Patent GB-638367-A (GB)
Title: Machine for the manufacture of small parquet floor-blocks
IPC: B21G1/00
Filed: 1947-05-02
Abstract: 638,367. Making parquet blocks; sawing. BURNER, F. SUFFERT-. May 2, 1947, No: 11925. Convention date, May 3, 1946. [Classes 145 (i) and 145 (ii)] In a machine for the manufacture of parquet floor-blocks, laths 12 fed by rollers 6, 13 are cut to exact length by means of a pair or pairs of circular dividing saws 16, (17), a block 19 thus formed then passing via shoots 22, 21 to a horizontal rotary chuck-plate 23 with jaws for gripping the block, which chuck brings the block round to a second pair of saws 43, 44 which cut it to correct depth, after which it is released to a second chuck-plate 23a rotating in a vertical plane which brings the block round . to at least two further saws 96 which cut it to exact width, the finished block being discharged between the plates 113, 114, (Fig. 1). Preferably three dividing saws 96 are used to produce finally two finished blocks. A motor and gears 58 through a belt 57 drive both chuck-plates, and feed-rollers 6, 6a ; and by means of the eccentric cam 74 mounted on the shaft 72, the saws 16, 17 and their motor 15 which are pivoted at 82 (see Fig. 3), are tilted through the angle W towards and away from the laths 12 to cut them into blocks 19 by the action of the connecting-rod 76 and lever 80. Stops 25, 26 are provided up to which the laths are fed prior to being cut, these stops being normally actuated by the pawl 90 ; should it be desired to cut out a faulty section the pawl is pushed out of engagement with the bolt 79 by actuation of the stop 95, the stops 25, 26 and saws 16 being now free to be pivoted by hand to cut the lath where desired to avoid such fault. A block 19 falls from the shoot 21 by gravity and the help of an air blast 4<SP>1</SP> on to the fixed plate 42 and between one pair of the jaws of the chuck-plate 23, one jaw 27 being fixed and the other 28 displaceable and controlled by springs 32, which tend to maintain the jaws apart and 38 which, being attached at one end to a lever 37, tends to close them (see Fig. 5). On rotation of the chuck about the cam 35, which is kept fixed by a rod 52, the levers 37 are actuated to increase the tension in springs 38 to cause the jaws to clamp the block 19. Horizontal saws 43, 44, driven by a motor 108 and pivoted for adjustment at 112, then cut the block to the desired depth. Further rotation of the chuck 23 brings the block 19 over a similar jaw-opening in the vertical chuck-plate 23a (see Fig. 2), the movable jaws of which are actuated by a fixed cam 35a. An air blast 4<SP>1</SP> again helps the transfer of the block to the second chuck-plate which on rotation presents it to the saws 96 driven by motor 95<SP>1</SP> which cut it to desired width, the jaws of the chuck having slots to allow the use of a third (dividing) saw. On opening of the jaws the block or blocks fall on to the plate 113 and are carried round and finally ejected with the aid of an air blast at 114. In an alternative arrangement, Fig. 9 (not shown), the block on leaving the chute 21 is pushed into the jaw-gap of the horizontal chuck-plate by a pusher 115 actuated by a cam 119 on the chuck-plate, the finished block being ejected by a further lever 125 actuated by a cam 129 on the vertical chuck-plate. The clamping jaws 27a, 28a and 27b, 28b of the chuck-plates are also shaped so that they can mutually engage (Fig. 10), so that with a suitable design of cams 35, 35a, the jaws of the vertical chuck-plate 23c will close on the block before the jaws of the horizontal chuck 23b have opened; hence when the latter open the block is automatically transferred from one chuck to the other.