US20180147719A1 - Robot and robot system - Google Patents
Robot and robot system Download PDFInfo
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- US20180147719A1 US20180147719A1 US15/884,663 US201815884663A US2018147719A1 US 20180147719 A1 US20180147719 A1 US 20180147719A1 US 201815884663 A US201815884663 A US 201815884663A US 2018147719 A1 US2018147719 A1 US 2018147719A1
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- Prior art keywords
- arm
- robot
- axis
- rotation axis
- link
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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
- B25J9/00—Programme-controlled manipulators
- B25J9/06—Programme-controlled manipulators characterised by multi-articulated arms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/0009—Constructional details, e.g. manipulator supports, bases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/0009—Constructional details, e.g. manipulator supports, bases
- B25J9/0018—Bases fixed on ceiling, i.e. upside down manipulators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/02—Programme-controlled manipulators characterised by movement of the arms, e.g. cartesian coordinate type
- B25J9/04—Programme-controlled manipulators characterised by movement of the arms, e.g. cartesian coordinate type by rotating at least one arm, excluding the head movement itself, e.g. cylindrical coordinate type or polar coordinate type
- B25J9/046—Revolute coordinate type
Definitions
- the present invention relates to a robot and a robot system.
- a robot including a robot arm has been known.
- the robot arm a plurality of arms (arm members) are connected to each other through joints, and a hand is mounted on the arm on an endmost side (lowermost stream) as an end effector, for example.
- the joint is driven by a motor and the arm rotates by the driving of the joint.
- the robot grasps a target with a hand, for example, moves the target to a predetermined place, and performs a predetermined operation such as assembly.
- JP-A-2014-46401 discloses a vertically articulated robot.
- a motion for moving a hand to a position rotated by 180° around a first rotation axis which is a rotation axis (rotation axis extending in a vertical direction) disposed furthest on the proximal side (uppermost stream) with respect to a base is performed by rotating a first arm which is an arm disposed furthest on the proximal side with respect to the base around the first rotation axis.
- a production line in which a cell for an operation by a person is replaced with a robot cell for an operation by a robot has been increased.
- a size of the robot cell for an operation by a robot is generally larger than a size of the cell for an operation by a person and the production line becomes long when the cell for an operation by a person is simply replaced with the robot cell for an operation by a robot, and accordingly, the replacement is hardly executed depending on a production site.
- a height of the robot cell for an operation by a robot is great, and accordingly, when a plurality of robot cells are provided in a line, persons are hidden and accordingly, visibility is poor in the production site.
- the center of gravity of the robot cell becomes high and it is easily vibrated. Accordingly, the operation accuracy of the robot becomes poor and a risk of the robot cell falling down becomes high.
- An advantage of some aspects of the invention is to solve at least apart of the problems described above and the invention can be implemented as the following forms or application examples.
- a robot includes: a base; a first arm which is provided on the base so as to be rotatable around a first rotation axis; and a second arm which is provided on the first arm so as to be rotatable around a second rotation axis having an axial direction different from the axial direction of the first rotation axis, in which an angle formed by the first arm and the second arm is set as 0°, when seen in the axial direction of the second rotation axis, and the second arm does not interfere with an attachment surface where the base is provided, when the angle is 0°.
- a robot includes: a base; a first arm which is provided on the base so as to be rotatable around a first rotation axis; and a second arm which is provided on the first arm so as to be rotatable around a second rotation axis having an axial direction different from the axial direction of the first rotation axis, in which the first arm has a length which is greater than the length of the second arm.
- a robot includes: a base; and a robot arm, in which the robot arm includes a first arm which is provided on the base so as to be rotatable around a first rotation axis, and a second arm which is provided on the first arm so as to be rotatable around a second rotation axis having an axial direction different from the axial direction of the first rotation axis, in which the distal end of the robot arm is moved from a first position to a second position which is rotated by 180° around the first rotation axis, through a state where an angle formed by the first arm and the second arm is set as 0° when seen in the axial direction of the second rotation axis, by not rotating the first arm but rotating the second arm.
- the distal end of the robot arm moves from the first position to the second position, the distal end of the robot arm moves on the straight line, when seen in the axial direction of the first rotation axis.
- the distal end of the robot arm is moved from the first position to a third position having the same height as that of the first position and moves the distal end of the robot arm from the third position to the second position.
- the distal end of the robot arm is moved from the second position to a third position having the same height as that of the first position and moves the distal end of the robot arm from the third position to the first position.
- a robot includes: a base; a first arm which is provided on the base so as to be rotatable around a first rotation axis; and a second arm which is provided on the first arm so as to be rotatable around a second rotation axis having an axial direction different from the axial direction of the first rotation axis, in which the first arm and the second arm are overlapped each other when seen in the axial direction of the second rotation axis.
- the second rotation axis is separate from the first rotation axis.
- the robot further includes a third arm which is provided on the second arm so as to be rotatable around a third rotation axis.
- the axial direction of the third rotation axis and the axial direction of the second rotation axis are parallel with each other.
- the third arm has a length which is greater than the length of the second arm.
- the second arm and the third arm overlap each other when seen in the axial direction of the second rotation axis.
- the base is provided on a ceiling. With this configuration, it is possible to provide a robot which is installed on a ceiling.
- the third arm includes a first link which is provided on the second arm so as to be rotatable around the third rotation axis, a second link which is provided on the first link so as to be rotatable around a fourth rotation axis having an axial direction which is different from an axial direction of the third rotation axis, a third link which is provided on the second link so as to be rotatable around a fifth rotation axis having an axial direction which is different from an axial direction of the fourth rotation axis, and a fourth link which is provided on the third link so as to be rotatable around a sixth rotation axis having an axial direction which is different from an axial direction of the fifth rotation axis.
- a robot system includes: a robot; and a robot cell where the robot is provided, in which the robot cell has a height equal to or smaller than 1,700 mm.
- the height thereof is smaller than the height of the cell of the related art, and accordingly, it is possible to check operators operating in other cells.
- the height of the robot cell is from 1,000 mm to 1,650 mm.
- the robot cell has an installation area of less than 637,500 mm 2 .
- the installation area of the robot cell is equal to or smaller than 500,000 mm 2 .
- the installation area of the robot cell is equal to or smaller than 400,000 mm 2 .
- the installation area of the robot cell becomes the installation area having substantially the same or equal to or smaller than the cell for an operation of an operator, and accordingly, it is possible to easily replace the cell for an operation of an operator to the robot cell.
- a volume ratio of the robot with respect to a volume of the robot cell is from 0.01 to 0.5.
- the volume ratio of the robot with respect to the volume of the robot cell is from 0.01 to 0.1.
- the robot has a weight equal to or smaller than 20 kg.
- the robot includes a base provided in the robot cell, a first arm which is provided on the base so as to be rotatable around a first rotation axis, and a second arm which is provided on the first arm so as to be rotatable around a second rotation axis having an axial direction different from the axial direction of the first rotation axis, and the first arm has a length which is greater than the length of the second arm.
- FIG. 1 is a perspective view showing a first embodiment of a robot according to the invention.
- FIG. 2 is a schematic diagram of the robot shown in FIG. 1 .
- FIG. 3 is a front view of the robot shown in FIG. 1 .
- FIG. 4 is a front view of the robot shown in FIG. 1 .
- FIG. 5 is a diagram for illustrating a motion at the time of an operation of the robot shown in FIG. 1 .
- FIG. 6 is a diagram for illustrating a motion at the time of an operation of the robot shown in FIG. 1 .
- FIG. 7A is a diagram for illustrating a motion at the time of an operation of the robot shown in FIG. 1 .
- FIG. 7B is a diagram for illustrating a motion at the time of an operation of the robot shown in FIG. 1 .
- FIG. 7C is a diagram for illustrating a motion at the time of an operation of the robot shown in FIG. 1 .
- FIG. 7D is a diagram for illustrating a motion at the time of an operation of the robot shown in FIG. 1 .
- FIG. 7E is a diagram for illustrating a motion at the time of an operation of the robot shown in FIG. 1 .
- FIG. 8 is a front view showing a second embodiment of a robot according to the invention.
- FIG. 9 is a perspective view showing a third embodiment of a robot according to the invention.
- FIG. 10 is a side view of the robot shown in FIG. 9 .
- FIG. 11 is a perspective view showing a fourth embodiment of a robot according to the invention.
- FIG. 12A is a diagram for illustrating a motion of a robot according to the invention in a fifth embodiment.
- FIG. 12B is a diagram for illustrating a motion of a robot according to the invention in a fifth embodiment.
- FIG. 12C is a diagram for illustrating a motion of a robot according to the invention in a fifth embodiment.
- FIG. 13A is a diagram for illustrating a motion of a robot according to the invention in a sixth embodiment.
- FIG. 13B is a diagram for illustrating a motion of a robot according to the invention in a sixth embodiment.
- FIG. 14 is a front view showing a seventh embodiment of a robot according to the invention.
- FIG. 15 is a perspective view showing an eighth embodiment of a robot system according to the invention.
- FIG. 16 is a front view showing the eighth embodiment of the robot system according to the invention.
- FIG. 17 is a top view showing the eighth embodiment of the robot system according to the invention.
- FIG. 18 is a plan view showing the eighth embodiment of the robot system according to the invention.
- FIG. 19 is a perspective view showing the eighth embodiment of the robot system according to the invention.
- FIG. 1 is a perspective view showing a first embodiment of a robot according to the invention.
- FIG. 2 is a schematic diagram of the robot shown in FIG. 1 .
- FIGS. 3 and 4 are front views of the robot shown in FIG. 1 .
- FIGS. 5, 6, and 7 are respectively diagrams for illustrating a motion at the time of an operation of the robot shown in FIG. 1 .
- FIGS. 1, 2, 3 to 5, and 7 are described with a term “on” or an “upper portion” and the lower side thereof is described with a term “below” or a “lower portion” (the same also applies to a case of FIGS. 8 to 14 of other embodiments), and the base side in FIGS. 1, 2, 3 to 5, and 7 is described with a term “proximal end” or “upstream” and the opposite side thereof (hand side) is described with a term “distal end” or “downstream” (the same also applies to a case of FIGS. 8 to 14 of other embodiments).
- a robot (industrial robot) 1 shown in FIGS. 1 to 4 includes a robot main body (main body portion) 10 and a robot control device (control unit) (not shown) which controls an operation of the robot main body 10 (robot 1 ).
- the robot 1 for example, can be used in a manufacturing step of manufacturing a precision instrument such as a watch.
- the robot control device may be embedded in the robot main body 10 (robot 1 ) or may be separate from the robot main body 10 .
- the robot control device for example, can be configured with a personal computer (PC) in which a central processing unit (CPU) is embedded, for example.
- PC personal computer
- CPU central processing unit
- the robot main body 10 includes a base (support) 11 and a robot arm 5 .
- the robot arm 5 includes a first arm (first arm member) (arm portion) 12 including one link, a second arm (second arm member) (arm portion) 13 including one link, a third arm (third arm member) (arm portion) 14 including a first link 61 , a second link 62 , a third link 63 , and a fourth link 64 (four links), a first driving source 401 , a second driving source 402 , a third driving source 403 , a fourth driving source 404 , a fifth driving source 405 , and a sixth driving source 406 (six driving sources).
- the wrist is configured with the third link 63 and the fourth link 64 of the third arm and an end effector such as a hand 91 or the like can be detachable from a distal end of the fourth link 64 of the third arm, for example (see FIG. 1 ).
- the robot 1 is a vertically articulated (six axes) robot in which the base 11 , the first arm 12 , the second arm 13 , the first link 61 , the second link 62 , the third link 63 , and the fourth link 64 are connected to each other in this order form the proximal side to the distal side.
- the first arm 12 , the second arm 13 , and the third arm 14 are also respectively referred to as the “arm”.
- first link 61 , the second link 62 , the third link 63 , and the fourth link 64 are also respectively referred to as the “link”.
- first driving source 401 , the second driving source 402 , the third driving source 403 , the fourth driving source 404 , the fifth driving source 405 , and the sixth driving source 406 are also respectively referred to as the “driving source”.
- the base 11 is positioned on the uppermost side of the vertically articulated robot and is a portion which is fixed to (member which is attached to) an attachment surface 102 which is a lower surface of a ceiling 101 of an installation space.
- the fixing method thereof is not particularly limited and a fixing method performed with a plurality of bolts can be used, for example.
- a location for the base 11 attached to the attachment surface 102 is not particularly limited, but in the embodiment, any portion of a plate-shaped flange 111 provided on the lower portion of the base 11 and an upper surface of the base 11 can be used.
- the portion where the base 11 is fixed is not particularly limited to a ceiling of the installation space and in addition thereto, a wall of the installation space, a floor, or the ground is used, for example.
- a first joint 171 which will be described later may be contained or not be contained in the base 11 .
- the first arm 12 , the second arm 13 , the first link 61 , the second link 62 , the third link 63 , and the fourth link 64 are respectively supported so as to be independently displaced with respect to the base 11 .
- the joint 171 has a mechanism of supporting the first arm 12 connected to the base 11 to be rotatable with respect to the base. Accordingly, the first arm 12 can rotate around a first rotation axis O 1 parallel to a vertical direction, with respect to the base 11 .
- the first rotation axis O 1 coincides with a lower surface of the ceiling 101 to which the base 11 is attached, that is, a normal line of the attachment surface 102 of the ceiling 101 .
- the first rotation axis O 1 is a rotation axis which is on the uppermost stream of the robot 1 .
- the rotation around the first rotation axis O 1 is performed by the driving of the first driving source 401 including a motor 401 M.
- the first driving source 401 is driven by the motor 401 M and a cable (not shown) and this motor 401 M is controlled by the robot control device through an electrically connected motor driver 301 .
- the first driving source 401 may be configured to transmit a driving force of the motor 401 M by a reduction gear (not shown) which is provided with the motor 401 M, and the reduction gear may be omitted.
- the first arm 12 and the second arm 13 are connected to each other through a joint 172 .
- the joint 172 has a mechanism of supporting one of the first arm 12 and the second arm 13 connected to each other to be rotatable with respect to the other one. Accordingly, the second arm 13 can rotate around a second rotation axis O 2 parallel to a horizontal direction, with respect to the first arm 12 .
- the second rotation axis O 2 is orthogonal to the first rotation axis O 1 .
- the rotation around the second rotation axis O 2 is performed by the driving of the second driving source 402 including a motor 402 M.
- the second driving source 402 is driven by the motor 402 M and a cable (not shown) and this motor 402 M is controlled by the robot control device through an electrically connected motor driver 302 .
- the second driving source 402 may be configured to transmit a driving force from the motor 402 M by a reduction gear (not shown) which is provided with the motor 402 M, and the reduction gear may be omitted.
- the second rotation axis O 2 may be parallel to an axis orthogonal to the first rotation axis O 1 or when the second rotation axis O 2 is not orthogonal to the first rotation axis O 1 , axial directions thereof may be different from each other.
- the second arm 13 and the first link 61 of the third arm 14 are connected to each other through a joint 173 .
- the joint 173 has a mechanism of supporting one of the second arm 13 and the first link 61 connected to each other to be rotatable with respect to the other one. Accordingly, the first link 61 can rotate around a third rotation axis O 3 parallel to the horizontal direction, with respect to the second arm 13 .
- the third rotation axis O 3 is parallel to the second rotation axis O 2 .
- the rotation around the third rotation axis O 3 is performed by the driving of the third driving source 403 .
- the third driving source 403 is driven by a motor 403 M and a cable (not shown) and the motor 403 M is controlled by the robot control device through an electrically connected motor driver 303 .
- the third driving source 403 may be configured to transmit a driving force from the motor 403 M by a reduction gear (not shown) which is provided with the motor 403 M, and the reduction gear may be omitted.
- the first link 61 and the second link 62 are connected to each other through a joint 174 .
- the joint 174 has a mechanism of supporting one of the first link 61 and the second link 62 connected to each other to be rotatable with respect to the other one. Accordingly, the second link 62 can rotate around a fourth rotation axis O 4 parallel to a center axis direction of the first link 61 , with respect to the first link 61 (base 11 ).
- the fourth rotation axis O 4 is orthogonal to the third rotation axis O 3 .
- the rotation around the fourth rotation axis O 4 is performed by the driving of the fourth driving source 404 .
- the fourth driving source 404 is driven by a motor 404 M and a cable (not shown) and the motor 404 M is controlled by the robot control device through an electrically connected motor driver 304 .
- the fourth driving source 404 may be configured to transmit a driving force from the motor 404 M by a reduction gear (not shown) which is provided with the motor 404 M, and the reduction gear may be omitted.
- the fourth rotation axis O 4 may be parallel to an axis orthogonal to the third rotation axis O 3 or when the fourth rotation axis O 4 is not orthogonal to the third rotation axis O 3 , axial directions thereof may be different from each other.
- the second link 62 and the third link 63 are connected to each other through a joint 175 .
- the joint 175 has a mechanism of supporting one of the second link 62 and the third link 63 connected to each other to be rotatable with respect to the other one. Accordingly, the third link 63 can rotate around a fifth rotation axis O 5 which is orthogonal to a center axis direction of the second link 62 , with respect to the second link 62 .
- the fifth rotation axis O 5 is orthogonal to the fourth rotation axis O 4 .
- the rotation around the fifth rotation axis O 5 is performed by the driving of the fifth driving source 405 .
- the fifth driving source 405 is driven by a motor 405 M and a cable (not shown) and the motor 405 M is controlled by the robot control device through an electrically connected motor driver 305 .
- the fifth driving source 405 may be configured to transmit a driving force from the motor 405 M by a reduction gear (not shown) which is provided with the motor 405 M, and the reduction gear may be omitted.
- the fifth rotation axis O 5 may be parallel to an axis orthogonal to the fourth rotation axis O 4 or when the fifth rotation axis O 5 is not orthogonal to the fourth rotation axis O 4 , axial directions thereof may be different from each other.
- the third link 63 and the fourth link 64 are connected to each other through a joint 176 .
- the joint 176 has a mechanism of supporting one of the third link 63 and the fourth link 64 connected to each other to be rotatable with respect to the other one. Accordingly, the fourth link 64 can rotate around a sixth rotation axis O 6 with respect to the third link 63 .
- the sixth rotation axis O 6 is orthogonal to the fifth rotation axis O 5 .
- the rotation around the sixth rotation axis O 6 is performed by the driving of the sixth driving source 406 .
- the sixth driving source 406 is driven by a motor 406 M and a cable (not shown) and the motor 406 M is controlled by the robot control device through an electrically connected motor driver 306 .
- the sixth driving source 406 may be configured to transmit a driving force from the motor 406 M by a reduction gear (not shown) which is provided with the motor 406 M, or the reduction gear may be omitted.
- the fifth rotation axis O 5 may be parallel to an axis orthogonal to the fourth rotation axis O 4
- the sixth rotation axis O 6 may be parallel to an axis orthogonal to the fifth rotation axis O 5 , or when the sixth rotation axis O 6 is not orthogonal to the fifth rotation axis O 5 , axial directions thereof may be different from each other.
- the hand 91 which grasps a precision apparatus or a component such as a watch, is detachably attached to a distal end portion (end portion on the side opposite to the third link 63 ) of the fourth link 64 , as an end effector, for example.
- the driving of this hand 91 is controlled by the robot control device.
- the configuration of the hand 91 is not particularly limited, and a configuration of including a plurality of fingers is used.
- the robot 1 can perform each operation of transporting the precision apparatus or component by controlling the motions of the arms 12 to 14 while grasping the precision apparatus or component by the hand 91 .
- the third arm 14 is considered in a state where the third arm 14 is extended straight, that is, a state where the third arm 14 is extended to a maximum length, that is, a state where the fourth rotation axis O 4 and the sixth rotation axis O 6 coincide with each other or are parallel to each other.
- a length L 1 of the first arm 12 is set to be greater than a length L 2 of the second arm 13 .
- the length L 1 of the first arm 12 is a distance between the second rotation axis O 2 and a center line 521 of a bearing 52 rotatably supporting the first arm 12 , which extends in a vertical direction of FIG. 3 , when seen in the axial direction of the second rotation axis O 2 .
- the length L 2 of the second arm 13 is a distance between the second rotation axis O 2 and the third rotation axis O 3 , when seen in the axial direction of the second rotation axis O 2 .
- an angle q formed by the first arm 12 and the second arm 13 is configured so as to be set as 0°, when seen in the axial direction of the second rotation axis O 2 . That is, the first arm 12 and the second arm 13 are configured so as to overlap each other, when seen in the axial direction of the second rotation axis O 2 .
- the angle q formed by the first arm 12 and the second arm 13 is an angle formed by a linear line (center axis of the second arm 13 when seen in the axial direction of the second rotation axis O 2 ) 51 passing through the second rotation axis O 2 and the third rotation axis O 3 , and the first rotation axis O 1 , when seen in the axial direction of the second rotation axis O 2 .
- the distal end of the second arm 13 can be moved to a position rotated by 180° around the first rotation axis O 1 , through a state where the angle q is set as 0° (a state where the first arm 12 and the second arm 13 are overlapped each other) when seen in the axial direction of the second rotation axis O 2 (see FIGS. 7A to 7E ). That is, by not rotating the first arm 12 but rotating the second arm 13 , the distal end of the robot arm 5 (distal end of the fourth link 64 of the third arm 14 ) can be moved from a first position shown in FIG. 7A to a second position shown in FIG.
- a length L 3 of the third arm 14 is set to be greater than the length L 2 of the second arm 13 .
- the distal end of the third arm 14 that is, the distal end of the fourth link 64 can be protruded from the second arm 13 . Accordingly, it is possible to prevent the hand 91 from interfering with the first arm 12 and the second arm 13 .
- the length L 3 of the third arm 14 is the distance between the third rotation axis O 3 and the distal end of the third arm 14 (distal end of the fourth link 64 ), when seen in the axial direction of the second rotation axis O 2 .
- the state of the third arm 14 in this case is a state where the third arm 14 is extended to a maximum length, that is, a state where the fourth rotation axis O 4 and the sixth rotation axis O 6 coincide with each other or are parallel to each other, that is, a state where the third arm 14 is extended straight.
- the second arm 13 and the third arm 14 can overlap each other, when seen in the axial direction of the second rotation axis O 2 .
- first arm 12 , the second arm 13 , and the third arm 14 can overlap each other at the same time, when seen in the axial direction of the second rotation axis O 2 .
- the hand 91 distal end of the third arm 14
- the hand 91 distal end of the third arm 14
- the hand 91 can be moved to a position rotated by 180° around the first rotation axis O 1 , through a state where the angle q formed by the first arm 12 and the second arm 13 is set as 0° (a state where the first arm 12 and the second arm 13 overlap each other) when seen in the axial direction of the second rotation axis O 2 , by not rotating the first arm 12 but rotating the second arm 13 and the third arm 14 .
- this operation it is possible to drive the robot 1 with excellent efficiency and to reduce the space provided for avoiding interference with the robot 1 , and various advantages which will be described later are obtained.
- the base 11 is attached to the ceiling 101 so as to be positioned in the vicinity of a belt conveyor 71 .
- the belt conveyor 71 maybe a direct linear motion bearing used in belt driving or ball screw driving.
- a predetermined component 42 is transported by the belt conveyor 71 at the time of the operation.
- the robot 1 inserts a component 41 disposed in a component supply portion 72 to the component 42 which is transported by the belt conveyor 71 .
- the robot 1 grasps the component 41 disposed in the component supply portion 72 with the hand 91 .
- the hand 91 can be moved to a position rotated by 180° around the first rotation axis O 1 , that is, an insertion portion 73 , through a state where the angle q formed by the first arm 12 and the second arm 13 is set as 0° (a state where the first arm 12 and the second arm 13 overlap each other) when seen in the axial direction of the second rotation axis O 2 (see FIG. 7C ).
- the distal end of the second arm 13 and the hand 91 (distal end of the third arm 14 ) move on the straight line.
- the first arm 12 may also rotate as an operation of fine adjustment.
- the component 41 is inserted into the component 42 in the insertion portion 73 .
- the first arm 12 may also rotate as an operation of fine adjustment. Hereinafter, this operation is repeated.
- a width W of the installation space of the robot 1 can be set to be W 2 which is smaller than W 1 of the related art.
- W 2 is, for example, at least 80% smaller than W 1 .
- a height (height in the vertical direction) of the installation space of the robot 1 can be set to be smaller than a height of the related art, and specifically, the height thereof can be at least 80% smaller than the height of the related art.
- the hand 91 distal end of the third arm 14
- the hand 91 can be moved to a position rotated by 180° around the first rotation axis O 1 , through a state where the angle q formed by the first arm 12 and the second arm 13 is set as 0° (a state where the first arm 12 and the second arm 13 are overlapped each other) when seen in the axial direction of the second rotation axis O 2 .
- the motion of the robot 1 can be minimized. For example, it is possible to not rotate the first arm 12 or to decrease a rotation angle of the first arm 12 , and accordingly, it is possible to shorten the cycle time and to improve operation efficiency.
- FIG. 8 is a front view showing a second embodiment of a robot according to the invention.
- the length L 2 of the second arm 13 is set to be greater than the length L 1 of the first arm 12 . Accordingly, in the robot 1 A, the hand 91 can be moved further and the range of the vertical motion of the hand 91 can be increased.
- FIG. 9 is a perspective view showing a third embodiment of a robot according to the invention.
- FIG. 10 is a side view of the robot shown in FIG. 9 .
- the hand 91 is omitted in FIGS. 9 and 10 .
- the first arm 12 and the second arm 13 are respectively bent and apart thereof is protruded in a horizontal direction (left side of FIG. 10 ) with respect to the base 11 .
- the second link 62 of the third arm 14 includes a pair of supports 621 and 622 opposing each other and the third link 63 is connected between the supports 621 and 622 .
- FIG. 11 is a perspective view showing a fourth embodiment of a robot according to the invention.
- the hand 91 is omitted in FIG. 11 .
- the first arm 12 includes a pair of supports 121 and 122 opposing each other and the second arm 13 is connected between the supports 121 and 122 .
- the supports 121 and 122 are protruded in a horizontal direction (horizontal direction of FIG. 11 ) with respect to the base 11 .
- the second arm 13 includes a pair of supports 131 and 132 opposing each other and the third arm 14 is connected between the supports 131 and 132 .
- the second link 62 of the third arm 14 includes a pair of supports 621 and 622 opposing each other and the third link 63 is connected between the supports 621 and 622 .
- FIGS. 12A to 12C are diagrams for illustrating a motion of a robot according to the invention in a fifth embodiment.
- the fifth embodiment will be described, but the description is focused on different points from those of the first embodiment described above and the description of the same matters will be omitted.
- the description will be made using the robot 1 of the first embodiment, and this configuration can be applied to the robots 1 A to 1 C of the second to fourth embodiments and a robot 1 D of a seventh embodiment which will be described later, in the same manner.
- the distal end of the robot arm 5 can be moved from the first position to a third position having the equivalent height (position in the vertical direction) as that of the first position and to move the end portion thereof from the third position to the second position, and the reverse operation, that is, an operation of moving the distal end of the robot arm 5 from the second position to the third position and from the third position to the first position can also be performed.
- the robot 1 performs an operation of extracting a work 46 disposed on a shelf 76 , transporting the work to a stage 77 , and disposing the work on the stage 77 .
- the stage 77 is disposed on a position which is moved from the shelf 76 by 180° around the first rotation axis O 1 of the robot 1 .
- the shape of the work 46 is not particularly limited, but in the embodiment, a plate shape is used.
- a portion of the shelf 76 which is positioned on the upper portion and the lower portion of the work 46 is an obstacle when the robot 1 extracts the work 46 from the shelf 76 .
- the shelf has been described as an example of the obstacle at the time of the motion of the robot 1 , but the obstacle is not limited to the shelf and various components which are positioned on the upper portion and the lower portion of the work 46 such as an apparatus can be assumed, for example.
- the robot 1 grasps and lifts up the work 46 disposed on the shelf 76 with the hand 91 .
- the position of the distal end of the robot arm 5 shown in FIG. 12A is the first position.
- the robot 1 moves the work 46 in the horizontal direction while maintaining the height (position in the vertical direction) of the work 46 (distal end of the robot arm 5 ) constant, and extracts the work 46 from the shelf 76 .
- the robot 1 does not rotate the first arm 12 and rotates the second arm 13 and the first link 61 and the third link 63 of the third arm 14 .
- the distal end of the second arm 13 and the distal end of the robot arm 5 move on the straight line, when seen in the axial direction of the first rotation axis O 1 .
- the fine adjustment may be performed by rotating an arbitrary component among the first arm 12 , and the second link 62 and the fourth link 64 of the third arm 14 .
- the position of the distal end of the robot arm 5 shown in FIG. 12B is the third position.
- the heights (positions in the vertical direction) of the first position and the third position are equivalent to each other.
- the robot 1 transports the work 46 to the stage 77 and disposes the work on the stage 77 .
- the robot 1 does not rotate the first arm 12 and rotates the second arm 13 and the first link 61 and the third link 63 of the third arm 14 .
- the distal end of the second arm 13 and the distal end of the robot arm 5 move on the straight line, when seen in the axial direction of the first rotation axis O 1 .
- the fine adjustment may be performed by rotating an arbitrary component among the first arm 12 , and the second link 62 and the fourth link 64 of the third arm 14 .
- the position of the distal end of the robot arm 5 shown in FIG. 12C is the second position.
- the heights of the second position, and the first position and the third position may be equivalent to each other or may be different from each other.
- the robot 1 can perform the reverse operation, that is, an operation of transporting the work 46 disposed on the stage 77 to the shelf 76 and disposing the work on the shelf 76 .
- this operation will be described.
- the robot 1 grasps the work 46 disposed on the stage 77 with the hand 91 .
- the robot 1 transports the work 46 to the vicinity of the shelf 76 .
- the robot 1 does not rotate the first arm 12 and rotates the second arm 13 and the first link 61 and the third link 63 of the third arm 14 .
- the distal end of the second arm 13 and the distal end of the robot arm 5 move on the straight line, when seen in the axial direction of the first rotation axis O 1 .
- the fine adjustment may be performed by rotating an arbitrary component among the first arm 12 , and the second link 62 and the fourth link 64 of the third arm 14 .
- the robot 1 moves the work 46 in the horizontal direction while maintaining the height (position in the vertical direction) of the work 46 (distal end of the robot arm 5 ) constant, and moves the work 46 in the shelf 76 .
- the robot 1 does not rotate the first arm 12 and rotates the second arm 13 and the first link 61 and the third link 63 of the third arm 14 .
- the distal end of the second arm 13 and the distal end of the robot arm 5 move on the straight line, when seen in the axial direction of the first rotation axis O 1 .
- the fine adjustment maybe performed by rotating an arbitrary component among the first arm 12 , and the second link 62 and the fourth link 64 of the third arm 14 .
- the robot 1 lifts down and releases the work 46 and disposes the work on the shelf 76 .
- the robot 1 it is possible to extract the work 46 from the shelf 76 or dispose the work 46 on the shelf 76 while preventing interference with the shelf 76 .
- the distal end of the robot arm 5 can be moved to a wide range between the position of the first rotation axis O 1 and a position which is far apart from the first rotation axis O 1 , without rotating the first rotation axis O 1 , and accordingly, as shown in FIG. 12C , it is possible to transport the work 46 in a wide range from the portion close to the first rotation axis O 1 to a distant portion.
- FIGS. 13A and 13B are diagrams for illustrating a motion of a robot according to the invention in a sixth embodiment.
- the sixth embodiment will be described, but the description is focused on different points from those of the first embodiment described above and the description of the same matters will be omitted.
- the description will be made using the robot 1 of the first embodiment, and this configuration can be applied to the robots 1 A to 1 C of the second to fourth embodiments and a robot 1 D of a seventh embodiment which will be described later, in the same manner.
- the robot 1 performs an operation of transporting a work 47 disposed on a palette 78 to the shelf 76 and disposing the work on the shelf 76 .
- the palette 78 is disposed on a position which is moved from the shelf 76 by 180° around the first rotation axis O 1 of the robot 1 .
- the robot 1 grasps the work 47 disposed on the palette 78 with the hand 91 .
- the robot 1 transports the work 47 to a portion close to the shelf 76 , moves the work in the shelf 76 , lifts down, releases, and disposes the work 47 on the shelf 76 without rotating the first arm 12 .
- the robot of the related art when transporting the work 47 which is disposed in a region R 1 of the palette 78 on the shelf 76 side with respect to the first rotation axis O 1 , the first arm is not rotated, however, when transporting the work 47 which is disposed in a region R 2 on the opposite side to the shelf 76 , the first arm is rotated by 180°. Accordingly, in the robot of the related art, as shown in FIG. 13B , it is necessary to change a direction of the work 47 by 180° in the region R 1 and the region R 2 of the palette 78 .
- the robot 1 even when transporting the work 47 disposed in any one of the regions R 1 and R 2 of the palette 78 , the first arm 12 is not rotated, and accordingly, it is not necessary to perform complicated operation or control such as in the case of the robot of the related art, and it is possible to simplify the operation and control.
- FIG. 14 is a front view showing a seventh embodiment of a robot according to the invention.
- the first arm 12 is inclined with respect to the first rotation axis O 1 (vertical direction). Accordingly, the second rotation axis O 2 is separate from the first rotation axis O 1 by a distance L 4 .
- the distal end of the second arm 13 can be moved to a position further separated from the first rotation axis O 1 by the distance L 4 , compared to a case where the second rotation axis O 2 and the first rotation axis O 1 are not separate from each other, that is, the distal end of the robot arm 5 can be moved to a position further separated from the first rotation axis O 1 by the distance L 4 .
- FIG. 15 is a perspective view showing an eighth embodiment of a robot system according to the invention.
- FIG. 16 is a front view showing the eighth embodiment of the robot system according to the invention.
- FIG. 17 is a top view showing the eighth embodiment of the robot system according to the invention.
- FIG. 18 is a plan view showing the eighth embodiment of the robot system according to the invention.
- FIG. 19 is a perspective view showing the eighth embodiment of the robot system according to the invention.
- a robot cell 7 of the related art is shown as a reference so as to compare the size thereof with the size of a robot cell 6 of the embodiment. Operators with a height of 165 cm and a shoulder width of 60 cm are shown as a reference in the same manner.
- the robot system includes the robot and the robot cell where the robot is provided.
- the eighth embodiment will be described.
- the description will be made using the robot 1 B of the third embodiment, but it is not limited to the robot 1 B, and the embodiment can be applied in the same manner, as long as it is a robot having a smaller size than that of the robot cell 6 .
- FIG. 15 shows a case where the robot cell 7 is disposed beside the robot cell 6 .
- the robot cell 7 has a height of 1,860 mm, a width of 750 mm, and a depth of 850 mm. Accordingly, the installation area of the robot cell is 637,500 mm 2 and the volume of the robot cell 7 is 1,185,750,000 mm 3 .
- the robot cell 6 has a height of 1,600 mm, a width of 600 mm, and a depth of 600 mm. Accordingly, the installation area of the robot cell 6 is 360,000 mm 2 and the volume of the robot cell 6 is 576,000,000 mm 3 .
- the robot cell 7 when a part of cell for an operation of an operator is replaced with the robot cell 7 , the robot cell 7 is greater than the cell for an operation of an operator, and accordingly, the production line becomes long. Meanwhile, when apart of cell for an operation of an operator is replaced with the robot cell 6 , the size of the robot cell 6 is the same as the cell for an operation of an operator, and accordingly, it is possible to prevent a long production line.
- the installation area of the robot cell is less than 637,500 mm 2 which is the installation area of the robot cell 7 , it is possible to increase the number of production lines and to prevent a long production line.
- the installation area thereof By setting the installation area thereof to be equal to or smaller than 500,000 mm 2 , it is possible to further prevent a long production line.
- the installation area thereof By setting the installation area thereof to be equal to or smaller than 400,000 mm 2 , the installation area thereof becomes the installation area having substantially the same or equal to or smaller than the cell for an operation of an operator, and accordingly, it is possible to easily replace the cell for an operation of an operator to the robot cell.
- the height of the robot cell 6 is equal to or smaller than 1,700 mm. Accordingly, when the cell for an operation of an operator is replaced with the robot cell 6 , the height thereof is smaller than the height of the robot cell 7 , operators operating in other cells can be checked, as shown in FIG. 19 .
- the height of the robot cell 6 is preferably from 1,000 mm to 1,650 mm. Accordingly, it is possible to prevent an effect of vibration when the robot 1 B is operated in the robot cell 6 .
- a volume ratio of the robot 1 B with respect to the volume of the robot cell 6 is preferably from 0.01 to 0.5.
- the value of (volume of the robot 1 B/volume of the robot cell 6 ) is equal to or greater than 0.01. Accordingly, by increasing the volume ratio which is equal to or greater than 0.01, because the volume ratio of the related art is equal to or smaller than 0.01, it is possible to realize space saving of the robot cell 6 and to make the operations efficient.
- the volume ratio of the robot 1 B with respect to the volume of the robot cell 6 is from 0.01 to 0.1. Accordingly, it is possible to widen a movable range of the robot 1 B, compared to a case where the volume ratio is equal to or smaller than 0.5.
- the weight of the robot 1 B is preferably equal to or smaller than 20 kg. Accordingly, it is possible to prevent an effect of vibration when the robot 1 B is operated in the robot cell 6 .
- the robot 1 B includes the base 11 which is provided on the robot cell 6 , the first arm 12 which is provided on the base 11 so as to be rotatable around the first rotation axis O 1 , and the second arm 13 which is provided on the first arm 12 so as to be rotatable around the second rotation axis O 2 having an axial direction different from the axial direction of the first rotation axis O 1 , and the length of the first arm 12 is preferably greater than the length of the second arm 13 . Accordingly, it is possible to effectively perform the operation in a small space of the robot cell 6 .
- the number of rotation axes of the robot arm is six, but the invention is not limited thereto, and the number of rotation axes of the robot arm may be, for example, two, three, four, five, or seven or more. That is, in the embodiment, the number of links is six, but the invention is not limited thereto, and the number of links may be, for example, two, three, four, five, or seven or more.
- the first arm is configured with one link, but the invention is not limited thereto, and the first arm may be configured with the plurality of links, for example.
- the second arm is configured with one link, but the invention is not limited thereto, and the second arm may be configured with the plurality of links, for example.
- the third arm is configured with four links, but the invention is not limited thereto, and the third arm may be configured with one, two, three, or five or more links, for example.
- the third arm may be omitted.
- an end effector is detachably attached to the distal end of the second arm, for example.
- the number of robot arms is 1, but the invention is not limited thereto, and the number of robot arms may be two or more, for example. That is, the robot (robot main body) may be a robot having a plurality of arms such as a double arm robot.
- the robot may be a robot having other systems.
- a leg type walking (travel) robot including legs is used, for example.
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Abstract
A robot includes: a base; a first arm which is provided on the base so as to be rotatable around a first rotation axis; and a second arm which is provided on the first arm so as to be rotatable around a second rotation axis having an axial direction different from the axial direction of the first rotation axis, an angle formed by the first arm and the second arm is set as 0°, when seen in the axial direction of the second rotation axis, and the second arm does not interfere with an attachment surface where the base is provided, when the angle is 0°.
Description
- This application is a continuation of U.S. patent application Ser. No. 15/515,414, filed on Mar. 29, 2017, which is a U.S. National Phase Application of International Application No. PCT/JP2015/004877, filed on Sep. 25, 2015 and published in English as WO 2016/051746 A1 on Apr. 7, 2016, which claims priority to Japanese Patent Application No. 2014-236300, filed on Nov. 21, 2014 and No. 2014-202060, filed on Sep. 30, 2014. The entire disclosures of the above referenced applications are expressly incorporated by reference herein.
- The present invention relates to a robot and a robot system.
- In the related art, a robot including a robot arm has been known. As the robot arm, a plurality of arms (arm members) are connected to each other through joints, and a hand is mounted on the arm on an endmost side (lowermost stream) as an end effector, for example. The joint is driven by a motor and the arm rotates by the driving of the joint. The robot grasps a target with a hand, for example, moves the target to a predetermined place, and performs a predetermined operation such as assembly.
- As such a robot, JP-A-2014-46401 discloses a vertically articulated robot. In the robot disclosed in JP-A-2014-46401, a motion for moving a hand to a position rotated by 180° around a first rotation axis which is a rotation axis (rotation axis extending in a vertical direction) disposed furthest on the proximal side (uppermost stream) with respect to a base is performed by rotating a first arm which is an arm disposed furthest on the proximal side with respect to the base around the first rotation axis.
- In the robot disclosed in JP-A-2014-46401, when the hand is moved to the position rotated by 180° around the first rotation axis with respect to the base, it is necessary to provide a space having a size for avoiding interference of the robot.
- Currently, a production line in which a cell for an operation by a person is replaced with a robot cell for an operation by a robot has been increased. However, a size of the robot cell for an operation by a robot is generally larger than a size of the cell for an operation by a person and the production line becomes long when the cell for an operation by a person is simply replaced with the robot cell for an operation by a robot, and accordingly, the replacement is hardly executed depending on a production site.
- In addition, a height of the robot cell for an operation by a robot is great, and accordingly, when a plurality of robot cells are provided in a line, persons are hidden and accordingly, visibility is poor in the production site. When the height of the robot cell for an operation by a robot is great, the center of gravity of the robot cell becomes high and it is easily vibrated. Accordingly, the operation accuracy of the robot becomes poor and a risk of the robot cell falling down becomes high.
- An advantage of some aspects of the invention is to solve at least apart of the problems described above and the invention can be implemented as the following forms or application examples.
- A robot according to this application example of the invention includes: a base; a first arm which is provided on the base so as to be rotatable around a first rotation axis; and a second arm which is provided on the first arm so as to be rotatable around a second rotation axis having an axial direction different from the axial direction of the first rotation axis, in which an angle formed by the first arm and the second arm is set as 0°, when seen in the axial direction of the second rotation axis, and the second arm does not interfere with an attachment surface where the base is provided, when the angle is 0°.
- With this configuration, it is possible to reduce a space for avoiding interference of the robot, when the distal end of the second arm is moved to a position rotated by 180° around the first rotation axis.
- A robot according to this application example of the invention includes: a base; a first arm which is provided on the base so as to be rotatable around a first rotation axis; and a second arm which is provided on the first arm so as to be rotatable around a second rotation axis having an axial direction different from the axial direction of the first rotation axis, in which the first arm has a length which is greater than the length of the second arm.
- With this configuration, it is possible to reduce a space for avoiding interference of the robot, when the distal end of the second arm is moved to a position rotated by 180° around the first rotation axis.
- A robot according to this application example of the invention includes: a base; and a robot arm, in which the robot arm includes a first arm which is provided on the base so as to be rotatable around a first rotation axis, and a second arm which is provided on the first arm so as to be rotatable around a second rotation axis having an axial direction different from the axial direction of the first rotation axis, in which the distal end of the robot arm is moved from a first position to a second position which is rotated by 180° around the first rotation axis, through a state where an angle formed by the first arm and the second arm is set as 0° when seen in the axial direction of the second rotation axis, by not rotating the first arm but rotating the second arm.
- With this configuration, it is possible to reduce a space for avoiding interference of the robot, when the distal end of the robot arm is moved from the first position to the second position.
- In the robot according to the application example, it is preferable that when the distal end of the robot arm moves from the first position to the second position, the distal end of the robot arm moves on the straight line, when seen in the axial direction of the first rotation axis.
- With this configuration, it is possible to reduce a space for avoiding interference of the robot, when the distal end of the robot arm is moved from the first position to the second position.
- In the robot according to the application example, it is preferable that the distal end of the robot arm is moved from the first position to a third position having the same height as that of the first position and moves the distal end of the robot arm from the third position to the second position.
- With this configuration, it is possible to move a work piece which is disposed on the first position to the second position while preventing interference with an object, when an object exists on the upper portion and the lower portion in the first position.
- In the robot according to the application example, it is preferable that the distal end of the robot arm is moved from the second position to a third position having the same height as that of the first position and moves the distal end of the robot arm from the third position to the first position.
- With this configuration, it is possible to move a work piece which is disposed on the second position to the first position while preventing interference with an object, when an object exists on the upper portion and the lower portion in the first position.
- A robot according to this application example of the invention includes: a base; a first arm which is provided on the base so as to be rotatable around a first rotation axis; and a second arm which is provided on the first arm so as to be rotatable around a second rotation axis having an axial direction different from the axial direction of the first rotation axis, in which the first arm and the second arm are overlapped each other when seen in the axial direction of the second rotation axis.
- With this configuration, it is possible to reduce a space for avoiding interference of the robot, when the distal end of the second arm is moved to a position rotated by 180° around the first rotation axis.
- In the robot according to the application example, it is preferable that the second rotation axis is separate from the first rotation axis.
- With this configuration, it is possible to move the distal end of the second arm to a position separated from the first rotation axis, by an amount separated between the first rotation axis and the second rotation axis.
- In the robot according to the application example, it is preferable that the robot further includes a third arm which is provided on the second arm so as to be rotatable around a third rotation axis.
- With this configuration, it is possible to easily realize a more complicated motion.
- In the robot according to the application example, it is preferable that the axial direction of the third rotation axis and the axial direction of the second rotation axis are parallel with each other.
- With this configuration, it is possible to easily realize a more complicated motion.
- In the robot according to the application example, it is preferable that the third arm has a length which is greater than the length of the second arm.
- With this configuration, it is possible to cause the distal end of the third arm to be protruded from the second arm, when the second arm and the third arm overlap each other, when seen in the axial direction of the second rotation axis.
- In the robot according to the application example, it is preferable that the second arm and the third arm overlap each other when seen in the axial direction of the second rotation axis.
- With this configuration, it is possible to reduce a space for avoiding interference of the robot, when the distal end of the second arm is moved to a position rotated by 180° around the first rotation axis.
- In the robot according to the application example, it is preferable that the base is provided on a ceiling. With this configuration, it is possible to provide a robot which is installed on a ceiling.
- In the robot according to the application example, it is preferable that the third arm includes a first link which is provided on the second arm so as to be rotatable around the third rotation axis, a second link which is provided on the first link so as to be rotatable around a fourth rotation axis having an axial direction which is different from an axial direction of the third rotation axis, a third link which is provided on the second link so as to be rotatable around a fifth rotation axis having an axial direction which is different from an axial direction of the fourth rotation axis, and a fourth link which is provided on the third link so as to be rotatable around a sixth rotation axis having an axial direction which is different from an axial direction of the fifth rotation axis.
- With this configuration, it is possible to easily realize a more complicated motion.
- A robot system according to this application example of the invention includes: a robot; and a robot cell where the robot is provided, in which the robot cell has a height equal to or smaller than 1,700 mm.
- With this configuration, when the cell is replaced with the robot cell, the height thereof is smaller than the height of the cell of the related art, and accordingly, it is possible to check operators operating in other cells.
- In the robot system according to the application example, it is preferable that the height of the robot cell is from 1,000 mm to 1,650 mm.
- With this configuration, it is possible to prevent the effects of vibration when the robot is operated in the robot cell.
- In the robot system according to the application example, it is preferable that the robot cell has an installation area of less than 637,500 mm2.
- With this configuration, it is possible to increase the number of production lines and to prevent long production lines.
- In the robot system according to the application example, it is preferable that the installation area of the robot cell is equal to or smaller than 500,000 mm2.
- With this configuration, it is possible to further prevent a long production line.
- In the robot system according to the application example, it is preferable that the installation area of the robot cell is equal to or smaller than 400,000 mm2.
- With this configuration, the installation area of the robot cell becomes the installation area having substantially the same or equal to or smaller than the cell for an operation of an operator, and accordingly, it is possible to easily replace the cell for an operation of an operator to the robot cell.
- In the robot system according to the application example, it is preferable that a volume ratio of the robot with respect to a volume of the robot cell is from 0.01 to 0.5.
- With this configuration, by increasing the volume ratio which is equal to or greater than 0.01, because the volume ratio of the related art is equal to or smaller than 0.01, it is possible to realize space saving of the robot cell and to make the operations efficient.
- In the robot system according to the application example, it is preferable that the volume ratio of the robot with respect to the volume of the robot cell is from 0.01 to 0.1.
- With this configuration, it is possible to widen a movable range of the robot, compared to a case where the volume ratio is equal to or smaller than 0.5.
- In the robot system according to the application example, it is preferable that the robot has a weight equal to or smaller than 20 kg.
- With this configuration, it is possible to prevent an effect of vibration when the robot is operated in the robot cell.
- In the robot system according to the application example, it is preferable that the robot includes a base provided in the robot cell, a first arm which is provided on the base so as to be rotatable around a first rotation axis, and a second arm which is provided on the first arm so as to be rotatable around a second rotation axis having an axial direction different from the axial direction of the first rotation axis, and the first arm has a length which is greater than the length of the second arm.
- With this configuration, it is possible to effectively perform the operation in a small space such as the robot cell.
-
FIG. 1 is a perspective view showing a first embodiment of a robot according to the invention. -
FIG. 2 is a schematic diagram of the robot shown inFIG. 1 . -
FIG. 3 is a front view of the robot shown inFIG. 1 . -
FIG. 4 is a front view of the robot shown inFIG. 1 . -
FIG. 5 is a diagram for illustrating a motion at the time of an operation of the robot shown inFIG. 1 . -
FIG. 6 is a diagram for illustrating a motion at the time of an operation of the robot shown inFIG. 1 . -
FIG. 7A is a diagram for illustrating a motion at the time of an operation of the robot shown inFIG. 1 . -
FIG. 7B is a diagram for illustrating a motion at the time of an operation of the robot shown inFIG. 1 . -
FIG. 7C is a diagram for illustrating a motion at the time of an operation of the robot shown inFIG. 1 . -
FIG. 7D is a diagram for illustrating a motion at the time of an operation of the robot shown inFIG. 1 . -
FIG. 7E is a diagram for illustrating a motion at the time of an operation of the robot shown inFIG. 1 . -
FIG. 8 is a front view showing a second embodiment of a robot according to the invention. -
FIG. 9 is a perspective view showing a third embodiment of a robot according to the invention. -
FIG. 10 is a side view of the robot shown inFIG. 9 . -
FIG. 11 is a perspective view showing a fourth embodiment of a robot according to the invention. -
FIG. 12A is a diagram for illustrating a motion of a robot according to the invention in a fifth embodiment. -
FIG. 12B is a diagram for illustrating a motion of a robot according to the invention in a fifth embodiment. -
FIG. 12C is a diagram for illustrating a motion of a robot according to the invention in a fifth embodiment. -
FIG. 13A is a diagram for illustrating a motion of a robot according to the invention in a sixth embodiment. -
FIG. 13B is a diagram for illustrating a motion of a robot according to the invention in a sixth embodiment. -
FIG. 14 is a front view showing a seventh embodiment of a robot according to the invention. -
FIG. 15 is a perspective view showing an eighth embodiment of a robot system according to the invention. -
FIG. 16 is a front view showing the eighth embodiment of the robot system according to the invention. -
FIG. 17 is a top view showing the eighth embodiment of the robot system according to the invention. -
FIG. 18 is a plan view showing the eighth embodiment of the robot system according to the invention. -
FIG. 19 is a perspective view showing the eighth embodiment of the robot system according to the invention. - Hereinafter, a robot according to the invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
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FIG. 1 is a perspective view showing a first embodiment of a robot according to the invention.FIG. 2 is a schematic diagram of the robot shown inFIG. 1 .FIGS. 3 and 4 are front views of the robot shown inFIG. 1 .FIGS. 5, 6, and 7 are respectively diagrams for illustrating a motion at the time of an operation of the robot shown inFIG. 1 . - Hereinafter, for convenience of description, the upper side in
FIGS. 1, 2, 3 to 5, and 7 is described with a term “on” or an “upper portion” and the lower side thereof is described with a term “below” or a “lower portion” (the same also applies to a case ofFIGS. 8 to 14 of other embodiments), and the base side inFIGS. 1, 2, 3 to 5, and 7 is described with a term “proximal end” or “upstream” and the opposite side thereof (hand side) is described with a term “distal end” or “downstream” (the same also applies to a case ofFIGS. 8 to 14 of other embodiments). - A robot (industrial robot) 1 shown in
FIGS. 1 to 4 includes a robot main body (main body portion) 10 and a robot control device (control unit) (not shown) which controls an operation of the robot main body 10 (robot 1). Therobot 1, for example, can be used in a manufacturing step of manufacturing a precision instrument such as a watch. The robot control device may be embedded in the robot main body 10 (robot 1) or may be separate from the robotmain body 10. In addition, the robot control device, for example, can be configured with a personal computer (PC) in which a central processing unit (CPU) is embedded, for example. - The robot
main body 10 includes a base (support) 11 and arobot arm 5. Therobot arm 5 includes a first arm (first arm member) (arm portion) 12 including one link, a second arm (second arm member) (arm portion) 13 including one link, a third arm (third arm member) (arm portion) 14 including afirst link 61, asecond link 62, athird link 63, and a fourth link 64 (four links), afirst driving source 401, asecond driving source 402, athird driving source 403, afourth driving source 404, afifth driving source 405, and a sixth driving source 406 (six driving sources). The wrist is configured with thethird link 63 and thefourth link 64 of the third arm and an end effector such as ahand 91 or the like can be detachable from a distal end of thefourth link 64 of the third arm, for example (seeFIG. 1 ). That is, therobot 1 is a vertically articulated (six axes) robot in which thebase 11, thefirst arm 12, thesecond arm 13, thefirst link 61, thesecond link 62, thethird link 63, and thefourth link 64 are connected to each other in this order form the proximal side to the distal side. Hereinafter, thefirst arm 12, thesecond arm 13, and thethird arm 14 are also respectively referred to as the “arm”. In addition, thefirst link 61, thesecond link 62, thethird link 63, and thefourth link 64 are also respectively referred to as the “link”. Further, thefirst driving source 401, thesecond driving source 402, thethird driving source 403, thefourth driving source 404, thefifth driving source 405, and thesixth driving source 406 are also respectively referred to as the “driving source”. - As shown in
FIGS. 1, 2, and 3 , in a case where therobot 1 is a vertically articulated robot, thebase 11 is positioned on the uppermost side of the vertically articulated robot and is a portion which is fixed to (member which is attached to) anattachment surface 102 which is a lower surface of aceiling 101 of an installation space. The fixing method thereof is not particularly limited and a fixing method performed with a plurality of bolts can be used, for example. - A location for the base 11 attached to the
attachment surface 102 is not particularly limited, but in the embodiment, any portion of a plate-shapedflange 111 provided on the lower portion of thebase 11 and an upper surface of the base 11 can be used. - The portion where the
base 11 is fixed is not particularly limited to a ceiling of the installation space and in addition thereto, a wall of the installation space, a floor, or the ground is used, for example. - A first joint 171 which will be described later may be contained or not be contained in the
base 11. - The
first arm 12, thesecond arm 13, thefirst link 61, thesecond link 62, thethird link 63, and thefourth link 64 are respectively supported so as to be independently displaced with respect to thebase 11. - As shown in
FIGS. 1, 2, and 3 , thebase 11 and thefirst arm 12 are connected to each other through the joint 171. The joint 171 has a mechanism of supporting thefirst arm 12 connected to the base 11 to be rotatable with respect to the base. Accordingly, thefirst arm 12 can rotate around a first rotation axis O1 parallel to a vertical direction, with respect to thebase 11. The first rotation axis O1 coincides with a lower surface of theceiling 101 to which thebase 11 is attached, that is, a normal line of theattachment surface 102 of theceiling 101. The first rotation axis O1 is a rotation axis which is on the uppermost stream of therobot 1. The rotation around the first rotation axis O1 is performed by the driving of thefirst driving source 401 including amotor 401M. Thefirst driving source 401 is driven by themotor 401M and a cable (not shown) and thismotor 401M is controlled by the robot control device through an electrically connectedmotor driver 301. Thefirst driving source 401 may be configured to transmit a driving force of themotor 401M by a reduction gear (not shown) which is provided with themotor 401M, and the reduction gear may be omitted. - The
first arm 12 and thesecond arm 13 are connected to each other through a joint 172. The joint 172 has a mechanism of supporting one of thefirst arm 12 and thesecond arm 13 connected to each other to be rotatable with respect to the other one. Accordingly, thesecond arm 13 can rotate around a second rotation axis O2 parallel to a horizontal direction, with respect to thefirst arm 12. The second rotation axis O2 is orthogonal to the first rotation axis O1. The rotation around the second rotation axis O2 is performed by the driving of thesecond driving source 402 including amotor 402M. Thesecond driving source 402 is driven by themotor 402M and a cable (not shown) and thismotor 402M is controlled by the robot control device through an electrically connectedmotor driver 302. Thesecond driving source 402 may be configured to transmit a driving force from themotor 402M by a reduction gear (not shown) which is provided with themotor 402M, and the reduction gear may be omitted. The second rotation axis O2 may be parallel to an axis orthogonal to the first rotation axis O1 or when the second rotation axis O2 is not orthogonal to the first rotation axis O1, axial directions thereof may be different from each other. - The
second arm 13 and thefirst link 61 of thethird arm 14 are connected to each other through a joint 173. The joint 173 has a mechanism of supporting one of thesecond arm 13 and thefirst link 61 connected to each other to be rotatable with respect to the other one. Accordingly, thefirst link 61 can rotate around a third rotation axis O3 parallel to the horizontal direction, with respect to thesecond arm 13. The third rotation axis O3 is parallel to the second rotation axis O2. The rotation around the third rotation axis O3 is performed by the driving of thethird driving source 403. Thethird driving source 403 is driven by amotor 403M and a cable (not shown) and themotor 403M is controlled by the robot control device through an electrically connectedmotor driver 303. Thethird driving source 403 may be configured to transmit a driving force from themotor 403M by a reduction gear (not shown) which is provided with themotor 403M, and the reduction gear may be omitted. - The
first link 61 and thesecond link 62 are connected to each other through a joint 174. The joint 174 has a mechanism of supporting one of thefirst link 61 and thesecond link 62 connected to each other to be rotatable with respect to the other one. Accordingly, thesecond link 62 can rotate around a fourth rotation axis O4 parallel to a center axis direction of thefirst link 61, with respect to the first link 61 (base 11). The fourth rotation axis O4 is orthogonal to the third rotation axis O3. The rotation around the fourth rotation axis O4 is performed by the driving of thefourth driving source 404. Thefourth driving source 404 is driven by amotor 404M and a cable (not shown) and themotor 404M is controlled by the robot control device through an electrically connectedmotor driver 304. Thefourth driving source 404 may be configured to transmit a driving force from themotor 404M by a reduction gear (not shown) which is provided with themotor 404M, and the reduction gear may be omitted. The fourth rotation axis O4 may be parallel to an axis orthogonal to the third rotation axis O3 or when the fourth rotation axis O4 is not orthogonal to the third rotation axis O3, axial directions thereof may be different from each other. - The
second link 62 and thethird link 63 are connected to each other through a joint 175. The joint 175 has a mechanism of supporting one of thesecond link 62 and thethird link 63 connected to each other to be rotatable with respect to the other one. Accordingly, thethird link 63 can rotate around a fifth rotation axis O5 which is orthogonal to a center axis direction of thesecond link 62, with respect to thesecond link 62. The fifth rotation axis O5 is orthogonal to the fourth rotation axis O4. The rotation around the fifth rotation axis O5 is performed by the driving of thefifth driving source 405. Thefifth driving source 405 is driven by amotor 405M and a cable (not shown) and themotor 405M is controlled by the robot control device through an electrically connectedmotor driver 305. Thefifth driving source 405 may be configured to transmit a driving force from themotor 405M by a reduction gear (not shown) which is provided with themotor 405M, and the reduction gear may be omitted. The fifth rotation axis O5 may be parallel to an axis orthogonal to the fourth rotation axis O4 or when the fifth rotation axis O5 is not orthogonal to the fourth rotation axis O4, axial directions thereof may be different from each other. - The
third link 63 and thefourth link 64 are connected to each other through a joint 176. The joint 176 has a mechanism of supporting one of thethird link 63 and thefourth link 64 connected to each other to be rotatable with respect to the other one. Accordingly, thefourth link 64 can rotate around a sixth rotation axis O6 with respect to thethird link 63. The sixth rotation axis O6 is orthogonal to the fifth rotation axis O5. The rotation around the sixth rotation axis O6 is performed by the driving of thesixth driving source 406. Thesixth driving source 406 is driven by amotor 406M and a cable (not shown) and themotor 406M is controlled by the robot control device through an electrically connectedmotor driver 306. Thesixth driving source 406 may be configured to transmit a driving force from themotor 406M by a reduction gear (not shown) which is provided with themotor 406M, or the reduction gear may be omitted. The fifth rotation axis O5 may be parallel to an axis orthogonal to the fourth rotation axis O4, the sixth rotation axis O6 may be parallel to an axis orthogonal to the fifth rotation axis O5, or when the sixth rotation axis O6 is not orthogonal to the fifth rotation axis O5, axial directions thereof may be different from each other. - The
hand 91 which grasps a precision apparatus or a component such as a watch, is detachably attached to a distal end portion (end portion on the side opposite to the third link 63) of thefourth link 64, as an end effector, for example. The driving of thishand 91 is controlled by the robot control device. The configuration of thehand 91 is not particularly limited, and a configuration of including a plurality of fingers is used. Therobot 1 can perform each operation of transporting the precision apparatus or component by controlling the motions of thearms 12 to 14 while grasping the precision apparatus or component by thehand 91. - Next, a relationship between the
first arm 12, thesecond arm 13, and thethird arm 14 will be described, but the description will be made from various viewpoints by changing expressions. In addition, thethird arm 14 is considered in a state where thethird arm 14 is extended straight, that is, a state where thethird arm 14 is extended to a maximum length, that is, a state where the fourth rotation axis O4 and the sixth rotation axis O6 coincide with each other or are parallel to each other. - First, as shown in
FIG. 3 , a length L1 of thefirst arm 12 is set to be greater than a length L2 of thesecond arm 13. - Herein, the length L1 of the
first arm 12 is a distance between the second rotation axis O2 and acenter line 521 of abearing 52 rotatably supporting thefirst arm 12, which extends in a vertical direction ofFIG. 3 , when seen in the axial direction of the second rotation axis O2. - The length L2 of the
second arm 13 is a distance between the second rotation axis O2 and the third rotation axis O3, when seen in the axial direction of the second rotation axis O2. - As shown in
FIG. 4 , an angle q formed by thefirst arm 12 and thesecond arm 13 is configured so as to be set as 0°, when seen in the axial direction of the second rotation axis O2. That is, thefirst arm 12 and thesecond arm 13 are configured so as to overlap each other, when seen in the axial direction of the second rotation axis O2. - When an angle q of the
second arm 13 is 0°, that is, when thefirst arm 12 and thesecond arm 13 overlap each other, when seen in the axial direction of the second rotation axis O2, theattachment surface 102 of theceiling 101 on which thebase 11 is provided does not cause interference. - Herein, the angle q formed by the
first arm 12 and thesecond arm 13 is an angle formed by a linear line (center axis of thesecond arm 13 when seen in the axial direction of the second rotation axis O2) 51 passing through the second rotation axis O2 and the third rotation axis O3, and the first rotation axis O1, when seen in the axial direction of the second rotation axis O2. - By not rotating the
first arm 12 but rotating thesecond arm 13, the distal end of thesecond arm 13 can be moved to a position rotated by 180° around the first rotation axis O1, through a state where the angle q is set as 0° (a state where thefirst arm 12 and thesecond arm 13 are overlapped each other) when seen in the axial direction of the second rotation axis O2 (seeFIGS. 7A to 7E ). That is, by not rotating thefirst arm 12 but rotating thesecond arm 13, the distal end of the robot arm 5 (distal end of thefourth link 64 of the third arm 14) can be moved from a first position shown inFIG. 7A to a second position shown inFIG. 7E which is rotated by 180° around the first rotation axis O1, through a state where the angle q is set as 0° (seeFIGS. 7A to 7E ). Thefirst link 61, thesecond link 62, thethird link 63, and thefourth link 64 of thethird arm 14 respectively rotate, if necessary. - When moving the distal end of the
second arm 13 to a position rotated by 180° around the first rotation axis O1 (when moving the distal end of therobot arm 5 from the first position to the second position), the distal end of thesecond arm 13 and the distal end of therobot arm 5 are moved on the linear line, when seen in the axial direction of the first rotation axis O1. - A length L3 of the
third arm 14 is set to be greater than the length L2 of thesecond arm 13. - Accordingly, when the
second arm 13 and thethird arm 14 overlap each other, when seen in the axial direction of the second rotation axis O2, the distal end of thethird arm 14, that is, the distal end of thefourth link 64 can be protruded from thesecond arm 13. Accordingly, it is possible to prevent thehand 91 from interfering with thefirst arm 12 and thesecond arm 13. - Herein, as shown in
FIG. 4 , the length L3 of thethird arm 14 is the distance between the third rotation axis O3 and the distal end of the third arm 14 (distal end of the fourth link 64), when seen in the axial direction of the second rotation axis O2. The state of thethird arm 14 in this case is a state where thethird arm 14 is extended to a maximum length, that is, a state where the fourth rotation axis O4 and the sixth rotation axis O6 coincide with each other or are parallel to each other, that is, a state where thethird arm 14 is extended straight. - As shown in
FIG. 4 , thesecond arm 13 and thethird arm 14 can overlap each other, when seen in the axial direction of the second rotation axis O2. - That is, the
first arm 12, thesecond arm 13, and thethird arm 14 can overlap each other at the same time, when seen in the axial direction of the second rotation axis O2. - In the
robot 1, by satisfying the relationship described above, the hand 91 (distal end of the third arm 14) can be moved to a position rotated by 180° around the first rotation axis O1, through a state where the angle q formed by thefirst arm 12 and thesecond arm 13 is set as 0° (a state where thefirst arm 12 and thesecond arm 13 overlap each other) when seen in the axial direction of the second rotation axis O2, by not rotating thefirst arm 12 but rotating thesecond arm 13 and thethird arm 14. By using this operation, it is possible to drive therobot 1 with excellent efficiency and to reduce the space provided for avoiding interference with therobot 1, and various advantages which will be described later are obtained. - Next, operations such as the supply, removal, transportation, assembly, and the like regarding materials performed by the
robot 1 and an example of a motion of therobot 1 at the time of operation will be described. Herein, a motion of therobot 1 when therobot 1 performs an assembly operation of inserting a component (work) disposed in a component supply portion to a component (work) transported by a belt conveyor will be described. - As shown in
FIG. 6 , in therobot 1, thebase 11 is attached to theceiling 101 so as to be positioned in the vicinity of abelt conveyor 71. Thebelt conveyor 71 maybe a direct linear motion bearing used in belt driving or ball screw driving. - As shown in
FIGS. 5 and 6 , apredetermined component 42 is transported by thebelt conveyor 71 at the time of the operation. Therobot 1 inserts acomponent 41 disposed in acomponent supply portion 72 to thecomponent 42 which is transported by thebelt conveyor 71. - At that time, first, as shown in
FIG. 5 , therobot 1 grasps thecomponent 41 disposed in thecomponent supply portion 72 with thehand 91. - Next, as shown in
FIGS. 7A to 7E , by not rotating the first arm 12 (not performing an operation shown witharrows FIG. 6 ) but rotating thesecond arm 13 and the third arm 14 (performing an operation shown with anarrow 56 ofFIG. 6 ), thehand 91 can be moved to a position rotated by 180° around the first rotation axis O1, that is, aninsertion portion 73, through a state where the angle q formed by thefirst arm 12 and thesecond arm 13 is set as 0° (a state where thefirst arm 12 and thesecond arm 13 overlap each other) when seen in the axial direction of the second rotation axis O2 (seeFIG. 7C ). At that time, the distal end of thesecond arm 13 and the hand 91 (distal end of the third arm 14) move on the straight line. At that time, thefirst arm 12 may also rotate as an operation of fine adjustment. - As shown in
FIG. 5 , thecomponent 41 is inserted into thecomponent 42 in theinsertion portion 73. At that time, thefirst arm 12 may also rotate as an operation of fine adjustment. Hereinafter, this operation is repeated. - In the
robot 1, by not rotating thefirst arm 12 but rotating thesecond arm 13, thehand 91 can be moved to a position rotated by 180° around the first rotation axis O1, through a state where the angle q formed by thefirst arm 12 and thesecond arm 13 is set as 0° when seen in the axial direction of the second rotation axis O2, and accordingly, as shown inFIG. 6 , a width W of the installation space of therobot 1 can be set to be W2 which is smaller than W1 of the related art. W2 is, for example, at least 80% smaller than W1. In the same manner as described above, a height (height in the vertical direction) of the installation space of therobot 1 can be set to be smaller than a height of the related art, and specifically, the height thereof can be at least 80% smaller than the height of the related art. - As described above, in the
robot 1, by not rotating thefirst arm 12 but rotating thesecond arm 13 and thethird arm 14, the hand 91 (distal end of the third arm 14) can be moved to a position rotated by 180° around the first rotation axis O1, through a state where the angle q formed by thefirst arm 12 and thesecond arm 13 is set as 0° (a state where thefirst arm 12 and thesecond arm 13 are overlapped each other) when seen in the axial direction of the second rotation axis O2. - Accordingly, it is possible to reduce the space provided for avoiding interference with the
robot 1. - That is, first, it is possible to lower the
ceiling 101, and accordingly, the position of the center of gravity of therobot 1 is lowered and it is possible to prevent vibration which occurs due to a reaction force generated by the motion of therobot 1. - In addition, it is possible to reduce the working area of the
robot 1 in a width direction (direction of the production line) and accordingly, it is possible to dispose a large number ofrobots 1 along a production line by unit length, and to shorten the production line. - When the
hand 91 is moved, the motion of therobot 1 can be minimized. For example, it is possible to not rotate thefirst arm 12 or to decrease a rotation angle of thefirst arm 12, and accordingly, it is possible to shorten the cycle time and to improve operation efficiency. -
FIG. 8 is a front view showing a second embodiment of a robot according to the invention. - Hereinafter, the second embodiment will be described, but the description is focused on different points from those of the first embodiment described above and the description of the same matters will be omitted.
- As shown in
FIG. 8 , in arobot 1A of the second embodiment, the length L2 of thesecond arm 13 is set to be greater than the length L1 of thefirst arm 12. Accordingly, in therobot 1A, thehand 91 can be moved further and the range of the vertical motion of thehand 91 can be increased. - The same effects as those in the first embodiment described above can be exhibited even in the second embodiment.
-
FIG. 9 is a perspective view showing a third embodiment of a robot according to the invention.FIG. 10 is a side view of the robot shown inFIG. 9 . Thehand 91 is omitted inFIGS. 9 and 10 . - Hereinafter, the third embodiment will be described, but the description is focused on different points from those of the first embodiment described above and the description of the same matters will be omitted.
- As shown in
FIGS. 9 and 10 , in arobot 1B of the third embodiment, thefirst arm 12 and thesecond arm 13 are respectively bent and apart thereof is protruded in a horizontal direction (left side ofFIG. 10 ) with respect to thebase 11. - The
second link 62 of thethird arm 14 includes a pair ofsupports third link 63 is connected between thesupports - The same effects as those in the first embodiment described above can be exhibited even in the third embodiment.
-
FIG. 11 is a perspective view showing a fourth embodiment of a robot according to the invention. Thehand 91 is omitted inFIG. 11 . - Hereinafter, the fourth embodiment will be described, but the description is focused on different points from those of the first embodiment described above and the description of the same matters will be omitted.
- As shown in
FIG. 11 , in a robot 1C of the fourth embodiment, thefirst arm 12 includes a pair ofsupports second arm 13 is connected between thesupports supports FIG. 11 ) with respect to thebase 11. - In the same manner as described above, the
second arm 13 includes a pair ofsupports third arm 14 is connected between thesupports - The
second link 62 of thethird arm 14 includes a pair ofsupports third link 63 is connected between thesupports - The same effects as those in the first embodiment described above can be exhibited even in the fourth embodiment.
-
FIGS. 12A to 12C are diagrams for illustrating a motion of a robot according to the invention in a fifth embodiment. - Hereinafter, the fifth embodiment will be described, but the description is focused on different points from those of the first embodiment described above and the description of the same matters will be omitted. In the fifth embodiment, the description will be made using the
robot 1 of the first embodiment, and this configuration can be applied to therobots 1A to 1C of the second to fourth embodiments and arobot 1D of a seventh embodiment which will be described later, in the same manner. - In the fifth embodiment, in the
robot 1, the distal end of therobot arm 5 can be moved from the first position to a third position having the equivalent height (position in the vertical direction) as that of the first position and to move the end portion thereof from the third position to the second position, and the reverse operation, that is, an operation of moving the distal end of therobot arm 5 from the second position to the third position and from the third position to the first position can also be performed. As shown inFIGS. 12A to 12C , by using this function, therobot 1 performs an operation of extracting awork 46 disposed on ashelf 76, transporting the work to astage 77, and disposing the work on thestage 77. - The
stage 77 is disposed on a position which is moved from theshelf 76 by 180° around the first rotation axis O1 of therobot 1. - The shape of the
work 46 is not particularly limited, but in the embodiment, a plate shape is used. - A portion of the
shelf 76 which is positioned on the upper portion and the lower portion of thework 46 is an obstacle when therobot 1 extracts thework 46 from theshelf 76. In the embodiment, the shelf has been described as an example of the obstacle at the time of the motion of therobot 1, but the obstacle is not limited to the shelf and various components which are positioned on the upper portion and the lower portion of thework 46 such as an apparatus can be assumed, for example. - In this operation, first, as shown in
FIG. 12A , therobot 1 grasps and lifts up thework 46 disposed on theshelf 76 with thehand 91. The position of the distal end of therobot arm 5 shown inFIG. 12A is the first position. - Next, as shown in
FIG. 12B , therobot 1 moves thework 46 in the horizontal direction while maintaining the height (position in the vertical direction) of the work 46 (distal end of the robot arm 5) constant, and extracts thework 46 from theshelf 76. At that time, therobot 1 does not rotate thefirst arm 12 and rotates thesecond arm 13 and thefirst link 61 and thethird link 63 of thethird arm 14. Accordingly, the distal end of thesecond arm 13 and the distal end of therobot arm 5 move on the straight line, when seen in the axial direction of the first rotation axis O1. If necessary, the fine adjustment may be performed by rotating an arbitrary component among thefirst arm 12, and thesecond link 62 and thefourth link 64 of thethird arm 14. The position of the distal end of therobot arm 5 shown inFIG. 12B is the third position. The heights (positions in the vertical direction) of the first position and the third position are equivalent to each other. - Next, as shown in
FIG. 12C , therobot 1 transports thework 46 to thestage 77 and disposes the work on thestage 77. At that time, therobot 1 does not rotate thefirst arm 12 and rotates thesecond arm 13 and thefirst link 61 and thethird link 63 of thethird arm 14. Accordingly, the distal end of thesecond arm 13 and the distal end of therobot arm 5 move on the straight line, when seen in the axial direction of the first rotation axis O1. If necessary, the fine adjustment may be performed by rotating an arbitrary component among thefirst arm 12, and thesecond link 62 and thefourth link 64 of thethird arm 14. The position of the distal end of therobot arm 5 shown inFIG. 12C is the second position. The heights of the second position, and the first position and the third position may be equivalent to each other or may be different from each other. - The
robot 1 can perform the reverse operation, that is, an operation of transporting thework 46 disposed on thestage 77 to theshelf 76 and disposing the work on theshelf 76. Hereinafter, this operation will be described. - In this operation, first, as shown in
FIG. 12C , therobot 1 grasps thework 46 disposed on thestage 77 with thehand 91. - Next, as shown in
FIG. 12B , therobot 1 transports thework 46 to the vicinity of theshelf 76. At that time, therobot 1 does not rotate thefirst arm 12 and rotates thesecond arm 13 and thefirst link 61 and thethird link 63 of thethird arm 14. Accordingly, the distal end of thesecond arm 13 and the distal end of therobot arm 5 move on the straight line, when seen in the axial direction of the first rotation axis O1. If necessary, the fine adjustment may be performed by rotating an arbitrary component among thefirst arm 12, and thesecond link 62 and thefourth link 64 of thethird arm 14. - Next, as shown in
FIG. 12A , therobot 1 moves thework 46 in the horizontal direction while maintaining the height (position in the vertical direction) of the work 46 (distal end of the robot arm 5) constant, and moves thework 46 in theshelf 76. At that time, therobot 1 does not rotate thefirst arm 12 and rotates thesecond arm 13 and thefirst link 61 and thethird link 63 of thethird arm 14. Accordingly, the distal end of thesecond arm 13 and the distal end of therobot arm 5 move on the straight line, when seen in the axial direction of the first rotation axis O1. If necessary, the fine adjustment maybe performed by rotating an arbitrary component among thefirst arm 12, and thesecond link 62 and thefourth link 64 of thethird arm 14. Next, therobot 1 lifts down and releases thework 46 and disposes the work on theshelf 76. - As described above, in the
robot 1, it is possible to extract thework 46 from theshelf 76 or dispose thework 46 on theshelf 76 while preventing interference with theshelf 76. - The distal end of the
robot arm 5 can be moved to a wide range between the position of the first rotation axis O1 and a position which is far apart from the first rotation axis O1, without rotating the first rotation axis O1, and accordingly, as shown inFIG. 12C , it is possible to transport thework 46 in a wide range from the portion close to the first rotation axis O1 to a distant portion. - Since it is possible to move the distal end of the
robot arm 5 from one of the first position and the second position to the other position, without rotating thefirst arm 12, it is possible to decrease the area of the installation space of therobot 1. For example, when thework 46 has a long shape (large size) such as a substrate or a panel, it is possible to prevent an effect on the size of the installation space of therobot 1 due to the size of thework 46. -
FIGS. 13A and 13B are diagrams for illustrating a motion of a robot according to the invention in a sixth embodiment. - Hereinafter, the sixth embodiment will be described, but the description is focused on different points from those of the first embodiment described above and the description of the same matters will be omitted. In the sixth embodiment, the description will be made using the
robot 1 of the first embodiment, and this configuration can be applied to therobots 1A to 1C of the second to fourth embodiments and arobot 1D of a seventh embodiment which will be described later, in the same manner. - As shown in
FIG. 13A , in the sixth embodiment, therobot 1 performs an operation of transporting awork 47 disposed on apalette 78 to theshelf 76 and disposing the work on theshelf 76. - The
palette 78 is disposed on a position which is moved from theshelf 76 by 180° around the first rotation axis O1 of therobot 1. - In this operation, first, as shown in
FIG. 13A , therobot 1 grasps thework 47 disposed on thepalette 78 with thehand 91. - Next, in the same manner as in the fifth embodiment, the
robot 1 transports thework 47 to a portion close to theshelf 76, moves the work in theshelf 76, lifts down, releases, and disposes thework 47 on theshelf 76 without rotating thefirst arm 12. - Herein, in the robot of the related art, when transporting the
work 47 which is disposed in a region R1 of thepalette 78 on theshelf 76 side with respect to the first rotation axis O1, the first arm is not rotated, however, when transporting thework 47 which is disposed in a region R2 on the opposite side to theshelf 76, the first arm is rotated by 180°. Accordingly, in the robot of the related art, as shown inFIG. 13B , it is necessary to change a direction of thework 47 by 180° in the region R1 and the region R2 of thepalette 78. Alternatively, in the robot of the related art, when the directions of thework 47 coincide in the region R1 and the region R2 of thepalette 78, it is necessary to rotate the arm (link) on the distal end side by 180° to return the direction of thework 47 to the original direction, when transporting thework 47 which is disposed in the region R2 of thepalette 78. - With respect to this, in the
robot 1, even when transporting thework 47 disposed in any one of the regions R1 and R2 of thepalette 78, thefirst arm 12 is not rotated, and accordingly, it is not necessary to perform complicated operation or control such as in the case of the robot of the related art, and it is possible to simplify the operation and control. -
FIG. 14 is a front view showing a seventh embodiment of a robot according to the invention. - Hereinafter, the seventh embodiment will be described, but the description is focused on different points from those of the first embodiment described above and the description of the same matters will be omitted.
- As shown in
FIG. 14 , in arobot 1D of the seventh embodiment, thefirst arm 12 is inclined with respect to the first rotation axis O1 (vertical direction). Accordingly, the second rotation axis O2 is separate from the first rotation axis O1 by a distance L4. - In the
robot 1D, the distal end of thesecond arm 13 can be moved to a position further separated from the first rotation axis O1 by the distance L4, compared to a case where the second rotation axis O2 and the first rotation axis O1 are not separate from each other, that is, the distal end of therobot arm 5 can be moved to a position further separated from the first rotation axis O1 by the distance L4. - The same effects as those in the first embodiment described above can be exhibited even in the seventh embodiment.
-
FIG. 15 is a perspective view showing an eighth embodiment of a robot system according to the invention.FIG. 16 is a front view showing the eighth embodiment of the robot system according to the invention.FIG. 17 is a top view showing the eighth embodiment of the robot system according to the invention.FIG. 18 is a plan view showing the eighth embodiment of the robot system according to the invention.FIG. 19 is a perspective view showing the eighth embodiment of the robot system according to the invention. InFIGS. 15 to 19 , arobot cell 7 of the related art is shown as a reference so as to compare the size thereof with the size of arobot cell 6 of the embodiment. Operators with a height of 165 cm and a shoulder width of 60 cm are shown as a reference in the same manner. The robot system includes the robot and the robot cell where the robot is provided. - Hereinafter, the eighth embodiment will be described. In the eighth embodiment, the description will be made using the
robot 1B of the third embodiment, but it is not limited to therobot 1B, and the embodiment can be applied in the same manner, as long as it is a robot having a smaller size than that of therobot cell 6. -
FIG. 15 shows a case where therobot cell 7 is disposed beside therobot cell 6. As shown inFIGS. 16 and 17 , therobot cell 7 has a height of 1,860 mm, a width of 750 mm, and a depth of 850 mm. Accordingly, the installation area of the robot cell is 637,500 mm2 and the volume of therobot cell 7 is 1,185,750,000 mm3. - Meanwhile, the
robot cell 6 has a height of 1,600 mm, a width of 600 mm, and a depth of 600 mm. Accordingly, the installation area of therobot cell 6 is 360,000 mm2 and the volume of therobot cell 6 is 576,000,000 mm3. - As shown in
FIG. 18 , when a part of cell for an operation of an operator is replaced with therobot cell 7, therobot cell 7 is greater than the cell for an operation of an operator, and accordingly, the production line becomes long. Meanwhile, when apart of cell for an operation of an operator is replaced with therobot cell 6, the size of therobot cell 6 is the same as the cell for an operation of an operator, and accordingly, it is possible to prevent a long production line. - Specifically, by setting the installation area of the robot cell to be less than 637,500 mm2 which is the installation area of the
robot cell 7, it is possible to increase the number of production lines and to prevent a long production line. - By setting the installation area thereof to be equal to or smaller than 500,000 mm2, it is possible to further prevent a long production line.
- By setting the installation area thereof to be equal to or smaller than 400,000 mm2, the installation area thereof becomes the installation area having substantially the same or equal to or smaller than the cell for an operation of an operator, and accordingly, it is possible to easily replace the cell for an operation of an operator to the robot cell.
- The height of the
robot cell 6 is equal to or smaller than 1,700 mm. Accordingly, when the cell for an operation of an operator is replaced with therobot cell 6, the height thereof is smaller than the height of therobot cell 7, operators operating in other cells can be checked, as shown inFIG. 19 . - The height of the
robot cell 6 is preferably from 1,000 mm to 1,650 mm. Accordingly, it is possible to prevent an effect of vibration when therobot 1B is operated in therobot cell 6. - In the
robot cell 6, a volume ratio of therobot 1B with respect to the volume of the robot cell 6 (volume of therobot 1B/volume of the robot cell 6) is preferably from 0.01 to 0.5. For example, when the volume of therobot 1B is 7,000,000 mm3 and the volume of therobot cell 6 is 576,000,000 mm3, the value of (volume of therobot 1B/volume of the robot cell 6) is equal to or greater than 0.01. Accordingly, by increasing the volume ratio which is equal to or greater than 0.01, because the volume ratio of the related art is equal to or smaller than 0.01, it is possible to realize space saving of therobot cell 6 and to make the operations efficient. - In addition, in the
robot cell 6, the volume ratio of therobot 1B with respect to the volume of the robot cell 6 (volume of therobot 1B/volume of the robot cell 6) is from 0.01 to 0.1. Accordingly, it is possible to widen a movable range of therobot 1B, compared to a case where the volume ratio is equal to or smaller than 0.5. - In the
robot cell 6, the weight of therobot 1B is preferably equal to or smaller than 20 kg. Accordingly, it is possible to prevent an effect of vibration when therobot 1B is operated in therobot cell 6. - In the
robot cell 6, therobot 1B includes the base 11 which is provided on therobot cell 6, thefirst arm 12 which is provided on the base 11 so as to be rotatable around the first rotation axis O1, and thesecond arm 13 which is provided on thefirst arm 12 so as to be rotatable around the second rotation axis O2 having an axial direction different from the axial direction of the first rotation axis O1, and the length of thefirst arm 12 is preferably greater than the length of thesecond arm 13. Accordingly, it is possible to effectively perform the operation in a small space of therobot cell 6. - Hereinabove, the robot and the robot system according to the invention have been described based on the embodiments shown in the drawings, but the invention is not limited thereto, and configuration of each unit can be replaced with an arbitrary configuration having the same function. Other arbitrary components may be added.
- In the invention, two or more arbitrary configurations (features) among the embodiments may be combined with each other.
- In the embodiment, the number of rotation axes of the robot arm is six, but the invention is not limited thereto, and the number of rotation axes of the robot arm may be, for example, two, three, four, five, or seven or more. That is, in the embodiment, the number of links is six, but the invention is not limited thereto, and the number of links may be, for example, two, three, four, five, or seven or more.
- Specifically, in the embodiment, the first arm is configured with one link, but the invention is not limited thereto, and the first arm may be configured with the plurality of links, for example.
- In the embodiment, the second arm is configured with one link, but the invention is not limited thereto, and the second arm may be configured with the plurality of links, for example.
- In the embodiment, the third arm is configured with four links, but the invention is not limited thereto, and the third arm may be configured with one, two, three, or five or more links, for example.
- In the invention, the third arm may be omitted. In this case, an end effector is detachably attached to the distal end of the second arm, for example.
- In the embodiment, the number of robot arms is 1, but the invention is not limited thereto, and the number of robot arms may be two or more, for example. That is, the robot (robot main body) may be a robot having a plurality of arms such as a double arm robot.
- In the invention, the robot (robot main body) may be a robot having other systems. As a specific example, a leg type walking (travel) robot including legs is used, for example.
Claims (12)
1. A robot comprising:
a base;
a first arm which is provided on the base so as to be rotatable around a first rotation axis;
a second arm which is provided on the first arm so as to be rotatable around a second rotation axis having an axial direction different from the axial direction of the first rotation axis; and
a third arm which is provided on the second arm so as to be rotatable around a third rotation axis,
wherein the third arm includes:
a first link which is provided on the second arm so as to be rotatable around the third rotation axis;
a second link which is provided on the first link so as to be rotatable around a fourth rotation axis having an axial direction which is different from an axial direction of the third rotation axis;
a third link which is provided on the second link so as to be rotatable around a fifth rotation axis having an axial direction which is different from an axial direction of the fourth rotation axis; and
a fourth link which is provided on the third link so as to be rotatable around a sixth rotation axis having an axial direction which is different from an axial direction of the fifth rotation axis,
the first arm, the second arm, and the third arm overlap each other when seen in the axial direction of the second rotation axis, and
when the first arm, the second arm, and the third arm are overlapped, the fourth link is nearer to the first rotating axis than the second arm.
2. A robot comprising:
a base;
a first arm rotatably supported by the base to rotate about a first axis;
a second arm rotatably supported by the first arm to rotate about a second axis;
a third arm rotatably supported by the second arm to rotate around a third axis,
wherein, when the second arm rotates around the second axis, the third axis travels along a path that orbits the second axis.
3. The robot of claim 2 , further comprising a fourth arm rotatably supported by the third arm to rotate around a fourth axis, wherein, when the first arm, the second arm, the third arm, and the fourth arm are in a nested arrangement in which at least two of the arms are aligned laterally adjacent to each other, the fourth axis is coaxial with the first axis.
4. The robot of claim 2 , wherein the second arm is laterally offset from the first axis.
5. The robot of claim 2 , wherein when the second arm is maintained in a maximum axially extended state relative to the base, the third arm is configured to rotate the fourth arm 360 degrees around the third axis in a plane of the first axis and interference free of the first arm and the base.
6. The robot of claim 2 , wherein when the first arm, the second arm, and the third arm are in a nested arrangement such that at least two of the arms are aligned laterally adjacent to one another, the fourth arm extends along the first axis.
7. The robot of claim 2 , wherein when the first arm, the second arm, and the third arm are in a nested arrangement such that at least two of the arms are aligned laterally adjacent to one another, one of the at least two arms completely overlaps the other of the at least two arms in an axial direction of the second axis.
8. The robot of claim 2 , wherein when the first arm, the second arm, and the third arm are in a nested arrangement such that at least two of the arms are aligned laterally adjacent to one another, the first axis, second axis, third axis, and fourth axis are coplanar.
9. A robot comprising:
a base;
a primary arm supported by the base to rotate about a primary axis axially extending through the base such that a distal end of the primary arm follows a circular path radially offset from the primary axis; and
a secondary arm supported by the primary arm to rotate about a secondary axis orthogonal to the primary axis,
wherein a longitudinal axis along which the primary arm longitudinally extends is laterally offset from the primary axis, and
a length of the secondary arm is less than a length of the primary first arm such that the secondary arm rotates adjacent to the primary arm, through the primary axis, and free of interference with the base.
10. The robot of claim 9 , wherein when in a nested arrangement in which the primary arm and the secondary arm are aligned laterally adjacent to one another, a longitudinal axis of the second arm along which the secondary arm longitudinally extends is coplanar with the longitudinal axis of the primary arm.
11. The robot of claim 9 , wherein the secondary arm rotates three-hundred sixty degrees about the secondary axis.
12. The robot of claim 9 , wherein the secondary arm adjacently rotates relative to the primary arm such that the secondary arm moves in and out of a lateral profile of the primary arm when viewed in an axial direction of the secondary axis.
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PCT/JP2015/004877 WO2016051746A1 (en) | 2014-09-30 | 2015-09-25 | Robot and robot system |
US15/515,414 US10737378B2 (en) | 2014-09-30 | 2015-09-25 | Robot and robot system |
US15/884,663 US20180147719A1 (en) | 2014-09-30 | 2018-01-31 | Robot and robot system |
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EP (1) | EP3200960A4 (en) |
KR (1) | KR20170042754A (en) |
CN (1) | CN107073707B (en) |
RU (1) | RU2017106187A (en) |
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Cited By (2)
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US10195750B2 (en) * | 2015-03-31 | 2019-02-05 | Seiko Epson Corporation | Robot and robot system |
US10293479B2 (en) * | 2015-04-27 | 2019-05-21 | Seiko Epson Corporation | Robot and robot system |
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KR102451713B1 (en) | 2017-12-11 | 2022-10-05 | 삼성전자주식회사 | Gripper |
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KR102375523B1 (en) * | 2020-01-22 | 2022-03-18 | 한국원자력연구원 | Multi-radiation cancer treatment robot |
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- 2015-09-25 US US15/515,414 patent/US10737378B2/en active Active
- 2015-09-25 EP EP15847238.1A patent/EP3200960A4/en active Pending
- 2015-09-25 KR KR1020177007355A patent/KR20170042754A/en not_active Application Discontinuation
- 2015-09-25 WO PCT/JP2015/004877 patent/WO2016051746A1/en active Application Filing
- 2015-09-25 TW TW104131930A patent/TWI675728B/en active
- 2015-09-25 RU RU2017106187A patent/RU2017106187A/en unknown
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2018
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US10195750B2 (en) * | 2015-03-31 | 2019-02-05 | Seiko Epson Corporation | Robot and robot system |
US10293479B2 (en) * | 2015-04-27 | 2019-05-21 | Seiko Epson Corporation | Robot and robot system |
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RU2017106187A3 (en) | 2018-08-27 |
TW201617192A (en) | 2016-05-16 |
TWI675728B (en) | 2019-11-01 |
CN107073707B (en) | 2021-06-04 |
US20170225326A1 (en) | 2017-08-10 |
US10737378B2 (en) | 2020-08-11 |
EP3200960A1 (en) | 2017-08-09 |
KR20170042754A (en) | 2017-04-19 |
EP3200960A4 (en) | 2018-05-30 |
CN107073707A (en) | 2017-08-18 |
WO2016051746A1 (en) | 2016-04-07 |
RU2017106187A (en) | 2018-08-27 |
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