11  EP 3 800 006 A1 12  [0039] Referring to Figs. 7 to 10, a description will be given of another embodiment of the method of working the glass plate 2 by the glass-plate working apparatus 1 in accordance with the above-described embodiment. [0041] As shown in Fig. 8, after the movement of the working heads 7 and 11, by using the moving means 10, the moving stand 75 of the moving means 10 is moved in the Y direction by operating the servo motor 78 of the cuttingamountadjusting means 64 ofthemoving means 10 so as to cause the grinding wheel 25 of the working head 7 to be brought into contact with the glass plate 2 and grind the vicinity of the working point A of the glass plate 2. Meanwhile, after the movement of the working heads 14 and 18, by using the moving means 17, the moving stand 75 of the moving means 17 is moved in the Y direction by operating the servo motor 78 of the cuttingamountadjusting means 64 ofthemoving means 17 so as to cause the grinding wheel 25 of the working head 14 to be brought into contact with the glass plate 2 and grind the vicinity of the working point B of the glass plate 2. [0042] As shown in Fig. 9, after the grinding of the vi- cinity of the working point A of the glass plate 2 by the working head 7, the grinding wheel 25 of the working head 7 is moved by the moving means 10 in the X2 di- rectionfromthe working pointA ofthe glass plate 2 along the end face in the region R1 of the glass plate 2 in a state of contact with the glass plate 2, to thereby grind a [0044] After the return of the working heads 7, 11, 14, and 19, the glass plate 2, whose both end faces 6 and 13 have been ground, is transported and carried out by [0043] As shown in Figs. 9 and 10, the working head 7 is further moved in the X2 direction along the end face in the region R1 ofthe glass plate 2 by the movingmeans 10, so as to cause the grinding wheel 25 of the working head 7 to grind the end face in the remaining region of the region R1 of the glass plate 2. During the movement of the working head 7 in the X2 direction by the moving means 10, the working head 11 is moved by the moving means 12 in the X1 direction from the working point A of the glass plate 2 along the end face in the regions R3 and R2 of the glass plate 2, so as to cause the grinding wheel 25 of the working head 11 to grind the end face in the regions R2 and R3 oftheglass plate 2,and the work- ing heads 7 and 11 are respectively returned to the po- sitions shown in Fig.10 by the moving means 10 and 12. Meanwhile, the working head 14 is further moved in the X2 direction along the end face in the region R4 of the glass plate 2 by the moving means 17, so as to cause the grinding wheel25 ofthe working head 14 to grind the end face in the remaining region of the region R4 of the glass plate 2. During the movement of the working head 14 in the X2direction by the moving means 17, the work- ing head 18 is moved by the moving means 19 in the X1 direction from the working point B of the glass plate 2 along the end face in the regions R6 and R5 of the glass plate 2,so astocause the grinding wheel25 of the work- ing head 18 to grind the end face in the regions R5 and R6 of the glass plate 2, and the working heads 14 and 18 are respectively returned to the positions shown in Fig. 10 by the moving means 17 and 19. partoftheendface inthe region R1 bythe grinding wheel 25 of the working head 7. During the movement of the working head 7 in the X2 direction by the moving means 10, by using the moving means 12, the moving stand 75 of the moving means 12 is moved in the Y direction by operating the servo motor 78 of the cutting amount ad- justing means 64 ofthe movingmeans12 so asto cause the grinding wheel 25 of the working head 11 to brought into contactwith the working pointA ofthe glass plate 2.Meanwhile,afterthe grinding ofthe vicinityofthe working point B of the glass plate 2 by the working head 14,the grinding wheel25 oftheworking head 14 ismoved by the moving means 17 in the X2 direction from the working point B of the glass plate 2 along the end face in the region R4 of the glass plate 2 in a state of contact with the glass plate 2, to thereby grind a part of the end face in the region R4 by the grinding wheel 25 of the working head 14. During the movement of the working head 14 in the X2 direction by the moving means 17, by using the moving means 19, the moving stand 75 of the moving means19 ismoved in the Y direction by operating the servo motor78ofthe cutting amountadjusting means 64 of the moving means 19 so as to cause the grinding wheel25 ofthe working head 18 to be broughtinto contact with the working point B of the glass plate 2. 5 [0040] As shown in Figs. 7 and 8, with respect to the glass plate 2 sucked and fixed atthe working position for the glass plate 2 by means of the pair of sucker devices 40, the working head 7 is moved by the moving means 10 from the one end 8 of the end face 6 of the glassplate 2 to the working point A of the glass plate 2 in a state of noncontactwith the end face in the region R1 ofthe glass plate 2, and during the movement of the working head 7 in the X1 direction from the one end 8 of the end face 6 of the glass plate 2 to the working point A of the glass plate 2 by the moving means 10, the working head 11 is moved by the moving means 12 from the other end 9 of the end face 6 of the glass plate 2 to the vicinity of the central portion on the end face 6 side of the glass plate 2 in astate ofnoncontactwith theend face in the regions R2 and R3 of the glass plate 2. Meanwhile, the working head 14 is moved by the moving means 17 in the same way as the moving means 10 from the one end 15 of the end face 13 of the glass plate 2 to the working point B of the glass plate 2 in a state of noncontact with the end face in the region R4 of the glass plate 2, and during the movement of the working head 14 in the X1 direction from the one end 15 of the end face 13 of the glass plate 2 to the working pointB ofthe glass plate 2 by the moving means 17, the working head 18 is moved by the moving means19in the same way as themovingmeans 12 from the other end 16 of the end face 13 of the glass plate 2 to the vicinity of the central portion on the end face 13 side of the glass plate 2 in a state of noncontact with the end face in the regions R5 and R6 of the glass plate 2. 25 20 10 15 30 35 40 45 50 55 7