Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly
Patent
1992-05-01
1993-10-12
Ramsey, Kenneth J.
Electric lamp or space discharge component or device manufacturi
Process
With assembly or disassembly
445 66, H01J 934
Patent
active
052520994
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method for assembling the tube of a monitor on a front frame of the monitor, the monitor thus obtained, and an assembly machine employing the method.
In monitor manufacturing methods, it is known to mount the tube on a rear box and then to center the frame on the front of the monitor with respect to this assembly.
Another method of mounting a monitor tube, as taught by German Patents 35 43 433 and 37 13 939, consists in centering the tube with respect to the front face formed by the frame, but this method makes it necessary to provide centering elements, which make the design of the front face more complex and impose much closer tolerances on the assembly.
A first object of the invention is accordingly to enable assembly of a tube on the front of a monitor, while assuring its centering in a simple manner. This object is attained in that the method of assembling the tube of a monitor on a front frame of the monitor includes the following steps: concentrically and simultaneously, while the tube is in suspension; V shaped support blocks with a delay period; face to place it into contact with zones having a high coefficient of adhesion; set.
In another characteristic, between the step a) and b), the method includes a step of placement of cushioning disks.
In another embodiment of the invention, the invention is characterized, between step d) and e), by the step of placing cushioning disks on the tube and placing a case on the cushioning disks.
Another object of the invention is to provide a machine for assembling a monitor tube on the front frame that can be fully automated, is simple and sturdy, and which makes it possible to obtain high-precision centering of the tube.
This object is attained in that the machine for assembling a monitor tube on a front frame includes a table having a housing adapted to receive a frame which forms the front face of the monitor, the housing including an opening in its center, a suction or blower nozzle that is movable along a vertical axis passing through the center of symmetry of the housing and adapted to be actuated by a jack, a centering device to be actuated by a jack for centering the cathode ray tube, and a set of two movable platforms for crosswise displacement by jacks to place the fixation tools into position.
In accordance with an additional embodiment of the invention, the invention is characterized in that the centering device is constituted by a pair of sets of columns mounted vertically on the table and supporting rollers on their end, each set forming a rolling track for centering plates disposed on either side of the opening, said centering plates including a substantially V shaped cutout forming a supporting block, the cutout conforming in shape and size to the tube and an oblique groove inclined so as to control the approach toward one another of the centering plates upon the displacement of jack-controlled actuating prongs.
In accordance with another embodiment of the invention, the invention is characterized in that the actuation prongs are connected with a U-shaped part actuated by a single jack, the legs of the U-shaped part adapted to slide between the rollers in a direction perpendicular to the direction of the centering plates.
In yet another embodiment, the invention is characterized in that the two platforms slide between the rollers and support tools for screwing, welding or gluing the set together.
A final object of the invention is a monitor, the assembly of which is simplified.
This object is attained in that the monitor includes a front face in the form of a frame on which the cathode ray tube of the monitor is adapted to be centered, said frame including fixation means at the corners, to which means attachment pads, connected to the four corners of the tube, are adapted to be affixed with the aid of cushioning disks disposed between the front face and the tube and between the tube and the case, the set being enclosed in the case by the fixation tabs which are adapted to be placed, with the aid of cushioning d
REFERENCES:
patent: 4820224 (1989-04-01), Lemche
patent: 4902258 (1990-02-01), Dunsmore et al.
Patent Abstract of Japan, vol. 1, No. 165, Dec. 26, 1977, and JP-A-52 111 327, Sep. 19, 1977.
Clain Jean-Michel
Latte Eric
Piguillem Francois
Bull S.A.
Ramsey Kenneth J.
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