Geometrical instruments – Gauge – Collocating
Reexamination Certificate
1999-07-08
2001-11-13
Ackun, Jr., Jacob K. (Department: 3712)
Geometrical instruments
Gauge
Collocating
C033S520000
Reexamination Certificate
active
06314656
ABSTRACT:
The invention relates to a device for positioning and centering, particularly of a piece for automobile body work, of the type comprising a body having an actuating means to actuate the centering means adapted to move between a near position in which the piece is disengaged and a spaced centering position for the piece.
There are known devices of this type, generally called “guide carriers” by specialists: these known devices generally comprise a jack, preferably pneumatic, a detection module for the raised and lowered positions, holding means in center position of the piece and a casing for movement comprising at least two pieces adapted to move between a near disengaged position and a spaced centering position.
The displacement of said pieces generally takes place along a path comprised between 2 and 100 mm, the sought accuracy of centering is preferably better than 0.05 mm, whilst the holding force in centered position is generally less than 100 daN.
Because the displacement of said pieces takes place transversely to the direction of movement of the actuating means, mechanical transmission means are necessary to translate the movement of the actuating jack and to obtain movement of said pieces: these movement translating means are generally constituted by cams, levers or swinging squares articulated about an axle secured to the body of the device.
In practice, the desired accuracy of 0.05 mm for centering is difficult to obtain by existing devices, given the need to take particular precautions for wear, which increases its cost of production.
The invention has for its object to overcome the drawbacks of the prior art, by providing an improved device, simple to produce and economical, permitting obtaining the desired accuracy or even better, without excessive cost of production.
The invention has for its object a device for positioning and centering, particularly a piece of automobile body work, of the type comprising a body with at least one actuating means to actuate the centering means, adapted to move between a near disengaged position and a spaced centering position, characterized by the fact that the centering means are moved by elements mounted slidably and making an angle with the direction of movement of the actuating means so as to improve the accuracy and the concentricity of the centering to be obtained.
According to other characteristics of the invention:
each centering means is slidably mounted in a guide slot,
each centering means is slidably mounted relative to a cover beneath a protective member substantially sealed against impurities, dirt, cuttings or the like,
each element forming an angle with the direction of movement of the actuating means is mounted captively relative to a centering means and is mounted slidably relative to a head secured to the actuating means,
each element making an angle with the direction of movement of the actuating means is mounted captively relative to a head secured to the actuating means and mounted slidably relative to a centering means,
the angle formed by one element with the direction of the actuating means is less than a predetermined value of about five degrees of arc, so as to obtain self-blocking of the element in case of inoperativeness or release of the actuating means,
the device comprises resilient anti-reversing blocking means, so as to maintain the centering obtained in the case of release or ineffectiveness of the actuating means,
the device comprises an arrangement in which the centering means are mounted captively and displaceably, and this arrangement has passage openings for said slidably mounted elements,
said arrangement has a removable cover and a base comprising said passage openings,
the slidably mounted elements are moved apart radially by a head secured to the actuating means.
REFERENCES:
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patent: 2842860 (1958-07-01), Gray
patent: 3345755 (1967-10-01), Ferebee
patent: 3975830 (1976-08-01), Lopacki
patent: 4356635 (1982-11-01), Chung
patent: 5377421 (1995-01-01), Isler
patent: 5437105 (1995-08-01), Work
patent: 297 00 886 (1997-04-01), None
patent: 2 757 437 (1998-06-01), None
Morel Michel
Roudier Fabrice
Ackun Jr. Jacob K.
Francis Faye
Genus Technologies
Young & Thompson
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