FI59546B - ANORDNING FOER STYRNING AV BRAEDER TILL ETT KANTVERK - Google Patents

Description

59546

Device for guiding boards to a sawmill Anordning för styrning av bräder account ett kantverk

The present invention relates to a device for guiding a board between the edges of a reciprocating saw with a movable and a fixed saw. In conventional manual edging, the two edgers feed the boards 5 to the edging saw by means of a shading line device, one placing the top end and the other the bottom end most preferably relative to the sawing lines, after which the board is pushed between the edging rolls of the edging saw. Operation is quite slow or inaccurate.

The normal mechanical centering of the top end prevents the edging-10 he structure; the second blade is fixed, so that as the setting changes, the position of the centerline also changes.

The invention relates to a device by means of which the top end of a board can be centered on the center line of an edging saw setting and, in addition, the split-side boards can be guided very precisely through sa-1 5 he.

The control device according to the invention is characterized in that it comprises two guide members on the side surfaces of the board, which, while maintaining their mutual position, are adapted to move laterally according to the position of the blades so that their center line displacement is half the movement of the displaceable blade.

The control of the distribution stage boards is based on the control by means of the outlines of the boards. Due to the sawing technique, the split side boards are almost symmetrical in their open surface with respect to the center line 25 and the extreme edges almost always reach a mere height. By aligning the two guide planes parallel to the saw line so that there is only a slightly greater height between the knives (= board contour width) and that the knives are symmetrical to the saw line-30, and pushing the top of the board into the and quite ideal board position. By engaging the guide knives as described above according to the position of the edging saw, the guide remains symmetrical with respect to the sawing lines regardless of the position. For special cases, a manually controlled working cylinder can be added to the mechanism, which spreads the guide knives if the edger wants to edge asymmetrically.

The movement of the control device can be connected to the moving blade 40 of the saw, for example mechanically or hydraulically.

The invention will now be described in more detail with reference to the accompanying drawings, in which Figures 1 and 2 show the principle of operation of a device according to the invention, Figure 3 shows a perspective view of an embodiment of the device, and Figure 4 shows another embodiment.

In Figs. is shown in Fig. 2. As the position of the saw changes, with the movable blade 1 moving to position 1 ', the control device 5 moves half the way to position 5', halving the part to be removed on either side of the position. The board 7 is guided between the knives 8 of the control device to the saw blades 1 and 2.

The reduction phase side slides cannot be controlled from their extreme edges, 60 but the control device centers the top end during the orientation of the board and removes the board at the beginning of the edging. The device refines the edging and makes the use of an auxiliary edging unnecessary.

59546 3

The edging of the reduction stage sideboards is performed with the device shown in Fig. 3 as follows. The edger pushes the 65 head of the board 7 into the guide device 5 after selecting a suitable setting. The body 9 of the control device is connected to the rod 3 so as to follow the movement of the insertable blade 1 as shown in Figures 1 and 2. The photocell 10 provides an impulse to the adjustable time relay 11, which controls the compressed air valve 12, whereby the blade 13 of the cylinder-70 centers the front end of the board by means of control means 14.

The control members are connected to each other so that they move symmetrically with respect to each other. An adjustable time relay controls the valve 12 for a certain delay (e.g. 1 s), during which the edger places the board at the desired position.

75 The center opens and the board is fed into the edging saw.

The time relay 11 is built to start only when the front end of the board passes the photocell 10.

If the edger wants to change the setting or otherwise refocus the board, he pulls the board back until the front end of the board 80 leaves the field of view of the photocell 10.

The centering time of the time relay 11 can be adjusted according to the edging and capacity requirements.

If the trimmer has to bend both the dividing and reduction stage boards, a manual parallel-85 control is connected to the valve 12, by means of which the trimmer keeps the centering locked during the trimming of the division stage boards.

The device can also be electrically operated and a feeder can be added to it, so that the edger does not have to push the board to the saw when the center is opened. 1

The embodiment shown in Figure 4 is intended for distribution stage boards with a constant width. The knives 8 of the control device are fixedly mounted on the movable frame 9. The knives cut through the board to the saw.

Claims (3)

4,59546 A device for guiding a board between the blades of a press saw with a movable and a fixed blade, characterized in that it comprises two guide members (8, 14) on the side surfaces of the board (7), which, while maintaining their mutual position, are thus adapted to (1, 2) according to the setting to move laterally so that their center line displacement is half the movement of the displaceable blade (1). Device according to Claim 1, characterized in that the board guide members (14) are displaceable 10 symmetrically relative to one another. Device according to Claim 1, characterized in that the distance between the guide surfaces of the board guide members (14) can be standardized.