JP2009201340A - Stepping motor drive controller, sheet member post-treatment device, stepping motor inspection device, stepping motor inspection system, and method of detecting step-out of stepping motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stepping motor drive controller, a sheet member post-treatment device, a stepping motor inspection device, and a stepping motor inspection system, capable of easily performing a step-out detection of a stepping motor without increasing the costs. <P>SOLUTION: The controller includes a motor driver 607 capable of switching a plurality of set-up current values, a control board 600 on which a CPU 601 with a ROM 604 storing control current values is mounted, and a switching means for switching the set-up current value to a current value smaller than usual to put an own device in an inspection mode. A stepping motor 212 is driven with a constant current. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a control device for a stepping motor, its inspection device, an inspection system, and a sheet member post-processing device.

  Conventionally, stepping motors are often used for sheet member conveyance and movement of movable parts in sheet member post-processing devices, and the driving method is generally a constant current driving method that has better torque output characteristics than a constant voltage driving method. Is.

  When the constant current driving method is used, a necessary torque for each load operated by the stepping motor is calculated, and a constant current that can secure a sufficient margin for the necessary torque is set.

  In general, the driving current of the motor is gradually decreased, and the current value when the motor steps out is multiplied by a coefficient of 1 or more.

  In Patent Document 1, the drive current of the stepping motor is sequentially reduced using control by the CPU, the drive current value when the motor steps out is measured, and the drive current during normal operation is determined based on this, A motor drive control device stored in a memory is disclosed.

In Patent Document 2, a necessary set current value is calculated based on the driving amount (usage amount) of the stepping motor and the torque characteristics of the motor, and based on this, the driving current during normal operation is determined and stored in the memory. A motor drive control device for storage is disclosed.
Japanese Patent Laid-Open No. 11-215890 Japanese Patent No. 3818447

  However, in any motor drive control device, a rewritable memory for storing the calculated drive current value is necessary, which causes a cost increase.

  Further, in the manufacturing process of the device on which the stepping motor is mounted, it is inspected whether there are any abnormalities or problems in the component parts and assembly of the assembled device. As the inspection method, pass / fail is judged by actually passing the sheet member and whether or not the desired processing is performed, but due to the assembly failure in the manufacturing process, the load on the stepping motor is more than expected. If it becomes larger, the set current is calculated under that condition, so the current value required for driving the motor becomes larger, resulting in increased power consumption, abnormal increase in motor temperature, and motor damage due to temperature increase. I was invited.

  The present invention has been made in view of such problems, and a stepping motor drive control device, a sheet member post-processing device, a stepping motor inspection device, and a stepping motor that easily realize step-out detection of a stepping motor without increasing costs. It is an object to provide an inspection system and a stepping motor step-out detection method.

  To achieve the above object, the present invention provides, as a first aspect, a control board on which an arithmetic device including a current control unit capable of switching a plurality of set current values and a non-volatile storage unit for storing the control current values is mounted. And a switching means for switching the set current value to a current value smaller than normal and switching the apparatus to the inspection mode, and providing a stepping motor drive control device that drives the stepping motor at a constant current.

  In order to achieve the above object, as a second aspect, the present invention includes a stepping motor drive control device according to the first aspect of the present invention, and uses a plurality of guide members driven by the stepping motor. A sheet member post-processing apparatus characterized by aligning sheet members is provided.

  In order to achieve the above object, as a third aspect, the present invention is calculated from the actual number of rotations of the rotating shaft of the stepping motor and the number of driving steps set for the stepping motor when the stepping motor is driven. The present invention provides a stepping motor inspection device having means for comparing the theoretical number of rotations and determining the presence or absence of step-out.

  In order to achieve the above object, the present invention provides, as a fourth aspect, the stepping motor drive control device according to the first aspect of the present invention and the actual rotation of the rotating shaft of the stepping motor in the inspection mode. A means for judging the presence or absence of step-out in the motor drive control device by comparing the number and the theoretical number of rotations calculated from the drive step number set for the stepping motor by the arithmetic device when driving the stepping motor The present invention provides a stepping motor inspection system including an inspection apparatus having the above-described inspection apparatus.

  In order to achieve the above object, the present invention provides, as a fifth aspect, an inspection device in which rotation of a sheet member conveying roller shaft that is driven by a stepping motor disposed in an inspected device and conveys a sheet member is transmitted. The actual number of rotations of the shaft is measured by performing the inspection mode operation under a certain load, and compared with the theoretical number of rotations of the sheet member conveyance roller shaft when the inspection mode operation is performed. Accordingly, the present invention provides a stepping motor step-out detection method characterized by determining whether or not a stepping motor has stepped out.

  In order to achieve the above object, according to a sixth aspect of the present invention, there is provided a sheet member conveyance roller shaft that is driven by a stepping motor disposed in an inspected device to convey a sheet member, and a sheet member conveyance roller shaft. A stepping motor inspection apparatus comprising: an inspection shaft to which rotation is transmitted; a rotation speed detection means for measuring the rotation speed of the inspection shaft; and a load application means for applying a load to the inspection shaft. The actual rotation speed of the stepping motor measured by the rotation speed detection means by performing the inspection mode operation with a constant load applied to the inspection shaft and the sheet member conveyance roller shaft when the inspection mode operation is performed The stepping motor drive control device is characterized in that it is judged whether or not the stepping motor has stepped out by comparing with the theoretical rotational speed of the stepping motor. It is intended to.

  In order to achieve the above object, the present invention provides, as a seventh aspect, a sheet member post-processing apparatus comprising the stepping motor drive control device according to the sixth aspect of the present invention. It is.

  According to the present invention, a stepping motor drive control device, a sheet member post-processing device, a stepping motor inspection device, a stepping motor inspection system, and a stepping motor step-out can be easily realized without increasing the cost. A detection method can be provided.

A preferred embodiment of the present invention will be described.
FIG. 1 shows a configuration of a sheet member post-processing apparatus according to the present embodiment. The sheet member post-processing apparatus 1 is provided with a conveyance guide plate 201, an opening / closing guide plate 202, and a paper discharge guide plate 203, and a conveyance path 204 is formed by these.
In the uppermost stream of the conveyance path 204, a conveyance inlet 205 is opened by a conveyance guide plate 201 and an opening / closing guide plate 202, and an inlet sensor 206 that detects a sheet position is provided immediately after the conveyance inlet 205. A conveyance roller pair 207 is provided downstream in the vicinity of. Further, a paper discharge roller pair 208 is provided downstream of the conveyance path 204, and a paper discharge sensor 209 is provided upstream in the vicinity of the paper discharge roller pair 208.

  As shown in FIG. 2, the driving rollers (207a, 208a) of the transport roller pair 207 and the discharge roller pair 208 are connected to a stepping motor 212 via a pulley 210 and a timing belt 211, so that the stepping motor Each roller pair 207 and 208 is rotated by the rotational drive of 212.

  As shown in FIGS. 3A and 3B, the drive side roller 208 a of the paper discharge roller pair 208 is provided with a swing arm 213 so as to be rotatable coaxially, and the swing arm 213 is elastic. A hitting roller 214 made of a friction member (sponge) is provided. The hitting roller 214 is connected to a pulley 220 fixed on the driving side discharge roller 208a shaft via a timing belt 215, a pulley 216, a shaft 217, a pulley 218, and a timing belt 219. The hitting roller 214 is rotated in the same direction by the rotation of 208a.

  In addition, the swing arm 213 is constantly loaded in the direction of the staple tray 401 by its own weight or the elastic force of a spring (not shown), and is pushed against the stopper 222 by the lever 221 loaded in the opposite direction. It is held in the contacted position. By the reciprocating movement of the lever 221, the swing arm 213 rotates in the direction of the staple tray 401 and the tapping roller 214 contacts the staple tray 401, and further rotates and abuts against the stopper portion 222 to stop. .

  As shown in FIG. 4, the reciprocating rotation of the lever 221 is driven by a DC / SOL (direct current solenoid) 223 connected to the lever 221.

  Alternatively, as shown in FIG. 5, the cam 226 connected through the timing belt 225 is rotated by the rotation driving of the stepping motor 224 and is driven by the rotation of the cam protrusion 226 a inserted in the link portion 227 of the lever 221. Is done.

Further, as shown in FIG. 6, a gear 228 is fitted to the driving roller 208a of the paper discharge roller pair 208, and a holder 229 is rotatably provided on the driving roller shaft of the paper discharge roller pair 207. Yes.
The holder 229 is provided with a return roller 230 made of an elastic friction member (sponge) and is connected to the gear 228 via an intermediate gear 231. As a result, the rotation of the drive-side paper discharge roller 208a is transmitted to the return roller 230. Further, the holder 229 is always loaded in the direction of the staple tray 401 due to its own weight and the weight of the return roller 230, and the outer periphery of the return roller 230 rotates in a state of being always in contact with the staple tray 401.

Next, the configuration of the sheet aligning unit will be described.
FIG. 7 shows the configuration of the sheet aligning unit. The staple tray 401 is provided with a pair of alignment means and alignment plates (hereinafter referred to as jogger fences) 402 and 403. The jogger fences 402 and 403 are inserted into a guide shaft (not shown) fixed to the staple tray 401. Yes.

  Furthermore, the jogger fences 402 and 403 are connected to stepping motors 406 and 407 via timing belts (not shown), respectively, and the stepping motors 406 and 407 also perform linear reciprocation by forward / reverse rotation driving.

  The staple tray 401 is provided with home sensors 408 and 409 for detecting the standby positions of the jogger fences 402 and 403. Further, the staple tray 401 is provided with reference fences 410 and 411.

Next, the operation of each unit from sheet carry-in to alignment will be described.
8 and 9 show the operation timing of each part.
When the sheet transport direction length is small (B5Y / A4Y), the sheet discharged from the image forming apparatus enters the carry-in entrance 205 of the sheet post-processing apparatus 1, and the entrance sensor 206 detects the leading edge of the sheet. After a certain amount of conveyance (for example, after conveyance of 20 mm), the stepping motor 212 accelerates and conveys the sheet from the receiving linear speed (138 mm / s) to 500 mm / s.
When the length of the sheet in the conveyance direction is a large size (other than the above), the sheet is accelerated and conveyed after a certain amount of conveyance after the trailing edge of the sheet passes through an image forming apparatus arrangement sensor (not shown).

  The sheet that is accelerated and conveyed in the conveyance path 204 is conveyed by a certain amount after the sheet trailing edge passes through the inlet sensor 206 (position where the sheet trailing edge reaches 30 mm upstream of the discharge roller pair 208), and then the stepping motor 212. The sheet is decelerated and conveyed by this deceleration, and is decelerated to 200 mm / s for the small size and 300 mm / s for the large size. The sheet is discharged onto the staple tray 401 by the discharge roller pair 208 at the linear speed. The

  After the sheet trailing edge passes through the entrance sensor 206 and is conveyed by a certain amount and passes through the sheet discharge roller pair 208 (after the sheet trailing edge has passed through the sheet discharge roller pair 208 and conveyed by about 5 mm), the DC / SOL 223 or stepping is performed. By driving the motor 224, the lever 221 starts to rotate, the swing arm 213 rotates in the direction of the staple tray 401, and the hitting roller 214 comes into contact with the vicinity of the rear end of the sheet discharged onto the staple tray 401, The rear end of the sheet is conveyed so as to contact the reference fences 410 and 411 by the rotation of the hitting roller 214. Further, the sheet whose rear end is brought into contact with the reference fences 410 and 411 by the hitting roller 214 is further conveyed in the direction of the reference fences 410 and 411 by the rotation of the return roller 230, and the posture is maintained.

10 and 11 show the sheet alignment operation of the pair of jogger fences 402 and 403. FIG.
Simultaneously with receiving the sheet discharge signal from the image forming apparatus, the pair of jogger fences 402 and 403 moves to the receiving position depending on the size in the sheet width direction being conveyed. The movement of the pair of jogger fences 402 and 403 at this time moves to a position of the sheet width +15 mm in the shift mode and stops at the position of the sheet width +7 mm in the stipple mode.

  In the shift mode (FIG. 10), the trailing edge of the sheet passes through the pair of discharge rollers 208 and comes into contact with the reference fences 410 and 411 by the hitting roller 214 and the return roller 230. Move toward the jogger fence 403, align the sheet side edge with the reference side jogger fence 403, retreat 30mm, stop at the receiving position, wait for the next sheet to be discharged, and sequentially The same operation is repeated to align the sheet bundle with the reference side jogger fence 403. Further, after aligning a predetermined number of sheets and discharging a sheet bundle to the sheet discharge tray 301 by an operation of a discharge claw 430 described later, the next sheet operates by switching the approach side and the reference side of the jogger fences 402 and 403. As a result, the shifting operation is performed in the direction opposite to the immediately preceding sheet bundle. By repeating this a predetermined number of copies, the sheet bundle is shifted and stacked on the paper discharge tray 301. The operation timings of the jogger fences 402 and 403 are all controlled by time management from the detection of the passage of the trailing edge of the entrance sensor 206.

  In the case of the staple mode (FIG. 11), the trailing edge of the sheet passes through the discharge roller pair 208, and the tapping roller 214 starts to rotate. Stop. Further, the sheet rear end abuts against the reference fences 410 and 411 and advances 2.5 mm at the same time, aligns the sheet to the center, moves back to the receiving position and stops again, waits for the next sheet to be discharged, and sequentially becomes the discharged sheet. The above operation is repeated to align the sheet bundle in the center.

  When the predetermined number of alignment operations are completed, the binding device 450 performs binding processing at a predetermined position near the rear end of the sheet bundle, and the discharge claw 430 discharges the paper onto the paper discharge tray 301. Further, the operation timings of the jogger fences 402 and 403 are all controlled by time management from the detection of the passage of the trailing edge of the entrance sensor 206.

Next, the configuration of the paper discharge tray unit will be described.
12 to 14 show the configuration of the paper discharge tray section.
The paper discharge tray 301 is fixed to support members 302 and 303, and the support members 302 and 303 are connected to a drive shaft 306 via timing belts 304 and 305 and a pulley 307.

  Further, a gear 308 is fitted to the drive shaft 306 and is connected to the DC motor 309 via the gear 308.

The discharge tray 301 is moved up and down by the rotation of the DC motor 309.
An end fence 310 is provided substantially vertically at the end of the paper discharge tray 301, and a rotary shaft 312 fitted with a lever 313 is rotatably attached to the end fence 310. Two sheet pressing members 311 are rotatably inserted in the vicinity. The sheet pressing member 311 is provided with a spring (not shown) that pressurizes the front end portion toward the end fence 310.

  Further, a DC / SOL 315 is fixed near one end of the rotating shaft 312, and the rotating shaft 312 reciprocates at a constant angle by the operation of the DC / SOL 315, whereby the lever 313 rotates and the sheet presser is rotated. The member 311 is rotated. The end fence 310 is provided with a seat height detection sensor 314.

  The sheet pressing member 311 is normally stopped at a position where the tip pressing portion 311a protrudes from the sheet alignment surface of the end fence 310 by a pressure spring, and the tip pressing portion 311a is moved to the end fence 310 by the suction operation of the DC / SOL 315. It rotates from the sheet alignment surface to a position where it is completely buried.

  The detection of the stacked sheet height of the sheet discharge tray 301 is performed by pushing up the front end pressing portion 311a of the sheet pressing member 311 in which the upper surface of the stacked sheet protrudes from the end fence 310 by raising the sheet discharge tray 301. The sheet height detection sensor 314 detects the detection unit provided in a part of the sheet.

Next, the operation of the paper discharge tray unit during sheet discharge will be described.
15 and 16 show the operation of the paper discharge tray.
The sheet discharge tray standby position when the sheet is discharged to the sheet alignment portion by the discharge roller pair 208 is detected by the sheet height detection sensor 314 as the discharge tray 301 pushes up the leading end pressing portion 311a of the sheet pressing member 311. Or a position raised by a predetermined height from the position, and the sheet bundle aligning operation and binding operation are performed at this position.

  The sheet bundle aligned by the jogger fences 402 and 403 and subjected to the shift process and the staple process is discharged to the sheet discharge tray 301 by the advancement of the discharge claw 430 (FIG. 15A). At the same time as the discharge claw 430 moves forward and stops, the DC / SOL 315 sucks and rotates to a position where the sheet pressing member 311 is completely buried from the end fence 310 (FIG. 15B).

  At the same time as the discharge claw 430 is stopped, the DC motor 309 starts to drive, lowers the discharge tray 301 by a predetermined distance, and drops and stacks the sheet bundle on the discharge tray 301 (FIGS. 15C and 15D). ). Further, at the same time as the discharge tray 301 is lowered after being lowered by a predetermined amount, the DC / SOL 315 is turned off, the sheet pressing member 311 protrudes from the end fence 310 again (FIG. 15E), and immediately after that, the discharge tray 301 rises again. Then, the upper surface of the sheet bundle stacked on the discharge tray 301 pushes up the sheet pressing member 311 and stops at a position detected by the sheet height detection sensor 314 (FIG. 15 (f)), or a predetermined time after detection. After the height rises, the vicinity of the rear end of the sheet bundle is pressed by the front end pressing portion 311a of the sheet pressing member 311 (FIG. 15G) to prepare for the next sheet discharge (FIG. 15H).

  Further, at the same time when the discharge claw 430 moves forward and stops (FIGS. 16A and 16B), the DC motor 309 is driven to rotate, and the sheet discharge tray 301 is lowered by a predetermined distance, and the sheet bundle is placed on the sheet discharge tray 301. The sheet is dropped and stacked (FIG. 16C), and simultaneously with the stop after the discharge tray 301 is lowered by a predetermined amount, the DC / SOL 315 sucks and rotates to a position where the sheet pressing member 311 is completely buried from the end fence 310 ( In FIG. 16D, immediately after the DC / SOL 315 is turned off, the sheet pressing member 311 protrudes again from the end fence 310 (FIG. 16E), and the discharge tray 301 is raised again and stacked on the discharge tray 301. The upper surface of the sheet bundle pushed up the sheet pressing member 311 and stops at a position detected by the sheet height detection sensor 314 (FIG. 16 (f)), or a predetermined time after detection. Stop after elevated, pressing the vicinity of the sheet bundle rear end by pressure end portion 311a of the sheet hold-down member 311 (FIG. 16 (g)), provided the sheet discharge in the following section (FIG. 16 (h)).

FIG. 17 shows the configuration of a control system related to sheet conveyance.
In the control board 600 of the sheet post-processing apparatus, a CPU 601 includes a RAM 603 and a ROM 604 and is connected via a bus 602. The CPU 601 reads the control program from the ROM 604 and executes it. The RAM 603 holds temporary data necessary for control. The CPU 601 is connected to an inlet sensor 206 for controlling the transport roller pair 207 and the paper discharge roller pair 208 and a constant current motor driver 607 for driving the transport motor via the IO ports 605 and 606. Based on the ON / OFF signal from the inlet sensor 206, the trailing edge or leading edge position of the sheet is grasped, and the sheet is conveyed by controlling the stepping motor 212 connected to the motor driver 607 for driving the conveyance motor.

  The CPU 601 is connected to a host device 609 that is an image forming apparatus via a serial bus 608. Further, an external device (here, PC 611) can be connected to the CPU 601 via the serial bus 610. Further, an operational amplifier 615 is connected to the CPU 601 through an analog output port DAo 614, and an output of the operational amplifier 615 is connected to a control power setting input terminal Vref 616 of the motor driver 607 for driving the conveyance motor.

Next, a driving current setting method for the stepping motor 212 will be described.
The driving current Ioh of the stepping motor 212 is simply determined by the voltage input to the control current setting input terminal Vref 616 and the current detection resistor Rs in the motor driver 607, and the calculation formula is as the following formula (1). is there.
Ioh = Vref / Rs (1)

  The voltage value input to the control current setting input terminal 616 is determined by the voltage value Vda output from the analog output port DAo 614 of the CPU 601 and can be arbitrarily set by a program, that is, the driving current Ioh can be set in a plurality of stages. .

Further, the driving current Ioh when the analog output port DAo 614 of the CPU 601 is not used is a resistance (here, resistance 617: resistance value R1, resistance 618: resistance value) connected to the control current setting input terminal Vref 616 as shown in FIG. R2) and the power supply voltage value Vc of the signal system are determined as the following formula (2).
Ioh = {(R2 / R1 + R2) × 5} / Rs (2)

  Since the drive current Ioh in this case is determined by the resistance value, when it is desired to set the drive current Ioh in a plurality of stages, it is necessary to add a separate current switching circuit. Since a known circuit can be used as the current switching circuit, detailed description thereof is omitted.

  Here, the drive current Ioh of the stepping motor 212 during normal use is preset in accordance with the motor drive speed, drive pattern, and the like at the design stage. The setting method is that the motor is driven at the drive speed and drive pattern at which the current is to be set under the conditions where the load on the motor is maximized (the condition where the mechanical load is maximized due to assembly tolerances) and the output torque of the motor decreases. The drive current is gradually decreased during driving, the lower limit current value Io1 that does not step out is obtained, the current value Io1 is compared with the output torque data of the motor, the required torque To1 of the motor is calculated, and the required torque value To1 is further calculated. There is a method in which the current value calculated from the driving torque value multiplied by 1 or more and the output torque data of the motor is used as the driving current Ioh. The reason why the drive torque value is more than 1 times the required torque value is that the mechanical load increases due to assembly tolerances and component tolerances as described above, and the place where the machine is used is low temperature such as in mid-winter. Even if the output torque of the motor is lower than that at normal temperature or the load applied to the motor becomes larger than that at the time of shipment of the machine due to an increase in load due to aging of the machine drive unit, the motor will step out. This is because a margin (torque margin) is included in the drive current value so as not to occur.

  A drive current, for example, Io2, Io3, Io4 is set for each drive speed and drive pattern by the above setting method, and voltage values Vda1 to Vda4 output from the analog output port DAo 614 of the CPU 601 according to the drive current value and the above equation (1). And the analog output port DAo 614 is set on the program, and the data is stored in the ROM 604 in the CPU 601. When the stepping motor 212 is driven, the set values of the analog output port DAo 614 are sequentially called from the ROM 604, and the motor is driven at the motor driving speed and the driving current Ioh for each driving pattern.

Next, a product inspection method at the time of machine assembly / manufacture will be described.
Generally, at the production site, after the assembly of the machine is completed, the machine is actually operated to inspect for any abnormality. Especially in the product inspection of the sheet member post-processing device, the assembled machine is set in the image processing device, the sheet member is actually passed through and post-processing is performed, and the post-processed sheet member is compared with various standard values. By doing product inspection.
At this time, if there is a part forgotten or an assembly error in the assembly process, the post-processed sheet material is out of the standard value, the machine does not operate, or an abnormality including stepping motor step-out. Since operations occur, errors in the assembly process can be detected.

However, if the load applied to the stepping motor becomes large due to a component assembly error, for example, if the tension of the timing belt that transmits the drive of the motor is set to be larger than the standard value, the increased load If the stepping motor is out of step, it can be easily detected by the process inspection.However, if the load increases to the extent that the stepping motor does not step out, it cannot be detected by the process inspection and is normally (normally Machines in which the load applied to the stepping motor is larger than that of the assembled machine) will flow out to the market.
In such a machine with a higher load on the stepping motor than normal (a machine that has been assembled normally), the torque margin of the stepping motor is smaller than the initial setting, and the usage environment at the shipping destination When the temperature of the motor is low or the load on the motor increases due to aging of the parts, the load on the stepping motor further increases and the possibility of step-out occurs.

<First Embodiment>
The case where the step-out inspection of the stepping motor is performed using the process inspection apparatus will be described.
The lower limit current values Io1 to Io4 that are not stepped out, which are obtained when the drive current Ioh of the stepping motor 212 during normal use is set, are conditions that maximize the load on the motor (conditions that maximize the mechanical load due to assembly tolerances) and Even if the motor output torque is low, the current value is such that step-out does not occur, and if the stepping motor 212 is stepped out by setting the current values Io1 to Io4, there is some trouble in the machine. I can judge.

  The lower limit current values Io1 to Io4 that do not step out are set as the set current values Im1 to Im4 in the process inspection mode, and the current value of the stepping motor to be inspected is set to the process inspection current (Im1 to Im4) at the time of inspection after the completion of the machine assembly. By simply operating the machine and confirming the presence or absence of step-out, the presence or absence of assembly errors can be easily inspected.

  When the drive unit by the stepping motor to be detected includes a home sensor, that is, when it is possible to determine whether or not some of the parts that operate with the stepping motor are in the home sensor, the home sensor must be The stepping motor is driven by the number of steps to be turned off, or the stepping motor is driven by the number of steps that are always turned on when the home sensor is OFF, and it is determined whether the home sensor is turned OFF or ON. Existence can be checked.

  On the other hand, when the drive unit by the stepping motor to be inspected does not include the home sensor, the step-out inspection by the above method cannot be performed by, for example, a conveyance motor that drives the sheet member conveyance unit.

A method of detecting a step-out by a drive unit that does not include a home sensor will be described with reference to FIGS.
A machine 660 shown in FIG. 19 is an inspection target, and includes components such as a control board 664, a stepping motor 661 as a driving source, a sensor (not shown), and a roller (not shown). Components such as a CPU 665, a motor driver (not shown), and connectors 666 and 667 are mounted on the control board 664. A driving pulley 668 is press-fitted into the rotating shaft 663 of the stepping motor 661, and further drives a roller or the like via a timing belt or the like. Further, the stepping motor 661 is connected to the control board 664 via the harness 662, and desired control can be performed by a command from the CPU 665.

On the other hand, at the time of machine inspection, a process inspection device 650 is connected to the control board 664 via a harness 652 so that the control state of the stepping motor 661 can be grasped, and data is exchanged between the process inspection device 650 and the CPU 665. Is possible.
Further, an encoder 653 is provided on the side opposite to the drive pulley 668 of the rotation shaft 663 of the stepping motor 661, and the actual number of rotations of the stepping motor rotation shaft 663 can be counted by the pulse count sensor 654.

  FIG. 20 shows an enlarged view of the drive unit of the stepping motor 661. The rotation of the motor is transmitted from the driving pulley 668 to the roller 671 via the timing belt 670, and the sheet member is conveyed by the roller 671.

  FIG. 21 is an enlarged view of the encoder unit. The slit of the rotating encoder 653 is read by the optical axis 672 of the pulse count sensor 654, and the data is transmitted to a computer disposed in the inspection device 650.

The number of clock pulses P1 transmitted from the CPU 665 in the control board 664 to the motor driver for operating the machine after setting the current value of the stepping motor 661 to the process inspection current (Im1 to Im4) and driving the stepping motor 661. Is compared with the number of pulses Pe measured by the pulse count sensor 654 of the encoder 653 attached to the rotating shaft 663 of the stepping motor 661, and if the following equation (3) holds, it is determined that no step-out has occurred. If not, it is determined that there is a step-out, that is, there is some assembly failure in the inspection target.
P1 = Pe (3)

FIG. 22 shows a flow of operation of the inspection target device in the process inspection mode. FIG. 23 shows a flow of operations of the process inspection apparatus 650.
First, it is determined whether the inspection target device is in the process inspection mode (step S100), and the drive current of the stepping motor 661 is set to set current values Im1 to Im4 in the process inspection mode (step S101). Next, a stepping motor 661 drive start (inspection operation start) trigger issued from the process inspection device 650 is entered (step S102), and the stepping motor 661 is driven upon receipt of the trigger (step S103). When the stepping motor 661 is driven by the preset drive pulse number P1, the motor is stopped (steps S104 and S105), and the drive pulse number P1 and the motor drive completion (inspection operation completion) signal are transmitted to the process inspection device 650. (Steps S106, S107).

On the other hand, in the process inspection apparatus 650, when the inspection start is selected by the computer installed in the apparatus (step S200), a trigger for starting the stepping motor 661 (inspection operation start) is issued to the inspection target device (step S201). The encoder pulse count is started (step S202). When the motor drive completion (inspection operation completion) signal and the drive pulse element P1 of the stepping motor 661 are received from the process inspection device 650 (step S203), the pulse count of the encoder is stopped, the pulse count number Pe and the received drive pulse number P1 is stored in a computer installed in the process inspection device 650 (step S204).
After the data storage is completed, the computer compares the pulse count number Pe with the received drive pulse number P1 (step S205), and determines whether the inspection has passed or failed (steps S205 to S207).
If the inspection passes, the inspection target device is sent to the next process, and if it fails, the defective part is repaired.

[Operation when switching between normal use mode and process inspection mode with switch on control board]
FIG. 24 shows a configuration of a stepping motor inspection system including a switch for switching between the normal use mode and the process inspection mode. As shown in FIG. 24, a switch 680 having a plurality of poles is installed on the control board 664, and is connected to the CPU 665 via an IO port. Data set by the pole selection of the switch 680 is stored in the CPU 665. Stored in the RAM.
The device to be inspected monitors the state of the switch 680 after the power is turned on, and when the process inspection mode is selected as shown in FIGS. 25A and 25B, the machine is set to the process inspection mode. Perform the action.
As shown in FIG. 25B, the switch 680 packs other functions, for example, a free-run mode in which the entire load in the machine is operated at a constant interval in the absence of paper, and a paper loading shift tray. It may be combined with functions necessary for the machine for other purposes such as a packing operation mode for moving to the time position.

[Operation when switching between normal use mode and process inspection mode by an external signal]
FIG. 26 shows an operation flow of the process inspection apparatus when switching between the normal use mode and the process inspection mode is performed by an external signal. When the inspection start is selected by the computer installed in the apparatus (step S300), the process inspection apparatus 650 transmits a “process inspection mode signal” to the inspection target device via the harness 662 (step S301). The signal is held in a RAM built in the CPU 665. In the inspection target device, if the signal is held in the RAM after the power is turned on, the machine is set to the process inspection mode and the operation in the process inspection mode is executed. The process inspection device 650 also performs the operations of steps S302 to S308. Since these operations are the same as steps S201 to S207 described above, a duplicate description is omitted.

[Operation when setting the current value in process inspection mode from the outside]
FIG. 27 and FIG. 28 show the flow of operations of the process inspection apparatus and the inspection target device when the current value in the process inspection mode is set from the outside. The set current value of the stepping motor in the process inspection mode is designated by the process inspection device 650, and the stepping motor 661 is driven at the designated current value on the inspection target device side. At this time, for example, if there are four drive patterns and set currents during normal use of the stepping motor to be inspected, a current value corresponding to the drive pattern can be set from a computer installed in the process inspection device 650 (steps S401 to S401). S404). The inspection target device holds the received set current value in the RAM built in the CPU 665, and calls the set current value corresponding to the drive pattern to drive the motor.

[Operation when the current value in the process inspection mode is predetermined by the current setting resistor on the control board]
FIG. 29 shows the configuration of the control system of the sheet member post-processing apparatus in which the current value in the process inspection mode is predetermined by the current setting resistor on the control board. An operational amplifier 615 is connected to the CPU 601 in the control board 600 via an analog output port DAo 614, and the output of the operational amplifier 615 is connected to a control current setting input terminal Vref 616 of the transport motor driver 607 via a resistor 702 (resistance value Ra). Connected. Further, a transistor (here, a base terminal) 703 is connected to the I / O port 700 of the CPU 601 via a resistor, an emitter terminal of the transistor 703 is installed, and a collector terminal is connected via a resistor 701 (resistance value Rb). It is connected to the control power setting input terminal Vref 616 of the motor driver 607 for driving the conveyance motor.

  Here, a transistor is used as an example of the switching element, but another element may be used.

With the above circuit configuration, by setting the I / O port 700 to high level in the process inspection mode, the voltage value applied to Vref 616 of the motor driver 607 is set as shown in the following equation (4), and the motor drive current IoL is set to Can change.
IoL = {(Rb / Ra + Rb) × Va} / Rs (4)
Va: voltage value output from analog output port DAo 614 Rs: current detection resistance value in motor driver 607

  By setting the resistance values Ra and Rb of the resistors 701 and 702 so that the motor driving current IoL becomes a current value desired to be set in the stepping motor in the process inspection mode, it is possible to detect a desired stepping motor step-out.

As described above, according to the present embodiment, the step-out inspection of the stepping motor can be easily performed without increasing the cost. By switching the normal use mode and the process inspection mode on the control board according to the operation of the switching means or the signal input from the outside, the cost of the addition of the switching means and the control of the stepping motor are not complicated. Step-out inspection is possible.
In addition, by making it possible to set the current value in the process inspection mode from the outside, the inspector can arbitrarily set the current value in the process inspection mode even when the criteria for step-out inspection are stricter. Can perform step-out inspection of motors. On the other hand, if the current value in the process inspection mode is determined in advance by the current setting resistor on the control board, the stepping motor can be inspected in a shorter time.
Accordingly, the sheet member post-processing apparatus according to the present embodiment can easily perform step-out inspection of the stepping motor without increasing the cost, and can reduce step-out of the stepping motor due to defective assembly at the customer site.

<Second Embodiment>
An embodiment in the case of performing a step-out inspection of a stepping motor using an inspection jig will be described.
In the present embodiment, a constant operation is performed in a state where a load is applied to the drive unit by the stepping motor, and whether or not there is a step-out is confirmed by simply checking whether there is an assembly error or the like.
FIG. 30 shows a measuring unit 800 of an inspection jig used for step-out inspection of a stepping motor in the present embodiment. FIG. 31 shows a state in which a measuring unit 800 of an inspection jig is attached to the sheet member post-processing apparatus 1 serving as an inspected machine. The conveyance roller shaft 207a corresponds to the drive side roller shaft of the sheet member conveyance roller pair 207 in FIG. FIG. 32 is an enlarged view of a portion where the sheet member post-processing apparatus 1 and the measurement unit 800 are attached. FIG. 33 is a diagram showing a schematic configuration inside the measurement unit 800. FIG. 34 is a diagram simply showing a connection state between the measurement unit 800, the inspection jig control unit 850, and the sheet member post-processing apparatus 1.

  The measuring unit 800 is connected to the conveyance roller shaft 207a of the sheet member post-processing apparatus 1 through the first pulley 802 at the time of inspection, and the rotation of the conveyance roller shaft 207a is performed from the first pulley 802 to the timing belt 801, This is transmitted to the inspection shaft 804 via the second pulley 810.

  A roller 805 is attached to one end of the inspection shaft 804, and a load set by a load setting unit 808 can be applied to the roller 805 via a pressure plate 806 and a connecting rod 807. The load setting unit 808 is mainly composed of an elastic body, in particular, a spring 811 and a holding plate 812, and is configured to apply a load to the roller 805 by contracting the spring 811 with the holding plate 812. The load is set to a desired load using a tension gauge (not shown) before inspection.

  Further, a pulse count unit 809 is provided at the other end of the inspection shaft 804 by mounting an encoder 813. As shown in FIG. 35, the slit of the rotating encoder 813 is inserted into the light of the pulse count sensor 814. It is configured to read with the shaft 815. The state change of the pulse count sensor 814 is counted by the control unit 850 of the inspection jig via the jig cable 851.

  The control unit 850 of the inspection jig is connected to the power connector 620 on the control board 600 of the sheet member post-processing apparatus 1 by the connection cable 626 and supplies power to the sheet member post-processing apparatus 1.

  In the process inspection mode, in response to a command from the CPU 601 on the control board 600, a stepping motor (hereinafter referred to as a conveyance motor) 212 performs an operation for the process inspection mode, and the inspection shaft 804 rotates as the conveyance motor 212 rotates.

  Here, when the total number of drive steps of the conveyance motor 212 in the operation for the process inspection mode is 100,000 pulses, the rotation of the conveyance roller shaft 207a via the conveyance motor pulley 625, the timing belt, and the drive pulley is 1000 rotations. When the rotation ratio between the transport roller shaft 207a and the inspection shaft 804 is 1 to n (n <1), the number of rotations of the inspection shaft 804 is 1000 × n in the operation for the process inspection mode. Here, when an overload is applied to the conveyance motor 212 for some reason such as an assembly failure and the motor output torque is exceeded, a step-out occurs in the conveyance motor 212. When a step-out occurs in the process inspection mode, the conveyance roller shaft 207a does not rotate during the step-out period, and therefore the inspection shaft 804 does not rotate.

  In the present embodiment, a value obtained by multiplying the rotation number of the conveyance roller shaft 207a calculated from the number of driving steps of the conveyance motor 212 in the operation for the process inspection mode by the rotation ratio of the inspection shaft 804 is previously determined. When the operation for the process inspection mode is performed by applying a slight load to the inspection shaft 804 by the load setting unit 808, the measured number of rotations of the inspection shaft 804 and the control unit 850 are stored. If it is equal, if it is equal, it will be judged that there is no step-out, and if it is not equal, it will be judged that there is a step-out in the transport motor 212, and a step-out test will be performed. .

FIG. 36 shows the inspection jig control unit 850 in an enlarged manner.
When the inspection start button 818 is pressed, the state shifts to an inspection mode for measuring the state change of the pulse count sensor 814. When the inspection mode operation is completed, the measurement is stopped when the button is pressed again. If the value stored in advance in the internal calculation unit matches the measured value, the OK determination lamp 820 is lit, and if not, the NG determination lamp 819 is lit. Note that the determination lamp that has been turned on once is turned off when the inspection start button 818 is pressed again.

FIG. 37 shows a flow of operations from the start of stepping motor inspection to determination.
First, it is determined whether or not the inspection start button 818 of the inspection jig has been pressed (step S300). If the examination start button 818 is pressed (step S300 / Yes), the determination button indicating the previous determination result is turned off (step S301). Thereafter, the control unit 850 starts pulse counting (step S302). Next, the operation for the process inspection mode is started in the transport motor 212 of the sheet member post-processing apparatus 1 (step S303). When the operation for the process inspection mode is completed (step S304 / Yes), it waits for the inspection start button 818 to be pressed again (step S305). If the inspection button is pressed again (step S305 / Yes), the pulse count of the control unit 850 is stopped (step S306). Then, based on the measured number of pulses, the number of rotations of the inspection shaft 804 is calculated by the calculation unit, and further multiplied by the rotation ratio (step S307). The control unit 850 compares the calculated measurement value with a value stored in advance (step S308). If both are equal (step S308 / Yes), the OK determination lamp 820 is turned on (step S309). On the other hand, if they are not equal (step S308 / No), the NG determination lamp 819 is turned on (step S310). If the inspection passes, the inspection target device proceeds to the next process. If the inspection fails, the inspection target device is sent to repair the defective portion.
In the actual inspection, the accuracy used for the pulse count sensor 814 and mechanical variations such as the roller diameter and pulley are taken into consideration, and the values used for the determination are given a certain range (in other words, measured values). If it is within a predetermined numerical range, it is judged as a pass judgment). With such a configuration, it is possible to easily perform the step-out inspection of the stepping motor.

  Here, the first pulley 802 and the second pulley 810 are set so that the rotation ratio between the conveyance roller shaft 207a of the sheet member post-processing apparatus 1 and the inspection shaft 804 of the inspection jig measuring unit 800 is 1: 1. Is preferably set. At the time of inspection, the inspection shaft calculated based on the value stored in the control unit 850 of the inspection jig, that is, the rotation number of the transport roller shaft 207a during the operation for the process inspection mode and the number of pulses measured by the arithmetic unit. By comparing with the rotation number of 804, it is determined whether or not the conveyance motor 212 has stepped out. By setting the number of rotations to 1: 1, the stepping motor step-out inspection can be performed without performing complicated calculation and control.

The connection cable 626 that connects the control unit 850 of the inspection jig and the power connector 620 on the control board 600 of the sheet member post-processing apparatus 1 is not only a power line but also a serial that can exchange data between the two. It is preferable to arrange the lines. With this configuration, the number of drive pulses of the conveyance motor 212 in the operation for the process inspection mode is transmitted from the inspected machine to the control unit 850 of the inspection jig when the operation for the process inspection mode is completed, and the number of transmitted pulses Is converted into the rotation speed of the transport roller shaft 207a by the control unit 850, and the converted value is compared with the measured rotation speed of the inspection shaft 804 to check whether or not the stepping motor has stepped out. Yes.
This makes it possible to perform stepping without taking into account variations in the total number of rotations due to program variations (timer count error, stepping motor step number control error, etc.) when performing a series of process inspection mode operations on the machine under test. Can perform step-out inspection of motors.

FIG. 38 shows a flow from the start of the stepping motor inspection to the determination when the inspection jig control unit 850 and the sheet member post-processing apparatus 1 exchange data with each other.
First, it is determined whether or not the inspection start 818 button of the inspection jig has been pressed (step S400). If the inspection start button 818 is pressed (step S400 / Yes), the determination button indicating the previous determination result is turned off (step S401). Thereafter, control unit 850 starts pulse counting (step S402). Next, the operation for the process inspection mode is started in the transport motor 212 of the sheet member post-processing apparatus 1 (step S403). When the process inspection mode operation is completed (step S404 / Yes), the total number of drive pulses of the transport motor 212 of the sheet member post-processing apparatus 1 in the process inspection mode operation is transmitted to the inspection jig control unit 850 (step S405). . When the control unit 850 of the inspection jig completes the reception of the drive pulse number (step S406 / Yes), it waits for the inspection start button 818 to be pressed again (step S407). If the examination start button 818 is pressed again (step S407 / Yes), the pulse count of the control unit 850 is stopped (step S408).
Next, based on the number of pulses measured by the arithmetic unit, the number of rotations of the inspection shaft 804 and the number of rotations of the conveyance roller shaft 207a from the total number of driving pulses of the conveyance motor 212 of the received sheet member post-processing apparatus 1 are obtained. Calculate (step S409). Thereafter, the calculated value is compared with the rotational speed of the inspection shaft 804 and the rotational speed of the transport roller shaft 207a (step S410). If both are equal (step S410 / Yes), the OK determination lamp 820 is turned on (step S411). On the other hand, if they are not equal (step S410 / No), the NG determination lamp 819 is turned on (step S412). If the inspection passes, the inspection target device proceeds to the next process. If the inspection fails, the inspection target device is sent to repair the defective portion.
In this way, by exchanging data between the inspection jig control unit 850 and the sheet member post-processing apparatus 1, it becomes possible to perform the step-out inspection of the stepping motor more accurately, and for the process inspection mode. Even when the operation is changed, it is not necessary to change the program on the inspection jig side.

As described above, the required torque Tol of the motor obtained when setting the drive current Ioh of the stepping motor 212 during normal use is a condition that maximizes the load on the motor (a condition that maximizes the mechanical load due to assembly tolerances) and Even in a low temperature condition where the output torque of the motor is lowered, the step-out should not occur if the output torque of the motor is equal to or higher than Tol. If the stepping motor has stepped out when the set current value of the stepping motor is equal to or greater than the set current value Iol for outputting the motor output Tol, it can be determined that there is some problem in the machine.
The actual stepping motor set current value is set to a drive current Ioh that can output a drive torque value Toh obtained by multiplying the required torque Tol by 1 or more.
The load applied to the inspection shaft 804 can be arbitrarily set by the spring 811 and the holding plate 812, but the holding plate 812 is set so that the torque necessary for driving the stepping motor is not less than Tol and not more than Toh. Therefore, the step-out inspection of the stepping motor can be performed more accurately.

Further, the operation for the process inspection mode of the conveyance motor 212 of the sheet member post-processing apparatus 1 is a paper-free free-run operation, that is, the sheet member is not passed through the sheet member post-processing apparatus 1 and is conveyed at a virtual sheet member conveyance timing. It is preferable to operate the motor 212. In this case, the number of drive pulses of the conveyance motor 212 from the start to the completion of the operation for the process inspection mode is transmitted from the inspected machine to the control unit 850 of the inspection jig, and the number of transmitted pulses is conveyed by the control unit 850 to the conveyance roller. By converting to the rotational speed of the shaft 207a and comparing the converted value with the measured rotational speed of the inspection shaft 804, it is inspected whether or not the stepping motor has stepped out.
By performing the operation for the process inspection mode in the paper-free free-run operation, it is not necessary to use a sheet member at the time of inspection, and the stepping motor can be inspected out of step without extra cost.

Switching between the normal use mode and the process inspection mode is preferably performed by existing switching means on the control board. In this case, as shown in FIG. 39, the control board 600 is provided with a switch 627 having a plurality of poles, and is connected to the CPU 601 via the IO port, and is set by the polarity selection of the switch 627. The stored data is held in the RAM in the CPU 601. In the machine to be inspected, the state of the switch 627 is monitored after the power is turned on. When the process inspection mode is selected, the machine is set to the process inspection mode and the operation for the process inspection mode is performed.
Similar to the first embodiment (FIG. 25B), the switch 627 is used for other functions such as a free run mode in which the entire load in the machine is operated at a constant interval in the absence of paper, It may be combined with a function necessary for the machine for other purposes such as a packing operation mode in which the shift tray is moved to the packing position.
By switching between the normal use mode and the process inspection mode using the switching means on the existing control board, step-out inspection of the stepping motor is possible without causing cost increase and complicated control due to the addition of new switching means. Is possible.

Note that switching between the normal use mode and the process inspection mode may be performed by a signal exchanged between the machine to be inspected and the inspection jig. In this case, when the inspection start button 818 of the inspection jig is pressed during the process inspection, the inspection jig shifts to an inspection mode for measuring the state change of the pulse count sensor 814 and at the same time, a “process inspection mode start signal” through the connection cable 626. Is sent to the machine under test. In the inspected machine, the operation for the process inspection mode is performed with the signal reception as a trigger. When the operation for the process inspection mode is completed, the inspected machine transmits an “operation completion signal” to the inspection jig. The inspection jig receives the operation completion signal, stops the pulse count, and then performs calculation and determination processing.
Switching between the normal use mode and the process inspection mode is performed by a signal exchanged between the machine to be inspected and the inspection jig, allowing step-out inspection of stepping motors without increasing costs due to the addition of switching means. It is.

A connection cable 626 that connects the control unit 850 of the inspection jig and the power connector 620 on the control board 600 of the sheet member post-processing apparatus 1 is used to supply power from the inspection jig to the device to be inspected and to exchange data between them. Although used, the shape and wiring specifications of the connector of the control unit 850 of the inspection jig should be the same as the connector on the image forming apparatus side of the cable connecting the sheet member post-processing apparatus 1 and the image forming apparatus (not shown) in actual use. Thus, the existing interconnection cable between the sheet member post-processing apparatus and the image forming apparatus can be diverted for connection between the inspection jig and the sheet member post-processing apparatus.
Thereby, the step-out inspection of the stepping motor motor can be easily performed without increasing the cost.

  In addition, the said embodiment is an example of suitable implementation of this invention, and various deformation | transformation are possible for this invention, without being limited to this.

It is a figure which shows the structure of the sheet | seat member post-processing apparatus which concerns on suitable embodiment of this invention. It is a figure which shows the structure of the drive system of a conveyance roller and a paper discharge roller. It is a figure which shows the structure of the roller by the side of the drive of a discharge roller pair. It is a figure which shows the structure of the drive system which drives a lever reciprocatingly. It is a figure which shows another structure of the drive system which drives a lever reciprocatingly. It is a figure which shows the structure of the roller by the side of the drive of a discharge roller pair. It is a figure which shows the structure of a sheet alignment part. It is a figure which shows the operation timing of each part from sheet | seat carrying in to alignment. It is a figure which shows the operation timing of each part from sheet | seat carrying in to alignment. It is a figure which shows the sheet | seat alignment operation | movement of a pair of jogger fence. It is a figure which shows the sheet | seat alignment operation | movement of a pair of jogger fence. It is a figure which shows the structure of a paper discharge tray. It is a figure which shows the structure of a paper discharge tray. It is a figure which shows the structure of a paper discharge tray. FIG. 6 is a diagram illustrating an operation of a paper discharge tray. FIG. 6 is a diagram illustrating an operation of a paper discharge tray. It is a figure which shows the structure of the control system in connection with sheet conveyance. It is a figure which shows the structure of the control system in connection with sheet conveyance. It is a figure which shows the structure of the stepping motor test | inspection system which concerns on 1st Embodiment. It is a figure which shows the drive part of a stepping motor. It is a figure which shows the structure of an encoder. It is a figure which shows the flow of operation | movement of the test object apparatus in process inspection mode. It is a figure which shows the flow of operation | movement of a process inspection apparatus. It is a figure which shows the structure of the stepping motor test | inspection system in the case of switching with a switch on a control board between normal use mode and process test | inspection mode. It is a figure which shows an example of a switch. It is a figure which shows the flow of operation | movement of a process inspection apparatus in the case of switching with a signal from the outside using normal use mode and process inspection mode. It is a figure which shows the flow of operation | movement of a process inspection apparatus in the case of setting the electric current value in process inspection mode from the outside. It is a figure which shows the flow of operation | movement of a test object apparatus in the case of setting the electric current value in process inspection mode from the outside. It is a figure which shows the structure of the control system in connection with sheet conveyance in case the electric current value in process test | inspection mode is predetermined by the resistance for electric current setting on a control board. It is a figure which shows the structure of the measurement part of the inspection jig applied to the stepping motor inspection system which concerns on 2nd Embodiment. It is a figure which shows the state which attached the measurement part of the inspection jig to the sheet | seat member post-processing apparatus used as a to-be-inspected machine. It is a figure which expands and shows the attachment part of a sheet | seat member post-processing apparatus and a measurement part. It is a figure which shows schematic structure inside a measurement part. It is a figure which shows simply the connection state of the measurement part, the control part of an inspection jig, and a sheet member post-processing apparatus. It is a figure which shows the state by which the encoder was mounted | worn with the axis | shaft for a test | inspection. It is a figure which shows the external appearance of the control part of an inspection jig. It is a figure which shows the flow of operation | movement from a stepping motor test | inspection start to determination. It is a figure which shows the flow of operation | movement from the stepping motor test | inspection start to determination in the case of mutually exchanging data with the control part and sheet | seat member post-processing apparatus of an inspection jig. It is a figure which shows the stepping motor test | inspection system with which the switch with a some pole was installed in the control board.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet post-processing apparatus 201 Conveyance guide plate 202 Opening / closing guide plate 203 Discharge guide plate 204 Conveyance path 205 Inlet 206 Inlet sensor 207 Conveyor roller pair 208 Discharge roller pair 209 Discharge sensor 210, 216, 218, 220, 307 Pulley 211, 215, 219, 225, 304, 305, 670, 801 Timing belt 212, 224, 406, 407, 661 Stepping motor 213 Swing arm 214 Strike roller 217 Shaft 221 Lever 222 Stopper 223, 315 DC / SOL
226 Cam 226a Cam projection portion 227 Link portion 228, 308 Gear 229 Holder 230 Return roller 301 Paper discharge tray 302, 303 Support member 306 Drive shaft 309 DC motor 310 End fence 311 Sheet pressing member 311a Tip pressing portion 312, 663 Rotating shaft 313 Lever 314 Sheet height sensor 401 Stipple tray 402, 403 Jogger fence 408, 409 Home sensor 410, 411 Reference fence 430 Release claw 450 Binding device 600, 664 Control board 601, 665 CPU
602 bus 603 RAM
604 ROM
605, 606, 700 I / O port 607 Motor driver 608, 610 Serial bus 609 Host device 611 PC
614 Analog output port (DAo)
615 Operational amplifier 616 Control power supply setting input terminal (Vref)
617, 618, 701, 702 Resistance 650 Process inspection device 653, 813 Encoder 654, 814 Pulse count sensor 660 Inspection object 662 Harness 666, 667 Connector 668 Drive pulley 671 Roller 672, 815 Optical axis 680 Switch 703 Transistor 800 Measurement of inspection jig Section 802 First pulley 804 Inspection shaft 805 Roller 806 Pressure plate 807 Connecting rod 808 Load setting section 809 Pulse count section 810 Second pulley 811 Spring 812 Holding plate 818 Inspection start button 819 NG determination lamp 820 OK determination lamp 850 Inspection Jig control unit 851 Jig cable

Claims (22)

  A current control unit capable of switching a plurality of set current values, a control board on which an arithmetic device including a nonvolatile storage unit for storing the control current values is mounted, and the set current value is switched to a current value smaller than normal. A stepping motor drive control device having switching means for setting the own device in an inspection mode and driving the stepping motor at a constant current.   The stepping motor drive control device according to claim 1, wherein the switching unit is a switch provided on the control board.   2. The stepping motor drive control device according to claim 1, wherein the switching unit sets the device to the inspection mode in accordance with a signal input from the outside.   4. The stepping motor drive control device according to claim 1, wherein the set current value in the inspection mode is set according to a signal input from the outside. 5.   4. The stepping motor drive control device according to claim 1, wherein the set current value in the inspection mode is determined by a current setting resistor disposed on the control board. 5.   A sheet member post-processing apparatus comprising the stepping motor drive control device according to claim 1, wherein a plurality of sheet members are aligned using a guide member driven by the stepping motor.   The actual number of rotations of the rotating shaft of the stepping motor is compared with the theoretical number of rotations calculated from the number of driving steps set for the stepping motor when the stepping motor is driven to determine the presence or absence of step-out. Stepping motor inspection device having means. A stepping motor drive control device according to any one of claims 1 to 5,
In the state of the inspection mode, the actual number of rotations of the rotation shaft of the stepping motor, and the theoretical number of rotations calculated from the number of drive steps set by the arithmetic unit to the stepping motor when the stepping motor is driven, A stepping motor inspection system comprising: an inspection device having means for comparing the motor drive control device to determine whether or not there is a step-out in the motor drive control device.   For inspection mode under a certain load, the actual number of rotations of the inspection shaft to which the rotation of the sheet member conveyance roller shaft that is driven by the stepping motor arranged in the inspected device and conveys the sheet member is transmitted. It is determined whether or not the stepping motor has stepped out by measuring the operation and comparing the theoretical rotation speed of the sheet member conveying roller shaft when the inspection mode operation is performed. A stepping motor step-out detection method as a feature.   The stepping motor step-out inspection method according to claim 9, wherein a rotation ratio of the sheet member conveyance roller and the inspection shaft is 1: 1.   The load applied to the inspection shaft is such that the total load applied to the stepping motor is greater than the output torque calculated from the minimum current value required for the stepping motor to operate, and the stepping motor is subjected to the inspection mode. The stepping motor step-out inspection method according to claim 9 or 10, wherein the stepping motor is set to have a value smaller than an output torque calculated from a current value for executing the operation.   12. The stepping motor step-out inspection method according to claim 9, wherein the inspection mode operation is a paper-free free-run operation. A sheet member conveying roller shaft that is driven by a stepping motor disposed in the device to be inspected to convey the sheet member, an inspection shaft to which the rotation of the sheet member conveying roller shaft is transmitted, and the number of rotations of the inspection shaft A stepping motor inspection device having a rotational speed detection means for measuring and a load application means for applying a load to the inspection shaft,
The inspection mode operation is performed in a state where a constant load is applied to the inspection shaft by the load application unit, and the actual rotation number of the stepping motor measured by the rotation number detection unit and the inspection mode operation are performed. A stepping motor drive control device for determining whether or not the stepping motor has stepped out by comparing with a theoretical rotational speed of the sheet member conveying roller shaft in the case of the stepping motor.   14. The stepping motor drive control device according to claim 13, wherein the sheet member conveying roller and the inspection shaft have a rotation ratio of 1: 1.   It has a communication means for transmitting and receiving data to and from the device to be inspected, and the theoretical rotational speed of the sheet member transport roller shaft is input from the device to be inspected via the communication means. The stepping motor drive control device according to claim 13 or 14.   The load applied by the load applying means to the inspection shaft is such that the total load applied to the stepping motor is larger than the output torque calculated from the minimum current value required for the stepping motor to operate. The stepping motor drive control according to any one of claims 13 to 15, wherein the stepping motor drive control is set to be a value smaller than an output torque calculated from a current value for causing the motor to perform the inspection mode operation. apparatus.   17. The stepping motor drive control device according to claim 13, wherein the inspection mode operation is a paper-free free-run operation.   The stepping motor drive control device according to any one of claims 13 to 17, wherein the switching to the inspection mode is performed by a switching unit installed on a control board of the device to be inspected.   19. The stepping motor drive control device according to claim 13, wherein switching to the inspection mode is performed by a signal inside the device.   20. The transmission / reception of data to / from the inspected device and the reception of the switching signal to the inspection mode output by the inspected device are performed via a cable for connection to the image forming apparatus. The stepping motor drive control device according to any one of the above.   A sheet member post-processing device comprising the stepping motor drive control device according to any one of claims 13 to 19.   21. The data transmission / reception to / from the inspected device and the reception of the switching signal to the inspection mode output from the inspected device are performed via a cable for connection to the image forming apparatus. Sheet member post-processing device.

Images