JP2002039290A - Timing belt drive analysis method and storage medium storing program for implementing the method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a timing belt drive analysis method capable of clarifying in advance the magnitude of the influence of each variation factor affecting the rotation unevenness of a cylindrical rotating body. The present invention relates to a timing belt drive analysis method for creating an analysis model of a drive mechanism for driving a cylindrical rotating body via a timing belt and analyzing the behavior of the cylindrical rotating body with respect to the operation of a drive shaft. An analysis model including parameters relating to a plurality of factors relating to the timing belt causing the rotation unevenness of the body is created (step S1), a motion equation based on the analysis model is created and registered (step S2), and the motion equation is created. The parameters are independently changed within the range, and the equation of motion is solved each time (step S4), whereby the change range of each factor satisfying the required specification value or the allowable value of the rotation unevenness is obtained (step S5). .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timing belt drive analysis method for preliminarily verifying a timing belt drive system for driving a cylindrical rotating body such as a photosensitive drum of an image forming apparatus such as a copying machine, a printing machine or a laser printer. The present invention relates to a storage medium storing a program for performing the method.

[0002]

2. Description of the Related Art When a photosensitive drum used in a copying machine, a printer, a printing machine, or the like is driven, the power of a drive output shaft, which is a motor shaft, is generally reduced and driven by a gear or a transmission belt. It is. In particular, a belt drive system is widely used because of its high speed and excellent transmission efficiency. For example, in a multicolor stencil printing apparatus that simultaneously prints each color, plate cylinders for each color are provided at intervals in the conveying direction of the printing paper, and the image is transferred by continuously pressing the printing paper. However, a pulley is attached to the drive shaft of each plate cylinder, and a timing belt stretched between the pulleys adjusts the rotation timing of the upstream plate cylinder and the downstream plate cylinder in the printing paper transport direction. ing. In such an apparatus, since each plate cylinder is provided at intervals in the transport direction of the printing paper, the image of the downstream plate cylinder is replaced with the image of the upstream plate cylinder in order to correct the image position shift due to the distance. Is transferred with a rotational phase difference. This printing mechanism is disclosed in "Phase Adjusting Mechanism in Printing Apparatus" of Japanese Patent Application Laid-Open No. H11-129600. As shown in FIG. 9, the printing mechanism includes an upstream pulley 12 fixed to the drive shaft of the upstream plate cylinder 11, a downstream pulley 16 fixed to the drive shaft of the downstream plate cylinder 17, A movable pulley 14 that can be simultaneously moved in a direction perpendicular to the sheet transport direction, a timing belt 15 stretched between these pulleys, and a timing belt 15
It is composed of four tension idlers 13 for giving tension to the motor. In such a timing belt driving mechanism, for example, the timing related to printing of one sheet may take a very long time, and furthermore, if the belt material is formed of a material having an elongation ratio with respect to the tension, it may take a long time to manufacture. Due to factors such as accuracy, a shift in the rotational phase difference between the plate cylinders occurs during printing, which causes a problem that a shift in image position, that is, a so-called ghost phenomenon occurs. Therefore, it is necessary to predict the behavior of the timing belt during transmission in order to reduce such a problem by evaluating the ghost phenomenon in advance at the design stage. The belt design support method disclosed in Japanese Patent Application Laid-Open No. 7-229539 is one of the conventional techniques for analyzing such behavior. In this method, when a vibration is calculated using a vibration calculation model in the belt longitudinal direction of the transmission belt drive system, when the strain applied to the first element modeled as a spring with the belt span portion becomes a tensile strain, the spring constant is calculated. The spring characteristics of the belt span part. On the other hand, when the compression strain occurs, the spring constant is changed to a spring constant lower than the spring characteristic of the belt span portion, and an analysis result close to an actual phenomenon is obtained.

[0003]

However, in the above-mentioned prior art, there is a problem in that a simulation analysis for clarifying in advance the influence of each variation factor affecting the rotation unevenness of the cylindrical rotating body is not performed. Was. An object of the present invention is to solve such a problem of the prior art, and to provide a timing belt drive analysis method and a timing belt drive analysis method capable of elucidating in advance the influence of each variable factor affecting the rotation unevenness of a cylindrical rotating body. An object of the present invention is to provide a storage medium storing a program to be executed.

[0004]

According to a first aspect of the present invention, there is provided an analysis model of a drive mechanism for driving a cylindrical rotary member via a timing belt, and a drive shaft is provided. In the timing belt drive analysis method for analyzing the behavior of the cylindrical rotating body with respect to the operation, as an analysis model including parameters related to a plurality of factors relating to the timing belt that causes rotation unevenness of the cylindrical rotating body,
It is characterized in that a change range of each factor satisfying a required specification value or an allowable value of the rotation unevenness is obtained by independently changing the parameter. According to a second aspect of the present invention, in the timing belt drive analysis method according to the first aspect, an analysis model in which a change in a pitch circle radius of the timing belt is reflected as a parameter as a factor of the rotation unevenness is provided. A change range of the pitch circle radius that satisfies a required specification value or an allowable value is obtained. According to a third aspect of the present invention, in the timing belt drive analysis method according to the first aspect, an analysis model in which a change in a length between a tooth valley portion and a pulley center of the timing belt is reflected in a parameter as a factor of the rotation unevenness. The variation range of the length between the toothed portion of the timing belt and the center of the pulley satisfying the required specification value or the allowable value of the rotation unevenness is obtained.

According to a fourth aspect of the present invention, there is provided the timing belt drive analysis method according to the first aspect, wherein an analysis model in which a change in a physical property value of the timing belt is reflected in a parameter as a factor of the rotation unevenness is provided. A change range of the physical property value of the timing belt satisfying the required specification value or the allowable value of the unevenness is obtained. Claim 5
The invention described in (1) is a timing belt drive analysis method for creating an analysis model of a drive mechanism that drives a cylindrical rotating body via a timing belt and analyzing the behavior of the cylindrical rotating body with respect to the operation of a drive shaft. A change range of each pulley rotation speed that satisfies a required specification value or a permissible value is obtained, and a change range of the single pitch error that satisfies the required specification value or permissible value of the rotation unevenness is obtained from the change range of the pulley rotation angle. Features. The invention according to claim 6 is a timing belt drive analysis method for creating an analysis model of a drive mechanism that drives a cylindrical rotating body via a timing belt and analyzing a behavior of the cylindrical rotating body with respect to an operation of a drive shaft. The change range of the cumulative pitch error that satisfies the required specification value or the allowable value of the rotation unevenness directly from the required specification value or the allowable value of the rotation unevenness using the relationship between the variation amount of the rotation unevenness and the cumulative pitch error of the timing belt. Is obtained. According to a seventh aspect of the present invention, there is provided the invention according to any one of the first to sixth aspects, wherein the variation range of each variation factor obtained in the tilt driving analysis method is provided. The allowable change range of each variation factor is determined based on An eighth aspect of the present invention is characterized in that a program for executing the timing belt drive analysis method according to any one of the first to seventh aspects is stored.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. 9 and 10 are diagrams showing examples to which the timing belt drive analysis method of the present invention is applied. The configuration of the target example in FIG. 9 is as described in the description of the related art. In the target example of FIG. 9,
The upstream pulley 12 fixed to the drive shaft of the upstream plate cylinder 11 is rotated by a drive motor via a timing belt (not shown), and the timing belt is rotated by the rotation of the upstream pulley 12.
Rotate the downstream pulley 16 via the
Rotates the downstream plate cylinder 17 in rotation. Also figure
A target example of 10 is a rotation mechanism for rotating a photosensitive drum 21 built in, for example, an electrophotographic copying machine or a printer. As illustrated, the photosensitive drum 21 is fixed to a drive shaft 22. A driven pulley 23 and a flywheel 24 are fixed to the drive shaft 22, and the driven pulley 23 is a drive pulley.
It is driven to rotate by a timing belt 26 stretched between the belt 25. The drive pulley 25 is connected and fixed to a motor shaft of a drive motor 27, and the drive motor 27 includes an encoder that detects the number of rotations or the rotation angle. An idler pulley 28 that applies a predetermined tension to the timing belt 26 is disposed between the driving pulley 25 and the driven pulley 23. Then, the driving pulley 25 is rotated by the driving motor 27, and the driven pulley 23 is rotationally driven via the timing belt 26 by the rotation of the driving pulley 25,
The rotation of the driven pulley 23 causes the photosensitive drum 21 to rotate. Due to the inertia effect of the flywheel 24, the photosensitive drum 21 rotates stably. In the above description, the upstream plate cylinder 11, the downstream plate cylinder 17, and the photosensitive drum 21
Is a cylindrical rotating body.

FIG. 1 is a block diagram showing a timing belt drive analysis system according to each embodiment of the present invention. As shown in FIG. 1, the timing belt drive analysis system according to this embodiment includes an arithmetic device 1, a data storage device 2, an input device 3, a display device 4, a printer 5, and the like. The arithmetic device 1 has a memory for temporarily storing programs and data and a CPU that operates according to the programs, controls the entire device, and performs analysis and calculations according to the present invention. The data storage device 2 includes a hard disk device or the like, and stores data and programs. The input device 3 is for inputting various data related to the analysis model. Display device 4
Displays messages and analysis results. Printer 5
Outputs the analysis result and the like on a sheet. With such a configuration, in the timing belt drive analysis system according to the first embodiment of the present invention, the rotation unevenness of the cylindrical rotating body (the downstream plate cylinder 17 or the photosensitive drum 21) driven via the timing belt is provided. An analysis model that reflects changes in the belt pitch circle radius or changes in the physical properties of the timing belt, which are the causes of fluctuations, that is, an analysis model that includes parameters related to the belt pitch circle radius, physical properties of the timing belt, etc. Is generated and analyzed so that each variation factor can be independently changed, thereby obtaining a change range of each variation factor in which the rotation unevenness of the cylindrical rotating body satisfies a required specification value or an allowable value.

FIG. 3 shows a schematic operation flow for explaining the entire operation of the timing belt drive analysis system according to the first embodiment of the present invention. Hereinafter, the first of the present invention.
A timing belt drive analysis system according to the embodiment will be described in detail with reference to the drawings. First, FIG. 9 and FIG.
An analysis model as shown in FIG. 2 is manually created from the timing belt drive mechanism as shown in FIG. 10 (step S1). The two circles shown in FIG. 2 are the upstream pulley 12 and the downstream pulley 16 in the example of FIG. 9, and the straight line connecting them is the timing belt. The two circles shown in FIG. 2 are a driving pulley 25 and a driven pulley 23 in the example of FIG. 10, and a straight line connecting them is a timing belt. Next, the user creates the equations of motion of Equations 1 and 2 from the analysis model shown in FIG. 2, and registers (stores) them in the program (step S2). In FIG. 2, Equations 1 and 2, {F} indicates the tension vector of the timing belt (F1, F2, etc. shown in FIG. 2),
{W} indicates the winding amount vector of each pulley (that is, the difference between the winding amounts of the two pulleys on both sides of the timing belt, that is, the extension amount of the timing belt).
[K] indicates a spring stiffness matrix of the timing belt, [c] indicates a spring viscosity matrix of the timing belt, [r] indicates a pulley radius matrix, {θ} indicates a drum rotation angle vector, and I Indicates a matrix of the moment of inertia of the pulley, and R indicates a distance matrix from the center of the timing belt core to the center of the pulley. {F} = [k] {W} + [c] (d {W} / dt) (Equation 1) Here, {W} = [r] {θ}. [I] (d ² ｛θ｝ / dt ² ) = ｛F｝ [R] (Equation 2) The core of the timing belt is located at the center of the timing belt, and the core is sandwiched between the tooth rubber and the back rubber. .

Next, when the registered program is started, the arithmetic unit 1 displays a message and the like, and the physical properties such as the spring rigidity and spring viscosity of the timing belt used in the equations 1 and 2, the pulley radius, the timing belt core wire. The distance from the center to the center of the pulley, the driving force given by the motor, and the like are input by the input device 3 in association with the symbols in Expressions 1 and 2 (Step S3). The distance from the center of the timing belt core to the center of the pulley is a distance obtained by adding the thickness of the tooth rubber of the timing belt to the radius of the pulley. Further, the pitch circle radius of the timing belt is defined as [R] in Expression 2. Subsequently, the arithmetic unit 1 independently changes the input values of the respective fluctuation factors, solves Equations 1 and 2 simultaneously for each value, and solves the drum rotation angle (cylindrical cylinder at each time t). The rotation angle of the rotating body (θ) is determined, and the obtained θ is multiplied by the radius of the cylindrical rotating body to determine the amount of circumferential movement every predetermined time, thereby obtaining the rotation unevenness of the cylindrical rotating body (step S4). Then, a change range of each variation factor that satisfies the required specification value or the allowable value is obtained (step S5), and the result is output to the display device 4 or the printer 5 (step S6). The first embodiment focuses on the pitch circle radius of the timing belt which fluctuates with time as one of the fluctuation factors. In the first embodiment, the physical properties of the timing belt are kept at the initial values (input values). Find the change range of the pitch circle radius of the timing belt that satisfies the specification values. Hereinafter, the operation of this embodiment will be described according to the operation flow shown in FIG. In the operation flow shown in FIG. 4, first, the circumferential movement amount per predetermined time in the case of the initial value is obtained. Then, the pit circle radius of the timing belt is largely shifted to a larger or smaller one, and the circumferential movement amount per predetermined time initially determined by decreasing or increasing by a predetermined amount and the per-predetermined time per unit time are calculated. Are compared, and it is determined whether or not the difference satisfies, for example, a required specification value.

Therefore, an initial value of the pitch circle radius is obtained from the pulley radius and the thickness of the timing belt input first, and in the case of the initial value, an initial process of obtaining the circumferential movement amount per predetermined time is performed ( Step S11). And
For example, the pit circle radius of the timing belt is set to a value greatly shifted to a larger or smaller one by shifting the thickness of the timing belt greatly from the initial value (step S).
12) Calculate the torque (F × R shown in Equation 2) with the value,
Further, the movement amount of the peripheral surface of the cylindrical rotating body per predetermined time is calculated. Further, a difference between the amount of rotation and the amount of rotation per predetermined time from the amount of movement obtained in step S11, that is, rotation unevenness in the setting at that time (step S13), is compared with a required specification value or the like (step S14). . If the required specification value or the like is not satisfied (No in step S14), the pitch circle radius is reduced or increased by a predetermined amount, for example, by resetting the thickness of the timing belt (step S12). Hereinafter, the same operation is repeated, and when the required specification value or the like is satisfied (Yes in step S14), the analysis is terminated. Thus, according to the present embodiment, it is possible to clarify in advance the influence of each variable factor that affects the rotation unevenness of the cylindrical rotating body. In particular, the influence of the fluctuation of the radius of the timing belt pit due to the fluctuation of the thickness of the timing belt can be clarified in advance.

FIG. 5 is an operation flowchart for explaining the operation of the second embodiment of the present invention. In the second embodiment, the variation width of the rotational angular velocity of the cylindrical rotating body (the downstream plate cylinder 17 or the photosensitive drum 21) is calculated for the single pitch error of the timing belt, which is a cause of the fluctuation of the rotation unevenness. Thus, a change range that satisfies the required specification value or the like is determined without solving the equation of motion. Note that the single pitch of the timing belt is the distance between adjacent teeth of the timing belt. The angular velocity of the cylindrical rotating body on the downstream side changes in proportion to such a single-pitch error, and the variation in the angular velocity causes uneven rotation of the cylindrical rotating body. Find the range. Equation 3
5 shows a change range A of the rotational angular velocity of the downstream cylindrical rotary body satisfying the rotation unevenness requirement specification value S. ∫ωRdt−∫ (ω + A * sin (2πt / T)) Rdt = S / 2 (Equation 3) where ω indicates the rotational angular velocity of the cylindrical rotating body, R indicates the radius of the cylindrical rotating body, and T indicates 2 shows a belt cycle. In order to obtain the change range of the rotational angular velocity from Equation 3, in the second embodiment, first, as shown in FIG. 5, a rotation unevenness required specification value S, a radius of a cylindrical rotating body, a belt cycle, and the like are input. It is provided and set by the device 3 (step S21). Then, a change range A of the rotational angular velocity that satisfies the required specification value or the like is obtained using Expression 3 (Step S22). Next, the range of the single pitch error M of the timing belt is calculated by Expression 4. M = ArT / n (Equation 4) where n indicates the number of teeth of the timing belt, and r indicates the radius of the downstream pulley. Thus, according to this embodiment, it is possible to clarify in advance the influence of a single pitch error of the timing belt, which is one of the fluctuation factors affecting the rotation unevenness of the cylindrical rotating body.

FIG. 6 is an operation flowchart for explaining the operation of the third embodiment of the present invention. In the third embodiment, with respect to the accumulated pitch error of the timing belt, which causes the fluctuation of the rotation unevenness, the variation amount of the rotation unevenness and the accumulated pitch The variation range that satisfies the required specification value and the like is determined without solving the equation of motion by directly relating the variation range to the error and directly calculating the variation range of the cumulative pitch error of the timing belt from the required specification value. Therefore, first, the initial values, such as the radius of the downstream pulley and the radius of the downstream cylindrical rotating body, necessary for the calculation based on Equation 5 are input and set by the input device 3 (Step S).
31). Then, using the accumulated pitch error of the timing belt as the amount of elongation of the timing belt, the equation 5 obtained by relating the variation amount of the rotation unevenness and the accumulated pitch error of the timing belt to the timing belt satisfying the required specification value S and the like is obtained by Expression 5. The range N of the accumulated pitch error is obtained (step S3
2). N = (S / 2) * (downstream pulley radius / downstream cylindrical rotating body radius) (Equation 5) As is apparent from Equation 5, if the radius of the downstream pulley and the radius of the downstream cylindrical rotating body are satisfied. Are the same, the range of the cumulative pitch error is half the range of the rotation unevenness fluctuation of the required specification value. This is because the accumulated pitch error has a plus error and a minus error.

FIG. 7 is an operation flowchart for explaining the operation of the fourth embodiment of the present invention. In the fourth embodiment, it is assumed that the physical properties of the timing belt and the like are constant, and the radius of the pulley of Expression 1 is the length between the toothed portion of the timing belt and the center of the pulley, and the length varies with time. By calculating the amount of elongation of the timing belt and the fluctuation of the tension, the width of change in the length between the valley of the timing belt and the center of the pulley that satisfies the required specification value is obtained. That is, H × sin (ωt + φ) is added as a variation of the length between the toothed portion of the timing belt and the center of the pulley. Hereinafter, the operation of the fourth embodiment will be described with reference to FIG. First, the input pulley radius and its variation width H
Find the initial value of the pulley radius considering the time variation from
By solving the equations of motion given by Equations 1 and 2,
In the case of the initial value, an initial process for obtaining the circumferential movement amount per predetermined time is performed (step S41). Then, for example, a value in which the pulley radius in consideration of the variation, that is, the length between the belt tooth valley and the center of the pulley is largely shifted from the initial value to a larger or smaller value by changing the width H of the variation. (Step S42), the amount of elongation of the timing belt and the change in tension are calculated based on the values, and the amount of movement of the peripheral surface of the cylindrical rotating body per predetermined time is calculated. Further, the difference between the amount of movement and the amount of movement determined in step S41, ie, the amount of rotation per predetermined time, that is, the rotation unevenness in the setting at that time is determined (step S43), and is compared with a required specification value (step S44). . If the required specification value or the like is not satisfied (No in step S44), the length between the belt tooth valley and the center of the pulley is reduced or increased (step S42). Less than,
The same operation is repeated, and when the required specification value or the like is satisfied (Yes in step S44), the analysis is terminated. Thus, according to the fourth embodiment, when the variation factor is the temporal variation of the pulley radius in Expression 1, the effect can be clarified in advance.

FIG. 8 is an operation flow chart for explaining the operation of the fifth embodiment of the present invention. In the fifth embodiment, the stiffness matrix k and the viscous matrix c of the timing belt satisfying the rotation unevenness requirement specification value are set to be constant in the timing belt pitch circle radius and the like in the first embodiment. , Time variation λsin (ω
t + φ) is added, and the tension fluctuation due to this is obtained. In addition,
λ is the amplitude of the time variation. Hereinafter, the operation will be described with reference to FIG. 8 in the case of the belt stiffness matrix k. First,
From the input stiffness matrix k and its variation width λ, find the initial value of the stiffness matrix considering the time variation,
In the case of the initial value, an initial process for obtaining the circumferential movement amount per predetermined time is performed (step S51). Then, for example, the rigidity matrix in consideration of the variation is set to a value that is largely shifted from the initial value to a larger or smaller value (step S52), and a tension variation or the like is calculated based on the value, and a predetermined value of the peripheral surface of the cylindrical rotating body is calculated. Calculate the amount of movement per time. further,
A difference between the amount of movement and the amount of rotation per predetermined time from the amount of movement obtained in step S51, that is, rotation unevenness in the setting at that time (step S53), is compared with a required specification value (step S54). If the required specification value or the like is not satisfied (No in step S54), the rigidity value of the timing belt is reduced or increased (step S52). Hereinafter, the same operation is repeated, and when the required specification value or the like is satisfied (Yes in step S54), the analysis is terminated. In the same manner, the influence of the change range of the viscosity matrix c on the rotation unevenness is analyzed. Thus, according to the fifth embodiment, when the variation factor is the temporal variation of the stiffness matrix k and the viscosity matrix of the timing belt in Equation 1, the influence can be clarified in advance.

In each of the embodiments described above, the allowable change range as the design value of the variation factor can be determined based on the obtained variation range of the variation factor. The allowable variation range is allocated to each variation factor based on the magnitude of the influence of each variation factor on the rotation unevenness obtained so far and the difficulty of narrowing the allowable variation range, and even if each variation factor varies in parallel, The required specification value of rotation unevenness is satisfied. Further, a machine-readable storage medium storing a program for implementing the timing belt drive analysis method of the present invention described above is obtained. In this case, the information storage device such as a personal computer reads the program stored in the storage medium, so that the information processing device can also execute the timing belt drive analysis method according to the present invention.

[0016]

As described above, according to the first aspect of the present invention, an analysis model including parameters relating to a plurality of factors relating to the timing belt causing the rotation unevenness of the cylindrical rotary body is provided, and the parameters are set as the analysis model. Since the change range of each factor that satisfies the required specification value or the permissible value of the rotation unevenness is obtained by independently changing, the magnitude of the influence of each variable factor affecting the rotation unevenness of the cylindrical rotating body is clarified in advance. can do. According to the second aspect of the present invention, in the timing belt drive analysis method according to the first aspect, the analysis model is such that a change in a pitch circle radius of the timing belt is reflected in a parameter as a factor of the rotation unevenness, Since the change range of the pitch circle radius that satisfies the required specification value or allowable value of the rotation unevenness is obtained, it is necessary to clarify in advance the magnitude of the influence of the change in the pitch circle radius of the timing belt on the rotation unevenness of the cylindrical rotating body. it can. According to the third aspect of the present invention, in the timing belt drive analysis method according to the first aspect, a change in the length between the tooth valley portion and the pulley center of the timing belt is reflected in the parameter as a factor of the rotation unevenness. Since the analysis model to be obtained and the change range of the length between the pulley center and the timing belt tooth valley satisfying the required specification value or the allowable value of the rotation unevenness are obtained, the tooth valley of the timing belt with respect to the rotation unevenness of the cylindrical rotating body is obtained. And the magnitude of the influence of the change in the pulley center length can be clarified in advance. According to a fourth aspect of the present invention, in the timing belt drive analysis method according to the first aspect, the analysis model is such that a change in a physical property value of the timing belt is reflected in a parameter as a factor of the rotation unevenness, Since the change range of the physical property value of the timing belt that satisfies the required specification value or the allowable value of the rotation unevenness is obtained, it is necessary to clarify in advance the magnitude of the influence of the change in the physical property value of the timing belt on the rotation unevenness of the cylindrical rotating body. it can. According to the fifth aspect of the present invention, a timing belt drive analysis for creating an analysis model of a drive mechanism for driving a cylindrical rotary body via a timing belt and analyzing the behavior of the cylindrical rotary body with respect to the operation of the drive shaft. In the method, a change range of each pulley rotation speed that satisfies the required specification value or tolerance value of the rotation unevenness is obtained, and the single pitch error that satisfies the required specification value or tolerance value of the rotation unevenness is obtained from the change range of the pulley rotation angle. , The magnitude of the effect of the single pitch error change of the timing belt on the rotation unevenness of the cylindrical rotating body can be clarified in advance.

According to the present invention, an analysis model of a drive mechanism for driving a cylindrical rotating body via a timing belt is created, and a timing of analyzing the behavior of the cylindrical rotating body with respect to the operation of the drive shaft. In the belt drive analysis method, the required specification value or the allowable value of the rotation unevenness is directly satisfied from the required specification value or the allowable value of the rotation unevenness using a relationship between the variation amount of the rotation unevenness and the accumulated pitch error of the timing belt. Since the change range of the accumulated pitch error is obtained, the magnitude of the influence of the accumulated pitch error change of the timing belt on the rotation unevenness of the cylindrical rotating body can be clarified in advance. According to a seventh aspect of the present invention, in the timing belt drive analysis method according to any one of the first to sixth aspects, based on the obtained change range of each of the fluctuation factors. Since the allowable change range of each variation factor is determined, a timing belt drive system that can satisfy the required specification value or the allowable value of the rotation unevenness of the cylindrical rotating body can be designed with a small number of trial productions. According to an eighth aspect of the present invention, there is provided a storage medium storing a program for executing the timing belt drive analysis method according to any one of the first to seventh aspects. 2. The information processing device according to claim 1, wherein the program stored in each storage medium is read and executed by the information processing device.
The effect of the invention described in any one of claims 7 to 7 can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a timing belt drive analysis system according to each embodiment of the present invention.

FIG. 2 is an explanatory diagram for describing an example of an analysis model by a timing belt drive analysis method according to each embodiment of the present invention.

FIG. 3 is a flowchart showing a schematic operation flow for explaining the entire operation of the timing belt drive analysis system according to the first embodiment of the present invention.

FIG. 4 is another operation flowchart for explaining the operation of the timing belt drive analysis method according to the first embodiment of the present invention.

FIG. 5 is an operation flowchart for explaining the operation of the timing belt drive analysis method according to the second embodiment of the present invention.

FIG. 6 is an operation flowchart for explaining the operation of the timing belt drive analysis method according to the third embodiment of the present invention.

FIG. 7 is an operation flowchart for explaining the operation of the timing belt drive analysis method according to the fourth embodiment of the present invention.

FIG. 8 is an operation flowchart for explaining an operation of a timing belt drive analysis method according to a fifth embodiment of the present invention.

FIG. 9 is an explanatory diagram relating to a timing belt drive analysis method of the present invention and a conventional technique.

FIG. 10 is another explanatory diagram relating to the timing belt drive analysis method of the present invention and the prior art.

[Explanation of symbols]

1 arithmetic unit, 2 data storage device, 3 input device, 4
Display device, 5 printer, 11 upstream plate cylinder, 12 upstream pulley, 15 timing belt, 16 downstream pulley,
17 Downstream plate cylinder, 21 Photoconductor drum, 22 Drive shaft, 23
Driven pulley, 25 drive pulley, 26 timing belt, 27
Drive motor.

Claims (8)

[Claims] 1. A timing belt drive analysis method for creating an analysis model of a drive mechanism for driving a cylindrical rotating body via a timing belt and analyzing a behavior of the cylindrical rotating body with respect to an operation of a drive shaft. An analysis model including parameters relating to a plurality of factors relating to a timing belt causing rotation unevenness, and a change range of each factor satisfying a required specification value or an allowable value of the rotation unevenness is obtained by independently changing the parameters. A timing belt drive analysis method, characterized in that: 2. The timing belt drive analysis method according to claim 1, wherein a change in a pitch belt radius of the timing belt is reflected in a parameter as a factor of the rotation unevenness, and a required specification value of the rotation unevenness or A timing belt drive analysis method, wherein a change range of the pitch circle radius that satisfies an allowable value is obtained. 3. The timing belt drive analysis method according to claim 1, wherein the rotation model includes an analysis model in which a change in a length between a tooth valley portion and a pulley center of the timing belt is reflected in a parameter as a cause of the rotation unevenness. A timing belt drive analysis method, wherein a change range of the length between the toothed portion of the timing belt and the center of the pulley satisfying a required specification value or an allowable value of unevenness is obtained. 4. The timing belt drive analysis method according to claim 1, wherein a change in a physical property value of the timing belt is reflected in a parameter as a factor of the rotation unevenness, and a required specification value or a tolerance of the rotation unevenness is used. A timing belt drive analysis method, wherein a change range of a physical property value of the timing belt satisfying the value is obtained. 5. A timing belt drive analysis method for preparing an analysis model of a drive mechanism for driving a cylindrical rotating body via a timing belt and analyzing a behavior of the cylindrical rotating body with respect to an operation of a drive shaft, the timing belt driving analysis method comprising: Find the change range of each pulley rotation speed that satisfies the specification value or the allowable value,
A timing belt drive analysis method, wherein a change range of the single pitch error that satisfies a required specification value or an allowable value of the rotation unevenness is obtained from a change range of the pulley rotation angle. 6. A timing belt drive analysis method for creating an analysis model of a drive mechanism for driving a cylindrical rotary body via a timing belt and analyzing a behavior of the cylindrical rotary body with respect to an operation of a drive shaft, wherein the fluctuation of the rotation unevenness is improved. Using a relationship between the amount and the cumulative pitch error of the timing belt to directly determine the change range of the cumulative pitch error that satisfies the required specification value or the allowable value of the rotation unevenness from the required specification value or the allowable value of the rotation unevenness. Characteristic timing belt drive analysis method. 7. The timing belt drive analysis method according to claim 1, wherein an allowable change range of each variation factor is determined based on the determined variation range of each variation factor. A timing belt drive analysis method characterized by determining. 8. A machine-readable storage medium storing a program for executing the timing belt drive analysis method according to claim 1. Description: