JP2008258539A - Mounting machine, and method for preventing interference when adjusting width of conveyor in mounting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting machine which can prevent interference with obstacles when a conveyor moves to the outward. <P>SOLUTION: The mounting machine mounts components on a substrate. The mounting machine has a pair of conveyors 201, 202 which convey the substrate to a predetermined mounting position, a conveyor moving means 22 which moves one conveyor 201 in inside/outside direction to change an interval between the pair of the conveyors 201, 202, where the inside/outside direction is the direction in which one conveyor contacts with/separates from the other conveyor, an outer obstacle detecting sensor 31 which detects the obstacles interfering the conveyor 201, when one conveyor 201 shifts outwards, and a conveyor outer transfer control means which stops the outward movement of one conveyor 201, when the obstacles are detected by the outer obstacle detecting sensor 31. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mounting machine for mounting electronic components on a substrate and an interference prevention method when adjusting a conveyor width in the mounting machine.

  Conventionally, as a mounting machine that mounts electronic components on a board, after the board is carried to a predetermined mounting position by a pair of conveyors (conveyor rails), the board is supported by a plurality of backup pins and mounted on the board in that state. It is well known that this is done.

  In such a mounting machine, the movable conveyor on one side moves in a direction (inside / outward direction) to be in contact with or separated from the fixed conveyor on the other side so that the interval between the pair of conveyors can be changed according to the size of the board. Yes. Also, the backup pin is usually changed according to the size of the substrate.

  However, when mounting a narrow substrate after mounting a wide substrate, temporarily move the movable conveyor to the inside with the backup pins still aligned with the wide substrate to narrow the width of the pair of conveyors. Attempting to do so may cause the movable conveyor to interfere with the backup pin.

Therefore, as shown in Patent Document 1, an obstacle detection sensor that detects an obstacle (interfering object) is attached inside the movable conveyor, and when the movable conveyor moves inward, the obstacle detection sensor backs up the obstacle. When a pin is detected, a mounting machine has been proposed in which the movement of the movable conveyor is stopped to prevent the conveyor from interfering with the backup pin.
Japanese Patent No. 2919486 (Claims)

  However, in the conventional mounting machine shown in the above-mentioned Patent Document 1, interference can be prevented against obstacles such as backup pins arranged between a pair of conveyors, but the backup pins are set incorrectly on the outside of the movable conveyor. In this state, when the movable conveyor moves outward, the conveyor may interfere with the backup pin.

  This invention is made in view of the said subject, and provides the interference prevention method at the time of conveyor width adjustment in a mounting machine which can prevent that a conveyor interferes with an obstacle when moving outward. With the goal.

  The present invention provides the following means.

[1] A mounting machine for mounting components on a board,
A pair of conveyors for transporting the substrate to a predetermined mounting position;
Conveyor moving means that adjusts the distance between the pair of conveyors by moving the one-side conveyor inward and outward directions when the direction in which the one-side conveyor is moved toward and away from the other-side conveyor
An outer obstacle detection sensor that detects an obstacle that interferes with the conveyor when the one-side conveyor moves outward;
A mounting machine comprising: a conveyor outside movement control means for stopping the outward movement of the one side conveyor when an obstacle is detected by the outside obstacle detection sensor.

[2] When the one-side conveyor moves inward, an inner obstacle detection sensor that detects an obstacle that interferes with the conveyor;
The mounting machine according to claim 1, further comprising: a conveyor inner movement control unit that stops the movement of the one-side conveyor inward when an obstacle is detected by the inner obstacle detection sensor.

[3] A mounting machine for mounting components on a board,
A pair of conveyors for transporting the substrate to a predetermined mounting position;
Conveyor moving means that adjusts the distance between the pair of conveyors by moving the one-side conveyor inward and outward directions when the direction in which the one-side conveyor is moved toward and away from the other-side conveyor
An obstacle detection sensor which is provided on one side conveyor and detects an obstacle;
A sensor moving means for moving the obstacle detection sensor between a position where the outer obstacle on the one-side conveyor can be detected and a position where the inner obstacle can be detected;
When the one-side conveyor moves outward, the sensor moving means moves the obstacle detection sensor to a position where the outer obstacle can be detected, while the one-side conveyor moves inward when the one-side conveyor moves inward. Sensor movement control means for moving the obstacle detection sensor to a position where the obstacle inside can be detected by the means, and
A mounting machine comprising: a conveyor movement control means for stopping the movement of the one-side conveyor in and out when an obstacle is detected by the obstacle detection sensor.

[4] A mounting machine for mounting components on a board,
A pair of conveyors for transporting the substrate to a predetermined mounting position;
Conveyor moving means that adjusts the distance between the pair of conveyors by moving the one-side conveyor inward and outward directions when the direction in which the one-side conveyor is moved toward and away from the other-side conveyor
An obstacle detection sensor provided on one conveyor, having a projector and a light receiver, configured to detect an obstacle by blocking a detection beam projected from the light projector to the light receiver;
An optical path changing means for changing the optical path of the detection beam projected from the light projector and received by the light receiver, and projecting the detection beam to the outside and the inside along the one-side conveyor,
Conveyor movement control means for stopping the movement of the one-side conveyor in and out when the obstacle is detected by the obstacle detection sensor while the one-side conveyor is moving in and out A mounting machine that features.

[5] When a pair of conveyors for transporting a substrate to a predetermined mounting position and a direction in which the one-side conveyor is brought into and out of contact with the other-side conveyor are inward and outward directions, the one-side conveyor is moved inward and outward to make a pair An interference prevention method at the time of adjusting the conveyor width in a mounting machine equipped with a conveyor moving means for adjusting the interval of the conveyor,
When the one-side conveyor moves outward, install an outer obstacle detection sensor that detects obstacles that interfere with the conveyor,
An interference prevention method when adjusting a conveyor width in a mounting machine, wherein when an obstacle is detected by an outer obstacle detection sensor, the outward movement of the one-side conveyor is stopped.

  According to the mounting machine according to the invention [1], when the obstacle is detected by the outer obstacle detection sensor, the outward movement of the one-side conveyor is stopped, so that the conveyor moves outward. It is possible to prevent interference with obstacles.

  According to the mounting machine according to the invention [2], when the obstacle is detected by the inner obstacle detection sensor, the inward movement of the one-side conveyor is stopped, so that the conveyor moves inward. Interference with obstacles can also be prevented.

  According to the mounting machine according to the invention [3], it is possible to prevent the conveyor from interfering with the obstacle while reducing the number of obstacle detection sensors used.

  According to the mounting machine according to the invention [4], the number of obstacle detection sensors can be reduced, and the conveyor can be prevented from interfering with the obstacles while simplifying the structure.

  According to the interference prevention method at the time of adjusting the conveyor width in the mounting machine according to the invention [5], it is possible to prevent the conveyor from interfering with an obstacle when moving outward as in the above case.

<First Embodiment>
FIG. 1 is a plan view showing an example of a mounting machine M1 according to the first embodiment of the present invention. As shown in the figure, the mounting machine M1 includes a conveyor device 20 that is disposed above the base 11 and conveys the substrate W, component supply units 30 provided on both sides of the conveyor device 20, and a conveyor device 20. The head unit 40 is provided above.

  The component supply unit 30 is provided on each of the front side and the rear side with respect to the conveyor device 20. In this embodiment, the component supply unit 30 is configured so that a plurality of tape feeders 31... On each reel of the tape feeder 31, a tape in which electronic components such as an IC, a transistor, and a capacitor are stored at predetermined intervals is wound and set, and the electronic components are picked up by sequentially feeding the tape. These are sequentially supplied to (supply position). In the present invention, a tray feeder configured to supply components from a component supply container such as a pallet can also be used as the component supply means of the component supply unit 30.

  The head unit 40 can move in a region extending between the component supply unit 30 and the mounting position on the printed circuit board W so that the component supplied from the component supply unit 30 can be picked up and mounted on the printed circuit board W. It has become. Specifically, the head unit 40 is supported so as to be movable in the X-axis direction by a head unit support member 42 extending in the X-axis direction (substrate transport direction of the conveyor device 20). The head unit support member 42 is supported at both ends thereof by guide rails 43 and 43 extending in the Y-axis direction (a direction orthogonal to the X-axis in a horizontal plane) so as to be movable in the Y-axis direction. The head unit 40 is driven in the X axis direction by the X axis motor 44 via the ball screw 45, and the head unit support member 42 is driven in the Y axis direction by the Y axis motor 46 via the ball screw 47. To be done.

  In the head unit 40, a plurality of mounting heads 41 for mounting components are arranged side by side in the X-axis direction.

  Each head 41 is driven in the vertical direction (Z-axis direction) by an elevating mechanism using a Z-axis motor as a drive source, and in the rotation direction (R-axis direction) by a rotation drive mechanism using an R-axis motor as a drive source. It is designed to be driven.

  Each head 41 is provided with a suction nozzle (not shown) for sucking and sucking the electronic component A and mounting it on the substrate W.

  The head unit 40 is provided with a substrate imaging camera 13 facing downward. The substrate imaging camera 13 is constituted by a CCD camera or the like, and the substrate imaging camera 13 can recognize the substrate and the like.

  Further, a component imaging camera 12 is provided upward between the conveyor device 20 and the rear-side component supply unit 30. The component imaging camera 12 is configured by a line sensor camera or the like, and the component imaging camera 12 can recognize a component sucked by the head 41 of the head unit 40.

  As shown in FIGS. 2-6, the backup plate 15 in which the backup pin BP for supporting the board | substrate W is set is provided on the base of the mounting machine M1.

  Then, the substrate W is carried into the position (predetermined mounting position) where the backup pin BP is set by the conveyor device 20. Furthermore, after the board | substrate W is carried in and mounted, the board | substrate W is carried out from the mounting position by the conveyor apparatus 20. FIG.

  The conveyor device 20 includes a pair of conveyors (conveyor rails) 201 and 202 disposed along the X-axis direction in the same horizontal plane above the backup plate 15. The one-side conveyor is configured as a movable-side conveyor 201, and the other-side conveyor is configured as a fixed-side conveyor 202.

  Both ends of the movable side conveyor 201 are supported by the movable columns 211, and both ends of the fixed side conveyor 202 are supported by the fixed columns 203.

  The movable column 211 is attached to the base of the mounting machine M1 so as to be movable along the Y-axis direction. Accordingly, the movable conveyor 201 is configured to be movable with the movable support column 211 in the Y-axis direction while maintaining a parallel state with respect to the fixed conveyor 202. As described above, when the movable conveyor 201 moves in the Y-axis direction and approaches or moves away from the fixed conveyor 202, the distance between the pair of conveyors 201 and 202 is changed, and the conveyor width is adjusted. ing.

  In the present embodiment, the direction (Y-axis direction) in which the movable-side conveyor 201 is in contact with and away from the fixed-side conveyor 202 is the inward / outward direction. More specifically, the direction in which the movable side conveyor 201 approaches the fixed side conveyor 202 is defined as the inward direction, and the direction away from the movable side conveyor 201 is defined as the outward direction.

  A conveyor moving means 22 is provided at one end side of the movable conveyor 201. The conveyor moving means 22 includes a ball screw 221 disposed along the Y-axis direction, and a ball screw driving motor 222 such as a servo motor that rotationally drives the ball screw 221.

  The ball screw 221 is attached in a state of being screwed to the support column 211 of the movable conveyor 201. Accordingly, when the ball screw 221 is driven to rotate by driving the ball screw driving motor 222, the movable conveyor 201 moves along the Y-axis direction.

  Sensor mounting brackets 212 are provided on both movable struts 211 of the movable conveyor 201 so as to project from both the inner and outer sides of the movable conveyor 201 (see FIG. 6).

  A projector 3a of the outer obstacle detection sensor 31 is provided at an outer end (front end) of one sensor mounting bracket 212, and an inner obstacle is provided at an inner end (rear end). A projector 3a for the detection sensor 32 is provided. Further, a light receiver 3b of the outer obstacle detection sensor 31 is provided at the outer end of the other sensor mounting bracket 212, and a light receiver 3b of the inner obstacle detection sensor 32 is provided at the inner end. .

  The detection beam (laser light) L projected from the projectors 3a, 3a of both the inner and outer obstacle detection sensors 31, 32 is received by the corresponding light receivers 3b, 3b of the obstacle detection sensors 31, 32. Has been. In this way, the detection beams L of the obstacle detection sensors 31 and 32 are projected along the inside and outside of the movable conveyor 201. Therefore, when an obstacle (interfering object) such as the backup pin BP is mistakenly installed outside when the movable conveyor 201 moves outside, the outside detection beam L is blocked by the backup pin BP. Therefore, the obstacle is detected before the movable conveyor 201 interferes with the obstacle due to the blocking. On the other hand, when the movable side conveyor 201 moves inward, if the backup pin BP is installed on the inner side, the inner detection beam L is blocked by the pin 15, so that the movable side conveyer is cut off. An obstacle is detected before 201 interferes with the obstacle.

  FIG. 7 is a block diagram showing a control system of the mounting machine M1. As shown in the figure, the mounting machine M1 of this embodiment includes a control device (controller) 6 composed of a personal computer or the like, and the control device 6 controls various operations of the mounting machine M1.

  The control device 6 includes an arithmetic processing unit 60, a mounting program storage unit 63, a conveyance system data storage unit 64, a motor control unit 65, an external input / output unit 66 and an image processing unit 67.

  The arithmetic processing unit 60 comprehensively manages various operations of the mounting machine M1.

  The mounting program storage unit 63 stores a mounting program (production program) for mounting each electronic component on the substrate W. This production program includes data relating to the mounting position (coordinates) and orientation of each electronic component based on the circuit pattern of the substrate W, the position (coordinates) of the feeder 31 to which each electronic component is supplied, and the like.

  The transfer system data storage means 64 stores various data related to the transfer of the substrate W on the production line.

  Further, the motor control unit 65 controls the operation of the head 41 and the drive motors of the XYZR axes of the suction nozzle. Further, the motor control unit 65 controls driving of the movable conveyor moving motor 222 and the like of the movable conveyor moving means 22.

  The external input / output unit 66 inputs / outputs various information to / from various sensors provided in the mounting machine M1, a stopper for positioning and stopping the substrate on the conveyor device 20, and the like. The various sensors include the outer and inner obstacle detection sensors 31 and 32 described above.

  The image processing unit 67 processes image data captured by the component photographing camera 12 and the board photographing camera 13.

  The control device 6 is connected to a display unit 62 such as a CRT display or a liquid crystal display for displaying various information. Furthermore, an input unit (not shown) such as a keyboard and a mouse for inputting various information is connected to the control device 6.

  Next, the operation in the mounting machine M1 will be described.

  First, as shown in FIG. 8, the position and number of backup pins BP are adjusted in accordance with the size of the substrate W to be processed (step S1). When the type (size) of the substrate W is the same, it is not necessary to change the setting of the backup pin BP.

  Next, information on the substrate W to be processed is acquired by the control device 6, and the interval between the pair of conveyors 201 and 202 of the conveyor device 20 is adjusted according to the size of the substrate W. The conveyor width adjustment (step S2) will be described in detail later.

  After the conveyor width is adjusted, the substrate W is carried by the conveyor device 20 to a predetermined mounting position, that is, a position where the backup pin BP is installed (step S3).

  Thereafter, the substrate W is supported by the backup pins BP, and the substrate W is fixed by a clamper (not shown).

  In this state, the mounting process is performed (step S4). That is, after the head unit 40 moves to the position of the substrate W and the component is picked up by the head 41, the component is transferred to the base position and mounted on the substrate W.

  When all the predetermined components are mounted on the substrate W in this way, the substrate W is released from the conveyor W after the clamp on the substrate W is released (step S5).

  Next, the conveyor width adjustment process (step S2) will be described in detail. As shown in FIG. 9, the previously processed substrate information and the substrate information to be processed are compared to determine whether or not the substrate size (width) has been changed (step S21).

  If the substrate sizes are the same (NO in step S21), the operation ends without changing the conveyor width.

  When the board size is changed (YES in step S21), the conveyor width is adjusted according to the board size. For example, when the board is changed to a large size (width), the movable conveyor 201 is moved in the direction away from the fixed conveyor 202 (outward) (step S22). When the size (width) is changed to a small substrate, the movable conveyor 201 is moved in a direction (inward) approaching the fixed conveyor 202. Needless to say, the movable conveyor 201 is moved by rotating the ball screw 221 by driving the ball screw driving motor 222 of the conveyor moving means 22 as described above.

  During the movement of the conveyor, the presence or absence of an obstacle is monitored based on information from both the inside and outside obstacle detection sensors 31 and 32 (step S23).

  If there is no obstacle (NO in step S23), the movable conveyor 201 moves inward and outward until it reaches a predetermined position (NO in step S24).

  When the movable conveyor 201 reaches a predetermined position, that is, a position corresponding to the substrate size (YES in step S24), the movement of the movable conveyor 201 is stopped (step S25), and the process ends.

  The determination as to whether or not the movable conveyor 201 has reached a predetermined position is made based on, for example, the amount of rotation of the ball screw drive motor 222 of the conveyor moving means 22. That is, the current position of the movable conveyor 201 is acquired based on the rotation amount of the ball screw drive motor 222, and the current position information is compared with the position information of the movable conveyor 201 corresponding to the board size of the mounting program. When both pieces of position information match, it is determined that the movable conveyor 201 has reached a predetermined position.

  On the other hand, when obstacles are arranged in the movement range of the movable conveyor 201, for example, as shown in FIG. 3A, when changing to a board having a small size (width), in the backup pin adjustment work (see FIG. In step S1), if the operator forgets to remove the backup pin BPx that should be removed due to carelessness, the left backup pin becomes an obstacle BPx. Arranged. In such a case, when the movable conveyor 201 moves inward, the inner obstacle detection sensor 32 detects a backup pin as the obstacle BPx (YES in step S23).

  Further, when changing to a large-sized board (step S1 in FIG. 8), for example, as shown in FIG. 3B, the backup pin BPx temporarily placed outside the movable conveyor 201 as shown in FIG. If the device is left as it is due to carelessness, the left backup pin is placed as an obstacle BPx. In such a case, when the movable conveyor 201 moves outward, a backup pin as an obstacle BPx is detected by the outer obstacle detection sensor 31 (YES in step S23).

  When the obstacle is detected by the obstacle detection sensors 31 and 32 while the movable conveyor 201 is moving in this way (YES in step S23), the movement of the movable conveyor 201 in and out is immediately stopped. (Step S26), an error warning is issued (step S27), and the operator is notified. As an error warning, a display on a monitor, a buzzer sound, a warning light, or the like is used.

  In this embodiment, when the obstacle detection sensor 31, 32 detects the obstacle BPx on the outside and inside, the control device 6 that controls the movable-side conveyor 201 to stop is controlled by the conveyor outside movement control. It functions as a means and a conveyor inner side movement control means.

  As described above, according to the mounting machine M1 of the present embodiment, the obstacle detection sensors 31 and 32 that detect the obstacles on the inner side and the outer side of the movable side conveyor 201 are provided. When the obstacle BPx is detected, the movement of the movable conveyor 201 is stopped. Therefore, when the conveyor width is adjusted, the movable conveyor 201 moves inward as well as inward. Even in the case, if there is an obstacle BPx, the movement of the movable conveyor 201 is immediately stopped. For this reason, it is possible to reliably prevent the movable conveyor 201 from interfering with the obstacle BPx, and the interference collision damages the movable conveyor 201 and the backup pin as the obstacle BPx. Can be reliably prevented.

Second Embodiment
10 and 11 are views schematically showing the main part of a mounting machine M2 according to the second embodiment of the present invention. As shown in both figures, in the mounting machine M2 of the second embodiment, the obstacles on the inner side and the outer side of the movable conveyor 201 are detected by a movable set of obstacle detection sensors 31. This is greatly different from the first embodiment.

  That is, in the mounting machine M2 of the second embodiment, the sensor moving brackets 23 are provided on the sensor mounting brackets 212 provided on the movable support column 211 on both sides of the movable conveyor 201, respectively.

  The sensor moving means 23 is provided on the sensor mounting bracket 212 and arranged along the Y-axis direction (inside / outside direction), and the linear guide 231 extends along the length direction (Y-axis direction). A slider 232 that is slidably mounted and an air cylinder 233 for driving the slider that is provided on the sensor mounting bracket 212 along the Y-axis direction and that has a rod end attached to the slider 232 are provided.

  On the slider 232 of one sensor moving means 23, a projector 3a of the obstacle detection sensor 31 is provided. On the slider 232 of the other sensor moving means 23, a light receiver 3b of the obstacle detection sensor 31 is provided. Is provided.

  When the air cylinders 233 in the sensor moving means 23 on both sides are driven to advance, the slider 232 moves to the outside (front side), and the light projector 3a and the light receiver 3b are arranged outside the movable conveyor 201, and the air cylinder When 233 is driven backward, the slider 232 moves inward (rear side), and the light projector 3 a and the light receiver 3 b are arranged inside the movable conveyor 201.

  Further, in the state where the projector 3a and the light receiver 3b of the obstacle detection sensor 31 are arranged outside the movable conveyor 201, the detection beam L directed from the projector 3a to the light receiver 3b is projected along the outside of the movable conveyor 201. The Therefore, in this state, the outer obstacle can be detected when the movable conveyor 201 moves outward. When the light receiver 3 a and the light receiver 3 b of the obstacle detection sensor 31 are arranged inside the movable conveyor 201, the detection beam L directed from the light projector 3 a to the light receiver 3 b is projected along the inner side of the movable conveyor 201. Is done. Therefore, in this state, when the movable conveyor 201 moves inward, an inner obstacle can be detected.

  In the mounting machine M2 of the second embodiment, other configurations are substantially the same as those of the mounting machine M1 of the first embodiment. Therefore, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted. To do.

  In the mounting machine M2 of the second embodiment, when the substrate size is changed and the movable conveyor 201 is moved inward at the time of adjusting the conveyor width, for example, the air cylinder 233 of the sensor moving unit 23 is moved backward in advance. Driven. As a result, the obstacle detection sensor 31 is arranged inside the movable conveyor 201, so that an obstacle inside the movable conveyor 201 can be detected. For this reason, as shown in FIG. 10A, even if an obstacle BPx such as a backup pin is mistakenly arranged inside the movable conveyor 201, the obstacle BPx is detected, and the movable conveyor 201 Inward movement is stopped. Therefore, it is possible to reliably prevent the movable conveyor 201 from colliding with the obstacle BPx.

  When moving the movable conveyor 201 to the outside, the air cylinder 233 of the sensor moving means 23 is advanced to advance. As a result, the obstacle detection sensor 31 is disposed outside the movable conveyor 201, so that an obstacle outside the movable conveyor 201 can be detected. For this reason, as shown in FIG. 10B, even if an obstacle BPx such as a backup pin is mistakenly arranged outside the movable conveyor 201, the obstacle BPx is detected and the movable conveyor 201 Outward movement is stopped. Therefore, it is possible to reliably prevent the movable conveyor 201 from colliding with the obstacle BPx.

  In the present embodiment, when the movable conveyor 201 moves outside and inside, the control device 6 that controls the obstacle detection sensor 31 to move outside and inside according to the moving direction is It functions as a movement control means.

  In the present embodiment, the control device 6 that controls the movable conveyor 201 to stop when the obstacle detection sensor 31 detects the obstacle BPx outside and inside functions as a conveyor movement control means. To do.

  As described above, even in the mounting machine M2 of the present embodiment, the movable conveyor 201 has a backup pin or the like that is misplaced even if the movable conveyor 201 moves in either the inner or outer direction. It is possible to reliably prevent interference with the obstacle BPx.

  Further, in the mounting machine M2 of the second embodiment, the pair of obstacle detection sensors 31 are moved outside and inside the movable conveyor 201 to detect both the inside and outside obstacles BPx. The number of the expensive obstacle detection sensors 31 used is one set, and the cost can be reduced.

  In the second embodiment, the configuration of the sensor moving unit 23 is not particularly limited, and the obstacle detection sensor 31 may be moved using a servo motor or the like.

<Third Embodiment>
FIG. 12 is a plan view schematically showing the main part of a mounting machine M3 according to the third embodiment of the present invention. As shown in the figure, in the mounting machine M3 of the third embodiment, the optical path changing means is used to project the detection beam L of the obstacle detection sensor 31 to the required position. This is very different from the embodiment.

  That is, in the mounting machine M3 of the second embodiment, the projector 3a of the obstacle detection sensor 31 is provided outside one end of the movable conveyor 201, and the obstacle is disposed inside the other end of the movable conveyor 201. A light receiver 3b of the object detection sensor 31 is provided.

  Further, a first light reflection plate 241 as an optical path changing unit is disposed outside the other end of the movable conveyor 201, and a second light reflection as an optical path changing unit is arranged inside the one end of the movable conveyor 201. A plate 242 is disposed.

  The first light reflecting plate 241 is set so as to reflect the detection beam L projected from the projector 3a and direct it toward the second light reflecting plate. The second light reflecting plate 242 is set so that the detection beam L projected (reflected) from the first light reflecting plate 241 is further reflected and directed to the light receiver 3b.

  Therefore, since the detection beam L directed from the projector 3a toward the first light reflection plate 241 is projected along the outside of the movable conveyor 201, the outer obstacle is detected when the movable conveyor 201 moves outward. Can do. Further, since the detection beam L directed from the second light reflecting plate 242 toward the light receiver 3b is projected along the inside of the movable conveyor 201, an inner obstacle is detected when the movable conveyor 201 moves inward. be able to.

  In the mounting machine M3 of the third embodiment, other configurations are substantially the same as those of the mounting machines M1 and M2 of the above-described embodiment. .

  In the mounting machine M3 of the third embodiment, similarly to the above, even if the movable conveyor 201 moves in either the inner or outer direction, an obstacle BPx such as a backup pin that is mistakenly arranged is detected. If it exists, it can prevent reliably that the movable conveyor 201 is stopped immediately and interferes with the obstruction BPx.

  In the present embodiment, the control device 6 that controls the movable conveyor 201 to stop when the obstacle detection sensor 31 detects the obstacle BPx outside and inside functions as a conveyor movement control means. To do.

  Further, in the mounting machine M3 of the third embodiment, both the internal and external obstacles BPx are detected by the pair of obstacle detection sensors 31 using the light reflecting plates 241 and 242. Therefore, the obstacle detection sensor Only one set of 31 may be used, and a complicated mechanism such as the sensor moving means 23 of the second embodiment is not required. Therefore, the structure can be simplified, the apparatus can be reduced in size and weight, and the cost can be reduced.

  Further, unlike the projector 3a and the light receiver 3b that are moved with respect to the movable conveyor 201, the position of the projector 3a and the receiver 3b is fixed with respect to the movable conveyor 201, so that the optical axis can be effectively prevented from shifting. , Detection accuracy can be improved.

  Note that when the optical path changing means is used as in the third embodiment, the optical path of the detection beam L is not limited to the above.

  For example, as shown in FIG. 13, the projector 3 a and the light receiver 3 b of the obstacle detection sensor 31 are arranged on the outer side and the inner side of the movable side conveyor 201, and on the outer side and the inner side of the movable side conveyor 201, First and second light reflectors 241 and 242 as optical path changing means are arranged, and the detection beam L projected from the projector 3a is received by the light receiver 3b via the first and second light reflectors 241 and 242. You may make it let it.

It is a top view which shows the mounting machine concerning 1st Embodiment of this invention. It is a perspective view which shows typically the principal part of the mounting machine of 1st Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows the principal part of the mounting machine of 1st Embodiment typically, Comprising: The figure (a) is a top view in the state which the movable side conveyor is moving inside, The figure (b) is a movable conveyor. It is a top view in the state where has moved outside. It is a front view which shows typically the principal part of the mounting machine of 1st Embodiment. It is a side view which shows typically the principal part of the mounting machine of 1st Embodiment. It is an expansion perspective view which shows typically the floodlight periphery in the mounting machine of a 1st embodiment. It is a block diagram which shows the control system of the mounting machine of 1st Embodiment. It is a flowchart for demonstrating the whole operation | movement in the mounting machine of 1st Embodiment. It is a flowchart for demonstrating the conveyor width adjustment operation | movement in the mounting machine of 1st Embodiment. It is a top view which shows typically the principal part of the mounting machine concerning 2nd Embodiment of this invention, Comprising: The same figure (a) is a top view in the state where the movable side conveyor is moving inside, FIG. ) Is a plan view of a state in which the movable conveyor is moving outward. FIG. 7 is an enlarged perspective view schematically showing the periphery of a sensor moving unit in the mounting machine of the second embodiment, where FIG. (A) is a perspective view of a state where the sensor is moved inward, and (b) is a diagram of the sensor. It is a perspective view of the state moved to the outside. It is a top view which shows typically the principal part of the mounting machine concerning 3rd Embodiment of this invention. It is a top view which shows typically the principal part of the mounting machine concerning the modification of 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mounting machine 22 Conveyor moving means 23 Sensor moving means 31, 32 Obstacle detection sensor 201 Movable side conveyor (one side conveyor)
202 Fixed-side conveyors 241 and 242 Light reflectors (optical path changing means)
L Detection beams M1 to M3 Mounting machine W Substrate BPx Obstacle (backup pin)

Claims (5)

A mounting machine for mounting components on a board,
A pair of conveyors for transporting the substrate to a predetermined mounting position;
Conveyor moving means that adjusts the distance between the pair of conveyors by moving the one-side conveyor inward and outward directions when the direction in which the one-side conveyor is moved toward and away from the other-side conveyor
An outer obstacle detection sensor that detects an obstacle that interferes with the conveyor when the one-side conveyor moves outward;
A mounting machine comprising: a conveyor outside movement control means for stopping the outward movement of the one side conveyor when an obstacle is detected by the outside obstacle detection sensor. An inner obstacle detection sensor that detects an obstacle that interferes with the conveyor when the one conveyor moves inward;
The mounting machine according to claim 1, further comprising: a conveyor inner movement control unit that stops the movement of the one-side conveyor inward when an obstacle is detected by the inner obstacle detection sensor. A mounting machine for mounting components on a board,
A pair of conveyors for transporting the substrate to a predetermined mounting position;
Conveyor moving means that adjusts the distance between the pair of conveyors by moving the one-side conveyor inward and outward directions when the direction in which the one-side conveyor is moved toward and away from the other-side conveyor
An obstacle detection sensor which is provided on one side conveyor and detects an obstacle;
A sensor moving means for moving the obstacle detection sensor between a position where the outer obstacle on the one-side conveyor can be detected and a position where the inner obstacle can be detected;
When the one-side conveyor moves outward, the sensor moving means moves the obstacle detection sensor to a position where the outer obstacle can be detected, while the one-side conveyor moves inward when the one-side conveyor moves inward. Sensor movement control means for moving the obstacle detection sensor to a position where the obstacle inside can be detected by the means, and
A mounting machine comprising: a conveyor movement control means for stopping the movement of the one-side conveyor in and out when an obstacle is detected by the obstacle detection sensor. A mounting machine for mounting components on a board,
A pair of conveyors for transporting the substrate to a predetermined mounting position;
Conveyor moving means that adjusts the distance between the pair of conveyors by moving the one-side conveyor inward and outward directions when the direction in which the one-side conveyor is moved toward and away from the other-side conveyor
An obstacle detection sensor provided on one conveyor, having a projector and a light receiver, configured to detect an obstacle by blocking a detection beam projected from the light projector to the light receiver;
An optical path changing means for changing the optical path of the detection beam projected from the light projector and received by the light receiver, and projecting the detection beam to the outside and the inside along the one-side conveyor,
Conveyor movement control means for stopping the movement of the one-side conveyor in and out when the obstacle is detected by the obstacle detection sensor while the one-side conveyor is moving in and out A mounting machine that features. The distance between the pair of conveyors by moving the one-side conveyor inward and outward when the direction in which the one-side conveyor is brought into and out of contact with the other-side conveyor is defined as the pair of conveyors that convey the substrate to a predetermined mounting position. An interference prevention method at the time of adjusting the conveyor width in a mounting machine equipped with a conveyor moving means for adjusting
When the one-side conveyor moves outward, install an outer obstacle detection sensor that detects obstacles that interfere with the conveyor,
An interference prevention method when adjusting a conveyor width in a mounting machine, wherein when an obstacle is detected by an outer obstacle detection sensor, the outward movement of the one-side conveyor is stopped.

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