WO2010104157A1 - 作業装置及び作業方法 - Google Patents
作業装置及び作業方法 Download PDFInfo
- Publication number
- WO2010104157A1 WO2010104157A1 PCT/JP2010/054142 JP2010054142W WO2010104157A1 WO 2010104157 A1 WO2010104157 A1 WO 2010104157A1 JP 2010054142 W JP2010054142 W JP 2010054142W WO 2010104157 A1 WO2010104157 A1 WO 2010104157A1
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- WO
- WIPO (PCT)
- Prior art keywords
- balancer
- arm
- robot
- balancer arm
- work
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/0008—Balancing devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20207—Multiple controlling elements for single controlled element
- Y10T74/20305—Robotic arm
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20207—Multiple controlling elements for single controlled element
- Y10T74/20305—Robotic arm
- Y10T74/20329—Joint between elements
Definitions
- the present invention relates to a working device having an articulated robot. More specifically, the present invention relates to a working apparatus and a working method that can cooperate a balancer with an articulated robot.
- Japanese Patent Application Laid-Open No. 2000-210825 describes an assembling apparatus that automatically assembles a tire, which is one of heavy parts, to an automobile body using an articulated robot. More specifically, the assembling apparatus disclosed in Japanese Patent Laid-Open No. 2000-210825 has a plurality of nut runners (114a to 114d) that can dispose nuts (24) corresponding to the number of hub bolts of the vehicle at predetermined circumferential intervals.
- the nut (24) fed from the nut supply mechanism (22) is arranged around the nut runners (114a to 114d, 116) corresponding to a circumferential interval at which all of the nut runners (114a to 114d, 116) are arranged, and the nut ( 24) and a nut arrangement mechanism (33) for transferring the nut runners (114a to 114d, 116) to the nut runner (Japanese Patent Laid-Open No. 2000-210825) Irradiation).
- a balancer may be used for an operator to move heavy parts (for example, JP 2001-139300 A).
- JP 2001-139300 A In the balancer disclosed in Japanese Patent Laid-Open No. 2001-139300, when the cargo handling object (2) is suspended from the hook (19), an upward output corresponding to the weight of the cargo handling object (2) is made.
- a cargo handling thing (2) can be moved to a horizontal direction via an arm (1).
- the operator operates the operation lever (17) the cargo handling article (2) can be moved in the vertical direction via the arm (1) (for example, paragraph [0006] of JP-A-2001-139300).
- a tire gripping means (110) for gripping the tire (20) and a plurality of nut runners (114a to 114d, 116) for tightening the tire (20) to the vehicle are provided as a single unit.
- the robot (10) is mounted.
- the present invention addresses this type of request, and an object thereof is to provide a working device and a working method capable of efficiently performing a desired work with a simple and compact configuration.
- the working device includes a balancer and an articulated robot, and the balancer supports a workpiece or an external device by a balancer arm, and outputs according to the weight of the workpiece or the external device.
- the balancer arm can be maintained at a constant height, the balancer arm can be moved horizontally in accordance with a horizontal external force applied to the balancer arm, and can be moved up and down in response to an external command. Controls the lift operation of the balancer arm by instructing the balancer to move up and down, and applies the horizontal external force to the balancer arm via the robot arm, thereby moving the balancer arm horizontally. It is made to move.
- the displacement of the balancer arm can be controlled by the robot arm.
- the work by the robot arm can be assisted by the balancer arm, and the articulated robot can be reduced in size and simplified. Therefore, a desired work can be efficiently performed with a simple and compact configuration.
- the balancer includes an elevating switch that controls the elevating operation of the balancer arm from the outside, and the robot may control the elevating operation of the balancer arm by operating the elevating switch via the robot arm. Good.
- the maximum power or maximum rated output of the robot (the maximum of the rated output of each drive source of the actuator) may be 80 watts or less.
- the articulated robot is an international standardization organization (ISO) standard (ISO-10218-1: safety requirements for robots in industrial environments) or a Japanese industry standard (JIS) standard (JIS B 8433-1: Industry). Can be fulfilled, or the robot can be excluded from the scope of the Occupational Safety and Health Regulations.
- the working device may further include a connecting tool that connects the balancer arm and the robot arm, and the connecting tool may make the robot arm detachable from the balancer arm. Thereby, if necessary, the robot arm can be separated from the balancer arm, and the balancer arm can be applied to another use (for example, assistance of work by an operator).
- the working device includes a driving device that applies a driving force in a vertical direction to the balancer arm, and a control device that controls the driving device.
- the control device adds to the weight of the workpiece or the external device. Controlling the driving device so as to keep a constant height of the balancer arm with an output according to the weight of the robot arm, and further raising the balancer arm according to the rise of the robot arm,
- the drive device may be controlled so as to lower the balancer arm in accordance with the lowering. Accordingly, since the weight of the robot arm is supported by the balancer arm, the robot arm does not need to support its own weight in the vertical direction, and the output of the robot arm can be reduced. Therefore, it is possible to reduce the output of the robot, and as a result, for example, the robot can be used even in an environment where an operator is present.
- the drive device can include, for example, at least one of a motor and an air cylinder.
- a working device includes a balancer, an articulated robot, a balancer arm of the balancer, and a connecting tool that physically connects the robot arm of the robot.
- an external device is supported by the balancer arm, the balancer arm is kept at a constant height with an output corresponding to the weight of the work or the external device, and the horizontal force applied to the balancer arm is
- the balancer arm is moved horizontally, and a lift switch for controlling the lift operation of the balancer arm from the outside is provided.
- the robot controls the lift operation of the balancer arm by operating the lift switch via the robot arm. And horizontally outside the balancer arm via the robot arm and the connector.
- the displacement of the balancer arm can be controlled by the robot arm.
- the work by the robot arm can be assisted by the balancer arm, and the articulated robot can be reduced in size and simplified. Therefore, a desired work can be efficiently performed with a simple and compact configuration.
- the lift switch of the balancer includes a rotation lever capable of rotating a predetermined angle range in a virtual vertical plane, and a potentiometer that detects a rotation angle of the rotation lever, and when the rotation lever is horizontal,
- a rotation lever capable of rotating a predetermined angle range in a virtual vertical plane
- a potentiometer that detects a rotation angle of the rotation lever, and when the rotation lever is horizontal
- the present invention can be realized by using a commercially available balancer and a commercially available articulated robot. It is possible to realize the working device according to the above. Further, when the rotary lever is displaced upward, the balancer arm is raised, and when the rotary lever is displaced downward, the balancer arm is lowered, so that the robot arm and the slider are prior to the balancer arm displacement. Therefore, it is possible to move in the vertical direction, and workability is improved.
- the slider is formed with a cam groove that engages with the tip of the rotary lever.
- the tip of the rotary lever enters the cam groove.
- the tip of the rotary lever may come out of the cam groove.
- a position sensor for detecting the position of the slider may be provided in at least one of the upper limit position and the lower limit position of the slider.
- the connector may be configured such that the robot arm is detachable from the balancer arm. Thereby, if necessary, the robot arm can be separated from the balancer arm, and the balancer arm can be applied to another use (for example, assistance of work by an operator).
- a work method is a work method using a work device including a balancer that supports a work or an external device by a balancer arm and an articulated robot having a robot arm, and the work or In the state where the external device is supported, by instructing the balancer to move up and down from the robot, the step of raising and lowering the balancer arm, while the work piece or the external device is supported by the balancer arm, A step of horizontally moving the balancer arm by applying a horizontal external force from the robot arm to the balancer arm, wherein the maximum power or maximum rated output of the robot is 80 watts or less.
- a working method is a working method using a working device including a balancer that supports a workpiece or an external device by a balancer arm, and an articulated robot having a robot arm connected to the balancer arm by a connector.
- a step of horizontally moving the balancer arm by applying an external force in the horizontal direction from the robot arm to the balancer arm via the connector in a state where the device is supported.
- the control unit of the balancer is a flowchart for controlling the output of the motor. It is a flowchart which transfers a workpiece
- 2nd Embodiment it is a side view of the said workpiece conveyance apparatus holding the workpiece
- the control part of a balancer is a flowchart which controls the output of an air cylinder.
- FIG. 1 is an explanatory perspective view of an assembly line 10 in which a work transfer device 12 which is a working device according to a first embodiment of the present invention is arranged.
- FIG. 2 is a side view of the workpiece transfer device 12 holding the workpiece 14.
- the assembly line 10 takes out one of the workpieces 14 from the carriage 16 on which a plurality of workpieces 14 (for example, suspension parts) are placed, and transfers them to the pallet jig 18 on the conveyor 20.
- the pallet jig 18 on which the workpiece 14 is placed is conveyed in the direction of arrow X in FIG.
- the workpiece transfer device 12 includes a balancer 22 suspended from the ceiling, a hand jig 24 attached to the tip of the balancer 22, and an articulated robot 26.
- the robot 26 is disposed on the slide rail 28 and can move its position as necessary.
- the balancer arm 30 of the balancer 22 and the robot arm 32 of the robot 26 are connected by a connecting tool 34.
- the balancer 22 generates a force in the vertical direction according to the load applied to the balancer arm 30 by a motor 36 (driving device), and the work 14 supported by the hand jig 24 attached to the tip of the balancer arm 30 is in the air. It can be made stationary (the height of the work 14 is kept constant). Further, the balancer 22 can horizontally move the hand jig 24 and the work 14 supported by the hand jig 24 according to the horizontal external force applied to the balancer arm 30. Further, the balancer 22 can raise and lower the balancer arm 30 by a method described later.
- an air cylinder may be used instead of the motor 36, or a combination of the motor 36 and the air cylinder (for example, as described in Japanese Patent Laid-Open No. 2001-139300) is used. May be.
- FIG. 3 is a side view schematically showing the connection state of the balancer arm 30 and the robot arm 32.
- FIG. 4 is a partially cutaway side view showing the connector 34 and its periphery.
- FIG. 5 is an exploded perspective view showing the connector 34 and its periphery.
- FIG. 6 is a perspective view showing the connector 34 and its surroundings.
- a rotary lever 42 that can rotate within a predetermined vertical angle range (for example, ⁇ 30 ° to + 30 °) within a virtual vertical plane.
- a potentiometer unit 40 (hereinafter referred to as “PM unit 40”) including a potentiometer 44 that detects the rotation angle ⁇ [degree] of the lever 42 is provided.
- a roller 46 is provided at the tip of the lever 42.
- FIG. 7 is a diagram showing a schematic configuration for controlling the driving force in the vertical direction in the balancer 22.
- the balancer 22 includes a position sensor 100 and a control unit 104 in addition to the motor 36 and the potentiometer 44.
- the position sensor 100 is provided inside the balancer 22 and detects the position coordinate (height H) of the balancer arm 30 in the vertical direction.
- the control unit 104 controls the output of the motor 36 based on the rotation angle ⁇ detected by the potentiometer 44 and the height H detected by the position sensor 100.
- FIG. 8 is an explanatory view schematically showing a state in which the lifting / lowering operation of the balancer arm 30 is controlled by the robot arm 32.
- the lever 42 when the lever 42 is at the initial position P1, the lever 42 is horizontal and the rotation angle ⁇ is 0 °.
- the balancer 22 When the lever 42 is at the initial position P1, the balancer 22 does not move up and down, and the height of the balancer arm 30 and the hand jig 24 is kept constant under the action of the motor 36.
- the balancer 22 When the lever 42 is rotated vertically upward, for example, at the position P2, the balancer 22 performs a lifting operation under the action of the motor 36, and displaces the balancer arm 30 and the hand jig 24 vertically upward.
- the robot 26 includes a control unit 48 (FIGS. 2 and 3) in addition to the robot arm 32, and controls the operation of the robot arm 32 in accordance with a command from the control unit 48.
- the distal end portion of the robot arm 32 is connected to the balancer arm 30 via a connector 34.
- a horizontal external force can be applied from the robot arm 32 to the balancer arm 30 via the connector 34, and the lever 42 of the balancer arm 30 can be operated by the vertical movement of the robot arm 32 ( Details will be described later).
- the maximum power of a motor (not shown) that is a drive source of each joint of the robot arm 32 is 80 W or less.
- the connector 34 includes a cylindrical member 50 having a substantially rectangular cross section, a connecting member 52 that connects the cylindrical member 50 and the balancer arm 30, and a vertical direction inside the cylindrical member 50.
- Two linear guides 54 arranged and a slider 56 sandwiched between the two linear guides 54 and connected and fixed to the robot arm 32 are provided.
- the slider 56 is displaced in the vertical direction between the two linear guides 54 accordingly.
- other members the cylindrical member 50, the connecting member 52, and the linear guide 54
- the connecting member 52 is fixed to the balancer arm 30 by a plurality of bolts 58.
- a cam groove 62 is formed on the surface 60 of the slider 56 on the side opposite to the robot arm 32.
- the cam groove 62 has a positional relationship such that the roller 46 of the lever 42 enters.
- the roller 46 is removed from the cam groove 62, and the roller 46 comes into contact with a portion of the surface 60 other than the cam groove 62.
- the lever 42 rotates and moves the balancer arm 30 up and down.
- the cylindrical member 50 is provided with two proximity sensors 64.
- the positions where the proximity sensor 64 is disposed are the upper limit position Pu and the lower limit position Pl of the slider 56 (see FIG. 8).
- the arrangement of the proximity sensors 64 is changed and displayed.
- the output of the proximity sensor 64 is transmitted to the control unit 48 of the robot 26 via a communication line (not shown).
- the control unit 48 stops the operation of the robot arm 32.
- FIG. 9 is a flowchart in which the control unit 104 controls the output of the motor 36.
- step S ⁇ b> 1 the control unit 104 determines whether an elevation command has been issued to the PM unit 40 based on the rotation angle ⁇ detected by the potentiometer 44. For example, when the rotation angle ⁇ is 30 ° (when the lever 42 is at the position P2), it is determined that there is a command to raise the balancer arm 30. When the rotation angle ⁇ is ⁇ 30 ° (when the lever 42 is at the position P3), it is determined that there is a command to lower the balancer arm 30.
- the balancer arm 30 can be raised, and the output of the motor 36 can be increased as the rotation angle ⁇ increases.
- the rotation angle ⁇ is a negative value
- the balancer arm 30 is lowered, and the output of the motor 36 can be lowered as the absolute value of the rotation angle ⁇ increases.
- step S2 When there is an elevation command (S1: YES), in step S2, the control unit 104 adjusts the output of the motor 36 in accordance with the elevation command. In subsequent step S ⁇ b> 3, the control unit 104 determines whether or not the raising / lowering command for the PM unit 40 has ended (for example, whether or not the rotation angle ⁇ has become 0 °).
- the process returns to step S2.
- the control unit 104 acquires the height H from the position sensor 100 in step S4.
- the height H acquired here is called “height H (current)”.
- a value used as the previous height H in the next process is referred to as “height H (previous)”.
- the control unit 104 stores the height H (current) as the height H (previous) in a memory (not shown).
- step S6 the control unit 104 acquires the height H (current) from the position sensor 100. If the current process is the first time and the height H (previous) does not exist, step S6 is performed twice, the first time being the height H (previous), and the second time being the height H (current). To do.
- step S7 the control unit 104 determines whether or not the height H (current) exceeds the height H (previous).
- the control unit 104 decreases the output of the motor 36. Thereby, the raising speed of the balancer arm 30 can be reduced and the height H of the balancer arm 30 can be maintained.
- the process proceeds to step S9.
- step S9 the control unit 104 determines whether the height H (current) is lower than the height H (previous). When the height H (current) is lower than the height H (previous) (S9: YES), it indicates that the balancer arm 30 is lowered. Therefore, in step S10, the control unit 104 increases the output of the motor 36. Thereby, the descending speed of the balancer arm 30 can be reduced, and the height H of the balancer arm 30 can be maintained. When the height H (current) does not fall below the height H (previous) (S9: NO), the control unit 104 maintains the output of the motor 36 in step S11.
- Step S5 the control unit 104 stores the height H (current) as the height H (previous) in a memory (not shown).
- the control unit 104 repeats the process of FIG. 9 at a fixed cycle of, for example, several microseconds to several hundred microseconds.
- FIG. 10 is a flowchart for transferring the work 14 onto the pallet jig 18 on the conveyor 20.
- the control unit 48 of the robot 26 determines whether or not the carriage 16 is positioned at the predetermined position Pc by a sensor (not shown). Positioning of the carriage 16 is performed by an operator 70 (FIG. 1).
- step S21 is repeated.
- the control unit 48 displaces the robot arm 32 while the balancer 22 is operating, and causes the hand jig 24 to support the workpiece 14.
- the position of the workpiece 14 to be moved is detected by another sensor (not shown).
- the control unit 48 moves the robot arm 32 up and down and operates the PM unit 40 to move the balancer arm 30 up and down to move the hand jig 24 up and down.
- control unit 48 moves the hand jig 24 horizontally by moving the robot arm 32 horizontally. That is, as the robot arm 32 moves horizontally, the slider 56 fixed to the robot arm 32 also moves horizontally. When the slider 56 moves horizontally, the pressing force associated therewith is transmitted to the balancer arm 30 via the cylindrical member 50 and the connecting member 52, at least one of the two linear guides 54. As a result, the balancer arm 30 and the hand jig 24 also move horizontally.
- step S23 the control unit 48 controls the robot arm 32 to transfer the workpiece 14 to the pallet jig 18 arranged on the conveyor 20.
- step S24 the control unit 48 controls the balancer arm 30 to return the hand jig 24 to the carriage 16 and determines whether or not the next workpiece 14 exists.
- S24: YES the process returns to step S22. If there is no next workpiece 14 (S24: NO), the current process is terminated. And the transfer of the workpiece
- the coupling tool 34 is removed from the balancer arm 30. More specifically, the coupling tool 34 and the robot arm 32 are separated from the balancer arm 30 by removing the bolt 58. Next, the robot 26 is retracted from the work position via the slide rail 28. While the robot 26 is being repaired, the operator 70 can transfer the workpiece 14 to the pallet jig 18 while operating the lever 42.
- the displacement of the balancer arm 30 can be controlled by the robot arm 32.
- the work by the robot arm 32 can be assisted by the balancer arm 30, so that the articulated robot 26 can be reduced in size and simplified. Therefore, a desired work can be efficiently performed with a simple and compact configuration.
- the maximum power of the robot 26 is 80 watts.
- the robot 26 is compliant with the International Organization for Standardization (ISO) standard (ISO-10218-1: safety requirements for robots in industrial environments) or the Japanese Industrial Standard (JIS) standard (JIS B 8433-1: industrial robots).
- Safety requirements-Part 1 Robots).
- the coupling tool 34 is detachable from the balancer arm 30 with respect to the robot arm 32. That is, the robot arm 32 and the balancer arm 30 can be separated by removing the connecting member 52 from the balancer arm 30. As a result, the robot arm 32 can be separated from the balancer arm 30 as necessary, and the balancer arm 30 can be applied to another use (for example, work assistance by the worker 70).
- the robot arm 32 controls the lifting / lowering operation of the balancer arm 30 via the coupler 34 having the linear guide 54 and the slider 56.
- the balancer arm 30 and the robot arm 32 can be connected with a simple configuration.
- Some commercially available balancers have an operation switch that uses a rotary lever and a potentiometer.
- a commercially available balancer and a commercially available articulated robot can be used.
- the workpiece transfer apparatus 12 according to the embodiment can be realized.
- the slider 56 is formed with a cam groove 62 that engages with the roller 46 of the rotation lever 42, and the rotation lever 42 is in a position (initial position P ⁇ b> 1) that stops the lifting / lowering operation of the balancer arm 30.
- the roller 46 enters the cam groove 62, and the roller 46 exits the cam groove 62 when the rotation lever 42 is in a position (for example, the position P ⁇ b> 2 or the position P ⁇ b> 3) that causes the balancer arm 30 to move up or down. .
- the initial position P1 of the rotation lever 42 can be stably held.
- connection device 34 is provided with proximity sensors 64 for detecting the position of the slider 56 at the upper limit position Pu and the lower limit position Pl of the slider 56.
- the coupling tool 34 is detachable from the balancer arm 30 with respect to the robot arm 32. That is, the robot arm 32 and the balancer arm 30 can be separated by removing the connecting member 52 from the balancer arm 30. As a result, the robot arm 32 can be separated from the balancer arm 30 as necessary, and the balancer arm 30 can be applied to another use (for example, work assistance by the worker 70).
- FIG. 11 is an explanatory perspective view of an assembly line 10A on which a work transfer device 12a, which is a work device according to the second embodiment of the present invention, is arranged.
- FIG. 12 is a side view of the workpiece transfer device 12a that holds the workpiece 14.
- the workpiece transfer device 12a of the second embodiment basically has the same configuration as the workpiece transfer device 12 of the first embodiment. Constituent elements similar to those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
- the second embodiment differs from the first embodiment in the following points. That is, in the first embodiment, the robot arm 32 can be moved relative to the balancer arm 30 in the vertical direction (see FIG. 8), but in the second embodiment, the robot arm 32 has the connecting tool 34a. It is being fixed to the balancer arm 30 via. Specifically, as shown in FIG. 13, the tip of the robot arm 32 is fixed to the connector 34a using a bolt 118. Further, the connecting tool 34a is fixed to the tip of the balancer arm 30 with a bolt (not shown). Accordingly, the balancer arm 30 moves with the robot arm 32 in either direction. In other words, the balancer arm 30 of this embodiment supports the weight of the robot arm 32.
- the balancer 22a of the second embodiment includes the air cylinder 120 (drive device) and the lifting guide 122, and does not include the PM unit 40.
- a motor may be used instead of the air cylinder 120, and a combination of the air cylinder 120 and the motor (for example, as described in JP-A-2001-139300) is used. May be.
- FIG. 14 is a diagram showing a schematic configuration for controlling the vertical driving force in the balancer 22a.
- the balancer 22 a includes a load sensor 110, a work sensor 112, and a control unit 114 in addition to the air cylinder 120.
- the load sensor 110 is provided inside the balancer 22a and detects the load L [kg] applied to the balancer arm 30 directly or indirectly.
- the load sensor 110 includes a pressure sensor that detects a pressure applied to a piston (not shown) in the air cylinder 120, and outputs the detected pressure as an indication of the load L.
- a current sensor for detecting the torque of the motor can be used as the load sensor 110.
- the workpiece sensor 112 is, for example, an image sensor disposed near the tip of the balancer arm 30.
- the workpiece sensor 112 can determine whether the balancer arm 30 supports the workpiece 14, and can identify the type of the workpiece 14. Whether the balancer arm 30 supports the workpiece 14 is determined by, for example, comparing the relative position coordinates of the workpiece 14 and the hand jig 24. Further, the type of the work 14 is identified by, for example, extracting the outline of the work 14 and determining whether it matches the reference pattern.
- various sensors such as a proximity sensor and a pressure sensor can be used.
- an IC tag may be provided on the work 14 and a wireless communication device that reads information from the IC tag may be used as a part of the work sensor 112.
- the air cylinder 120 of the second embodiment applies a vertical driving force to the balancer arm 30 as in the first embodiment.
- a vertical driving force for example, an air cylinder as described in JP-A-2001-139300 is used. Can be used.
- the control unit 114 controls the output of the air cylinder 120 based on the load L detected by the load sensor 110 and the work signal Sw indicating information on the work 14 detected by the work sensor 112.
- FIG. 15 is a flowchart in which the control unit 114 controls the output of the air cylinder 120.
- the control unit 114 determines whether or not the balancer arm 30 supports the workpiece 14 based on the workpiece signal Sw from the workpiece sensor 112.
- the control unit 114 sets the initial target value Ltar1 [kg] to the target value of the load L (target load Ltar) [kg]. To do.
- This initial target value Ltar1 is set corresponding to the weight of the robot arm 32 in a state where the workpiece 14 is not supported.
- the robot arm 32 When the air cylinder 120 generates a vertically upward driving force corresponding to the initial target value Ltar1, the robot arm 32 is not subjected to a load in the vertical direction, and the robot arm 32 is in the vertical direction even if its output is small. It becomes possible to hold
- step S33 the control unit 114 specifies the type of the workpiece 14 based on the workpiece signal Sw from the workpiece sensor 112.
- step S ⁇ b> 34 the control unit 114 sets the target load Ltar according to the type of the workpiece 14. The relationship between the type of workpiece 14 and the target load Ltar is stored in advance in a storage unit (not shown) of the control unit 114.
- the target load Ltar can also be controlled as a target value of the torque and pressure.
- step S35 the control unit 114 acquires the load L from the load sensor 110.
- step S36 the control unit 114 determines whether or not the load L exceeds the target load Ltar.
- the load L exceeds the target load Ltar (S36: YES)
- lowering the robot arm 32 by the robot 26 means instructing the balancer 22 to lower the balancer arm 30. Therefore, in step S ⁇ b> 37, the control unit 114 reduces the vertical upward driving force by the air cylinder 120 and lowers the balancer arm 30. Specifically, the pressure applied to the piston (not shown) in the air cylinder 120 is reduced.
- the load L does not exceed the target load Ltar (S36: NO)
- the process proceeds to step S38.
- step S38 the control unit 114 determines whether or not the load L is lower than the target load Ltar.
- the load L is lower than the target load Ltar (S38: YES)
- the robot 26 raising the robot arm 32 means instructing the balancer 22 to raise the balancer arm 30. Therefore, in step S39, the control unit 114 increases the output of the air cylinder 120. That is, the pressure applied to the piston (not shown) in the air cylinder 120 is increased. Thereby, the balancer arm 30 is raised.
- a motor is used instead of or in addition to the air cylinder 120, the torque of the motor is increased.
- step S40 the control unit 114 maintains the height of the balancer arm 30. That is, the pressure applied to the piston (not shown) in the air cylinder 120 is maintained. In addition, when using a motor instead of or in addition to the air cylinder 120, the torque of the motor is maintained.
- the control unit 114 repeats the process of FIG. 14 at a fixed cycle of, for example, several microseconds to several hundred microseconds.
- the following effects can be obtained in addition to the effects of the first embodiment. That is, in the second embodiment, since the weight of the robot arm 32 is supported by the balancer arm 30, the robot arm 32 does not need to support its own weight in the vertical direction, and the output of the motor used in the robot arm 32 is reduced (for example, The maximum power or maximum rated output of the robot 26 can be 80 watts or less). Therefore, the output of the robot 26 can be reduced, and as a result, for example, the robot 26 can be used even in an environment where an operator is present.
- the hand jig 24 is attached to the tip of the balancer arm 30 and the workpiece 14 is transferred.
- the present invention is not limited to this, and the hand jig 24 is replaced with another jig. Then, another workpiece may be conveyed.
- an external device such as a processing device (for example, a nut runner for tire assembly) may be attached to the tip of the robot arm 32 and supported by the balancer arm 30.
- the lifting / lowering operation of the balancer arm 30 is controlled by operating the PM unit 40 by the robot arm 32.
- the robot arm 32 is controlled according to the load L indicating the vertical movement of the robot arm 32.
- the control unit 48 of the robot 26 and the balancers 22 and 22a can communicate with each other, and the control unit 48 controls the lifting / lowering operation of the balancer arm 30 by transmitting an electrical signal instructing the balancers 22 and 22a to perform the lifting / lowering operation. May be.
- the balancers 22 and 22a are configured to be suspended from the ceiling, but may be installed in other places such as a floor.
- the maximum power of the robot 26 is 80 W, but the present invention is not limited to this.
- the value may be smaller than 80 W (for example, 50 W or more and less than 80 W).
- the maximum rated output of the robot 26 may be 80 W or less (for example, 50 W or more and 80 W or less). Thereby, the robot 26 can be excluded from the scope of application of the occupational safety and health rules.
- the balancer arm 30 and the robot arm 32 are connected and fixed by the couplers 34 and 34a. However, if the balancer arm 30 assists the robot arm 32, the balancer arm 30 and the robot arm 32 are connected. It does not have to be fixed.
- the slider 56 is sandwiched between the two linear guides 54.
- the present invention is not limited to this, and a configuration with one linear guide 54 is also possible.
Abstract
Description
[第1実施形態の構成]
図1は、本発明の第1実施形態に係る作業装置であるワーク搬送装置12が配置された組立ライン10の斜視説明図である。図2は、ワーク14を保持したワーク搬送装置12の側面図である。
次に、第1実施形態において、バランサアーム30の鉛直方向の高さHを制御する方法について説明する。高さHは、モータ36の出力を制御することにより制御する。
次に、第1実施形態に係るワーク搬送装置12を用いてワーク14をコンベア20のパレット治具18に移載させる方法について説明する。
以上説明したように、第1実施形態によれば、ロボットアーム32によりバランサアーム30の変位を制御することができる。これにより、ロボットアーム32による作業をバランサアーム30により補助させることができるようになるため、多関節式のロボット26を小型化及び簡素化することが可能となる。従って、簡単且つコンパクトな構成で、所望の作業を効率的に行うことができる。
[第2実施形態の構成(第1実施形態との相違)]
図11は、本発明の第2実施形態に係る作業装置であるワーク搬送装置12aが配置された組立ライン10Aの斜視説明図である。図12は、ワーク14を保持したワーク搬送装置12aの側面図である。
次に、第2実施形態において、バランサアーム30の鉛直方向の高さHを制御する方法について説明する。高さHは、エアシリンダ120の出力を制御することにより制御する。
以上のような第2実施形態によれば、第1実施形態における効果に加え、以下の効果を奏することができる。すなわち、第2実施形態では、ロボットアーム32の重量をバランサアーム30で支えるため、ロボットアーム32は、鉛直方向の自重を支える必要がなくなり、ロボットアーム32で用いるモータの出力を小さくすること(例えば、ロボット26の最大動力又は最大定格出力を80ワット以下とすること)が可能となる。従って、ロボット26を小出力化することが可能となり、その結果、例えば、作業者がいる環境下でもロボット26を用いることが可能となる。
なお、本発明は、上記各実施形態に限らず、この明細書の記載内容に基づき、種々の構成を採り得ることはもちろんである。例えば、以下の構成を採用することができる。
Claims (13)
- バランサ(22、22a)と多関節式のロボット(26)とを備える作業装置(12、12a)であって、
前記バランサ(22、22a)は、
ワーク(14)又は外部機器をバランサアーム(30)により支持し、
前記ワーク(14)又は前記外部機器の重量に応じた出力で前記バランサアーム(30)の高さを一定に保ち、
前記バランサアーム(30)に加えられた水平方向の外力に応じて前記バランサアーム(30)を水平移動させ、
外部からの指令に応じて昇降動作が可能であり、
前記ロボット(26)は、
前記バランサ(22、22a)に対して昇降動作を指令することにより、前記バランサアーム(30)の昇降動作を制御し、
ロボットアーム(32)を介して前記バランサアーム(30)に対して水平方向の外力を加えることにより、前記バランサアーム(30)を水平移動させる
ことを特徴とする作業装置(12、12a)。 - 請求項1記載の作業装置(12)において、
前記バランサ(22)は、外部から前記バランサアーム(30)の昇降動作を制御する昇降スイッチ(40)を備え、
前記ロボット(26)は、前記ロボットアーム(32)を介して前記昇降スイッチ(40)を操作することにより、前記バランサアーム(30)の昇降動作を制御する
ことを特徴とする作業装置(12)。 - 請求項1記載の作業装置(12、12a)において、
前記ロボット(26)の最大動力又は最大定格出力は、80ワット以下である
ことを特徴とする作業装置(12、12a)。 - 請求項1記載の作業装置(12、12a)において、
前記作業装置(12、12a)は、さらに、前記バランサアーム(30)と前記ロボットアーム(32)とを連結する連結具(34、34a)を備え、
前記連結具(34、34a)は、前記ロボットアーム(32)を前記バランサアーム(30)に対して着脱自在とする着脱部材(52)を有する
ことを特徴とする作業装置(12、12a)。 - 請求項1記載の作業装置(12a)において、
前記作業装置(12a)は、前記バランサアーム(30)に対して鉛直方向の駆動力を付与する駆動装置(120)と、前記駆動装置(120)を制御する制御装置(114)とを備え、
前記制御装置(114)は、
前記ワーク(14)又は前記外部機器の重量に加え、前記ロボットアーム(32)の重量に応じた出力で前記バランサアーム(30)の高さを一定に保つように前記駆動装置(120)を制御し、
さらに、前記ロボットアーム(32)の上昇に応じて前記バランサアーム(30)を上昇させ、前記ロボットアーム(32)の下降に応じて前記バランサアーム(30)を下降させるように前記駆動装置(120)を制御する
ことを特徴とする作業装置(12a)。 - 請求項5記載の作業装置(12a)において、
前記駆動装置(120)は、モータ及びエアシリンダの少なくとも一方を含む
ことを特徴とする作業装置(12a)。 - バランサ(22)と、多関節式のロボット(26)と、前記バランサ(22)のバランサアーム(30)と前記ロボット(26)のロボットアーム(32)を物理的に連結する連結具(34)とを備える作業装置(12)であって、
前記バランサ(22)は、
ワーク(14)又は外部機器を前記バランサアーム(30)により支持し、
前記ワーク(14)又は前記外部機器の重量に応じた出力で前記バランサアーム(30)の高さを一定に保ち、
前記バランサアーム(30)に加えられた水平方向の外力に応じて前記バランサアーム(30)を水平移動させ、
外部から前記バランサアーム(30)の昇降動作を制御する昇降スイッチ(40)を備え、
前記ロボット(26)は、
前記ロボットアーム(32)を介して前記昇降スイッチ(40)を操作することにより、前記バランサアーム(30)の昇降動作を制御し、
前記ロボットアーム(32)及び前記連結具(34)を介して前記バランサアーム(30)に対して水平方向の外力を加えることにより、前記バランサアーム(30)を水平移動させる
ことを特徴とする作業装置(12)。 - 請求項7記載の作業装置(12)において、
前記バランサ(22)の前記昇降スイッチ(40)は、仮想垂直面内で所定角度範囲を回転可能な回転レバー(42)と、前記回転レバー(42)の回転角度を検出するポテンショメータ(44)とを備え、
前記回転レバー(42)が水平となっているとき、前記バランサアーム(30)の昇降動作が停止され、前記回転レバー(42)が上方に変位しているとき、前記バランサアーム(30)が上昇し、前記回転レバー(42)が下方に変位しているとき、前記バランサアーム(30)が下降し、
前記連結具(34)は、鉛直方向に配置され前記バランサアーム(30)に連結固定されたリニアガイド(54)と、前記リニアガイド(54)上を進退自在であり且つ前記ロボットアーム(32)に連結固定されたスライダ(56)とを備え、
少なくとも前記回転レバー(42)が水平となっているとき、前記回転レバー(42)の先端(46)と前記スライダ(56)とが係合し、前記ロボット(26)が前記スライダ(56)を介して前記回転レバー(42)を変位させることにより、前記ロボット(26)が前記バランサ(22)の昇降動作を制御する
ことを特徴とする作業装置(12)。 - 請求項8記載の作業装置(12)において、
前記スライダ(56)には、前記回転レバー(42)の先端(46)と係合するカム溝(62)が形成され、
前記回転レバー(42)が前記バランサアーム(30)の昇降動作を停止させる位置にあるとき、前記回転レバー(42)の先端(46)は、前記カム溝(62)に入り込み、前記回転レバー(42)が前記バランサアーム(30)の上昇動作又は下降動作を行わせる位置にあるとき、前記回転レバー(42)の先端(46)は、前記カム溝(62)から抜け出る
ことを特徴とする作業装置(12)。 - 請求項8記載の作業装置(12)において、
前記連結具(34)には、前記スライダ(56)の位置を検出する位置センサ(64)が、前記スライダ(56)の上限位置及び下限位置の少なくとも一方に設けられる
ことを特徴とする作業装置(12)。 - 請求項7記載の作業装置(12)において、
前記連結具(34)は、前記ロボットアーム(32)を前記バランサアーム(30)に対して着脱自在とする着脱部材(52)を有する
ことを特徴とする作業装置(12)。 - ワーク(14)又は外部機器をバランサアーム(30)により支持するバランサ(22、22a)と、ロボットアーム(32)を有する多関節式のロボット(26)とを備える作業装置(12、12a)を用いる作業方法であって、
前記バランサアーム(30)により前記ワーク(14)又は前記外部機器を支持した状態で、前記ロボット(26)から前記バランサ(22、22a)に対して昇降動作を指令することにより、前記バランサアーム(30)を昇降させる工程と、
前記バランサアーム(30)により前記ワーク(14)又は前記外部機器を支持した状態で、前記ロボットアーム(32)から前記バランサアーム(30)に対して水平方向の外力を加えることにより、前記バランサアーム(30)を水平移動させる工程と
を備え、
前記ロボット(26)の最大動力又は最大定格出力は、80ワット以下である
ことを特徴とする作業方法。 - ワーク(14)又は外部機器をバランサアーム(30)により支持するバランサ(22)と、連結具(34)により前記バランサアーム(30)に連結されたロボットアーム(32)を有する多関節式のロボット(26)とを備える作業装置(12)を用いる作業方法であって、
前記バランサアーム(30)により前記ワーク(14)又は前記外部機器を支持した状態で、前記ロボットアーム(32)により前記バランサ(22)の昇降スイッチ(40)を操作して前記バランサアーム(30)を昇降させる工程と、
前記バランサアーム(30)により前記ワーク(14)又は前記外部機器を支持した状態で、前記連結具(34)を介して前記ロボットアーム(32)から前記バランサアーム(30)に水平方向の外力を加えることにより、前記バランサアーム(30)を水平移動させる工程と
を備えることを特徴とする作業方法。
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JP2014128860A (ja) * | 2012-12-28 | 2014-07-10 | Kawasaki Heavy Ind Ltd | 搬送システム |
CN105459090A (zh) * | 2016-01-04 | 2016-04-06 | 江苏科技大学 | 一种示教型六自由度搬运机械手 |
WO2018139574A1 (ja) * | 2017-01-30 | 2018-08-02 | 川崎重工業株式会社 | 搬送システム及びその運転方法 |
JP2018122367A (ja) * | 2017-01-30 | 2018-08-09 | 川崎重工業株式会社 | 搬送システム及びその運転方法 |
WO2019054323A1 (ja) * | 2017-09-12 | 2019-03-21 | Ckd株式会社 | ワーク搬送装置 |
JP2019048364A (ja) * | 2017-09-12 | 2019-03-28 | Ckd株式会社 | ワーク搬送装置 |
TWI693132B (zh) * | 2017-09-12 | 2020-05-11 | 日商喜開理股份有限公司 | 工件搬運裝置 |
JP2022089314A (ja) * | 2020-12-04 | 2022-06-16 | ダイキン工業株式会社 | ワーク搬送装置 |
JP7260797B2 (ja) | 2020-12-04 | 2023-04-19 | ダイキン工業株式会社 | ワーク搬送装置 |
Also Published As
Publication number | Publication date |
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CN102348543A (zh) | 2012-02-08 |
US20110320038A1 (en) | 2011-12-29 |
JP5480246B2 (ja) | 2014-04-23 |
CN102348543B (zh) | 2014-06-04 |
JPWO2010104157A1 (ja) | 2012-09-13 |
US8903547B2 (en) | 2014-12-02 |
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