.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a method for manufacturing a flat harness according to a first embodiment of the present invention, and is a partial perspective view showing a state in which a sheet is bent in advance.

FIG. 2 is an explanatory view of the method for manufacturing the flat harness according to the first embodiment of the present invention, in which the harness main body is placed on the seat,
It is a partial perspective view showing a state in which both side portions of the sheet are bent upward.

FIG. 3 is an explanatory view of the method for manufacturing the flat harness of the first embodiment of the present invention, in which the harness main body and the sheet obtained in the step of FIG. 2 are sandwiched between the upper die and the lower side of the heating press machine, It is a side view which shows the state which is going to heat press.

FIG. 4 is a partial perspective view showing the outer appearance of the flat harness of the first embodiment of the present invention obtained in the step of FIG.

FIG. 5 shows a seat according to a second embodiment of the present invention, (a)
Is a cross-sectional view, and FIG.

FIG. 6 is an explanatory diagram of the method for manufacturing the flat harness according to the third embodiment of the present invention, and is a perspective view showing a state in which a long sheet is spirally wound around the harness main body.

FIG. 7 is a plan view showing a flat harness according to a third embodiment of the present invention.

FIG. 8 is an explanatory view of the method for manufacturing the flat harness of the fourth embodiment of the present invention, and is a perspective view showing a state in which two sets of harness main bodies are wrapped in one sheet.

FIG. 9 is an explanatory diagram of the method for manufacturing the flat harness according to the fourth embodiment of the present invention, and is a perspective view showing a state in which two sets of harness main bodies are wrapped in one sheet.

FIG. 10 is an explanatory view of the method for manufacturing the flat harness according to the fourth embodiment of the present invention, and is a perspective view showing a state in which two sets of harness main bodies are wrapped in one sheet and then bent from a gap portion.

FIG. 11 is a perspective view showing a final shape of a flat harness according to a fourth embodiment of the present invention.

FIG. 12 is a perspective view showing an example of attaching the flat harness of the fourth embodiment of the present invention to a vehicle body or the like.

FIG. 13 is a plan view showing a seat portion of a flat harness according to a fifth embodiment of the present invention.

FIG. 14 is a plan view showing a flat harness according to a fifth embodiment of the present invention.

FIG. 15 is a plan view showing a seat of a conventional flat harness by a chain double-dashed line.

FIG. 16 is a cross-sectional view of a conventional flat cable.

[Explanation of symbols]

 11, 31, 41, 51 Flat harness 12, 33, 43, 44, 58 Harness main body 12a, 32, 42, 52 Electric wire 13, 34, 45, 59 Sheet 13a Central part 13b, 13c Side part 13A, 13B Film 20A Top Mold 20B Lower mold 23A, 23B Cushion material 35 Side end portion 46 Gap 53 First straight line portion 54 Second straight line portion 55 Third straight line portion 56, 57 Bent portion 60 Lower surface side first covering portion 61 Lower surface side second covering portion 62 Lower surface side third cover portion 63a, 63b Upper surface side first cover portion 64a, 64b Upper surface side second cover portion 65a, 65b Upper surface side third cover portion

Front page continued (72) Inventor Toshio Inada 252 Kawashimada, Gotemba, Shizuoka Prefecture, Yazaki Parts Co., Ltd. (72) Inventor, Yasuhiro Suzuki, 252 Kawashimada, Gotemba, Shizuoka, Yazaki Parts, Co., Ltd.

Claims (14)

[Claims] 1. A harness main body in which a plurality of electric wires are arranged in a plane, and the harness main body is wrapped in such a manner that both side portions overlap at an intermediate portion in the width direction of the harness main body, and the overlapping both side portions are joined together. A flat harness comprising a single flexible sheet that is joined to the harness body. 2. The flat harness according to claim 1, wherein the sheet is laminated with two films having different heat shrinkage rates. 3. A harness main body in which a plurality of electric wires are arranged in a plane, and a single long flexible sheet that is spirally wound around the harness main body and is joined to the harness main body. A flat harness characterized by consisting of 4. The flat harness according to claim 3, wherein the seats are joined to each other at a start point and an end point of winding the seat around the harness body. 5. A set of two harness main bodies in which a plurality of electric wires are arranged in a plane, and the harness main bodies are wrapped in a stacked state and side ends are inserted between the harness main bodies. A flat harness characterized by comprising a flexible single sheet. 6. A first array of a plurality of electric wires arranged in a plane,
A flat harness in which a harness main body having a second linear portion and a bent portion which is provided between the first and second linear portions and which bends in a plane is wrapped in a single flexible sheet. And a lower surface side first covering portion that covers the lower surface side of the first linear portion, a lower surface side second covering portion that covers the lower surface side of the second linear portion, and both widthwise sides of the lower surface side first covering portion. And a pair of upper surface side first covering portions formed on the upper surface side of the first linear portion, and formed on both sides in the width direction of the lower surface side second covering portion, and cut from the upper surface side first covering portion. The pair of upper surface side second cover portions form the sheet, and the pair of upper surface side first cover portions are joined in a state where they overlap each other in the width direction intermediate portion on the upper surface side of the first linear portion, Of the upper surface side second covering portion of the second linear portion overlapped with each other in the width direction intermediate portion on the upper surface side of the second linear portion. Flat harness, characterized in that it is joined. 7. The flat harness according to claim 1, wherein the sheet has a hot-melt adhesive on the surface. 8. A harness main body in which a plurality of electric wires are arranged in a plane is placed on the upper surface of a central portion in the width direction of a flexible sheet having a hot melt adhesive applied on the upper surface, and the harness main body is placed. Bend both sides in the width direction of the sheet protruding from both ends in the width direction on the harness main body, and stack the tips of the both sides on the harness main body. A method for manufacturing a flat harness, characterized in that the overlapping portion and the sheet and the harness main body are joined to each other by sandwiching them between a lower mold and a lower mold and performing hot pressing. 9. The method for manufacturing a flat harness according to claim 8, wherein the sheet is laminated with two films having different heat shrinkage rates. 10. A harness body in which a plurality of electric wires are arranged in a plane is spirally formed by a single flexible long sheet having a hot melt adhesive applied on the upper surface thereof, and the sheet side. Winding while overlapping the end portions, and sandwiching the harness body and the sheet in this state between the upper die and the lower die of the heating press machine to heat-press the side edges of the sheet and the sheet and the harness body. A method for manufacturing a flat harness, which is characterized in that the flat harnesses are joined to each other. 11. The invention according to claim 10, wherein before the sheet and the harness main body are sandwiched between the upper die and the lower die of the heating press machine, a winding start point portion of the sheet around the harness main body and A method for manufacturing a flat harness, characterized in that the sheets at the end points are joined together by ultrasonic welding. 12. A pair of harness main bodies, each having a plurality of electric wires arranged in a plane, are predetermined on the upper surface of the central portion in the width direction of a flexible sheet having a hot melt adhesive applied on the upper surface. The sheets are placed with a gap in between, and both widthwise side portions of the sheet protruding from the widthwise side end portion of each harness body are respectively bent to the upper side of the harness body, and the tip ends of the both side portions are respectively placed on the sheet in the gap. After stacking them, fold them so that both sides of the sheet overlap from this gap and stack the harness main body in this state.In this state, sandwich the harness main body and the sheet between the upper and lower molds of the heating press machine. A method for manufacturing a flat harness, characterized in that the both sides of the sheet and the sheet and the harness main body are joined to each other by hot pressing. 13. A harness main body having first and second straight portions in which a plurality of electric wires are arranged in a plane and bending portions which are provided between the first and second straight portions and which are bent in a plane. A method of manufacturing a flat harness that is wrapped with a single flexible sheet, wherein the lower surface sides of the first and second linear portions are covered with lower surface side first and second covering portions of the sheet, respectively. The pair of upper surface side second covering portions provided on both sides in the width direction of the lower surface side first covering portion and provided on both sides in the width direction of the lower surface side second covering portion, and the pair of upper surface side first covering portions cut off from each other. Overlap at the widthwise intermediate portion on the upper surface side of the first straight portion,
The pair of upper surface side second covering portions are overlapped with each other in the width direction intermediate portion on the upper surface side of the second straight portion, and the harness main body and the sheet in this state are sandwiched between the upper die and the lower die of the heating press to heat. A method for manufacturing a flat harness, characterized in that the pair of upper surface side first covering portions, the pair of upper surface side second covering portions, the sheet and the harness main body are joined to each other by pressing. 14. The invention according to claim 8, wherein a cushion material is inserted into the mold surfaces of the upper mold and the lower mold, and hot pressing is performed. Method for manufacturing flat harness.