9  EP 3 800 006 A1 10  end face in the region R6 of the glass plate 2. [0033] As shown in Fig. 6, afterthe grinding ofthe end face in the regions R1, R2, and R3 of the glass plate 2 by the moving means 10 and 12, the working head 7 is further moved in the X2 direction by the moving means 10, and during the movement of the working head 7 in the X2 direction by the moving means 10, the working head 11 is moved from the working point A of the glass plate 2 in the X1 direction by the moving means 12, to thereby return the working heads7and 11 to the positions shown in Fig.6 by the moving means 10 and 12, respec- tively. Meanwhile, after the grinding of the end face in the regions R4, R5, and R6 of the glass plate 2 by the moving means 17 and 19, the working head 14 is further moved in the X2 direction by the moving means 17, and during the movement of the working head 14 in the X2 direction by the moving means 17, the working head 18 is moved from the working point B of the glass plate 2 in the X1 direction by the moving means 19, to thereby re- turn the working heads 14 and 19 to the positions shown in Fig. 6 by the moving means 17 and 19, respectively. means 19 are respectively adapted to move the working head 14 in the X1 direction along the end face in the region R4 oftheglassplate 2 and move theworking head 18 in the X2 direction along the end face in the region R5 of the glass plate 2, respectively, so as to cause the working head 14 and the working head 18 to approach each other. [0038] In this embodiment, the moving means 10 is adapted to move the working head 7 in the X1 direction along the end face in the region R1 of the glass plate 2 to thereby cause the grinding wheel 25 of the working head 7 to grind the end face in the region R1 of the glass plate 2, while the moving means 12 is adapted to move the working head 11 in the X2 direction along the end face in the regions R2 and R3 of the glass plate 2 to therebycause the grinding wheel25 ofthe working head 11 to grind the end face in the respective regions R2and R3 of the glass plate 2, so as to effect the grinding of the end face 6 of the glass plate 2. Meanwhile, the moving means 17 is adapted to move theworking head 14 in the X1 direction along the end face in the region R4 of the glass plate 2 to thereby cause the grinding wheel 25 of the working head 14 to grind the end face in the region R4 of the glass plate 2, while the moving means 19 is adapted to move the working head 18 in the X2 direction along the end face in the regions R5 and R6 of the glass plate 2 to thereby cause the grinding wheel 25 of the working head 18 to grind the end face in the respective regions R5 and R6 of the glass plate 2, so as to effect the grinding of the end face 13 of the glass plate 2. On the otherhand,the following arrangementmay be adopt- ed in substitution forthis arrangement.As shownin Figs. 7 to 10, the moving means 10 is adapted to move the working head 7 from the working point A of the glass plate 2intheX2 direction along the endface in the region R1 of the glass plate 2 to thereby cause the grinding wheel 25 of the working head 7 to grind the end face in the region R1 ofthe glass plate 2,while themoving means 12 is adapted to move the working head 11 from the working point A of the glass plate 2 in the X1 direction along the end face in the regions R3 and R2 of the glass plate 2 to thereby cause the grinding wheel 25 of the working head 11 to grind the end face in the regions R3 and R2 of the glass plate 2, so as to effect the grinding of the end face 6 of the glass plate 2. Meanwhile, the moving means 17 is adapted to move the working head 14 from the working point B of the glass plate 2 in the X2 direction along the end face in the region R4 of the glass plate 2 to thereby cause the grinding wheel 25 of the working head 14 to grind the end face in the region R4 ofthe glass plate 2,while the moving means 19 isadapted to move the working head 18 from the working point B of the glass plate 2 in the X1 direction along the end face in the regions R6 and R5 of the glass plate 2 to thereby cause the grinding wheel 25 of the working head 18 to grind the end face in the regions R6 and R5 of the glass plate 2, so as to effect the grinding of the end face 13 of the glass plate 2. [0034] After the return of the working heads 7, 11, 14, and 19, the glass plate 2, whose both end faces 6 and 13 (the respective end faces in the regions R1, R2, and R3 and the regions R4, R5, and R6) have been ground, is carried out by the transporting means 5 from the sup- porting table 4 to the downstream side 200 while being sucked and fixed by means of the sucker device 50. [0035] The moving means 10 allows the end face in the region R1 of the glass plate 2 to be ground by the grinding wheel25 ofthe working head 7,while the moving means 12 allows the end face in the respective regions R2 and R3 ofthe glass plate 2 tobegroundbythe grinding wheel 25 of the working head 11, to thereby effect the grinding ofthe end face 6ofthe glass plate 2.Meanwhile, the moving means 17 allows the end face in the region R4 ofthe glassplate2 to be ground by the grinding wheel 25 of the working head 14, while the moving means 19 allows the end face in the respective regions R5 and R6 of the glass plate 2 to be ground by the grinding wheel 25 of the working head 18, to thereby effect the grinding of the end face 13 of the glass plate 2. [0036] In this embodiment, in the grinding of the end face in each of the region R1 of the glass plate 2 by the grinding wheel 25 of the working head 7 and the region R2 of the glass plate 2 by the grinding wheel 25 of the working head 11, the moving means 10 and the moving means 12 are respectively adapted to move the working head7 in theX1 direction along theend face in the region R1 of the glass plate 2 and move the working head 11 in the X2 direction along the end face in the region R2 of the glass plate 2,respectively,so as tocause the working head7 and the working head 11 to approach each other. [0037] In this embodiment, in the grinding of the end face in each of the region R4 of the glass plate 2 by the grinding wheel 25 of the working head 14 and the region R5 of the glass plate 2 by the grinding wheel 25 of the working head 18, the moving means 17 and the moving 55 6 50 45 40 35 30 25 20 15 10 5