Work holders – With fluid means – Cylinder-piston means in series with additional positioning...
Reexamination Certificate
1999-06-28
2001-02-20
Eley, Timothy V. (Department: 3723)
Work holders
With fluid means
Cylinder-piston means in series with additional positioning...
C269S027000, C269S228000
Reexamination Certificate
active
06189877
ABSTRACT:
This application corresponds to French application 98.08120 of Jun. 26, 1998, the disclosure of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
The invention relates to a device for positioning, holding or gripping, particularly vehicle body parts, of the type comprising a housing containing a moveable equipment displaceable in translation, one end of the moveable equipment being connected to an actuating means and the other end of the moveable equipment being connected to or forming a positioning, gripping or holding member.
DESCRIPTION OF RELATED ART
The actuating means of the moveable equipment can be pneumatic jacks, hydraulic jacks, electric jacks, or any other suitable connection means adapted to transmit actuating force.
A first type of device used particularly for positioning is known by those skilled in the art as a “pilot carrier”.
A second type of de-vice is known to those in the art as a “jointed gripper”.
A third type of device is known to those in the art as a “gripper with shaped ramp”.
In the second and third types of device, the blocking of a holding or gripping arm is generally obtained in a position in which the gripping arm is substantially perpendicular to the axis of force transmission of the actuating means.
All these devices are preferably used in automotive construction, to hold pieces of vehicle body work or sheet metal in the course of various operations of the type of stamping, welding, or any other shaping or intermetallic connection work by machines, assembly or welding robots.
In this application, there is also known the use of housings or modules comprising at least one detector of the position of the moveable equipment or a rod of the actuating means, so as to detect the condition of the device.
Generally speaking, as described for example in German utility model 9215151, the housing of the device is machined to open up an elongated slot permitting disposing adjustable detectors to determine or regulate the position of the member for positioning, gripping or holding in contact with the body work parts.
However, the presence of this elongated slot has the drawback of weakening the body or housing of the device, or alternatively of requiring reinforcement or increasing the thickness of this body or housing.
SUMMARY OF THE INVENTION
The invention has for its object to overcome the above drawbacks, by providing a new device offering high precision of adjustment in positioning, gripping or holding, and freeing the body work parts, by avoiding machining an elongated slot which weakens the device or increases its cost of production.
The invention has for its object a positioning, holding or gripping device, particularly for parts of body work, of the type comprising a housing containing a moveable equipment displaceable in translation, one end of the moveable equipment being connected to an actuating means and the other end of the moveable equipment being connected to or forming a positioning, holding or gripping member, characterized in that the housing has two separate spaced openings, adapted each to receive a detector of the position of the moveable equipment or a rod of the actuating means.
According to other characteristics of the invention:
the device comprises a detection module with two position detectors each inserted within one said housing opening;
the openings are disposed on the side of the rear securement shelf of the device;
the openings are disposed on the side of the lateral securement shelf of the device;
the openings are disposed at an angle on bevels provided between one lateral securement shelf and the rear securement shelf;
the position detectors are mounted on a rigid plate;
the rigid plate carries an electronic bloc;
at least one plate or small plate carrying at least one detector is mounted on the housing with a securement screw;
the rigid plate is pierced with a passage of the securement screw on a support;
the detection module has a dumbbell shape with two blocs connected by an intermediate portion.
REFERENCES:
patent: 4506871 (1985-03-01), Yonezawa
patent: 4673173 (1987-06-01), Shochi et al.
patent: 5034621 (1991-07-01), Groves et al.
patent: 5875417 (1999-02-01), Golden
patent: 5996984 (1999-12-01), Takahashi
patent: 34 03 961 (1995-08-01), None
patent: 297 00 981 U (1997-03-01), None
patent: 0 695 603 (1996-02-01), None
patent: 0 803 331 (1997-10-01), None
patent: 0 849 047 (1998-06-01), None
Boris Jean-Mathieu
Roudier Fabrice
Eley Timothy V.
Genus Technologies
Wilson Lee
Young & Thompson
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