actuator
An actuator, direct-acting technology, applied in the direction of electric components, connection with control/drive circuits, electromechanical devices, etc., can solve the problems of workpiece damage and inability to attract workpieces, etc.
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no. 1 approach ＞
[0036] figure 1 It is an external view of the actuator 1 of this embodiment. The actuator 1 has a housing 2 having a substantially rectangular parallelepiped shape, and a cover 200 is attached to the housing 2 . figure 2 It is a schematic structural diagram showing the internal structure of the actuator 1 of this embodiment. Part of the shaft 10 is housed inside the casing 2 . The front end portion 10A side of the shaft 10 is formed hollow. The material of the shaft 10 and the housing 2 can be, for example, metal (for example, aluminum), but resin or the like can also be used. In addition, in the following description, an XYZ rectangular coordinate system is set, and the position of each member is demonstrated referring this XYZ rectangular coordinate system. Let the long-side direction of the largest surface of the housing 2 and the direction of the central axis 100 of the shaft 10 be the Z-axis direction, and the short-side direction of the largest surface of the housin...
no. 2 approach ＞
[0084] Here, in the pick-up process, when the linear motor 30 is stopped at the moment when the shaft 10 comes into contact with the workpiece W, the front end portion 10A of the shaft 10 and the workpiece W may not be in close contact with each other and the front end portion 10A of the shaft 10 may not be in close contact with each other. The case where there is a gap between a part and the workpiece W. When a negative pressure is generated in the tip portion 10A in this state, the workpiece W moves toward the tip portion 10A at a portion where there is a gap between the tip portion 10A and the workpiece W, and the workpiece W collides with the tip portion 10A. Due to this collision, the workpiece W may be damaged. In addition, when there is a gap between part of the front end portion 10A of the shaft 10 and the workpiece W, air flows from the outside of the shaft 10 into the internal space 500 . As a result, there is a possibility that the pressure in the internal space 50...
no. 3 approach ＞
[0095] In the above-described embodiment, after the linear motor 30 is stopped, the negative pressure solenoid valve 63B is opened to generate a negative pressure at the front end 10A of the shaft 10 to attract the workpiece W to the front end 10A of the shaft 10 . However, it is not determined whether or not the workpiece W is actually attracted to the front end portion 10A of the shaft 10 . Therefore, the pickup of the workpiece W may fail. Therefore, in the present embodiment, before the shaft 10 is moved upward in the Z-axis direction to pick up the workpiece W, it is determined whether or not the pressure in the hollow portion 11 has become sufficiently low. When the pressure in the hollow portion 11 becomes sufficiently low, it can be determined that the workpiece W is attracted to the front end portion 10A of the shaft 10 and the workpiece W can be picked up. Then, when the pressure in the hollow portion 11 becomes sufficiently low, the linear motion motor 30 moves the...
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