FI99098B - Arrangement for the conveying of heartwood and separation of side boards - Google Patents

Abstract

Arrangement for the conveying of heartwood 2 and separation of side boards 3 in a sawmill for side boards, the arrangement comprising a conveyor provided with rakes 7 for conveying the heartwood. The rakes 7 are provided with an upper edge, which constitutes the conveying base for the heartwood. The end of the rakes 7 corresponding to the edge of the heartwood 2 is chamfered downwards in order to produce separation of the side boards 3 from the heart wood. The width of the conveying base can be adjusted so that it corresponds at least substantially to width of the heartwood 2 by adjusting the position or length of the rakes 7 in two directions of the conveyor. A wearing piece 21 of essentially harder material than the material of the rest of the rake has been fixed to the upper edge 12, the width of which piece is largely equal to the width of the upper edge 12, and which forms the conveying base of the heartwood. <IMAGE>

Description

99098

EQUIPMENT FOR THE CARRIAGE OF HEART GOODS AND THE SEPARATION OF SIDE BOARDS

The present invention relates to an apparatus according to the preamble 5 of claim 1 for transporting core goods and separating side boards in a sawmill.

After sawing the side boards, the core material is moved by chain conveyors. To separate the sideboards from the core goods 10, elongate, straight separation plates (i.e., separation knives) are now used, which are placed on each side of the core goods so that the core goods pass in question. between the baffles and the sideboards on the outside of the baffles.

15 Logs are often not straight but curved. When it is desired to maximize the yield of the core product, the core product is sawn in an arc. Especially in arc sawing, the core goods are easily stuck in the current equipment due to their curved shape. between the straight separating plates 20, causing the conveyor to stop working and possibly to break the separating equipment. The side boards can also be caught between the knife and the heart item. Another disadvantage of the current separation equipment is that the adjusting separator plates for different cardiac widths. 25 for it is very inconvenient. This is particularly troublesome in the variable-set case, where the width of the heart goods changes even at successive widths of the heart goods.

The object of the present invention is to obviate the drawbacks of the prior art 30 and to provide an apparatus capable of effortlessly transporting curved and variable-width core goods and separating sideboards from the core goods without interruptions in use and the additional costs involved.

.: 35: The characteristic features of the apparatus according to the invention are set out in the appended claims.

With the solution according to the invention, it is possible to decisively improve the transport of curved core goods in particular and the separation of the side boards from them. Once the edges of the transport base have been chamfered in accordance with the invention in order to separate the side boards, there is no longer a risk of the core material getting stuck. In addition, thanks to the width adjustment of the transport base, it is easy to take into account the variation of the width of the core goods, thanks to the one-to-10 times width adjustment of the width of the base. The width-like elasticity of the upper roller results in an even more gentle handling of the core material. In addition, the sloping edge of the transport platform makes it easier to separate the boards in the case of icy timber. The solution according to the invention achieves efficient and economical operation, in particular because the apparatus operates continuously, since no lever arm or the like needs to be moved at a single piece of core goods.

In the following, the invention will be described in more detail by means of an exemplary example with reference to the accompanying drawings, in which

Figure 1 shows an apparatus according to the invention.

: Figure 2 shows the conveyor in cross section.

25 r: Figure 3 shows a cross section of the cola.

9 •

Figure 1 shows how only the circular saw 1 has been sawn into the core goods 2 and the side boards 3, which after sawing are separated from the core goods according to the invention.

'. After sawing, the core material 2 is supported on the side of the support- »·« m. on rollers 4 and transported on a conveyor.

«· ·’ ·· The conveyor has frame beams 5 and 6 with both top and bottom% · 99098 3. Transverse recesses 7 run along the lower frame beams 6, on top of which the core goods 2 are transported. The core material 2 is supported from above by overhead support rollers 8 attached to the upper beam 5 by fork-5 arms 9. The side boards 3 are transported away by a roller conveyor 10.

As shown above, the conveyor has transverse recesses 7 (Fig. 2), which are metal tubes with a rectangular cross-section of 10. The ends 11 of the pockets 7 are chamfered downwards, and the core goods 2 pass over the flat horizontal upper edge 12 of the pockets 7 on a welded or otherwise attached upper edge-wide wear piece 21, which thus forms the base for transporting the core goods. The wear piece 21 15 is a strip a few mm high, which is considerably more wear-resistant than other parts of the cola, such as wear steel or spring steel. In this way, wear on the horizontal part of the cavity 7 can be prevented. As a result of the wear, the width of the horizontal part of the cavity could increase, which worsens the separation of the board, since some of the side boards can then remain on the conveyor.

: The conveyor has a chain drive with two adjacent chains 13, 13 ':. Due to the variation in the width of the core article 2: 25, the width of the transport base formed by the collar 7 can be: adjusted. The edge of the core article 2 thus always runs at the edge of the straight part: 12, whereby the side boards 3 come into the oblique part 11 and then fall onto the side guide roller conveyor 10.

· '. 30. The platform width adjustment is performed as follows. Each * ·. the chain always carries every other cavity 7, 7 '(7' is shown in dashed lines). The edge between the straight part 12 of the second strip and the oblique '·· part 11 is adjusted to run flush with the right edge of the heart article • · 4 99098 and every other left. The adjustment takes place by means of a reaction rod 14, 14 'fastened to each chain drive via the fastening part 15, 15', which can be moved in the transverse direction of the conveyor. At the same time, the position of the cola in the transverse direction of the conveyor and at the same time the width of the conveyor base can be adjusted to correspond to the width of the core goods. The reaction rods 14, 14 'are moved simultaneously, for example by means of a common drive shaft, so that the base widens or narrows at both edges to correspond to the desired width 10. The length of the flat edge of the cola must then be smaller than the width of the core article 2, as shown in Figure 2.

For suspension above the core article 2, a support roller 8 (top sectioned in the figure) 15 is arranged on the fork 9, which rotates on a shaft 16. A sleeve 17 is placed at both ends of the shaft and a compression spring 18 is placed on it, so that the support roller can spring laterally. The support roll 8 is in the shape of a truncated cone in the cross-section of the roll surface, whereby pieces of core goods of different widths can be transported 20 supported by the support roll in the event of contact points. depending on the width of the heart piece at a different point in the cone.

· Due to the lateral elasticity, the support roller also supports the core product 2 sawn into a curved shape. The support roller 20 can also be without a conical shape.

f: 25

The front edge 19 of the cavity is also chamfered downwards to widen • · Γ: according to Fig. 3, whereby the rear edge of the core piece does not get stuck in front of the cavity and interrupt the operation of the conveyor.

• * • · • * ·: *. It will be apparent to one skilled in the art that various aspects of the invention will not occur. embodiments are not limited to the example given above, but may vary within the scope of the claims set forth below.

* • · »· · •%% \:

Claims (6)

An apparatus for conveying core material (2) and separating side boards (3) in a side board sawmill, the apparatus comprising a conveyor provided with a Koli (7,7 ') for conveying heart material, the body (7,7') having a substantially horizontal upper edge (12) , characterized in that the end (11) corresponding to the edge 10 of the core (2) of the core (2) is chamfered downwards to separate the sideboards (3) from the core, so that the width of the conveyor base can be adjusted at least substantially by adjusting the width of the core (2). 7,7 ·) position or length in the transverse direction of the conveyor, and that a wear piece (21) at most of the width of the upper edge, which is substantially more wear-resistant than other material of the coulter, is attached to the upper edge (12), forming a core transport base. Apparatus according to claim 1, characterized in that the transport pallet consists of successive cavities, of which part (7) forms one edge of the transport pallet and part: * · (7 ') the other edge, and that the width of the transport pallet is adjusted at each edge. with adjusting members (14,14 ') connected to the coli, adjusting their position in the transverse direction of the conveyor. • · 30 · '. Apparatus according to claim 2, characterized in that the cavities (7, 7 ') are shorter than the width of the core article at their flat upper edge (12). «♦ m · • · ·» * · • ·% · ·. *: e 6 99098 Apparatus according to claim 1, characterized in that the apparatus comprises overhead teak rollers (8, 19) arranged in the suspension part (9), of which at least a part of the support rollers has a substantially conical cross-section 5 for different widths of the log or log. Apparatus according to Claim 4, characterized in that the support rollers are arranged resiliently in the lateral direction on the suspension part (9). 10 5,99098 Apparatus according to Claim 1, characterized in that the front edge 19 of the sleeves (7, 7 ') is chamfered downwards. m • * • · • w • · • * • * · 9 99 · • · * m · • · '· · • · ·· 7 99098