JP2007015798A - Conveyor system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accelerate and decelerate drive of a conveyor unit according to a conveyance state in another conveyor unit on an upstream side in a conveyance direction and enable high-speed conveyance. <P>SOLUTION: A control circuit means 21N1, 21N2 for controlling a motor 18 driving a conveyor has a speed data memory 80, a downstream side load presence memory 81 and a computation control unit 83. The speed data memory 80 stores a plurality of speed data. The downstream side load presence memory 81 stores the number of the speed data stored in the speed data memory 80 by successively adding a count number one by one to an upstream conveyor unit 1 from the conveyor unit 1 at a target position for conveyance to the conveyor unit 1 where a carried work exists. The computation control unit 83 reads out speed stored in the speed data memory 80 with respect to the count number stored in the downstream side load presence memory 81 and drives the motor 18. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a conveyor device, and more particularly to a control circuit means for a conveyor.

Conventionally, as a suitable roller conveyor device in a clean room of a delicate transport work such as a silicon wafer or a magnetic disk, for example, Patent Document 1 is cited. This structure will be described with reference to FIGS.
JP 2001-287819 A

  When forming the conveyance path, the necessary number of roller conveyor units 1 shown in FIG. 3 are connected in series. As shown in FIGS. 3 and 4, the holding plates 2 and 3 arranged to face each other are connected by a connecting rod 4. Inside one holding plate 2, five idle rollers 5A, 5B, 5C, 5D, and 5E are arranged in a row, and the idle rollers 5A to 5E are idle roller shafts 6 fixed to the holding plate 2, respectively. Is supported rotatably.

  Inside the other holding plate 3, five drive rollers 7A, 7B, 7C, 7D, and 7E are arranged in a row so as to face the idle rollers 5A, 5B, 5C, 5D, and 5E. Each drive roller shaft 8 of 7E is rotatably supported on the holding plate 3 via a bearing 9. Drive pulleys 10A, 10B, 10C, 10D, and 10E are fixed to the drive roller shafts 8, respectively. A belt 11 is hung on the drive pulleys 10A and 10E.

  A tension pulley 15 is disposed between the drive pulleys 10B and 10C so as to press the belt 11 against the drive pulleys 10B and 10C, and the tension pulley 15 is rotatably supported on a tension pulley shaft 16 fixed to the holding plate 3. Has been. A motor pulley 17 is disposed between the drive pulleys 10C and 10D so as to press the belt 11 against the drive pulleys 10C and 10D, and the motor pulley 17 is fixed to an output shaft of a motor 18 fixed to the holding plate 3.

  Therefore, the belt 11 hung on the drive pulleys 10A and 10E on both sides is pressed against the drive pulleys 10B, 10C, and 10D other than the drive pulleys 10A and 10E by the tension pulley 15 and the motor pulley 17. Therefore, when the motor 18 is driven and the motor pulley 17 rotates, all the drive pulleys 10A to 10E rotate in the same direction via the belt 11, and the drive rollers 7A to 7E also rotate in the same direction. Thereby, the conveyance workpiece | work mounted on idle roller 5A-5E and drive roller 7A-7E is conveyed.

  A work detection sensor 20 disposed above the drive pulleys 10 </ b> A and 10 </ b> E is fixed to the holding plate 3, and a detection window (not shown) is provided at a portion of the holding plate 3 corresponding to the work detection sensor 20. It has been.

  A control circuit means 21 is fixed to the holding plate 3. As shown in FIG. 4, the control circuit means 21 has a control board 22 fixed to the holding plate 3, and the control board 22 includes an arithmetic control unit 23 made of a semiconductor device, an acceleration / deceleration / speed setting switch 24, A crystal resonator 25 and a motor driver 26 are mounted.

  The acceleration / deceleration / speed setting switch 24 is composed of a dip switch having five switches. 3, NO. 4, NO. 5 is a setting of the conveyance speed, switch number NO. 1, NO. 2 is the acceleration / deceleration time setting. Switch number NO. 3, NO. 4, NO. With the combination of 5 OFF and ON, 8 transport speeds can be obtained. Switch number NO. 1, NO. With the combination of OFF and ON of 2, acceleration / deceleration time can be obtained with respect to the above-described eight conveyance speeds.

  The calculation control unit 23 adds a detection signal when the workpiece detection sensor 20 of the roller conveyor unit 1 detects a conveyed workpiece and a signal 30 from the control circuit means 21 of the roller conveyor unit 1 disposed adjacent thereto. Recognizes the setting of the deceleration / speed setting switch 24 and outputs a rotation command 31 to the motor driver 26. At the same time, a signal 33 is generated to cause the crystal unit 25 to generate a pulse 32 according to the speed setting. The motor driver 26 recognizes the rotation command 31 from the arithmetic control unit 23 and the number of pulses 32 from the crystal unit 25 and outputs the number to the motor 18.

  In the prior art described above, the acceleration / deceleration time and the conveyance speed of the conveyance work of each roller conveyor unit can be set by a deceleration / speed setting switch provided on the control board of the control circuit means. That is, since the roller conveyor unit conveys the conveyed workpiece with a preset acceleration / deceleration time and conveyance speed, the conveyance speed cannot be increased.

  The subject of this invention is providing the conveyor apparatus which can accelerate and decelerate the drive of a conveyor unit according to the conveyance condition in the conveyor unit of the upstream of a conveyance direction, and can convey at high speed.

  Claim 1 of the present invention for solving the above-mentioned problems is a motor that drives a conveyor, a workpiece detection sensor that detects a conveyed workpiece and outputs a detection signal in response thereto, and a detection signal from the workpiece detection sensor. Accordingly, in a conveyor apparatus in which a plurality of conveyor units having control circuit means for controlling the motor are arranged in series, the control circuit means accelerates to the vicinity of the conveyor unit up to the conveying position and conveys the workpiece to be conveyed. The apparatus is characterized in that it is configured to be accelerated and decelerated across a plurality of control circuit means so as to decelerate and convey when approaching the conveyor unit at the conveying position.

  A second aspect of the present invention for solving the above-mentioned problems is that, in the first aspect, the control circuit means includes a speed data memory, a downstream load memory, and an arithmetic control unit. A plurality of speed data is stored, and the downstream side stock memory determines the transport speed of the conveyor, and increments the count number one by one to the conveyor unit upstream from the conveyor unit at the target transport position. The number of speed data stored in the speed data memory is stored as the maximum count number up to the conveyor unit where the workpiece is present, and the arithmetic control unit is configured to count the count number stored in the downstream stock memory. The motor is driven by reading the speed stored in the speed data memory.

  Claim 3 of the present invention for solving the above-mentioned problem is that in claim 1, the control circuit means includes a speed data memory, a downstream load memory, an upstream load memory, and an arithmetic control unit. The speed data memory stores a plurality of speed data, and the downstream load memory determines the conveyor transport speed, and counts the count number to the conveyor unit upstream from the conveyor unit at the target transport position. The number of speed data stored in the speed data memory is stored as the maximum count up to the conveyor unit in which the work piece is present by adding one by one, and the upstream stock memory is simultaneously driven at the same speed. Determines the number of conveyor units, and increments the count one by one to the conveyor unit downstream from the conveyor unit that has the workpiece to be transferred. A certain count number is stored as the maximum count number up to the conveyor unit at the target position to be conveyed, and the calculation control unit stores the count number stored in the downstream stock memory in the speed data memory. The speed is read and the motor is driven, and at the same time, the conveyor unit having the maximum count number in the upstream-side in-stock memory is simultaneously driven at the same speed.

  According to the first and second aspects, since it is configured to be accelerated and decelerated across a plurality of control circuit means, the drive of the conveyor unit is accelerated according to the conveyance status in the conveyor unit downstream in the conveyance direction. It is possible to decelerate, high speed conveyance is possible, and productivity can be improved.

  An embodiment of the conveyor apparatus of the present invention will be described with reference to FIGS. 1 and 2 with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same or equivalent member as FIG.3 and FIG.4. The present embodiment is different from the conventional roller conveyor apparatus shown in FIGS. 3 and 4 in the configuration of the control circuit means 21. FIG. 2 shows a roller conveyor unit on the downstream side continuous with FIG. 1 and 2 show eight roller conveyor units 1 (1CV1, 1CV2,... 1CV8). The roller conveyor units 1CV1 to 1CV8 are in the flow direction of the transport work, and the side on which the transport work flows is downstream. Call it. The control circuit means 21 (21N1, 21N2,... 21N8) has a control board 22 (22N1, 22N2,... 22N8), and the motor 18 is driven on the control board 22 (22N1, 22N2,... 22N8). The motor driver 26, the speed data memory 80, the downstream-side cargo memory 81, the upstream-side cargo memory 82, and the calculation control unit 83 are mounted.

  The speed data memory 80 stores a plurality of speed data for driving the roller conveyor unit 1 (1CV1, 1CV2,... 1CV8). For example, four speeds are stored as 0.15 m / sec for the first speed, 0.75 m / sec for the second speed, 1.5 m / sec for the third speed, and 2.0 m / sec for the fourth speed. ing. Here, in the case of acceleration, the acceleration is sequentially performed as second speed → third speed → fourth speed. In the case of deceleration, the gears are sequentially decelerated as fourth speed → third speed → second speed → first speed.

  The downstream in-stock memory 81 determines the speed of the roller conveyor unit 1, and increments the count number one by one to the roller conveyor unit 1 that is sequentially upstream from the roller conveyor unit 1 at the destination position to be conveyed. Up to the existing roller conveyor unit 1, the number of speed data stored in the speed data memory 80 is stored as the maximum count number. That is, in the present embodiment, the maximum count number is stored up to “4”. For example, when the transfer work is stopped in the roller conveyor unit 1CV8 and the transfer work existing in the roller conveyor unit 1CV1 is transferred to the roller conveyor unit 1CV7, the downstream load memory 81 counts as shown in Table 1. Is memorized. That is, the count “0” is stored in the downstream stock memory 81 of the control circuit means 21N7, the count “1” is recorded in the downstream stock memory 81 of the control circuit means 21N6, and the downstream stock memory 81 of the control circuit means 21N5 is stored. Is stored in the downstream stock memory 81 downstream of the control circuit means 21N4, and the count “4” is stored in the downstream stock memory 81 downstream of the control circuit means 21N3. This count number is stored by the output from the arithmetic control unit 83 immediately before the downstream.

  The upstream side stocking memory 82 determines the number of roller conveyor units 1 that are simultaneously driven at the same speed in order to increase the efficiency of conveyance, and the roller conveyor unit sequentially downstream from the roller conveyor unit 1 having the conveyance work to be conveyed. A certain count number is stored as the maximum count number up to the roller conveyor unit 1 at the target position where the count number is added to the unit 1 one by one. That is, in the present embodiment, the maximum count number is stored as “3”. For example, as described above, when there is a transport work in the roller conveyor unit 1CV1, and this transport work is transported to the roller conveyor unit 1CV7, the count is stored in the upstream stock memory 82 as shown in Table 1. The That is, the count “0” is stored in the upstream inventory memory 82 of the control circuit 21N1, the count “0” is stored in the upstream inventory memory 82 of the control circuit 21N2, and the upstream inventory memory 82 of the control circuit 21N3 is stored. "1", the count "2" is stored in the upstream stock memory 82 of the control circuit means 21N4, and the count "3" is stored in the upstream stock memory 82 upstream of the control circuit means 21N5. This count number is stored by the output from the immediately preceding arithmetic control unit 83 upstream.

  The calculation control unit 83 uses the first speed and the second speed stored in the speed data memory 80 for the counts “1”, “2”, “3”, and “4” stored in the downstream stock memory 81. The third speed and the fourth speed are read and the motor 18 is driven via the motor driver 26. In addition, when the count in the upstream-side inventory memory 82 is “2” or less, the arithmetic control unit 83 outputs a command signal to the motor driver 26 so as to simultaneously drive the roller conveyor unit 1 immediately downstream thereof at the same speed. In the case where the count in the upstream stock memory 82 is the maximum “3”, the command signal for driving the immediately downstream roller conveyor unit 1 is not output. Therefore, in the case of the present embodiment, four roller conveyor units 1CV1 in which a workpiece is present and four roller conveyor units 1 downstream from the roller conveyor unit 1 are simultaneously driven at the same speed. The workpieces present in the roller conveyor unit 1 are detected by the upstream and downstream workpiece detection sensors 20, 20 and input to the calculation control unit 83.

  Next, the operation will be described. Now, as an example, a case will be described in which a transport work exists in the roller conveyor unit 1CV1 as described above, and this transport work is transported to the roller conveyor unit 1CV8. In this case, before driving, the counts are stored in the downstream stock memory 81 and the upstream stock memory 82 of the control circuit means 21N1 to 21N8 as shown in Table 1. As described above, in the case of acceleration, the second speed → the third speed → the fourth speed is accelerated, and in the case of the deceleration, the speed is decreased as the fourth speed → the third speed → the second speed → the first speed.

  Therefore, when an instruction to convey the work to be conveyed in the roller conveyor unit 1CV1 of the control circuit means 21N1 is input, the count of the upstream stock memory 82 of the control circuit means 21N1, 21N2, 21N3, 21N4 is “2” or less. In addition, since the count of the upstream stock memory 82 of the control circuit means 21N5 is “3”, the four roller conveyor units 1CV1 to 1CV5 of the control circuit means 21N1 to 21N5 are simultaneously driven at the same speed. That is, in this case, since it is acceleration, the roller conveyor units 1CV1 to 1CV4 of the control circuit means 21N1 to 21N4 are driven at the second speed, and the transfer work of the roller conveyor unit 1CV1 is transferred to the roller conveyor unit 1CV2. Therefore, the roller conveyor unit 1CV1 of the control circuit means 21N1 does not need to be accelerated to the third speed.

  When the conveyed work is conveyed to the roller conveyor unit 1CV2, the count of the upstream in-memory memory 82 of the control circuit means 21N2 is “0”, the count of the control circuit means 21N3 is “0”, and the count of the control circuit means 21N4 is “ 1 ”, the count of the control circuit means 21N5 is“ 2 ”, and the count of the control circuit means 21N6 is“ 3 ”. Accordingly, the roller conveyor units 1CV2 to 1CV5 of the control circuit means 21N2 to 21N5 are simultaneously driven at the same speed, and the roller conveyor unit 1CV6 starts driving at the second speed. In this way, the four roller conveyor units 1 always having the conveying work and the downstream roller conveyor unit 1 are simultaneously driven, and the roller conveyor unit 1 having the conveying work and the immediately preceding roller conveyor unit 1 are driven at the same speed. Is done.

  The roller conveyor units 1CV2 to 1CV5 of the control circuit means 21N2 to 21N5 are accelerated to the third speed, and the conveyed work is conveyed to the roller conveyor unit 1CV3 by the roller conveyor unit 1CV2 of the control circuit means 21N2. Therefore, the roller conveyor unit 1CV2 does not need to be accelerated to the fourth speed. Hereinafter, the transfer work is sequentially transferred by the above-described operation. That is, when the workpiece is conveyed to the roller conveyor unit 1CV3, the roller conveyor units 1CV3 to 1CV5 of the control circuit means 21N3 to 21N5 are simultaneously driven at the fourth speed, and the workpiece is transferred to the roller conveyor unit 1CV4 of the control circuit means 21N4. Be transported.

  When the conveyed work is conveyed to the roller conveyor unit 1CV4, the roller conveyor units 1CV4 to 1CV6 of the control circuit means 21N4 to 21N6 are simultaneously driven at the third speed, and the conveyed work is conveyed to the roller conveyor unit 1CV5 of the control circuit means 21N5. The Since the roller conveyor unit 1CV5 is the second speed as shown in Table 1, when the workpiece is conveyed to the roller conveyor unit 1CV5, 1CV5 to 1CV7 of the control circuit means 21N5 to 21N7 are simultaneously driven at the second speed, It is conveyed to the roller conveyor unit 1CV6 of the control circuit means 21N6. Since the roller conveyor unit 1CV6 is the first speed according to Table 1, when the workpiece is conveyed to the roller conveyor unit 1CV6, 1CV6 and 1CV7 of the control circuit means 21N6 and 21N7 are simultaneously driven at the first speed, It is conveyed to the roller conveyor unit 1CV7 of the control circuit means 21N7.

  When the conveyed workpiece is conveyed to the roller conveyor unit 1CV7 and the upstream sensor 20 of the roller conveyor unit 1CV7 detects the conveyed workpiece, the roller conveyor unit 1CV7 of the control circuit means 21N7 is stopped. Thereby, the conveyance work on roller conveyor unit 1CV1 is conveyed to roller conveyor unit 1CV7.

  In this way, acceleration and deceleration are performed over a plurality of control circuit means 21 (21N1, 21N2, 21N3...). In other words, it accelerates to the vicinity of the roller conveyor unit 1 up to the transporting position and transports the transported work, and when it approaches the roller conveyor unit 1 at the transporting position, it decelerates and transports the transported work to the target position at high speed. Can improve productivity.

  The roller conveyor unit 1 shown in FIG. 3 is independent for each of the driving rollers 7A to 7E in which the holding plates 2 and 3 are driven by a single motor 18, and the idle rollers 5A to 5E corresponding to the driving rollers 7A to 7E. The case where it is provided is shown. However, the holding plates 2 and 3 are formed long, and a plurality of blocks each including drive rollers 7A to 7E driven by a single motor 18 and idle rollers 5A to 5E corresponding to the drive rollers 7A to 7E are provided. May be. Further, one of the idle rollers 5A to 5E and the corresponding drive rollers 7A to 7E are coupled by a connecting shaft, and a belt is hung on the idle rollers 5A to 5E in the same manner as the drive rollers 7A to 7E. The idle rollers 5A to 5E are driven rollers. You may make it drive in synchronization with 7A-7E.

  Moreover, although this Embodiment demonstrated the case where it applied to the roller conveyor unit 1 shown in patent document 1, the form of a conveyor unit is not limited. For example, the present invention can be applied to a belt conveyor unit that transports a workpiece by a belt.

It is a block diagram which shows one Embodiment of the control circuit means used for the conveyor apparatus of this invention. It is a block diagram which shows one Embodiment of the control circuit means of the downstream of FIG. An example of the conventional roller conveyor unit is shown, (a) is a top view shown with a partial cross section, (b) is a front view. It is the AA sectional view of Drawing 3 (a). It is a block diagram of the conventional control circuit means.

Explanation of symbols

1 (1CV1, 1CV2... 1CV8) Roller conveyor units 5A to 5E Idle rollers 7A to 7E Drive roller 11 Belt 18 Motor 20 Sensor 21 (21N1, 21N2, 21N3...) Control circuit means 22 (22N1, 22N2, 22N3) ...) Control board 80 Speed data memory 81 Downstream side load memory 82 Upstream side load memory 83 Operation control unit

Claims (3)

  A conveyor unit having a motor for driving a conveyor, a workpiece detection sensor for detecting a conveyed workpiece and outputting a detection signal in response thereto, and a control circuit means for controlling the motor in response to the detection signal from the workpiece detection sensor In the conveyer apparatus in which a plurality of sheets are arranged in series, the control circuit means accelerates to the vicinity of the conveyer unit up to the conveyance position and conveys the conveyed work, and decelerates and conveys when approaching the conveyer unit at the conveyance position. Thus, the conveyor device is configured to be accelerated and decelerated over a plurality of control circuit means.   The control circuit means includes a speed data memory, a downstream load memory, and a calculation control unit. The speed data memory stores a plurality of speed data, and the downstream load memory is used to convey a conveyor. The number of speed data stored in the speed data memory to determine the speed, and increment the count number one by one to the conveyor unit upstream from the conveyor unit at the target position to be conveyed to the conveyor unit where the workpiece is present. Is stored as the maximum count number, and the arithmetic control unit is configured to read the speed stored in the speed data memory with respect to the count number stored in the downstream stock memory and drive the motor. The conveyor apparatus according to claim 1.   The control circuit means includes a speed data memory, a downstream load memory, an upstream load memory, and a calculation control unit, and the speed data memory stores a plurality of speed data, and the downstream load memory The memory determines the conveying speed of the conveyor. The count is incremented by one to the conveyor unit upstream from the conveyor unit at the target position to be conveyed and stored in the speed data memory up to the conveyor unit where the workpiece is present. The number of recorded speed data is stored as the maximum count number, and the upstream load memory determines the number of conveyor units that are driven at the same speed at the same time. A certain number of counts up to the conveyor unit at the target position where the count is added to the conveyor unit one by one. It is stored as the maximum count number, and the arithmetic control unit reads the speed stored in the speed data memory with respect to the count number stored in the downstream side stock memory and drives the motor, and at the same time, the upstream side stock memory 2. The conveyor apparatus according to claim 1, wherein the conveyor units having the maximum count number are simultaneously driven at the same speed.

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