JP2003151383A - Wire harness designing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire harness designing method capable of enhancing efficiency of designing work all the more. SOLUTION: The wire harness designing method is a method of designing a wire harness by using a wire harness designing system. It is provided with a process of preparing harness design data which is three dimensional design data of a wire harness and accessory data which is three dimensional design data of an accessory added to the wire harness, and a process of displaying the harness design data and the accessory data in a virtual three dimensional space displayed in a display device 11 of a computer body 16 by inputting a command in the computer body 16 via an input device 14, and adding the accessory data to the harness design data by changing at least a physical relationship between the two in the virtual three dimensional space and changing a three dimensional shape of the harness design data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire for designing a wire harness by displaying harness design data, which is three-dimensional design data of a wire harness, in a virtual three-dimensional space displayed on a display means of a computer. The present invention relates to a harness design method.

[0002]

2. Description of the Related Art Generally, wire harnesses are used as electric wiring in automobiles and electric appliances. In manufacturing this wire harness, first, for wiring objects such as automobiles and electric appliances, a three-dimensional wiring design of the wiring harness was performed based on the mounting positions of various parts in the wiring objects. Then, based on the three-dimensional wiring design result, a drawing of the wire harness is designed on a two-dimensional design sheet. Then, according to the design of the wire harness drawn in this drawing, a plurality of supporting jigs 2 are attached on the drawing board 1 as shown in FIG. 20, and a plurality of electric wires are bundled and supported by the supporting jig 2, The wire harness 3 is produced by tightening it with resin tape.

The wire harness 3 created in this way
On the other hand, in the past, when evaluating the completeness of the design with the production drawing, the
There is a method in which a dimensional drawing is created and output by a design support system such as CAD, and the designer checks the drawing to identify problems.

In addition, a prototype of the wire harness 3 is manufactured, and the prototype is actually arranged on the wiring object 4 such as an automobile or an electric appliance as shown in FIG. There is also a method of examining whether or not the design of the wire harness is proper by examining the suitability for the wiring object 4.

Reference numeral 5 in FIGS. 20 and 21 indicates a connector for connecting various components.

[0006]

In the method in which the designer looks at the drawing and evaluates the problem, the evaluation criterion differs depending on the skill of the designer, and it is difficult to create a unified evaluation criterion.

On the other hand, a prototype 3 was actually produced,
The method of wiring the prototype 3 to the wiring target 4 is advantageous in that it is possible to satisfactorily extract three-dimensional problems.

[0008] However, generally, the assembly process of the wire harness almost depends on the manual work, and therefore, the work of producing the prototype also requires human resource intensive work, so that much labor is required. Not only will it be necessary, but the time spent will be enormous.

If any problem occurs such as insufficient dimensions or an unreasonable load on the mounting angle when the prototype is attached to the wiring object, design of the wire harness and production of the prototype are required. I have to start over. Therefore, it takes an extremely large amount of time and effort to examine the suitability of the wiring state of the wire harness designed for drafting (wiring examination), and as a result, the development period until the design is completed is prolonged. There was a problem.

Therefore, the applicants of the present application filed Japanese Patent Application No. 2001-2001.
178980 and Japanese Patent Application No. 2001-208233,
It proposes a harness design method and a technique related to the harness design method that can perform efficient design work.

An object of the present invention is to provide a wire harness designing method, which is related to the technique according to the above application, and which can further improve the efficiency of designing work.

[0012]

The technical means for achieving the above object is as follows. Harness design data, which is three-dimensional design data of a wire harness, is stored in a virtual three-dimensional space displayed on a display means of a computer. A wire harness designing method for displaying and designing a wire harness, comprising: preparing the harness design data; and preparing accessory data that is three-dimensional design data of accessory parts attached to the wire harness. The virtual 3 displayed on the display means on the computer by inputting instructions to the computer through the steps and the input means.
A step of displaying the harness design data and the accessory data in a three-dimensional space and changing the positional relationship between at least the two in the virtual three-dimensional space to attach the accessory data to the harness design data. And are provided.

[0013] Preferably, the accessory data includes exterior component data which is three-dimensional design data of an exterior component mounted on the wire harness, and the accessory component data is attached to the harness design data. By inputting an instruction to the computer via the input means, the computer is caused to change the positional relationship between the harness design data and the exterior component data in the virtual three-dimensional space, and at least the harness design data is obtained. It is preferable to attach the exterior component data to the harness design data by changing the route shape of a part of the section.

Further, preferably, the accessory data includes electrical connecting means data which is three-dimensional design data of an electrical connecting means connected to the wire harness, and the accessory data is used as the harness design data. In the step of attaching, by inputting an instruction to the computer via the input means, the computer is caused to change the positional relationship between the harness design data and the electrical connection means data in the virtual three-dimensional space, and It is preferable that the electrical connection means data is attached to the harness design data by changing the route shape of at least a part of the harness design data.

Further preferably, in the step of attaching the accessory data to the harness design data, a plurality of harness design data having different forms generated in the attachment process when attaching the accessory data to the harness design data and The accessory data is stored in the computer, and the wire harness design method is
It is preferable to further include a step of sequentially displaying the plurality of harness design data and accessory data stored in the computer on the computer through the display means in an order according to the attaching process.

[0016] Preferably, in the step of attaching the accessory data to the harness design data, the accessory data in the virtual three-dimensional space and a previously registered structure that may be an obstacle to the attachment of the accessory data. It is preferable that the computer detects the interference with the object data, and when the interference is detected, the computer outputs the notification.

Further, preferably, in the harness design data, a constraint point whose position is fixed in the virtual three-dimensional space can be set by an instruction input to the computer via the input means, and the input means is used. By inputting an instruction to the computer via the above, a part of the harness design data in the virtual three-dimensional space is a distance between the part in the virtual three-dimensional space and the constraining point of an electric wire path between them. When it is moved so as to be longer than the line length, the computer is caused to generate a shredding portion in the electric wire path between the part and the restraint point, and the image display showing the shredding portion is displayed on the display means. It is better to let them do it through.

Further, preferably, in the harness design data, a plurality of constraint points whose positions are fixed in the virtual three-dimensional space can be set by inputting an instruction to the computer via the input means, and the input is made. When the line length of the electric wire path between the constraint points of the harness design data is changed by the instruction input to the computer via the means so as to be equal to or less than the distance between the constraint points in the virtual three-dimensional space. In addition, it is preferable that the computer generate a breaking point in the electric wire path between the restraint points and display an image showing the breaking point via the display means.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION <Description of Prerequisite Technical Configuration> FIG. 1 is a block diagram of a wire harness design system used in a wire harness design method according to an embodiment of the present invention. This wire harness design system
As hardware resources, as shown in FIG. 1, a display device (display means) 11 such as a CRT display and a keyboard 12 are provided.
And an input device (input means) 14 such as a mouse 13, a storage device (storage means) 15 such as a hard disk drive, and a computer main body (control means) 16 including a CPU, a main memory and the like. The storage device 15 stores a software program that defines a processing procedure when the CPU of the computer main body 16 performs arithmetic processing using various data in the storage device 15 based on an input operation from the input device 14. There is.

Although not shown, as the data input means for inputting data, in addition to the input device 14, a medium reading device for reading a recording medium such as a magnetic disk or a LAN (local area network)
A communication device or the like that receives data by communication through a communication path such as is also included.

The wire harness design system configured as described above operates by a software program stored in advance in the storage device 15.

By using this wire harness design system, the harness design data A (see FIG. 8 etc.), which is the three-dimensional design data of the wire harness, is displayed in the virtual three-dimensional space displayed on the display device 11. It is possible to perform virtual assembly of the wire harness (including virtual wiring to the vehicle body), and design of the wire harness and its assembly board by displaying in.

The harness design data A created using the wire harness design system and the drawing board design data D (see FIG. 8) which is three-dimensional design data of the assembly drawing board are temporarily stored in the storage device 15. Saved. The drawing board design data D includes auxiliary jig data E1, E2, E3, ... (collectively referred to as auxiliary jig data corresponding to auxiliary jigs provided on the drawing board for holding the wire harness on the assembly drawing board). In this case, the symbol “E” is used) (see FIG. 8 and the like).

Here, a method of creating the harness design data A and its contents will be briefly described. The harness design data A is electronic data in which two-dimensional electronic data (two-dimensional electronic data) when manufacturing on a two-dimensional flat drawing board is displayed in three-dimensional coordinates.

First, in creating the harness design data A, based on the above-mentioned two-dimensional electronic data, each size such as the length dimension from the branch of the wire harness to the branch position and the connector mounting position is set in the wire harness design system. After designing in 2D, create a 2D drawing (drawing) of the wire harness in consideration of actually manufacturing the wire harness on the drawing board as 2D electronic data using a design support software program such as CAD. To do.

Next, in the computer main body 16,
A coordinate axis (z axis) in the normal direction is added to the coordinate plane (xy plane) of the input two-dimensional electronic data, and the two-dimensional electronic data is stored in the storage device 15 as the harness design data A.
Keep it inside. The input device 1 is used as a method for inputting the two-dimensional electronic data to the computer body 16.
4 may be manually input, but the three-dimensional electronic data created by another CAD system may be transferred to the computer main body 16 through communication or a predetermined recording medium such as a magnetic disk. .

Here, as the information input as the two-dimensional electronic data, as shown in FIG. 2, 2 of each node n01 to n20 for specifying the shape of each electric wire which constitutes the wire harness on the drawing board. Dimensional coordinate information, each node n01-
Link information of the electric wire indicating that n20s are connected to each other,
Diameter r01 of electric wire connected between nodes n01 to n20
r14 etc.

Further, in the step of deforming the harness design data A, which will be described later, in order to enable the realistic deformation of each wire of the wire harness, the wire 21 having the center line 21a as shown in FIG. 4 is divided into a plurality of short line a (joints) 22 as shown in FIG.
Considering that each electric wire 21 is deformed in units of 2,
The length dimension a of each wire piece 22 is input. The length a is preferably about 10 mm. The length of each line piece 22 may be the same or may be set as different values separately. The electric wire 21 having a length L is finely divided by the plurality of wire pieces 22.

Further, weighting data for each of a plurality of electric wires forming the wire harness is input (described later). This weighting data is a parameter that means how difficult it is for each wire to deform in the harness design data A deformation step, which will be described later. The larger the weighting data value, the more difficult it is for the wire to move and With respect to the bending deformation, the electric wire having a larger weighting data value is not bent only at the deformation point, but is bent over the entire electric wire. The weighting data is data empirically obtained by a bending test or the like according to various factors such as the diameter of each electric wire.

With the creation of such harness design data A, the design of an assembly drawing board for assembling a wire harness corresponding to the harness design data A is also performed.
This is done using the wire harness design system.

Here, in the shape representation based on general harness design data A, for example, in the case of representing each wire piece 22 of an individual electric wire 21 or a group of a plurality of electric wires (electric wire bundle),
It will be expressed using a cylindrical shape as shown in FIGS. 3 and 4.

Specifically, as shown in FIG. 5, a vector S having a length in the direction passing through the center of the cylinder is defined for the data of the line segment 22 having the length a. The vector S is x
From the reference point by the twist angle (rotation angle about the line axis) θ between the direction information and the length information in the three-dimensional space consisting of the axes, the y-axis and the z-axis, and another continuous line piece 22. By specifying the rotation angle information of, only the absolute position and the degree of twist can be specified and set.

The data of the individual line pieces 22 are displayed as being continuously connected to each other (continuous connection). Here, as a method of continuous connection, as shown in FIG.
When connecting the line piece 22a and the line piece 22b, the coordinates of the end points of the central axes 23a and 23b are made to coincide with each other.

The harness design data A thus created can be three-dimensionally transformed in the virtual three-dimensional space by using the input device 14 such as the mouse 13, and by utilizing this characteristic, the harness design data A can be obtained. By three-dimensionally transforming the design data A in the virtual three-dimensional space, it is possible to virtually perform the wiring work (attachment work) of the wire harness to the vehicle body.

In this wire harness design system,
The following processing is performed in order to enable flexible characteristic expression as the designer wishes.

The recognition of each line piece 22 in the computer main body 16 is performed by the vector S in the three-dimensional space as described above.
The vector variables (x, y, z, θ) are used. In addition,
The variable θ is as shown in FIG.
It means a twist angle generated between the two 22b. In addition,
In FIG. 7, for simplicity, the z axis is omitted and illustrated on the x, y plane, but it goes without saying that the same applies to the three-dimensional coordinates to which the z axis is added.

For example, in FIG. 7, it is assumed that the vector S of the five line pieces 22 has the following values.

Vector S1 = (X1, Y1, Z, θ) Vector S2 = (X2, Y2, Z, θ) Vector S3 = (X3, Y2, Z, θ) Vector S4 = (X4, Y1, Z, θ) ) Vector S5 = (X5, 0, Z, θ) In this state, the vector setting is performed and the end point of each line piece 22 is designated by the input device 14 such as the mouse 13 and is called dragging of the mouse 13. The end point of the line piece 22 is moved in the three-dimensional space by a special operation.

Also in this case, for example, at the connection point 24 between the line pieces 22a and 22b as shown in FIG. 6, since the pair of line pieces 22a and 22b on both sides are kept in a continuous state, the end points of each line piece 22 are maintained. When the position movement process is performed, the result of the continuous connection expresses the bending of the wire harness. That is, the line pieces 22 that are continuous with each other move so that when tension is applied to one of the line pieces, the other line piece 22 moves at that time. It is set by a predetermined arithmetic expression based on an empirical rule so as to depend on the variation vector of the continuous connection point with and. By such processing, the wire harness can be deformed without losing the information on the continuity of all the electric wires.

However, for example, when the position of the point (X5, 0) in FIG. 7 is moved and changed by the input device 14 such as the mouse 13, the degree of influence on other connection points due to this is different. . That is, the amount of movement with respect to another connection point close to the point moved with the input device 14 such as the mouse 13 is larger than the amount of movement with respect to another connection point far away. Here, it is assumed that the values after changing the position of each connection point are as follows.

Vector S1 = (X1, Y1, Z, θ1) Vector S2 = (X2, Y2, Z, θ2) Vector S3 = (X3, Y2, Z, θ3) Vector S4 = (X4, Y1, Z, θ4) ) Vector S5 = (X5, 0, Z, θ5) In this case, θ1 <θ2 <θ3 <θ4 <θ5. Accordingly, the curved shape of the wire harness can be expressed both in terms of absolute coordinates and relative degree of twist, and other flexible expressions such as bending can be freely performed. The relational expressions of θ1 to θ5 are set in advance based on empirical rules and the like by bending tests and the like, and are defined in advance as a software program that regulates the operation of the wire harness design system.

Further, in the wire harness, regarding the influence of different electric wires, a weighting parameter which means the difficulty of deformation of each electric wire is considered. That is, by using a predetermined arithmetic expression, an electric wire with a larger weighting data value has a smaller movement amount during deformation, and as for the electric wire bending deformation, an electric wire with a larger weighting data value has only a deformation point. Instead of deforming, gently bend over the wire.

<Description of Characteristic Parts of the Present Embodiment> In the wire harness designing method according to the present embodiment, accessory parts to the wire harness (exterior parts such as protectors and outer tubes, and electrical connection means such as an electrical connection box). ) Is virtually attached in the virtual three-dimensional space using the harness design data A and the accessory data F of the accessory, and the harness and the accessory are attached in a state before the wire harness is actually created. It is possible to study the design contents of parts and the installation work process.

First, as a preparatory step, the harness design data A as shown in FIG. 8 is created using the wire harness design system as described above, or the harness design data A created by another system is used as a wire. Need to be incorporated into the harness design system. In addition, the accessory data F (see FIG. 9), which is the three-dimensional design data of the accessory provided in the wire harness, is created by using the wire harness design system, or the accessory data F is created by the wire harness design system. Need to be taken into. Here, the virtual attaching step of the protector will be described first. In FIG. 8, reference symbols C1 to C5 represent connector data that is three-dimensional design data of the connector.

FIG. 10 is a process diagram of a process of virtually attaching the protector to the wire harness. First, in step S1 of FIG. 10, by inputting an instruction to the computer main body 16 via the input device 14, the computer main body 16 is displayed in the virtual three-dimensional space of the display device 11 as shown in FIG. The harness design data A installed on the drawing board design data D and the accessory data F1 of the protector are displayed, and the connector data C is moved in order to move the portion of the harness design data A which is an obstacle to the attachment of the protector.
3 is removed from auxiliary jig data E5, and connector data C3
Is moved in the direction away from the protector mounting portion (left side in FIG. 11). Here, the movement of a part or the whole of the harness design data A in the virtual three-dimensional space, the three-dimensional deformation of the harness design data A, and the movement of the accessory data F1 are performed by a drag operation using the mouse 13 or the like. Done by.

In the following step S2, an instruction is input through the input device 14, the accessory data F1 is moved in the direction approaching the harness design data A as shown by an arrow 31 in FIG. 11, and as shown in FIG. And accessory data F
1 is set to the attachment position of the harness design data A.

In the following step S3, an instruction is input through the input device 14 to remove the connector data C3 and C5 from the auxiliary jig data E7 and E8 as shown in FIG.

In the following step S4, an instruction is input through the input device 14 to three-dimensionally deform the electric wire path of the protector mounting portion or the like of the harness design data A, as shown in FIG.
And as shown in FIG. 14, the protector attachment portion of the harness design data A is accommodated in the electric wire accommodation portion (here, groove-shaped accommodation concave portion) 33 of the accessory data F1. At this time, as shown in FIG. 14, the harness design data A is set so that the center line of the electric wire overlaps with the center line 35 of the accessory data F1.
Will be housed.

In the following step S5, an instruction is input through the input device 14, and the cover 37 of the accessory data F1 is closed as shown in FIG.

In a succeeding step S6, virtual tape winding processing for fixing a protector or the like is performed by inputting an instruction through the input device 14. In this virtual tape winding process, tape roll data 39 (see FIG. 16) indicating the three-dimensional shape of the tape roll is created in advance,
The tape roll data 39 is displayed in a virtual three-dimensional space as shown in FIG. 16, and around the portion where the tape is wound (here, around both ends of the protector attachment portion).
Then, it is carried out by rotating the tape as shown by the arrow 41, and it is examined whether or not there is any inconvenience in the tape winding process (for example, whether or not there is contact with other obstacles during the winding of the tape roll). It Along with this virtual tape winding process, the tape winding portion data 43 corresponding to the tape winding portion is added to both ends of the protector attaching portion of the harness design data A, whereby the virtual attaching step of the protector is completed.

By such a virtual attaching process of the protector, it is possible to examine the design contents of the wire harness and the protector, and the attaching work process of the protector. In addition, as a result of this virtual attachment process, if the accommodated portion of the harness design data A that should be accommodated in the accessory data F1 of the protector is not accommodated in the accessory data F1 and protrudes from the accessory data F1, A mark or the like may be attached to the protruding accommodated portion so that the accommodated portion can be used when the design content is reviewed again.

Further, in the present embodiment, a plurality of harness design data A and accessory data F1 of different scene forms which occur in the attachment process when attaching the accessory data F1 to the harness design data A as described above are used. Each scene is stored in the storage device 15, and the harness design data A and accessory data F1 of each scene are reproduced and output via the display device 11. The reproduction output is performed in response to an instruction input via the input device 14. At the time of reproduction output, the stored harness design data A and accessory data F1 of each scene are virtual 3 in order in accordance with the attachment process of the accessory data F1.
It is switched and displayed in the dimensional space.

The designer decides in which scene the harness design data A and the accessory data F1 are to be stored by inputting an instruction through the input device 14. For example, the harness design data A and the accessory data F1 in the scenes shown in FIGS. 11 to 16 are stored. Also, harness design data A and accessory data F1 for each scene
The display switching timing at the time of reproduction output of can be changed by an instruction input through the input device 14.

Further, in the present embodiment, in the above-described virtual attaching step of the protector, the accessory data F1 and the like in the virtual three-dimensional space and the previously registered structure data (which may be an obstacle to the attachment of the accessory data F1 and the like ( For example, the computer main body 16 is caused to detect the interference with the auxiliary jig data E, etc., and when the interference is detected, the computer main body 16 is detected.
Is configured to make a notification output. Which one of the entities existing in the virtual three-dimensional space is to be automatically detected for interference can be set by an instruction input through the input device 14. Here, for example, the computer main body 16 is made to detect and notify the interference between the accessory data F1 of the protector and the auxiliary jig data E and the interference between the tape roll data 39 and the auxiliary jig data E.

The notification output when the interference is detected is performed, for example, by the display output via the display device 11 or the sound output via the speaker (not shown). Specific examples of the display output include a method of changing the display state of the display device 11 when interference occurs (for example, temporarily changing the display color of at least a part of the screen), or displaying a message text indicating the occurrence of interference. Methods etc. are considered.

Further, in the present embodiment, one or more positions fixed in the virtual three-dimensional space with respect to the harness design data A are input to the computer main body 16 by inputting an instruction to the computer main body 16 via the input device 14. It is possible to set the constraint point of. For example,
In the case of the harness design data A in the form of being routed to the vehicle shown in FIG. 17, points fixed or connected to the vehicle body side (for example, connector data C1 to C5 and fixed portions by clamps) are set as constraint points. To be done.

Then, by inputting an instruction to the computer main body 16 via the input device 14, a part of the harness design data A (for example, the part 51 in FIG. 17) in the virtual three-dimensional space is converted into a part (in the virtual three-dimensional space). 5
1) and the constraint point (for example, the connector C4) are moved so that the distance between them is equal to or longer than the line length of the electric wire path (for example, the direction is indicated by the arrow 52 in FIG. 17). As shown in FIG. 18, on the computer main body 16, a breaking point 53 is generated in the electric wire path between the part (51) and the restraint point (C4) and an image display showing the breaking point (here, the breaking point is shown). The virtual line is displayed corresponding to the electric wire route (1) via the display device 11.

Further, by inputting an instruction to the computer main body 16 via the input device 14, between the constraint points of the harness design data A (for example, the connector C1 in the virtual three-dimensional space).
And between the connector C4) and the line length of the electric wire path is changed to be equal to or less than the distance between the two restraint points in the virtual three-dimensional space, the computer main body 16 similarly receives both of them. A cut point (5
3) is generated, and an image display showing the fragmented portion is displayed via the display device 11.

Furthermore, in the above description, the virtual attaching step of the protector to the wire harness has been described, but the wire harness designing method according to this embodiment may be applied to the virtual attaching step of other accessory parts. For example, the connection between the wire harness and the electric junction box may be simulated. In this case, accessory data F2 (see FIG. 19), which is three-dimensional design data of the electrical junction box
Must be created in advance and stored in the storage device 15. Then, during the simulation, the computer main body 16 is caused to read the accessory data F2 from the storage device 15 by an instruction input via the input device 14, and the accessory data F2 and the harness design data A are displayed on the display device 11. Displayed in virtual three-dimensional space and attached parts data F
2 and the harness design data A are connected.

The connection is, for example, as shown in FIG.
In the virtual three-dimensional space, the harness design data A and the accessory data F2 are positioned at connectable predetermined positions, and each connector data (here, connector data C11 to C16) of the harness design data A is dragged by the mouse 13. This is performed by sequentially moving and inserting and connecting to the corresponding connecting portions G1 to G6 of the accessory data F2.

As described above, according to this embodiment, the harness design data of the wire harness and the accessory data F of the accessory (the protector and the exterior tube, such as the exterior tube, and the electrical connection means such as the electrical connection box). Using, you can virtually simulate the attachment process of attached parts to the wire harness in the virtual three-dimensional space on the wire harness design system, and immediately reflect the result of the simulation to the design contents of the wire harness. As a result, it is possible to further improve the efficiency of the wire harness design work and the like.

In addition, a plurality of harness design data A and accessory data F having different forms of scenes generated in the attachment process when attaching the accessory data F to the harness design data A in the virtual three-dimensional space are attached. Since it is sequentially displayed on the display device 11 in the order according to the above, the attachment parts are attached to the wire harness according to the harness design data A and the attachment part data F at each stage of the attachment process switched and displayed in this order. You can verify work and perform demonstrations.

Furthermore, when the accessory data F is attached to the harness design data A in the virtual three-dimensional space, when the accessory data A interferes with the structure data (auxiliary jig data E etc.) which is an obstacle. , The interference is automatically detected by the wire harness design system and output as a notification.Therefore, obstacles and other obstacles that may occur when actually attaching accessory parts to the wire harness are easily found by simulation. Can be dealt with.

In addition, a part of the harness design data A in the virtual three-dimensional space is defined as a distance between the part in the virtual three-dimensional space and the restraint point of the harness design data, and the wire length of the electric wire route between them. When it is moved so that it is longer than that, the image display will inform you of the breakage point due to the insufficient wire length that occurred in the electric wire path between the part and the restraint point. Data A
It is possible to easily recognize the point where the line length is insufficient.

Furthermore, when the line length of the electric wire path between the constraint points of the harness design data A in the virtual three-dimensional space is changed to be equal to or less than the distance between the constraint points in the virtual three-dimensional space, Since the cut point due to the shortage of the wire length generated in the electric wire path between the restraint points is displayed by the image display, the point of the shortage of the wire length in the harness design data A can be easily recognized. it can.

Further, since the main body portion of the harness design data A showing the electric wire path is constituted by connecting a plurality of wire pieces (joints) 22 along the electric wire path, the bending shape and bending characteristics of the electric wire are realistic. Can be expressed in

[0067]

According to the invention described in claims 1 to 7, the step of attaching the accessory to the wire harness in the virtual three-dimensional space using the harness design data of the wire harness and the accessory data of the accessory. Can be simulated virtually on a computer,
The result of the simulation can be immediately reflected in the design content of the wire harness, and as a result, the efficiency of the work of designing the wire harness can be further improved.

According to the second aspect of the invention, the process of attaching the exterior component to the wire harness can be easily simulated on the computer.

According to the third aspect of the invention, the step of attaching the electrical connecting means to the wire harness can be easily simulated on the computer.

According to the invention described in claim 4, a plurality of harness design data and accessory data having different forms generated in the attachment process when attaching accessory data to the harness design data in the virtual three-dimensional space, Since it is sequentially displayed on the display means in the order according to the attachment process, the attachment work of the accessory to the wire harness is performed according to the harness design data and the accessory data of each stage of the attachment process that is switched and displayed in this order. You can perform verification and demonstration.

According to the invention described in claim 5, when the accessory data is attached to the harness design data in the virtual three-dimensional space, when the accessory data interferes with the structure data which is an obstacle. Since the interference is automatically detected and output by the computer by the computer, it is possible to easily find obstacles that will be obstacles when actually attaching accessory parts to the wire harness by simulation and take measures beforehand. You can

According to the sixth aspect of the present invention, a part of the harness design data is set in the virtual three-dimensional space, and the distance between the part and the constraint point of the harness design data is set in the virtual three-dimensional space. If the wire is moved so that it is longer than the wire length of the wire path between the two parts, the cut point due to the insufficient wire length in the wire path between the part and the restraint point will be displayed by the image display. Therefore, it is possible to easily recognize the point of insufficient line length in the harness design data.

According to the invention described in claim 7, the wire length of the electric wire path between the restraint points of the harness design data in the virtual three-dimensional space is equal to or less than the distance between the restraint points in the virtual three-dimensional space. If the change is made as shown in the figure, the point of the line length shortage in the harness design data will be displayed because the cut point due to the shortage of the line length generated in the electric wire route between the restraint points is notified by the image display. Can be easily recognized.

[Brief description of drawings]

FIG. 1 is a block diagram of a wire harness design system used in a wire harness design method according to an embodiment of the present invention.

FIG. 2 is a diagram showing an image of two-dimensional data.

FIG. 3 is a diagram showing a model of an electric wire in a three-dimensional space.

FIG. 4 is a diagram showing a state in which an electric wire is divided into a plurality of wire pieces.

FIG. 5 is a diagram showing vector information of line pieces.

FIG. 6 is a diagram showing a state in which line pieces are continuously connected.

FIG. 7 is a view showing a state in which the electric wire is changed in curvature.

FIG. 8 is a diagram showing harness design data in a display form developed two-dimensionally.

FIG. 9 is a diagram showing accessory data of the protector.

FIG. 10 is a process drawing of a process of virtually attaching a protector to a wire harness.

FIG. 11 is a diagram showing a process of virtually attaching a protector to a wire harness.

FIG. 12 is a diagram showing a process of virtually attaching a protector to a wire harness.

FIG. 13 is a diagram showing a process of virtually attaching a protector to a wire harness.

FIG. 14 is a diagram showing a process of virtually attaching a protector to a wire harness.

FIG. 15 is a diagram showing a process of virtually attaching a protector to a wire harness.

FIG. 16 is a diagram showing a process of virtually attaching a protector to a wire harness.

FIG. 17 is a diagram showing harness design data in a form of being routed to a vehicle.

FIG. 18 is a diagram showing harness design data in a form of being routed to a vehicle.

FIG. 19 is a diagram showing a virtual connection process between a wire harness and an electric connection box.

FIG. 20 is a view showing an operation of manufacturing a wire harness on the drawing board.

FIG. 21 is a view virtually showing a state in which a wire harness is three-dimensionally arranged on a wiring object.

[Explanation of symbols]

11 Display 14 Input device 15 Memory device 16 computer body A harness design data F, F1, F2 accessory data D Drawing board design data E1 to E8 auxiliary jig data

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tsutomu Nakamura             Sumitomo Den 1-14 Nishi-Suehiro-cho, Yokkaichi-shi, Mie Prefecture             Sozo Co., Ltd. F term (reference) 5B046 AA04 AA07 DA10 GA01 HA05                       JA02                 5G363 AA16 BA02 DC02

Claims (7)

[Claims] 1. A wire harness design method for designing a wire harness by displaying harness design data, which is three-dimensional design data of a wire harness, in a virtual three-dimensional space displayed on a display means of a computer. By preparing the harness design data, preparing accessory data which is three-dimensional design data of the accessory attached to the wire harness, and inputting an instruction to the computer through the input means. By causing the computer to display the harness design data and the accessory part data in the virtual three-dimensional space displayed on the display means, and changing at least the positional relationship between them in the virtual three-dimensional space. And a step of attaching the accessory data to the harness design data. A method for designing a wire harness. 2. The accessory data includes exterior part data that is three-dimensional design data of an exterior part to be attached to the wire harness, and in the step of attaching the accessory data to the harness design data, By inputting an instruction to the computer via the input means, the computer is caused to change the positional relationship between the harness design data and the exterior part data in the virtual three-dimensional space, and at least one of the harness design data is set. The wire harness design method according to claim 1, wherein the exterior part data is attached to the harness design data by changing a route shape of a section of a part. 3. The step of attaching the accessory data to the harness design data, wherein the accessory data includes electrical connection means data that is three-dimensional design data of electrical connection means connected to the wire harness. In order to change the positional relationship between the harness design data and the electrical connection means data in the virtual three-dimensional space in the computer, the harness design data can be changed by inputting an instruction to the computer through the input means. The wire harness design method according to claim 1, wherein the electrical connection means data is attached to the harness design data by changing a route shape of at least a part of the section. 4. In the step of attaching the accessory data to the harness design data, a plurality of harness design data and accessory data having different forms generated in the attachment process when attaching the accessory data to the harness design data. Is stored in the computer, the wire harness design method, the plurality of harness design data and accessory data stored in the computer, the display means in the computer in the order according to the attachment process. The method for designing a wire harness according to claim 1, further comprising a step of sequentially displaying via a wire harness. 5. In the step of attaching the accessory data to the harness design data, the accessory data in the virtual three-dimensional space,
2. The computer is caused to detect an interference with pre-registered structure data, which may be an obstacle to the attachment of the accessory data, and when the interference is detected, the computer is caused to output a notification. 5. The wire harness designing method according to any one of 4 to 4. 6. In the harness design data, a constraint point whose position is fixed in the virtual three-dimensional space can be set by inputting an instruction to the computer via the input unit, and the harness design data can be set via the input unit. By inputting an instruction to the computer, a part of the harness design data in the virtual three-dimensional space is a distance between the part and the constraint point in the virtual three-dimensional space, and a wire length of an electric wire path between them. When moved as described above, the computer is caused to generate a shredding point in the electric wire path between the part and the restraint point, and an image display showing the shredded point is performed via the display means. The wire harness designing method according to any one of claims 1 to 5, wherein: 7. In the harness design data, a plurality of constraint points whose positions are fixed in the virtual three-dimensional space can be set by an instruction input to the computer via the input means, and the constraint points can be set via the input means. When the line length of the electric wire path between the constraint points of the harness design data is changed by the instruction input to the computer so as to be equal to or less than the distance between the constraint points in the virtual three-dimensional space, The computer is caused to generate a shredding portion in an electric wire path between the restraint points and to display an image showing the shredding portion via the display means.
6. The wire harness designing method according to any one of 1 to 5.