Laminated member for flat wiring and wire harness

Abstract

A laminated member (1) for flat wiring has a plurality of electric wires (3) having a linear shape arranged in a width direction orthogonal to an axial direction of the wires, a sheet portion (5) which is a sheet-shaped insulator covering the plurality of electric wires (3) and capable of being folded and laminated in a state of covering the electric wires (3), a tear portion (11) which is a linear portion formed in the sheet portion (5) between adjacent electric wires (3) in a manner of connecting one end portion of the axial direction to the other end portion, becomes a crease when the sheet portion (5) is folded, and is capable of being torn along the line with a tearing force of less than 4.91 N, and a fixing portion (7) provided to faces (F1, F2) of the sheet portion (5) overlapping each other in a folded state, fixing the overlapping faces (F1, F2) to each other in the folded state.

Description

Technical Field

[0001] This invention relates to laminated components and wire harnesses for flat cabling. Background Technology

[0002] To maximize interior space, automotive wiring harnesses are expected to be as thin as possible. Conventionally, this has been achieved by fabricating portions of the harness as flat components such as flat cables (FC), flexible flat cables (FFC), and flexible printed circuit boards (FPC). However, these structures have several drawbacks, including difficulty in branching and end processing, and unsuitability for large circuits. Therefore, there are cases where stacked flat components create a structure suitable for large circuit wiring. However, in structures with stacked flat components, maintaining the stacked state requires time for bonding / fixing each layer, as well as materials for bonding / fixing. Furthermore, manufacturing wiring materials separately requires time and equipment. Additionally, the positioning of each stacked layer requires high precision. A known technique involves creating creases along the long side of an FFC and forming a stacked structure by folding along these creases (Patent Document 1). Furthermore, to branch the ends using the FFC in Patent Document 1, slits need to be pre-formed at the desired branching points. In contrast, there is also a known structure that separates the pinhole wire at the location of the pinhole wire by setting a pinhole wire on the FFC and by tearing the pinhole wire (Patent Document 2).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2004-22426

[0006] Patent Document 2: Japanese Patent Application Publication No. 2010-244714 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, in Patent Document 2, the FFC has a cut-out portion called a half-cut along the pinhole line. Therefore, in order to make the end branch, the cut-out portion needs to be set in the FFC in advance, which requires time for setting the cut-out portion.

[0009] The present invention was made to solve such a problem, and its object is to provide a stacked component and wire harness for flat wiring, which can branch at the end without pre-setting a cut, even in a structure that can fold and stack flat components.

[0010] Methods for solving problems

[0011] The flat wiring stacking member of the present invention comprises: a plurality of wires having a linear shape and arranged in a width direction orthogonal to the axial direction of the wires; and a sheet portion, the sheet portion being a sheet-shaped insulator that covers the plurality of wires together and is capable of being folded and stacked in a state of covering the wires. The flat wiring stacking member comprises: a tear portion, the tear portion being a linear portion formed in the sheet portion between adjacent wires in such a way as to connect one end of the axial direction to the other end, serving as a crease when the sheet portion is folded, and capable of tearing along the line with a tearing force of less than 4.91N; and a fixing portion, the fixing portion being provided on the overlapping surfaces of the sheet portion in a folded state, fixing the overlapping surfaces to each other in a folded state.

[0012] The wire harness of the present invention is formed by folding and stacking the sheet portion of the flat wiring stacking member described above.

[0013] Invention Effects

[0014] The present invention provides a stacked component and wire harness for flat wiring, which can branch at the end without pre-setting a slit in a structure that can fold and stack flat components. Attached Figure Description

[0015] Figure 1 This is a top view illustrating a flat wiring stacked component according to an embodiment of the present invention.

[0016] Figure 2 yes Figure 1 AA sectional view.

[0017] Figure 3 It is shown Figure 2 A cross-sectional view of a modified example of the wires in a flat wiring stacked component shown.

[0018] Figure 4 It shows that Figure 1 The front view shows the flat wiring in a folded state using stacked components.

[0019] Figure 5 It is shown Figure 2 A cross-sectional view of a modified example of a tear in a laminated component for flat wiring, as shown.

[0020] Figure 6 This is a top view showing a first modified example of the recesses and protrusions of a laminated component for flat wiring, and is related to... Figure 1 The corresponding diagram.

[0021] Figure 7The figure shows a second variation of the recess and protrusion of the flat wiring stacked component, wherein (a) is a top view showing the flat wiring stacked component in a folded and stacked state, and (b) is an enlarged front view of a portion of (a).

[0022] Figure 8 The figures show a third variation of the recesses and protrusions of the flat wiring stacked component, (a) is a top view showing the flat wiring stacked component folded and stacked, and (b) is a front view enlarged from a portion of (a).

[0023] Figure 9 The figure shows a fourth variation of the recess and protrusion of the flat wiring stacked component, wherein (a) is a top view showing the state of the flat wiring stacked component folded and stacked, and (b) is a front view enlarged from a portion of (a).

[0024] Figure 10 This is a cross-sectional view showing a fifth modified example of the recesses and protrusions of a laminated component for flat wiring, and is related to... Figure 2 The corresponding diagram.

[0025] Figure 11 This is a top view showing a sixth variation of the recess and protrusion of a laminated component for flat wiring. (a) shows the case where the planar shape of the recess and protrusion is circular, (b) shows the case where the planar shape of the recess and protrusion is square, and (c) shows the case where the planar shape of the recess and protrusion is rhomboid.

[0026] Figure 12 The diagram shows the sequence of manufacturing the wire harness. (a) shows the flat wiring stacked component used in the manufacturing (the fixing part is omitted). (b) shows a part of the tear in (a) being torn. (c) shows the sheet in (b) being folded.

[0027] Figure 13 It is shown in Figure 12 A top view of a deformation example during bending of the sheet.

[0028] Figure 14 The diagram shows a perspective view of a flat cable used in a test to confirm whether it can be bent and torn. (a) shows the cable before the tear test, and (b) shows the cable during the tear test, with the wire not shown. Detailed Implementation

[0029] Hereinafter, the present invention will be described according to preferred embodiments. Furthermore, the present invention is not limited to the embodiments shown below, and appropriate modifications can be made without departing from the spirit of the invention. In addition, in the embodiments shown below, some parts of the structure are omitted from the illustrations and descriptions; however, regarding the details of the omitted technology, well-known or publicly known techniques will be appropriately applied within the scope that does not contradict the content of the following description.

[0030] First, refer to Figures 1 to 11 The structure of a flat wiring stacked component according to an embodiment of the present invention is described. Figure 1 This is a top view illustrating a flat wiring stacked component according to an embodiment of the present invention. Figure 2 yes Figure 1 AA sectional view. Figure 3 It is shown Figure 2 A cross-sectional view of a modified example of the wires in a flat wiring stacked component shown. Figure 4 It shows that Figure 1 The front view shows the flat wiring in a folded state using stacked components. Figure 5 It is shown Figure 2 A cross-sectional view of a modified example of a tear in a laminated component for flat wiring, as shown. Figure 6 This is a top view showing a first modified example of the recesses and protrusions of a laminated component for flat wiring, and is related to... Figure 1 The corresponding diagram. Figure 7 The figure shows a second variation of the recess and protrusion of the flat wiring stacked component, wherein (a) is a top view showing the flat wiring stacked component in a folded and stacked state, and (b) is a front view enlarged from a portion of (a). Figure 8 The figures show a third variation of the recesses and protrusions of the flat wiring stacked component, (a) is a top view showing the flat wiring stacked component folded and stacked, and (b) is a front view enlarged from a portion of (a). Figure 9 The figure shows a fourth variation of the recess and protrusion of the flat wiring stacked component, wherein (a) is a top view showing the flat wiring stacked component folded and stacked, and (b) is a front view enlarged from a portion of (a). Figure 10 This is a cross-sectional view showing a fifth modified example of the recesses and protrusions of a laminated component for flat wiring, and is related to... Figure 2 The corresponding diagram. Figure 11 This is a top view showing a sixth variation of the recess and protrusion of a laminated component for flat wiring. (a) shows the case where the planar shape of the recess and protrusion is circular, (b) shows the case where the planar shape of the recess and protrusion is square, and (c) shows the case where the planar shape of the recess and protrusion is rhomboid.

[0031] Figure 1 The flat cabling laminate 1 shown is a component used in manufacturing the wiring harness 100 (described later) for use in automobiles, etc. Figure 2 As shown, it includes a wire 3, a sheet portion 5, a tear portion 11, and a fixing portion 7. The wire 3 is a component that forms the wiring in the flat wiring laminate 1, and has a linear shape, extending along the axial direction (X direction) and arranged in the width direction orthogonal to the X direction, which is the Y direction in this case. The wire 3 is not particularly limited as long as it meets the conductivity, strength, etc., required for wiring. For example, as Figure 2 As shown, it can be a conductor like the flat wires 3a to 3f (electrical wires), but it can also be various stranded wires, single-core wires, or such as Figure 3 As shown, insulated wires 4a to 4f are made by covering stranded wires with an insulating sheath of PVC (polyvinyl chloride), polyolefin, etc. Alternatively, wire 3 can also be a twisted pair or a coaxial cable. Furthermore, wire 3 may not be a conductor but rather an optical fiber.

[0032] The sheet portion 5 is a sheet-like insulator that covers the wire 3, and has an upper layer 5a and a lower layer 5b. The upper layer 5a is a sheet-like insulating member that covers the wire 3 from above, and the lower layer 5b is a sheet-like insulating member disposed below the wire 3. Figure 2 As shown, the sheet portion 5 encapsulates the wire 3 by sandwiching it between its upper layer 5a and lower layer 5b and bonding them together, then fusing them with heat, ultrasound, or other methods. Alternatively, a heat-melting adhesive can be used instead of heat or ultrasound for the welding process. The materials of the upper layer 5a and lower layer 5b constituting the sheet portion 5 are not particularly limited, as long as they can insulate the wire 3 and provide the desired strength. Examples of specific materials include laminated coating materials such as PET (polyethylene terephthalate), polyolefins, fluoropolymers, PVC, polyimide, silicone, cellophane, and polyamide.

[0033] Tear section 11 is to become like Figure 4 The crease formed when the sheet portion 5 is folded as shown is a portion used to branch the end of the sheet portion 5 by tearing it while it is folded. The tear portion 11 is as follows: Figure 2 As shown, it is disposed in the plate 5 between adjacent wires 3, and as Figure 1 As shown, the wire 3 (see reference) is connected along the X-axis, with one end 6a connected to the other end 6b. Figure 2 The linear portion formed. In Figure 1 In this example, tear portions 11a to 11e extending along the X direction are shown as tear portions 11. Among the tear portions 11, for example, tear portion 11a... Figure 2 The arrangement shown is between adjacent wires 3, namely flat wire 3a and flat wire 3b.

[0034] The tear section 11 is a structure capable of tearing along the line with a tearing force (load) of less than 4.91 N. In this structure, by applying a tearing force of less than 4.91 N to the tear section 11, the sheet 5 is torn at the tear section 11, causing the wiring to branch. By making the tear section 11 such a structure, even without providing a structure such as a slit in the sheet 5 to facilitate tearing, it is possible to tear the tear section 11 and branch a portion of the wiring. Therefore, even in a structure that allows flat components to be folded and stacked, wiring can be branched at the desired location without pre-setting a slit corresponding to the length of the branch. The lower limit of the tearing force is not particularly limited, but is, for example, 1.5 N or more.

[0035] The tear portion 11 corresponds to the crease when the folded piece 5 is in place, i.e., the rotation axis of the hinge, and its specific structure is not particularly limited as long as it can be torn in the folded piece 5 state. Figure 1 In this example, a pinhole wire is used as the tear section 11. When the tear section 11 is a pinhole wire, as a means to enable the structure to tear along the line with a tearing force of less than 4.91 N, the length of the seam and the length of the cut of the pinhole wire can be adjusted. The pinhole wire can be formed, for example, using a tool such as a pinhole wire cutter after covering the wire 3 with the sheet 5, or it can be formed using an extruder when forming the sheet 5 by extrusion molding.

[0036] like Figure 5 As shown, the tear portion 11 can also be a thin-walled portion. When the tear portion 11 is a thin-walled portion, the thickness of the thin-walled portion can be adjusted, for example, as a means to enable the structure to tear along the line with a tearing force of less than 4.91 N. Specifically, the thin-walled portion can be formed using an extruder, for example, when forming the sheet portion 5 by extrusion molding.

[0037] Whether the tear portion 11 is a pinhole line or a thin-walled portion can be appropriately selected by considering the advantages of each. For example, if the tear portion is a pinhole line, the pinhole line can be formed using a pinhole line cutter or by extrusion molding, which is advantageous in that it offers a wide range of manufacturing methods. On the other hand, if the tear portion 11 is a thin-walled portion, since no slit is formed in the tear portion 11, it is advantageous in that it is easy to improve the strength of the sheet portion 5.

[0038] The fixing part 7 is a component that fixes the sheet portion 5 in a folded state with its overlapping surfaces, and is provided on the overlapping surfaces of the sheet portion 5 in the folded state. For example, consider the following situation: In Figure 2Using the tear 11c as a crease, as shown by arrow B, the surface F1 (overlapping surface, one surface) to the right of the tear 11c is folded back and then folded onto the surface F2 (overlapping surface, the other surface) to the left. In this case, the fixing part 7 has a recess 7a and a protrusion 7b. The recess 7a is a point-like depression formed on one of the overlapping surfaces of the sheet part 5 in the folded state, namely the right surface F1. The protrusion 7b is formed on the other overlapping surface of the overlapping surfaces in the folded state, namely the left surface F2, and is a point-like protrusion that fits into the recess 7a. In this structure, by folding back the surface F1, which is to the right of the tear 11c, and then folding it onto the left surface F2, and by fitting the protrusion 7b into the recess 7a, the left surface F2 and the right surface F1 are fixed in the folded state. In this structure, the position of the overlapping surfaces when fixed is determined by the position of the concave portion 7a and the convex portion 7b, thus making it easy to improve the positioning accuracy of the overlapping surfaces.

[0039] It should be noted that the concave portion 7a and the convex portion 7b can be as follows: Figure 2 As shown, the recess 7a and convex 7b are integrated with the sheet portion 5, but they can also be separate components from the sheet portion 5. When the recess 7a and convex 7b are integrated with the sheet portion 5, the recess 7a and convex 7b can also be formed using an extruder when forming the sheet portion 5 through extrusion molding. Alternatively, the recess 7a and convex 7b can be transferred onto the surfaces of the upper and lower layers 5a and 5b by providing a concave-convex shape on the surface of a pressure unit such as a roller when bonding the upper and lower layers 5b of the sheet portion 5. When the recess 7a and convex 7b are separate components from the sheet portion 5, the recess 7a and convex 7b can be formed by attaching a component with a concave-convex shape formed on its surface, such as an embossed sheet, to the right side surface F1 and the left side surface F2 of the sheet portion 5.

[0040] exist Figure 1 The example illustrates a case where the concave portion 7a and the convex portion 7b have a point-like planar shape. However, as long as the overlapping surfaces can be fixed to each other while the sheet portion 5 is folded, the planar shapes of the concave portion 7a and the convex portion 7b are not limited to point-like shapes. For example, as shown... Figure 6 As shown, the recess 7a and the protrusion 7b can also be linear, extending along the X direction as the axial direction when viewed from above. In this structure, the linear protrusion 7b and the linear recess 7a fit together, thereby fixing the overlapping surfaces together in the folded state. Furthermore, when the recess 7a and the protrusion 7b are linear, they can be formed by extrusion molding or pressure-based transfer.

[0041] Whether the recess 7a and the convex portion 7b are dot-shaped or line-shaped can be appropriately selected by considering the advantages of each. For example, when the recess 7a and the convex portion 7b are set as dots, the number of recesses 7a and convex portions 7b can be increased compared to the case where they are set as lines, thus being advantageous in terms of easily improving positioning accuracy. On the other hand, when the recesses 7a and the convex portion 7b are set as lines, the number of recesses 7a or convex portions 7b can be reduced compared to the case where the recesses 7a and the convex portions 7b are set as dots, thus being advantageous in terms of easily forming recesses 7a or convex portions 7b.

[0042] When the concave portion 7a and the convex portion 7b are dot-shaped, the specific planar shape is not particularly limited as long as the overlapping surfaces can be fixed to each other while the sheet portion 5 is folded. For example, the concave portion 7a and the convex portion 7b can be as follows: Figure 7 As shown in (a), the planar shape is circular, or it can be as shown in (a). Figure 8 As shown in (a), the planar shape is a square, and it can also be as follows: Figure 9 As shown in (a), the planar shape is rhomboid. Furthermore, the solid shape is only required to hold overlapping surfaces in place while folded; there are no particular limitations on the specific solid shape. For example, it could be like... Figure 7 (b) shows a hemispherical shape, or it can be like... Figure 8 (b) shows a columnar shape, which here is a cube; it can also be like... Figure 9 (b) shows a cone. In these structures, the overlapping surfaces are fixed together when the sheet 5 is folded by fitting a circular, square, or rhomboid protrusion 7b into a recess 7a with a planar shape of circular, square, or rhomboid. These structures are advantageous in that they offer a wide range of planar and three-dimensional shapes. It should be noted that when the recess 7a and protrusion 7b are point-shaped, a square or rhomboid planar shape increases the holding force, i.e., the force that holds the overlapping surfaces in place. This is preferred because when the fixing part 7 holds the overlapping surfaces together in place by the square or rhomboid shape with corners, the corners of the recess 7a and protrusion 7b engage with each other, thus increasing the holding force. Furthermore, the larger the planar dimensions of the recess 7a and protrusion 7b, the greater the holding force.

[0043] The fixing part 7 is not limited to having a structure with a recess 7a and a protrusion 7b, as long as it can fix the overlapping surfaces together when the sheet part 5 is folded. For example, the fixing part 7 could also be... Figure 10The hook and loop fastener shown is an example of a fastener. When the fastening part 7 is a hook and loop fastener, it includes a hook piece 7c and a loop piece 7d. The hook piece 7c is a sheet-like component with hook-shaped fibers 8 on its surface, which is attached to one of the overlapping surfaces of the sheet 5 in its folded state, namely the right side surface F1. The loop piece 7d is a sheet-like component with loop-shaped fibers 10 on its surface that engage with the hook 8, which is attached to the other overlapping surface of the sheet 5 in its folded state, namely the left side surface F2. In this structure, by attaching the hook piece 7c and the loop piece 7d together, the hook 8 engages with the loop 10, and the left side surface F2 and the right side surface F1 are fixed together. In this structure, the fastening part 7 can be formed simply by attaching a conventional hook and loop fastener to the surface of the sheet 5 (upper layer 5a).

[0044] The fixing part 7 does not necessarily have to be provided on the entire surface of the overlapping surfaces of the sheet 5 in the folded state; it can also be provided in a region of a portion of the overlapping surfaces in the folded state. For example, Figure 11 As shown, consider the case where the right side of the surface F1, compared to the tear 11c, is folded back along the tear 11c and then folded together with the left side of the surface F2. In this case, a recess 7a is provided in a portion R1 of the end 16a along the width direction (Y direction) of the right side of the surface F1, and a protrusion 7b is provided in a portion R2 of the end 16b along the width direction (Y direction) of the left side of the surface F2. In this structure, the ends 16a and 16b of the overlapping surfaces in the folded state are fixed in the width direction. Therefore, even if the fixing part 7 is not provided on the entire overlapping surface, the overlapping surfaces of the sheet 5 can be fixed to each other.

[0045] Furthermore, the laminated component 1 for flat cabling can also have the flexibility of a flexible flat cable, but as long as it is folded with the tear portion 11 as a crease, it can also have the same structure as a non-flexible flat cable. The above is an explanation of the structure of the laminated component 1 for flat cabling.

[0046] Next, refer to Figure 12 and Figure 13 The sequence of manufacturing the wire harness using the flat wiring stack component 1 is explained. Figure 12 The diagram shows the sequence of manufacturing the wire harness. (a) shows the flat wiring stacked component 1 used in the manufacturing (the fixing part is omitted). (b) shows a part of the tear portion 11a to 11e of (a) being torn. (c) shows the sheet portion 5 of (b) being folded. Figure 13 It is shown in Figure 12 A top view of an example of deformation when the middle section 5 is bent.

[0047] First, such as Figure 12As shown in (a), a flat wiring laminate 1 is prepared. As needed, a portion of the ends 6a and 6b of the sheet 5 are cut along the Y direction to expose the wire 3. A terminal (not shown) is then electrically connected to the exposed wire 3. Next, as... Figure 12 As shown in (b), a tearing force of less than 4.91 N is applied to the desired branching portions of the tear sections 11a-11e, causing them to tear halfway through. Figure 12 In (b), the slit portion 13c is formed by tearing the tear portion 11c from end 6a toward 6b to the middle. Additionally, slit portions 13a and 13b are formed by tearing the tear portions 11a and 11e from end 6b toward end 6a to the middle. Furthermore, the flat wiring lamination member 1 is folded and laminated. Specifically, as... Figure 12 As shown by arrow B in (b), the right side surface F1 is folded back along the tear 11c crease to overlap with the left side surface F2, and then fixed using the fixing part 7 (not shown), thus achieving the desired effect. Figure 12 The wiring harness 100 is completed as shown in (c). Figure 12 (c) The end 6b of the wire harness 100 branches into branch 41 and branch 43 midway through the splits 13a and 13b in the Y direction. Additionally, the end 6a of the wire harness 100 branches into branch 45 and branch 47 midway through the split 13c in the X direction. Thus, by applying a tearing force of less than 4.91 N to the tear 11, the sheet 5 is torn at the tear 11, causing the wiring to branch. By providing such a structure for the tear 11, even without providing a slit in the sheet 5 to facilitate tearing, it is possible to tear the tear 11 and branch a portion of the wiring. Therefore, even in structures where flat components can be folded and stacked, wiring can be branched at desired locations without pre-setting slits corresponding to the branch length.

[0048] In addition, Figure 12 In this process, the flat wiring is bent using the laminated component 1 with a tear 11 formed parallel to the axial direction (X direction) of the wire 3 as a crease. Therefore, the crease is a straight line parallel to the X direction, but the crease is not limited to a straight line parallel to the X direction; it can also be curved. Or, as... Figure 13 As shown in the diagram, crease 51 can also be a crease that makes the orientation of end 6b perpendicular to that of end 6a. Therefore, the bent portion like crease 51 does not necessarily have to be the tear portion 11.

[0049] In addition, Figure 12In the folded structure, the right-side face F1 and the left-side face F2 are of the same size and shape, but they do not need to be identical in size and shape; differences in length, gaps, or the presence or absence of seams are permissible. Furthermore, as long as the folded layers can be unfolded into a flat surface and folded again, they do not need to be of the same shape. Moreover, if the wire harness 100 wishes to more securely fix the right-side face F1 and the left-side face F2, such as... Figure 4 As shown, adhesive tape, hook and loop fasteners, or similar tapes can also be wound around the outer periphery when viewed from the X direction. The above describes the steps for manufacturing the wire harness 100 using the flat wiring laminate component 1.

[0050] Thus, the flat wiring stacked member 1 of this embodiment includes: a wire 3; a sheet 5 capable of covering and folding the wire 3; a tearing portion 11, which forms a crease in the sheet 5 and can be torn with a force of less than 4.91 N; and a fixing portion 7 that fixes the overlapping surfaces of the sheet 5. In this structure, by applying a tearing force of less than 4.91 N to the tearing portion 11, the sheet 5 is torn at the tearing portion 11, causing the wiring to branch. By providing the tearing portion 11 in such a structure, even without providing a slit in the sheet 5 to facilitate tearing, the tearing portion 11 can be torn to branch a portion of the wiring. Therefore, even in a structure that allows flat components to be folded and stacked, wiring can be branched at a desired position without pre-setting a slit corresponding to the length of the branch.

[0051] Furthermore, in the flat wiring laminate 1 of this embodiment, the tear portion 11 can be a pinhole wire. In this structure, the sheet portion 5 is torn along the pinhole wire. In this structure, the pinhole wire can be formed using a pinhole wire cutter or by extrusion molding, thus offering an advantage in terms of a wide range of manufacturing methods.

[0052] Furthermore, in the flat wiring laminate 1 of this embodiment, the tear portion 11 can be a thin-walled portion. In this structure, the sheet portion 5 is torn along the thin-walled portion. In this structure, since no slit is formed in the tear portion 11, it is advantageous to easily improve the strength of the sheet portion 5.

[0053] On the other hand, in the flat wiring stacked member 1 of this embodiment, the fixing part 7 includes: a recess 7a formed on one of the overlapping surfaces of the sheet 5 in the folded state, namely the right side surface F1; and a protrusion 7b formed on the other surface, namely the left side surface F2, which engages with the recess 7a. In this structure, the overlapping surfaces in the folded state are fixed to each other by the engagement of the protrusion 7b and the recess 7a. In this structure, the position of the overlapping surfaces during fixing is determined by the positions of the recess 7a and the protrusion 7b, thus easily improving the positioning accuracy of the overlapping surfaces.

[0054] Furthermore, in the flat wiring laminate 1 of this embodiment, the recess 7a and the protrusion 7b can also be linear, extending along the X direction as the axial direction when viewed from above. In this structure, the linear protrusion 7b and the linear recess 7a fit together, thereby fixing the overlapping surfaces together in the folded state. In this structure, compared to making the recess 7a and the protrusion 7b into points, the number of recesses 7a and protrusions 7b can be reduced, thus making it easier to form recesses 7a and protrusions 7b.

[0055] Furthermore, in the flat wiring stacked member 1 of this embodiment, the recess 7a and the protrusion 7b can be any of a circle, a square, or a rhombus when viewed from above. In this structure, by fitting the circular, square, or rhombus-shaped recess 7a into the circular, square, or rhombus-shaped protrusion 7b, the overlapping surfaces are fixed to each other in the folded state. These structures are advantageous in that they offer a wide range of choices for planar and three-dimensional shapes.

[0056] On the other hand, in the flat wiring laminate component 1 of this embodiment, the fixing part 7 can also be a hook and loop fastener with a hook piece 7c and a loop piece 7d. The hook piece 7c is formed on the right side surface F1 of the sheet portion 5 and has a hook portion 8, and the loop piece 7d is formed on the left side surface F2 and has a loop portion 10. In this structure, by attaching the hook piece 7c of the hook and loop piece 7d, the hook portion 8 and the loop portion 10 are engaged, and the overlapping surfaces are fixed to each other in the folded state. Therefore, the fixing part 7 can be formed simply by attaching a conventional hook and loop fastener to the upper layer 5a of the sheet portion 5.

[0057] Furthermore, in the flat wiring stacked member 1 of this embodiment, the fixing part 7 is provided in a portion R1 and R2 of the ends 16a and 16b of the overlapping surfaces of the sheet portion 5 in the width direction. In this structure, the ends 16a and 16b of the overlapping surfaces in the width direction are fixed to each other in the folded state. Therefore, even if the fixing part 7 is not provided on the entire overlapping surface, the overlapping surfaces can be fixed to each other.

[0058] Furthermore, the wire harness 100 of this embodiment is formed by folding and stacking the aforementioned flat wiring stacking member 1, and thus includes the flat wiring stacking member 1. Therefore, even in a structure that can fold and stack flat members, the ends can be branched without pre-setting slits. Additionally, since the wire harness 100 of this embodiment is formed by folding and stacking a single flat wiring stacking member 1, the width of the wire harness 100 can be narrowed to any width by adjusting the number of folds. Furthermore, it can be applied to areas with a large number of circuits and branches. Moreover, since the wire harness 100 of this embodiment is formed by folding and stacking a single flat wiring stacking member 1, it is not necessary to manufacture and overlap multiple flat wiring stacking members 1. Furthermore, since the wire harness 100 of this embodiment forms a conductive path by folding and stacking a sheet-like flat wiring stacking member 1, the workability for connecting terminals to wire 3 terminals, and for stripping a portion of the sheet 5 when connecting terminals, is excellent. Furthermore, the wire harness 100 of this embodiment reduces the offset during stacking by using the fixing part 7, thus enabling the length and tolerance during operation to be narrowed.

[0059] The present invention will now be described in detail based on the embodiments, but the present invention is not limited to the embodiments.

[0060] (Bending and tearing tests)

[0061] First, as a test to confirm whether it can be bent and torn, a [material / structure] was created. Figure 14 The flat cable shown is tested to see if it can be bent and torn. Figure 14 This is a perspective view showing the flat cable used in the test to confirm its flexibility in bending and tearing. (a) shows the state before the tear test, and (b) shows the state during the tear test. Wire 3 is not shown. First, it is made as follows... Figure 14 The flat cable 1a is shown. Specifically, first, a 14-core cable (not shown) with a size of 0.13 sq and extending along the Y direction and arranged along the X direction is prepared as wire 3. Next, as sheet 5, two PET films with a combined thickness of 0.3 mm and an adhesive layer of 0.042 mm are prepared. The wire 3 is sandwiched between the two PET films, and the adhesive layer is bonded together to form the flat cable 1a. Seven flat cables 1a are produced, and they are referred to as sample numbers 1 to 7. Next, between the two wires 3 of the seven flat cables 1a, a commercially available pinhole wire cutter is used to form a pinhole wire as a tear section 11 in a manner parallel to the X direction. Specifically, for the seven flat cables 1a, the pinhole wire is formed with different values ​​ranging from 1 mm to 4 mm for the cut length and from 1 mm to 5 mm for the seam length.

[0062] Next, the tensile / compression testing machine "Strograf VE10D" manufactured by Toyo Seiki Co., Ltd. was prepared. Furthermore, the testing machine's fixtures were used... Figure 14 As shown in (b), the vise chuck 71a holds the right end 61a, which is the portion of the flat cable 1a to the right of the tear 11, in the X direction. The vise chuck 71a is fixed to the tensile / compression testing machine with the right end 61a facing downward in the Z direction (Z1). Meanwhile, the vise chuck 71b, which is another clamp of the testing machine, holds the left end 61b, which is the portion of the flat cable 1a to the left of the tear 11, in the X direction, and the vise chuck 71b is fixed to the tensile / compression testing machine. Then, the tensile / compression testing machine is driven, and with the vise chuck 71a fixed, the vise chuck 71b is raised in the Z direction (Z2) at a speed of 50 mm / min, stretching the left end 61b and tearing the tear 11 by 125 mm. Other test conditions are as described in JISK 6854 (1999). After tearing, visually evaluate whether the portion of sheet 5 other than the tear 11 is broken. If it is not broken, it is classified as "Tear: 0". On the other hand, if the portion other than the tear 11 is broken, specifically, if tearing were to be performed, the portion other than the tear 11 would also be torn, and therefore sheet 5 cannot be torn along the line of the tear 11, it is classified as "Tear: ×". Then, the flat cable 1a is removed from the tensile / compression testing machine, and it is manually checked whether it can be bent along the tear 11 as a crease. The result is that if sheet 5 can be bent without breaking, it is classified as "Bend: 0", and if sheet 5 cannot be bent without breaking, it is classified as "Bend: ×". The above results are shown in Table 1.

[0063] [Table 1]

[0064]

[0065] As shown in Table 1, samples 1-5 are flat cables 1a torn at the tear section 11 with a tearing force of less than 4.91 N, and both tearing and bending are "0". On the other hand, sample 6 is a flat cable 1a torn at the tear section 11 with a tearing force of 4.91 N, with bending being "0", but tearing being "×". In addition, sample 7 is a flat cable 1a torn at the tear section 11 with a tearing force of 4.95 N, with both tearing and bending being "×". Based on these results, it can be seen that if the tearing force is less than 4.91 N, the tear section 11 can be torn regardless of the ratio of the slit length to the seam length, and bending is also possible.

[0066] (Stacking test)

[0067] Next, after forming a fixing part 7 on the surface of the flat cable 1a that can be bent and torn in the tear and bending test, it is bent and stacked, and the bent state is fixed by the fixing part 7, thereby attempting to manufacture the wire harness 100. The fixing part 7 uses two types: embossed sheets (with a planar shape of circular, square, or rhomboid, and dimensions of 5.5mm in length, 3.0mm in width, and 1.0mm in depth, arranged without gaps) and hook and loop fasteners (PST-019 hook and loop fasteners manufactured by Pstyle). The planar dimensions of the fixing part are 6cm in width and 1cm in length. As a result, whether the fixing part 7 is an embossed sheet or a hook and loop fastener, the overlapping state of the bent sheet parts 5 can be maintained by the fixing part 7, and the wire harness 100 can be manufactured. In addition, the positional offset between the bent and stacked surfaces in the wire harness 100 is less than 0.5mm in front-back and left-right, which allows for high-precision stacking.

[0068] The present invention has been described above based on the embodiments, but the present invention is not limited to the above embodiments. Modifications can be made without departing from the spirit of the present invention, and other technologies can be appropriately combined within the possible scope. Furthermore, known or widely known technologies can also be combined within the possible scope.

[0069] For example, in the above embodiment, the flat wiring stacking member 1 is folded once, illustrating a case with two layers, but the number of layers can also be three or more. In this case, the flat wiring stacking member 1 can be folded into a corrugated shape, for example.

[0070] Furthermore, in the above embodiment, the fixing part 7 has only a recess 7a formed on one of the overlapping surfaces of the sheet part 5 in the folded state, namely the right side surface F1, and only a recess 7a formed on the other surface, namely the left side surface F2. However, the arrangement of the recess 7a and the protrusion 7b is not limited to this arrangement. Specifically, the fixing part 7 in the folded state can have a recess 7a formed on one surface and a protrusion 7b that engages with the recess 7a on the other surface. More specifically, it is also possible to provide a recess 7a and a protrusion 7b on one surface, and a protrusion 7b and a recess 7a that engage with the recess 7a and protrusion 7b on the other surface.

[0071] Explanation of reference numerals in the attached figures

[0072] 1: Stacked components for flat cabling

[0073] 3: Electrical wires

[0074] 3a, 3b, 3c, 3d, 3e, 3f: Flat wire (electrical wire)

[0075] 4a, 4b, 4c, 4d, 4e, 4f: Insulated wires (electrical wires)

[0076] 5: Film Department

[0077] 6a, 6b: Ends

[0078] 7: Fixing part

[0079] 7a: concave part

[0080] 7b: convex part

[0081] 7c: Hook plate

[0082] 7D: Terry Cloth Sheets

[0083] 8: Hook (fiber)

[0084] 10: Terry loop section (fiber)

[0085] 11, 11a, 11b, 11c, 11d, 11e: Tear sections

[0086] 16a, 16b: Ends

[0087] 100: Wiring harness

[0088] F1: The face on the right (overlapping face, one face)

[0089] F2: The left side (overlapping side, another side)

[0090] R1, R2: Regions

Claims

1. A laminated component for flat wiring, characterized in that, It comprises: multiple wires, the multiple wires having a linear shape and arranged in a width direction orthogonal to the axis of the wires; and a sheet portion, the sheet portion being a sheet-like insulator that covers the multiple wires together, capable of being folded and stacked in a state of covering the wires. The flat wiring stacked component includes: The tear portion is a linear portion formed in the sheet portion between adjacent wires in such a way as to connect one end of the axial direction to the other end, which becomes a crease when the sheet portion is folded, and is capable of tearing along the line with a tearing force of less than 4.91N. as well as A fixing part is provided on the overlapping surfaces of the sheet in a folded state, and the overlapping surfaces are fixed together in a folded state.

2. The laminated component for flat wiring according to claim 1, characterized in that, The torn portion is a pinhole thread.

3. The laminated component for flat wiring according to claim 1, characterized in that, The torn portion is a thin-walled portion.

4. The laminated component for flat wiring according to claim 1, characterized in that, The fixing portion includes: a recess formed on one of the overlapping surfaces of the sheet portion; and a convex portion formed on the other surface of the overlapping surfaces and engaging with the recess.

5. The laminated component for flat wiring according to claim 4, characterized in that, When viewed from above, the recess and the convex portion appear as lines extending along the axial direction.

6. The laminated component for flat wiring according to claim 4, characterized in that, The recess and the convex portion are circular, square, or rhomboid when viewed from above.

7. The laminated component for flat wiring according to claim 1, characterized in that, The fastening part is a hook and loop fastener comprising a hook piece and a loop piece. The hook piece is formed on one side of the overlapping surfaces of the piece and has hook-shaped fibers, and the loop piece is formed on the other side of the overlapping surfaces and has loop-shaped fibers that engage with the hook-shaped fibers.

8. The laminated component for flat wiring according to claim 1, characterized in that, The fixing part is disposed on a portion of the end of the overlapping surface of the piece along the width direction.

9. A wire harness, characterized in that, The flat wiring laminate of any one of claims 1 to 8 is formed by folding and stacking the sheet portion.

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