EP 3 800 006 A1 18  worked. 17  the driving means 63 for moving the traveling table 60 in the X direction and the servo motor 78 of the cutti amountadjusting means 64 formovingthe moving stand 75 in the Y direction are numericallycontrolled,the work- ing heads 7, 11, 14, and 18 are also capable of effecting corner cutting (cornering) of four corners of the glass plate 2 (the one end 8 and the other end 9 of the end face 6 of the glass plate 2 and the one end 15 and the other end 16 of the end face 13 of the glass plate 2). [0063] In thisembodiment,thedriving means 54 ofthe transporting means 5 includes the rack 55 which is dis- posed on the base 3 and extends in the X direction in parallel therewith; the pinion gear 56 meshing with the rack 55; and the servo motor 57 which has the output rotating shaft (motor shaft) with the pinion gear 56 fitted at one end thereof and is mounted on the traveling table 52. Alternatively, however, the driving means 54 may in- clude a ball screw nut, a ball screw engaged threadedly with the ball screw nut, and a servo motor which is cou- pled to the ball screw, in which case the transporti means5 iscapable oftransporting theglass plate 2 more precisely with respect to the supporting table 4. [0064] In this embodiment, the driving means 63 each of the moving means 10, 12, 17, and 19 includes the rack 70 which is disposed on the traveling table 60 and extends in the X direction in parallel therewith; the pinion gear 71 meshing with the rack 70; and the servo motor72 which has the outputrotating shaft(motorshaft) with the pinion gear 71 fitted at one end thereof and is mounted on the traveling table 60. Alternatively, howev- er, the driving means 63 may include a ball screw nut, a ball screw engaged threadedly with the ball screw nut, and a servo motor which is coupled to the ball screw, in which case each of the moving means 10, 12, 17, and 19 iscapable ofeffecting working more preciselyby each of the working heads 7, 11, 14, and 18 in the working of the glass plate 2. [0065] In this embodiment, in the working of the end face 6 of the glass plate 2, an arrangement may be pro- vided such that, as the servo motors 72 of the driving means 63 of the moving means 10 and 12 and the servo motors 78 of the cutting amount adjusting means 64 are numericallycontrolled synchronously,the end face in the region R1 of the glass plate 2 and the end face in the respective regions R2 and R3 of the glass plate 2 are simultaneously worked. In the working of the end face 13 ofthe glass plate 2,an arrangementmay be provided such that, as the servo motors 72 of the driving means 63 ofthe moving means 17 and 19 and the servo motors 78 of the cutting amount adjusting means 64 are numer- icallycontrolled synchronously,the end face in the region R4 ofthe glassplate 2 and the end face in the respective regions R5 and R6 ofthe glass plate 2 are simultaneously 55 50 45 40 35 30 at least one first working head means for effect- ing grinding or polishing, or both grinding and polishing,ofan end face in one region ofa glass plate; a first moving means for moving said at least one firstworkinghead meansalong theend face in the one region of the glass plate; at least one second working head means for ef- fecting grinding orpolishing,orboth grinding and polishing,ofan end face in anotherregion ofthe glass plate; and a second movingmeans formoving saidatleast one second working head means along the end face in the other region of the glass plate. 25 20 15 10 [0062] In this embodiment, the working heads 7, 11, 14, and 18 may effect chamfering of the glass plate 2 together with the working of both end faces 6 and 13 of the glass plate 2, or may effect chamfering together with corner cutting of four corners of the glass plate 2. 5 [0066] DESCRIPTION OF REFERENCE NUMERALS Claims 1: glass-plate working apparatus 2: glass plate 3: base 4: supporting table 7, 11, 14, 18: working head 10, 12, 17, 19: moving means 62: guide rail 1. A glass-plate working apparatus comprising: 2. The glass-plate working apparatus according to claim 1, wherein said first moving means is adapted to move said at least one first working head means along the end face in the one region of the glass plate to cause said at least one first working head means to work the end face in the one region of the glass plate,and saidsecond moving means isadapt- ed to move said at least one second working head means along the end face in the other region of the glass plate to cause said atleastone second working head means to work the end face in the other region of the glass plate. 3. The glass-plate working apparatus according to claim1 or2,wherein each ofsaid firstmoving means and said second moving means is adapted to move each of said at least one first working head means and said at least one second working head means such that said at leastone first working head means and said at least one second working head means approach each otherormove awayfromeach other. 4. The glass-plate working apparatus according to any one of claims 1 to 3, wherein said at least one first 10