WO2023233859A1 - 工具交換装置、連結ユニット及びモジュールユニット - Google Patents
工具交換装置、連結ユニット及びモジュールユニット Download PDFInfo
- Publication number
- WO2023233859A1 WO2023233859A1 PCT/JP2023/015954 JP2023015954W WO2023233859A1 WO 2023233859 A1 WO2023233859 A1 WO 2023233859A1 JP 2023015954 W JP2023015954 W JP 2023015954W WO 2023233859 A1 WO2023233859 A1 WO 2023233859A1
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- WIPO (PCT)
- Prior art keywords
- main body
- fitting
- module
- unit
- connection unit
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J15/00—Gripping heads and other end effectors
- B25J15/04—Gripping heads and other end effectors with provision for the remote detachment or exchange of the head or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/0025—Means for supplying energy to the end effector
- B25J19/0029—Means for supplying energy to the end effector arranged within the different robot elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
- B25J19/0025—Means for supplying energy to the end effector
- B25J19/0029—Means for supplying energy to the end effector arranged within the different robot elements
- B25J19/0033—Means for supplying energy to the end effector arranged within the different robot elements with axial connectors in end effector flange
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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
Definitions
- the present invention relates to a tool changer, a connection unit, and a module unit.
- a device including a first connecting unit attached to the robot body side and a second connecting unit attached to the tool side is disclosed (for example, Patent Document 1 ).
- the protrusion provided on the connection surface of the first connection unit is inserted into the connection hole provided in the connection surface of the second connection unit, and with the connection surfaces in contact with each other, The first connection unit and the second connection unit are connected by the cam of the protrusion engaging with the engagement part on the inner surface of the connection hole.
- a removable module unit is installed depending on the purpose of use of the robot and the type of tool. For example, a cable or tube from the robot body is connected to the tool via the module unit. .
- cables, tubes, etc. are connected between the robot body and the tool using a module unit, and for example, electricity, water, air, etc. are passed from the robot body side to the tool side via the module unit. Supplied.
- FIG. 6 shows a schematic diagram for explaining an attachment structure for attaching the module unit 104 to the connection unit 100 in a conventional tool changer.
- one of the first connection unit and the second connection unit of the tool exchanger is shown as a connection unit 100.
- the connection unit 100 is provided with a module attachment part 102 on the side surface 101a of the connection unit main body 101, and a module unit 104 is detachably attached to the module attachment part 102.
- the connecting unit 100 is positioned by the first connecting surface 20 coming into contact with one connecting unit (not shown) and the positioning pin 28 being inserted into a hole provided corresponding to one connecting unit.
- the module mounting part 102 includes a plate-shaped cantilevered protrusion 105 extending in the circumferential direction on the side surface 101a of the connecting unit main body 101, and a connecting unit side step part 106 forming an L-shaped cross-sectional step with the cantilevered protruding part 105. is formed.
- a positioning through hole 115 for positioning the module unit 104 and a screw hole 113 into which a bolt 110 inserted through the module unit 104 is screwed are formed in the cantilever protrusion 105 so as to penetrate through its thickness. ing.
- the module unit 104 has a rectangular parallelepiped module body 109 with a predetermined thickness, and a connector 61 to which a cable, tube, etc. is connected is provided on one side of the module unit body 109. . Further, the module unit main body 109 has a module unit side step part 120 formed on a surface 109a shown as the lower surface in FIG. 6 and having a step-shaped cross section to which the module attachment part 102 can be detachably attached. The module unit main body 109 has a plurality of through holes 112 that penetrate through the thickness in the area where the module unit side stepped portion 120 is formed, and a positioning hole that is fitted into the positioning through hole 115 of the module mounting portion 102. A pin 121 is provided.
- the module unit 104 When attaching the module unit 104 to the module attachment part 102 of the connection unit 100, the module unit 104 is attached so that the module unit side stepped part 120 of the module unit 104 is engaged with the cantilever protrusion 105 of the module attachment part 102. It is placed in a holding state. At this time, the module unit 104 attaches to the module mounting portion 102 by fitting the positioning pin 121 provided in the formation area of the module unit side step portion 120 into the positioning through hole 115 formed in the cantilever protrusion 105. It is accurately positioned and temporarily fixed in a cantilevered state.
- the bolt 110 is communicated from the through hole 112 formed in the module unit 104 to the screw hole 113 of the cantilever protrusion 105, and the bolt 110 is screwed into the screw hole 113 of the cantilever protrusion 105. be done.
- the module unit 104 is fixed on the cantilever protrusion 105 of the module mounting portion 102 in a cantilever structure.
- the cantilever on which the module unit 104 is placed is attached so that it can withstand the weight of the module unit 104.
- the surface area of the protruding portion 105 needs to be increased, and the module mounting portion 102 becomes larger accordingly.
- the module mounting part 102 becomes larger, the module unit 104 fixed to the module mounting part 102 also becomes larger, and when used in a robot that works in a narrow space, the module unit 104 This may cause problems such as interference with peripheral devices.
- the increase in weight due to the enlargement of the module unit 104 may exceed the load capacity that can be used by the robot. Therefore, it is desired to reduce the size of the module unit 104.
- the present invention has been made in consideration of the above points, and it is possible to suppress damage to the fixed part due to external load more than before when the module unit is fixed to the module mounting part of the connecting unit main body. It is an object of the present invention to provide a tool changing device, a connection unit, and a module unit that can be used to change the size of the module unit.
- the tool changer according to the present invention includes a first connection unit that is attached to either the main body side or the tool side of the device, and a first connection unit that is attached to the other of the main body side or the tool side and is connectable to the first connection unit.
- a second connection unit a module mounting part provided on a side surface of at least one of the connection unit main bodies of the first connection unit and the second connection unit; and a cable.
- a module unit provided with a connector to which a tube can be connected and detachably attached to a side surface of the connection unit main body via the module attachment part, the module attachment part being attached to the side surface of the connection unit main body.
- the module unit has a first fitting part having a convex or concave cross section extending in the circumferential direction along the side surface, and the module unit has a second fitting part having a concave or convex cross section that can be fitted into the first fitting part.
- the first fitting portion or the second fitting portion having a concave cross section connects the second fitting portion or the first fitting portion having a convex cross section to the connection unit main body.
- a plurality of pins are connected to the first fitting part and the second fitting part which are held and fitted from the thickness direction perpendicular to the circumferential direction of the connecting unit body, and are fixed to the side surface of the connection unit main body.
- connection unit has a configuration that can be connected to one of the connection units attached to either the main body side or the tool side of the device, and is attached to the other of the main body side and the tool side.
- a connecting unit of a tool changer in which a connecting unit main body and a module unit provided on a side surface of the connecting unit main body and a connector to which a cable or a tube can be connected are attached to and detached from the side surface of the connecting unit main body.
- the module attachment part having a first fitting part having a convex or concave cross section and extending in the circumferential direction along the side surface of the connection unit main body;
- the first fitting portion has a configuration capable of fitting into a second fitting portion provided in the module unit and having a concave or convex cross section, and the first fitting portion or the second fitting portion has a concave cross section.
- the mating part holds the second mating part or the first mating part, which has a convex cross section, from the thickness direction perpendicular to the circumferential direction of the connection unit main body, and the first mating part and the mating part are fitted together.
- a plurality of pins are communicated with the second fitting part to fix the module unit to a side surface of the connection unit main body.
- the module unit according to the present invention includes a first connecting unit that is attached to either the main body side or the tool side of the device, and a first connecting unit that is attached to the other of the main body side or the tool side and connectable to the first connecting unit.
- a module unit main body is provided with a connector that is detachably attached to the side surface of the connection unit main body via a module attachment part provided on the side surface of the connection unit main body, and to which a cable or tube can be connected;
- the module unit main body has a cross section that can be fitted into a first fitting part provided in the module mounting part and having a convex or concave cross section and extending in the circumferential direction along the side surface of the connecting unit main body.
- It has a second fitting part having a concave or convex cross section, and the first fitting part or the second fitting part having a concave cross section is connected to the second fitting part or the first fitting part having a convex cross section.
- a plurality of pins are connected to the fitted first fitting part and the second fitting part by sandwiching the fitting part from the thickness direction orthogonal to the circumferential direction of the connecting unit main body, and Fixed to the side.
- the connecting unit main body and the module unit can be firmly fixed.
- the module unit is fixed to the holder, it is possible to suppress damage to the fixed part due to an external load more than before.
- the first fitting portion and the second fitting portion is sandwiched from the thickness direction, it is possible to downsize the module unit fixed to the module attachment portion of the connection unit main body.
- FIG. 1 is a schematic diagram showing the overall configuration of an industrial robot to which a tool changing device according to the present embodiment is applied. It is a schematic diagram showing the composition when a module unit is attached to a connection unit. It is a schematic diagram showing the composition when a module unit is removed from a connection unit.
- FIG. 3 is a cross-sectional view showing a cross-sectional configuration taken along line AA' in FIG. 2; It is a graph showing the results of a rigidity test.
- FIG. 2 is a schematic diagram for explaining a mounting structure for mounting a module unit to a connection unit in a conventional tool changer.
- FIG. 1 shows an example in which a tool changer 10 according to the present embodiment is used as a device in an industrial robot 1.
- the industrial robot 1 is installed on a base 8 parallel to the xy plane, and a tool 16 is attached to the tip of an arm 12 via a tool changer 10.
- the industrial robot 1 moves the arm 12 in the x direction, the y direction, and the z direction in the height direction, which is the normal direction of the It has a configuration that allows the mounted tool 16 to be moved to a desired position.
- the tool changer 10 includes a first connecting unit 14a fixed to the tip of the arm 12 of an industrial robot 1 serving as a main body, and a first module unit detachably fixed to the first connecting unit 14a. 50a, a second connection unit 14b fixed to the tool 16, and a second module unit 50b detachably fixed to the second connection unit 14b.
- the first connection unit 14a and the second connection unit 14b have plate-shaped connection unit bodies 13 and 15 that are made of metal such as aluminum and have a predetermined thickness.
- the connection unit body 13 of the first connection unit 14a has a first connection surface 20, and the connection unit body 15 of the second connection unit 14b has a second connection surface 24.
- the first connection unit 14a is connected such that the first connection surface 20 contacts the second connection surface 24 of the second connection unit 14b.
- the first connecting surface 20 and the first fixing surface 17 facing each other are removably fastened to the tip of the arm 12 by bolts (not shown).
- the first connecting unit 14a is a first module unit to which a cable 54 routed from the industrial robot 1 or other peripheral equipment is connected to the side surface between the first connecting surface 20 and the first fixing surface 17. 50a is detachably fixed.
- the first module unit 50a is provided with a first connection connector 52 that can be connected to a second module unit 50b, which will be described later, when the first connection unit 14a and the second connection unit 14b are connected.
- the second connecting surface 24 and the second fixing surface 19 facing each other are removably fastened to the tool 16 by bolts (not shown).
- a second module unit 50b is detachably fixed to the side surface of the second connection unit 14b between the second connection surface 24 and the second fixation surface 19.
- one end of a cable 55 is connected to the tool 16, and the other end of the cable 55 is connected to the second module unit 50b.
- the second module unit 50b is arranged to face the first module unit 50a provided in the first connection unit 14a so as to be in contact with the first module unit 50a provided in the first connection unit 14a when the first connection unit 14a and the second connection unit 14b are connected. located at the location.
- the second module unit 50b is provided with a second connection connector 53 connectable to the first connection connector 52 of the first module unit 50a on the surface facing the first module unit 50a.
- the first connection connector 52 and the second connection connector 53 are connected when the first connection unit 14a and the second connection unit 14b are connected.
- the first connecting connector 52 and the second connecting connector 53 electrically connect the first module unit 50a and the second module unit 50b, for example.
- FIG. 1 shows an example in which a spot welding gun is used as the tool 16, and the spot welding gun is operated by electric power supplied from the tool changer 10 via a cable 55 to weld a workpiece (not shown). be able to. Note that when performing various types of work using such an industrial robot 1, although not shown in FIG. 1, a plurality of different types of tools with the second connection unit 14b attached are prepared on the mounting table. ing.
- a first connection unit 14a fixed to the arm 12 and a second connection unit 14b fixed to the tool 16 are separated, and another second connection unit to which another tool (not shown) is fixed is connected.
- the tool attached to the arm 12 can be freely replaced depending on the content of the work.
- the first module unit 50a and the second module unit 50b are, for example, a power supply module unit provided with only a power supply connector to which a cable is connected, or a signal module unit provided with only a signal connector. , a servo motor module unit equipped with a power supply connector and a signal connector, a water supply module unit equipped with a water supply connector to which a tube is connected instead of a cable, and an air supply module unit to which a tube is also connected.
- Various module units equipped with other connectors can be applied, such as an air supply module unit equipped with a connector for this purpose.
- the tool changer 10 uses the first module unit 50a and the second module unit 50b that have optimal connectors depending on the type of the tool 16, thereby supplying power to the tool 16, Transmission of signals, supply of water and air, etc. can be performed via the first module unit 50a and the second module unit 50b.
- cables 54 and 55 capable of supplying power are connected to the tool changer 10.
- a cable for transmitting and receiving control signals or a tube capable of supplying fluid such as air or water may be connected to the tool changer 10 in place of the cables 54, 55.
- the configurations of the first connecting connector 52 and the second connecting connector 53 are also appropriately changed to include signal pins, piping, and the like.
- connection unit and module unit 50a there is an attachment structure between the first connection unit 14a and the first module unit 50a, and an attachment structure between the second connection unit 14b and the second module unit 50b. Since they have the same mounting structure, the following description will focus on the mounting structure between the first connection unit 14a and the first module unit 50a.
- the first connection unit 14a will be simply referred to as a connection unit 14a
- the first module unit 50a will be simply referred to as a module unit 50a.
- a case will be described in which a servo motor module unit provided with a power supply connector and a signal transmission connector is applied.
- FIG. 2 is a schematic diagram showing the configuration when the module unit 50a is attached to the connection unit 14a.
- the connecting unit 14a has a plate-shaped connecting unit main body 13 having a predetermined thickness and a polygonal outer shape, and has an engaging portion 22 protruding from the first connecting surface 20 at the center of the connecting unit main body 13. is provided.
- the engaging portion 22 has an engaging mechanism including a cam.
- the connecting unit 14 a is provided with a plurality of positioning pins 28 protruding from the first connecting surface 20 around the engaging portion 22 .
- the plurality of positioning pins 28 are inserted into holes provided in the other connecting unit 14b when connecting the connecting unit 14a to a second connecting unit (hereinafter simply referred to as another connecting unit) 14b.
- the connecting unit 14a is positioned relative to the other connecting unit 14b.
- connection unit main body 13 is provided with a connector (electrical block (core contact type electrical contact using spring contact pins)) 23 consisting of a plurality of signal pins at a predetermined position on the first connection surface 20.
- a connector electrical block (core contact type electrical contact using spring contact pins)
- the connector 23 can be electrically connected to the connector of the other connecting unit 14b.
- the connecting unit 14a is separated from the other connecting unit 14b, the connector 23 is released from contact with the connector of the other connecting unit 14b.
- the connecting unit 14a is provided with a plurality of through holes 43 into which bolts (not shown) for fixing to the tip of the arm 12 are inserted.
- the connection unit 14a has a module attachment portion 56a formed on the side surface 13a disposed between the first connection surface 20 and the first fixing surface 17 of the connection unit main body 13, and the module attachment portion 56a is connected to the module unit through the module attachment portion 56a.
- 50a is provided.
- FIG. 2 in addition to the module unit 50a being attached to the module attachment part 56a provided on the side surface 13a of the connection unit body 13, there is also a module attachment part provided on the other side surface of the connection unit body 13. Another module unit 50c is also attached to 56b.
- FIG. 3 is a schematic diagram showing the configuration when the module unit 50a is removed from the connection unit 14a.
- the module attachment portion 56a includes a first fitting portion 57 whose longitudinal direction extends in the circumferential direction of the side surface 13a of the connection unit main body 13 and a convex cross-section, and a bolt 68a or shoulder bolt to be described later.
- a through hole 68c and an insertion hole 69c (FIG. 3) into which the 69a is inserted are provided.
- the first fitting portion 57 includes a plate-shaped protrusion 58a whose longitudinal direction extends in the circumferential direction of the side surface 13a of the connecting unit main body 13, and a plate-shaped protrusion 58a whose cross section is quadrilateral. , step portions 58b and 58c running parallel to each other in the circumferential direction with the protrusion 58a in between.
- the through hole 68c is formed in the protrusion 58a so as to penetrate through the thickness of the protrusion 58a, and is formed into which a bolt 68a can be inserted.
- the insertion hole 69c is formed in the protrusion 58a without penetrating the thickness of the protrusion 58a, and is formed so that the shoulder bolt 69a can be inserted therein.
- FIG. 2 shows an example in which a servo motor module unit provided with a motor power supply connector 61a and a coupling connector 52a, and a signal transmission connector 61b and a coupling connector 52b is applied as the module unit 50a.
- the module unit 50a has a rectangular parallelepiped module main body 60 with a predetermined thickness, and a power supply connector 61a and a coupling connector 52a, and a signal transmission connector are installed at predetermined locations on the module unit main body 60. 61b and a connecting connector 52b are provided.
- the first connection connector 52 shown in FIG. 1 is shown as a connection connector 52a for power feeding and a connection connector 52b for signal transmission.
- the connectors 61a and 61b are provided, for example, on a side surface 60a facing a second fitting part 62, which will be described later. are connected as follows.
- the module unit 50a is connected to a peripheral device via a cable 54 by connectors 61a and 61b, and can receive power supply and control signals from the peripheral device.
- the connecting connectors 52a and 52b are provided on a connecting surface 60b facing another module unit 50b attached to another connecting unit 14b.
- the connecting connectors 52a and 52b connect other modules attached to the other connecting unit 14b.
- the unit 50b is electrically connected to the corresponding power supply connection connector and signal reception connection connector (second connection connector 53 shown in FIG. 1). Note that the connection connectors 52a and 52b are released from contact with the second connection connector 53 of the other module unit 50b when the connection unit 14a is separated from the other connection unit 14b.
- a second fitting part 62 with a concave cross section that can fit into the first fitting part 57 is formed on a side surface 60c that is attached to the connection unit 14a.
- the second fitting portion 62 includes a first protruding end portion 64a and a second protruding end portion 64b whose longitudinal direction runs parallel to the circumferential direction of the side surface 60c of the module unit main body 60, and a module unit main body whose longitudinal direction is perpendicular to the circumferential direction. It has a groove 64c that extends in the circumferential direction and is sandwiched between the first protruding end 64a and the second protruding end 64b in the thickness direction of the groove 60.
- a hollow part 64d (FIG. 3) of the groove part 64c sandwiched between the first protruding end part 64a and the second protruding end part 64b running in parallel forms a protrusion having a quadrilateral cross section of the first fitting part 57. It is formed to have a quadrilateral cross section in accordance with the outer shape of the portion 58a.
- the second fitting part 62 is configured such that the protrusion 58a of the first fitting part 57 can fit into the hollow part 64d of the groove 64c sandwiched between the first protrusion 64a and the second protrusion 64b. has been done.
- the first protruding end portion 64a and the second protruding end portion 64b are thick plate-shaped protrusions, and when the protruding portion 58a of the first fitting portion 57 fits into the groove portion 64c, the first protruding end portion 64a and the second protruding end portion 64b The opposing inner surfaces of the second projecting end portions 64b are formed to abut against the opposing outer surfaces of the protruding portions 58a of the first fitting portions 57. Thereby, when the second fitting part 62 is fitted with the first fitting part 57, the first protruding end part 64a and the second protruding end part 64b connect the protruding part 58a of the first fitting part 57 to the connecting unit.
- the main body 13 and the module unit main body 60 are sandwiched and held from the thickness direction.
- the first protruding end portion 64a is provided with through holes 68b and 69b (FIG. 3) through which a bolt 68a or a shoulder bolt 69a (described later) is inserted, respectively, so as to pass through the thickness thereof.
- the through holes 68b and 69b formed in the first protruding end part 64a are inserted into the through hole 68c and the insertion hole 69c of the first fitting part 57.
- a hole is drilled in a position that communicates with each other.
- a screw hole 68d (FIG. 3) into which the bolt 68a inserted through the through holes 68b and 68c is screwed is provided in the second protruding end portion 64b so as to pass through its thickness.
- FIG. 4 is a sectional view taken along the line AA' in FIG. 2, showing the configuration when the module unit 50a is attached to the connection unit 14a.
- FIG. 2 FIG. 3, and FIG.
- a through hole 68b drilled, a through hole 68c drilled in the protrusion 58a of the first fitting part 57, and a screw hole 68d bored in the second protruding end 64b of the second fitting part 62.
- the first protruding end 64a of the second fitting part 62, the protruding part 58a of the first fitting part 57, and the second protruding end 64b of the second fitting part 62 are communicated with each other.
- the bolt 68a fixes the fitted first fitting part 57 and second fitting part 62.
- the bolt 68a has a head 70a, a threaded part 70b connected to the head 70a, and a threaded part 70b that has a smaller diameter than the threaded part 70b and is connected to the threaded part 70b. and a threaded portion 70c at the tip.
- the head 70a and threaded portion 70b of the bolt 68a are inserted into the through hole 68b of the first projecting end 64a, and the threaded portion 70b of the bolt 68a is inserted into the through hole 68c of the projecting portion 58a.
- a threaded portion 70c of a bolt 68a is screwed into a threaded hole 68d of the bolt 64b.
- the shoulder bolt 69a When the second fitting part 62 is fitted with the first fitting part 57, the shoulder bolt 69a is connected to a through hole 69b drilled in the first protruding end 64a of the second fitting part 62, and the first fitting part 69a. It is sequentially inserted into the insertion hole 69c formed in the protrusion 58a of the joint part 57, and is communicated with the first protrusion 64a of the second fitting part 62 and the protrusion 58a of the first fitting part 57. Thereby, the shoulder bolt 69a fixes the fitted first fitting part 57 and second fitting part 62.
- the shoulder bolt 69a has a head 71a, a cylindrical or cylindrical fitting body 71b connected to the head 71a, and a diameter smaller than the fitting body 71b and connected to the fitting body 71b. and a threaded portion 71c at the tip.
- the head 71a and the fitting body 71b of the shoulder bolt 69a are inserted into the through hole 69b in the first protrusion 64a, and the fitting body 71b of the shoulder bolt 69a is inserted into the fitting region of the insertion hole 69c in the protrusion 58a.
- the shoulder bolt 69a is inserted, and the threaded portion 71c of the shoulder bolt 69a is screwed into the screwing region of the insertion hole 69c.
- the shoulder bolt 69a provided with the fitting body part 71b is used, and the second fitting part 62 can be accurately positioned on the first fitting part 57 by the fitting body part 71b.
- the module unit 50a can accurately position the second fitting part 62 to the first fitting part 57 by the shoulder bolt 69a without providing a conventional positioning pin 121 (FIG. 6). Therefore, the positioning pin 121 can be made unnecessary.
- the module unit 50a can be easily attached to and removed from the connection unit 14a because the second fitting part 62 can be accurately positioned in the first fitting part 57 by simply screwing the shoulder bolt 69a. can be done.
- the screwing length H1 of the threaded portion 71c at the protrusion 58a of the first fitting portion 57 is longer than the length H1 of the threaded portion 71c at the protrusion 58a of the first fitting portion 67. It is selected to be larger than the fitting length H2 of 71b. As described above, in this embodiment, the locations where the first fitting part 57 and the second fitting part 62 are fixed with the shoulder bolts 69a are selected such that the screwing length H1>fitting length H2.
- the detachability of the shoulder bolt 69a from the first fitting part 57 and the second fitting part 62 is improved, and the first fitting part 57 and the second fitting part 62 are fitted and fixed with the shoulder bolt 69a.
- the fixing work can be done easily.
- the first connection unit 14a is attached to the arm 12 side of the industrial robot 1 serving as the main body of the device, and the second connection unit is attached to the tool 16 side. 14b, and a module attachment portion 56a is provided on the side surface of each of the connection unit bodies 13 and 15 of the first connection unit 14a and the second connection unit 14b.
- the first module unit 50a is detachably attached to the module attachment portion 56a of the first connection unit 14a
- the second module unit 50b is detachably attached to the module attachment portion 56a of the second connection unit 14b.
- the module mounting portion 56a is provided with a first fitting portion 57 having a convex cross section and extending in the circumferential direction along the side surfaces of the connecting unit bodies 13 and 15, and the first fitting portion 57 is provided with a convex cross-section.
- the module unit 50b is provided with a second fitting part 62 having a concave cross section and capable of fitting into the first fitting part 57.
- the second fitting portion 62 having a concave cross section connects the first fitting portion 57 having a convex cross section of the module mounting portion 56a.
- the second fitting portion 62 fits into the first fitting portion 57 while being held from the thickness direction perpendicular to the circumferential direction of the unit body 13 .
- the first module unit 50a is fixed to the side surface of the connection unit main body 13 with a plurality of bolts 68a and shoulder bolts 69a communicating with the fitted first fitting part 57 and second fitting part 62.
- the tool changer 10 has a configuration in which the first fitting part 57 and the second fitting part 62 can be held in the thickness direction, so that, for example, the connection unit body 13 and the first module unit 50a can be connected. , it can be fixed more firmly than the conventional cantilever structure. Therefore, in the tool changer 10, when the first module unit 50a is fixed to the connection unit main body 13, even if an external load is applied to the first module unit 50a, the first module unit 50a will not be cantilevered like the conventional cantilever structure. The external load does not concentrate only on the protruding portion 105 (FIG. 6), and the external load can be dispersed at the fixed locations of the first fitting portion 57 and the second fitting portion 62. Therefore, in the tool changing device 10, when the first module unit 50a is fixed to the connection unit main body 13, it is possible to suppress damage to the fixed portion due to an external load more than before.
- the first fitting part 57 and the second fitting part 62 are configured so that they can be held in the thickness direction. Even if the size of the protruding portion 58a of the fitting portion 57 and the protruding area of the first protruding end portion 64a and the second protruding end portion 64b of the second fitting portion 62 having a concave cross-section is suppressed, firm fixation can be achieved.
- the fixing location for fixing the first module unit 50a to the module attachment portion 56a of the connection unit main body 13 can be downsized, and the first module unit 50a itself can be downsized. Furthermore, in the tool changing device 10, since the first module unit 50a can be made smaller, the weight of the first module unit 50a can also be reduced.
- connection unit 14b and the second module unit 50b are also fixed by the first fitting part 57 and the second fitting part 62, similar to the mounting structure of the first connection unit 14a and the first module unit 50a. Therefore, the same effect as the above-described mounting structure of the first connection unit 14a and the first module unit 50a can be achieved.
- the second fitting portion 62 with a concave cross section of the module unit 50a is connected to the second fitting portion 62 with a convex cross section provided on the module mounting portion 56a of the connecting unit 14a.
- the first fitting part 57 was sandwiched from the thickness direction of the connecting unit 14a, and the fitted first fitting part 57 and second fitting part 62 were fixed with two bolts 68a and two shoulder bolts 69a.
- a rigidity test was conducted using the mounting structure of Example 1 as the mounting structure.
- the module unit 104 is held in a cantilever structure by the cantilever protrusion 105 provided on the module mounting part 102 of the connection unit 100, and the module unit 104 is held in a cantilever structure by the cantilever protrusion 105.
- a rigidity test was conducted using a conventional mounting structure fixed with bolts 110 as the mounting structure of Comparative Example 1.
- connection unit 14a had the same configuration as the connection unit 100 of Comparative Example 1 except for the configuration of the module attachment part 56a. Furthermore, the module unit 50a was also configured the same as the module unit 104 of Comparative Example 1 except for the configuration of the second fitting portion 62.
- the "displacement amount of Example 1" in FIG. 5 is when the distal end side of the module unit 50a is pulled upward and a predetermined moment is applied to the module unit 50a from the thickness direction. The results of measuring the displacement position in the thickness direction using a laser displacement meter are shown. Further, “hysteresis of Embodiment 1" in FIG. 5 is achieved by pulling the distal end side of the module unit 50a upward, applying a predetermined moment to the module unit 50a from the thickness direction, and then stopping applying the moment. 2 shows the results of measuring the displacement position of the upper surface of the module unit 50a in the thickness direction using a laser displacement meter.
- the "displacement amount of Comparative Example 1" in FIG. 5 indicates that the upper surface of the module unit 104 is The results of measuring the displacement position in the thickness direction using a laser displacement meter are shown. Moreover, “hysteresis of Comparative Example 1" in FIG. 5 is caused by pulling the distal end side of the module unit 104 upward, applying a predetermined moment to the module unit 104 from the thickness direction, and then stopping applying the moment. 2 shows the results of measuring the displacement position of the upper surface of the module unit 104 in the thickness direction using a laser displacement meter.
- the horizontal axis represents the moment
- the vertical axis represents the displacement of the gap formed. From FIG. 5, it was confirmed that in the mounting structure of Example 1, the displacement when a moment was applied and the displacement after the moment was applied were smaller than in the mounting structure of Comparative Example 1. . Therefore, the mounting structure of Example 1 can suppress damage to the fixed portion due to external loads more than the conventional mounting structure of Comparative Example 1.
- the first connection unit 14a is attached to the arm 12 side of the industrial robot 1, which is the main body side of the device, and the second connection unit 14b is attached to the tool 16.
- the present invention is not limited to this, and the second connection unit 14b may be attached to the arm 12 side of the industrial robot 1, which is the main body side of the device, and the first connection unit 14a may be attached to the tool 16. .
- the first fitting portions 57 are provided on the side surfaces of the connection unit bodies 13 and 15 of both the first connection unit 14a and the second connection unit 14b, respectively, and the first connection unit 14a and the second connection unit 14b are
- the tool changing device 10 has been described in which the second fitting portions 62 of the first module unit 50a and the second module unit 50b are fitted into the first fitting portions 57 of the two connecting units 14b
- the present invention is not limited to this.
- the first fitting portion 57 is provided only on the side surface of the connecting unit main body 13 of either one, and the other connecting unit main body is provided with a conventional cantilevered part.
- a cantilevered structure by the protrusion 105 may also be used. In this case, only the first module unit 50a attached to one of the connection unit main bodies 13 is provided with the second fitting part 62 that can fit into the first fitting part 57.
- the first fitting part 57 provided on the side surface of the connection unit main body 13 has a convex cross section
- the second fitting part 62 provided in the first module unit 50a and the second module unit 50b Although the case where the cross section is concave has been described, the present invention is not limited to this.
- the first fitting part 57 provided on the side surface of the connecting unit main body 13 has a concave cross section
- the second fitting part 62 provided in the first module unit 50a and the second module unit 50b has a convex cross section
- the bolt 68a and the shoulder bolt 69a are applied as the plurality of pins communicating with the fitted first fitting part and second fitting part, but the present invention
- the present invention is not limited to this, and for example, a shoulder bolt may be used instead of the bolt 68a, and the first fitting part and the second fitting part may be fixed using only the shoulder bolt.
- bolts may be applied, and the first fitting portion and the second fitting portion may be fixed using only the bolts.
- the first fitting portion having a convex cross section or a concave cross section extending circumferentially along the side surface of the connecting unit main body extends from one end of the side surface 13a of the connecting unit main body 13 to the other end.
- the first fitting portion 57 having a convex cross section extending in the circumferential direction is applied and is fitted to the second fitting portion 62 of the module unit 50a over the entire side surface 13a, the present invention is not limited to this. .
- a first fitting part with a convex or concave cross section extending in the circumferential direction is provided only in a partial area of the side surface 13a of the connecting unit main body 13, and a second fitting part with a concave or convex cross section provided on the module unit is provided.
- the configuration may be such that the fitting portion fits only in a partial area of the side surface 13a.
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Abstract
Description
図1は、本実施形態に係る工具交換装置10を、機器として産業用ロボット1に用いる例を示す。産業用ロボット1は、x-y平面に平行な基台8上に据え付けられており、アーム12の先端に工具交換装置10を介して工具16が装着されている。産業用ロボット1は、x方向と、y方向と、x-y平面の法線方向である高さ方向のz方向とにアーム12を移動させ、アーム12の先端に工具交換装置10を介して装着された工具16を所望の位置に移動可能な構成を有する。
上述した工具交換装置10において、第1連結ユニット14aと第1モジュールユニット50aの取付構造と、第2連結ユニット14bと第2モジュールユニット50bの取付構造とは、同じ取付構造であることから、ここでは、第1連結ユニット14aと第1モジュールユニット50aとの取付構造について着目して以下説明する。なお、以下、説明を簡単にするために、第1連結ユニット14aは単に連結ユニット14aと称し、第1モジュールユニット50aは単にモジュールユニット50aと称して説明する。また、モジュールユニット50aの例として、給電用のコネクタと信号送信用のコネクタとが設けられたサーボモータモジュールユニットを適用した場合について説明する。
本実施形態に係る工具交換装置10では、機器の本体となる産業用ロボット1のアーム12側に取り付けられる第1連結ユニット14aと、工具16側に取り付けられる第2連結ユニット14bとが連結可能な構成を有しており、これら第1連結ユニット14a及び第2連結ユニット14bの各連結ユニット本体13,15の側面にモジュール取付部56aがそれぞれ設けられている。第1連結ユニット14aのモジュール取付部56aには、第1モジュールユニット50aが着脱自在に取り付けられ、第2連結ユニット14bのモジュール取付部56aには、第2モジュールユニット50bが着脱自在に取り付けられる。
次に、図2~図4に示したように、モジュールユニット50aの断面凹状の第2嵌合部62が、連結ユニット14aのモジュール取付部56aに設けた断面凸状の第1嵌合部57を、連結ユニット14aの厚み方向から挟持し、嵌合した第1嵌合部57及び第2嵌合部62を2本のボルト68aと2本のショルダーボルト69aとで固定した取付構造を、実施例1の取付構造として剛性試験を行った。
なお、上述した実施形態においては、機器の本体側である産業用ロボット1のアーム12側に第1連結ユニット14aを取り付け、工具16に第2連結ユニット14bを取り付けた場合について説明したが、本発明はこれに限らず、機器の本体側である産業用ロボット1のアーム12側に第2連結ユニット14bを取り付け、工具16に第1連結ユニット14aを取り付けてもよい。
10 工具交換装置
12 アーム(本体)
13,15 連結ユニット本体
14a 第1連結ユニット(連結ユニット)
14b 第2連結ユニット(連結ユニット)
16 工具
50a 第1モジュールユニット(モジュールユニット)
50b 第2モジュールユニット(モジュールユニット)
57 第1嵌合部
61a,61b コネクタ
62 第2嵌合部
68a ボルト(ピン)
69a ショルダーボルト(ピン)
Claims (7)
- 機器の本体側と工具側のいずれか一方に取り付けられる第1連結ユニットと、
前記本体側と前記工具側の他方に取り付けられ、前記第1連結ユニットに連結可能な第2連結ユニットと、
を備える工具交換装置であって、
前記第1連結ユニット及び前記第2連結ユニットのうち、少なくともいずれか一方の連結ユニット本体の側面に設けられたモジュール取付部と、
ケーブル又はチューブが接続可能なコネクタが設けられ、かつ、前記モジュール取付部を介して前記連結ユニット本体の側面に着脱自在に取り付けられるモジュールユニットと、
を備え、
前記モジュール取付部は、
前記連結ユニット本体の側面に沿って周方向に延びた断面凸状又は断面凹状の第1嵌合部を有し、
前記モジュールユニットは、
前記第1嵌合部に嵌合可能な断面凹状又は断面凸状の第2嵌合部を有しており、断面凹状の前記第1嵌合部又は前記第2嵌合部が、断面凸状の前記第2嵌合部又は前記第1嵌合部を、前記連結ユニット本体の周方向と直交する厚み方向から挟持し、嵌合した前記第1嵌合部及び前記第2嵌合部に複数のピンが連通されて、前記連結ユニット本体の側面に固定される、
工具交換装置。 - 断面凹状の前記第1嵌合部又は前記第2嵌合部は、
断面凸状の前記第2嵌合部又は前記第1嵌合部の、前記連結ユニット本体の前記周方向に延びた板状の突部を、前記連結ユニット本体の前記周方向に延びた板状の第1突端部と第2突端部とによって、前記連結ユニット本体の前記厚さ方向から挟み込んで挟持する、
請求項1に記載の工具交換装置。 - 前記複数のピンには、ショルダーボルトを含み、
前記モジュールユニットは、前記ショルダーボルトにより前記モジュール取付部に対して位置決めされる、
請求項1に記載の工具交換装置。 - 前記ショルダーボルトは、頭部と、前記頭部に連設された円柱状又は円筒状のはめあい胴部と、前記はめあい胴部よりも小径で、かつ、前記はめあい胴部に連設されたネジ部とを備え、
前記はめあい胴部は、前記第1嵌合部及び前記第2嵌合部に連通し、
前記ネジ部は、断面凹状の前記第2嵌合部又は前記第1嵌合部で挟持される、断面凸状の前記第1嵌合部又は前記第2嵌合部に螺着する、
請求項3に記載の工具交換装置。 - 前記ショルダーボルトは、
断面凸状の前記第1嵌合部又は前記第2嵌合部での前記ネジ部の螺着長さが、断面凸状の前記第1嵌合部又は前記第2嵌合部での前記はめあい胴部のはめあい長さよりも大きく選定されている、
請求項4に記載の工具交換装置。 - 機器の本体側と工具側のいずれか一方に取り付けられる一方の連結ユニットに連結可能な構成を有し、かつ、前記本体側と前記工具側の他方に取り付けられる、工具交換装置の連結ユニットであって、
連結ユニット本体と、
前記連結ユニット本体の側面に設けられ、かつ、ケーブル又はチューブが接続可能なコネクタが設けられたモジュールユニットを前記連結ユニット本体の側面に着脱自在に取り付ける、モジュール取付部と、
を備え、
前記モジュール取付部は、
前記連結ユニット本体の側面に沿って周方向に延びた断面凸状又は断面凹状の第1嵌合部を有しており、前記第1嵌合部が前記モジュールユニットに設けられた断面凹状又は断面凸状の第2嵌合部に嵌合可能な構成を有し、断面凹状の前記第1嵌合部又は前記第2嵌合部が、断面凸状の前記第2嵌合部又は前記第1嵌合部を、前記連結ユニット本体の周方向と直交する厚み方向から挟持し、嵌合した前記第1嵌合部及び前記第2嵌合部に複数のピンが連通されて、前記連結ユニット本体の側面に前記モジュールユニットを固定させる、
連結ユニット。 - 機器の本体側と工具側のいずれか一方に取り付けられる第1連結ユニットと、
前記本体側と前記工具側の他方に取り付けられ、前記第1連結ユニットに連結可能な第2連結ユニットと、
を備える工具交換装置の、前記第1連結ユニット及び前記第2連結ユニットのうち、少なくともいずれか一方の連結ユニット本体の側面に着脱自在に取り付けられる、モジュールユニットであって、
前記連結ユニット本体の側面に設けられたモジュール取付部を介して前記連結ユニット本体の側面に着脱自在に取り付けられ、かつ、ケーブル又はチューブが接続可能なコネクタが設けられた、モジュールユニット本体を備え、
前記モジュールユニット本体は、
前記モジュール取付部に設けられた、前記連結ユニット本体の側面に沿って周方向に延びた断面凸状又は断面凹状の第1嵌合部に対して、嵌合可能な断面凹状又は断面凸状の第2嵌合部を有しており、断面凹状の前記第1嵌合部又は前記第2嵌合部が、断面凸状の前記第2嵌合部又は前記第1嵌合部を、前記連結ユニット本体の周方向と直交する厚み方向から挟持し、嵌合した前記第1嵌合部及び前記第2嵌合部に複数のピンが連通されて、前記連結ユニット本体の側面に固定される、
モジュールユニット。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH05301187A (ja) * | 1992-04-24 | 1993-11-16 | Nitta Ind Corp | 自動工具交換用カップラー |
JPH06787A (ja) * | 1992-06-18 | 1994-01-11 | Mishima Kosan Co Ltd | 自動工具交換装置 |
JP2014198347A (ja) * | 2013-03-29 | 2014-10-23 | ビー・エル・オートテック株式会社 | 工具交換装置用のマスター装置 |
JP2021084186A (ja) * | 2019-11-28 | 2021-06-03 | ニッタ株式会社 | 工具交換装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
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JPH05301187A (ja) * | 1992-04-24 | 1993-11-16 | Nitta Ind Corp | 自動工具交換用カップラー |
JPH06787A (ja) * | 1992-06-18 | 1994-01-11 | Mishima Kosan Co Ltd | 自動工具交換装置 |
JP2014198347A (ja) * | 2013-03-29 | 2014-10-23 | ビー・エル・オートテック株式会社 | 工具交換装置用のマスター装置 |
JP2021084186A (ja) * | 2019-11-28 | 2021-06-03 | ニッタ株式会社 | 工具交換装置 |
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