Abrading – Precision device or process - or with condition responsive... – With feeding of tool or work holder
Reexamination Certificate
2000-11-09
2002-10-08
Eley, Timothy V. (Department: 3723)
Abrading
Precision device or process - or with condition responsive...
With feeding of tool or work holder
C451S044000, C451S070000
Reexamination Certificate
active
06461223
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a glass plate working machine suitable for forming a window glass for an automobile, etc., by breaking an unshaped glass plate.
BACKGROUND ART
A glass plate working machine is known, wherein a table in a cutting unit on which an unshaped glass plate is placed and a table in a grinding unit on which the broken glass plate is placed are adapted to be moved by one electric motor in one direction in a horizontal plane, a cutting head in the cutting unit for forming a cutting line on the unshaped glass plate and a grinding head in the grinding unit for grinding an edge of the broken glass plate are adapted to be moved by one electric motor as well in another direction perpendicular to one direction in a horizontal plane.
In such a glass plate working machine, it is quite easy and preferable that both tables are each moved mutually synchronously and that the cutting head and the grinding head are each moved mutually synchronously, since the source of the operation to move them is one electric motor. However, the transmitting mechanism for informing the rotation of one electric motor to each of the tables and the transmitting mechanism for informing the rotation of one electric motor to the cutting head and the grinding head are complicated, the distance of the information route is long, and further, it is difficult that the glass plate working machine is arranged to include the perfectly same transmitting mechanisms with respect to backlash or the like.
Accordingly, in the above mentioned glass plate working machine, it is not always possible to move accurately synchronously each of both tables and each of the cutting head and the grinding head mutually because of the difference of the length of the transmitting mechanism, the difference of the backlash of the transmitting mechanism or the like.
The present invention has been made in view of the above problems. It is an object of the present invention to provide a glass plate working machine which is capable of moving the table in the cutting unit on which an unshaped glass plate is placed and the table in the grinding unit on which the broken glass plate is placed accurately synchronously.
It is another object of the present invention to provide a glass plate working machine which is capable of moving the cutting head in the cutting unit for forming a cutting line on the unshaped glass plate and the grinding head in the grinding unit for grinding the edge of the broken glass plate accurately synchronously.
DISCLOSURE OF THE INVENTION
The glass plate working machine according to the first aspect of the present invention comprises a cutting unit for forming a cutting line on an. unshaped glass plate to break the unshaped glass plate, a grinding unit for grinding an edge of the glass plate broken along the cutting line, a glass plate conveyer unit for conveying the glass plate sequentially through the cutting unit and the grinding unit, and control means connected to the cutting unit and the grinding unit for controlling the cutting unit and the grinding unit, respectively, the cutting unit including a table of the cutting unit on which the unshaped glass plate is placed, and an electric motor for moving the table of the cutting unit in one direction, the grinding unit including a table of the grinding unit on which the broken glass plate is placed, and an electric motor disposed separately from the electric motor of the cutting unit, for moving the table of the cutting unit in one direction for moving the table of the grinding unit in one direction, the electric motor of the cutting unit and the electric motor of the grinding unit being adapted to be operated synchronously by the control means to move the table of the cutting unit and the table of the grinding unit concurrently in one direction.
Since the glass plate working machine according to the first aspect of the present invention comprises the electric motor for moving the table of the cutting unit in one direction and the electric motor for moving the table of the grinding unit in one direction, and is arranged such that both of the electric motors are operated synchronously by the control means, the distance between respective electric motor and the table of the cutting unit or the table of the grinding unit can be made shorter, simple transmitting mechanism can be adopted, the difference of the backlash or the like of the transmitting mechanism can be minimized, and further, the deviation of the position between the table of the cutting unit and the table of the grinding unit based on the difference of the backlash or the like of the transmitting mechanism can be adjusted individually by the controlling means. Therefore, the table in the cutting unit on which an unshaped glass plate is placed and the table in the grinding unit on which the broken glass plate is placed can be moved accurately synchronously.
The glass plate working machine according to the second aspect of the present invention is arranged such that the table of the cutting unit and the table of the grinding unit are connected to each other through an intermediate connecting plate in the glass plate working machine according to the first aspect.
In the glass plate working machine according to the second aspect, since the table of the cutting unit and the table of the grinding unit are connected to each other through the intermediate connecting plate, the deviation of the position between the table of the cutting unit and the table of the grinding unit can be reduced furthermore, therefore, the table in the cutting unit on which an unshaped glass plate is placed and the table in the grinding unit on which the broken glass plate is placed can be moved more accurately synchronously.
The glass plate working machine according to the third aspect of the present invention comprises a breaking unit provided between the cutting unit and the grinding unit for breaking the unshaped glass plate along the cutting line, the control means being connected to the breaking unit such that while the cutting unit and the grinding unit are in motion, the breaking unit performs an operation concurrently, in the glass plate working machine according to the first or second aspect.
In the glass plate working machine according to the third aspect, since the breaking unit performs an operation concurrently while the cutting unit and the grinding unit are in motion, time for working the glass plate is reduced considerably.
The glass plate working machine according to the forth aspect of the present invention comprises a breaking unit provided between the cutting unit and the grinding unit for breaking the unshaped glass plate along the cutting line, the control means being connected to the breaking unit such that while the cutting unit and the grinding unit are in motion, the breaking unit performs an operation concurrently, the table of the cutting unit and the table of the grinding unit being connected to each other through an intermediate connecting plate disposed across the breaking unit, in the glass plate working machine according to the first aspect.
In the glass plate working machine according to the forth aspect, since the breaking unit performs an operation concurrently while the cutting unit and the grinding unit are in motion, time for working the glass plate is reduced considerably, and further, since the table of the cutting unit and the table of the grinding unit are connected to each other through the intermediate connecting plate provided across the breaking unit, the deviation of the position between the table of the cutting unit and the table of the grinding unit can be reduced furthermore. Therefore, the table in the cutting unit on which an unshaped glass plate is placed and the table in the grinding unit on which the broken glass plate is placed can be moved more accurately synchronously.
The glass plate working machine according to the fifth aspect of the present invention is arranged such that the cutting unit includes a cutting head for forming the cutting line on
Bando Kiko Co., Ltd.
Eley Timothy V.
Nixon & Vanderhye P.C.
Thomas David B.
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