Material or article handling – Elevator or hoist and loading or unloading means therefor – Grab
Reexamination Certificate
2001-06-01
2003-05-13
Lillis, Eileen D. (Department: 3652)
Material or article handling
Elevator or hoist and loading or unloading means therefor
Grab
C414S797000
Reexamination Certificate
active
06561749
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a workpiece sucking device for attracting and transporting a workpiece by using a suction member operated by a fluid sucking action under negative pressure.
2. Description of the Related Art
A suction device has hitherto been used which is installed with a suction pad as a means for attracting and transporting a workpiece. The suction device is provided with a buffering mechanism which functions as absorbing the shock generated when the workpiece is attracted by means of the suction pad or when the workpiece is disengaged from the suction pad.
Further, the suction device is provided with a rotation-preventive mechanism for preventing the workpiece from rotating when the workpiece attracted by the suction pad is transported.
In the above suction device, the buffering mechanism and the rotation-preventive mechanism are constructed as separate members respectively.
However, the above suction device has an inconvenience in that it cannot be miniaturized since the buffering mechanism and the rotation-preventive mechanism are separately provided respectively.
Furthermore, when a resin material is used for the suction device, a temperature condition limits an environment where the workpiece suction device can be installed. For example, it is difficult to use the suction device in an environment where the suction device is installed at a high temperature (for example, not less than 100° C.) or at a low temperature (for example, not more than 0° C.).
An object of the present invention is to provide a workpiece sucking device which can be miniaturized and which can be widely used in accordance with the temperature condition in the environment where the workpiece sucking device is installed.
SUMMARY OF THE INVENTION
A buffering mechanism according to the present invention functions as preventing the workpiece from rotating as well as absorbing the shock generated when a workpiece is engaged/disengaged, therefore allowing the workpiece sucking device to be miniaturized. Further, all of constitutive components including a retainer except for a suction member are made of metal materials. Accordingly, the workpiece sucking device can be widely used in accordance with a temperature condition in an environment where the workpiece sucking device is installed.
Preferably, a suction pad functioning as the suction member is formed of conductive fluorine-based rubber composed of vulcanized fluorine-based rubber and carbon black.
REFERENCES:
patent: 3056317 (1962-10-01), Huber et al.
patent: 3702698 (1972-11-01), Schweibel
patent: 3721352 (1973-03-01), Messmer
patent: 3765542 (1973-10-01), White
patent: 3834558 (1974-09-01), Bru
patent: 4537450 (1985-08-01), Baxter
patent: 5393821 (1995-02-01), Shieh et al.
patent: 5422554 (1995-06-01), Rohde
patent: 5430088 (1995-07-01), Ohashi et al.
patent: 5708222 (1998-01-01), Yonezawa et al.
patent: 5893646 (1999-04-01), Mizutani et al.
patent: 5-70630 (1993-03-01), None
patent: 10029182 (1998-02-01), None
Nagai Shigekazu
Yamamoto Masayoshi
Fox Charles A.
Guss Paul A.
Lillis Eileen D.
SMC Kabushiki Kaisha
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