FI71258C - FOERFARANDE FOER INRIKTNING AV ETT TIMMERBLOCK - Google Patents

Description

71258

Method for directing only For the purpose of directing the timmerblock

The present invention relates to a method for directing a blank fed to a machine tool, in which the blank is fed longitudinally past a measuring station, after which the blank is corrected transversely to the wool, its unmachined surface sawn into boards.

The mere orientation with respect to the sawing line substantially affects the yield of each log. The orientation alone usually occurs, as shown, for example, in Finnish application publication 761401, from its uneven unmachined surfaces, in which case the shell or other soft objects visible in the optical measurement can cause orientation errors.

15

The above-mentioned drawback can be avoided by the method according to the invention, which is characterized in that in addition to the optical measurement, which determines the shape and the contour of the flat surface, the position of the possible points of action of the orienting members 20 and their vicinity is measured by a mechanical member.

An advantage of the invention is not only to avoid inaccuracies caused by the untreated surface, that the quality of the sawn surface alone and the sheer shape can be determined by simply passing the measuring device and that the same measuring device can serve two directing devices.

The invention will now be described in more detail with reference to the accompanying drawings, in which Figure 1 shows a schematic top view of the apparatus according to the invention, Figure 2 shows a section AA of the apparatus of Figure 1 on a larger scale, 271258 Figure 3 shows a side view of the apparatus shown in Figure 2, and Figure 4 shows the illuminated passing past the measuring station as a mere perspective view.

5

In the figures, reference numeral 1 denotes a mere one from a chipper or saw machine 2 having two opposite smooth, sawn surfaces 3 and 4 and two opposite uneven, un sawn surfaces 5 and 6 (Figure 2). The apparatus 10 comprises a measuring station 7, in which the profile, the shape of the sawn surfaces and possibly also the quality of the vertical support rollers 8 running in a vertical position can be determined. After the measuring station, the mere one is poured on its side and moved by the conveyor 9 against the transversely adjustable orienting members 10, where the mere orientation 15 is corrected. The blade is then moved on the conveyors 11 and 12, still maintaining its direction for sawing in the jigsaw 13.

At the measuring station, only the illuminators 17 arranged on each side 20 are illuminated and the side profile and the contours of the sawn surfaces 3 and 4 are measured in a manner known per se by means of optical measuring devices connected to a suitable computing device, e.g. a microprocessor. In addition, the upper side alone is measured by a mechanical member 14, 25 which is pressed against the unmachined surface 5 alone and whose position changes are monitored electronically as it simply moves through the measuring station. The plain is pressed with the same force and a member of the same shape, e.g. a roller, which is used in its orientation. In this case, the possible soft part on the surface of the upper 30 alone is as flexible as in the final layout. By following the trajectory of the member 14, a trend close to the branch or other deformation that can cause the trend to fail can be avoided.

35 The calculator optimizes the position and orientation with the best yield for the sawing line alone. The calculating device is connected to devices (not shown) for moving the orienting members 10 in the transverse direction only. The plain is poured on its side so that the mechanically measured side becomes outer and comes into contact with the orienting members after mere transverse displacement. After the measurement alone, it can be poured on either side and the transverse 5 can be moved to the side of the two orienting devices 15 and 16, the orienting members of which point against the measured surface, so that one measuring station can serve two jigsaw lines.

In the device solution 10 implementing the method according to the invention, the distance between the sawing machine I and the sawing machine II can be made very short, which is advantageous from the point of view of construction costs.

The invention is not limited to the embodiment exemplified above, but can be implemented in several modifications within the scope of the inventive idea set forth in the following claims.

Claims (3)

71258 A method for orienting a blank (1) to be fed to a machine tool (13), the feeder being fed in its longitudinal direction 5 past a measuring station (7), after which the direction is corrected transversely by orienting means (10) acting transversely to its unmachined surface (5, 6); that, in addition to the optical measurement, which determines the shape of the plain (1) and the contour of the flat surface (3, 10 4), the position of the possible points of action of the orienting members (10) and their immediate surroundings is measured by means of a mechanical member (14). Method according to claim 1, characterized in that the mere (1) is conveyed in a vertical position through a measuring station (7), where the position of possible points of action on its upper surface (5) is measured by means of a mechanical member (14). against the orienting members (10). 20 Method according to Claim 1 or 2, characterized in that the contact of the mechanical measuring element (14) and the orienting element (10) with the surface (5) of the mere (1) is similar.