SE451246B - CUTTING CUT FOR CUTTING THE SIDE WOODS FROM TREES - Google Patents

Description

10 15 20 25 30 35 hrs) 451 246 insert splitting wedges, which are arranged on the movable the cutting device, and to hold the side the boards, requires a considerable constructive effort. The friction occurring at the splitting wedges prevents rapid movement of the cutting device relative to the tree trunk, by partly the feeding speed of the tree trunk becomes limited and partly sufficient time is not available, to it must be possible to perform several cuts. About the sideboard as waste or sawdust cut part is relatively long and should therefore be divided once or several times, for example to subsequently separate waste and utility boards, however, several sections would be desirable.

To overcome this difficulty has been suggested (German patent application P 30 20 321.5), to perform the cutting sections before the saw cuts, which separate the side boards, i.e. while the side boards have not yet been separated from the main product. Where- is a special control or clamping of the side the boards not required. Determined depth of cut can be contained very precisely, whereby damage to the main the outside of the product through the cut sections are excluded.

The device proposed for carrying out this method of the initially stated kind exhibits on both sides of the feeding mechanism for the tree trunks arranged units, which are vertically movably guided on uprights.

These uprights are from case to case mounted on an i sledge transportable mobile tree trunks.

For the movement of the chainsaw units during the cutting section is required two drive devices, which simultaneously move the cutting saw two perpendicular guides.

Since the effort required for this purpose for governance construction is considerable, a simple in this respect. The operating conditions of the miter saw units races shall, in terms of speed, be adapted to the arranged working speeds of the processing devices.

Therefore, relatively high speeds are required for racing 10 15 20 25 30 35 5 4É1 246 the movement of the units, whereby at the often required high deceleration and acceleration forces, which are the greater, the greater the masses are to be retarded and accelerated, respectively. For this reason too, efforts are being made to maintain as little as possible.

The object of the invention is therefore that in a chainsaw of initially stated stroke reduce it for the course of movement required control and design effort.

This task is solved according to the invention by the main the characteristic features of the characteristic part of the claim.

As the miter saw unit moves along the inclined guide, an operating component is obtained in the transport of direction and a vertical component of movement. The one in the tree the transport direction of the trunks directed the movement component moves the jigsaw units synchronously with the tree trunk, i.e. there is no one in the transport direction of the tree trunk relative movement between the chainsaw unit and the tree trunk. The the vertical movement component forms the feed movement at the cut. Both operating components are obtained by movement in a single direction, namely along the inclined the steering.

In order to then perform an arbitrary cut, the unit is to be returned to its original position, moved the cutting saw unit across the transport direction of the tree trunks, for that the chainsaw unit during the return stroke along the inclined the steering must be out of engagement with the sideboard.

The largest displacements occurring during this course of movement routes, which also show the greatest deceleration and the accelerations at the turning points, are performed here only by the relatively light chainsaw unit, which through the occurring deceleration and acceleration forces one are small. They in comparison thus significantly larger and 10 15 20 25 30 35 451 246 4 heavier parts, namely the control for the chainsaw unit moved in contrast to the above-mentioned, already beaten device only with a very short distance, which is only slightly longer than the thickness of the side board.

Therefore, only very small accelerations occur in this case. and deceleration forces.

Because the movement of the jigsaw units only takes place in two directions, namely along the inclined guides and across the transport direction, is the constructive effort for guideways or the like relatively small.

The embodiment according to claim 2 is constructively simple and also has the advantage of low space requirements, so that can also be subsequently built into existing facilities. nings.

The embodiment according to claim 3 is particularly advantageous.

Especially for operation of the height movement of the circular saw unit is the advantage of light weight at high performance of such drive devices are particularly important because they are mobile the masses thereby become small.

With reference to the accompanying drawing is described below as example a suitable embodiment of the cap saw according to the finding. In the drawing, figure 1 in side view shows one embodiment of the jigsaw for sideboards, and figure 2 a view of the chainsaw in the direction of arrow II in Fig. 1.

The cap saws shown in the drawing serve to on tree trunks 1, which are already flattened on four sides, apply vertical sections 1 'through those still with the main the product connected the side boards 1 ". As shown in the section according to Figure 2, the four edges of the tree trunk are preferably already cut out at right angles, to edge the longitudinal edges on the side boards 1 "to be separated. Tree trunks 1 transported on a feeding mechanism, of which only one support rail 2 is indicated in figure 2, and is supplied to a 10 15 20 25 30 35 s j A 45.1 '246 device for chip-splitting division of tree trunks processed wood products on all sides, such as boards, plan- cows, curbs and the like. For subsequent separation of the side boards 1 "are frame saws, band saws or - such as in Figure 1 - superimposed_circular saws 14 are used reversible.

Especially when using double circular saws 14 is one very high working speed and thus also a high transport gate speed for tree trunks 1 possible. To apply cap cuts 1! therefore stands from case to case only one very short periods of time available, especially if the incisions must be made in quick succession.

Figures 1 and 2 show only the one on one side of the tree the chainsaw arranged on the stem 1. However, it is stated that a correspondingly designed chainsaw is also provided on the opposite side.

The chainsaw has a chainsaw unit 3, which comprises a saw motor, which drives a circular saw 4 with horizontal rotation tionsaxel. The chainsaw unit 3 is on two parallel, towards the tree the direction of transport of the trunks 1 (arrow 5 in Figure 1) round guides 6 movable between an upper and a lower location. The splitting device for this forms an oil pressure operated piston-cylinder device 7, the piston rod 8 of which engages on the the saw unit 3.

The two round guides 6 are fixed in a frame 9, which is also carries the piston-cylinder device 7. The frame 9 is horizontal slidably mounted on two circular guides 10, which extend across the transport direction of the tree trunks 1. The operation of the frame 9 horizontal movement takes place by means of a pressure medium operated piston-cylinder device 11, which is mounted on a machine stand 12 and whose piston rod 13 engages the frame 9.

The course of movement is indicated in Figure 2. From a the lines shown in Figure 2, the upper starting position is moved 10 15 20 -25 451 246 6 the cutting saw unit 3 by means of the cylinder 7 rapidly downwards along the inclined guides 6. The circular saw 4 then performs the cutting 1 '. The horizontal movement component of the jigsaw unit 3 corresponds against the transport movement of the tree trunk. 1 After the cutting saw unit 3 has made the cutting cut and the circular saw 4 disengaged with the side board 1 "(in figure 2 indicated by dotted lines), the frame 9 is retracted by the piston the cylinder device 11 to the dotted line in Figure 2 hinted mode. The path thus traveled corresponds to at least the thickness of the side board 1 ". the jigsaw unit 3 is moved upwards again. Because the circular saw 4 thereby being out of engagement with the side board 1 ", interferes not the continuously further transport of the tree trunk 1 the reciprocating movement of the miter saw unit 3. In the jigsaw unit 3 upper position, the frame 9 is again pushed forward by the piston-cylinder device. 11. The cutting saw unit 3 can start again from there next section.

In contrast to the embodiment shown, in which the round guides 6 are inclined towards the transport direction of the tree trunks 1. 5 and the cutting takes place during the movement of the cutting saw unit 3 downwards, is also a device selectable, at which the guides 6 is inclined in the transport direction, whereby the cutting takes place while the jigsaw unit 3 moves upwards. 'u

Claims (3)

10 15 20 1 a 451 saw Patentkrav 1- Cutting saw for cutting side boards (1 ") on continuously transported tree trunks (1) before separation from the main product, with a feeding mechanism for the tree trunks (1) and at least one arranged on the side thereof, at the cutting section with the transport speed of the tree trunks (1) jigsaw unit (3), which is movable in height along a guide (6), characterized in that the guide (6) for each jigsaw unit (3) is inclined in or towards the transport direction (5) of the tree trunks (1) and is movable only across the transport direction (5). Cutting saw according to claim 1, characterized in that the guide for each cutting saw unit (3) consists of two parallel circular guides (6), which are attached to a frame (9), which is slidably mounted on two horizontal ones, on the stand. fixed round guides (10). Cutting saw according to Claim 1 or 2, characterized in that the vertical movement of each cutting saw unit (3) and the transverse movement from case to case are driven by a pressure-medium-operated, preferably oil-pressure-operated, carbon-cylinder device (7 resp. 11).