Patent GB-1453777-A (GB)
Title: Wood working machines
IPC: B23Q37/00
Filed: 1974-11-06
Abstract: 1453777 Woodworking machines JONSEREDS FABRIKERS AB 6 Nov 1974 [7 Nov 1973] 48072/74 Heading B5L A woodworking machine including a frame and machine components carried by the frame comprises at least one motor-driven spindle for a rotary woodworking tool, a motor-driven feed mechanism for feeding workpieces to the woodworking tool, and adjustable guide means for guiding workpieces to and away from the tool and for keeping each workpiece engaged with a supporting surface during working, wherein the or each motor-driven spindle and bearing and driving means therefor are assembled into a self-contained woodworking unit which is detachably mounted in the machine frame and composed of two subunits which are detachable from one another, one of said subunits being a spindle unit comprising said spindle, a spindle bearing housing, said spindle being mounted in bearings in said housing, and means for connecting said spindle to a motor-driven transmission, the other subunit being a supporting unit including a support, a slide housing supported by said support and a first slide member which has an open-ended chamber for receiving said spindle unit and is slidably supported on said housing for axial adjustment of the spindle and consequently for setting of the tool along a first axis in relation to a path along which the workpiece is moved by said feed and guide mechanisms, said spindle unit and said chamber so arranged that the spindle unit is insertable in and withdrawable from the chamber and is axially and radially lockable in a reference position in the chamber by releasable locking means, and said support is arranged to be movably supported as a second slide member by guiding means supported by the machine frame to permit adjustment of the tool along a second axis which is perpendicular to said first axis, and wherein said woodworking unit also comprises means for releasably supporting said spindle drive motor with said transmission releasably connected to the spindle. A workpiece 21 to be machined enters a housing enclosing the machine at an inlet 6a and passes via fixed and adjustable guides 22, (23) to feed means comprising upper and lower feeders 13, 14. The upper feeder bears on the workpiece under adjustable spring load and is adjustable by motor-driven screw and nut mechanism 40, 42 for the thickness of the workpiece. Each feeder comprises two parallel chains with a set of transverse rods. The upper and lower cutters 9, 10 to which the timber 21 is fed comprise identical spindle units (Fig. 9, not shown) which are insertable as exchangeable "cartridges" into a carrier member comprising a tube (61, Figs. 7, 8, not shown). The tube (61) is axially slidable, for axial adjustment of the cutter, in a tool saddle (79, Figs. 6, 7, 8, not shown) and the tool saddle (79) is vertically slidable in a holder fixed to the machine frame, for vertical adjustment of the cutter. Axial adjustment is effected by a motor and gear drive to an axially fixed gear (81, Fig. 7) having an internally threaded hub engaged with a thread on the end of the tube (61). Vertical adjustment is effected by gear drive from the same motor to a screw and nut mechanism. Electrically releasable spring loaded clamps fix the tube and tool saddle in adjusted positions. The discharge table 17 is vertically adjustable and an adjustable hold down device 26 is provided as well as fixed and adjustable guide fences. The whole machine is enclosed in a noise-attenuating, dust-confining housing interrupted only by the inlet 6a and outlet 6b for the workpiece, the front panel of the machine having a set of removable panels or doors providing access to the various machine components and controls, the design of which is such as to allow removal/replacement as distinct units or subunits. The machine may be provided with side-cutter units identical with the cutter units 9, 10. Photoelectric pulse counting means are provided for co-operation with indexing discs (Fig. 14, not shown) linked to the gearing for axial and vertical adjustment of the tool, precise determination and control of the tool position therefore being possible. This control can be arranged to operate in conjunction with corresponding control means used in grinding and sharpening the cutters whereby a replacement tool unit can be adjusted automatically to a reference position determined during grinding.