JP4739585B2 - Safety management method and safety system for processing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a safety management method and a safety system for improving the safety of a processing apparatus, and more particularly to a technique for ensuring safety during maintenance work.
[0002]
[Prior art]
In a processing apparatus such as an electronic component mounting apparatus having a conventional servo motor positioning control means, a function for forcibly releasing the safety stop function for each drive unit of the processing apparatus for maintenance work in order to maintain the processing apparatus. Is required. For this reason, the function which cancels | releases a safe stop uniformly is implement | achieved with respect to all the operation modes with which the processing apparatus was equipped, such as the automatic mode, semi-automatic mode, and manual mode.
Here, the automatic mode will be described by taking, for example, an electronic component mounting apparatus as an example. The automatic mode is started by pressing a start switch of the mounting apparatus, and the electronic component is picked up and mounted on the circuit board based on the data setting on the mounting apparatus side. This mode automatically performs a series of machine operations.
The semi-automatic mode is a mode in which the above-mentioned automatic mode machine operation is performed in a pseudo manner without actually picking up electronic components. The manual mode is a mode in which the operation of individual devices such as motors, cylinders, valves, and sensors is confirmed.・ It is a mode to operate for adjustment.
[0003]
[Problems to be solved by the invention]
In the configuration of the processing apparatus as described above, the use conditions of the processing apparatus become complicated due to diversification and sophistication of software processing contents, speeding up and complication of machine operation, etc. Are also diversifying. In particular, when the processing device controls a plurality of moving bodies / drive devices, a safety stop function is provided to restrict the operation of each moving body / drive device for the maintenance of the device and the safety of the worker. At the time of material replenishment or maintenance work for the apparatus, this safety stop function may be forcibly released because it hinders work.
[0004]
However, the forcible release of the safety stop function is performed uniformly for all of the automatic mode, semi-automatic mode, and manual mode described above. Since it will be in the state which can operate | move also about other site | parts, a possibility that an operator may operate accidentally or carelessly arises. The work contents are clearly described by means such as being described in the instruction manual of the device or displaying a work message on the monitor screen of the device, etc. There was a concern that safety could not be secured sufficiently.
Also, during maintenance work, the safety stop function can be secured if the safety stop function is disabled only for the operation limited in the manual mode. Rather, the safety stop function is not disabled in the automatic mode and the semi-automatic mode. The realization of has been demanded.
[0005]
The present invention has been made in view of such a conventional situation, and for a processing apparatus that drives and controls a plurality of moving bodies, an operation required while ensuring safety during operation of a safety stop function. It is an object of the present invention to provide a safety control method and a safety system for a machining apparatus that can execute the above.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the safety management method for a machining apparatus according to claim 1 of the present invention includes a control unit that controls driving of a plurality of moving bodies and has a safety stop function for stopping the operations of the moving bodies. When the safety stop release signal is input during the operation of the safety stop function, the control means performs the safety stop function only for a specific operation required. It is characterized by releasing.
[0007]
In the safety management method of this processing device, when the safety stop release signal is input to the control means during the operation of the safety stop function, the safety stop function is released only for the specific operation that is required. The required operation can be performed while ensuring the performance. For this reason, for example, a necessary operation can be performed in a safe environment without performing an operation with low safety during maintenance or the like.
[0008]
The processing apparatus safety management method according to claim 2, wherein the processing apparatus has a plurality of work areas, and the safety stop release signal is simultaneously input to the control means from at least two work areas. The stop function is not canceled.
[0009]
In this processing apparatus safety management method, for example, when a safety stop release signal is simultaneously input to the control means from two work areas on the front side and the rear side of the processing apparatus, a plurality of operators can simultaneously maintain the processing apparatus. Assuming that the work is going to be performed, the safety stop function should not be canceled to ensure the safety of the worker. Thereby, the interference of the operation | work by a some operator is prevented, the situation where safety is impaired can be prevented beforehand, and high safety | security can be maintained.
[0010]
The safety management method for a machining apparatus according to claim 3, wherein the machining apparatus is at least an automatic mode for performing automatic production based on a preset program, and a manual mode for manually operating the movable body. And the safety stop release signal is input to the control means, the safety stop function is not released when the operation mode is the automatic mode, and only when the operation mode is the manual mode. It is characterized by canceling.
[0011]
In the safety management method of this processing device, when the processing device operates in any one of the operation modes such as the automatic mode and the manual mode, and when the safety stop release signal is input to the control means, the processing device is in the automatic mode. Since the safety stop function is not released, and the safety stop function is released only in the manual mode, the conditions for releasing the safety stop function are limited, and the safety can be further enhanced.
[0012]
The safety system for a machining apparatus according to claim 4 is a safety system for a machining apparatus provided with a control unit having a safety stop function for driving and controlling a plurality of moving bodies and stopping the operation of the moving bodies, A safety release switch that inputs a safety stop release signal to the control means, and a safety circuit that receives the signal from the safety release switch and releases the safety stop function only for a specific operation that is required. It is characterized by that.
[0013]
In the safety system of this processing equipment, when a safety stop release signal is input to the control means by the safety release switch, the safety circuit receives this safety release signal and the safety stop function only for the specific operation required. Is released. Thereby, a required operation can be executed while ensuring safety. For this reason, for example, a necessary operation can be performed in a safe environment without performing an operation with low safety during maintenance or the like.
[0014]
6. The safety system for a machining apparatus according to claim 5, wherein the safety release switch is provided in each of a plurality of work areas of the machining apparatus, and a safety stop release signal is simultaneously sent from the safety release switches of at least two work areas. The safety circuit does not release the safety stop function when input to.
[0015]
In this safety system of a processing apparatus, when a safety stop release signal is simultaneously input to the control means from at least two places from safety release switches provided in each of a plurality of work areas of the processing apparatus, a plurality of operators can simultaneously Assuming that the maintenance work of the processing apparatus is being performed, the safety stop function is not intentionally released to ensure the safety of the operator. Thereby, the interference of the operation | work by a some operator is prevented, the situation where safety is impaired can be prevented beforehand, and high safety | security can be maintained.
[0016]
The safety system for a processing apparatus according to claim 6, wherein the processing apparatus includes at least an automatic mode for performing automatic production based on a preset program and a manual mode for manually operating the movable body. It is configured to be selectively switchable, and when the safety stop release signal is input to the control means from the safety release switch, if the operation mode is the automatic mode, the safety stop function is not released, and the manual mode The safety stop function is canceled only when
[0017]
In the safety system of this processing device, when the processing device operates in one of the operation modes such as the automatic mode and the manual mode, when the safety stop release signal is input to the control means, By releasing the safety stop function only in the manual mode without releasing the safety stop function, the conditions under which the safety stop function can be released are limited, and safety can be further enhanced.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a safety management method and a safety system for a processing apparatus according to the present invention will be described in detail with reference to the drawings. In the present embodiment, description will be made using an electronic component mounting apparatus for mounting an electronic component on a circuit board as an example of a processing apparatus.
FIG. 1 is an external perspective view of an electronic component mounting apparatus 100 on which the safety system of this embodiment is mounted.
The electronic component mounting apparatus 100 is provided with a guide rail 14 for the circuit board 12 in the center of the upper surface of the base 10, and the circuit board 12 is moved from the loader portion 16 on one end side to the mounting position 18 of the electronic component by the conveying belt of the guide rail 14. In addition, it is conveyed from the mounting position 18 to the unloader section 20 on the other end side.
Y tables 22 and 24 are provided on both sides of the upper surface of the base 10 above the circuit board 12, and an X table 26 is suspended between the two Y tables 22 and 24. In addition, a transfer head 28 is attached to the X table 26, so that the transfer head 28 can be moved in the XY plane.
[0019]
The transfer head 28 mounted on the XY robot including the X table 26 and the Y tables 22 and 24 and freely moving on the XY plane (horizontal plane) is supplied with electronic components such as a resistor chip and a chip capacitor. A desired electronic component is sucked by a suction nozzle 34 from a part feeder 30 or a parts tray 32 to which a relatively large electronic component such as an IC or connector such as SOP or QFP is supplied. It is configured so that it can be attached to. Such an electronic component mounting operation is controlled by a control device (not shown) based on a preset mounting program. Various data can be input to the control device through the operation panel 35.
[0020]
A large number of parts feeders 30 are arranged in parallel at both ends of the guide rail 14, and each part feeder is attached with a tape-like part roll containing electronic parts such as a resistor chip and a chip capacitor. Yes. In addition, the part tray 32 can be loaded with a total of two trays 32a whose length is perpendicular to the guide rail 14, and each tray 32a slides toward the guide rail 14 according to the number of parts supplied. The component takeout position in the Y direction is kept constant.
On the tray 32a, electronic components such as QFP are placed.
[0021]
Also, in the electronic component mounting apparatus 100, switches for canceling the function of the safety circuit for each moving body and driving device are respectively attached to the front side and the rear side of the apparatus body (not shown). This safety release switch may be operated in conjunction with the opening and closing of safety covers 40 and 41 provided on the front and rear surfaces of the apparatus, or may be provided independently on the outside of the apparatus main body.
[0022]
According to the electronic component mounting apparatus 100 having the above configuration, when the circuit board 12 carried from the loader unit 16 of the guide rail 14 is transported to the predetermined mounting position 18, the transfer head 28 is moved to the XY robot based on the mounting program. By moving in the XY plane, a desired electronic component is picked up from the parts feeder 30 or the parts tray 32, and the electronic component is mounted at a predetermined position on the circuit board 12. By repeatedly performing the electronic component suction operation and the mounting operation to the circuit board 12, the mounting of the electronic component on the circuit board 12 is completed. The circuit board 12 that has been mounted is carried out from the mounting position 18 to the unloader unit 20, while a new circuit board is carried into the loader unit 16, and the above operation is repeated.
Here, the mounting program is recombination data created by rearranging the mounting order with respect to NC information having information on electronic components that are input and mounted on the electronic component mounting apparatus 100, and the XY robot or the transfer head 28. This is a program converted into a command form for driving the suction nozzle 34 and the like.
[0023]
By the way, the operation modes of the electronic component mounting apparatus 100 include an automatic mode for automatically mounting components, a semi-automatic mode for confirming the mounting operation, a manual mode used for maintenance, and the like. A desired mode can be selected alternatively by input.
In the automatic mode, the mounting apparatus automatically performs each operation of sucking the electronic component, moving it to a predetermined position on the circuit board, and mounting the electronic component on the circuit board based on the set mounting program. Mode, used during the production of circuit boards.
The semi-automatic mode is a mode in which the operation of mounting the electronic component on the circuit board without picking up the electronic component is performed in a pseudo manner, and is used when checking the operation of the mounting program.
The manual mode is a mode in which only a specific part of the device is manually operated when supplying parts to the mounting device or changing the circuit board, or when maintenance occurs due to an abnormality in the device. Used during non-production, such as during initial settings, periodic inspections, and when abnormalities occur.
[0024]
Next, the operation of the safety release switch for each moving body such as an XY robot and the driving device will be described. FIG. 2 shows a block diagram for explaining the control by the safety release switch.
The safety release switches 42a and 42b are provided in respective work areas on the front side and the rear side of the electronic component mounting apparatus 100, and the safety release switch 42a on the front side of the device and the safety release switch 42b on the rear side of the device are switched. Connected to the switch box 44 to set either the ON state or the OFF state. The set ON / OFF state is sent to the control device 46, and a safety function for the drive unit 48 is determined in accordance with input data from the operation panel 35 or the like. A safety circuit 50 that monitors the safety state of the electronic component mounting apparatus 100 is mounted on the control device 46. The drive unit 48 operates by controlling the rotation of the servo motor 54 via the motor driver 52. The safety release switch can be attached to any other position besides the above.
[0025]
The function of the safety circuit 50 configured as described above will be described based on the flowchart shown in FIG.
First, the safety state of the electronic component mounting apparatus 100 is monitored by the safety circuit 50 (step 1; hereinafter abbreviated as S1). Specifically, the safety circuit 50 confirms whether an abnormality occurrence signal is input from a limit switch or the like disposed in each part in the electronic component mounting apparatus 100. When the safety circuit 50 does not detect the abnormality of the device, it is determined that the electronic device mounting apparatus 100 is in a normal state and the control device 46 is in a state in which the machine can continue operation (S2). In this case, the same determination is made for any of the automatic, semi-automatic, and manual operation modes. On the other hand, when the safety circuit 50 detects an abnormality during the monitoring of the safety state of the electronic component mounting apparatus 100, the control device 46 forcibly stops the drive unit 48 of the electronic component mounting apparatus 100 (S3). It is determined that the operation cannot be continued (S4).
[0026]
Next, the safety stop function is canceled in order to cause the mechanical operation of the drive unit 48 that has been forcibly stopped to function again. If the safety release switch 42a on the front side of the device is turned on (released) and the safety release switch 42b on the rear side of the device is OFF (not released), the safety circuit 50 of the control device 46 is in manual mode. The machine operation limited only in the above is enabled (S5). At this time, the control device 46 monitors the safety state by the safety circuit 50 even if limited machine operation is possible, and forcibly stops the device when the safety circuit 50 detects an abnormality (S3). This operation is the same when the safety release switch 42a on the front side of the apparatus is OFF (not released) and the safety release switch 42b on the rear side of the apparatus is ON (released).
[0027]
Further, when the safety release switch 42a on the front side of the device is ON (released) and the safety release switch 42b on the rear side of the device is ON (released), that is, both safety release switches 42a and 42b both release the safety stop function. Therefore, it is assumed that the operator is working on the front side and the rear side of the device at the same time, and the safety circuit 50 of the control device 46 cancels the safety stop function in consideration of the danger of the work. Not performed.
Furthermore, when the safety release switch 42a on the front side of the apparatus is OFF (not released) and the safety release switch 42b on the rear side of the apparatus is OFF (not released), an operation for releasing the safety stop mechanism is performed. Therefore, the control device 46 does not release the safety stop function.
[0028]
As described above, the safety circuit 50 of the control device 46 is necessary for maintenance or the like without releasing the safety stop function when the electronic component mounting apparatus 100 is not in a state of maintaining safety. Even when only a part of the machine operation is functioning, the safety state is always monitored. Thereby, high safety can always be maintained in various handling scenes of the electronic component mounting apparatus 100.
In the above example, the release of the safety stop function from the state in which the safety circuit 50 detects an abnormality and the drive unit 48 is forcibly stopped is described. Can be maintained. That is, the functional safety circuit 50 operates even during normal operation of the electronic component mounting apparatus 100, and the operation of the drive unit 48 is limited by the excitation of the motor. Even when the apparatus is stopped in this normal state, safety can be reliably maintained by releasing the safety stop function in the same manner as described above.
[0029]
The specific details of the limited machine operation include, for example, when the motor driven in a normal time is a linear system and the moving speed is 25 m / sec or more, the moving speed is less than 25 m / sec. May be set. In addition, if the force acting on the rotating object linked to the motor to be rotated is 0.1 N or more, the force acting on the rotating object should be less than 0.1 N, and those that cannot maintain safety should not be made operable. To. In this way, it is possible to perform necessary work while ensuring safety by making it possible to operate only limited operations based on the judgment criteria corresponding to the risks that occur with machine operations. it can.
[0030]
The processing apparatus safety management method and safety system according to the present invention described above are applied to a configuration including a multiple-type head in which a plurality of mounting heads are connected as in the electronic component mounting apparatus 100 shown in FIG. The present invention is not limited to this, and can also be applied to a configuration having a rotary head that can be mounted at high speed.
Here, FIG. 4 shows the appearance of the entire electronic component mounting apparatus provided with the rotary head, and FIG. 5 shows a schematic configuration of the component mounting mechanism of the electronic component mounting apparatus.
As shown in FIG. 4, the electronic component mounting apparatus 200 mainly has a component supply unit 60 that supplies electronic components and an electronic component that is attracted and mounted on a circuit board at a predetermined component supply position of the component supply unit 60. The rotary head 62, an XY table 64 for positioning the circuit board, a loader unit 66 into which the circuit board is introduced, and an unloader unit 68 for discharging the circuit board on which the electronic components have been mounted. As the operation, the circuit board supplied from the loader unit 66 is placed on the XY table 64, while the electronic component is sucked from the component supply unit 60 by the rotary head 62 and is sucked while adjusting the mounting position. The mounted electronic component is mounted on the circuit board on the XY table 64, and the circuit board on which the electronic component has been mounted is carried out from the XY table 64 to the unloader unit 68.
[0031]
As shown in FIG. 5, the component supply unit 60 includes a plurality of component supply units that accommodate a large number of electronic components arranged in parallel in the direction perpendicular to the paper surface, and moves in the parallel direction to a predetermined component supply position. Supply desired electronic components.
The XY table 64 is movably provided between the loader unit 66 and the unloader unit 68. The XY table 64 is moved to a position connected to the substrate transport path of the loader unit 66 to receive the circuit board before mounting the component, It is fixed and moved to the component mounting position of the rotary head 62. Then, when the mounting of the components is completed by repeating the movement of the circuit board according to the mounting position of each electronic component, the circuit board is moved to a position connected to the unloader unit 68 and the circuit board is carried out to the unloader unit 68.
[0032]
The rotary head 62 includes a plurality of mounting heads 72 that adsorb electronic components, a rotating frame body 74 that is rotatably driven by supporting the mounting head 72 on the peripheral surface so as to move up and down, and an index rotation driving of the rotating frame body 74. An intermittent rotation drive device 76 is provided.
The mounting head 72 continuously rotates and moves from the component supply position of the component supply unit 60 to the component mounting position on the opposite side by the rotation of the rotating frame 74, and moves downward at the component supply position of the component supply unit 60. Then, the electronic component is sucked and moved downward at the component mounting position of the rotary head 62 to mount the electronic component on the circuit board.
The same safety management method can be applied to the electronic component mounting apparatus 200 having such a rotary head by adopting the safety system of the processing apparatus of the present invention, and the same effects as described above can be obtained.
[0033]
Furthermore, the safety management method and safety system for a processing apparatus according to the present invention is not limited to the electronic component mounting apparatus described above, and cream solder is printed on the circuit board as shown in FIG. 6 as an example of the circuit board production line. The present invention can be similarly applied to circuit board processing apparatuses such as a cream solder printing apparatus 90 and an adhesive application apparatus 92 that applies an adhesive for fixing a component to a mounting position of an electronic component.
[0034]
【The invention's effect】
According to the safety management method for a machining apparatus of the present invention, when a safety stop release signal is input to the control means during operation of the safety stop function, the safety stop function is released only for a specific operation required. Thus, the required operation can be executed while ensuring safety. Further, according to the safety system of the processing apparatus of the present invention, when a safety stop release signal is input to the control means by the safety release switch, the safety circuit receives this safety release signal and performs a specific operation required. Only the safety stop function is canceled. This makes it possible to perform necessary operations while ensuring safety.For example, necessary operations can be performed in a safe environment without performing operations with low safety during maintenance. it can.
[Brief description of the drawings]
FIG. 1 is an external perspective view of an electronic component mounting apparatus on which a safety system is mounted.
FIG. 2 is a block diagram illustrating control by a safety release switch.
FIG. 3 is a flowchart illustrating functions of a safety circuit.
FIG. 4 is a diagram showing an external appearance of an entire electronic component mounting apparatus including a rotary head.
FIG. 5 is a diagram showing a schematic configuration of a component mounting mechanism of the electronic component mounting apparatus.
FIG. 6 is a diagram showing an example of a circuit board production line.
[Explanation of symbols]
12 circuit board 35 operation panel 40, 41 safety cover 42a, 42b safety release switch 46 control device 48 drive unit 50 safety circuit

Claims (4)

A safety management method for a machining apparatus provided with a control means having a safety stop function for driving and controlling a plurality of moving bodies and stopping the operation of the moving bodies,
When the safety stop release signal is input during operation of the safety stop function, the control means releases the safety stop function only for a specific operation required ,
The machining apparatus has a plurality of work areas, and the safety stop function is not released when the safety stop release signal is simultaneously input to the control means from at least two work areas. Device safety management method. A safety management method for a machining apparatus provided with a control means having a safety stop function for driving and controlling a plurality of moving bodies and stopping the operation of the moving bodies,
When the safety stop release signal is input during operation of the safety stop function, the control means releases the safety stop function only for a specific operation required,
The processing apparatus has at least an automatic mode for performing automatic production based on a preset program, and a manual mode for manually operating the movable body,
When the safety stop release signal is input to the control means, the safety stop function is not released when the operation mode is the automatic mode, and the safety stop function is released only when the operation mode is the manual mode. safety management method of machining equipment said. A safety system for a machining apparatus provided with a control means having a safety stop function for driving and controlling a plurality of moving bodies and stopping the operation of the moving bodies,
A safety release switch for inputting a safety stop release signal to the control means;
Wherein receiving a signal from the arming switch, e Bei a safety circuit that only releases the safety stop function for a particular operation that is required,
When the safety release switch is provided in each of the plurality of work areas of the processing apparatus and a safety stop release signal is simultaneously input to the control means from the safety release switches of at least two work areas, the safety circuit is safely stopped. A safety system for machining equipment, which does not release functions. A safety system for a machining apparatus provided with a control means having a safety stop function for driving and controlling a plurality of moving bodies and stopping the operation of the moving bodies,
A safety release switch for inputting a safety stop release signal to the control means;
A safety circuit that receives a signal from the safety release switch and releases the safety stop function only for a specific operation required;
The processing apparatus is configured to selectively switch at least an automatic mode for performing automatic production based on a preset program and a manual mode for manually operating the movable body,
When a safety stop release signal is input to the control means from the safety release switch, the safety stop function is not released in the automatic mode, and the safety stop function is released only in the manual mode. safety system of machining equipment shall be the feature.

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