JP2009275789A - Warning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an accident from happening when an operator conducts an operation for approaching a dangerous part without decreasing an operating rate of a manufacturing facility. <P>SOLUTION: The warning system provided for the manufacturing facility includes a distance sensor 21 and a sensor head 211 of the distance sensor 21 is attached near the dangerous part 10b of a transport device 19 side of a manufacturing device 10 and measures an operator distance d which is the distance between the dangerous part 10b and the operator 9 in a monitoring area 212. When the operator 9 enters a primary warning area 2121, an alarm part issues a first alarm sound based on a signal from the distance sensor 21 and when the operator 9 enters a secondary warning area 2122 which is closer to the dangerous part 10b, the alarm part issues a second warning sound of which alarm level is higher than the first warning sound. Thus, it is possible to prevent an accident from happening when the operator 9 conducts the operation for approaching the dangerous part 10b without decreasing the operating rate of the manufacturing facility. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an alarm system used for equipment that requires work for an operator to approach a dangerous part during operation.

  2. Description of the Related Art Conventionally, various safety measures have been taken in a mechanism (hereinafter referred to as “dangerous part”) that performs dangerous operations such as processing and assembly of parts in a manufacturing facility so that an operator is not injured. For example, when the dangerous part is covered with a box, the operator is protected, or when the dangerous part is a press device, the device is operated only when two switches are pressed simultaneously with both hands, and the dangerous part is maintained. To prevent such a situation. However, when the dangerous part is covered with a box, the apparatus stops every time the box is opened or closed for maintenance or the like, and the operating rate of the apparatus is lowered. In addition, workability by the operator is also reduced. Even in facilities where it is necessary to keep the cleanliness high by the airflow in the clean room, it is not preferable to provide a portion covered by a box. Further, when two switches are used, there is a problem that safety cannot be ensured except for an operator who touches the switch.

  On the other hand, there is a case where a danger prevention system is used in which the vicinity of a dangerous part is monitored by a sensor and the operation of the apparatus is stopped when an approach of an operator is detected. In the case of an industrial product production line, a sensor (a so-called light curtain) in which a plurality of transmission sensors that are horizontally oriented along the production line are arranged in a vertical direction (so-called light curtain) may be used. Thus, when the detection surface is formed and an operator or a tool enters the detection surface and blocks the laser, the operation of the apparatus is stopped. In addition to a sensor that monitors only the approach to the detection surface such as a light curtain, a sensor that measures the distance between the operator and the sensor may be used.

  For example, in the obstacle handling system for a mobile robot disclosed in Patent Document 1, an area sensor is installed on the mobile robot, and two detection areas that are wide and narrow are set. The distance is detected. When a person enters the wide area detection area, a buzzer alarm sounds, and when a person enters the narrow area detection area, the robot arm stops.

Patent Document 2 discloses a robot apparatus provided with an ultrasonic sensor. When the robot apparatus detects a surrounding moving object (person) and the distance between the moving object and the robot apparatus body is within a certain range, the robot apparatus is disclosed. The moving speed of the arm is reduced.
JP 2001-273032 A JP 2000-202790 A

  By the way, in manufacturing equipment for small spindle motors, it is necessary to replenish parts and adhesives during operation, and when low-risk operations such as parts replenishment and maintenance are performed in such equipment, When the approach is sensed by the sensor and the apparatus stops, the operation rate decreases. Moreover, it is necessary to keep the cleanness high in the motor production line, and it is not preferable that the dangerous part is covered with a box.

  This invention is made | formed in view of the said subject, and makes it the main objective to prevent generation | occurrence | production of the accident at the time of an operator performing the operation | work which approaches a dangerous part, without reducing the operation rate of manufacturing equipment.

  The invention according to claim 1 is an alarm system used in a facility that requires an operation in which an operator approaches the dangerous part during operation, and the worker is located in a first region near the dangerous part. A sensor unit that senses that the operator is located in a second region closer to the dangerous part than the first region, and a control unit that receives a signal from the sensor unit And the control unit based on the signal emits a first warning sound when the worker approaches the dangerous part and enters the first region, and the worker further approaches the dangerous part. And a warning unit that emits a second warning sound having a higher level of warning than the first warning sound when entering the second region.

  Invention of Claim 2 is an alarm system of Claim 1, Comprising: The volume of the said 2nd warning sound is larger than the volume of the said 1st warning sound, or the frequency of the said 2nd warning sound is The frequency of the first warning sound is higher than the frequency of the first warning sound, or the first warning sound and the second warning sound are intermittent sounds, and the cycle of the second warning sound is shorter than the cycle of the first warning sound.

  Invention of Claim 3 is an alarm system of Claim 1 or 2, Comprising: The said sensor part approachs the 3rd area | region where the said worker is closer to the said danger part rather than the said 2nd area | region. When the operator enters the third area based on the signal from the sensor unit, the control unit stops the operation of the facility.

  Invention of Claim 4 is an alarm system used for the installation which requires the operation | work which an operator approaches a dangerous part during operation | movement, Comprising: The worker who is the distance between the said dangerous part and the said worker A sensor unit for measuring a distance, a control unit to which a signal from the sensor unit is input, and the control unit based on the signal, the closer the worker approaches the dangerous part, the smaller the worker distance becomes. An alarm unit that emits a warning sound having a high warning level.

  Invention of Claim 5 is the alarm system of Claim 4, Comprising: As the said operator distance becomes small, the volume of the said warning sound is large, or the frequency of the said warning sound is high, or the said warning The sound is an intermittent sound, and the period of the warning sound is short.

  A sixth aspect of the present invention is the alarm system according to any one of the first to fifth aspects, wherein the work by the worker is a part or material supply or a maintenance work.

  The invention according to claim 7 is the alarm system according to any one of claims 1 to 6, wherein the sensor unit emits light or ultrasonic waves, and the light or ultrasonic waves reflected by the operator. It has a reflective distance sensor that measures the distance between the sensor unit and the operator by detecting sound waves.

  The invention according to claim 8 is the alarm system according to claim 7, wherein the sensor unit includes another reflective distance sensor having a detection direction different from the reflective distance sensor around the dangerous part. Have.

  Invention of Claim 9 is an alarm system in any one of Claim 1 thru | or 8, Comprising: The said installation is a line form, The said operation | work by the said operator is the one side along the said installation, and / or Another sensor unit that comprehensively senses the presence of the worker is provided on the other side of the facility that is performed at the end of the facility and is not performed by the worker. When the presence of the worker is detected, the control unit stops the operation of the facility.

  A tenth aspect of the present invention is the alarm system according to any one of the first to ninth aspects, wherein the facility is installed in a clean room.

  In this invention, generation | occurrence | production of the accident at the time of an operator performing the operation | work which approaches a dangerous part can be prevented, without reducing the operation rate of manufacturing equipment. In the inventions of claims 2 and 5, warning sounds having different degrees of warning can be easily generated, and in the invention of claim 3, the safety of the operator can be ensured more reliably. In the invention of claim 8, it is possible to sense the approach of the worker to the dangerous part from various directions.

  FIG. 1 is a diagram showing a manufacturing facility 1 including an alarm system 2 according to the first embodiment of the present invention, and the manufacturing facility 1 is a line-shaped facility that performs a part of manufacturing of a motor. The production facility 1 is installed in a clean room, and clean air is constantly supplied from above in the clean room, so that the cleanliness is kept high. FIG. 2 and FIG. 3 are views showing a state in the process of manufacturing a small spindle motor (hereinafter referred to as “motor”) assembled in the manufacturing facility 1.

  As shown in FIG. 1, the manufacturing facility 1 includes a rotor hub supply device 11 that supplies a rotor hub 31 (see FIG. 2) of a rotor unit 3 that is a rotating body of a motor, and an adhesive application device 12 that applies an adhesive to the rotor hub 31. , A first defective product discharging device 13 for discharging components having a poor adhesive application state, a bearing mechanism mounting device 14 for mounting the motor bearing mechanism 4 (see FIG. 2) to the rotor hub 31, and a field magnet 32 (see FIG. 3) to the rotor hub 31, a field magnet mounting device 15 for heating the assembled product, a second defective product discharging device 17 for discharging components whose assembled state is defective, and completion. A finished product discharge device 18 for discharging the finished parts is sequentially provided, and further, a transport device 19 for transporting the components from the rotor hub supply device 11 toward the finished product discharge device 18 is provided. The conveying device 19 has a plurality of chucks 191 arranged in a line on a rail passing through each device of the manufacturing facility 1, and motor components are held by the chucks 191 and conveyed in the conveying direction indicated by the arrow 19a. Is done.

  In the manufacturing facility 1, first, the rotor hub 31 is prepared on the component supply pallet 111 of the rotor hub supply device 11, and the rotor hub 31 is held one by one on the chuck 191 of the transfer device 19. It is conveyed toward the end. In addition, outside the component supply pallet 111, the worker is directed in a direction indicated by an arrow denoted by reference numeral 11a, and the worker performs a component supply operation. In the following description, the position of the worker indicated by the arrow 11a when performing the work is referred to as “work position 11a”, and other work positions are also indicated by arrows.

  The rotor hub 31 supplied from the rotor hub supply device 11 is conveyed to the adhesive application device 12, and the adhesive is applied to a predetermined position of the rotor hub 31 by the adhesive application device 12. As shown in FIG. 2, the substantially disc-shaped rotor hub 31 has a hole portion 311 in the center and a cylindrical yoke 312 on the upper side of the outer edge portion. A thermosetting adhesive 33 is applied to the upper part of the side surface and the upper part of the inner side surface of the yoke 312. In an operation position indicated by an arrow 12 a on the left side of the adhesive application device 12 in FIG. 1, the operator replenishes the adhesive 33 with respect to the adhesive application device 12.

  The first defective product discharge device 13 to which the rotor hub 31 coated with the adhesive 33 is conveyed has an application state inspection unit 131 and a defective product discharge mechanism 132, and the application state of the adhesive 33 is determined in the application state inspection unit 131. Inspected. If the result of the inspection is a failure (for example, when the coating amount is insufficient), the rotor hub 31 is sent to the defective product discharge mechanism 132 and discharged from the manufacturing facility 1 as a defective product. At the work position indicated by the arrow 13a at the left end of the defective product discharge mechanism 132 in FIG. 1, the defective product discharged by the operator is collected.

  The bearing mechanism mounting device 14 to which the rotor hub 31 is transported next has a bearing mechanism supply part 141 and a bearing mechanism press-fit part 142, and the bearing mechanism 4 (see FIG. 5) from the pallet of the bearing mechanism supply part 141 to the bearing mechanism press-fit part 142. 2) is supplied. In addition, at the work position indicated by the arrow 14a on the left side of the bearing mechanism supply unit 141 in FIG. As shown in FIG. 2, the bearing mechanism 4 includes a cylindrical shaft 41, a cylindrical sleeve 42 into which the shaft 41 is inserted, a sleeve housing 43 covering the upper and side portions of the sleeve 42 in FIG. An annular seal cap 44 is attached to the opening side of the housing 43.

  In the bearing mechanism press-fit portion 142, the rotor hub 31 held and conveyed by the chuck 191 is placed on the placement portion 1421 with the yoke 312 facing upward as shown in FIG. Further, the bearing mechanism 4 is adsorbed and held by the chuck 1422 with the end portion 411 of the shaft 41 protruding from the sleeve housing 43 above the rotor hub 31 downward. The central axis of the rotor hub 31 and the bearing mechanism 4 coincides with the central axis J1 of the bearing mechanism press-fitting portion 142, and the end portion 411 of the shaft 41 is moved to the rotor hub 31 by moving the chuck 1422 downward along the central axis J1. Is press-fitted into the hole 311 (see FIG. 3 in a later step). At this time, the adhesive 33 applied to the inner surface of the hole 311 is spread between the end 411 of the shaft 41 and the hole 311.

  When the bearing mechanism 4 is attached to the rotor hub 31, these are further conveyed to the field magnet attaching device 15 shown in FIG. The field magnet mounting device 15 includes a field magnet supply unit 151 and a field magnet press-fitting unit 152, and the field magnet supply unit 151 uses a field pallet from the pallet of the field magnet supply unit 151 to the field magnet press-fitting unit 152. A magnet 32 (see FIG. 3) is supplied. Further, at the work position indicated by the arrow 15a outside the field magnet supply unit 151, the field magnet 32 is replenished as needed by the worker.

  In the field magnet press-fit portion 152, as shown in FIG. 3, the rotor hub 31 held and transported by the chuck 191 is placed on the placement portion 1521 with the yoke 312 facing upward. The field magnet 32 is attracted and held below the chuck 1522 above the rotor hub 31. The central axes of the rotor hub 31 and the field magnet 32 coincide with the central axis J2 of the field magnet press-fitting portion 152, and the field magnet 32 is moved by the chuck 1522 moving downward along the central axis J2. The rotor hub 31 is pressed into the inner surface of the yoke 312 along the central axis J2 from above. At this time, the adhesive 33 applied to the inner surface of the yoke 312 is spread between the field magnet 32 and the yoke 312. Thereby, the assembly 5 of the rotor part 3 (the rotor hub 31 and the field magnet 32) and the bearing mechanism 4 is formed.

  As shown in FIG. 1, the assembly 5 is conveyed to the heating device 16, and the rotor hub 31 is heated by the induction heating mechanism of the heating device 16 to cure the adhesive 33, and then to the second defective product discharge device 17. Be transported. The second defective product discharge device 17 includes an RRO inspection unit 171 that inspects RRO (Repeable Run Out) of the assembly 5 and a defective product discharge mechanism 172 that discharges defective products. Of the assemblies 5 whose RRO has been inspected by the RRO inspection unit 171, those that are rejected are discharged to the outside as defective products by the defective product discharge mechanism 172. At the work position indicated by the arrow 17a on the left side of the defective product discharge mechanism 172 in FIG. 1, the operator collects the defective product.

  Then, the assembly 5 confirmed as a non-defective product by the RRO inspection unit 171 is conveyed to the finished product discharge device 18, removed from the chuck 191, and delivered onto the tray 181. When the assembly 5 is placed on the entire tray 181, the operator replaces the tray 181 at the work position 18a. As described above, the assembly 5 of the motor rotor 3 and the bearing mechanism 4 is manufactured in the manufacturing facility 1.

  In the manufacturing facility 1, devices disposed along the conveying device 19 (hereinafter, each device is referred to as a “manufacturing device”) include an adhesive application device 12, a bearing mechanism press-in portion 142, and a field magnet press-in portion 152. When the worker approaches during operation, such as the heating device 16 or the like, a dangerous dangerous part exists. On the other hand, as described above, in the manufacturing facility 1, it is necessary to perform an operation in which the worker approaches the dangerous part to each work position while the manufacturing apparatus is in operation. Therefore, in the manufacturing facility 1, an alarm system 2 is provided to prevent accidents, and the safety of workers is ensured. As shown in FIG. 1, the alarm system 2 includes a plurality of distance sensors 21 that are sensor units having a sensor head 211 and an area sensor 22 that is another sensor unit that monitors one side of the manufacturing facility 1. 21 and a control unit 23 to which signals from the area sensor 22 are input, and an alarm unit 24 connected to the control unit 23. Although not shown, the alarm system 2 is also connected to each manufacturing apparatus of the manufacturing facility 1.

  As shown in FIG. 1, work by an operator is performed on one side (the work positions 12 a, 13 a, 14 a, 15 a, and 17 a on the left side in FIG. 1) along the line-shaped production facility 1 and the end (work position) of the production facility 1. 11a, 18a), and each sensor head 211 is arranged around a dangerous portion along the conveying device 19, such as the adhesive application device 12, the bearing mechanism press-fitting portion 142, the field magnet press-fitting portion 152, the heating device 16, and the like. . In FIG. 1, the detection direction of the sensor head 211 is indicated by a broken line, and the rotor hub supply device 11 and the finished product discharge device 18 are provided with two sensor heads 211 having different directions for detecting an operator.

  On the other hand, the other side (the right side in FIG. 1) of the transport device 19 of the manufacturing facility 1 is an area where no work is performed by an operator, and an area sensor 22 is provided along the line of the transport device 19. The area sensor 22 is a so-called light curtain, and includes a light projecting unit 221 and a light receiving unit 222 facing the light projecting unit 221. The light projecting unit 221 has a plurality of lasers arranged in the vertical direction, and the light receiving unit 222 has a plurality of light receiving elements corresponding to the plurality of lasers. As indicated by a broken line in FIG. 1, a detection surface 223 is formed between the light projecting unit 221 and the light receiving unit 222, and when the operator enters the detection surface 223, the light receiving unit 222 blocks the laser. Detected. As described above, on the right side of the transport device 19, the presence of the worker is comprehensively sensed by the area sensor 22.

  FIG. 4 is a block diagram showing a functional configuration of the alarm system 2, and FIG. 5 is a diagram showing a monitoring area of the distance sensor 21. In FIG. 4, only one distance sensor 21 and one manufacturing apparatus 10 are shown. As shown in FIG. 4, the distance sensor 21 includes a sensor head 211 and a determination unit 213, and the sensor head 211 is connected to the determination unit 213. The control unit 23 having the alarm control unit 231 is connected to the determination unit 213 and the area sensor 22 of the distance sensor 21 and receives signals. Further, the control unit 23 is connected to each manufacturing apparatus 10 in the manufacturing facility 1 of FIG. 1, and the alarm control unit 231 is connected to the alarm unit 24.

  FIG. 5 is a plan view showing one manufacturing apparatus 10. In the manufacturing apparatus 10 shown in FIG. 5, parts or materials are supplied or maintenance work such as cleaning is performed in the vicinity of the end opposite to the conveying apparatus 19. The work position 10a is performed by the worker 9, and the transporting device 19 side is a dangerous part 10b having a mechanism that makes it dangerous for the worker 9 to approach during operation. The sensor head 211 of the distance sensor 21 is attached at the end on the conveying device 19 side of the manufacturing apparatus 10 with the direction from the danger part 10b toward the work position 10a (that is, the direction facing the approaching worker 9) as the measurement direction. It is done.

  The sensor head 211 is a reflective distance sensor that performs distance measurement by a triangulation method, and has a light projecting unit and a light receiving unit therein. In the sensor head 211, the laser diode of the light projecting unit emits the light while scanning the light in the horizontal direction, and the light reflected by the worker 9 as the object is condensed on the light receiving unit and is a PSD (Position Sensitive) that is the light receiving element. The position of the reflected light is detected by the detector, and the distance between the operator 9 and the sensor head 211 is measured. The distance measurement is not limited to the triangulation method. For example, the distance may be measured by measuring the time until the modulated light is reflected by the operator and returned.

  Since the sensor head 211 is disposed in the vicinity of the dangerous part 10b as described above, the distance between the worker 9 and the sensor head 211 measured by the sensor head 211 is substantially equal to the worker 9 and the dangerous part. 10b (hereinafter referred to as "worker distance d"). In addition, an area where the alarm system 2 operates (hereinafter referred to as “monitoring area 212”) is set around the dangerous part 10b within the measurable range of the sensor head 211.

  In the monitoring area 212, three areas are set according to the distance from the sensor head 211 (that is, the distance from the dangerous part 10b). Hereinafter, the innermost area when viewed from the sensor head 211 including the work position 10a. “Primary warning area 2121”, an area closer to sensor head 211 and dangerous part 10b than primary warning area 2121 is “secondary warning area 2122”, and an area closer to sensor head 211 and dangerous part 10b than secondary warning area 2122 Is referred to as a “stop region 2123”. When the worker 9 is detected by the sensor head 211, the determination unit 213 to which the worker distance d is given from the sensor head 211 determines the region where the worker 9 is located. Note that the determination unit 213 may be provided as a part of the control unit 23.

  FIG. 6 is a diagram showing an operation flow of the alarm system 2. In the determination unit 213 of the distance sensor 21, the confirmation of the signal from the sensor head 211 shown in steps S <b> 11 to S <b> 13 in FIG. 6 is constantly repeated, and the operator 9 is in the primary warning area 2121, the secondary warning area 2122, and the stop area 2123. It is confirmed whether it is in any position.

  When the worker 9 approaches the danger part 10b and enters the primary warning area 2121, the distance sensor 21 senses that the worker 9 is located in the primary warning area 2121 (step S13), and based on the signal from the determination part 213. Under the control of the alarm control unit 231, the speaker of the alarm unit 24 emits a first warning sound (step S131). Further, when the worker 9 further approaches the dangerous part 10b and enters the secondary warning area 2122, the distance sensor 21 senses that the worker 9 is located in the secondary warning area 2122 (step S12), and the alarm control unit Under the control of 231, the alarm unit 24 emits a second warning sound whose volume is higher than that of the first warning sound from the speaker (step S <b> 121). The second warning sound may be any sound as long as the level of warning is higher than that of the first warning sound. For example, the second warning sound may be a sound having a frequency higher than that of the first warning sound. Further, the first warning sound and the second warning sound may be intermittent sounds, the second warning sound may be a sound having a shorter cycle than the first warning sound, and the second warning sound is more harsh than the first warning sound. Sound quality may be considered.

  When the worker 9 enters the stop area 2123, the distance sensor 21 senses that the worker 9 is in the stop area 2123 (step S11). Based on the signal from the distance sensor 21, the control unit 23 uses the manufacturing apparatus. 10 is immediately stopped (step S111).

  On the other hand, the presence of the worker 9 is detected by the detection surface 223 (see FIG. 1) of the area sensor 22 provided on the right side of the manufacturing facility 1 in FIG. 1 (that is, the worker 9 detects the manufacturing facility 1 in FIG. The control unit 23 stops the operation of the manufacturing facility 1 based on the signal sent from the area sensor 22.

  As described above, in the alarm system 2 according to the first embodiment, the monitoring area 212 that is an area in the vicinity of the dangerous part 10b is divided into a plurality of areas according to the distance from the dangerous part 10b. When the worker 9 is located in the relatively safe primary warning area 2121, the alarm unit 24 emits the first warning sound, and when the worker 9 is located in the secondary warning area 2122 closer to the dangerous part 10 b, A second warning sound having a higher level of warning, such as a higher volume than the first warning sound, is generated. In this way, by issuing an appropriate warning sound according to the degree of danger, an accident when the worker 9 performs an operation of approaching the dangerous part 10b without reducing the operating rate of the manufacturing facility 1 (for example, an accident due to care). Can be prevented.

  In addition, the volume of the second warning sound is made larger than the volume of the first warning sound, the frequency is increased, or in the case of an intermittent sound, the cycle of the second warning sound is made shorter than the cycle of the first warning sound. By doing so, it is possible to easily emit warning sounds with different levels of warning.

  Furthermore, when the distance sensor 21 senses the operator 9 entering the stop area 2123, the operation of the manufacturing facility 1 is stopped under the control of the control unit 23, thereby ensuring the safety of the worker 9 more reliably. Can do.

  On the other hand, a plurality of sensor heads 211 having different detection directions such as the rotor hub supply device 11 and the finished product discharge device 18 are arranged around one danger part, so that the worker 9 can approach the danger part from various directions. It is possible to sense the approach. Further, by using the non-contact type distance sensor 21, measures such as covering the dangerous part with a box are not required, and maintenance can be facilitated and the cleanliness of the manufacturing facility 1 in the clean room can be maintained. Furthermore, by installing the area sensor 22, one side of the manufacturing facility 1 can be comprehensively monitored, and the monitoring cost can be reduced.

  FIG. 7 is a block diagram showing a functional configuration of the alarm system 2a according to the second embodiment provided in the manufacturing facility 1, and FIG. 8 is a diagram showing a monitoring area by the sensor unit 21a of the alarm system 2a. This corresponds to FIG. 4 and FIG. The alarm system 2a is different from the alarm system 2 of FIGS. 4 and 5 in that the sensor head 211 is replaced with a sensor head unit 211a having three sensor heads, and the others are substantially the same. Note that the determination unit 213 included in the sensor unit 21 a in FIG. 7 may be a part of the control unit 23.

  As shown in FIG. 8, the sensor head unit 211a of the sensor unit 21a has a first sensor head 2111, a second sensor head 2112 and a third sensor head 2113, and these sensor heads are manufactured as shown in FIG. A direction toward the work position 10a from the dangerous part 10b (that is, a direction facing the approaching worker 9) is attached as the detection direction at the end of the apparatus 10 on the conveying device 19 side.

  The sensor heads 2111 to 2113 are inexpensive reflective sensors. The light projecting unit emits light, and the light receiving unit detects light reflected by the operator 9. The threshold value of the received light amount at which the sensor heads 2111 to 2113 are turned on is individually determined in advance, and when the worker 9 enters the detection range of each sensor head, the received light amount of the light reflected from the worker 9 becomes the threshold value. In excess of this, the sensor head is turned on (that is, the approach of the operator 9 is detected). The first sensor head 2111 has the widest detection range in the vicinity of the dangerous part 10b, the second sensor head 2112 has a detection range slightly narrower than the first sensor head 2111, and the third sensor head 2113 has the second detection range. It has a narrower detection range than the sensor head 2112.

  The detection range of the first sensor head 2111 corresponds to the monitoring area 212 in FIG. 5, and the area within the detection range of the first sensor head 2111 and outside the detection range of the other sensor heads is a primary warning area 2121 in FIG. Correspondingly (in FIG. 8, the same reference numerals are used as in FIG. 5). An area within the detection range of the second sensor head 2112 and outside the detection range of the third sensor head 2113 corresponds to the secondary warning area 2122, and an area within the detection range of the third sensor head 2113 is stopped. This corresponds to the area 2123.

  FIG. 9 is a diagram showing the flow of the operation of the alarm system 2a. In the alarm system 2a, the discrimination from the sensor head unit 211a shown in steps S11a to S13a in FIG. When it is confirmed that any one of the sensor heads is ON, control such as warning by the control unit 23 is performed.

  As shown in FIGS. 7 to 9, when the worker 9 enters the primary warning area 2121 and only the first sensor head 2111 is turned on (step S <b> 13 a), the determination unit 213 sends it to the control unit 23. Based on the received signal, the speaker of the warning unit 24 emits a first warning sound under the control of the warning control unit 231 (step S131). Further, when the operator 9 enters the secondary warning area 2122 and the second sensor head 2112 (and the first sensor head 2111) is turned on (step S12a), the information is sent from the determination unit 213 to the control unit 23. Based on the received signal, the alarm control unit 231 controls the speaker of the alarm unit 24 to emit a second warning sound having a high level of warning such as a louder volume than the first warning sound (step S121).

  When the operator 9 enters the stop area 2123 and the third sensor head 2113 (and the first sensor head 2111, the second sensor head 2112) is turned on (step S11a), the control is performed from the determination unit 213. The operation of the manufacturing apparatus 10 is promptly stopped by the control of the control unit 23 based on the signal sent to the unit 23 (step S111).

  When the worker 9 enters the detection surface of the area sensor 22 shown in FIG. 7, the operation of the manufacturing apparatus 10 is quickly stopped by the control of the control unit 23.

  Also in the alarm system 2a, as in the alarm system 2 in FIGS. 4 and 5, the worker 9 moves to the dangerous part 10b without lowering the operating rate of the manufacturing facility 1 by emitting an appropriate warning sound according to the degree of danger. It is possible to prevent the occurrence of an accident when performing an approaching work. In addition, by increasing the volume of the second warning sound higher than the volume of the first warning sound, increasing the frequency, or in the case of an intermittent sound, the cycle of the second warning sound is made longer than the cycle of the first warning sound. By shortening, it is possible to easily emit warning sounds with different levels of warning. Furthermore, when the worker 9 enters the stop region 2123, the safety of the worker 9 can be ensured more reliably by stopping the operation of the manufacturing apparatus 10.

  In the alarm system 2a, the primary warning area 2121, the secondary warning area 2122, and the stop area 2123 are set by using together three types of inexpensive sensor heads having different measurement ranges, so that compared with the case where an expensive distance sensor is used. Thus, the introduction cost of the alarm system 2a can be suppressed.

  On the other hand, like the alarm system 2, a plurality of sensor head units 211a having different detection directions, such as the rotor hub supply device 11 and the finished product discharge device 18, are arranged around one dangerous part. The article discharge device 18 can sense the approach of the worker 9 to the dangerous part from various directions. In addition, the non-contact sensor unit 21a eliminates the need for measures such as covering the dangerous part with a box, thereby facilitating maintenance and maintaining the cleanliness of the manufacturing facility 1 in the clean room. Furthermore, by installing the area sensor 22, one side of the manufacturing facility 1 can be comprehensively monitored, and the monitoring cost can be reduced.

  FIG. 10 is a block diagram showing a functional configuration of the alarm system 2b according to the third embodiment, and FIG. 11 is a diagram showing a monitoring area of the distance sensor 21b in the alarm system 2b. As shown in FIG. 10, the alarm system 2 b is different from the alarm system 2 of FIG. 4 in that the determination unit 213 is omitted and a signal indicating distance information from the sensor head 211 is directly input to the control unit 23. The others are almost the same. The manufacturing facility 1 provided with the alarm system 2b is the same as that shown in FIG.

  A sensor head 211 of the distance sensor 21b shown in FIG. 11 is a reflection type distance sensor similar to that shown in FIG. 5, and measures the worker distance d between the worker 9 and the sensor head 211. In the sensor head 211, a monitoring area 212 is set around the dangerous part 10b within the measurable range, and the alarm system 2b operates when the operator 9 enters the monitoring area 212.

  As shown in FIG. 10, a signal indicating the worker distance d measured by the sensor head 211 is sent to the control unit 23, and the speaker of the alarm unit 24 warns by the control of the alarm control unit 231 of the control unit 23 based on the signal. The volume of the warning sound increases continuously as the worker distance d decreases (that is, as the worker 9 approaches the dangerous part 10b). As for the warning sound, in addition to the sound that increases in volume when the worker distance d decreases, any warning sound that emits a warning sound with a higher level of warning as the worker distance d decreases such as the frequency continuously increasing. When the warning sound is an intermittent sound, the cycle may be continuously shortened as the worker distance d decreases. When the worker distance d is further reduced and the worker distance d is equal to or less than a certain distance, the control unit 23 immediately stops the operation of the manufacturing apparatus 10. As shown in FIG. 10, as in the case of the alarm system 2, even when the area sensor 22 provided on one side of the manufacturing facility 1 detects the entry of the worker 9, the operation of the manufacturing apparatus 10 is controlled by the control of the control unit 23. Stop immediately.

  As described above, in the alarm system 2b, as the worker distance d decreases in the monitoring area 212 (that is, the worker 9 approaches the dangerous part 10b), the level of warning sound continuously increases. Thus, it is possible to prevent the occurrence of an accident (for example, an accident due to care) when the worker 9 performs an operation of approaching the dangerous part 10b without reducing the operating rate of the manufacturing facility 1.

  In addition, as the operator 9 approaches the dangerous part 10b, the warning sound is easily increased by increasing the volume of the warning sound, increasing the frequency, or shortening the period in the case of intermittent sound. Furthermore, when the worker 9 enters the stop region 2123, the safety of the worker 9 can be ensured more reliably by stopping the operation of the manufacturing apparatus 10.

  On the other hand, similarly to the alarm system 2, when a plurality of sensor heads 211 having different detection directions are arranged around one dangerous part, such as the rotor hub supply device 11 and the finished product discharge device 18, the dangerous part from various directions. It is possible to sense the approach of the worker to Furthermore, by installing the area sensor 22, one side of the manufacturing facility 1 can be comprehensively monitored, and the monitoring cost can be reduced.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible.

  For example, the work by the worker in the manufacturing facility 1 in which the area sensor 22 is provided is not necessarily performed on one side along the manufacturing facility 1 and the end of the manufacturing facility 1, but only on one side along the manufacturing facility 1 or in manufacturing. It may be performed only at the end of the facility 1. Further, the work may be performed at a position other than the work position shown in FIG. In addition to supplying parts, replenishing materials, taking out defective products, and performing maintenance operations, various operations such as operation of manufacturing equipment may be performed. Periodic calibration may be performed.

  The number of areas set in the monitoring area 212 of the alarm system 2 is not limited to 3, and may be 4 or more. In this case, when the worker 9 approaches the dangerous part 10b, the degree of warning by the warning sound changes a plurality of times, and the operation of the manufacturing apparatus is stopped when entering the area closest to the dangerous part 10b. The warning sound emitted from the speaker of the warning unit 24 may be various kinds of electronic sounds, and may be sounds other than electronic sounds.

  In the first and third embodiments, laser light is emitted from the sensor head 211 while being scanned in the horizontal direction, but a large number of sensor heads 211 that are not scanned with laser light are placed in various directions. The primary warning area 2121, the secondary warning area 2122, and the stop area 2123 may be monitored. Furthermore, when the width of the monitoring area 212 is about the width of the worker's body, monitoring is performed only by providing one sensor head 211 that emits laser light that is not scanned in the direction in which the worker approaches. It can be carried out.

  The distance sensor 21 may emit light and receive reflected light from an operator, or may emit ultrasonic waves and receive reflected waves. In this case, the volume of the reflected waves and ultrasonic waves may be emitted. The distance is measured by the time from when it is reflected to the distance sensor 21 after being reflected by the operator. The distance sensor 21 may be a sensor that detects infrared rays emitted by an operator and measures the distance according to the amount of infrared rays. The worker distance d for determining the ranges of the primary warning area 2121, the secondary warning area 2122, and the stop area 2123 may be set variously. For example, when the manufacturing apparatus 10 in FIG. 5 is small, the worker distance is 1 m or less. The regions that are 80 cm or more, less than 80 cm, 50 cm or more, and less than 50 cm may be the primary warning region 2121, the secondary warning region 2122, and the stop region 2123, respectively.

  In addition, various sensors other than the distance sensor may be used as the sensor unit of the alarm system 2. For example, a plurality of transmission sensors facing the light projecting unit and the light receiving unit may be arranged at a plurality of positions at different distances from the danger unit. It is possible to measure the distance from the dangerous part to the worker by arranging the primary warning area, the secondary warning area, the stop area, and the like.

  The alarm system 2 may be used for equipment other than equipment for assembling a motor.

It is a figure which shows manufacturing equipment. It is a figure which shows the mode in the middle of manufacture of a motor. It is a figure which shows the mode in the middle of manufacture of a motor. It is a block diagram which shows the function structure of an alarm system. It is a figure which shows the monitoring area | region by a distance sensor. It is a figure which shows the flow of operation | movement of an alarm system. It is a block diagram which shows the function structure of an alarm system. It is a figure which shows the monitoring area | region by a sensor part. It is a figure which shows the flow of operation | movement of an alarm system. It is a block diagram which shows the function structure of an alarm system. It is a figure which shows the monitoring area | region by a distance sensor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manufacturing equipment 2,2a, 2b Alarm system 4 Bearing mechanism 9 Worker 10b Dangerous part 21,21b Distance sensor 21a Sensor part 22 Area sensor 23 Control part 24 Alarm part 31 Rotor hub 32 Field magnet 33 Adhesive 2121 Primary warning area 2122 Secondary warning area 2123 Stop area d Worker distance

Claims (10)

It is an alarm system used for equipment that requires work for workers to approach dangerous parts during operation,
Detecting that the worker is located in a first area near the dangerous part and detecting that the worker is located in a second area closer to the dangerous part than the first area. A sensor unit;
A control unit to which a signal from the sensor unit is input;
By the control of the control unit based on the signal, a first warning sound is emitted when the worker approaches the dangerous part and enters the first region, and the worker further approaches the dangerous part and An alarm unit that emits a second warning sound having a higher level of warning than the first warning sound when entering a second region;
An alarm system comprising: The alarm system according to claim 1,
The volume of the second warning sound is larger than the volume of the first warning sound, or the frequency of the second warning sound is higher than the frequency of the first warning sound, or the first warning sound and the first warning sound 2. An alarm system, wherein two warning sounds are intermittent sounds, and a cycle of the second warning sound is shorter than a cycle of the first warning sound. The alarm system according to claim 1 or 2,
The sensor unit senses that the worker has entered a third region closer to the dangerous part than the second region;
The alarm system, wherein the control unit stops the operation of the facility when the worker enters the third region based on the signal from the sensor unit. It is an alarm system used for equipment that requires work for workers to approach dangerous parts during operation,
A sensor unit for measuring a worker distance which is a distance between the dangerous part and the worker;
A control unit to which a signal from the sensor unit is input;
By the control of the control unit based on the signal, an alarm unit that emits a warning sound with a higher degree of warning as the worker approaches the dangerous part and the worker distance decreases;
An alarm system comprising: The alarm system according to claim 4,
As the worker distance decreases, the volume of the warning sound is increased, the frequency of the warning sound is high, or the warning sound is an intermittent sound, and the cycle of the warning sound is short. . The alarm system according to any one of claims 1 to 5,
The alarm system characterized in that the work by the worker is a part or material supply or a maintenance work. The alarm system according to any one of claims 1 to 6,
A reflective distance sensor for measuring a distance between the sensor unit and the worker by detecting the light or the ultrasonic wave reflected by the worker by the sensor unit emitting light or an ultrasonic wave; An alarm system comprising: The alarm system according to claim 7,
The alarm system according to claim 1, wherein the sensor unit includes another reflective distance sensor having a detection direction different from that of the reflective distance sensor around the dangerous part. The alarm system according to any one of claims 1 to 8,
The equipment is line-shaped, and the work by the operator is performed on one side along the equipment and / or at the end of the equipment,
On the other side of the facility where work by the worker is not performed, another sensor unit that comprehensively senses the presence of the worker is provided,
The alarm system, wherein when the presence of the worker is detected by the other sensor unit, the control unit stops the operation of the facility. The alarm system according to any one of claims 1 to 9,
An alarm system, wherein the equipment is installed in a clean room.

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