JP4886478B2 - Wire harness two-dimensional expansion device, wire harness two-dimensional expansion method, and wire harness two-dimensional expansion program - Google Patents

Description

  The present invention relates to a wire harness two-dimensional expansion device, a wire harness two-dimensional expansion method, and a wire harness two-dimensional expansion program that linearize a wire harness arranged in a desired three-dimensional shape and expand it into a two-dimensional shape. It is.

  Various electronic devices are mounted on automobiles or the like as moving bodies. For this reason, the automobile or the like is wired with a wire harness in order to transmit electric power from a power source or the like or a control signal from a computer or the like to the electronic device. The wire harness includes a plurality of electric wires and connectors attached to ends of the electric wires.

  The electric wire includes a conductive core wire and a covering portion made of an insulating synthetic resin that covers the core wire. The electric wire is a so-called covered electric wire. The connector includes a conductive terminal fitting and an insulating connector housing. The terminal fitting is attached to an end portion of the electric wire and is electrically connected to the core wire of the electric wire. The connector housing is formed in a box shape and accommodates the terminal fitting.

  When assembling the wire harness, the electric wire is first cut to a predetermined length, and then a terminal fitting is attached to the end of the electric wire. Connect wires as needed. Thereafter, the terminal fitting is inserted into the connector housing. Thus, the wire harness described above is assembled.

  The design of the wire harness is prepared in parallel with the design progress of the vehicle or the like in which the wire harness is routed. Usually, a route layout of a wire harness is requested by a manufacturer such as a vehicle (simply referred to as a car manufacturer), and a component manufacturer that receives the request uses a manufacturing jig to manufacture a wire harness that satisfies the request. Further, Patent Literature 1 describes a wire harness design support method that can easily convert three-dimensional data of a wire harness into a two-dimensional drawing.

In Patent Document 1, a development plane for two-dimensionally developing the wire harness data is set, the wire harness data is divided into a plurality of segments for each predetermined division point, and all the segments are included in the development plane. As described above, it is possible to easily convert the three-dimensional data of the wire harness into a two-dimensional drawing by developing each segment, and shorten the design period of the wire harness.
JP 2003-22721 A

  In Patent Document 1 described above, a line segment connecting the start point of the segment to be developed and the first line segment dividing point is orthographically projected on the development plane with the start end point of the reference trunk line as the center, and this orthoprojected development. The direction of the line on the plane is the direction of the development line. Then, the normal line of the development plane passing through the start point (line piece division point) of the line piece is determined as the rotation axis, and the movement is made around the rotation axis by the angle formed by the development line. Therefore, when the wire harness W shown in FIG. 9 is developed two-dimensionally, the following problems have occurred.

  First, the wire harness W shown in FIG. 9 has an electric wire (electric wire bundle) W1 and connectors W21 and 22 provided at one end and the other end of the electric wire W1. In FIG. 9, connectors W21 and 22 have upper surfaces W21a and W22a. The wire harness W1 includes a first part Wy extending from the connector W21 along the Y-axis direction, a second part Wz bent from the first part Wy and extending along the Z-axis direction, and the second part. A third portion Wx that is bent from Wz and is provided along the X-axis direction and connected to the connector W22.

  When manufacturing such a wire harness by two-dimensionally deploying such a wire harness W, when the wire harness is actually three-dimensionally attached to an automobile or the like, it should be attached without difficulty by reducing twisting and pulling. It is necessary to expand two-dimensionally so that Therefore, when the wire harness shown in FIG. 9 is developed in two dimensions in consideration of restoring in three dimensions, the third part Wx of the electric wire W1 and the connector W22 are in the twenty second part in consideration of restoration in three dimensions. Development is performed so as to be located on the extended line of Wz (Development 1: dashed line in the figure). And it expand | deploys so that the 2nd part Wz and 3rd part Wx of the electric wire W1 may be located on the extension line | wire of the 1st part Wy (Development 2: A dashed-two dotted line in a figure).

  By developing two-dimensionally in this way, as shown in FIG. 10A, the upper surface W22a of the connector W22 is a side surface, that is, the minimum deformation that occurs when the curve is linearized can be kept. it can. Therefore, the wire harness manufactured based on the two-dimensionally developed development can be attached without difficulty, for example, by reducing twisting, pulling, etc. when actually attached, thereby improving the mounting quality. Can do.

  However, in Patent Document 1 described above, since the normal line of the development plane is rotated around the rotation axis, when the wire harness W shown in FIG. 9 is developed two-dimensionally, as shown in FIG. 10B. The upper surface W22a of the connector W22 remains facing upward. That is, when straightening a portion of the wire harness W such as a bend or a bend, if the straight line is not followed according to the curve characteristics, a deformation such as an excessive twist occurs. For this reason, the amount of deformation increases depending on the curve characteristics of the wire harness, and there is a problem that when it is actually three-dimensionally attached to an automobile or the like, it cannot be attached without difficulty by reducing twisting, pulling, and the like. It was.

  Therefore, in view of the above-described problems, the present invention provides a wire harness two-dimensional deployment device, a wire harness two-dimensional deployment method, and a wire harness 2 that can be deployed from a three-dimensional shape to a two-dimensional shape with a minimum amount of deformation. The issue is to provide a dimension expansion program.

In order to solve the above problems, the wire harness two-dimensional deployment device according to claim 1 made according to the present invention linearizes a wire harness arranged in a desired three-dimensional shape as shown in the basic configuration diagram of FIG. A wire harness two-dimensional expansion device that expands into a two-dimensional shape, the route information acquisition unit 11a for acquiring route information indicating the route of the wire harness, and the route information acquired by the route information acquisition unit 11a Dividing means 11b for dividing the wire harness into a plurality of segments; setting means 11c for setting the moving end of the segment divided by the dividing means 11b as a development point and the other end as a reference point; and curves characteristic detection unit 11d that detects the curve characteristics of the segment, the curve characteristic detecting unit 11d is based on the curve characteristic detection, before To the occurrence of deformation amount by twisting for deploying wire harness two-dimensionally shaped to minimize the rotational axis setting unit 11e for setting a rotational axis for rotating the direction vector of the expansion point, the rotary shaft setting means The rotation angle detecting means 11f for detecting the rotation angle for rotating the direction vector of the expansion point with respect to the rotation axis set by 11e, and the expansion with respect to the rotation axis by the rotation angle detected by the rotation angle detection means 11f. Expansion means 11g that rotates the direction vector of the point and moves the expansion point to a position corresponding to the length of the segment on the extension line of the direction vector of the reference point to linearize the segment. Features.

According to the wire harness two-dimensional deployment device of the present invention described in claim 1, when the route information of the wire harness to be linearized is acquired by the route information acquiring unit 11a, the wire indicated by the route information by the dividing unit 11b. The harness is divided into multiple segments. Then, the moving end of the divided segment is set by the setting means 11c as the development point and the other end as the reference point, and the curve characteristics indicating the length, curvature, deflection, etc. of the segment to be linearized are set. Is detected by the curve characteristic detecting means 11d. The rotation axis for rotating the direction vector of the development point by the rotation axis setting means 11e is set based on the curve characteristics in order to minimize the amount of deformation caused by twisting when the wire harness is expanded into a two-dimensional shape. Then, the rotation angle for rotating the direction vector of the development point with respect to the rotation axis is detected by the rotation angle detection means 11f. Then, the direction vector of the expansion point is rotated by the rotation angle with respect to the rotation axis by the expansion means 11g, and the expansion point is moved to a position corresponding to the length of the segment on the extension line of the direction vector of the reference point. The segment is straightened.

  In the wire harness two-dimensional deployment device according to claim 1, the wire harness includes a trunk line and a plurality of branch lines branching from the trunk line, as shown in the basic configuration diagram of FIG. And a development plane for flattening the branch line straightened by the development means 11g is set so that the sum of the tilt angles of the plurality of branch lines tilted from the trunk line is minimized. It has a plane setting means 11h.

  According to the wire harness two-dimensional deployment device of the present invention described in claim 2, when the trunk line of the wire harness is straightened by the deployment means 11g, the development plane for planarizing the branch line is tilted from the trunk line. The development plane setting unit 11h sets the sum of the tilt angles of the plurality of branch lines to a minimum.

The method of the wire harness 2-dimensional development according to claim 3 which has been made by the present invention for solving the above problems, the wire harness 2-dimensional to expand in a two-dimensional shape by linearizing the wire harness arranged in a desired three-dimensional shape A wire harness two-dimensional deployment method of a deployment device , wherein the wire harness 2D deployment device acquires route information indicating a route of the wire harness, and the wire harness indicated by the acquired route information is wired. A dividing step in which the harness two-dimensional deployment device divides into a plurality of segments; a setting step in which the wire harness two-dimensional deployment device sets the moving end of the divided segment as a development point and the other end as a reference point; and curves characteristic detecting step of the curve characteristics of the segment wire harness 2-dimensional development device detects that the straightening, the detection Was based on the curve characteristics, the occurrence of deformation amount by twisting for deploying wire harness two-dimensionally shaped in order to minimize the rotation axis of the wire harness 2-dimensional development device for rotating the direction vector of the expansion point a rotation axis setting process but to set a rotation angle detection step of the set rotation angle of the wire harness 2-dimensional development device for rotating the direction vector of the expansion point to the rotation axis is detected, the wire harness 2-dimensional development device and but moving the expansion point at a position corresponding to the length of the segment of the extension of the direction vector of the detected by the rotation angle to rotate the direction vector of the expansion point to the rotation axis and the reference point An unfolding step of straightening the segments.

According to the wire harness two-dimensional expansion method of the present invention described in claim 3, when the route information of the wire harness to be linearized is acquired, the wire harness indicated by the route information is divided into a plurality of segments. Then, the moving end of the divided segment is set as the development point, and the other end is set as the reference point, and the curve characteristics indicating the length, curvature, deflection, etc. of the segment to be linearized are detected. . Then, in order to minimize the amount of deformation caused by twisting when the wire harness is expanded into a two-dimensional shape, the rotation axis that rotates the direction vector of the expansion point is set based on the curve characteristics. A rotation angle for rotating the direction vector of the development point is detected. Then, the direction point vector of the development point is rotated by the rotation angle with respect to the rotation axis, and the development point is moved to a position corresponding to the length of the segment on the extension line of the direction vector of the reference point. Linearized.

The wire harness two-dimensional development program according to claim 4 made according to the present invention to solve the above problems linearizes a wire harness arranged in a desired three-dimensional shape as shown in the basic configuration diagram of FIG. A wire harness two-dimensional expansion program for causing a computer to function as a means for expanding into a two-dimensional shape, acquired by the route information acquiring means 11a for acquiring route information indicating the route of the wire harness, and the route information acquiring means 11a Dividing means 11b for dividing the wire harness indicated by the route information into a plurality of segments, and setting means 11c for setting the moving end of the segment divided by the dividing means 11b as a development point and the other end as a reference point. A curve characteristic detecting means 11d for detecting a curve characteristic of the segment to be linearized, and the curve characteristic Based on the curve detection means 11d detects characteristics, in order to minimize the occurrence of deformation amount by twisting for deploying the wire harness to a two-dimensional shape, set the rotation shaft for rotating the direction vector of the expansion point A rotation axis setting means 11e for rotating, a rotation angle detection means 11f for detecting a rotation angle for rotating the direction vector of the development point with respect to the rotation axis set by the rotation axis setting means 11e, and the rotation angle detection means 11f. Rotating the direction vector of the development point with respect to the rotation axis by the detected rotation angle, and moving the development point to a position corresponding to the length of the segment on the extension line of the direction vector of the reference point This is a wire harness two-dimensional expansion program for causing the computer to function as expansion means 11g for linearizing.

According to the wire harness two-dimensional expansion program of the present invention described in claim 4, when the computer acquires the route information of the wire harness to be linearized by the route information acquisition unit 11a, the route information is indicated by the dividing unit 11b. Divide the wire harness into multiple segments. The moving end of the divided segment is set by the setting means 11c as the development point and the other end as the reference point, and the curve characteristics indicating the length, curvature, deflection, etc. of the segment to be linearized are set. It is detected by the curve characteristic detection means 11d. Then, the rotation axis for rotating the direction vector of the development point by the rotation axis setting means 11e is set based on the curve characteristics in order to minimize the amount of deformation caused by twisting when the wire harness is expanded into a two-dimensional shape. Then, a rotation angle for rotating the direction vector of the development point with respect to the rotation axis is detected by the rotation angle detection means 11f. Then, the development means 11g rotates the direction vector of the development point by the rotation angle with respect to the rotation axis and moves the development point to a position corresponding to the length of the segment on the extension line of the direction vector of the reference point. In this way, the segment is linearized.

  As described above, according to the first, third, and fourth aspects of the present invention, the wire harness to be linearized is divided into a plurality of segments, and the direction vector of the development point is determined based on the curve characteristics corresponding to the segments. The rotation axis to be rotated is set and the rotation angle is detected, and the direction vector of the development point is rotated by the rotation angle with respect to the rotation axis and the length of the segment on the extension line of the direction vector of the reference point is set. Since the development point is moved to the corresponding position, when the segment is bent, the development point can be developed and linearized based on the rotation axis and rotation angle corresponding to the curve characteristics. Therefore, it is possible to minimize the occurrence of deformation such as extra twisting when the wire harness is two-dimensionally deployed. Therefore, when the wire harness manufactured in such a two-dimensionally deployed state is actually three-dimensionally attached to an automobile or the like, the wire harness can be attached without difficulty by reducing twisting and pulling. The harness can be reliably reproduced in a three-dimensional shape and the wearing quality can be guaranteed.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, when the wire harness has a trunk line and a plurality of branch lines, the development plane for developing the wire harness is defined as the trunk line. Since the trunk line is set so that the sum of the tilt angles of a plurality of branch lines tilted from the side is minimized, it is possible to eliminate excessive twisting when the branch lines are expanded two-dimensionally. Therefore, the amount of deformation at the time of planarization can be reduced.

  Hereinafter, the wiring layout design showing the wiring plan shape when the wire harness (W / H) is developed on the wiring board using the wire harness two-dimensional developing device (two-dimensional developing device) according to the present invention is supported. One embodiment of the case will be described with reference to the drawings of FIGS.

  As shown in FIG. 2A, the wire harness W is routed in a vehicle or the like in a three-dimensional shape (three-dimensional shape). The wire harness W includes a plurality of electric wires (electric wire bundles) W1 and a connector W2 attached to one end and the other end of the electric wires W1. The electric wire W1 includes a conductive core wire and a covering portion made of an insulating synthetic resin that covers the core wire. The connector W2 has a conductive terminal fitting and an insulating connector housing.

  As illustrated in FIG. 2B, the wire harness W includes a trunk line Wm and a branch line Wb that branches from the trunk line Wm. Note that the trunk line Wm and the branch line Wb may be a group of electric wires in which a plurality of electric wires are bundled by a protective member such as a tape.

  In the present best mode, in order to simplify the description, a case where a curved layout is designed by linearizing the curved trunk line Wm shown in FIG. 3 will be described. However, both the trunk line Wm and the branch line Wb are linearized. It can be set as various different embodiments. The trunk line Wm is divided into a plurality of segments C1 to C8 by setting a plurality of nodes N1 to N7 from one end Wm1 to the other end Wm2. That is, since the trunk line Wb is like a single rope, it can be considered that a finite number of segments C1 to C8 are connected.

  Therefore, the trunk line Wm can be expressed as a combination of a plurality of segments C1 to C8 at a plurality of nodes N1 to N7. The curve characteristics (characteristic values) set for each of the segments C1 to C8 include length, cross-sectional area, cross-sectional secondary moment, cross-sectional secondary moment (torsion resistance coefficient), longitudinal elastic modulus, transverse elastic modulus, Density, Poisson's ratio, etc. can be set.

  In addition, about the division | segmentation method of the wire harness W, it can set based on various conditions, such as a predetermined equal interval, arbitrary different intervals, arbitrary points, and a curve part.

  In FIG. 4, a two-dimensional development apparatus 10 uses a well-known personal computer (personal computer), and has a central processing unit (CPU) 11 that controls the operation of the entire apparatus according to a predetermined program. ing. The CPU 11 is a readable / writable memory having a ROM 12 which is a read-only memory storing a program for the CPU 11 via the bus B, and a work area for storing various data necessary for the processing work of the CPU 11. A certain RAM 13 is connected.

  A storage device 14 is connected to the CPU 11 via a bus B, and a hard disk device, a large-capacity memory, or the like is used as the storage device 14. As shown in FIG. 5, the storage device 14 includes a wire harness two-dimensional expansion program (hereinafter referred to as a two-dimensional expansion program) P, route information D1, mounting requirement information D2, component information D3, wiring board information D4, two-dimensional. It has a storage area for storing various information such as information D5. The two-dimensional expansion program P is installed from a CD-ROM or the like, or downloaded via a network and stored in the storage device 14.

  The two-dimensional development program P is a two-dimensional development program P that causes a CPU (computer) 11 to function as a means for linearizing the wire harness W routed in a desired three-dimensional shape and developing it into a two-dimensional shape, Route information acquisition means for acquiring route information indicating the route of the wire harness, division means for dividing the wire harness indicated by the route information acquired by the route information acquisition means, and segments divided by the division means A setting means for setting the moving end as a development point and the other end as a reference point, a curve characteristic detecting means for detecting a curve characteristic of the segment to be linearized, and a curve characteristic detected by the curve characteristic detecting means A rotation axis setting means for setting a rotation axis for rotating the direction vector of the development point based on the rotation axis, and the rotation axis setting means for setting A rotation angle detecting means for detecting a rotation angle for rotating the development point with respect to the rotation axis, and rotating a direction vector of the development point with respect to the rotation axis by the rotation angle detected by the rotation angle detection means; An unfolding means for straightening the segment by moving the unfolding point to a position corresponding to the length of the segment on the extension line of the direction vector of the reference point, and the branch line straightened by the unfolding means is planar This is a two-dimensional development program P that causes the CPU 11 to function as development plane setting means for setting the development plane to be converted so that the sum of the tilt angles of the plurality of branch lines tilted from the trunk line is minimized. That is, the CPU 11 functions as the various means described above by executing the two-dimensional expansion program.

  The path information D1 includes three-dimensional shape data such as CAD (computer aided design) indicating the wire harness W shown in FIG. 2 and circuit diagram data of the wire harness W. The route information D1 is provided corresponding to the product number of the wire harness W, and is acquired and stored from a predetermined database according to the design of the wiring layout, or stored in the storage device 14 or the like. Different embodiments can be provided.

  The mounting requirement information D2 is information indicating mounting requirements, manufacturing requirements, and the like of the wire harness W requested by a vehicle manufacturer or the like, and is provided corresponding to the product number of the wire harness W and the like. The mounting requirement information D2 has various data indicating the vehicle mounting quality of the wire harness W, the characteristics of the wire harness W, tolerances when mounting the vehicle, and the like.

  The component information D3 includes various data such as the product number, thickness, rigidity, mounting requirement, restraint state, and the like of the electric wires constituting the wire harness W, and these data are associated with the three-dimensional shape data. That is, it has a data structure that can specify the thickness, rigidity, and mounting requirements of an electric wire at an arbitrary point.

  The wiring board information D4 includes identification data indicating the type of wiring board, dimension data indicating the size of the wiring board (eg, vertical 900 mm × horizontal 1400 mm, etc.), and possible wiring area data. ing. The wiring board information D4 is provided corresponding to the product number of the wire harness W and the like. In the best mode, a case will be described in which the layout design is supported so that the wire harness W fits within the area indicated by the possible wiring area data.

  The two-dimensional information D5 includes wiring layout data indicating a wiring layout R indicating a wiring plane shape when the three-dimensional wire harness W is developed on a wiring board. The two-dimensional information D5 is stored in the storage device 14 in association with the product number of the wire harness W, the wiring board, the bending angle allowable tolerance range data of the present invention, and the like according to the design of the wiring layout.

  An input device 15, a communication device 16, a display device 17, and the like are connected to the CPU 11 via a bus B. The input device 15 includes a keyboard, a mouse, and the like, and outputs input data corresponding to a user operation to the CPU 11. The communication device 16 uses a communication device such as a LAN card or a cellular phone modem. Then, the communication device 16 outputs the received information to the CPU 11 and transmits the information input from the CPU 11 to the designated transmission destination.

  As the display device 17, various display devices such as a known liquid crystal display and CRT are used. The display device 17 displays various information under the control of the CPU 11. That is, the display device 17 displays various screens showing the result of the two-dimensional layout based on the various information.

  Next, an example of the step dimension expansion process when the CPU 11 described above executes the two-dimensional expansion program P will be described with reference to the flowchart of FIG.

In step S11 (route information acquisition means), route information D1 corresponding to the product number of the wire harness instructed by the designer or the like is acquired from a predetermined database or the like and stored in the storage device 14, and step S12 (division) 3), the wire harness W indicated by the acquired route information D1 is divided into a plurality of segments C1 to C8 as shown in FIG. 3, and then the process proceeds to step S13.

  In step S13 (setting means), a development target segment Cs that is a development target is extracted from the divided segments C1 to C8, and an end portion that moves relative to the development target segment Cs as shown in FIG. The development point Pm and the other end are respectively set as the reference point Ps, and then the process proceeds to step S14.

  In the best mode, in order to sequentially extract segments from one end Wm1 to the other end Wm2 of the trunk line Wm, identification data for identifying the extracted expansion target segment Cs is stored in the RAM 13 as expansion target data. . If the expansion target data is not set at the start of processing, the segment C1 at one end Wm1 becomes the expansion target segment Cs, and if it is set, the next segments C2 to C8 become the expansion target segment Cs. .

  In step S14 (curve characteristic detecting means), the curve characteristic of the development target segment Cs is detected, and then the process proceeds to step S15. Here, as the curve characteristics, for example, the length L of the development target segment Cs, the cross-sectional area, the cross-sectional secondary moment, the cross-sectional secondary pole moment (torsional resistance coefficient), the longitudinal elastic modulus, the transverse elastic modulus, the density, the Poisson's ratio Are detected based on route information D1, mounting requirement information D2, component information D4, and the like acquired from a predetermined database or the like to obtain curve characteristics.

In step S15, based on the detected curve characteristic, it is determined whether or not the development target segment Cs is a straight line. When it is determined that the development target segment Cs is a straight line (Y in S15), the process proceeds to step S20 . On the other hand, if it is determined that the development target segment Cs is not a straight line (N in S15), the process proceeds to step S16.

  In step S16 (rotation axis setting means), a rotation axis G for rotating the direction vector V1 of the development point Pm is set based on the detected curve characteristic, and then the process proceeds to step S17. As shown in FIG. 7, the rotation axis G passes through the point where the normal line H perpendicular to the tangent plane K where the curved surface of the wire harness W contacts at the development point Pm and the reference point Ps, and the development point A line connecting Pm and the reference point Ps to the rotation axis G is set to have a curvature radius R of the development target segment Cs.

  In step S17 (rotation angle detection means), a rotation angle θ for rotating the development point Pm with respect to the set rotation axis G is detected, and then the process proceeds to step S18. Here, the angle formed by each of the curvature radii R and the rotation axis G is detected as the rotation angle θ.

  In step S18 (expansion means), the direction vector V1 of the expansion point Pm is rotated about the rotation axis G by the detected rotation angle θ, and the expansion target segment Cs on the extension line of the direction vector V2 of the reference point Ps is rotated. The development point Pm is moved to a position corresponding to the length to linearize the development target segment Ps, and then the process proceeds to step S19. Then, the development point Pm is developed at a development point Pm ′ that is separated from the reference point Ps on the extension line of the direction vector V2 of the reference point Ps by the length L of the development target segment Cs, and its direction. The direction of the vector V1 is also changed.

  In the best mode, the case where the development point Pm is moved on the extension line of the direction vector V2 after rotating the direction vector V1 will be described. However, the present invention is not limited to this, and the development point Pm is not limited thereto. It is also possible to rotate the direction vector V1 after moving it on the extension line of the direction vector V2.

  In step S19, if there are expanded segments that have been expanded before the expansion of the expansion target segment Cs, the expanded segments are also expanded at positions corresponding to the respective lengths on the extension line of the direction vector V2 of the reference point Ps. By expanding the completed nodes N1 to N7, the segments C1 to C8 after the expansion target segment Cs are also linearized, and then the process proceeds to step S20. For example, when the expansion target segment Cs is the segment C3 in FIG. 3, the expanded segments after the expansion target segment Cs are the segments C1 and C2.

  In step S20, it is determined whether or not the development of all divided segments C1 to C8 has been completed. When it is determined that the process has not been completed (N in S20), the process returns to step S13, and a series of processes is repeated. On the other hand, when it is determined that the development of all the segments C1 to C8 has been completed (Y in S20), it is considered that the linearization of the wire harness W divided into the segments C1 to C8 has been completed, and the process proceeds to step S21.

  In step S21 (deployment plane setting means), as shown in FIG. 8, there are a plurality of (three in FIG. 8) development planes Q that flatten the branch lines Wm of the straightened wire harness W from the trunk line Wm. ) Is obtained so that the total sum of the inclination angles θ1 to θ3 of the branch line Wb is minimized, and the wiring board information D3 corresponding to the wiring board used for manufacturing the wire harness W is obtained from a predetermined database or the like. The wiring layout information indicating the wiring layout indicating the development plane when the wire harness W straightened with respect to the development plane Q set based on the wiring board information D3 is planarized and the wiring board information Two-dimensional information D5 is generated based on D3 and stored in the storage device 14, and then the process is terminated.

  Next, an example of the operation (action) of the two-dimensional expansion device 10 described above will be described below.

  When the two-dimensional deployment of the wire harness W designated by the user or the like is requested, the two-dimensional deployment device 10 acquires the route information D1 and, as shown in FIG. 3, the wire harness indicated by the route information D1. The W trunk line Wm is divided into a plurality of segments C1 to C8. For each of the development target segments C1 to C8, the development point Pm and the reference point Ps are set, and the curve characteristics thereof are detected.

  Based on the curve characteristic, a rotation axis G for rotating the direction vector V1 of the development point Pm is set, and a rotation angle θ for rotating the development point Pm with respect to the rotation axis G is detected. That is, in FIG. 3, since the segments C3, C4, and C6 are bent, the rotation axis G extending in the Y-axis direction is set for the segments C3 and C4, and the X for the segment C6. A rotation axis G extending in the axial direction is set.

  Then, the direction vector V1 of the development point Pm is rotated about the rotation axis G by the detected rotation angle θ, and the position vector is expanded to a position corresponding to the length of each segment on the extension line of the direction vector V2 of the reference point Ps. The trunk line Wm of the wire harness W is linearized by moving the point Pm and linearizing each of the segments C1 to C8. Therefore, the trunk line Wm can be developed in the order of developments 1 and 2 shown in FIG.

  Further, as shown in FIG. 8, the development plane Q based on the wiring board information D3 that develops the trunk line Wm of the straightened wire harness W has a tilt angle θ1 of three branch lines Wb that are tilted from the trunk line Wm. Based on the wiring layout information indicating the wiring layout indicating the development plane shape when the linearized wire harness W is developed and 2 and the wiring board information D3. Dimension information D5 is generated and stored in the storage device 14.

  According to the two-dimensional expansion device 10 of the present invention described above, the wire harness W to be linearized is divided into a plurality of segments C1 to C8, and the expansion point Pm is based on the curve characteristics corresponding to each of the segments C1 to C8. The rotation axis G for rotating the direction vector V1 is set and the rotation angle θ is detected, and the direction vector V1 of the development point Pm is rotated by the rotation angle θ with respect to the rotation axis G and the reference point Ps Since the development point Pm is moved to a position corresponding to the length of each of the segments C1 to C8 on the extension line of the direction vector V2, when the segments C1 to C8 are bent, etc., the curve characteristic is supported. Since the development point Pm can be developed and straightened based on the rotation axis G and the rotation angle θ, the amount of deformation such as excessive twisting can be reduced when the wire harness W is developed two-dimensionally. Raw it is possible to minimize. Therefore, when the wire harness W manufactured in such a two-dimensionally deployed state is actually three-dimensionally attached to an automobile or the like, it can be attached without difficulty by reducing twisting, pulling, etc. The wire harness W can be reliably reproduced in a three-dimensional shape and the mounting quality can be guaranteed.

  Further, when the wire harness W has the trunk line Wm and the plurality of branch lines Wb, the development plane Q for deploying the wire harness W is set to the tilt angles θ1 to θ3 of the plurality of branch lines Ws tilted from the trunk line Wm. Since the trunk line Wm is set so that the total sum is minimized, it is possible to eliminate an excessive twist or the like when the branch line Wb is expanded two-dimensionally. Can be reduced.

  In the above-described embodiment, the case where the two-dimensional expansion device 10 is realized by a personal computer has been described. However, the present invention is not limited to this, and various devices such as a dedicated device or a CAD function may be added. Different embodiments can be provided.

  In addition, the Example mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

It is a block diagram which shows the basic composition of the wire harness two-dimensional expansion | deployment apparatus which concerns on this invention. It is a figure which shows an example of the three-dimensional shape of a wire harness, (a) is a general view, (b) has each shown the enlarged view of the part 1 in (a). It is a figure for explaining an example which divides the wire harness concerning the present invention into a plurality of segments. It is a block diagram which shows an example of schematic structure of a wire harness two-dimensional expansion | deployment apparatus. It is a figure for demonstrating an example of a two-dimensional expansion | deployment program and various information. It is a flowchart which shows an example of the two-dimensional expansion | deployment process which CPU of FIG. 4 performs. It is a figure for demonstrating the expansion example of the divided segment. It is a figure for demonstrating the example of a setting of the expansion | deployment plane which planarizes the straightened branch line. It is a figure for demonstrating the two-dimensional expansion | deployment example of a wire harness. It is a figure for demonstrating the problem when a wire harness is linearized, (a) shows the minimum modification example, (b) shows the example of extra twist, respectively.

Explanation of symbols

10 Wire harness two-dimensional deployment device (two-dimensional deployment device)
11a Route information acquisition means (CPU)
11b Dividing means (CPU)
11c Setting means (CPU)
11d Curve characteristic detection means (CPU)
11e Rotation axis setting means (CPU)
11f Rotation angle detection means (CPU)
11g Deployment means (CPU)
11h Development plane setting means (CPU)
C1 to C8 Segment Pm Deployment point Ps Reference point V1, Direction vector W Wire harness Wm Trunk line Wb Branch line θ Rotation angle

Claims (4)

A wire harness 2D deployment device that linearizes a wire harness routed in a desired 3D shape and deploys it in a 2D shape,
Route information acquisition means for acquiring route information indicating the route of the wire harness;
A dividing unit that divides the wire harness indicated by the route information acquired by the route information acquiring unit into a plurality of segments;
Setting means for setting the moving end of the segment divided by the dividing means as a development point and the other end as a reference point;
Curve characteristic detecting means for detecting the curve characteristic of the segment to be linearized;
Based on the curve characteristic detected by the curve characteristic detection means, a rotation axis that rotates the direction vector of the unfolding point in order to minimize the amount of deformation caused by twisting when the wire harness is unfolded into a two-dimensional shape. Rotation axis setting means for setting
Rotation angle detection means for detecting a rotation angle for rotating the direction vector of the development point with respect to the rotation axis set by the rotation axis setting means;
The development point is rotated at a position corresponding to the length of the segment on the extension line of the direction vector of the reference point by rotating the direction vector of the development point with respect to the rotation axis by the rotation angle detected by the rotation angle detection means. Expanding means for moving the segment to straighten the segment;
The wire harness two-dimensional expansion | deployment apparatus characterized by having. The wire harness has a trunk line and a plurality of branch lines branched from the trunk line, and
Development plane setting means for setting a development plane for flattening the branch lines straightened by the development means so that a sum of tilt angles of the plurality of branch lines tilted from the trunk line is minimized. The wire harness two-dimensional deployment device according to claim 1, wherein the wire harness two-dimensional deployment device is characterized. A wire harness two-dimensional deployment method of a wire harness two-dimensional deployment device that linearizes a wire harness routed in a desired three-dimensional shape and deploys the two-dimensional shape,
A route information acquisition step in which the wire harness two-dimensional deployment device acquires route information indicating the route of the wire harness ;
A dividing step in which the wire harness two-dimensional deployment device divides the wire harness indicated by the acquired route information into a plurality of segments;
A setting step in which the wire harness two-dimensional expansion device sets the moving end of the divided segment as a development point and the other end as a reference point;
A curve characteristic detection step in which the wire harness two-dimensional deployment device detects the curve characteristic of the segment to be linearized;
Based on the detected curve characteristics, in order to minimize the amount of deformation caused by twisting when the wire harness is expanded into a two-dimensional shape, a rotation axis for rotating the direction vector of the expansion point is set as a two-dimensional wire harness. A rotation axis setting process set by the deployment device ;
A rotation angle detection step in which the wire harness two-dimensional expansion device detects a rotation angle for rotating the direction vector of the expansion point with respect to the set rotation axis;
The wire harness two-dimensional expansion device rotates the direction vector of the expansion point with respect to the rotation axis by the detected rotation angle, and is positioned at a position corresponding to the length of the segment on the extension line of the direction vector of the reference point. An unfolding step of moving the unfolding point to straighten the segment;
A wire harness two-dimensional deployment method characterized by comprising: A wire harness 2D expansion program for causing a computer to function as a means for linearizing a wire harness routed in a desired 3D shape and expanding it into a 2D shape,
Route information acquisition means for acquiring route information indicating the route of the wire harness;
A dividing unit that divides the wire harness indicated by the route information acquired by the route information acquiring unit into a plurality of segments;
Setting means for setting the moving end of the segment divided by the dividing means as a development point and the other end as a reference point;
Curve characteristic detecting means for detecting the curve characteristic of the segment to be linearized;
Based on the curve characteristic detected by the curve characteristic detection means, a rotation axis that rotates the direction vector of the unfolding point in order to minimize the amount of deformation caused by twisting when the wire harness is unfolded into a two-dimensional shape. Rotation axis setting means for setting
Rotation angle detection means for detecting a rotation angle for rotating the direction vector of the development point with respect to the rotation axis set by the rotation axis setting means;
The development point is rotated at a position corresponding to the length of the segment on the extension line of the direction vector of the reference point by rotating the direction vector of the development point with respect to the rotation axis by the rotation angle detected by the rotation angle detection means. Expanding means for moving the segment to straighten the segment;
A two-dimensional wire harness development program that allows the computer to function.

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