JP2008299526A - System, method and program for designing wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the formation load of a three-dimensional layout model. <P>SOLUTION: The wire harness design system for designing a wire harness having a shape branched to a plurality of branch parts, each of the branch parts having a bundle of cables covered with a coating material, comprises a harness diameter calculation means 13 and a harness layout model formation means 14. The harness diameter calculation means 13 calculates the wire harness diameter of each branch part based on the diameter dimension of individual cables constituting the bundle of cables. The harness layout model formation means 14 forms a three-dimensional layout model of wire harness while regarding the branch part as one wire rod having the diameter calculated by the harness diameter calculation means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a system, method and program for designing a wire harness.

Conventionally, in wiring harness design, circuit design that determines electrical connection relationships, etc. has been performed by creating a two-dimensional model such as a circuit diagram, and the route and length when the wire harness is mounted is calculated. Implementation design to be performed is performed by creating a three-dimensional arrangement model. Here, in the mounting design, a three-dimensional CAD program is used, and a three-dimensional arrangement model is created based on the dimension value of the diameter of each electric wire, information indicating the connection relationship between the electric wire and the connector, etc. (Patent Document 1). reference).
JP 2006-114328 A

  However, as described above, when a three-dimensional arrangement model is created by incorporating data on the diameter of each electric wire into a three-dimensional CAD program, the number of electric wires included in the wire harness is large. Model calculation takes a lot of time.

  An object of the present invention is to reduce the burden of creating a three-dimensional arrangement model in designing a wire harness.

  A wire harness design system according to a first aspect of the present invention is a system for designing a wire harness having a shape branched into a plurality of branch portions, each of which has a bundle of electric wires each covered with a covering material. And a harness diameter calculating means and a harness arrangement model creating means. The harness diameter calculating means calculates the diameter of the wire harness for each branch part based on the size of the diameter of the individual electric wires constituting the bundle of electric wires. The harness arrangement model creation means creates a three-dimensional arrangement model of the wire harness as a single wire having the branch portion having the diameter calculated by the harness diameter calculation means.

  In this wire harness design system, instead of creating a three-dimensional layout model of a wire harness from individual wires, a branch portion having a bundle of wires is regarded as a single wire having a diameter calculated by the harness diameter calculation means. To create a 3D layout model. For this reason, the calculation of the three-dimensional arrangement model of the wire harness becomes easy, and the creation burden of the three-dimensional arrangement model can be reduced.

  A wire harness design system according to a second invention is the wire harness design system according to the first invention, wherein the harness diameter calculating means includes a plurality of electric wire junctions inside one branch portion, Then, the diameter of the wire harness is calculated, and the diameter of the largest joint is defined as the diameter of the wire harness at the branch portion.

  When there are a plurality of electric wire joints inside one branch part, the diameter of the bundle of electric wires included in the branch part may differ depending on the number of electric wires before and after the joint part. Therefore, in this case, in this wire harness design system, the diameter of the wire harness is calculated for each joint portion, and the diameter of the largest joint portion is set as the diameter of the wire harness at the branch portion. For this reason, a wire harness can be designed so that a bundle of electric wires can easily enter a covering material when the wire harness is manufactured.

  A wire harness design system according to a third invention is the wire harness design system of the first invention or the second invention, and the harness diameter calculating means calculates the diameter of the wire harness as follows. First, the harness diameter calculating means sequentially orders the circles corresponding to the cross sections of the plurality of electric wires included in the branch portion in descending order of diameter. Next, an arrangement in which the first to third circles circumscribe each other is obtained. For the fourth and subsequent circles, out of the arrangements circumscribing two of the already arranged circles, select the arrangement that minimizes the circumscribed circle between all the already arranged circles and the circle. Is repeated to obtain the arrangement of the wires in the branch portion. And the diameter of a wire harness is computed based on the diameter of the circumscribed circle in arrangement | positioning of the electric wire calculated | required above.

  In this wire harness design system, the arrangement of the first to third circles is uniquely determined, and for the fourth and subsequent circles, an arrangement in which the circumscribed circle is the smallest among the possible arrangements is selected, This selection and arrangement is repeated. Thereby, the closest arrangement of a plurality of circles, that is, the closest arrangement of a plurality of electric wires is required. The diameter of the wire harness can be accurately calculated by using the diameter of the circumscribed circle in the close-packed arrangement.

  A wire harness design system according to a fourth invention is the wire harness design system according to the third invention, wherein the harness diameter calculating means multiplies the diameter of the circumscribed circle in the arrangement of the electric wires by a predetermined margin rate to thereby increase the wire harness. The diameter is calculated.

  In this wire harness design system, when calculating the diameter of the wire harness, the diameter of the circumscribed circle is multiplied by a predetermined margin rate, whereby the diameter of the wire harness can be calculated with higher accuracy. Here, as the margin ratio, for example, a value in consideration of the size of the gap between the covering material covering the electric wire and the bundle of electric wires, the thickness of the covering material, or the like is used.

  A wire harness design method according to a fifth aspect of the present invention is a design method for a wire harness having a shape branched into a plurality of branch portions, each of which has a bundle of electric wires each covered with a covering material, A harness diameter calculating step for calculating the diameter of the wire harness for each branch portion based on the size of the diameter of each electric wire constituting the bundle of wires, and one branch portion having a diameter calculated in the harness diameter calculating step. A harness arrangement model creating step of creating a three-dimensional arrangement model of a wire harness as a wire.

  In this wire harness design method, instead of creating a three-dimensional layout model of a wire harness from individual wires, a branch portion having a bundle of wires is regarded as a single wire having a diameter calculated in the harness diameter calculation step. To create a 3D layout model. For this reason, the calculation of the three-dimensional arrangement model of the wire harness becomes easy, and the creation burden of the three-dimensional arrangement model can be reduced.

  A wire harness design program according to a sixth aspect of the invention is a program for designing a wire harness having a shape branched into a plurality of branch portions, each of which has a bundle of electric wires each covered with a covering material. A harness diameter calculating step for calculating the diameter of the wire harness for each branch portion based on the size of the diameter of each electric wire constituting the bundle of wires, and the branch portion having a diameter calculated in the harness diameter calculating step. A harness arrangement model creation step of creating a three-dimensional arrangement model of a wire harness as a single wire is executed by a computer.

  In this wire harness design program, instead of creating a three-dimensional layout model of a wire harness from individual electric wires, a bundle of electric wires is regarded as a single wire having the diameter calculated in the harness diameter calculation step described above, and the tertiary Create the original placement model. For this reason, the calculation of the three-dimensional arrangement model of the wire harness becomes easy, and the creation burden of the three-dimensional arrangement model can be reduced.

  A wire harness design program according to a seventh aspect of the invention is a program for designing a wire harness having a shape branched into a plurality of branch portions, each of which has a bundle of electric wires each covered with a covering material. A harness diameter calculating step for calculating the diameter of the wire harness for each branch portion based on the size of the diameter of the individual wires constituting the bundle of wires, and the diameter of the wire harness calculated in the harness diameter calculating step Creating a harness information data including a value and usable for creating a three-dimensional layout model of the wire harness.

  This wire harness design program can create harness information data including the dimension value of the diameter of the wire harness calculated in the harness diameter calculation step. For this reason, for example, in a computer in which a three-dimensional CAD program is installed, a three-dimensional arrangement model can be created using this harness information data. As a result, it is possible to create a three-dimensional arrangement model by regarding a plurality of electric wires as a single wire having the diameter of the wire harness, and to reduce the burden of creating the three-dimensional arrangement model in designing a wire harness. it can.

  In the present invention, instead of creating a three-dimensional arrangement model of a wire harness from individual electric wires, a branch portion having a bundle of electric wires is regarded as a single wire having a diameter calculated by the harness diameter calculating means and is three-dimensional. By creating the placement model, the calculation of the three-dimensional placement model of the wire harness becomes easy, and the creation burden of the three-dimensional placement model can be reduced.

<Configuration of wire harness design system>
FIG. 1 shows a hardware configuration of a wire harness design system 1 according to an embodiment of the present invention. This wire harness design system 1 is a system for designing a wire harness (see FIG. 12) having a shape branched into a plurality of branch portions and having a bundle of electric wires in which each branch portion is covered with a covering material. The control unit 2, the input device 3, the display device 4, the output device 5, and the storage device 6 are provided. The control unit 2 includes a CPU, an internal memory, and the like, and is connected to an input device 3 such as a keyboard and a pointing device, a display device 4 such as a monitor, an output device 5 such as a printer, and a storage device 6 such as a hard disk. Yes. A functional block diagram of the wire harness design system 1 is shown in FIG. The wire harness design system 1 includes a circuit diagram creation unit 11, a layout diagram creation unit 12, a harness diameter calculation unit 13, a harness arrangement model creation unit 14, and a component diagram creation unit 15.

[Circuit diagram creation means 11]
The circuit diagram creating means 11 creates a circuit diagram of a wire harness as shown in FIG. 3 based on information input by the input device 3 or the like. Information input by the input device 3 or the like includes information indicating the connection relationship of the connector terminals, and the wire number, nominal number, color, material, and the like of the wires connecting the connector terminals to each other. These data are stored in the storage device 6 as inter-terminal connection information data and electric wire information data, respectively. For example, for the connector CN-P01 in the circuit diagram of the wire harness shown in FIG. 3, the inter-terminal connection information data and the wire information data are as shown in FIG. Here, the wire number “026” is connected to the terminal number “3” of the connector number “P01”, and the nominal number of this wire is “0.5”. “Nominal number” is a number corresponding to the diameter of the electric wire. In this wire harness design system 1, a table showing the correspondence between the nominal number and the diameter for each material is prepared in advance. For example, from the table of the material “AVS” shown in FIG. 4B, the diameter of the wire with the nominal number “0.5” is “2 mm”. Also, as shown in FIG. 4A, the terminal number “1” of the connector number “P01” is connected to the wire number “016”, and this wire is connected to the terminal number “M05”. It is also connected to the terminal with the number “1”. The connector number of the inter-terminal connection information data regarding the terminal number “3” is “D”. This is because the electric wire “026” connected to the terminal of the terminal number “3” is shown in FIG. It shows that it is connected to the junction “D” of the electric wire. Thus, the information regarding the junction part of electric wires is also contained in the connection information data between terminals. In the present embodiment, the identification number is used as information corresponding to the diameter of the electric wire, but the dimension value of the diameter of the electric wire may be directly used.

[Layout diagram creation means 12]
The layout diagram creating means 12 creates a layout diagram as shown in FIG. 5, for example, based on information input by the input device 3 or the like. The information input by the input device 3 or the like is information indicating the connection relationship between the connector and the branch point of the wire harness, and includes the connector number or branch point number of the connection destination and the connection direction. These pieces of information are stored in the storage device 6 as branch information data. For example, for the branch point TP02 in the layout diagram shown in FIG. 5, the branch information data is as shown in FIG. Here, it is shown that the branch point TP02 is connected to the branch point TP01 from the right side. In FIG. 6, “R1” indicates that the connection is made from the right side to one branch point (“TP03” in FIG. 5), and “L1” indicates one branch from the left side. It shows that it is connected by the part. When the connection destination is not a branch point but a connector (“R13” in FIG. 5), since the connection direction is uniquely determined, only the number of branch portions is shown.

  In the layout diagram, branch numbers (“W1” to “W9” in FIG. 5) are attached to the branch portions connecting the branch points or the branch points to the connectors, and the wires included in the branch portions are connected. It is specified from the inter-terminal connection information data, the electric wire information data, and the branch information data. Information regarding the branch number indicating the branch portion and the specified electric wire is stored in the storage device 6 as bundle information data.

[Harness diameter calculation means 13]
The harness diameter calculation means 13 calculates the diameter of the wire harness for each branch portion based on the size of the diameter of the individual electric wires constituting the bundle of electric wires. Specifically, the harness diameter calculation means 13 calculates the diameter of the wire harness based on the flow shown in FIG.

  First, in the 21st step S21, the order of circles corresponding to electric wires is determined. Here, the harness diameter calculation means 13 orders the N circles corresponding to the cross sections of the N electric wires included in the branch part to be calculated in order from the largest diameter (see FIG. 8). . 8 to 10 show a procedure for calculating the diameter of the wire harness for the branch portion W1 in the layout diagram shown in FIG. 5 as an example. The branch portion W1 includes two wires having a nominal number of 1.25, four wires having a length of 0.85, and four wires having a number of 0.5.

  In the 22nd step S22, an arrangement in which the first to third circles circumscribe each other is obtained (see FIG. 9A). The arrangement of the first to third circles is uniquely determined.

  In a 23rd step S23, possible arrangements of the nth circle (n = 4, 5,... N) are calculated. Here, an arrangement in which the nth circle circumscribes two of the already arranged circles is calculated, and a plurality of arrangement candidates are calculated as possible arrangements of the nth circle (FIG. 9). (See (b)).

  In the 24th step S24, the diameter of the circumscribed circle is calculated for each of the plurality of arrangements obtained in the 23rd step S23.

  In the 25th step S25, the arrangement having the smallest diameter of the circumscribed circle is selected from the plurality of arrangements obtained in the 23rd step S23 and determined as the arrangement of the nth circle. For example, in the fourth circle, there are three candidates that circumscribe two of the already arranged circles, and among these candidates, an arrangement that minimizes the circumscribed circle is selected ( (See FIG. 9C).

  Then, the 23rd step S23 to the 25th step S25 are repeated until the last Nth circle (see the 26th step S26).

  Thus, for the fourth and subsequent circles, an arrangement in which the circumcircle between all the already arranged circles and the circle is among the arrangement candidates circumscribing two of the already arranged circles is minimized. Is selected. Then, by repeating the above selection and arrangement for all the fourth and subsequent circles, the arrangement of all the electric wires included in the branch part to be calculated is obtained (see FIG. 10).

  When the arrangement of all the Nth electric wires is obtained, in the 27th step S27, the diameter of the circumscribed circle in the obtained electric wire arrangement is calculated as the diameter of the bundle of electric wires included in the branch portion to be calculated. .

  In the 28th step S28, the diameter of the wire harness is calculated based on the diameter of the circumscribed circle obtained in the 27th step S27. Here, the diameter of the wire harness is calculated by multiplying the diameter of the circumscribed circle obtained in the 27th step S27 by a predetermined margin rate. As the margin ratio, a value in consideration of the size of the gap between the covering material and the bundle of electric wires, the thickness of the covering material, etc. is used, preferably 1.0 to 1.15, more preferably 1.1. FIG. 11 shows a result of comparing the calculated value obtained by the above calculation with the actually measured value in the actually manufactured wire harness for a plurality of wire harnesses with a margin ratio of 1.1. From FIG. 11, it can be seen that by calculating the diameter of the wire harness with a margin rate of 1.1, a calculated value close to the actually measured value can be obtained. With respect to the branch portion W1 described above, the diameter of the circumscribed circle calculated from the arrangement of the electric wires shown in FIG. 10 is 8.497 mm, and the wire harness of the wire harness is considered in consideration of the margin ratio 1.1 and the tape thickness 0.4 mm. The diameter is calculated to be 9.7467 mm.

  In addition, like the branch part W8 of the layout diagram of FIG. 5, when one branch part includes a plurality of electric wire joints A to F, the harness diameter calculation means 13 is provided for each of the joints A to F. The diameter of the wire harness is calculated, and the diameter of the largest joint is set as the diameter of the wire harness at the branch portion W8. Thereby, even when it has a part where the number of the electric wires located inside differs, such as branch part W8, the diameter of an appropriate wire harness can be calculated, and the bundle of electric wires at the time of manufacture of a wire harness The wire harness can be designed so as to easily enter the covering material.

  The harness diameter calculation means 13 calculates the diameters for all the branch portions constituting the wire harness as described above. Moreover, the harness diameter calculation means 13 calculates a curvature radius based on the calculated diameter of the wire harness, and stores it in the storage device 6 as harness information data together with the dimension value of the diameter of the wire harness. This harness information data can be used to create a three-dimensional placement model by harness placement model creation means 14 described later.

[Harness layout model creation means 14]
The harness arrangement model creation means 14 creates a three-dimensional arrangement model of the wire harness as shown in FIG. 12 by using the branch portions constituting the wire harness as a single wire having the diameter calculated by the harness diameter calculation means 13. To do. The harness arrangement model creation means 14 creates a three-dimensional arrangement model of the wire harness using the three-dimensional arrangement and orientation of each connector, the arrangement and orientation of the branch points of the wire harness, and the harness information data described above. . That is, the harness arrangement model creation means 14 arranges the branch portions of the wire harness so as to connect the respective connectors whose arrangement and orientation are determined and the branch points. Here, the branch part of a wire harness is arrange | positioned on a three-dimensional arrangement | positioning model as one wire which has the diameter and curvature radius of the branch part contained in harness information data. And the harness arrangement | positioning model preparation means 14 calculates the length of each branch part based on the produced three-dimensional arrangement model, and preserve | saves it in the memory | storage device 6 as harness length information data.

[Parts drawing creation means 15]
The component diagram creation means 15 creates a component diagram for use in manufacturing a wire harness using the above-described inter-terminal connection information data, wire information data, branch information data, bundling information data, harness length information data, and the like. (See FIG. 13). In this component diagram, the length of each branch portion is described in addition to the inter-terminal connection information and electric wire information of the connector included in the wiring diagram described above, and the branch information included in the layout diagram.

  The circuit diagram, layout diagram, three-dimensional layout model, and component diagram created as described above can be displayed on the display device 4 and output by the output device 5.

<Control flow in wire harness design system 1>
Next, a control flow executed in the wire harness design system 1 will be described with reference to FIG.

  In the first step S1, a circuit diagram is created. Here, as described above, the circuit diagram creation unit 11 creates a circuit diagram using information input via the input device 3.

  In the second step S2, connection information data between terminals is created. Here, the information regarding the connection between the terminals input in the creation of the circuit diagram is stored in the storage device 6 as the inter-terminal connection information data. Similarly, electric wire information data is created in the third step S3.

  In the fourth step S4, a layout diagram is created. Here, as described above, the layout diagram creating means 12 creates a layout diagram using information input via the input device 3.

  In the fifth step S5, branch information data is created. Here, the information regarding the branch of the wire harness input in the creation of the layout diagram is stored in the storage device 6 as branch information data.

  In the sixth step S6, bundle information data is created. Here, the bundle information data is created by the layout diagram creating means 12 and stored in the storage device 6.

  In the seventh step S7, the wire harness diameter is calculated. Here, as described above, the wire diameter of each branch portion is calculated by the harness diameter calculation means 13.

  In the eighth step S8, harness information data including the dimension value of the diameter of the wire harness is created and stored in the storage device 6.

  In the ninth step S9, a three-dimensional arrangement model is created. Here, the harness arrangement model creation means 14 creates a three-dimensional arrangement model.

  In the tenth step S10, the length of the branch portion is calculated. Here, the harness arrangement model creation means 14 calculates the length of each branch portion of the wire harness based on the three-dimensional arrangement model.

  In the eleventh step S11, harness length information data is created. Here, the harness arrangement model creation means 14 creates harness length information including the length of each branch portion of the wire harness and stores it in the storage device 6.

  Then, in the twelfth step S12, a part drawing is created. Here, as described above, the component diagram creating means 15 creates a component diagram using the terminal connection information data, the wire information data, the branch information data, the bundle information data, the harness length information data, and the like.

<Features>
In the wire harness design system 1, a three-dimensional arrangement model of a wire harness is not created from individual wires, but each branch portion of the wire harness having a bundle of wires has a diameter calculated by the harness diameter calculation means 13. A three-dimensional arrangement model is created by regarding it as a single wire. For this reason, the calculation of the three-dimensional arrangement model of the wire harness becomes easy, and the creation burden of the three-dimensional arrangement model can be reduced.

  A wire harness design program according to an embodiment of the present invention is for causing a computer having the above-described hardware configuration to execute the steps of the above-described control flow. A creation unit 11, a layout diagram creation unit 12, a harness diameter creation unit, a harness arrangement model creation unit 14, and a component diagram creation unit 15 are realized.

<Other embodiments>
A wire harness design program according to another embodiment of the present invention is a program for causing the harness diameter calculation means 13 in the above embodiment to be realized by a computer, and includes the seventh step S7 and the seventh step in the control flow. This is for causing the computer to execute 8 steps S8. For example, with respect to a two-dimensional CAD program for causing a computer to realize the circuit diagram creation means 11, the layout diagram creation means 12, and the component diagram creation means 15, a function for realizing the harness diameter calculation means 13 is provided. It is configured as a program for adding. Then, the harness information data created by the wire harness design program is used in a three-dimensional CAD program for realizing the harness arrangement model creation means 14 in a computer, and thus the three-dimensional The burden of creating a placement model can be reduced.

  The present invention has an effect of reducing the burden of creating a three-dimensional arrangement model, and is useful as a system, method, and program for designing a wire harness.

The figure which shows the hardware constitutions of a wire harness design system. The functional block diagram of a wire harness design system. The figure which shows an example of the circuit diagram produced by the circuit diagram creation means. The figure which shows an example of electric wire information data and terminal connection information data. The figure which shows an example of the layout figure produced by a layout figure preparation means. The figure which shows an example of branch information data. The flowchart which shows the calculation method of the diameter of a wire harness. The figure which shows one procedure of the calculation method of the diameter of a wire harness. The figure which shows one procedure of the calculation method of the diameter of a wire harness. The figure which shows arrangement | positioning of the calculated electric wire. The graph which shows the comparison with the calculated value by the said calculation method, and an actual value. The figure which shows an example of the three-dimensional layout created by the harness layout model creation means. The figure which shows an example of the component diagram created by the component diagram creation means. The flowchart of the wire harness design method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire harness design system 13 Harness diameter calculation means 14 Harness arrangement model creation means

Claims (7)

A system for designing a wire harness having a bundle of wires each having a shape branched into a plurality of branch portions, each of which is covered with a covering material,
Harness diameter calculating means for calculating the diameter of the wire harness for each branch portion based on the size of the diameter of each of the wires constituting the bundle of wires;
Harness arrangement model creating means for creating a three-dimensional arrangement model of the wire harness as a single wire having the diameter calculated by the harness diameter calculating means for the branch portion;
A wire harness design system comprising: The harness diameter calculating means calculates the diameter of the wire harness for each of the joint portions when there are a plurality of joint portions of the electric wire inside one branch portion, and sets the diameter of the largest joint portion to The diameter of the wire harness in the branch portion,
The wire harness design system according to claim 1. The harness diameter calculating means includes
In order from the largest diameter to the plurality of circles corresponding to the cross section of the plurality of electric wires included in the branch portion,
Find the arrangement where the 1st to 3rd circles circumscribe each other,
For the fourth and subsequent circles, the arrangement that circumscribes two of the already arranged circles and the circle that circumscribes all the already arranged circles and the circle concerned is selected, and this is selected. By repeating, the arrangement of the electric wire in the branch portion is obtained,
Calculate the diameter of the wire harness based on the diameter of the circumscribed circle in the arrangement of the electric wires,
The wire harness design system according to claim 1 or 2. The harness diameter calculating means calculates the diameter of the wire harness by multiplying a diameter of a circumscribed circle in the arrangement of the electric wires by a predetermined margin rate,
The wire harness design system according to claim 3. A method of designing a wire harness having a shape branched into a plurality of branch parts, each of which has a bundle of electric wires each covered with a covering material,
A harness diameter calculating step for calculating the diameter of the wire harness for each branch portion based on the size of the diameter of each of the wires constituting the bundle of wires; and
A harness placement model creating step for creating a three-dimensional placement model of the wire harness as a single wire having the diameter calculated in the harness diameter calculating step for the branch portion;
A wire harness design method comprising: A program for designing a wire harness having a bundle of wires each having a shape branched into a plurality of branch portions, each of which is covered with a covering material,
A harness diameter calculating step for calculating the diameter of the wire harness for each branch portion based on the size of the diameter of each of the wires constituting the bundle of wires; and
A harness placement model creating step for creating a three-dimensional placement model of the wire harness as a single wire having the diameter calculated in the harness diameter calculating step for the branch portion;
Wire harness design program to make a computer execute. A program for designing a wire harness having a bundle of wires each having a shape branched into a plurality of branch portions, each of which is covered with a covering material,
A harness diameter calculating step for calculating the diameter of the wire harness for each branch portion based on the size of the diameter of each of the wires constituting the bundle of wires; and
Including the dimension value of the diameter of the wire harness calculated in the harness diameter calculating step, and creating harness information data usable for creating a three-dimensional arrangement model of the wire harness;
Wire harness design program to make a computer execute.

Images