JP4964082B2 - Apparatus and method for analyzing routing route of control cable - Google Patents

Description

  The present invention relates to a control cable that transmits an operation on an input side to an output side. Specifically, the present invention relates to a technique for predicting the routing route and performance of a control cable when the control cable is attached between the input side device and the output side device.

The control cable includes an outer cable and an inner cable inserted through the outer cable. The inner cable is guided by the outer cable and is movable in the axial direction.
One end of the outer cable is fixed to the housing of the input side device. The other end of the outer cable is fixed to the housing of the output side device. The input end of the inner cable is fixed to the operation member of the input side device. The output end of the inner cable is fixed to the transmitted member of the output side device. When the operation member of the input side device is operated, the inner cable moves in the outer cable in the axial direction. Thereby, the operation applied to the operation member is transmitted to the transmitted member of the output side device.

The control cable (that is, the outer cable) is required to be routed so as not to interfere with other devices existing between the input side device and the output side device. For this reason, the attachment conditions (attachment position, attachment angle) of both ends of the outer cable, the attachment conditions (attachment position, attachment angle) of the intermediate point for attaching the outer cable, and the like are variously changed.
However, the routing route of the control cable when these conditions are changed is difficult to predict from the high deformability of the control cable (high routing flexibility). For this reason, in order to determine the routing route of the control cable, it is necessary to first determine the mounting conditions, intermediate mounting point conditions, etc. depending on the intuition of the designer. Next, an apparatus (input side apparatus and output side apparatus) is actually made as a prototype according to the conditions determined in this way. Then attach the control cable to the prototype device. If the control cable interferes with another device when the control cable is attached to the prototype device, the above-described procedure is repeated again. Therefore, in order to determine the routing route of the control cable, it was necessary to perform multiple trials and evaluations. This has led to a prolonged development period and an increase in development costs.

  Regarding the above problem, Patent Document 1 discloses a technique for calculating a routing route of a control cable using a computer. In the technique described in Patent Document 1, a control model is created by creating a calculation model that approximates a control cable with a set of finite elements, and performing numerical analysis such as a finite element method on the calculation model. Is calculated. Here, regarding the characteristics of the control cable (for example, bending rigidity, torsional rigidity, etc.), the characteristics of the outer control cable and the inner cable are obtained separately, and the characteristics of the entire control cable are obtained by combining these characteristics. Has been decided. According to the technique described in Patent Document 1, it is possible to easily determine the characteristics of the entire control cable, and it is possible to accurately predict the routing route of the control cable.

International Publication No. 2002/048923 Pamphlet

The actually arranged control cable is not always kept in a constant shape, and is partially bent or stretched according to the input load applied to the inner cable. That is, the routing route of the control cable varies depending not only on the characteristics of the control cable and its mounting conditions but also on the input load applied to the inner cable. Therefore, in order to accurately predict the routing route of the control cable, it is necessary to calculate the routing route of the control cable in consideration of the input load applied to the inner cable.
The present invention provides a technique for accurately predicting a routing route of a control cable in consideration of an input load applied to an inner cable.

  The present invention is embodied in an apparatus for analyzing a routing route of a control cable in which an inner cable is inserted into an outer cable. The device includes means for inputting outer cable characteristic data including at least the bending rigidity of the outer cable, means for inputting inner cable characteristic data including at least the axial rigidity of the inner cable, and means for inputting the length of the control cable. , Means for inputting the mounting conditions including at least the mounting position and the mounting angle of the control cable, and means for inputting the input load to the inner cable. In addition, this device uses the input outer cable characteristic data, inner cable characteristic data, and control cable length to create a control cable calculation model that approximates the outer cable and inner cable individually by a set of finite elements. Route calculation to calculate the control cable routing by performing numerical analysis using the calculation model creation means, the calculated control cable calculation model, the input control cable installation conditions and the input load to the inner cable. Means.

In this apparatus, numerical analysis is performed using a calculation model that approximates a control cable with a set of finite elements, and a routing route of the control cable is calculated. In the calculation model used in this numerical analysis, the outer cable and the inner cable are individually approximated by a set of finite elements. Thereby, when performing numerical analysis using a calculation model, it is possible to add the input load to the inner cable to the boundary condition.
According to this device, it is possible to accurately calculate the routing route of the control cable in consideration of the input load applied to the inner cable.

The apparatus described above performs numerical analysis using the calculated control cable routing path, and calculates the difference (stroke loss) between the movement amount at the input end and the movement amount at the output end of the inner cable loaded with the input load. It is preferable that a stroke loss calculating means for calculating is added.
Thereby, it is also possible to evaluate the performance related to the operation transferability when the control cable is routed along the calculated routing route.

The stroke loss calculating means described above preferably calculates the difference in the movement amount under the condition that the output end of the inner cable is fixed or movable.
According to this method, the difference (stroke loss) in the movement amount described above can be easily calculated.

The stroke loss calculation means described above divides the calculated route of the control cable by the attachment position of the control cable, and calculates the difference in the movement amount under the condition that each of the divided partial distribution route is assumed to be a simple bend. It is preferable to calculate.
According to this method, the difference (stroke loss) in the movement amount described above can be calculated more easily.

In the apparatus according to the present invention, it is preferable that the input attachment condition includes an axial rigidity and / or an axial straight rigidity supported by the control cable at the attachment position.
Thereby, it becomes possible to calculate the routing route of the control cable more accurately in consideration of the characteristics of the outer terminal and the clamp member for attaching the control cable.

The present invention is also embodied in a method for analyzing a control cable routing by a computer . In this method, the computer obtains outer cable characteristic data including at least the bending rigidity of the outer cable, the computer obtains inner cable characteristic data including at least the axial rigidity of the inner cable, and the computer acquires the length of the control cable. a step of acquiring of the computer includes a step of acquiring installation conditions of the unit and the mounting position of at least the control cable, the step of the computer obtains an input load to the inner cable. In addition, this method uses a control cable calculation model in which the outer cable and inner cable are individually approximated by a set of finite elements using the acquired outer cable characteristic data, inner cable characteristic data, and control cable length. And the computer calculates the control cable routing by performing a numerical analysis using the calculated control cable calculation model, the acquired control cable mounting conditions, and the input load to the inner cable. It has.
According to this method, it is possible to accurately calculate the routing route of the control cable in consideration of the input load applied to the inner cable.

  According to the present invention, it is possible to accurately predict the routing route of the control cable, and it is possible to shorten the development period of the device using the control cable and to reduce the development cost.

Preferred embodiments for carrying out the present invention will be listed.
(Embodiment 1) It is preferable that the routing route analyzing apparatus includes a data storage unit capable of storing various data. In this case, the data storage means preferably stores an outer cable characteristic data file, an inner cable characteristic data file, an outer terminal characteristic data file, a clamp characteristic data file, and the like. Here, the outer cable characteristic data file records the characteristics (at least the bending rigidity) of the outer cable for each type of outer cable. The inner cable characteristic data file records the inner cable characteristics (at least shaft rigidity) for each type of inner cable. The outer terminal characteristic data file records the axial rigidity and axial rigidity of each type of outer terminal. The clamp characteristic data file records the axial rigidity and axial rigidity of each type of clamp member.
(Mode 2) In the calculation model of the control cable, the outer cable portion and the inner cable portion are set to be displaceable in a three-dimensional direction.

  Embodiments embodying the present invention will be described with reference to the drawings. In the present embodiment, a method of calculating a control cable routing route using a routing routing analyzer using a computer will be described. A method for calculating the stroke loss of the control cable using the calculated routing route will be described. The stroke of the control cable indicates a difference between the operation amount applied to the input end of the inner cable and the movement amount of the output end of the inner cable relative to the operation amount. That is, (stroke loss) = (operation amount applied to the input end when the load is input) − (movement amount of the output end when the load is input). The smaller the stroke loss, the more efficiently the operation applied to the input end is transmitted to the output end.

  First, with reference to FIGS. 17-20, the control cable 60 to be analyzed and the automobile parking brake system 50 using the control cable 60 will be briefly described. FIG. 17 schematically shows the configuration of the parking brake system 50. As shown in FIG. 17, the parking brake system 50 includes an operation device 51 that is an input side device, a brake device 54 that is an output side device, and a control cable 60 that connects the two. The operation device 51 is disposed in the vicinity of the driver's seat of the vehicle (not shown), and the brake device 54 is disposed in the vicinity of the rear wheel of the vehicle (not shown). The operation device 51 includes an operation member 52 for the driver to operate. The brake device 54 includes a braking member (transmitted member) 55 for braking the rear wheel.

The control cable 60 includes an outer cable 61 and an inner cable 62 inserted into the outer cable 61. FIG. 18 shows the structure of the control cable 60. As shown in FIG. 18, the outer cable 61 has a flat steel wire portion 61a formed by spirally winding a flat steel wire and a covering portion 61b covering the flat steel wire portion 61a. The flat steel wire portion 61a has a structure similar to a square spring. The covering portion 61b is made of a polymer material (resin material in this embodiment). The inner cable 62 is formed by twisting a plurality of wires (steel wires). The structure of the control cable 60 shown in FIG. 18 is an example, and does not mean that the control cable 60 to be analyzed in this embodiment is limited to this structure.
As shown in FIG. 17, an outer terminal 64 is provided at each end of the outer cable 61. One end of the outer cable 61 is attached to the frame 53 of the operating device 51 via the outer terminal 64, and the other end of the outer cable 61 is attached to the frame 56 of the brake device 54 via the outer terminal 64. . FIG. 19 illustrates the outer terminal 64. The outer terminal 64 includes a cushion material (not shown) inside, and supports the control cable 60 so that it can be elastically displaced in the axial direction and the axial direction. The outer terminal 64 is not necessarily provided with a cushion material. The axial rigidity and the axial rigidity of the outer terminal 64 vary depending on the type of the outer terminal 64.
As shown in FIG. 17, the control cable 60 is attached to the vehicle at a middle position by a plurality of clamp members 66. FIG. 20 illustrates the clamp member 66. The clamp member 66 is formed of an elastic material (metal or resin), and supports the control cable 60 so as to be elastically displaceable in the axial direction or the axial direction. The axial rigidity and the axial rigidity of the clamp member 66 vary depending on the type of the clamp member 66.

  The routing route of the control cable 60 shown in FIG. 17 is an example. The routing route of the control cable 60 includes not only the length of the control cable 60, the positions (including directions) of the outer terminals 64 at both ends thereof, but also the positions (including directions) of the plurality of clamp members 66. Characteristics (at least bending rigidity), characteristics of the inner cable 62 (at least axial rigidity), characteristics of the outer terminal 64 (at least axial rigidity, axial rigidity), characteristics of the clamp member 66 (at least axial rigidity, axial rigidity), inner cable It changes according to the input load (operation force) to 62.

  Next, the routing route analysis device 10 will be described. FIG. 1 is a block diagram schematically showing the configuration of the routing path analysis apparatus 10. The routing path analysis device 10 functionally includes an input device 12, a display device 14, an output device 16, a data processing unit 20, and a data storage unit 30. The input device 12 includes a pointing device such as a keyboard and a mouse. The display device 14 includes a display that displays the calculated result. The output device 16 includes a printer that prints out the calculated result. The data processing unit 20 and the data storage unit 30 are configured by computer hardware and software.

  The data processing unit 20 mainly includes a calculation model creation unit 22, a routing route calculation unit 24, and a stroke loss calculation unit 26. The calculation model creation unit 22 performs processing for creating a calculation model of the control cable 60 by approximating the outer cable 61 and the inner cable 62 individually with a set of finite elements based on the given data. The routing route calculation unit 24 executes a process of calculating the routing route of the control cable 60 using the calculation model created by the calculation model creation unit 22. The stroke loss calculation unit 26 performs a process of calculating a stroke loss using the routing route of the control cable 60 calculated by the routing route calculation unit 24.

The data storage unit 30 stores an outer cable characteristic data file 32, an inner cable characteristic data file 34, an outer terminal characteristic data file 36, and a clamp characteristic data file 38.
The outer cable characteristic data file 32 records the characteristic (bending rigidity) of the outer cable 61 for each type of outer cable 61 [diameter, outer cable type (for example, flat steel type or strand type), etc.]. The bending rigidity of the outer cable 61 can be obtained by applying a load (bending moment) to the outer cable 61 and measuring the amount of deformation (curvature) at that time. The outer cable characteristic data file 32 may be recorded with the measured bending stiffness (dashed line graph B in FIG. 2) as it is. However, the model characteristic (solid line graph A in FIG. 2) is obtained by simplifying the measured bending rigidity. ) May be recorded. In this embodiment, model characteristics are used. In the outer cable characteristic data file 32, model characteristics A relating to bending rigidity as shown in FIG. 2 are recorded for each type of outer cable 61.

  The inner cable characteristic data file 34 records the characteristics (axial rigidity) of the inner cable 62 for each type of the inner cable 62 [diameter, how to twist the steel wire (for example, single twist or double twist), etc.]. The axial rigidity of the inner cable 62 can be obtained by applying a tensile load to the inner cable 62 and measuring the amount of elongation at that time. The measured axial rigidity (broken line graph B in FIG. 3) may be recorded as it is in the inner cable characteristic data file 34, but the model characteristic (solid line graph A in FIG. 3) that simplifies the measured axial rigidity may be used. ) May be recorded. In this embodiment, model characteristics are used. In the inner cable characteristic data file 34, model characteristics A relating to shaft rigidity as shown in FIG. 3 are recorded for each type of the inner cable 62.

  The outer terminal characteristic data file 36 records the axial rigidity and axial rigidity of each type of outer terminal 64. The axial rigidity (or axial rigidity) of the outer terminal 64 is obtained by applying an axial load (or axial load) to the control cable 60 fixed to the outer terminal 64, and the amount of axial displacement (or shaft) at that time. (Amount of displacement in the straight direction) can be obtained by actually measuring. In the outer terminal characteristic data file 36, the measured axial rigidity and axial rigidity may be recorded as they are, but model characteristics obtained by simplifying each measured rigidity may be recorded. FIG. 4 illustrates measured axial stiffness (broken line graph B) and model characteristics (solid line graph A) obtained by simplifying it. In this embodiment, model characteristics are used, and in the outer terminal characteristic data file 36, model characteristics related to axial rigidity and model characteristics related to axial rigidity are recorded for each type of outer terminal 64.

  The clamp characteristic data file 38 records the axial rigidity and axial rigidity of each type of the clamp member 66. The axial rigidity (or axial rigidity) of the clamp member 66 is obtained by applying an axial load (or axial load) to the control cable 60 fixed to the clamp member 66, and the axial displacement (or (Amount of displacement in the straight direction) can be obtained by actually measuring. The clamp characteristic data file 38 may record the measured axial rigidity and axial rigidity as it is, or may record model characteristics obtained by simplifying the measured rigidity. FIG. 5 illustrates the measured axial straight direction rigidity (dashed line graph B) and model characteristics (solid line graph A) obtained by simplifying the rigidity. In this embodiment, model characteristics are used, and in the clamp characteristics data file 38, model characteristics regarding axial rigidity and model characteristics regarding axial rigidity are recorded for each type of clamp member 66.

Next, the procedure for calculating the routing route of the control cable 60 using the routing route analysis device 10 will be described based on the flowchart shown in FIG.
In step S <b> 2, the type of the outer cable 61 is input using the input device 12. The type of the input outer cable 61 is stored in the internal memory of the data processing unit 20. The calculation model creation unit 22 of the data processing unit 20 reads out the characteristic (bending rigidity) of the outer cable 61 corresponding to the input type from the outer cable characteristic data file 32. The read characteristics of the outer cable 61 are stored in the internal memory of the data processing unit 20.
In step S <b> 4, the type of the inner cable 62 is input using the input device 12. The type of the input inner cable 62 is stored in the internal memory of the data processing unit 20. The calculation model creation unit 22 of the data processing unit 20 reads the characteristic (axial rigidity) of the inner cable 62 corresponding to the input type from the inner cable characteristic data file 34. The read characteristics of the inner cable 62 are stored in the internal memory of the data processing unit 20.

In step S <b> 6, the type of the outer terminal 64 is input using the input device 12. The type of the input outer terminal 64 is stored in the internal memory of the data processing unit 20. The routing route calculation unit 24 of the data processing unit 20 reads out the characteristics (axial rigidity, axial rigidity) of the outer terminal 64 corresponding to the input type from the outer terminal characteristic data file 36. The read characteristics of the outer terminal 64 are stored in the internal memory of the data processing unit 20.
In step S <b> 8, the mounting conditions (mounting position and mounting angle) of the control cable 60 are input using the input device 12. Specifically, the positions and angles of the two outer terminals 64 and the positions and angles of the plurality of clamp members 66 are input. The positions and angles of the outer terminal 64 and the clamp member 66 are given by design data (CAD data) of the automobile.

In step S <b> 10, the type of the clamp member 66 is input using the input device 12. The type of the input clamp member 66 is stored in the internal memory of the data processing unit 20. The routing path calculation unit 24 of the data processing unit 20 reads the characteristics (axial rigidity, axial rigidity) of the clamp member 66 corresponding to the input type from the clamp characteristic data file 38. The read characteristics of the clamp member 66 are stored in the internal memory of the data processing unit 20.
In step S <b> 12, the cable length (the length of the outer cable 61) is input using the input device 12. The input cable length is stored in the internal memory of the data processing unit 20.
In step S <b> 14, a load applied to the inner cable 62 is input using the input device 12. As described above, the routing route of the control cable 60 changes according to the load applied to the inner cable 62. For example, in the parking brake system 50, when the driver operates the operation member 52 of the operation device 51, the routing route of the control cable 60 changes according to the load (tensile force) applied to the inner cable 62. The routing route analysis apparatus 10 of the present embodiment can calculate the routing route of the control cable 60 in consideration of the load applied to the inner cable 62.

  In step S16, the calculation model creation unit 22 creates a calculation model 160 (see FIG. 7) in which the control cable 60 is approximated by a set of finite elements based on the cable length input in step S12. As shown in FIG. 7, in the calculation model 160 created by the calculation model creation unit 22, each of the outer cable portion 161 and the inner cable portion 162 is composed of a set of finite elements. The outer cable portion 161 and the inner cable portion 162 are set so as to be capable of relative displacement along the axial direction, and are set so as not to be relatively displaced along the direction perpendicular to the axis. The characteristic (bending rigidity) of the outer cable portion 161 is set using the characteristic (bending rigidity) read from the outer cable characteristic data file 32 in step S2. The characteristic (axial rigidity) of the inner cable portion 162 is set using the characteristic (axial rigidity) read from the inner cable characteristic data file 34 in step S4. In addition, although detailed illustration is abbreviate | omitted in FIG. 7, the outer cable part 161 of the calculation model 160 has a structure expressing the structure of the outer cable 61 which wound the flat steel spirally.

  Subsequently, in step S18 of FIG. 6, the routing route calculation unit 24 of the data processing unit 20 executes the finite element method using the calculation model 160 created in step S16, and determines the routing route of the control cable 60. calculate. At this time, the routing route calculation unit 24 reads the characteristics (axial rigidity, axial rigidity) of the outer terminal 64 read in step S6, the mounting position and mounting angle input in step S8, and the reading in step S10. The routing path is analytically calculated by using the characteristics of the clamp member 66 (axial rigidity, axial rigidity) and the load applied to the inner cable 62 input in step S14 as boundary conditions.

  Here, with reference to FIG. 8 to FIG. 10, the routing route calculation procedure by the routing route calculation unit 24 will be described. As shown in FIG. 8, first, one end portion of the calculation model 160 (specifically, one end portion of the outer cable portion 161) is arranged at the attachment position A. At this stage, the calculation model 160 is linearly extended. Next, as shown in FIG. 9, the other end 160e of the calculation model 160 is moved toward the mounting position E, and the routing route of the calculation model 160 at that time is analyzed and calculated. Here, the distance by which the end 160e is moved in one calculation is a distance that does not diverge the route calculation. Next, as shown in FIG. 10, the intermediate mounting portions (positions at which the clamp member 66 is attached) 160b, 160c, 160d of the calculation model 160 are moved to the respective attachment positions B, C, D, and the calculation model 160 at that time is moved. Analyzes and calculates the routing route. Also in this case, the distance for moving the intermediate mounting portions 160b, 160c, and 160d in one calculation is set such that the calculation of the routing route does not diverge. Next, the force applied to the outer terminal 64 or the clamp member 66 from the calculation model 160 is calculated at each of the attachment positions A, B, C, D, and E. Then, an analysis operation for correcting the positions of the respective parts 160a to 160e of the calculation model 160 is executed in consideration of the characteristics (axial rigidity and axial rigidity) of the outer terminal 64 and the clamp member 66.

  Through the above procedure, the routing route of the calculation model 160, that is, the routing route of the control cable 60 is calculated. Here, for example, by returning to step S14 and changing the load applied to the inner cable 62, the routing route of the control cable 60 at that time can be newly calculated. By calculating a routing route in which the load applied to the inner cable 62 is sequentially changed, the dynamic routing route of the control cable 60 during the operation of the parking brake system 50 can be obtained. Thereby, the presence or absence of interference with the vehicle of the control cable 60 can be grasped more accurately.

When the routing route of the control cable 60 is calculated, in the subsequent step S20, the stroke loss of the control cable 60 is calculated by the stroke loss calculating unit 26 of the data processing unit 20.
Normally, the stroke loss is actually measured by placing the control cable 60 and applying an input load (operation force) to the other end of the inner cable 62 with the output end of the inner cable 62 being fixed. This is done by measuring the amount of movement. Therefore, as shown in FIG. 11, the input load (operating force) is applied to the input end 162a of the inner cable portion 162 under the condition that the output end 162b of the inner cable portion 162 is fixed using the calculation model 160 of the routed control cable 60. The stroke loss can be calculated by loading P and analyzing and calculating the moving amount L of the input end 162a at that time. However, this method has a high calculation cost, and the stroke loss cannot be calculated easily.
Therefore, the stroke loss calculation unit 26 of the present embodiment divides the routing route of the calculation model 160 for each attachment position A-E, and each partial distribution routing route AB, BC, CD, A partial stroke loss is calculated for each D-E. Then, the total value of the partial stroke loss calculated for each partial distribution route is taken as the stroke loss of the entire control cable 60.
Finally, in step S22 of FIG. 6, various analysis results, that is, the routing route of the control cable 60, the stroke loss, the reaction force applied to the outer terminal 64 and the clamp member 66, and the like are displayed on the display device 14. . These analysis results can also be output to the outside by the output device 16.

As shown in FIG. 12, the partial stroke loss dL in the partial distribution route (for example, between B and C) is calculated on the assumption that the partial distribution route is a simple bend. The simple bending here means that the partial distribution cable path is curved in a single plane and the curvature thereof is constant. As a result, the partial distribution route (for example, between B and C) is determined by the distance D and the bending angle θ.
FIG. 13 shows an actual measurement value (broken line B) of the partial stroke loss in the partial distribution route and an analysis value (solid line A) of the partial stroke loss dL assuming that the partial distribution route is a simple bend. As shown in FIG. 13, even if the partial distribution path is assumed to be a simple bend, the partial stroke loss dL can be accurately calculated.
FIG. 14 shows the relationship between the bending angle θ and the partial stroke loss dL. As shown in FIG. 14, regarding the relationship between the bending angle θ and the partial stroke loss dL, the analytical value (marked with x in the figure) assuming that the partial distribution path is a simple bending is a value that is very close to the actual measurement value. It was confirmed.
FIG. 15 shows an analysis value of stroke loss L (total value of partial stroke loss dL) by the stroke loss calculation unit 26 and an actual measurement value of stroke loss in the control cable 60 actually routed. As shown in FIG. 15, it has been confirmed that the stroke loss of the control cable 60 can be accurately calculated by the stroke loss calculation unit 26.

  FIG. 16 is a graph showing the relationship between the position of the clamp member 66 and the stroke loss obtained by the routing path analyzing apparatus 10. A in the figure shows a case where the portion between the distribution cable paths B and C (see FIG. 11) is not fixed by the clamp member 66. B in the drawing shows a case where the intermediate position of the partial distribution route B-C is moved by a new clamp member 66 to the outside in the bending direction by a predetermined distance. C in the drawing shows a case where the intermediate position of the partial distribution route B-C is moved by a new distance by a new clamp member 66 in the bending direction. D in the figure shows a case where the intermediate position of the partial distribution route B-C is moved by a predetermined distance in the direction perpendicular to the arrangement plane by the new clamp member 66. As shown in FIG. 16, the stroke loss of the control cable 60 varies depending on the position of the clamp member 66. In particular, according to the analysis result of this time, it has been found that the stroke loss can be reduced by moving the intermediate position of the partial distribution path B-C by a new distance by the new clamp member 66 toward the center of the curve. .

Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.
In addition, the technical elements described in the present specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

The block diagram which shows the structure of a routing route analysis apparatus. The graph which shows the bending rigidity of an outer cable. The graph which shows the axial rigidity of an inner cable. The graph which shows the axial direction rigidity of an outer terminal. The graph which shows the axial direction rigidity of a clamp member. The flowchart which shows the procedure which calculates the routing route of a control cable. The schematic diagram which shows the calculation model of a control cable. The figure which shows the 1st process of calculating a routing route using a calculation model. The figure which shows the 2nd process of calculating a routing route using a calculation model. The figure which shows the 3rd process of calculating a routing route using a calculation model. The figure which shows the calculation method of the stroke loss using a calculation model. The figure which shows the partial stroke loss in a partial distribution route. The graph which shows the relationship between input load and partial stroke loss. The graph which shows the relationship between a bending angle and partial stroke loss. The graph which shows the relationship between input load and stroke loss. Graph showing the relationship between clamp position and input load-stroke loss. The figure which shows the structure of a parking brake system. The figure which illustrates the structure of a control cable. The figure which illustrates the structure of an outer terminal. The figure which illustrates the structure of a clamp member.

Explanation of symbols

10: Routing route analysis device 12: Input device 14: Display device 16: Output device 20: Data processing unit 22: Calculation model creation unit 24: Routing route calculation unit 26: Stroke loss calculation unit 30: Data storage unit 32: Outer cable characteristic data file 34: Inner cable characteristic data file 36: Outer terminal characteristic data file 38: Clamp characteristic data file 50: Parking brake system 51: Operating device 52: Operating member 53: Operating device frame 54: Brake device 55: Braking member (transmitted member)
56: Braking device frame 60: Control cable 61: Outer cable 62: Inner cable 64: Outer terminal 66: Clamp member 160: Calculation model 161: Outer cable portion 162: Inner cable portion

Claims (6)

It is a device for analyzing the routing route of the control cable with the inner cable inserted into the outer cable.
Means for inputting outer cable characteristic data including at least the bending rigidity of the outer cable;
Means for inputting inner cable characteristic data including at least the axial rigidity of the inner cable;
Means for entering the length of the control cable;
Means for inputting mounting conditions including at least a control cable mounting position and mounting angle;
Means for inputting the input load to the inner cable;
Using the input outer cable characteristic data, inner cable characteristic data, and control cable length, a calculation model creating means for creating a calculation model of the control cable by approximating the outer cable and inner cable individually by a set of finite elements,
A routing route calculation means for performing a numerical analysis using the calculated control cable calculation model, the input control cable mounting conditions and the input load to the inner cable, and calculating the routing route of the control cable;
A routing path analysis device comprising:   Stroke loss calculation means for performing a numerical analysis using the calculated control cable routing path and calculating a difference between the movement amount at the input end and the movement amount at the output end of the inner cable loaded with the input load is added. The routing path analyzing apparatus according to claim 1, wherein   3. The routing path analyzing apparatus according to claim 1, wherein the stroke loss calculating unit calculates the difference in the movement amount under a condition in which the output end of the inner cable is fixed or movable. 4.   The stroke loss calculating means divides the calculated control cable routing route by the control cable mounting position, and calculates the difference in the movement amount under the condition that each of the divided partial distribution routings is assumed to be a simple bend. The routing path analyzing apparatus according to claim 1 or 2, wherein   3. The routing path analyzing apparatus according to claim 1, wherein the attachment condition includes axial rigidity and / or axial rigidity when a control cable is supported at the attachment position. 4. It is a method for analyzing the routing route of the control cable with the inner cable inserted in the outer cable by a computer ,
A computer acquiring outer cable characteristic data including at least the bending rigidity of the outer cable;
A step in which a computer acquires inner cable characteristic data including at least the axial rigidity of the inner cable;
The computer obtains the length of the control cable;
A computer acquiring a mounting condition including at least a control cable mounting position;
A process in which the computer obtains an input load to the inner cable;
Using the acquired outer cable characteristic data, inner cable characteristic data, and control cable length, the computer creates a control cable calculation model that approximates the outer cable and inner cable individually by a set of finite elements;
The computer performs a numerical analysis using the calculated calculation model of the control cable, the acquired installation condition of the control cable and the input load to the inner cable, and calculates the routing route of the control cable;
A method for analyzing a routing route comprising:

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