JP2003032866A - Flat wire harness and extra length absorbing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat wire harness which can be extended and contracted with regularity and smoothness in a direction for absorbing the movement of a moving body such as an automobile door, and to accommodate a surplus portion provided in the middle of the harness. To reduce the number of parts and to make it more compact. SOLUTION: A flat wire harness 1 arranged between a vehicle body body and a door of an automobile is configured by joining, for example, three upper, lower, middle and lower band wires 3, 2, 4 to each other, and furthermore. The provision of the ribs 3a and 4a on the upper and lower strips 3 and 4 enhances the bending rigidity and waist strength, so that when the pull-out or push-back is performed in accordance with the motion of a moving body such as a door, the arrangement is made. The rope length does not flutter or slack, and moves with regularity and smoothness. The operation of the flat wire harness 1 with regularity and smoothness is achieved by a harness drawing groove 12 provided in a housing 11 of the device 10.
By making the groove cross-sectional shape of the flat wire harness 1 and the cross-sectional shape of the flat wire harness 1 to be the same, the reciprocating motion such as sliding becomes possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat wire harness provided with an extra length portion so as to be able to expand and contract following the movement of a moving body, and a flat wire for absorbing and accommodating the extra length portion of the harness. The present invention relates to a harness excess length absorbing device.

[0002]

2. Description of the Related Art In an automobile, for example, a wire harness routed from a vehicle body to a door panel is extended and extended in a length direction in accordance with the opening / closing operation of the door, and can be contracted to its original state. Is required. Similarly, in automobiles, the steering device in the driver's seat
A driver sometimes operates a tilt mechanism or a telescopic mechanism in order to adjust the height position and angle of the steering wheel and the axial length according to his / her physique and posture. At that time, the wire harness arranged in the steering column can be expanded and contracted by following the movement of the moving body in each of these mechanisms.

In order to cope with such expansion / contraction operation, an extra length portion is provided in the middle of the wire harness in consideration of the length of expansion / contraction, so as to follow the movement of the moving body such as the door or the tilt mechanism. As the extra harness portion, it is necessary to absorb and store it in the original contracted state in normal times, and many proposals have been made so far for such extra harness harness absorbing device. For example, it can be found in Japanese Utility Model Application Laid-Open No. 63-32527 and Japanese Patent Application Laid-Open No. 3-7639, and the applicant of the present application also has Japanese Patent Application Laid-Open No. 5-3154
23, JP-A-8-256423 and JP-A-10-
It is disclosed in various publications such as 76887.

In the case of the technique disclosed in Japanese Unexamined Patent Publication (Kokai) No. 10-76887, as a typical example, the circuit structure for an automobile door is a stretchable structure in which a flat wire harness is bent in an S-shape and contracted. It is stored in the harness storage section. One end of the harness of the S-shaped contraction portion is locked to a reciprocating slider called a protector, and the forward / backward movement of the reciprocating slider causes the S-shaped contraction portion to be pulled out from the harness accommodating portion to expand and return to its original state. The structure is such that it is contracted and stored. In this case, in consideration of the fact that the wire harness has a flat shape and is soft in terms of bending rigidity and waist strength, a special member such as a guide side plate for guiding the S-shaped contracting portion so that the contracting operation can be smoothly performed. It is provided in.

[0005]

[Patent Document 1] Japanese Patent Application Laid-Open No. 10-76
As can be seen from the structure of Japanese Patent No. 887, a reciprocating slider and a guide side plate are specially provided so that the extra length portion provided in the middle of the wire harness by being contracted in an S shape can be smoothly taken in and out from the harness accommodating portion in a regular manner. As a result, the number of parts and weight increase, which leads to higher cost, and the device becomes more complicated, which is extremely disadvantageous in an automobile where the installation space is severely limited.

In particular, in the case of a flat wire harness, it is difficult to perform a pulling-out operation or a pushing-back operation having a regularity in the installation direction corresponding to the movement of a moving body due to the weakness of the waist, and the movement is fluttering and irregular. There is a point. If the inventor strengthens rigidity and waist in at least a required length of the wiring section of the flat wire harness, regularity and smoothness can be obtained in the movement of the portion coming in and out of the harness accommodating portion, which is realized. This eliminates the need for special members such as the reciprocating slider and guide side plate,
The focus is on making the device compact and compact.

In view of the above, an object of the present invention is to provide a flat wire harness which can be expanded and contracted with regularity and smoothness in a direction in which the motion of a moving body such as an automobile door is absorbed, and an extra length portion provided in the middle of the harness is provided. The number of parts of the device to be housed is reduced, and the device is made compact and compact.

[0008]

In order to achieve the above object, a flat wire harness according to a first aspect of the present invention is arranged between a device body and a moving body that operates with respect to the device body. In order to absorb a change in the length of movement of the moving body, a stretchable harness extra length portion is provided at a predetermined portion of the length of the wiring section.
It is characterized in that the cross-sectional shape of the length portion of the wiring section excluding the extra harness portion is formed into a substantially convex shape or a substantially U shape.

From the above, the flat wire harness according to the first aspect of the present invention operates as follows. By bending the length of the wiring section of the flat wire harness into a substantially convex or U-shaped cross section, bending rigidity and waist strength are strengthened, and when it is pulled out or pushed back according to the motion of the moving body. , The length of the installation section does not flutter or slacken, and it operates with regularity and smoothness.

Further, in the flat wire harness according to a second aspect of the present invention, rib portions 3a, 4a, 5 in which the length portion of the wiring section is raised by bending the central portion in the band width direction into a mountain shape.
The flat wire harness according to claim 1, wherein the flat wire harness has a substantially convex cross section.

From the above, the flat wire harness according to the present invention has the following effects. As a specific example of the cross-sectional shape of the length portion of the installation section, for example, rib portions 3a and 4a in the case of the first embodiment shown in FIG. 2 and rib portion 5b in the case of the third embodiment shown in FIG. As described above, the bending rigidity and the strength of the waist are strengthened by making the section substantially convex.

Further, in the flat wire harness according to a third aspect of the present invention, as in the first embodiment shown in FIG. 2, a plurality of strip wires 3 and 4 having rib portions 3a and 4a are bound together and joined. It is characterized by becoming.

From the above, the flat wire harness according to the third aspect has the following function. In this case, the rib portions 3a, 4
The flat wire harness 1 is constructed by tying and joining the two upper and lower strips 3 and 4 having a, or by sandwiching the strips 3 and 4 between the strips 3 and 4 and joining them together. However, the rigidity and waist strength are further increased.

Further, in the flat wire harness according to the fourth aspect, as in the second embodiment shown in FIG. 4, the joint surfaces of the plurality of strips 3 and 4 can be brought into contact with and separated from each other. Characterize.

From the above, the flat wire harness according to the present invention has the following effects. In this case, for example, by making the joining surfaces of the two upper and lower strips 3 or 4 or the strip 2 in the middle mutually separable, the flat wire harness is pulled out and pushed back to the front of the extra harness portion. By separating the strips 3, 2 and 4 at one end side and integrally joining them outside the device, rigidity and waist strength can be enhanced.

Further, in the flat wire harness according to a fifth aspect of the invention, as in the fifth embodiment shown in FIGS. 11 and 12, both the extra harness portion and the length portion of the wiring section are chevron-shaped. Rib 5b bent up and raised
Has a substantially convex cross section, and its rib portion 5
b is intermittent and is provided in a staggered shape.

From the above, the flat wire harness according to the fifth aspect operates as follows. By providing the rib portion 5b intermittently, it is possible to expand and contract within the harness housing portion. Moreover, since the rib portions 5b have a zigzag shape, it is not necessary for the rib portions 5b to interfere with each other during bending during expansion / contraction operation.

Further, in the flat wire harness according to the sixth aspect, as in the sixth embodiment shown in FIG. 14, the length portion of the wiring section is provided by bending both ends in the band width direction. It is characterized in that the rib portions 6b, 6b have a substantially U-shaped cross section.

From the above, the flat wire harness according to the sixth aspect has the following function. Since the rib portions 6b are provided on both end sides respectively to have a U-shaped cross section, the rigidity against bending and bending is strengthened, and the so-called rigidity is strengthened. Therefore, during the displacement, it does not deviate greatly from the wiring direction and does not slacken, and it moves with regularity and smoothness according to the door opening / closing operation.

Further, a flat wire harness surplus length absorbing device according to a seventh aspect is a device for accommodating a surplus harness portion provided in the flat wire harness according to the first aspect, for example, FIGS. As in the first embodiment shown in FIG. 1, the housing 11 has a housing 11 for retractably accommodating the extra harness portion, and a harness pull-out groove portion 12 for pulling out one end side of the extra harness portion into the housing 11 and the other end. A harness pull-out port 14 for pulling out the side is provided, and a harness pull-out groove portion 12 on one end side is formed to have a substantially convex section or a substantially U-shaped section for guiding and inserting the wiring length portion of the flat wire harness 1. In this case, it is characterized in that it has a substantially convex cross section.

From the above, the device according to the seventh aspect operates as follows. The operation of pulling out and pushing back the flat wire harness 1 from the housing 11 can be performed with regularity and smoothness only by providing the harness pulling-out groove portion 12 having a substantially convex cross section, and the housing 11 can be used to realize it. Since only the harness pull-out groove portion 12 is provided on one end side of the device, the device 10 can be constructed very compactly with a minimum number of parts.

The flat wire harness surplus length absorbing device according to claim 8 is the flat wire harness according to claim 2, which is the second embodiment shown in FIGS. 4 and 5. In this case, it is characterized in that the harness pull-out groove portion 12 on the one end side is provided with the separating blades 17a and 18a for extending into the bent inner sides of the rib portions 3a and 4a and expanding the substantially convex shape.

From the above, the device according to the eighth aspect operates as follows. In this case, when the flat wire harness 1 is composed of, for example, three upper, middle, and lower strips 3, 2, and 4, the separating blades 17a and 18 are provided in the harness drawing groove portion 12.
By providing a, the ribs 3a and 4a are separated from the inside so that the strip lines 3, 2 and 4 can be effectively separated and joined.

In the flat wire harness surplus length absorbing device according to a ninth aspect, when the flat wire harness is according to the fourth aspect, a plurality of belts are provided in the harness pull-out groove portion 12 on the one end side. It is characterized in that separation partition floors 17 and 18 are provided for separating and separating the joining surfaces of the lines 3 and 4.

From the above, the device according to claim 9 operates as follows. In this case, by providing the upper and lower two-stage partition wall floors 17 and 18 in the harness drawing groove portion 12, for example, the strip lines 3 and 4 and the strip line 2 in the middle can be efficiently separated.

Further, in the flat wire harness surplus length absorbing device according to a tenth aspect of the invention, the other end of the harness surplus portion is connected to the outside of the harness lead-out port on the other end side. 35 is provided.

From the above, the device according to the tenth aspect of the present invention operates as follows. As a specific example of connecting the other end side of the extra harness portion derived from the housing of the device, if an electric connector is provided outside the harness outlet provided in the housing, for example, an automobile via the electric connector It can be connected to the power supply circuit on the vehicle body side, and is convenient for easy unitization.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a flat wire harness and a surplus length absorbing device thereof according to the present invention will be described in detail with reference to the drawings. 1 and 2
FIG. 3 is a perspective view showing the flat wire harness 1 and the present device 10 according to the first embodiment, and FIGS. 3A and 3B are side cross-sectional views showing two states of the flat wire harness 1 in a contracted state and an expanded state. It is a figure.

The flat wire harness 1 is, as a specific example of each of a device body and a moving body that operates with respect to the device body, is routed between a vehicle body and a door of an automobile to control electrical components such as a power window. Wiring for supplying electric power, which can be extended in the wiring direction and contracted to its original state when the door is opened or closed.

In FIG. 2, the flat wire harness 1 in this case, which is routed for such a purpose, is a bundle of three strips 2, 3, 4 in the upper, middle and lower directions. The upper and lower strip lines 3 and 4 respectively have rib portions 3a and 4a which are curved in the central portion in the strip width direction and are curved in a gentle mountain shape to extend in the line length direction.
The flat strip 2 is sandwiched between the upper and lower strips 3 and 4 and integrally joined together.

One end side on the right side in the drawing of the flat wire harness 1 having such a band bundle is routed, for example, in a space between a panel of an automobile door and a trim, and is arranged in the routing section of the present invention. It becomes the length part. On the other hand, the other end side on the left side of the drawing can be used by being connected to a power supply circuit on the vehicle body side through, for example, the electric connector 15 (see FIG. 1). On the other end side connected to the electric connector 15, the above-mentioned upper, middle and lower three strips 2, 3 and 4 are separated from each other, and the flat line 3 which can be flexibly extended and contracted.
b, 2, 4b. These three flat lines 3
b, 2, 4b form a harness extra length portion in the present invention, and the harness extra length portion is accommodated in the harness accommodating portion 13 in the housing 11 of the present device 10 described below.

As shown in FIGS. 3 (a) and 3 (b), the apparatus 10 is provided with a housing 11, a harness housing groove 13 is provided at one end of a harness accommodating portion 13 in the housing, and the other end thereof is provided. The harness outlet 14 is provided in the. The cross-sectional shape of the harness pull-out groove portion 12 on the one end side is substantially the same as the cross-sectional shape of the flat wire harness 1 in which the upper, middle, and lower three strips 3, 2, and 4 are bundled. As a result, the flat wire harness 1 is fitted into the harness pull-out groove portion 12 and smoothly guided by regular reciprocating motion such as sliding. The flat wire harness 1 is fitted and inserted in the harness pull-out groove portion 12, and the three flat wires 3b, 2, which are the introduction portions into the harness accommodating portion 13.
The other end side of the extra harness portion 4b is pulled out from the harness pull-out port 14. The other end of the extracted extra harness length portion is connected to the terminal 16 of the electric connector 15, and can be connected to, for example, a power supply circuit on the vehicle body side via the electric connector 15.

Next, the operation and action of the flat wire harness 1 and the apparatus 10 of the first embodiment having the above-mentioned configuration will be described mainly with reference to FIGS. 3 (a) and 3 (b).

In this case, which is a moving body, when the door of the automobile is opened / closed, the flat wire harness 1 follows the movement thereof.
Is pulled out in the installation direction, or is pushed back in the opposite direction, and is displaced. During the displacement, the length of the wiring section of the flat wire harness 1 is composed of the upper, middle and lower bands 3, 2 and 4 and the rib portions 3a and 4a are provided, so that the rigidity against bending and bending is enhanced. That is why the so-called waist is getting stronger. Therefore, during the displacement, it does not deviate greatly from the wiring direction and does not slacken, and it moves with regularity and smoothness according to the door opening / closing operation.

As shown in the contracted state of FIG. 3 (a), when the vehicle body door is opened, the flat wire harness 1 is pulled rightward in the figure by the opening operation, and the flat wire harness 1 is pulled into the housing 11 by the pulling force. 3 of harness extra length absorbed
As shown in FIG. 3B, the flat lines 3b, 2, 4b of the book are drawn out from the harness drawing groove 12 by a required length. As a result, the flat wire harness 1 which is the length of the installation section can be expanded in the installation direction.

On the other hand, when the vehicle body door is closed,
The closing operation pushes the flat wire harness 1 back to the left side in the drawing. Originally, if the flat wire harness has a weak waist, it will flutter or slacken due to the push-back force to make irregular movements. However, in the case of the flat wire harness 1, rigidity and waist strength are enhanced. Therefore, it is smoothly guided by the harness pull-out groove portion 12 of the housing 11 and pushed back with regularity. Harness storage unit 1
Within 3, the extra harness portion formed by the three flat lines 3b, 2 and 4b bends to the original contracted state and absorbs the length of the push-back displacement.

Next, FIGS. 4 and 5 (a) and 5 (b) show a second embodiment which should be called a modification of the apparatus 10 of the first embodiment. Common members are given the same reference numerals.

As shown in FIG. 4, in this case, in the harness pull-out groove portion 12 provided on one side of the housing 11, upper and lower two stages of harness separating partition walls 17 and 18 are provided in the middle of the groove portion. The harness separating partition floors 17 and 18 have separating blades 17a and 18a having a convex cross section, and these separating blades 17a and 18a connect the upper, middle and lower three strips 3, 2 and 4 of the flat wire harness 1 to each other. The wires are separated so that they are on one end side of the flat lines 3b, 2, 4b which are the extra length of the harness. By separating the three strips 3, 2 and 4 on one end side of the extra harness portion in this way, smoothness can be imparted to the movement of the flat lines 3b, 2 and 4b.

On the contrary, when the flat wire harness 1 consisting of the strip lines 3, 2, 4 is pulled rightward in the figure by the motion of the moving body, the extra harness portion by the flat lines 3b, 2, 4b is pulled out. When the harness separating bulkhead floors 17 and 18 are passed from the inside to the outside by the pulling operation, the strip lines 3, 2 and 4 connected to one end side of the extra harness portion which has been separated until then are integrally joined. It becomes the flat wire harness 1.

As described above, in the second embodiment, the three strips 3, 2, 4 constituting the flat wire harness 1 are separated and joined again at least only at required portions. Desorption between 3, 2 and 4 is possible. Such attachment / detachment can be performed by making the joining surfaces of the strip lines 3, 2, 4 each a pressure-sensitive surface adhesive surface.

FIGS. 5A to 5D show the harness accommodating portion 1
3 in order from the harness 3 toward the harness pull-out groove 12
FIG. 4 is a cross-sectional view taken along the arrows AA line, BB line, CC line, and DD line of FIG. As shown in FIG.
It is 3 at the part beyond the floors 17 and 18 for separating the stepped harness.
The strips 3, 2 and 4 of the book are separated from each other and unwound to form one end of the flat lines 3b, 2 and 4b. The same figure (b) has shown the flat lines 3b, 2 and 4b of the upper middle lower right just after passing over the harness separation partition floors 17 and 18. FIG. 3C shows the separating blades 17a and 18a of the harness separating partition floors 17 and 18, respectively.
It shows a mode in which the upper, middle and lower strip lines 3, 2 and 4 are separated by. Further, FIG. 3D shows the length portion of the wiring section of the flat wire harness 1 in a state where the three strips 3, 2 and 4 are still integrally joined immediately after entering from the harness pull-out groove portion 12. Is shown.

The first shown in FIGS. 3 (a) and 3 (b)
Harness pull-out groove portion 1 in device 10 of the embodiment
Compared with the projecting dimension L of 2, the projecting dimension of the harness pull-out groove portion 12 of the second embodiment shown in FIG. 4 can be considerably shortened. Therefore, there is an advantage that the device can be downsized as compared with the devices of FIGS. 3 (a) and 3 (b).

Next, FIGS. 6 to 8 (a) and (b) show a flat wire harness 5 according to a third embodiment of the present invention.
3A and 3B are perspective views showing the device 20 and a side cross-sectional view showing two states of the flat wire harness 5 in a contracted state and an expanded state, respectively.

As shown in FIG. 7, the flat wire harness 5 in this case is composed of one piece, and the central portion of the strip line 5a in the strip width direction is folded back in a chevron shape to provide a rib portion 5b. Extending in the direction. Flat wire harness 5
The other end on the left side in the figure is a flat line 5c that forms a bendable harness surplus portion.

The device 20 has a harness pull-out groove portion 22 on one end side of the housing 21 and a harness pull-out port 24 on the other end side. One end side harness pull-out groove 22
The cross-sectional shape is a convex shape in which the strip wire 5a and the rib portion 5b fit together, and the flat wire harness 5 is guided by the groove having a convex cross-section to enable smooth reciprocating motion such as sliding. A structure including an electric connector 25 and a terminal 26 is provided outside the harness outlet 24 on the other end side of the harness accommodating portion 23, which is the same as in the first and second embodiments.

From the above, the third embodiment also operates and operates as shown in FIGS. 8 (a) and 8 (b). When the door of an automobile, which is a moving body, is opened and closed, the flat wire harness 5 is moved in the movement direction by being drawn out in the wiring direction or pushed back in the opposite direction in accordance with the operation. Since the flat wire harness 5 during the displacement is provided with the rib portion 5b, the rigidity against bending and bending is enhanced, and the so-called stiffness is increased. Therefore, during the displacement, it does not deviate greatly from the wiring direction and does not slacken, and it moves with regularity and smoothness according to the door opening / closing operation.

That is, as shown in the contracted state of FIG. 8A, when the vehicle body door is opened, the flat wire harness 5 is pulled rightward in the figure by the opening operation, and the housing 21 is pulled by the pulling force. As shown in FIG. 8 (b), the harness extra length portion absorbed by the flat wire 5 c is pulled out from the harness pull-out groove portion 22 by a required length. As a result, the flat wire harness 5 can be expanded in the wiring direction.

On the other hand, when the vehicle body door is closed,
By the closing operation, the flat wire harness 5 is pushed back to the left side in the drawing. If the flat wire harness has a weak waist, it pushes back and slackens to cause irregular movements, but in the case of the flat wire harness 5, rigidity and waist strength are enhanced. Therefore, it is smoothly guided by the harness pull-out groove portion 22 of the housing 21 and pushed back, and the extra harness length portion by the flat line 5c bends to the original contracted state in the harness housing portion 23 to absorb the length of the push-back displacement. .

Next, FIGS. 9 and 10 show a flat wire harness 5 and a device 20 according to a fourth embodiment, which should be called a modification of the third embodiment. Figure 10
9A to 9C are arrows AA line, BB line, and C- line in FIG.
It is a longitudinal cross-sectional view from the C line.

In this case, in the harness pull-out groove portion 22 provided on one end side of the housing 21, the cross-sectional shape of the groove portion changes midway. That is, when viewed from the groove entrance side, the flat wire harness 5 including the strip 5a and the rib 5b is fitted and slid in the portion where the groove cross section has a convex shape 22c [Fig. 10 (c)]. I will guide you. The groove shape of the middle groove is slightly wide and the height is low.
2b [Fig. 10 (b)], and with the separation blade 27b attached,
When passing there, the separating blade 27b is divided into the inside of the rib portion 5b to make the mountain shape gentle. Furthermore, the groove cross-sectional shape of the innermost part further expands into a rectangular shape 22a [FIG. 10 (a)], which also has a separating blade 27a, and when passing therethrough, the rib portion 5b is further expanded from the inside. Then make a flat shape that is slightly raised.

As described above, by changing the groove cross-sectional shape of the harness pull-out groove portion 22, the flat wire harness 5 that is led in and out of the harness lead-out groove portion 22 has a substantially flat strip shape from the convex original shape having the folded rib portion 5b. Flat line 5
It can be molded to be c. Such a flat line 5c becomes a stretchable harness extra length portion in the harness housing portion 23 in the housing 21.

Next, FIGS. 11 and 12 show a fifth embodiment which should be called a modified example of the flat wire harness 5 in the fourth embodiment. 12 (a)-
11C shows arrows AA line, BB line, and C- in FIG. 11A.
It is a longitudinal cross-sectional view from the C line.

The flat wire harness 5 in this case is
The rib portion 5b is intermittently provided in the entire length direction of the strip line 5a, and as shown in FIGS. 12 (a) and 12 (c), it has a staggered structure. As seen in the flat wire harnesses of the above-described first to fourth embodiments, in this case, the flat wire forming the extra harness portion is not specially provided. Instead, the rib portion 5b is intermittently provided to enable expansion and contraction in the harness accommodating portion. Moreover, since the rib portions 5b are arranged in a zigzag shape, the rib portions 5b are prevented from interfering with each other during bending during expansion / contraction operation.

Next, FIGS. 13 and 14 are perspective views showing the flat wire harness 6 and the device 30 of the sixth embodiment according to the present invention, and FIGS. 15 (a) and 15 (b).
FIG. 3 is a side cross-sectional view showing two states of the flat wire harness 6 in a contracted state and an expanded state.

As shown in FIG. 14, the flat wire harness 6 in this case is composed of one wire, and both end portions of the strip wire 6a in the strip width direction are bent to provide rib portions 6b and 6b. Extending in the direction. The other end of the flat wire harness 6 on the left side in the drawing is a flat wire 6c that is bendable and forms an extra harness portion.

The device 30 has a harness pull-out groove portion 32 on one end side of the housing 31 and a harness pull-out port 34 on the other end side. One end side harness pull-out groove 32
The cross-sectional shape of the strip wire 6a and the rib portions 6b, 6b at both ends thereof are
The flat wire harness 6 is guided in a regular manner to enable smooth reciprocating motion such as sliding. The structure including the electric connector 35 and the terminal 36 provided in the harness outlet 34 on the other end side of the harness accommodating portion 33 is the same as that of the first, second, third and fourth embodiments.

From the above, also in the sixth embodiment, it operates and acts as shown in FIGS. 15 (a) and 15 (b).
When the door of an automobile, which is a moving body, is opened / closed, the flat wire harness 6 is moved in the movement direction by being pulled out in the wiring direction or pushed back in the opposite direction following the movement. Since the flat wire harness 5 being displaced has a U-shaped cross section with rib portions 6b on both ends, the rigidity against bending and bending is strengthened, and the so-called rigidity is increased. Therefore, during the displacement, it does not deviate greatly from the wiring direction and does not slacken, and it moves with regularity and smoothness according to the door opening / closing operation.

That is, as shown in the contracted state of FIG. 15 (a), when the vehicle body door is opened, the flat wire harness 6 is pulled rightward in the drawing by the opening operation.
The extra length of the harness due to the flat line 6c absorbed in the housing 31 by the pulling force is pulled out from the harness pull-out groove 32 by a required length as shown in FIG. 15 (b). As a result, the flat wire harness 6 can be expanded in the wiring direction.

On the other hand, when the vehicle body door is closed,
The closing operation pushes the flat wire harness 6 back to the left side in the drawing. If the flat wire harness has a weak waist, it pushes back and slackens to cause irregular movements, but in the case of the flat wire harness 5, rigidity and waist strength are enhanced. Therefore, it is smoothly guided by the harness pull-out groove 32 of the housing 31 and pushed back with regularity, and the excess length of the harness due to the flat line 6c is bent back to the original contracted state in the harness accommodating portion 33 and the length of push-back displacement is increased. Absorbs.

As described in the first to sixth embodiments, a door that opens and closes with respect to the body of an automobile has been described as an example of the moving body in the present invention. Not limited. For example, in automobiles as well, there are a wide range of application examples such as sliding seats in the passenger compartment, instrument panels and audio units, air conditioner units and meter units.

[0061]

As described above, the flat wire harness according to the first aspect of the present invention is bent by making the installation length portion of the flat wire harness substantially convex or substantially U-shaped in cross section. Stiffness and strength of the waist are strengthened, and when it is pulled out or pushed back according to the motion of the moving body, its installation length part does not flap or loosen,
A regular and smooth movement can be obtained.

In a flat wire harness according to a second aspect of the present invention, as a specific example of the cross-sectional shape of the installation length portion, a rib portion is provided to make the cross-section substantially convex, so that the bending rigidity and the waist strength can be improved. Will be strengthened.

Further, in the flat wire harness according to the third aspect of the invention, the upper and lower strips having the rib portion are joined together by tying them together, or the strips are integrally sandwiched by another flat strip. By joining to, the rigidity of the flat wire harness and the reinforcement of the waist are increased.

In the flat wire harness according to a fourth aspect of the present invention, for example, the upper and lower two strips can be separated from each other at the joint surfaces of the middle strip, so that the flat wire harness can be pulled out and pushed back. By this operation, it is possible to unravel the respective band lines on the front end side of the extra harness portion, and to strengthen the rigidity and waist strength by integrally joining them outside the device.

Further, in the flat wire harness according to the present invention, the rib portions are intermittently provided so that the rib portions can be expanded and contracted in the harness accommodating portion. Further, by arranging the rib portions in a zigzag shape, it is possible to expand and contract. The ribs do not interfere with each other during bending during operation.

Further, the flat wire harness according to the sixth aspect has a U-shaped cross section with rib portions provided on both end sides, so that the rigidity against bending and bending is strengthened, and so-called stiffness is strong. Has become. Therefore, during the displacement, it does not deviate greatly from the wiring direction and does not slacken, and it moves with regularity and smoothness according to the door opening / closing operation.

Further, in the flat wire harness surplus length absorbing device according to the seventh aspect of the invention, the operation of pulling out and pushing back the flat wire harness from the housing is regulated only by providing a harness pull-out groove portion having a substantially convex cross section. Since the harness pull-out groove portion is only provided on one end side of the housing to achieve this, the device is very compact and can be configured with a minimum number of parts, and downsizing can be realized.

Further, in the flat wire harness surplus length absorbing device according to the eighth aspect, when the flat wire harness is composed of, for example, three upper, middle and lower strips, a separating blade is provided in the harness drawing groove portion. By setting them in advance, the ribs can be effectively separated and joined by being inserted into the rib portion from the inside.

In the flat wire harness surplus length absorbing device according to the ninth aspect of the present invention, by providing the upper and lower two-tiered partition wall floors in the harness pull-out groove portion, for example, two upper and lower strip lines and the middle strip in addition to this are provided. Can be efficiently separated from the strip line.

The flat wire harness surplus length absorbing device according to a tenth aspect of the present invention is a harness drawer provided in a housing as a specific example of connecting the other end side of the harness surplus portion drawn out from the housing of the device. If an electric connector is provided on the outside of the mouth, it can be connected to, for example, a power supply circuit on the body side of an automobile through the electric connector, which is convenient for easy unitization.

[Brief description of drawings]

FIG. 1 is a perspective view showing a flat wire harness surplus length absorbing device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a flat wire harness according to a first embodiment of the present invention.

3 (a) and 3 (b) are side cross-sectional views showing two states of a flat wire harness and a surplus length absorbing device according to the first embodiment, a contracted state and an expanded state.

FIG. 4 is a side sectional view showing a flat wire harness and a surplus length absorbing device according to a second embodiment of the present invention.

5A to 5D are views taken along the line AA in FIG.
It is a longitudinal cross-sectional view from the BB line, the CC line, and the DD line, respectively.

FIG. 6 is a perspective view showing a flat wire harness surplus length absorbing device of a third embodiment according to the invention.

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

8A and 8B are side cross-sectional views showing two states of a flat wire harness and a surplus length absorbing device according to a third embodiment, a contracted state and an expanded state, respectively.

FIG. 9 is a side sectional view showing a flat wire harness and a surplus length absorbing device according to a fourth embodiment of the present invention.

10 (a) to (c) are the arrows AA of FIG.
It is a longitudinal cross-sectional view from a line, BB line, and CC line, respectively.

11 (a) and 11 (b) are views showing a fifth embodiment of the present invention.
It is a side view which shows the two states of the contracted state and expanded state which show the flat wire harness of embodiment.

12 (a) to 12 (c) show arrows AA in FIG.
It is a longitudinal cross-sectional view from a line, BB line, and CC line, respectively.

FIG. 13 is a perspective view showing a flat wire harness and a surplus length absorbing device according to a sixth embodiment of the present invention.

FIG. 14 is a perspective view showing a flat wire harness according to a sixth embodiment of the present invention.

15A and 15B are side views showing a flat wire harness of a sixth embodiment in two states, a contracted state and an expanded state.

[Explanation of symbols]

1, 5, 6 flat wire harness 2, 3, 4 band wire 3a, 4a, 5b, 6b rib portion 3b, 4b, 5c flat wire (harness extra length portion) 10, 20, 30 flat wire harness extra length absorption device 11 , 21, 31 Housings 12, 22, 32 Harness drawing groove parts 17, 18 Harness separating partition floor 14, 24, 34 Harness drawing ports 13, 23, 33 Harness accommodating parts 15, 25, 35 Electrical connectors 16, 26, 36 Terminals

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01R 13/56 H01R 13/56 H02G 3/38 H02G 3/28 F

Claims (10)

[Claims] 1. A cable is installed between a device main body and a moving body that operates with respect to the device main body, and a length section of a wiring section is provided so as to absorb a change in length that moves following the operation of the moving body. A flat wire harness in which a stretchable harness extra length portion is provided at a predetermined position, and a cross-sectional shape of a length portion of a wiring section excluding the harness extra length portion is formed into a substantially convex shape or a substantially U-shape. A flat wire harness characterized in that 2. The length portion of the wiring section is substantially convex in cross section by a rib portion which is formed by bending a central portion in the band width direction into a mountain shape and rising up. Flat wire harness as described. 3. A plurality of strips having the rib portion are bound together and joined.
Flat wire harness described in. 4. The flat wire harness according to claim 3, wherein the joint surfaces of the plurality of strips can be brought into and out of contact with each other. 5. The excessive length portion of the harness and the length portion of the wiring section both have a convex shape in cross section by a rib portion which is bent and raised in a mountain shape, and the rib portion is intermittent. The flat wire harness according to claim 1, wherein the flat wire harness is provided in a zigzag shape. 6. The flat according to claim 1, wherein a length portion of the wiring section has a substantially U-shaped cross section by rib portions provided by bending both end portions in the band width direction. Wire harness. 7. A flat wire harness surplus length absorbing device for accommodating a surplus harness portion provided in the flat wire harness according to claim 1, comprising a housing for accommodating the surplus harness portion in a stretchable manner. Then
This housing is provided with a harness pull-out groove portion for pulling out one end side of the extra harness portion and a harness pull-out opening for pulling out the other end side, and the harness pull-out groove portion on one end side is a length portion of the wiring section of the flat wire harness. A flat wire harness surplus length absorbing device, characterized in that the flat wire harness surplus length absorbing device is formed to have a substantially convex cross section or a substantially U-shaped cross section for guiding and inserting the same. 8. The flat wire harness according to claim 2.
7. In the case of the above item, the harness pull-out groove portion on one end side is provided with a separating blade for dividing into a bent inner side of the rib portion and expanding a substantially convex shape. Flat wire harness extra length absorber. 9. The flat wire harness according to claim 4.
7. The structure according to claim 6, wherein the harness pull-out groove portion on the one end side is provided with a separation partition floor for separating and separating the joint surface of the plurality of strips. Flat wire harness extra length absorber. 10. The flat wire harness according to claim 6, wherein an electric connector to which the other end side of the extra harness portion is connected is provided outside the harness lead-out port on the other end side. Extra length absorber.