FI56941B - FLISHUGGNINGS- OCH SAOGMASKIN - Google Patents

Description

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J&A ^ * 11) UTLÄGGNI NGSSKRIFT 5694 1 C (45) Patent granted IC 35 1930 Patent meddelat T (51) Kv.lk. * / LncCI. · B 27 I * 11/02 FINLAND — FINLAND (21) f · * · "** '» »* ·» "' · * -570 / 70 (22) Hakamlspilvi - Ansöknlngtdif 03 · 03 · 70 (23) Alkuplivt — Glhighatadaf 03 * 03-70 (41) Tullut Julkl» ksl - Blivlt offentllj 06.09 - 70 pmnttl. J. rddMriiMiiion «» * ». 11! ^. ^ -„ r »t« nt- och registerstyr «l *« n 'Antttiuui utlagd och utl. * Krtft * n publkurad 31 - 01. Ö0 (32) (33) (31) Catches «Begird prloritat 03-03-69

Sweden-Sweden (SE) 303 ^ / 69 (71) Kockum Söderhann AB, Söderhamn, Sweden-Sweden (SE) (72) Philip Nilsson, Söderhamn, Sweden-Sweden (SE) (7 * 0 Berggren Oy Ah (5 * 0 The present invention relates to a chipper and sawing machine comprising a frame, rotatably mounted means for cutting log ribs into pulp chips by making the two opposite sides of the logs planar and parallel to each other, planar tapering and sawing , and actuators for cutting and sawing members, wherein the cutting members are truncated cones with narrower ends facing each other and adapted to rotate about an axis of rotation perpendicular to the direction of movement of the logs fed between the longitudinally truncated cones, and both said cones are equipped with numerous blades located in ak in the social and radial directions spaced apart and each having a first steel edge located so as to act in the first plane containing the log fibers and a second steel edge located at a second angle to the first plane to cut the fibers in their transverse direction; both truncated cones have guide surfaces located after said steel edges and so as to guide the logs as they are transported past said cones.

56941

Traditionally, in connection with sawing, the logs are formed flat on at least two opposite sides before sawing, for example by cutting certain side parts of the logs into chips. The conventional procedure has been that the logs have first been passed through a special chopping machine called a carrying or cutting machine and then transported to a suitable sawing machine.

Although the surfaces of the logs are flat immediately after the leveling step, said step simultaneously changes the internal stresses in the struts to such an extent that deflections and distortions occur in the leveled logs after only a few seconds.

This phenomenon is especially noticeable in winter, when logs can be frozen. If such deflections or distortions occur on the way from the loading or cutting machine to the sawing machine, at least the outermost sawn boards do not have the desired exact dimensions, and this is a serious drawback.

An improvement to the practice described above has been proposed in U.S. Patent No. 3,886,541. It has cutting members and sawing members arranged in succession so that the cutting members center the log when the log enters the sawing members. The purpose is precisely to prevent the rear end of the log from moving sideways before sawing begins. After all, such a shift would result in the center line of the log deviating from the center line of the saw line. However, effective control of the log during sawing is not provided by this known structure.

It is also already known to prevent the log from rotating in the cone side chippers by guiding the log from its already cut sides.

It is therefore an object of the present invention to provide an improvement in the quality of sawn timber in a combined chipper and sawing machine by providing appropriate log control also during sawing. To achieve this, the chipper and sawing machine according to the invention is characterized in that the sawing members and the cutting members are mounted in one and the same frame, the sawing members being located immediately in connection with the cutting members.

Thus, the invention ensures that the sawing of the outermost boards always takes place in planes parallel to the leveled surfaces of the log and thus the thicknesses of the boards are the same everywhere. Of course, it can also happen that the boards bend or curve after sawing, but this fact is of little importance, it is essential that the boards have the correct thickness. Further bent or curved boards usually straighten when placed on pegs or the like.

3,56941

At the same time, another advantage is achieved that the machine can be easily adjusted, because on both sides the cutting members and sawing members can be adjusted together.

The invention will be described in more detail below with reference to the accompanying figure, which shows from above and very schematically an application selected, for example, from a chipper and sawing machine according to the invention.

The figure shows a log 10 passing a pair of chipper parts which are truncated cone-shaped plates 11, 12. The log is supported by a conveyor 13> which is shown only schematically. The plates 11, 12 form two opposing flat surfaces on the log by cutting into chips those side parts of the log which would otherwise form discardable edge parts in the normal sawing operation.

In the direction of travel of the log very close to the chipper plates there is a pair of sawing parts 14, 15 for sawing the board 16, 17 on each side of the just leveled log, and in the illustrated application sawing the saw sections 14, 15 very close to sawing a couple more saws 18, 19. with the center piece 22 remaining sawn in the conventional manner. The figure further shows a pair of additional guides 23, 24 near the plates 11, 12.

The conveyor 13 is preferably quite narrow so that it can extend between and past the sawing parts 14, 15, 18, 19 and, if necessary, its effect can be strengthened by a suitable transport and holding device located above.

The chipper parts 11, 12 can be of any suitable quality, the only essential point in this connection being that they must form two opposite parallel surfaces on the logs. However, it appears that particularly favorable results can be obtained with the use of chipper plates of the type described in Swedish Patent Application No. 17591/68. However, it must be emphasized in this case - since we always deal with logs that have been specially selected for sawing - that it is never necessary to move the boards completely together to cut the whole log into chips. Therefore, there is no need to place the chipper plates 11, 12 in any predetermined rotational positions relative to each other and it is hardly even necessary to maintain full synchronism between the plates, although it is in the nature of the matter that at least substantially complete synchronism be preferred. It should be noted that for the reasons mentioned above, the actuators of the switch plates 11, 12 can be made quite simple.

It has already been mentioned that the chipper plates 11, 12 never have to be placed completely together, but on the other hand it is of course wise to place them so that they are at least to some extent adjustable towards and away from each other. It is also suitable to arrange the sawing parts 14, 15 and 18, 19 to be adjustable towards and away from each other, respectively.

In the example described, the sawing parts are assumed to be a band saw, but the invention is in no way limited to these and it is also possible to use other sawing parts, such as a circular saw.

With regard to the guides 23, 2h, it must be emphasized that in a few cases such good control can be obtained by means of the narrow ends of the switch plates 11, 12 that the guides 23, 24 can be omitted altogether.

Numerous modifications and variations of detail are possible within the scope of the invention.

Claims (1)

A chipping and sawing machine comprising a frame, rotatably mounted means (11, 12) for cutting logs into mass chips by making the two opposite sides of the logs planar and parallel to each other, planar narrowing and sawing members (14, 15, 18, 19) at least for sawing one board on each side of a planar conveyor, and actuators for cutting and sawing members, the cutting members (11, 12) being truncated cones with narrower ends facing each other and adapted to rotate about an axis of rotation perpendicular to the direction of movement of the logs between the logs fed in the longitudinally truncated cones, both of which are provided with a plurality of blades spaced axially and radially apart and each having a first blade edge so as to act in a first plane which the fibers of the log are included, and a second steel edge located at a second angle to the first plane to cut the fibers in their transverse direction, both truncated cones having guide surfaces located after said steel edges and so as to guide the logs as they are transported; past said cones, characterized in that the saw members (1 * 4, 15, 18, 19) and the cutting members (11, 12) are mounted in one and the same frame with the saw members (14, 15, 18, 19) immediately located on the cutting members (11, 12) context. Plishuggnings- och sägningsmaskin, innefattande ett stativ, i detta roterbart lagrade organ (11, 12) förgug av stockarnas sidopartier account masseflis , 19) for the supply of ätminstone en bräda vid vardera sidan av den planreducerade stocken, samt drivanordning för huggnings- resp. sägningsorgan, varvid huggningsorganen (11, 12) är stympade koner, vars mindre ändor är belägna mittemot varandra och vilka är anordnade att drivas runt kring en rotationsaxel, som