JP3986705B2 - CONDITION SETTING DEVICE, CONDITION SETTING METHOD, AND MEDIUM CONTAINING CONDITION SETTING PROGRAM - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condition setting method and a medium on which a condition setting program is recorded. Specifically, the behavior of a sheet such as a sheet conveyed in a copying machine, a printer, a document feeder, a printing machine, etc. is analyzed by computer simulation. Therefore, the present invention relates to a condition setting method for setting necessary input information.
[0002]
[Prior art]
As computer performance has improved in recent years, computer simulation has been widely performed as a method for machine design, and its importance is increasing year by year.
[0003]
Examining the functions of a design under various conditions before actually creating a product can reduce development costs and time periods by reducing the number of prototypes in the product development phase, which can be used in corporate activities. Not only is it beneficial, but it also enables consideration of the global environment, such as saving resources.
[0004]
Even in a copying machine, a printer, a document feeder, and a printing machine, it is important to analyze a sheet conveyance behavior by a computer simulation program and optimize a conveyance path in advance. In particular, paper, etc., among sheets, changes its properties depending on temperature, humidity, etc., or when it is deformed plastic rather than flat from the beginning, or when it is deformed greatly by double-sided printing, etc. There are cases where mechanical properties (rigidity, surface properties) change during operation due to image formation. For such many conditions, many tests are required to confirm the reliability of the product, leading to a longer development period and an increased cost. However, since many conditions can be implemented by computer simulation, the period and development cost can be reduced.
[0005]
FIG. 11 shows an example of a flowchart of a computer simulation program for analyzing such sheet conveyance.
[0006]
After starting the program execution, various types such as conveyance guide data consisting of the shape and coordinate values of the conveyance guide that contribute to the conveyance of the sheet material configured by the device, rigidity and density determined by the Young's modulus of the sheet material, sheet thickness, width, etc. Characteristic data, parameters necessary for calculation, and the like are input from a file or the like (step S1101). These programs may have a program structure that is directly specified from a program using a keyboard or a pointing device. Next, after inputting the calculation conditions, the conveyance guide and the sheet are modeled by substituting a value for a predetermined variable or the like (step S1102). Describes the motion of the sheet and elastic body guide (the guide that constitutes the transport path may be treated as a stationary rigid body or an elastic body, and may be a rigid body that rotates or moves as necessary). It is necessary to solve the equation of motion, and this equation must approximate the algebraic expression with space and time as finite quantities. For space, typical methods include the difference method and the finite element method, and for the time, direct time integration methods such as Runge-Kutta method, linear acceleration method (including Newmark's beta method), Wilson's theta method and Hoobolt method are used. There are many. The computer simulation program shown in FIG. 11 does not depend on these methods. As a result, the representative point of the sheet or the elastic guide at an arbitrary time (the representative point does not need to be at a fixed position with respect to the initial shape, and the arbitrary time The force (drag that may be reset in each) (this displacement may be a new coordinate value after deformation in an arbitrary space) and the force and drag that act when the sheet and the conveyance path (other structure) contact each other. It is only necessary to have a function that requires a contact force between the frictional force and the frictional force. As described above, this program sequentially and sequentially calculates the sheet state after an arbitrary time from the initial state. For example, calculation of n + 1 steps corresponding to time is performed based on the result after n steps (step S1103). The contact between the sheet and the conveyance guide is determined at an arbitrary time (step S1104), and the entire simultaneous equation is created based on this (step S1105). In the computer, matrix calculation is performed, and iterative calculation is performed until the result converges (step S1106). This includes both the fact that the deformation of the sheet includes geometrical and material nonlinear problems and the nonlinearity of the boundary conditions due to the number and coordinates of contact points and the magnitude of the contact force being undecided. It is because it is.
The calculation converges, and a solution at an arbitrary time (displacement at an arbitrary position of the sheet or the conveyance guide or a new coordinate value and a contact force acting on both) is obtained and written in a file (step S1107). ). If the end time has been reached, the process ends. If not, the next time step Δt is set and calculation is performed at the next time (steps S1108 and S1109). If it is determined that the iteration does not converge, it is necessary to reset the time step used in this step to a smaller value and repeat until convergence (steps S1106 and S1109).
[0007]
Here, in order to efficiently perform such computer simulation and reflect it in the design, pre-processing that realizes the function to create data to be input to the calculation, and display the calculation results in an easy-to-understand manner for the user, Post-processing that realizes a function of selectively extracting information for determining whether or not the finished product is good from a calculation result, or processing it as necessary is indispensable. Recent OSs have a GUI development environment with multi-window systems such as X Window and Microsoft's Windows, etc., and implement a pre-post processing method that is simple and easy for users to understand and without mistakes. Development of a device to make it easier.
[0008]
In addition, a highly practical post-processing method and post-processing device that can visualize the calculation result by the computer simulation program for analyzing the sheet conveyance behavior, display it on the computer display, and process it on the multi-window system. Has been developed. Furthermore, in order to support not only the display of the results but also the design, the characteristic values for evaluating the sheet transportability are selectively taken out and stored in a file or displayed on a computer screen to inform the user and necessary. If so, a design support system indicating a design change point has been developed. In addition, as a pre-processing method and apparatus, a method in which a sheet conveyance direction is set by a method of specifying a rotation direction of a conveyance member has been proposed.
[0009]
According to these methods, in the simulation for calculating the deformation of the sheet conveyed in the conveyance path, the handling of the sheet conveyance condition by the conveyance member can be selected variously. For example, when a sheet is sandwiched and conveyed by two rollers, a detailed simulation method (hereinafter referred to as a first conventional example) that takes into consideration the contact state between the roller and paper and the deformation of the roller to the movement of the roller support position. ) And a simulation method (hereinafter referred to as a second conventional example) in which forced displacement is applied as a boundary condition at a position where a roller is merely a guide and a sheet is conveyed. The former method can be calculated in detail up to a state where a sheet is conveyed while being interfered by a plurality of conveying units. The latter method is a simple condition that is effective only in a limited area from one conveyance unit to the next conveyance unit, but is an economical method mainly focusing on optimization of the conveyance guide.
[0010]
[Problems to be solved by the invention]
However, in the simulation method of the first conventional example, although the calculation can be performed in detail, the calculation time is increased. Further, in the simulation method of the second conventional example, it is necessary to set a conveyance angle and a region for giving a forced displacement.
[0011]
The present invention is for solving these problems, and even if the shape of the conveying member is the same, if the hardness of the member is different (one side is hard, one is rubber, etc.), the angle at which the sheet is conveyed becomes different. Therefore, in consideration of these factors, a medium on which a condition setting method and a condition setting program that can easily set a region that gives a boundary condition in calculation and can easily correct an input condition simply by selecting a conveying member The purpose is to provide.
[0012]
[Means for Solving the Problems]
In order to solve the above problems, the present invention uses a sheet-like structure as an analysis model, and the sheet-like structure is conveyed and deformed by frictional contact between a conveying member that conveys the sheet-like structure and the sheet-like structure. In a condition setting device for setting an input condition for computer simulation of a state, a selection means for selecting two conveyance members, an intersection coordinate calculation means for calculating an intersection coordinate of the selected conveyance members, and an obtained intersection point are connected. It is characterized in that it is provided with an inclination calculating means for calculating an inclination of a straight line or an inclination of a tangent when the intersection is a contact point. Therefore, it is possible to easily set input conditions for computer simulation simply by selecting a conveying member.
[0013]
In another aspect of the invention, the condition setting device includes: a selection unit that selects two conveyance members; an intersection coordinate calculation unit that calculates an intersection coordinate of the selected conveyance member; and a slope of a straight line connecting the obtained intersection points, or When the intersection is a contact point, the first inclination calculation means for calculating the inclination of the tangent, the arbitrary ratio input means for inputting an arbitrary ratio, and the inclination of the tangent that touches the conveyance member at the intersection of one of the conveyance members is calculated. The slope obtained by the first slope means obtained by multiplying the difference between the slope obtained by the second slope means and the slope obtained by the second slope means and the slope obtained by the first slope means by the input arbitrary ratio. And a means for adding to. Therefore, the input condition can be easily corrected.
[0014]
Still further, the condition setting device according to another aspect of the invention includes a selection unit that selects two conveyance members, an intersection point coordinate calculation unit that calculates an intersection point coordinate of the selected conveyance member, and a slope of a straight line connecting the obtained intersection points, or the intersection point 1 is a first inclination calculation means for calculating the inclination of the tangent line, an arbitrary amount input means for inputting an arbitrary amount, and an inclination obtained by the first inclination calculation means from the intersection obtained by the intersection coordinate calculation means And a means for calculating the coordinates of a point moved by an arbitrary amount inputted in the direction. Therefore, it is possible to easily correct the input conditions for executing good calculation.
[0015]
Also, the selected two conveying member shapes and the intersection of the two conveying members or the point at which the intersecting point is moved by an arbitrary amount in the direction of the tangent slope, the straight line connecting the intersections or the intersection is the contact point In this case, the arrow indicates the direction of the tangent slope, or the value obtained by adding the angle obtained by multiplying the angle between the tangent line of each conveying member at the intersection point and the straight line connecting the intersection points to an arbitrary ratio to the tangential slope. By displaying the arrow shape matched with the direction of the arrow in a graphic form on the display device, the set transport conditions can be visually confirmed, and erroneous settings can be reduced.
[0016]
Furthermore, by having a database in which the conveyance direction is referenced from the value input by the conveyance member condition setting input means for inputting the shape, hardness, and pressure of the selected conveyance member and the input value of the sheet-like structure to be simulated, The burden of the user paying attention to the setting conditions can be reduced, and more realistic simulation can be realized.
[0017]
As another invention, a state in which a sheet-like structure is conveyed and deformed by a frictional contact between a sheet-like structure and a conveying member that conveys the sheet-like structure by a computer is used as an analysis model. A condition setting program for executing a condition setting for setting conditions such as a boundary condition of a conveyance force or a conveyance amount applied to a sheet-like structure by a conveyance unit composed of two conveyance members pressed against each other among input conditions for computer simulation Has a function to set conditions such as boundary conditions using the intersection coordinate value of the selected two conveying members and the straight line connecting the intersection points, or the slope of the tangent line when the intersection point is a contact point There is a feature in the medium on which the condition setting program is recorded. Therefore, the condition setting device can be used for a general purpose without changing the existing system by the medium in which the condition setting program having such a function is recorded.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
The selection means for selecting two conveying members, the intersection coordinate calculating means for calculating the intersection coordinates of the selected conveying member, and the inclination of the straight line connecting the obtained intersection points, or the inclination of the tangent line if the intersection is a contact point Inclination calculating means for calculating.
[0019]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing the configuration of a system for executing the condition setting method of the present invention. In FIG. 1, an input unit 1 is an input unit for inputting information, and is a keyboard, a tablet, a mouse, or the like for inputting data or command keys. The CPU 2 performs calculations for various processes, logical determinations, and the like, and controls each component connected to the bus 7. The display unit 3 is a display or the like. The program memory 4 may be a ROM that stores a computer simulation program or a program that performs pre-post processing, or may be a RAM in which the program is loaded. The data memory 5 stores data generated by various processes. The external storage unit 6 stores input / output files. Various programs may be stored in the external storage unit 6 as described above, and read from here. The bus 7 is a bus for transferring an address signal indicating a component to be controlled by the CPU 2, a control signal for controlling each component, and data exchanged between the components.
[0020]
Next, the operation of the condition setting method according to the first embodiment of the present invention by the system having the configuration as shown in FIG. 1 will be described below with an example in which two rollers are selected as the conveying means shown in FIG. explain.
[0021]
As shown in FIG. 2, the transport roller 21 and the transport roller 22 have two intersections 23. A straight line connecting the intersections 23 is defined as a sheet conveying direction (hereinafter referred to as a conveying direction) 24. If the conveying roller 21 rotates counterclockwise, the condition is that the sheet is conveyed in the conveying direction 24. This transport direction 24 can be defined by an angle (hereinafter referred to as a transport support angle) 26 from the x-axis (horizontal axis 25 in FIG. 2) of the global coordinate system, for example. If the shape is defined so that the transport roller 21 and the transport roller 22 are in contact with each other, the tangent line coincides with the transport direction 24 (not shown). When the selected transport member is the transport source, the transport direction side of the two intersections 23 is defined as the transport start point 27. This is a representative point for identifying the area of the sheet to be conveyed in the simulation. A line passing through this point and perpendicular to the conveyance direction is defined as a conveyance boundary line 28. A side opposite to the transport direction 24 from the transport boundary line 28 is defined as a transport region 29 (indicated by a hatched line in FIG. 2). If the selected conveying member is the conveying destination and the leading edge of the sheet is inherited, the one that is located on the opposite side of the conveying direction 24 from the two intersections 23 becomes the conveying start point. The conveyance direction side is defined as a conveyance area from a conveyance boundary line passing through this point and perpendicular to the conveyance direction (not shown). For example, when a simulation is performed using a finite element method or the like, a transfer force or a movement amount by transfer is given as a forced displacement to a node located in the transfer region (displacement boundary condition). Consider the case where displacement is given as a boundary condition. For example, when the time step dt, the input transport speed is V, and the transport support angle is α, a forced displacement of dt × V × cos α in the x direction and dt × V × sin α in the y direction may be given. Therefore, even when the conveyance member is one conveyance roller (drive) and one plane, the conveyance direction and the conveyance start point can be similarly defined from the intersections and contact points (not shown).
[0022]
Next, when the hardness of the two conveying members is different, it is expected that the deviation from the conveying direction is increased in the above description, which may greatly affect the calculation result. Therefore, a method for correcting the conveyance support angle indicating the conveyance direction will be described below. That is, in FIG. 2, it is assumed that the transport roller 21 is harder, and in FIG. 3, it is assumed that the transport roller 21 is completely rigid. Therefore, in FIG. 3, it is assumed that the conveyance roller 22 is simply missing by the amount corresponding to the conveyance roller 21, and the tangent line of the conveyance roller 21 at the intersection as the conveyance start point is shown. Since it is assumed that the transport roller 21 is counterclockwise, the direction of the tangent 31 is defined as a direction perpendicular to the radius 32 as shown in FIG. The angle at which the sheet is actually conveyed is considered to be between the conveyance direction 24 and the tangential direction 31 in FIG. Accordingly, an angle between the tangential direction 31 and the conveyance direction 24 in FIG. 2 is θ, and a conveyance support angle indicating the conveyance direction 24 in FIG. 2 is α. Here, if 0.5 is input as an arbitrary ratio, the direction defined by α + 0.5 × θ is the transport direction defined here. Since the arbitrary ratio shown here may change depending on the hardness, paper type, and the like, the input condition is set so that the user can change it.
[0023]
Note that if the conveyance starting point is defined by an intersection as shown in FIG. 2, the convergence state of the simulation may be deteriorated. In this case, it is desirable to slightly shift the conveyance starting point so that the calculation is performed satisfactorily. An arbitrary amount 41 is input as the value to be shifted. When the conveying member is the conveying source, the setting is made as shown in FIG. A point moved by an arbitrary amount 41 along the transport direction 24 from the right intersection 23 as the transport start point in FIG. A perpendicular to the conveyance direction passing through this point is defined as a conveyance boundary line 28, and the reverse conveyance direction is defined as a conveyance region 29 based on this. Alternatively, when the transport member is the transport destination, a point moved by an arbitrary amount 41 along the opposite side of the transport direction 24 from the left intersection 23 in FIG. 4 is defined as a transport start point 42, and a perpendicular to the transport direction passing through this point. Is defined as a transport boundary line 28, and the transport direction 24 is defined as a transport area 29 (not shown).
[0024]
Next, FIG. 5 is a flowchart showing processing of the condition setting method according to the first embodiment of the present invention. In the figure, first, a conveyance member is selected using the input unit 1 of FIG. 1, such as a mouse or a keyboard (step S501). Further, the rotation direction of the transport roller is also selected from the input unit (step S502). If the shape is defined, the intersection coordinates are calculated by the CPU 2 in FIG. 1 (step S503). Then, the slope of the straight line connecting the intersections is calculated by the CPU 2 in FIG. 1 (step S504). The coordinates of the conveyance start point and the conveyance support angle are determined based on whether the conveyance unit is the conveyance source or the conveyance destination, the rotation direction of the conveyance roller, and the like (step S505). The coordinates of the conveyance start point and the conveyance support angle are temporarily stored in the external storage unit 6 in FIG. 1 and read out from the activated simulation process or transferred via the data memory 5 in FIG.
[0025]
FIG. 6 is a flowchart showing the process of the condition setting method according to the second embodiment of the present invention. In the figure, first, the condition of the conveying member is set from the input unit 1 in FIG. 1 (in addition to the selection of the member in FIG. 5 and the rotation direction of the conveying roller, the magnitude relationship of the hardness of the member) (step S601). ), An arbitrary ratio for correcting the conveyance paper angle is input (step S602). Note that this step S602 may be performed before the setting of the conveying member in step S601). Then, the intersection coordinates are calculated (step S603), and the intersection that is the conveyance starting point is selected from the intersections, which is the conveyance source or the conveyance destination, and the rotation direction of the conveyance rollers. The inclination of the tangent line of the harder conveying member passing through the intersection serving as the conveyance starting point is calculated (step S604). Further, as in FIG. 5, the slope of the straight line connecting the intersections is calculated (step S605). Thus, the value obtained by the above-described equation (α + 0.5 × θ) is set as the conveyance support angle (step S606).
[0026]
Next, FIG. 7 is a flowchart showing the process of the condition setting method according to the third embodiment of the present invention. In this embodiment, it is assumed that the conveying member has already been set as shown in FIG. 5 or FIG. If it is necessary to correct the conveyance starting point, an arbitrary amount is input (step S701), and the amount of movement in the x and y directions may be calculated (step S702). For example, if the transport direction is θ and the arbitrary amount is L, the movement amount is L × cos θ in the x direction and L × sin θ in the y direction. If the conveyance member is the conveyance source, the movement amount is added, and if the conveyance member is the conveyance destination, a negative value of the obtained movement amount may be added as the movement amount (step S703).
[0027]
FIG. 8 is a flowchart showing the process of the condition setting method according to the fourth embodiment of the present invention. Referring to the condition file stored in the input unit 1 of FIG. 1 or the external storage unit 6, as a conveyance condition, for example, a value representing hardness such as the Young's modulus of a member or rubber hardness if rubber, For example, the diameter of the roller, the thickness of the rubber roller, the member shape such as the rubber thickness, the pressing force of the conveying member, the material (bending rigidity or Young's modulus) and the thickness of the sheet are input (step S801). The external storage unit 6 shown in FIG. 1 has a reference DB of transport support angles using these as reference parameters. The conveyance support angle is determined from the DB based on the input parameters (steps S802 and S803).
[0028]
Further, FIG. 9 is a diagram showing a state in which the conveyance conditions based on the conveyance start point and the conveyance support angle are displayed on the display, and the conveyance condition 91 is shown as an arrow.
[0029]
Next, FIG. 10 is a block diagram showing a configuration of a system that is activated by a medium recorded by a condition setting program according to the condition setting method of the present invention. That is, this figure shows hardware constructed from a microprocessor or the like that executes software according to the condition setting method in the above embodiment. In FIG. 1, the condition setting system includes an interface (hereinafter abbreviated as I / F) 101, a CPU 102, a ROM 103, a RAM 104, a display device 105, a hard disk 106, a keyboard 107, and a CD-ROM drive 108. A general-purpose processing device is prepared, and a program for executing the condition setting method of the present invention is recorded on a readable recording medium such as the CD-ROM 109. Further, a control signal is input from an external device via the I / F 101, and an instruction from the operator or a program of the present invention is automatically activated by the keyboard 107. The CPU 102 performs processing such as condition setting according to the above-described condition setting method according to the program, stores the processing result in a storage device such as the RAM 104 or the hard disk 106, and outputs it to the display device 105 or the like as necessary. As described above, by using the medium recorded with the program for executing the condition setting method of the present invention, the condition setting apparatus can be used universally without changing the existing system.
[0030]
In addition, this invention is not limited to the said Example, It cannot be overemphasized that various deformation | transformation and substitution are possible if it is described in a claim.
[0031]
【The invention's effect】
As described above, in order to perform a computer simulation of a state in which the sheet-like structure is conveyed and deformed by frictional contact between the sheet-like structure and the conveying member that conveys the sheet-like structure, using the sheet-like structure as an analysis model The condition setting device of the present invention for setting the input condition of the present invention includes a selection means for selecting two conveying members, an intersection coordinate calculating means for calculating the intersection coordinates of the selected conveying members, and a slope of a straight line connecting the obtained intersections. Or, when the intersection is a contact point, it is characterized by comprising an inclination calculating means for calculating the inclination of the tangent. Further, according to the condition setting method, the condition such as the boundary condition is set using the intersection coordinate value of the selected two conveying members and the straight line connecting the intersection or the inclination of the tangent when the intersection is a contact point. . Therefore, it is possible to easily set input conditions for computer simulation simply by selecting a conveying member.
[0032]
In another aspect of the invention, the condition setting device includes: a selection unit that selects two conveyance members; an intersection coordinate calculation unit that calculates an intersection coordinate of the selected conveyance member; and a slope of a straight line connecting the obtained intersection points, or When the intersection is a contact point, the first inclination calculation means for calculating the inclination of the tangent, the arbitrary ratio input means for inputting an arbitrary ratio, and the inclination of the tangent that touches the conveyance member at the intersection of one of the conveyance members is calculated. The slope obtained by the first slope means obtained by multiplying the difference between the slope obtained by the second slope means and the slope obtained by the second slope means and the slope obtained by the first slope means by the input arbitrary ratio. And a means for adding to. Also, in the condition setting method, the boundary condition is obtained by adding or subtracting an angle obtained by multiplying the angle between the tangent line of each conveying member at the intersection point and the straight line connecting the intersection points by an arbitrary ratio to the slope of the tangent line. Etc. are set. Therefore, the input condition can be easily corrected.
[0033]
Still further, the condition setting device according to another aspect of the invention includes a selection unit that selects two conveyance members, an intersection point coordinate calculation unit that calculates an intersection point coordinate of the selected conveyance member, and a slope of a straight line connecting the obtained intersection points, or the intersection point 1 is a first inclination calculation means for calculating the inclination of the tangent line, an arbitrary amount input means for inputting an arbitrary amount, and an inclination obtained by the first inclination calculation means from the intersection obtained by the intersection coordinate calculation means And a means for calculating the coordinates of a point moved by an arbitrary amount inputted in the direction. In the condition setting method, a condition such as a boundary condition is set using a coordinate value of a point obtained by moving the intersection point in the direction of the tangent line by an arbitrary amount. Therefore, it is possible to easily correct the input conditions for executing good calculation.
[0034]
Also, the selected two conveying member shapes and the intersection of the two conveying members or the point at which the intersecting point is moved by an arbitrary amount in the direction of the tangent slope, the straight line connecting the intersections or the intersection is the contact point In this case, the arrow indicates the direction of the tangent slope, or the value obtained by adding the angle obtained by multiplying the angle between the tangent line of each conveying member at the intersection point and the straight line connecting the intersection points to an arbitrary ratio to the tangential slope. By displaying the arrow shape matched with the direction of the arrow in a graphic form on the display device, the set transport conditions can be visually confirmed, and erroneous settings can be reduced.
[0035]
Furthermore, by having a database in which the conveyance direction is referenced from the value input by the conveyance member condition setting input means for inputting the shape, hardness, and pressure of the selected conveyance member and the input value of the sheet-like structure to be simulated, The burden of the user paying attention to the setting conditions can be reduced, and more realistic simulation can be realized.
[0036]
As another invention, a state in which a sheet-like structure is conveyed and deformed by a frictional contact between a sheet-like structure and a conveying member that conveys the sheet-like structure by a computer is used as an analysis model. A condition setting program for executing a condition setting for setting conditions such as a boundary condition of a conveyance force or a conveyance amount applied to a sheet-like structure by a conveyance unit composed of two conveyance members pressed against each other among input conditions for computer simulation Has a function to set conditions such as boundary conditions using the intersection coordinate value of the selected two conveying members and the straight line connecting the intersection points, or the slope of the tangent line when the intersection point is a contact point There is a feature in the medium on which the condition setting program is recorded. Therefore, the condition setting device can be used for a general purpose without changing the existing system by the medium in which the condition setting program having such a function is recorded.
[Brief description of the drawings]
FIG. 1 is a block diagram showing the configuration of a system that executes a condition setting method of the present invention.
FIG. 2 is a diagram illustrating a state in which boundary conditions are set when two rollers are selected as a conveying unit.
FIG. 3 is a diagram illustrating a state in which boundary conditions are set when one of the transport rollers is completely rigid.
FIG. 4 is a diagram illustrating a state in which boundary conditions are set when a transport member is a transport source.
FIG. 5 is a flowchart showing processing of a condition setting method according to the first embodiment of the present invention.
FIG. 6 is a flowchart showing processing of a condition setting method according to a second embodiment of the present invention.
FIG. 7 is a flowchart showing processing of a condition setting method according to a third embodiment of the present invention.
FIG. 8 is a flowchart showing processing of a condition setting method according to a fourth embodiment of the present invention.
FIG. 9 is a diagram illustrating a state in which conveyance conditions based on a conveyance start point and a conveyance support angle are displayed on a display.
FIG. 10 is a block diagram showing a configuration of a system that is activated by a medium recorded with a condition setting program according to the condition setting method of the present invention.
FIG. 11 is a flowchart of a computer simulation program for analyzing sheet conveyance.
[Explanation of symbols]
21, 22 transport rollers, 23 intersections, 24 transport directions, 25 horizontal axes,
26 transport support angle, 27, 42 transport start point, 28 transport boundary line,
29 transport area, 31 tangent, 32 radius, 41 arbitrary amount, 91 transport conditions.

Claims (9)

An input condition for performing a computer simulation of a state in which the sheet-like structure is conveyed and deformed by frictional contact between the sheet-like structure and a conveying member that conveys the sheet-like structure, using the sheet-like structure as an analysis model In the condition setting device for setting
Selecting means for selecting two conveying members;
Intersecting point coordinate computing means for computing the intersecting point coordinates of the selected conveying member;
An apparatus for setting conditions, comprising: an inclination of a straight line connecting the obtained intersections, or an inclination calculating means for calculating an inclination of a tangent when the intersection is a contact point. An input condition for performing a computer simulation of a state in which the sheet-like structure is conveyed and deformed by frictional contact between the sheet-like structure and a conveying member that conveys the sheet-like structure, using the sheet-like structure as an analysis model In the condition setting device for setting
Selecting means for selecting two conveying members;
Intersecting point coordinate computing means for computing the intersecting point coordinates of the selected conveying member;
A first slope calculating means for calculating a slope of a straight line connecting the obtained intersections, or a slope of a tangent when the intersection is a contact;
An arbitrary ratio input means for inputting an arbitrary ratio;
A second inclination means for calculating an inclination of a tangent line in contact with the conveying member at an intersection of one conveying member;
A value obtained by multiplying the difference between the inclination of the tangent obtained by the second inclination means and the inclination obtained by the first inclination means by the input arbitrary ratio is added to the inclination obtained by the first inclination means. A condition setting device. An input condition for performing a computer simulation of a state in which the sheet-like structure is conveyed and deformed by frictional contact between the sheet-like structure and a conveying member that conveys the sheet-like structure, using the sheet-like structure as an analysis model In the condition setting device for setting
Selecting means for selecting two conveying members;
Intersecting point coordinate computing means for computing the intersecting point coordinates of the selected conveying member;
A first slope calculating means for calculating a slope of a straight line connecting the obtained intersections, or a slope of a tangent when the intersection is a contact;
An arbitrary amount input means for inputting an arbitrary amount;
And means for calculating the coordinates of the point moved by the arbitrary amount in the direction of the inclination obtained by the first inclination calculating means from the intersection obtained by the intersection coordinate calculating means. Condition setting device. The shape of the selected two conveying members and the intersection of the two conveying members or the point where the intersection is moved by an arbitrary amount in the direction of the inclination of the tangent, and the straight line connecting the intersections, or the intersection is a contact point The slope of the tangent, or the value obtained by adding the angle obtained by multiplying the angle between the tangent of each conveying member at the intersection and the straight line connecting the intersection to an arbitrary ratio to the slope of the tangent. The condition setting device according to any one of claims 1 to 3, wherein an arrow shape obtained by matching the determined direction with the direction of the arrow is displayed on a display device in a graphic form. 5. A database in which a conveyance direction is referred to from a value input by a conveyance member condition setting input means for inputting a shape, hardness, and pressure of a selected conveyance member and an input value of a sheet-like structure to be simulated. The condition setting device according to any one of the above. An input condition for performing a computer simulation of a state in which the sheet-like structure is conveyed and deformed by frictional contact between the sheet-like structure and a conveying member that conveys the sheet-like structure, using the sheet-like structure as an analysis model In the condition setting method for setting conditions such as a boundary condition of a conveyance force or a conveyance amount given to the sheet-like structure by a conveyance unit composed of two conveyance members pressed against each other,
A condition setting method characterized in that the condition such as the boundary condition is set by using an intersection coordinate value of the selected two conveying members and a straight line connecting the intersection or, if the intersection is a contact, an inclination of the tangent . Conditions such as boundary conditions using a value obtained by adding or subtracting an angle obtained by multiplying an angle between the tangent line of each conveying member at the intersection point and a straight line connecting the intersection points to an arbitrary ratio. The condition setting method according to claim 6, wherein: The condition setting method according to claim 6, wherein a condition such as the boundary condition is set using a coordinate value of a point obtained by moving the intersection at an arbitrary amount in the direction of the tangent slope. In order to perform a computer simulation by using a computer to analyze the state in which the sheet-like structure is conveyed and deformed by frictional contact between the sheet-like structure and a conveying member that conveys the sheet-like structure, using the sheet-like structure as an analysis model Medium in which a condition setting program for executing a condition setting for setting conditions such as a conveyance force or a conveyance amount boundary condition applied to a sheet-like structure by a conveyance unit composed of two conveyance members pressed against each other among the input conditions is recorded In
Records a condition setting program that has the function of setting conditions such as the boundary conditions using the intersection coordinate values of the selected two conveying members and the straight line connecting the intersections, or the slope of the tangent line if the intersection is a contact point Media.

Images