WO2023176605A1 - ワーク吸着装置 - Google Patents
ワーク吸着装置 Download PDFInfo
- Publication number
- WO2023176605A1 WO2023176605A1 PCT/JP2023/008700 JP2023008700W WO2023176605A1 WO 2023176605 A1 WO2023176605 A1 WO 2023176605A1 JP 2023008700 W JP2023008700 W JP 2023008700W WO 2023176605 A1 WO2023176605 A1 WO 2023176605A1
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- WO
- WIPO (PCT)
- Prior art keywords
- hole
- axial direction
- support rod
- piston
- ball body
- Prior art date
Links
- 230000007246 mechanism Effects 0.000 claims description 34
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 238000003780 insertion Methods 0.000 claims description 13
- 230000037431 insertion Effects 0.000 claims description 13
- 238000001179 sorption measurement Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
Classifications
-
- 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
- B25J15/06—Gripping heads and other end effectors with vacuum or magnetic holding means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/002—Magnetic work holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/061—Arrangements for positively actuating jaws with fluid drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J17/00—Joints
- B25J17/02—Wrist joints
- B25J17/0258—Two-dimensional joints
- B25J17/0275—Universal joints, e.g. Hooke, Cardan, ball joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J18/00—Arms
- B25J18/02—Arms extensible
Definitions
- the present invention relates to a workpiece adsorption device equipped with a magnetic chuck that adsorbs a workpiece using magnetic force.
- an electromagnet is provided within the housing, and a workpiece attraction surface extending in the horizontal direction perpendicular to the vertical direction is formed on the lower surface of the housing.
- This magnetic chuck is configured so that when an electromagnet is activated, a magnetic force is generated on the workpiece attraction surface so that the workpiece can be attracted to the workpiece attraction surface.
- the magnetic chuck can be moved vertically by a lifting device connected to the top surface of the housing.
- a cylinder hole is formed in the housing, and a piston is provided in the cylinder hole so as to be movable in the vertical direction.
- a permanent magnet is attached to the lower part of the piston, and the permanent magnet can move up and down in the cylinder hole together with the piston.
- a workpiece suction surface extending in a horizontal direction orthogonal to the vertical direction is formed at the lower end of this magnetic chuck, and a robot arm for moving the magnetic chuck in the vertical direction is connected to the upper end of the magnetic chuck.
- the magnetic chuck rotates around the axis of the joint and moves downward, the position where the workpiece suction surface suctions the upper surface of the workpiece shifts from a predetermined position. Furthermore, in a magnetic chuck in which the permanent magnet is movable within the frame, the vertical dimension is larger than the lateral dimension, so the amount of deviation also increases.
- the technical problem of the present invention is to provide a workpiece suction device that can suction the workpiece with the workpiece suction surface tracing a predetermined position on the workpiece top surface even when the top surface of the workpiece is inclined with respect to the workpiece suction surface. It is about providing.
- a work suction device includes a support rod part that is capable of reciprocating in a first axis direction and has a distal end and a proximal end at both ends in the movement direction, and a support rod part that has a distal end and a proximal end at both ends in the movement direction, and a support rod part that can reciprocate in the first axis direction.
- a rotating arm portion having one end and the other end thereof and one end rotatably connected to the distal end of the support rod portion through a first joint portion; and a casing having a distal end and a proximal end at both ends in the third axis direction.
- the chuck unit has a workpiece suction surface extending in a direction perpendicular to the third axis at the tip of the housing, and the first joint portion has a workpiece suction surface.
- the support rod part and the rotating arm part are mutually rotatable about the first center point
- the second joint part has a second center point.
- the rotary arm portion and the chuck unit are mutually rotatable about the second center point.
- the chuck unit includes a cylinder hole formed inside the housing and extending in the third axial direction, a chuck piston provided movably within the cylinder hole, and the chuck piston.
- a permanent magnet that is attached to the chuck piston and moves together with the chuck piston, and the permanent magnet moves the permanent magnet toward the distal end side of the housing in the third axis direction to move the workpiece to the It is capable of reciprocating between an adsorption position for adsorbing the workpiece on the adsorption surface and an adsorption release position for moving the permanent magnet toward the proximal end of the casing to release the adsorption of the workpiece.
- the first joint portion includes a first ball body having the first center point, and a first recess that slidably accommodates the first ball body
- the second joint portion includes a second ball body having the second center point, and a second recess that slidably accommodates the second ball body.
- the first ball body is attached to the support rod part, and the first recess is open at one end of the rotating arm part
- the first ball body is preferably attached to the support rod part.
- the second ball body is attached to the base end of the chuck unit, and the second recess is open to the other end of the rotating arm part.
- the rotating arm portion controls relative rotation between the first ball body accommodated in the first recess of the first joint portion and the first recess, and the rotation arm of the second joint portion. It has a first locking mechanism that can lock and unlock relative rotation between the second ball body housed in the second recess and the second recess.
- the rotating arm part has a first cover member attached to one end thereof and having a first through hole penetrating in the second axial direction, and a first cover member attached to the other end of the rotating arm part.
- a second cover member that is attached and has a second through hole that penetrates in the second axial direction, and the first lock mechanism section is formed on each of the first and second cover members.
- a first piston having a first hole provided therein and opening at one end side; and a second piston having a second hole movably provided in the second cylinder hole and opening at the other end side.
- a first pressure chamber formed on the other end side of the first cylinder hole in the second axial direction and partitioned by the first piston; and a first pressure chamber formed on the one end side of the second cylinder hole in the second axial direction.
- An inner space surrounded by the through hole and the first hole portion forms the first recess that accommodates the first ball body, and the inner space of the first ball body is formed on the inner surface of the first through hole.
- a first outer sliding contact surface is formed that slides on the outer surface of one end of the first ball body in the second axial direction.
- a first inner sliding surface is formed in contact with the second through hole, and the second through hole and the second hole communicate with each other in the second axial direction, and are surrounded by the second through hole and the second hole.
- the inner space forms the second recess that accommodates the second ball body, and the inner surface of the second through hole is in sliding contact with the outer surface of the second ball body on the other end side in the second axial direction.
- a second outer sliding contact surface is formed, and a second inner sliding contact surface is formed on the inner surface of the second hole portion, and the second inner sliding contact surface slides on the outer surface of the second ball body at one end side in the second axial direction.
- the first and second pistons are reciprocated in the second axial direction by supplying and discharging compressed air to and from the first and second pressure chambers of the first and second cylinder holes, respectively.
- Compressed air supplied to the first and second pressure chambers causes the first piston to move toward one end in the second axial direction, and the second piston to move toward the one end in the second axial direction.
- the first ball body is held between the first outer sliding contact surface and the first inner sliding contact surface, and the second outer sliding contact surface and the second The second ball body is held between the inner sliding surfaces, so that the rotating arm portion is locked from rotation with respect to each of the support rod portion and the chuck unit.
- the first outer sliding contact surface of the first through hole contacts an outer surface of the first ball body on one end side in the second axial direction than the first center point
- the first inner sliding surface of the hole contacts the outer surface of the first ball body on the other end side in the second axial direction than the first center point
- the first inner sliding surface of the hole contacts the second outer surface of the second through hole.
- the sliding contact surface is in contact with an outer surface of the second ball body on the other end side in the second axial direction than the second center point
- the second inner sliding contact surface of the second hole is in contact with the outer surface of the second ball body on the other end side in the second axis direction.
- the ball contacts the outer surface of the two-ball body on one end side in the second axial direction from the second center point.
- the first inner sliding surface of the first piston is formed into a conical surface whose inner diameter increases as it advances toward one end in the second axial direction
- the second inner sliding surface of the second piston The contact surface is formed into a conical surface whose inner diameter increases toward the other end in the second axial direction.
- the work suction device includes a plurality of the magnetic chucks according to any one of claims 5 to 8, and a support portion that reciprocally supports each support rod portion of the plurality of magnetic chucks.
- the support part has a plurality of through holes extending in a direction perpendicular to the first axis and through which each support rod part of the plurality of magnetic chucks is inserted so as to be individually reciprocating.
- An arm support member and a communication hole through which each of the support rod portions of the plurality of magnetic chucks are individually inserted, and is attached to the arm support member, and locks and unlocks the support rod portion with respect to the arm support member.
- each of the plurality of connecting portions having a second locking mechanism and the plurality of supporting rod portions, and coming into contact with one end of the connecting portion in the first axial direction by movement of the supporting rod portion.
- a plurality of retaining members for preventing the support rod portion from being removed from the through hole; and a plurality of retaining members provided between the connection portion and the support rod portion of each of the plurality of magnetic chucks; a plurality of spring members that urge each of the magnetic chucks toward the distal end side in the first axial direction with respect to the arm support member, and each of the support rod portions of the plurality of magnetic chucks is
- the first axes are arranged on the arm support member so that the first axes are parallel to each other and spaced apart from each other.
- the second locking mechanism section of the connecting section includes a third cylinder hole extending in the first axial direction and formed in the communication hole of the connecting section, and a third cylinder hole extending in the first axial direction and formed in the communicating hole of the connecting section.
- a brake pad having a pressing surface disposed opposite to a side surface of the support rod portion, and a brake pad movable in the first axis direction within the third cylinder hole, the brake pad having a pressing surface facing the side surface of the support rod portion, a third piston having an inclined surface disposed in the third cylinder hole on the radially outer side of the cylinder; a pressing member that receives a pressing force directed inward; and a third pressure chamber in which the third cylinder hole is defined by the third piston, and the third pressure chamber of the third cylinder hole
- the third piston can be reciprocated in the first axial direction by supplying and discharging compressed air to and from the third pressure chamber.
- the pressing member By moving the piston, the pressing member receives a pressing force directed radially inward from the inclined surface and presses the brake pad radially inward, and the pressing surface presses a side surface of the support rod portion. , whereby the support rod portion is locked with respect to the arm support member.
- the connecting portion has one end and the other end on both sides in the first axial direction, one end is attached to the arm support member, and the connecting portion has a connecting body in which the communicating hole is formed.
- the connecting body includes a fixing member that is attached to one end thereof and has an insertion hole that penetrates in the first axial direction and is inserted into the through hole of the arm support member, and the insertion hole includes: The support rod portion is inserted into the insertion hole and the communication hole in communication with the communication hole of the connection body, and the fixing member is inserted into the through hole of the arm support member. It is removably attached to the arm support member, whereby the connecting trunk is removably attached to the arm support member.
- the fixing member is attached to the arm support member in a state protruding from an end surface of the arm support member on one end side in the first axial direction, and the support rod portion has a proximal end thereof
- the retaining member is attached to the proximal end portion of the support rod portion in a state of protruding from one end in the first axial direction of the through hole of the fixing member, and the retaining member is attached to the inner diameter of the through hole of the fixing member.
- the arm support member is formed in a cylindrical shape having a diameter larger than that and smaller than the inner diameter of the through hole of the arm support member.
- the spring member is a compression spring disposed between the other end of the connecting body and the tip of the support rod.
- the workpiece suction device can suction the workpiece with the workpiece suction surface tracing a predetermined position on the workpiece top surface. can be provided.
- FIG. 1 is a front view of a work suction device according to an embodiment of the present invention.
- FIG. 3 is a side view of the workpiece suction device.
- FIG. 3 is a cross-sectional view of the work suction device taken along arrow III-III in FIG. 2;
- FIG. 3 is a front view of the magnetic check in an extended state with a connecting portion inserted therein;
- FIG. 5 is a sectional view of the magnetic check and the connecting portion corresponding to the VV arrow view in FIG. 4;
- It is a front view of a rotation arm part.
- FIG. 3 is a plan view of the rotating arm section.
- FIG. 7 is a cross-sectional view of the rotating arm section taken along arrow VIII-VIII in FIG. 6;
- FIG. 3 is an exploded perspective view of the rotating arm portion.
- FIG. 3 is a cross-sectional view of the rotating arm portion when the first and second joint portions are in a rotating state.
- FIG. 3 is a cross-sectional view of the chuck unit in which the permanent magnet has moved to the attraction position.
- FIG. 3 is a cross-sectional view of the chuck unit in which the permanent magnet has moved to the attraction release position.
- FIG. 7 is a front view of the connecting portion through which the support rod portion is inserted.
- 14 is a cross-sectional view of the support rod portion and the connecting portion corresponding to the XIV-XIV arrow view in FIG. 13.
- FIG. 15 is an enlarged sectional view of the connecting portion shown in FIG. 14.
- FIG. 14 is a cross-sectional view of the rotating arm portion when the first and second joint portions are in a rotating state.
- FIG. 3 is a cross-sectional view of the chuck unit in which the permanent magnet has moved to the attraction position.
- FIG. 7 is an explanatory diagram of the operation when the chuck unit suctions the workpiece when the upper surface of the workpiece is tilted upward to the right with respect to the workpiece suction surface.
- FIG. 7 is an explanatory diagram of the operation when the chuck unit suctions the workpiece when the upper surface of the workpiece is tilted downward to the right with respect to the workpiece suction surface.
- the workpiece suction device has a plurality of magnetic chucks, and the chuck unit of the magnetic chuck is described using an example in which a permanent magnet is movably provided within its housing.
- the workpiece suction device may have one magnetic chuck, and the magnetic chuck may have an electromagnet fixed within its housing.
- This workpiece suction device 1 includes a plurality of magnetic chucks 5 and a support section 70, and these magnetic chucks 5 are supported by the support section 70 so as to be able to reciprocate.
- four magnetic chucks 5 are provided for the support part 70, and the support part 70 is connected to, for example, a tip arm of a robot, a lifting machine, etc., and the entire workpiece suction device 1 is connected to the support part 70. It is movable in a direction perpendicular to the arm support member 71 of 70 (hereinafter sometimes referred to as "first axis L1 direction").
- the magnetic chuck 5 is capable of reciprocating in the direction of the first axis L1, and has a support rod portion 6 having a distal end 6a and a proximal end 6b at both ends in the direction of movement, and a supporting rod portion 6 in the direction of the second axis L2.
- a rotating arm part 20 having a base end 20b (one end) and a distal end 20a (other end) at both ends thereof, and a base end 20b rotatably connected to the distal end 6a of the support rod part 6 by a first joint part 10; , has a housing 51 having a distal end 51a and a proximal end 51b at both ends in the third axis L3 direction, and the proximal end 51b of the housing 51 is rotatable at the distal end 20a of the rotating arm section 20 at the second joint section 40. and a chuck unit 50 connected to the chuck unit 50 for attracting the workpiece by magnetic force.
- the magnetic chuck 5 includes, from the base end side to the distal end side in the first axis L1 direction, a support rod part 6, a first joint part 10, a rotating arm part 20, and a second joint part. 40 and a chuck unit 50. Note that FIG. 5 shows a state in which the support rod portion 6 is inserted into a connecting portion 75, which will be described later.
- the support rod portion 6 is formed into an elongated columnar shape extending along the first axis L1 direction.
- a retaining member 3, which will be described later, is screwed onto the base end 6b of the support rod portion 6, and a connecting nut 2 is screwed onto the distal end 6a of the support rod portion 6.
- the first joint portion 10 includes a first ball body 11 and a first recess 12 that slidably accommodates the first ball body 11. has been done.
- the first joint part has a first center point S1 as its center, and the support rod part 6 and the rotating arm part 20 are connected to each other so as to be rotatable about the first center point S1. ing.
- the first ball body 11 is formed in a spherical shape, and the base end side of the first ball body 11 in the first axis L1 direction is screwed into the connecting nut 2, and the first ball body 11 is attached to the connecting nut 2 by screwing.
- the center point S1 is located on the first axis L1.
- the first recess 12 is open at the base end 6a of the rotating arm portion 20 in the extending direction (second axis L2 direction).
- the first recess 12 is connected to the first through hole 22 of the first cover member 21 attached to the base end 20b of the rotating arm 20, and the first through hole 22 of the rotating arm 20.
- a first hole 24 that opens on the base end side (one end side) in the second axis L2 direction of the first piston 23 provided inside the base end side of the portion 20,
- the first through hole 22 and the first hole 24 communicate in the direction of the second axis L2, and the inner space 26 surrounded by the first through hole 22 and the first hole 24 has a first through hole 22 and a first hole 24 that accommodate the first ball body 11. 1 recess 12 is formed.
- the first cover member 21 is formed into a plate shape, and the outer peripheral portion of the first cover member 21 is fixed to the base end 20b of the rotating arm portion 20 with fastening means such as a plurality of bolts 25. ing.
- a first through hole 22 is formed in the center of the first cover member 21 and extends in the direction of the second axis L2.
- the first through hole 22 is open at both ends of the first cover member 21 in the second axis L2 direction, and its inner surface extends annularly around the second axis L2 and extends along the outer surface of the first ball body 11 on the base end side.
- a first outer sliding contact surface 22a that comes into sliding contact is formed.
- the first outer sliding contact surface 22a contacts the outer surface of the first ball body 11 on the proximal side of the first center point S1 in the second axis L2 direction.
- the first hole 24 of the first piston 23 is formed in a hemispherical shape recessed from the base end side toward the distal end side in the second axis L2 direction, and the inner surface of the first hole portion 24 is A first inner sliding surface 24a that slides on the outer surface of the first ball body 11 on the tip side is formed.
- the first inner sliding surface 24a is formed into a conical surface whose inner diameter increases as it advances toward the base end, and is an outer surface on the distal side in the second axis L2 direction from the first center point S1 of the first ball body 11. come into contact with.
- the first ball body 11 is rotatably supported within the first recess 12, so that the support rod portion 6 and the rotating arm portion 20 are They are mutually rotatable about the first center point S1 of the first ball body 11. Note that details of the first piston 23 will be described later.
- the rotating arm portion 20 is formed into a cylindrical shape extending in the second axis L2 direction, as shown in FIGS. 6-10.
- An arm through hole 27 penetrating in the direction of the second axis L2 is formed inside the rotating arm section 20, and a first cylinder hole 28 is formed inside each of the base end side and the distal end side of the rotating arm section 20. and a second cylinder hole 29 are formed.
- the first and second cylinder holes 28 and 29 have the same inner diameter and the same depth, and are larger than the inner diameter of the arm through hole 27.
- a first piston 23 is movably provided in the first cylinder hole 28, and a second piston 30 is movably provided in the second cylinder hole 29.
- the depth of the first cylinder hole 28 is such that when the first inner sliding surface 24a of the first piston 23 is in contact with the outer surface of the first ball body 11,
- the size is such that a gap 31 is formed between the cylinder hole 28 and the bottom surface of the cylinder hole 28 .
- the first piston 23 retreats through this gap 31 toward the distal end side, the first ball body 11 can rotate relative to the first recess 12 .
- the first piston 23 is formed in a cylindrical shape, as shown in FIGS. 23b is formed.
- a sealing member 23c that seals between the outer circumferential surface of the first piston 23 and the inner circumferential surface of the first cylinder hole 28 is installed in the groove 23b.
- the seal member 23c is a lip-type seal member, and the lip portion 23d of the seal member 23c is inclined in a direction in which the outer diameter increases toward the distal end side of the first piston 23. Therefore, the lip portion 23d prevents the flow of compressed air from the distal end to the proximal end between the outer circumferential surface of the first piston 23 and the inner circumferential surface of the first cylinder hole 28.
- a first pressure chamber 28a defined by the first piston 23 is formed on the distal end side of the first cylinder hole 28.
- the first pressure chamber 28a is formed between the top 23a of the first piston 23 and the bottom surface of the first cylinder hole 28, and communicates with the arm through hole 27.
- a supply/discharge port 20d that can introduce compressed air into the arm through hole 27 from the outside is formed in the middle portion of the rotating arm portion 20 in the direction of the second axis L2.
- the second joint portion 40 connecting the tip end 20a of the rotating arm portion 20 and the base end 51b of the housing 51 of the chuck unit 50 is the same as described above, as shown in FIGS. 5 and 8 to 10. It has the same structure as the first joint part 10 described above, and includes a second ball body 41 and a second recess 42 that slidably accommodates the second ball body 41.
- the second joint section 40 has a second center point S2, and the rotating arm section 20 and the chuck unit 50 are connected to each other so as to be rotatable about the second center point S2.
- the second ball body 41 is formed in a spherical shape, and the distal end side of the second ball body 41 in the third axis L3 direction (extension direction of the chuck unit 50) is attached to the housing 51 of the chuck unit 50.
- the second center point S2 is located on the third axis L3.
- the second recess 42 opens at the tip of the rotating arm 20.
- the second recess 42 includes a second through hole 33 of the second cover member 32 attached to the tip of the rotating arm 20 and a second through hole 33 provided inside the tip of the rotating arm 20.
- the second through hole 33 and the second hole 34 are open in the direction of the third axis L3.
- An inner space 35 that is in communication and surrounded by the second through hole 33 and the second hole 34 forms a second recess 42 that accommodates the second ball body 41 .
- the second cover member 32 is formed into a plate shape, as shown in FIGS. It is fixed to the tip 20a of 20.
- a second through hole 33 penetrating in the second axis L2 direction is formed in the center of the second cover member 32, and both ends of the second through hole 33 in the second axis L2 direction are open.
- the inner surface of 33 forms a second outer sliding surface 33a that extends annularly around the second axis L2 and slides along the outer surface of the second ball body 41 on the other end side.
- the second outer sliding surface 33a contacts the outer surface of the second ball body 41 on the distal end side in the second axis L2 direction from the second center point S2.
- the second hole 34 of the second piston 30 is formed in a hemispherical shape that is concave from the distal end toward the proximal end.
- the inner surface of the second hole 34 forms a second inner sliding surface 34a that slides into contact with the outer surface of the proximal end of the second ball body 41.
- the second inner sliding surface 34a is It is formed into a conical surface whose inner diameter increases toward the side, and contacts the outer surface of the second ball body 41 on the base end side in the second axis L2 direction from the second center point S2.
- the depth of the second cylinder hole 29 that movably accommodates the second piston 30 is such that the second inner sliding surface 34a of the second piston 30 contacts the outer surface of the second ball body 41.
- the size is such that a gap 31 is formed between the proximal top portion 30a of the second piston 30 and the bottom surface of the second cylinder hole 29.
- the second piston 30 retreats through this gap 31 toward the proximal end, allowing the second ball body 41 to rotate relative to the second recess 42 .
- the second piston 30 is formed in a cylindrical shape, and an annular groove 30b extending in the circumferential direction is formed on the outer peripheral surface of the second piston 30.
- a sealing member 30c that seals between the outer circumferential surface of the second piston 30 and the inner circumferential surface of the second cylinder hole 29 is installed inside.
- This seal member 30c is a lip-type seal member, and the lip portion 30d of the seal member 30c is inclined in a direction in which the outer diameter increases from the distal end side to the proximal end side. Therefore, the lip portion 30d prevents the flow of compressed air from the proximal end to the distal end between the outer circumferential surface of the second piston 30 and the inner circumferential surface of the second cylinder hole 29.
- a second pressure chamber 29a defined by a second piston 30 is formed on the base end side of the second cylinder hole 29.
- the second pressure chamber 29a is formed between the proximal top portion 30a of the second piston 30 and the bottom surface of the second cylinder hole 29, and communicates with the arm through hole 27.
- the rotating arm portion 20 has the following functions: relative rotation between the first ball body 11 accommodated in the first recess 12 of the first joint portion 10 and the first recess 12;
- a first locking mechanism section 37 is provided that can lock and unlock relative rotation between the second ball body 41 housed in the second recess 42 of the second joint section 40 and the second recess 42 .
- the first locking mechanism section 37 includes the first and second through holes 22 and 33 formed in the first and second cover members 21 and 32, respectively, and the base end side of the rotating arm section 20. and first and second cylinder holes 28 and 29 formed inside each of the distal end sides; a first piston 23 movably provided in the first cylinder hole 28; and a first piston 23 movable in the second cylinder hole 29. It is configured to include a second piston 30 provided in the first cylinder hole 28 , a first pressure chamber 28 a formed in the first cylinder hole 28 , and a second pressure chamber 29 a formed in the second cylinder hole 29 .
- the first lock mechanism section 37 When compressed air is introduced into the arm through hole 27 from the supply/discharge port 20d, the first lock mechanism section 37 enters the first and second pressure chambers 28a and 29a of the first and second cylinder holes 28 and 29, respectively. Compressed air is supplied to move or press the first and second pistons 23 and 30 toward the distal end and the proximal end in the direction of the second axis L2. Therefore, the first ball body 11 is held between the first outer sliding surface 22a and the first inner sliding surface 24a, and the second ball body 41 is held between the second outer sliding surface 33a and the second inner sliding surface 34a. As a result, the rotating arm portion 20 is locked from rotating with respect to the support rod portion 6 and the chuck unit 50 shown in FIG. 5, respectively.
- the chuck unit 50 moves within the housing 51, a cylinder hole 52a formed inside the housing 51 and extending in the third axis L3 direction, and the cylinder hole 52a. It is configured to include a chuck piston 57 that can be provided, and a permanent magnet 60 that is attached to the chuck piston 57 and moves together with the chuck piston 57, and attracts the work 110 by magnetic force.
- the housing 51 is formed in a rectangular parallelepiped shape extending in the third axis L3 direction, and includes a cylinder tube 52 having a cylinder hole 52a formed therein, and a top cover 53 attached to the base end of the cylinder tube 52. and a bottom cover 54 attached to the tip of the cylinder tube 52.
- the cylinder hole 52a is partitioned by the chuck piston 57 into a first pressure chamber 52b formed on the base end side in the third axis L3 direction and a second pressure chamber 52c formed on the distal end side in the third axis L3 direction. ing.
- a first port 52d for supplying and discharging air is formed on the distal end side of the side wall 52e of the cylinder tube 52, and the first port 52d communicates with the second pressure chamber 52c.
- a second port 52f for supplying and discharging air is formed on the base end side of the side wall 52e of the cylinder tube 52, and the second port 52f communicates with the first pressure chamber 52b.
- a latch yoke 56 is inserted into the proximal end of the cylinder hole 52a to close the opening on the proximal end of the cylinder hole 52a.
- the chuck piston 57 includes a disk-shaped seal holder 58 disposed on the proximal end side, a core yoke 59 attached to the center of the distal end surface of the seal holder 58, and a permanent seal holder disposed on the circumferentially outer side of the core yoke 59. It includes a magnet 60, a cover yoke 61 disposed on the circumferentially outer side of the permanent magnet 60, and a ring plate 62 attached to the tip of the permanent magnet 60.
- the seal holder 58 is provided with a piston seal 63 in an annular groove formed on its outer circumferential surface, which slides into contact with the inner surface of the cylinder hole 52a.
- the core yoke 59 is formed in a cylindrical shape, and a recess 59b that opens at the tip is formed at the tip of the core yoke 59.
- the cover yoke 61 is formed in a cylindrical shape and is attached to the outer periphery of the distal end surface of the seal holder 58. Wear rings 65, 65 are provided in two annular grooves formed on the base end side of the cover yoke 61.
- the chuck piston 57 is guided and supported along the cylinder hole 52a by these wear rings 65, 65.
- An annular space 66 is formed between the inner peripheral surface of the cover yoke 61 and the outer peripheral surface of the core yoke 59, and a permanent magnet 60 is inserted into this space 66.
- the bottom cover 54 is formed into a disk shape and closes the opening at the tip of the cylinder hole 52a.
- a work suction surface 48a is formed at the tip of the bottom cover 54 and extends in a direction perpendicular to the third axis L3 direction.
- the chuck unit 50 configured in this manner reciprocates the chuck piston 57 in the third axis L3 direction by supplying and discharging compressed air to and from the first and second pressure chambers 52b and 52c of the cylinder hole 52a. Then, the permanent magnet 60 is moved toward the tip side of the casing 51 in the direction of the third axis L3, and the workpiece 110 is attracted to the workpiece attraction surface 48a at the attraction position P1 (see FIG. 11), and the casing 51 to release the suction of the workpiece 110 (see FIG. 12).
- the top cover 53 is fixed to the base end 51b of the housing 51 by fastening means such as bolts, and the tip of the second ball body 41 is screwed and attached to the center of the top cover 53.
- the housing 51 of the chuck unit 50 has the cylinder hole 52a extending in the third axis L3 direction for moving the permanent magnet 60 between the attraction position P1 and the attraction release position P2. Further, the second ball body 41 is attached to protrude from the base end side of the housing 51. Therefore, the chuck unit 50 is formed in the shape of a rectangular parallelepiped that is vertically elongated in the direction of the third axis L3.
- the support section 70 includes an arm support member 71 having a plurality of through holes 71a through which each support rod part 6 of a plurality of magnetic chucks 5 can be individually reciprocated, and a plurality of arm support members 71.
- a plurality of connection parts 75 are attached to the arm support member 71 and have communication holes 77 through which each support rod part 6 of the magnetic chuck 5 is individually inserted, and a plurality of connection parts 75 are attached to each of the plurality of support rod parts 6, and each Each of the plurality of retaining members 3 and the plurality of magnetic chucks 5 come into contact with the base end of the connecting portion 75 as the support rod portion 6 moves to prevent the support rod portion 6 from being pulled out from the through hole 71a.
- a plurality of compression coils are located between the provided connecting portion 75 and the support rod portion 6, and urge each of the plurality of magnetic chucks 5 toward the distal end side in the first axis L1 direction with respect to the arm support member 71.
- a spring 108 spring member, compression spring).
- the arm support member 71 is formed in a plate shape extending in a direction (lateral direction) orthogonal to the first axis L1, and has a distal end surface and a proximal end surface at both ends in the first axis L1 direction.
- a plurality of through holes 71a are formed in the arm support member 71 at equal intervals in the lateral direction.
- a connecting support portion 71b that protrudes toward the proximal end along the first axis L1 is attached to the center portion of the arm support member 71 in the lateral direction. For example, a tip arm of a robot, a lifting machine, etc. are connected to this connection support portion 71b.
- the support rod portion 6 is inserted into each of the plurality of through holes 71a along the first axis L1 direction.
- the connecting portion 75 includes a connecting body portion 76 that extends in the first axis L1 direction and has a base end 76b (one end) and a distal end 76c (other end) on both sides thereof. ing.
- a communication hole 77 extending in the direction of the first axis L1 passes through the inside of the connection body 76.
- a second locking mechanism section 80 that can lock and unlock the support rod section 6 with respect to the arm support member 71 is provided in the communication hole 77 of the connection body section 76 .
- the second locking mechanism section 80 includes a second proximal locking mechanism section 81 provided on the proximal side of the communication hole 77 and a second distal locking mechanism provided on the distal side of the communication hole 77. It is configured to include a mechanism section 82.
- the proximal second locking mechanism section 81 has a third cylinder hole 78 that is formed on the proximal side of the communication hole 77 of the connecting body section 76 and extends in the first axis L1 direction.
- a brake pad 83 having a pressing surface 83d disposed to face the side surface of the support rod portion 6 within the third cylinder hole 78, and a brake pad 83 movable within the third cylinder hole 78 in the first axis L1 direction;
- a third piston 84 having an inclined surface 84a disposed in the third cylinder hole 78 on the radially outer side of the first axis L1 than the brake pad 83;
- a pressing member 85 receives a pressing force directed radially inward from an inclined surface 84a due to the movement of the third piston 84, and a third pressure chamber 86 in which a third cylinder hole 78 is defined by the third piston 84. be done.
- the third cylinder hole 78 is formed in a cylindrical shape that opens at the base end of the connecting body 76, and the inner diameter of the third cylinder hole 78 is larger than the inner diameter of the communication hole 77.
- a step portion 78a is formed in an annular shape and extends in a direction perpendicular to the first axis L1 direction.
- the brake pad 83 is formed into a cylindrical shape from an elastic member such as synthetic resin.
- the brake pad 83 includes a plurality of brake pieces 83a divided at equal intervals in the circumferential direction.
- Each brake piece 83a is formed in a fan shape that spreads outward in the radial direction around the first axis L1, and the inside of the brake piece 83a in the radial direction has an arc-shaped pressing surface on which the side surface of the support rod portion 6 slides. 83d is formed.
- this pressing surface 83d constitutes a part of a through hole 83b surrounding the outer peripheral surface of the support rod part 6 and into which the support rod part 6 is inserted.
- a plurality of annular grooves 83e are formed in the pressing surface 83d at intervals in the first axis L1 direction, and are open inward in the radial direction and extend so as to surround the support rod portion 6.
- a groove 83c is formed on the outer surface of the brake piece 83a to accommodate a portion of the pressing member 85 and extend in the direction of the first axis L1.
- the third piston 84 is formed in a cylindrical shape, and a through hole 84b that penetrates in the direction of the first axis L1 is formed in the center of the third piston 84.
- the support rod portion 6 is inserted into the through hole 84b so as to be movable in the direction of the first axis L1.
- a third hole 84c is open at the base end of the third piston 84, and the third hole 84c is recessed to an intermediate portion of the third piston in the first axis L1 direction.
- the inner surface of the third hole 84c forms an inclined surface 84a that extends annularly to surround the pressing member 85 and whose inner diameter increases toward the base end.
- An annular groove 84d extending in the circumferential direction is formed on the outer circumferential surface of the tip side of the third piston 84, and the outer circumferential surface of the third piston 84 and the inner circumference of the third cylinder hole 78 are formed in the groove 84d.
- a sealing member 87 is inserted to seal between the surfaces.
- a sealing member 88 is inserted into the inner surface of the through hole 84b of the third piston 84 and seals between the inner surface of the through hole 84b and the side surface of the support rod portion 6 in an annular groove extending in the circumferential direction. ing.
- Each of these seal members 87 and 88 is a lip-type seal member, and these lip portions 87a and 88a are inclined in a direction in which the outer diameter increases toward the distal end side in the first axis L1 direction. Therefore, these lip portions 87a, 88a are provided between the outer circumferential surface of the third piston 84 and the inner circumferential surface of the third cylinder hole 78, and between the inner surface of the through hole 84b and the side surface of the support rod portion 6. It is possible to prevent the flow of compressed air from the distal end side to the proximal end side.
- the pressing member 85 has a plurality of metal spheres 85a, and the plurality of spheres 85a are inserted into the respective grooves 83b of the plurality of brake pieces 83a.
- the plurality of spheres 85a are supported by a sphere support member 89.
- the sphere support member 89 is formed in a cylindrical shape with a hole 89a opening at the base end, and the base end of the sphere support member 89 has a flange projecting outward in the radial direction.
- the portion 89b is formed in an annular shape.
- the flange portion 89b is installed on the base end of the connection body 76 and is fixed to the connection body 76 by fastening means such as bolts 89c.
- the hole 89a is formed in a cylindrical shape extending along the first axis L1 direction to the distal end side, and the bottom of the hole 89a extends in a direction perpendicular to the first axis L1 direction.
- a through hole 89d through which the support rod portion 6 is inserted is formed at the center of the bottom of the hole portion 89a.
- a brake pad 83 attached to the support rod portion 6 is accommodated in the hole portion 89a.
- the tip of the brake pad 83 is in contact with the bottom surface of the hole 89a. This prevents the brake pad 83 from moving toward the tip side.
- the outer surface of the side wall 90 of the spherical support member 89 forms an inclined surface 90a whose outer diameter increases toward the base end. This inclined surface 90a extends substantially parallel to the inclined surface 84a of the third piston 84.
- a plurality of holes 90b for accommodating the spheres 85a are formed at equal intervals in the circumferential direction. Each of the plurality of holes 90b is arranged to face each of the grooves 83c of the plurality of brake pieces 83a, and penetrates the side wall 90 in the radial direction.
- the inner diameter of the hole 90b is slightly larger than the diameter of the sphere 85a, and the thickness of the side wall 90 (the length of the hole 90b) is smaller than the diameter of the sphere 85a. Therefore, the sphere 85a is movable in the radial direction within the hole 90b, and both ends of the sphere 85a protrude from both ends of the hole 90b.
- the radially inner end of the sphere 85a contacts the inner surface of the groove 83c of the brake pad 83, and the radially outer end of the sphere 85a contacts the inclined surface 84a of the third piston 84.
- the third pressure chamber 86 is formed by partitioning the tip side of the third cylinder hole 78 by the third piston 84.
- the third pressure chamber 86 is formed between the top 84e of the third piston 84 on the distal end side and the bottom surface of the third cylinder hole 78, and communicates with the communication hole 77.
- a supply/discharge port 92 that can introduce compressed air from the outside into the communication hole 77 is formed in the intermediate portion of the connection body 76 in the direction of the first axis L1.
- the distal second locking mechanism section 82 is configured in substantially the same manner as the proximal second locking mechanism section 81 described above, so the parts that are different from the proximal second locking mechanism section 81 will be explained, The description of parts that are the same as the side second locking mechanism part 81 will be simplified.
- the second locking mechanism part 82 on the distal end side includes a fourth cylinder hole 79 formed on the distal end side of the communication hole 77 of the connecting part 75, and a fourth cylinder hole 79, there is a brake pad 83 having a pressing surface 83d disposed opposite to the side surface of the support rod portion 6, and a fourth cylinder movable within the fourth cylinder hole 79 and radially outer than the brake pad 83.
- a fourth piston 94 having an inclined surface 94a is disposed in the cylinder hole 79, and a fourth piston 94 is disposed between the brake pad 83 and the inclined surface 94a and is pushed radially inward from the inclined surface 94a by movement of the fourth piston 94. It is configured to include a pressing member 85 that receives pressure, and a fourth pressure chamber 95 in which a fourth cylinder hole 79 is defined by a fourth piston 94.
- the fourth cylinder hole 79 is formed in a cylindrical shape that opens at the tip of the connection body 76, and the inner diameter of the fourth cylinder hole 79 is larger than the inner diameter of the communication hole 77.
- a step portion 79a is formed in an annular shape and extends in a direction perpendicular to the first axis l1 direction.
- the brake pad 83 is the same as the brake pad 83 of the proximal second locking mechanism section 81, so a description thereof will be omitted.
- the support rod portion 6 is inserted into the through hole 94b penetrating the fourth piston 94 in the center thereof so as to be movable in the first axis L1 direction.
- a fourth hole 94c is open at the tip of the fourth piston 94, and the inner surface of the fourth hole 94c is formed into an inclined surface 94a whose inner diameter increases toward the tip.
- An annular groove 94d is formed in the outer circumferential surface of the base end of the fourth piston 94, and a gap between the outer circumferential surface of the fourth piston 94 and the inner circumferential surface of the fourth cylinder hole 79 is formed in the groove 94d.
- a sealing member 96 for sealing is attached.
- a sealing member 97 for sealing between the inner surface of the through hole 94b and the side surface of the support rod portion 6 is installed in an annular groove formed on the inner surface of the through hole 94b of the fourth piston 94.
- seal members 96 and 97 are lip-type seal members, and lip portions 96a and 97a of these seal members 96 and 97 are inclined in a direction in which the outer diameter increases from the distal end side to the proximal end side. Therefore, these lip portions 96a and 97a are provided between the outer circumferential surface of the fourth piston 94 and the inner circumferential surface of the fourth cylinder hole 79, and between the inner surface of the through hole 94b and the side surface of the support rod portion 6. It is possible to prevent the flow of compressed air from the proximal end to the distal end.
- the pressing member 85 is composed of a plurality of metal spheres 85a, and is supported by a sphere support member 89.
- the spherical body support member 89 is formed in a cylindrical shape with a hole 89a opening at the tip, and a flange portion 89b formed at the tip of the spherical body support member 89 is attached to the tip of the connecting body 76 with a bolt 89c or the like. It is fixed with fastening means.
- the support rod portion 6 is inserted into a through hole 89d formed at the bottom of the hole portion 89a, and the brake pad 83 attached to the support rod portion 6 is accommodated in the hole portion 89a.
- the base end of the brake pad 83 is in contact with the bottom surface of the hole 89a. This prevents the brake pad 83 from moving toward the tip side.
- the outer surface of the side wall 90 of the spherical body support member 89 is an inclined surface 90a whose outer diameter increases as it advances toward the distal end, and this inclined surface 90a is similar to the inclined surface 94a of the fourth piston. extending in parallel.
- a side wall 90 of the sphere support member 89 is formed with a plurality of holes 90b for accommodating each of the plurality of spheres 85a. The radially inner end of the sphere 85a inserted into the hole 90b contacts the inner surface of the groove 83c of the brake pad 83, and the radially outer end of the sphere 85a contacts the inclined surface 94a of the fourth piston 94. are doing.
- the fourth pressure chamber 95 is formed by partitioning the base end side of the fourth cylinder hole 79 by the fourth piston 94. In this embodiment, the fourth pressure chamber 95 is formed between the proximal top portion 94e of the fourth piston 94 and the bottom surface of the fourth cylinder hole 79, and communicates with the communication hole 77.
- proximal and distal second locking mechanisms 81 and 82 configured in this manner, compressed air is supplied and discharged from the supply and discharge port 92 to and from the third and fourth pressure chambers 86 and 95 through the communication hole 77.
- the third and fourth pistons 84 and 94 can be pressed against and released from the pressing member 85.
- the spherical body 85a receives a pressing force directed inward in the radial direction from the inclined surfaces 84a and 94a.
- the brake pads 83, 83 are pressed radially inward, and the pressing surfaces 83d, 83d press the side surface of the support rod portion 6. Thereby, the support rod portion 6 can be locked to the arm support member 71 (connection body portion 76).
- the base end of the connecting body 76 has an insertion hole 100a penetrating in the first axis L1 direction, and is inserted into the through hole 71a of the arm support member 71.
- a fixing member 100 is attached.
- the fixing member 100 includes a fixing body part 101 formed in a cylindrical shape extending in the first axis L1 direction and having a base end 101d and a distal end 101e on both sides, and a fixing body part 101 extending from the distal end side of the fixing body part 101. It has an annular flange portion 101a that projects outward in the radial direction, and a cylindrical locking projection portion 101b that projects from the tip of the fixed main body portion 101.
- the flange portion 101a is installed on the base end of the spherical support member 89 and is fixed to the spherical support member 89 by fastening means such as screws 102. Therefore, the fixing member 100 is fixed to the connecting body 76 via the spherical support member 89.
- the support rod portion 6 is inserted into the insertion hole 100a of the fixing member 100, and the flange portion 101a is fixed to the base end of the spherical support member 89.
- the distal end of the locking protrusion 101b is in contact with the proximal end of the brake pad 83.
- the brake pad 83 is held between the locking protrusion 101b and the bottom surface of the hole 89a of the spherical support member 89, and can be prevented from moving to both sides in the first axis L1 direction. .
- the outer diameter of the fixed main body part 101 is smaller than the inner diameter of the through hole 71a of the arm support member 71, and a male threaded part 101c is formed on the side surface of the fixed main body part 101 on the proximal end side.
- the fixed main body part 101 is inserted into the through hole 71a of the arm support member 71, and the proximal end face of the flange part 101a is in contact with the distal end face of the arm support member 71.
- the side protrudes from the through hole 71a.
- the fixing member 100 is fixed to the arm support member 71 by screwing the mounting nut 103 into the male threaded portion 101c of the protruding fixing body portion 101.
- the connecting trunk 76 is removably fixed to the arm support member 71 via the fixing member 100.
- a cover member 104 having an insertion hole 104a penetrating in the first axis L1 direction is attached to the distal end 76c of the connecting body 76, as shown in FIGS. 3, 15, and 16. ing.
- the cover member 104 includes a cylindrical cover main body part 105 extending in the first axis L1 direction, and an annular flange part 105a protruding radially outward from a middle part of the cover main body part 105 in the first axis L1 direction. It becomes.
- the flange portion 105a is installed on the tip of the spherical support member 89 and is fixed to the spherical support member 89 by fastening means such as screws 102. Therefore, the cover member 104 is fixed to the connecting body 76 via the spherical support member 89.
- the base end of the cover main body 105 is in contact with the tip of the brake pad 83.
- the brake pad 83 is held between the cover body 105 and the bottom surface of the hole 89a of the spherical support member 89, thereby preventing the brake pad 83 from moving to both sides in the first axis L1 direction. be able to
- the support rod part 6 has a proximal end protruding from the proximal end of the insertion hole 100a of the fixing member 100, and a proximal end 6b of the support rod part 6.
- a retaining member 3 is attached to.
- the retaining member 3 is formed in a cylindrical shape, and its diameter is larger than the inner diameter of the insertion hole 100a of the fixing member 100 and smaller than the inner diameter of the through hole 71a of the arm support member 71.
- the retaining member 3 can be inserted through the through hole 71a of the arm support member 71, the retaining member 3 can be inserted into and removed from the through hole 71a of the arm support member 71 while being attached to the support rod portion 6. . Further, since the retaining member 3 is larger than the inner diameter of the insertion hole 100a of the fixing member 100, when the support rod portion 6 moves toward the distal end with respect to the connecting portion 75, the support rod portion 6 fixes the fixing member 100. Since it comes into contact with the base end 101d of the main body part 101, it is possible to prevent the support rod part 6 from coming off from the connecting part 75.
- the connecting nut 2 screwed onto the tip of the support rod portion 6 has a larger diameter than the outer diameter of the support rod portion 6. Therefore, when the connecting nut 2 is attached to the support rod part 6, the base end of the connecting nut 2 forms a spring seat 2b (step part) that projects radially outward with respect to the support rod part 6.
- a compression coil spring (compression spring, spring member) 108 is provided between the spring seat 2b and the cover member 104.
- the compression coil spring 108 has the support rod portion 6 inserted therein, one end of which abuts the tip of the cover member 104, and the other end abuts the spring seat 2b of the connecting nut 2. It is installed in the condition.
- the compression coil spring 108 always urges the support rod portion 6 toward the distal end side.
- the workpiece suction device 1 is constructed by attaching a plurality of magnetic chucks 5 to an arm support member 71, and the support rod portions 6 of these magnetic chucks 5 are arranged parallel to each other. It is attached to the arm support member 71 so that
- the workpiece suction device 1 causes the base end surface (hereinafter referred to as the "upper surface") of the workpiece 110 in the first axis L1 direction (hereinafter referred to as the "vertical direction”) to be fixed relative to the vertical direction.
- a workpiece 110 is formed having a non-slanted surface facing in the same direction as the direction perpendicular to the left-right direction (hereinafter referred to as the "left-right direction”), and a plurality of inclined surfaces inclined in different directions with respect to the left-right direction. The case of adsorption will be explained.
- the workpiece 110 further has different heights in the vertical direction of the non-inclined surface and some of the plurality of inclined surfaces. That is, as shown in FIG. 3, the workpiece 110 is formed by bending a plurality of metal plate-like members, and has a first inclined surface 110a, a second inclined surface 110b, and a non-inclined surface 110c from the left side to the right side. , and has a third inclined surface 110d.
- the first inclined surface 110a is a right-sloping inclined surface that slopes upward as it progresses from the left side to the right side
- the second inclined surface 110b is located at approximately the same height as the first inclined surface 110a and as it moves from the left side to the right side.
- the non-slanted surface 110c is located at a lower position than the first and second inclined surfaces 110a and 110b and extends in the left-right direction, and the third inclined surface 110d is located at an intermediate position in the left-right direction. is a right-sloping slope located at the same height as the non-slanted surface 110c and whose slope angle is smaller than that of the second sloped surface 110b.
- the workpiece 110 formed in this way is to be sucked by the workpiece suction device 1
- the workpiece 110 is first placed below the workpiece suction device 1.
- the support rod section 6 and the chuck unit 50 of the rotating arm section 20 are unlocked by the first lock mechanism section 37, and the connection body section 76 is supported by the second lock mechanism section 80.
- the permanent magnet 60 of the chuck unit 50 is moved to the attraction position P1.
- the support rod part 6 becomes vertically movable with respect to the connecting body part 76, and the entire magnetic chuck 5 moves downward, so that the retaining member 3 comes into contact with the base end 101d of the fixing member 100.
- the magnetic chuck 5 stops moving downward, and the entire magnetic chuck 5 becomes in a state of extending linearly along the first axis L1 direction.
- each rotating arm section 20 is rotated in the left-right direction about the first center point S1 of the first joint section 10 as a rotation fulcrum.
- each chuck unit 50 is rotated in the left-right direction using the second center point S2 of the second joint portion 40 as a rotation fulcrum. Therefore, each workpiece suction surface 48a can contact and suction the workpiece in a state that follows the first and second inclined surfaces 110a, 110b without shifting from a predetermined position.
- the rotating arm portion 20 is rotated in the right direction using the first center point S1 of the first joint portion 10 as a rotation fulcrum, and the chuck unit 50 is rotated to the right at the second center point S2 of the second joint portion 40. Rotate to the left using as a rotation fulcrum. Therefore, the workpiece suction surface 48a can contact and suction the workpiece in a state following the third inclined surface 110d without shifting from the predetermined position.
- the rotating arm section 20 does not rotate with respect to the first center point S1 of the first joint section 10 and the second center point S2 of the second joint section 40, so that the magnetic chuck 5 , maintained in a straight line position. Therefore, the workpiece suction surface 48a can contact and suction the workpiece in a state that follows the non-inclined surface 110c without shifting from the predetermined position.
- the base end of the rotating arm portion 20 is rotatably connected to the tip of the support rod portion 6 by the first joint portion 10, and the rotating arm Since the tip of the part 20 is rotatably connected to the base end of the chuck unit 50 by the second joint part 40, even if the upper surface of the work 110 is inclined with respect to the work suction surface 48a, the work can be suctioned.
- the surface 48a can be attracted to a predetermined position on the upper surface of the work while following the upper surface of the work.
- the chuck unit 50 is shown to be vertically long, but the chuck unit 50 may be horizontally long so that the size in the width direction is larger than the length in the third axis L3 direction. But that's fine.
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Abstract
Description
3 抜止部材
5 マグネットチャック
6 支持ロッド部
6a,51a,76b 先端
6b,51b,76c 基端
10 第1ジョイント部
11 第1ボール体
12 第1凹部
20 回動アーム部
21 第1カバー部材
22 第1貫通孔
22a 第1外側摺接面
23 第1ピストン
24 第1穴部
24a 第1内側摺接面
26,35 内部空間
28 第1シリンダ孔
29 第2シリンダ孔
30 第2ピストン
32 第2カバー部材
33 第2貫通孔
33a 第2外側摺接面
34 第2穴部
34a 第2内側摺接面
37 第1ロック機構部
40 第2ジョイント部
41 第2ボール体
42 第2凹部
48a ワーク吸着面
50 チャックユニット
51 筐体
52a シリンダ孔
52b 第1圧力室
52c 第2圧力室
57 チャックピストン
60 永久磁石
70 支持部
71 アーム支持部材
71a 貫通孔
75 連結部
76 連結胴部
77 連通孔
78 第3シリンダ孔
80 第2ロック機構部
81 基端側第2ロック機構部(第2ロック機構部)
82 先端側第2ロック機構部(第2ロック機構部)
83 ブレーキパッド
84 第3ピストン
85 押圧部材
86 第3圧力室
94 第4ピストン
95 第4圧力室
100 固定部材
108 圧縮コイルばね(ばね部材、圧縮ばね)
L1 第1軸
L2 第2軸
L3 第3軸
P1 吸着位置
P2 吸着解除位置
S1 第1中心点
S2 第2中心点
Claims (13)
- 第1軸方向に往復動可能であり、その移動方向の両端に先端及び基端を有した支持ロッド部と、第2軸方向の両端に一端及び他端を有し前記支持ロッド部の先端に一端が第1ジョイント部で回動自在に連結された回動アーム部と、第3軸方向の両端に先端及び基端を有する筐体を有し、前記筐体の基端が前記回動アーム部の他端に第2ジョイント部で回動自在に連結され、磁力によってワークを吸着するためのチャックユニットと、を有するマグネットチャックを備えるワーク吸着装置であって、
前記マグネットチャックにおいて、
前記チャックユニットは、前記筐体の先端に前記第3軸に対して直交する方向に延びるワーク吸着面が形成されており、
前記第1ジョイント部は、第1中心点を有しており、
前記支持ロッド部と前記回動アーム部とは、前記第1中心点を中心として相互に回動自在であり、
前記第2ジョイント部は、第2中心点を有しており、
前記回動アーム部と前記チャックユニットとは、前記第2中心点を中心として相互に回動自在である、
ことを特徴とするワーク吸着装置。 - 前記チャックユニットは、前記筐体の内側に形成されて前記第3軸方向に延びるシリンダ孔と、前記シリンダ孔内を移動可能に設けられたチャックピストンと、前記チャックピストンに取り付けられて前記チャックピストンとともに移動する永久磁石と、を有しており、
前記永久磁石は、前記第3軸方向において、前記永久磁石を前記筐体の先端側に移動させて前記ワークを前記ワーク吸着面で吸着させるための吸着位置と、前記永久磁石を前記筐体の基端側へ移動させて前記ワークの吸着を解除するための吸着解除位置との間で往復動可能である、
ことを特徴とする請求項1に記載のワーク吸着装置。 - 前記第1ジョイント部は、前記第1中心点を有した第1ボール体と、前記第1ボール体を摺動自在に収容する第1凹部と、を有して構成され、
前記第2ジョイント部は、前記第2中心点を有した第2ボール体と、前記第2ボール体を摺動自在に収容する第2凹部と、を有して構成されている、
ことを特徴とする請求項1又は2に記載のワーク吸着装置。 - 前記第1ジョイント部において、前記第1ボール体は前記支持ロッド部に取り付けられ、前記第1凹部は前記回動アーム部の一端に開口しており、
前記第2ジョイント部において、前記第2ボール体は前記チャックユニットの基端に取り付けられ、前記第2凹部は前記回動アーム部の他端に開口している、
ことを特徴とする請求項3に記載のワーク吸着装置。 - 前記回動アーム部は、前記第1ジョイント部の前記第1凹部に収容された前記第1ボール体と前記第1凹部との相対回動、及び前記第2ジョイント部の前記第2凹部に収容された前記第2ボール体と前記第2凹部との相対回動をロック及びロック解除可能な第1ロック機構部を有している、
ことを特徴とする請求項4に記載のワーク吸着装置。 - 前記回動アーム部は、その一端に取り付けられて前記第2軸方向に貫通する第1貫通孔を有した第1カバー部材と、前記回動アーム部の他端に取り付けられて前記第2軸方向に貫通する第2貫通孔を有した第2カバー部材と、を有し、
前記第1ロック機構部は、
前記第1及び前記第2カバー部材のそれぞれに形成された前記第1及び前記第2貫通孔と、
前記回動アーム部の一端側及び他端側の各内部に形成された第1及び第2シリンダ孔と、
前記第1シリンダ孔内に移動可能に設けられて一端側に開口する第1穴部を有した第1ピストンと、
前記第2リンダ孔内に移動可能に設けられて他端側に開口する第2穴部を有した第2ピストンと、
前記第1シリンダ孔の前記第2軸方向の他端側に形成されて前記第1ピストンによって区画された第1圧力室と、
前記第2シリンダ孔の前記第2軸方向の一端側に形成されて前記第2ピストンによって区画された第2圧力室と、を有して構成されており、
前記第1貫通孔及び前記第1穴部は、前記第2軸方向において連通し、前記第1貫通孔及び前記第1穴部で囲まれた内側空間は、前記第1ボール体を収容する前記第1凹部を形成し、
前記第1貫通孔の内面には、前記第1ボール体の前記第2軸方向の一端側の外面に摺接する第1外側摺接面が形成され、
前記第1穴部の内面には、前記第1ボール体の前記第2軸方向の他端側の外面に摺接する第1内側摺接面が形成されており、
前記第2貫通孔及び前記第2穴部は、前記第2軸方向において連通し、前記第2貫通孔及び前記第2穴部で囲まれた内側空間は、前記第2ボール体を収容する前記第2凹部を形成し、
前記第2貫通孔の内面には、前記第2ボール体の前記第2軸方向の他端側の外面に摺接する第2外側摺接面が形成され、
前記第2穴部の内面には、前記第2ボール体の前記第2軸方向の一端側の外面に摺接する第2内側摺接面が形成されており、
前記第1及び前記第2シリンダ孔のそれぞれの前記第1及び前記第2圧力室に対して圧縮空気を給排することにより、前記第1及び前記第2ピストンを前記第2軸方向に往復動させることができるようになっており、
前記第1及び前記第2圧力室に供給される圧縮空気で、前記第1ピストンを前記第2軸方向の一端側に、前記第2ピストンを前記第2軸方向の他端側に移動させることにより、前記第1外側摺接面及び前記第1内側摺接面で前記第1ボール体を挟持させるとともに、前記第2外側摺接面及び前記第2内側摺接面で前記第2ボール体を挟持させ、
それにより、前記回動アーム部は、前記支持ロッド部及び前記チャックユニットのそれぞれに対して回動がロックされる、
ことを特徴とする請求項5に記載のワーク吸着装置。 - 前記第1貫通孔の前記第1外側摺接面は、前記第1ボール体の前記第1中心点よりも前記第2軸方向の一端側の外面に接触し、
前記第1穴部の前記第1内側摺接面は、前記第1ボール体の前記第1中心点よりも前記第2軸方向の他端側の外面に接触し、
前記第2貫通孔の前記第2外側摺接面は、前記第2ボール体の前記第2中心点よりも前記第2軸方向の他端側の外面に接触し、
前記第2穴部の前記第2内側摺接面は、前記第2ボール体の前記第2中心点よりも前記第2軸方向の一端側の外面に接触する、
ことを特徴とする請求項6に記載のワーク吸着装置。 - 前記第1ピストンの前記第1内側摺接面は、前記第2軸方向の一端側に進むに従って内径が拡大する円錐面に形成され、
前記第2ピストンの前記第2内側摺接面は、前記第2軸方向の他端側に進むに従って内径が拡大する円錐面に形成されている、
ことを特徴とする請求項7に記載のワーク吸着装置。 - 請求項5から8のいずれか1項に記載の複数の前記マグネットチャックと、
複数の前記マグネットチャックの各支持ロッド部を往復動可能に支持する支持部と、を有し、
前記支持部は、
前記第1軸に対して直交する方向に延び、複数の前記マグネットチャックの各支持ロッド部を個別に往復動可能に挿通する複数の貫通孔を有したアーム支持部材と、
複数の前記マグネットチャックの各支持ロッド部を個別に挿通する連通孔を有して前記アーム支持部材に取り付けられ、前記アーム支持部材に対して前記支持ロッド部をロック及びロック解除可能な第2ロック機構部を有した複数の連結部と、
複数の前記支持ロッド部のそれぞれに取り付けられ、前記支持ロッド部の移動によって前記連結部の前記第1軸方向の一端に当接して、前記貫通孔から前記支持ロッド部が抜脱されるのを防止する複数の抜止部材と、
複数の前記マグネットチャックのそれぞれにおける前記連結部と前記支持ロッド部との間に設けられ、複数の前記マグネットチャックのそれぞれを前記アーム支持部材に対して前記第1軸方向の先端側へ付勢する複数のばね部材と、を有して構成され、
複数の前記マグネットチャックの各支持ロッド部は、互いに間隔を有してそれぞれの前記第1軸が平行になるように前記アーム支持部材に配置されている、
ことを特徴とするワーク吸着装置。 - 前記連結部の前記第2ロック機構部は、
前記第1軸方向に延びて前記連結部の前記連通孔に形成された第3シリンダ孔と、
前記第3シリンダ孔内において、前記支持ロッド部の側面に対向して配置された押圧面を有するブレーキパッドと、
前記第3シリンダ孔内を前記第1軸方向に移動可能であり、前記ブレーキパッドよりも前記第1軸の径方向外側の前記第3シリンダ孔内に配置された傾斜面を有する第3ピストンと、
前記ブレーキパッドと前記傾斜面との間に配置されて前記第3ピストンの移動により前記傾斜面から径方向内側を向く押圧力を受ける押圧部材と、
前記第3ピストンによって前記第3シリンダ孔が区画された第3圧力室と、を有して構成され、
前記第3シリンダ孔の前記第3圧力室に対して圧縮空気を給排することにより、前記第3ピストンを前記第1軸方向に往復動させることができるようになっており、
前記第3圧力室に供給された圧縮空気で前記第3ピストンを移動させることにより、前記押圧部材が前記傾斜面から径方向内側を向く押圧力を受けて前記ブレーキパッドを径方向内側へ押圧して、前記押圧面が前記支持ロッド部の側面を押圧し、
それにより、前記アーム支持部材に対して前記支持ロッド部がロックされる、
ことを特徴とする請求項9に記載のワーク吸着装置。 - 前記連結部は、前記第1軸方向の両側に一端及び他端を有し、一端が前記アーム支持部材に取り付けられ、内部に前記連通孔が形成された連結胴部を有し、
前記連結胴部は、その一端に取り付けられて前記第1軸方向に貫通する挿通孔を有して前記アーム支持部材の前記貫通孔に挿通される固定部材を備え、
前記挿通孔は、前記連結胴部の前記連通孔に連通して、前記挿通孔及び前記連通孔に前記支持ロッド部が挿通され、
前記固定部材は、前記アーム支持部材の前記貫通孔に挿通された状態で、前記アーム支持部材に着脱可能に取り付けられ、
それにより、前記連結胴部は、前記アーム支持部材に着脱可能に取り付けられている、
ことを特徴とする請求項10に記載のワーク吸着装置。 - 前記固定部材は、前記アーム支持部材の前記第1軸方向の一端側の端面から突出した状態で前記アーム支持部材に取り付けられ、
前記支持ロッド部は、その基端部が前記固定部材における前記挿通孔の前記第1軸方向の一端から突出した状態で、前記支持ロッド部の基端部に前記抜止部材が取り付けられ、
前記抜止部材は、前記固定部材の前記挿通孔の内径よりも大きく、且つ前記アーム支持部材の前記貫通孔の内径よりも小さい直径を有した円柱状に形成されている、
ことを特徴とする請求項11に記載のワーク吸着装置。 - 前記ばね部材は、前記連結胴部の他端と前記支持ロッド部の先端部との間に配置された圧縮ばねである、
ことを特徴とする請求項11又は12に記載のワーク吸着装置。
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EP23770561.1A EP4494820A1 (en) | 2022-03-16 | 2023-03-08 | Workpiece clamping device |
CN202380027472.3A CN118871262A (zh) | 2022-03-16 | 2023-03-08 | 工件吸附装置 |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07171784A (ja) | 1993-12-17 | 1995-07-11 | Murata Mach Ltd | チャック装置 |
JP3087910U (ja) | 2002-02-12 | 2002-08-23 | エスエムシー株式会社 | ロック保持機構 |
JP2019186324A (ja) | 2018-04-05 | 2019-10-24 | Smc株式会社 | マグネットチャック |
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07171784A (ja) | 1993-12-17 | 1995-07-11 | Murata Mach Ltd | チャック装置 |
JP3087910U (ja) | 2002-02-12 | 2002-08-23 | エスエムシー株式会社 | ロック保持機構 |
JP2019186324A (ja) | 2018-04-05 | 2019-10-24 | Smc株式会社 | マグネットチャック |
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CN118871262A (zh) | 2024-10-29 |
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