Timber handling plant comprising a timber sorting station

Abstract

The present invention relates to a timber handling plant (1) comprising a timber sorting station (2) and a method for controlling such a timber handling plant (1), wherein the timber sorting station (2) has an infeed end (3) configured for receiving unsorted timber bodies, and comprises an infeed conveyer (4) extending from the infeed end (3), and a primary sorting apparatus (5). The primary sorting apparatus (5) comprises a first classification unit (6) for classifying each timber body into predetermined classes, and a plurality of primary collecting compartments (7) corresponding to said predetermined classes and each configured to receive all timber bodies of one of the predetermined classes, wherein the primary collecting compartments (7) are located downstream said infeed conveyer (4). The timber sorting station (2) further comprises a secondary sorting apparatus (8) located downstream the primary sorting apparatus (5) and comprising a second classification unit (9) for batchwise classification of each timber body of one of the predetermined classes at a time into temporary sub-classes, and a plurality of secondary collecting compartments (10) corresponding to said temporary sub-classes and each configured to receive all timber bodies of one of the temporary sub-classes.

Description

[0001] TIMBER HANDLING PLANT COMPRISING A TIMBER SORTING STATION

[0002] Technical field of the Invention

[0003] The present invention relates in general to a timber handling plant, for handling unsorted round timber bodies, also known as logs.

[0004] The present invention relates in particular to a timber handling plant comprising a timber sorting station having an infeed end configured for receiving unsorted timber bodies, wherein the timber sorting station comprises an infeed conveyer for unsorted timber bodies, wherein the infeed conveyer extends from the infeed end of the timber sorting station, and a primary sorting apparatus. The primary sorting apparatus comprises a first classification unit for classifying each timber body into predetermined classes and located adjacent said infeed conveyer, and a plurality of primary collecting compartments corresponding to said predetermined classes and each configured to receive all timber bodies of one of the predetermined classes, wherein the primary collecting compartments are located downstream said infeed conveyer. The present invention also relates to a method for controlling such a timber handling plant.

[0005] Background of the Invention

[0006] All modern sawmill industries utilize saw lines, which often includes a large number of stations, the majority of which have a high level of automatization in order to obtain an optimal output, i.e. boards / timber pieces, from the raw material in the shape of round timber bod- ies / logs. In order to maximize the economical result for the sawmill owner, the degree of utilization and efficiency of the sawmill is essential.

[0007] In addition, it is a primary aim that the timber pieces sawn from a larger timber body present intended dimensions with minimum variations in each dimension category, as well as along each timber piece. It is desirable to reduce the variations of dimension to a minimum, since such timber is assigned a high-quality category, thereby resulting in a maximal financial yield. The demands from the sawmill owner that every station along the sawing line shall generate products having great dimensional accuracy are therefore exceptionally strict. A most frequently occurring demand is that the variation within a dimension category, regarding the thickness of the timber pieces, shall not be more than 0,5 millimeter.

[0008] Thereto, it is also a primary aim to obtain the most output as possible from each timber body, i.e. having an optimal dividing pattern and minimum waste for each timber body.

[0009] It is known that one process activity is essential and has direct effect on the ability to meet the primary aims, and this process activity is the sorting of the unsorted timber bodies into classes, wherein each class has as small deviations as possible and high uniformity. In theory, when each individual timber body / log constitute its own class, the optimal total output is achieved. However, feeding totally unsorted timber bodies from the loading station to the sawmill entails that the different sub-stations of the sawmill, e.g. canting, reducing, sawing, has to be adjusted between each timber body which will decrease the feed rate of the timber bodies and / or increase the mutual distance between two subsequent timber bodies. This will result in poor energy efficiency per log, low production rate, and increased wear on the production equipment.

[0010] Thus, the best solution is found somewhere in-between utilizing one class, wherein all timber pieces are divided according to one and the same pattern / strategy, and utilizing indefinite number of classes, wherein each timber piece is divided according to an individually optimal pattern / strategy. However, when the optimal number of classes is found, the cost as well as footprint of such an optimal timber sorting station are almost always too extensive and the number of classes is therefore reduced based on overall financial considerations despite less total product / financial output / yield. Thus, the optimal number of classes is for instance between 20-30 from a total product output / yield point of view, but the realistic number of classes is for instance 10-12 from a financial output / yield point of view.

[0011] There is still a need in the art for an efficient and financially attractive timber handling plant providing optimal total output / yield. of the Invention

[0012] The present invention aims at obviating the aforementioned and other disadvantages and failings of previously known timber handling plants and methods for controlling such timber handling plants, and at providing an improved timber handling plant and method.

[0013] A primary object of the present invention is to provide an improved method and plant of the initially defined type, wherein the timber sorting station is evolved to be able to provide the optimal total product output / yield without violating the financial prerequisites. of the Invention

[0014] According to the invention at least the primary object is attained by means of the initially defined timber handling plant and method having the features defined in the independent claims. Preferred embodiments of the present invention are further defined in the dependent claims.

[0015] According to the present invention, there is provided a timber handling plant of the initially defined type, which is characterized in that the timber sorting station further comprises a secondary sorting apparatus located downstream the primary sorting apparatus and comprising a second classification unit for batchwise classification of each timber body of one of the predetermined classes at a time into temporary sub-classes, and a plurality of secondary collecting compartments corresponding to said temporary sub-classes and each configured to receive all timber bodies of one of the temporary sub-classes.

[0016] According to the present invention, there is provided a method of the initially defined type, which is characterized by the steps of:

[0017] - feeding unsorted timber bodies from the infeed end of the timber sorting station to the plurality of primary collecting compartments of the primary sorting apparatus,

[0018] - classifying each timber body by the first classification unit into predetermined classes,

[0019] - sorting the classified timber bodies into the corresponding primary collecting compartments,

[0020] - batchwise feeding the timber bodies of one of the predetermined classes at a time to the plurality of secondary collecting compartments of the secondary sorting station,

[0021] - classifying each timber body of one of the predetermined classes at a time by the second classification unit into temporary sub-classes, and

[0022] - sorting the classified timber bodies into the corresponding secondary collecting compartments.

[0023] Thus, the present invention is based on the insight of arranging / dividing the sorting of the timber bodies into two or more subsequent steps, instead of using one conventional sorting step. Thus, starting from a conventional sorting station having at total of ten parallel collecting compartments arranged in a single sorting apparatus. Each dimensional class of the ten classes will then for instance comprise a diameter variation within a range of 30-40 millimetres. By arranging said ten collecting compartments in two subsequent sorting apparatuses, i.e. seven in the primary sorting apparatus and three in the secondary sorting apparatus, wherein each of the three collecting compartments of the secondary sorting apparatus will be used in combination with each collecting compartment of the primary sorting apparatus, one will obtain twenty-one classes each having a diameter variation about 10-15 millimetres. By arranging said ten collecting compartments in three subsequent sorting apparatuses, i.e. five in the primary sorting apparatus, three in the secondary sorting apparatus, and two in the tertiary sorting apparatus, wherein each of the three collecting compartments of the secondary sorting apparatus will be used in combination with each collecting compartment of the primary sorting apparatus and wherein each of the two collecting compartments of the tertiary sorting apparatus will be used in combination with each collecting compartment of the secondary sorting apparatus, one will obtain thirty classes each having a diameter variation about 5-10 millimetres.

[0024] The final sub-classes may be transported to intermediate storage or directly to a sawmill for dividing the sorted timber bodies / logs into smaller timber pieces. Thanks to the present invention the division of the timber pieces may be made in a financially attractive fashion and in an efficient way without any need for readjusting the sawmill equipment within one batch / sub- class of timber and thereby less or no distance between subsequent timber bodies. According to various embodiments of the present invention, the timber sorting station further comprises an intermediate conveyer of the timber sorting station, wherein said intermediate conveyer extends from the primary collecting compartments to the secondary collecting compartments and is configured for batchwise conveying the timber bodies of one of the predetermined classes at a time, wherein the second classification unit is located adjacent said intermediate conveyer. Thereby automized feeding / transportation between the primary sorting apparatus and the secondary sorting apparatus is provided.

[0025] According to various embodiments of the present invention, the timber sorting station further comprises an outfeed conveyer of the timber sorting station, wherein said outfeed conveyer extends from the secondary collecting compartments to the outfeed end of the timber sorting station and is configured for batchwise conveying the timber bodies of one of the temporary sub-classes at a time. Thereby automized feeding / transportation from the collecting compartments of the secondary sorting apparatus to a subsequent station is provided.

[0026] Brief iption of the

[0027] A more complete understanding of the abovementioned and other features and advantages of the present invention will be apparent from the following detailed description of preferred embodiments in conjunction with the appended drawings, wherein:

[0028] Fig. 1 is a schematic overview of a preferred embodiment of a timber handling plant.

[0029] Detailed description of preferred embodiments of the Invention

[0030] With reference to figure 1, the present invention relates in general to a timber handling plant, generally designated 1, and a method for controlling such a timber handling plant 1, primarily intended for handling unsorted round timber bodies, also known as logs.

[0031] An initial stack of timber of unsorted round timber bodies may have a great dimensional variety regarding diameter and / or length, and may comprise timber from different sorts / spe- cies, and may have a great variety regarding shape and quality. Thus, in addition to different dimensions, the timber bodies may be more or less curved and / or more or less tapered, the timber bodies may have many knots or be free from knots, etc. Thus, an initial stack of timber can be classified / sorted according to many different aspects, and the present invention is not limited to one specific aspect. Classification based on diameter is most frequently used. There are different conventional ways to determine diameter, for instance top-end diameter of a timber body, average diameter of a timber body, middle-point diameter of a timber body, etc. Presence of knots and other deviations can be found using conventional scanner equipment. Thus, classification is performed according to conventional ways using conventional equipment, and the ranges are set by the operator.

[0032] The essence of the present invention is a timber sorting station, generally designated 2, that is part of the timber handling plant 1. The timber sorting station 2 has an infeed end 3 configured for receiving unsorted timber bodies. The unsorted timber bodies provided to the infeed end 3 may of course be pre-sorted regarding obvious aspects such as for instance sort / species, thick logs and thin logs, obvious quality such as visible knots, curvature, etc. These types of presorting are usually performed already in the forest by the harvester / forwarder, and / or at arrival at the timber yard.

[0033] The unsorted timber bodies may be provided to the infeed end 3 using more or less automated equipment loading the timber bodies, or be manually loaded. The infeed end 3 may be associated with a timber receiving table (not disclosed) loaded by means of a crane or wheelloader. Preferably the timber bodies are loaded into the infeed end 3 having the timber bodies oriented in the same fashion, i.e. all having the top-ends in the same direction, preferably in the downstream direction. The timber bodies may be un-barked and / or partially or fully debarked when entering the infeed end 3 of the timber sorting station 2.

[0034] The timber sorting station 2 comprises an infeed conveyer 4 configured for transport - ing / feeding / conveying the unsorted timber bodies from the infeed end 3 of the timber sorting station 2 to the next step. The infeed conveyer 4 is preferably an endless conveyer of conventional type, wherein the timber bodies are fed in an axial direction one by one after each other.

[0035] The timber sorting station 2 further comprises a primary sorting apparatus, generally designated 5. The primary sorting apparatus 5 comprises a first measuring / classification unit 6 configured for classifying each timber body into predetermined classes. The first classification unit 6 is located adjacent the infeed conveyer 4, and may be configured to make one or more classifications. The classifications may be one or more of timber sort / specie, diameter, occurrence of knots and / or other defects, curvature along the length of the timber body, degree of tapering, optimal dividing pattern / strategy, etc.

[0036] The primary sorting apparatus 5 further comprises a plurality of primary collecting com- partments / tables 7 corresponding to said predetermined classes, wherein each specific collecting compartment 7 is configured to receive all timber bodies of one of the predetermined classes. The plurality of primary collecting compartments 7 are located downstream the infeed conveyer 4, preferably the plurality of primary collecting compartments 7 are arranged in parallel to each other and at an angle in relation to the extension of the infeed conveyer 4. Thereby the timber bodies may be discharged from the infeed conveyer 4 in the lateral direction in relation to the axial extension of the infeed conveyer 4. Thus, the infeed conveyer 4 is also known as log sorting conveyer. According to alternative embodiments, the plurality of primary collecting compartments 7 are located on both sides of the infeed conveyer 4. The number of collecting compartments of the plurality of primary collecting compartments 7 of the primary sorting apparatus 5 is preferably equal to or more than 4 and equal to or less than 10, more preferably equal to more than 6 and equal to or less than 8.

[0037] The timber sorting station 2 further comprises a secondary sorting apparatus, generally designated 8, located downstream the primary sorting apparatus 5. The secondary sorting apparatus 8 comprises a second measuring / classification unit 9 configured for batchwise classification of each timber body of the predetermined classes at a time into temporary sub-classes. The second classification unit 9 may be configured to make one or more classifications. The classifications may be one or more of timber sort / specie, diameter, occurrence of knots and / or other defects, curvature along the length of the timber body, degree of tapering, optimal dividing pat- tern / strategy, etc. The second classification unit 9 may perform its classification based on the same or different classification principle as the first classification unit 6, i.e. the first classification unit 6 may have a diameter deviation of 30-40 millimetres per class and the second classification unit 8 may have a diameter deviation of 10-15 millimetres per sub-class. Another illustrating example is that the first classification unit 6 has made one class comprising knot-free timber bodies and the second classification unit 9 divide this knot-free class into temporary sub-classes based on diameter. For each class originating from the primary sorting apparatus 5 and provided to the secondary sorting apparatus 8 different classification can be made.

[0038] The secondary sorting apparatus 8 further comprises a plurality of secondary collecting compartments / tables 10 corresponding to said temporary sub-classes, wherein each specific secondary collecting compartment 10 is configured to receive all timber bodies of one of the temporary sub-classes.

[0039] According to various embodiments, the timber bodies collected / stored in one of the primary collecting compartments 7 of the primary sorting apparatus 5 is transported by means of a crane, wheel-loader, or the like, batchwise to the secondary sorting apparatus 8.

[0040] According to various embodiments, the timber sorting station 2 further comprises an intermediate conveyer 11, wherein said intermediate conveyer 11 extends from the primary collecting compartments 7 to the secondary collecting compartments 10 and is configured for batchwise conveying the timber bodies of one of the predetermined classes at a time. The second classification unit 9 is preferably located adjacent said intermediate conveyer 11. The timber bodies collected / stored in one primary collecting compartment 7 is transported one by one to the secondary sorting apparatus 8.

[0041] The plurality of secondary collecting compartments 10 are located downstream the intermediate conveyer 11, preferably the plurality of secondary collecting compartments 10 are arranged in parallel to each other and at an angle in relation to the extension of the intermediate conveyer 11. Thereby the timber bodies may be discharged from the intermediate conveyer 11 in the lateral direction in relation to the extension of the intermediate conveyer 11. Thus, the intermediate conveyer 11 is also known as log sorting conveyer. According to alternative embodiments, the plurality of secondary collecting compartments 10 are located on both sides of the intermediate conveyer 11. The number of collecting compartments of the plurality of secondary collecting compartments 10 of the secondary sorting apparatus 8 is preferably equal to or more than 2 and equal to or less than 4.

[0042] According to various embodiments, the timber bodies collected / stored in one of the secondary collecting compartments 10 of the secondary sorting apparatus 8 is transported by means of a crane, wheel-loader, or the like, batchwise to the subsequent process step or to an intermediate storage.

[0043] According to various embodiments, the timber sorting station 2 has an outfeed end 12 configured for discharging sorted timber bodies. For instance the timber sorting station 2 further comprises an outfeed conveyer 13, wherein said outfeed conveyer 13 extends from the secondary collecting compartments 10 to the outfeed end 12 of the timber sorting station 2 and is configured for batchwise conveying the timber bodies of one of the temporary sub-classes at a time to the outfeed end 12 of the timber soring station 2. The timber bodies collected / stored in one secondary collecting compartment 10 is transported one by one to the subsequent process step.

[0044] According to alternative embodiments the timber sorting station 2 further comprises a tertiary sorting apparatus arranged in the same way as the secondary sorting apparatus 8, and located downstream the secondary sorting apparatus 8 and upstream the outfeed end 12 of the timber sorting station 2.

[0045] According to various embodiments, the timber handling plant 1 further comprises a loading station 14 configured for receiving unsorted timber bodies and located upstream the in- feed end 3 of the timber sorting station 2. According to various embodiments, at the loading / in- feed station 14, the timber bodies are turned such that all timber bodies have the same orientation and are transported to the timber sorting station 2 having for instance the top-end as the leading end. By arranging the primary sorting apparatus 5 and the secondary sorting apparatus 8 according to figure 1, the timber bodies are then oriented to have the but-end as the leading end when transported from the primary sorting apparatus 5 to the secondary sorting apparatus 8, and finally the timber bodies are oriented to have the top-end as the leading end when transported from the secondary sorting apparatus 8 to the outfeed end 12 of the timber sorting station 2. According to various embodiments the loading station 14 may comprise a but-end trimmer and / or a debarking unit. Thereby a more precise classification of the timber bodies can be performed by the first classification unit 6 and by the second classification unit 9.

[0046] According to various embodiments, the timber handling plant 1 further comprises a sawmill 15 configured for dividing sorted timber bodies into a plurality of smaller timber pieces during a timber body dividing operation. The sawmill 15 is located downstream the timber sorting station 2.

[0047] According to various embodiments, a third classification unit is arranged in connection with the inlet of the sawmill in order to be able to reject individual timber bodies, which for some reason should not belong to the specific sub-class. For instance, one timber body may by mistake have stayed in the specific secondary colleting compartment 10 from the previous batch having different dimensions / class than intended.

[0048] The sawmill 15 comprises a plurality of stations including one or more machines for dividing a timber body (such as log or block / cant) into smaller timber pieces (such as planks or boards). The timber pieces are fed into the loading end of the saw line and boards leave the saw line at the output end thereof.

[0049] In general, an individual machine configured for dividing a timber body into smaller timber pieces, comprises a feeder unit and a sawing station, wherein the feeder unit is located upstream the sawing station, seen in the feeding direction of the timber body. The sawing station comprises three or four band saws having one endless saw band / blade each. The timber body is divided into smaller timber pieces by the saw bands as it is fed into / through the sawing station by the feeder unit. The machine may also comprise a downstream feeder / pulling unit, configured to pull the smaller timber pieces out of the sawing station and to feed the smaller timber pieces towards the next station in the saw line.

[0050] According to various embodiments, the location of each saw band is adjustable in the transverse direction in relation to the feed path of the timber body, by displacing the saw band in relation to the supporting framework / column of the band saw and / or by displacing the entire band saw. Thereby, different timber bodies may be divided into a variable number of smaller timber pieces that presents variable dimensions, in order to optimize the output from the raw material / timber body.

[0051] In some situations the timber body, especially when in the shape of a four-sided cant, is curved / arched along the length thereof, e.g. having a radius of curvature from about 50 meters and up, wherein a straight timber body has infinite radius of curvature, which means that the bow height of a 4 meter long timber body may be as big as 40 millimeters. Thus, the timber body is preferably curve sawn in order to obtain an optimal output, wherein curve sawing means that, during the timber body dividing operation, the timber body is fed along a curve path which corresponds to the inherent curvature of the timber body. Conventionally this is at least partly realized by means of controlling the orientation / operation of the feeder unit.

[0052] Since the dimensional variation among the timber bodies of a specific sub-class from one of the secondary collecting compartments 10 is minimal, the sawmill 15 does not need to be adjusted between individual timber bodies and thereby the gap between each pair of timber bodies can be minimal, or almost zero. Thereto the feed rate can be adapted to the specific subclass, i.e. thinner timber bodies may be fed at higher speed than thicker timber bodies. For conventional setup having greater variations within a class, the feed rate has to be adapted to the thickest timber body of the batch slowing down the entire process. Using the present invention the feed rate may be maximized / optimized for each sub-class.

[0053] Thus, according to the inventive method for controlling the timber handling plant 1 according to the above, the method comprises the steps of:

[0054] - feeding unsorted timber bodies from the infeed end 3 of the timber sorting station 2 to the plurality of primary collecting compartments 7 of the primary sorting apparatus 5,

[0055] - classifying each timber body by the first classification unit 6 into predetermined classes,

[0056] - sorting the classified timber bodies into the corresponding primary collecting compartments 7,

[0057] - batchwise feeding the timber bodies of one of the predetermined classes at a time to the plurality of secondary collecting compartments 10 of the secondary sorting station 8,

[0058] - classifying each timber body of one of the predetermined classes at a time by the second classification unit 9 into temporary sub-classes, and

[0059] - sorting the classified timber bodies into the corresponding secondary collecting compartments 10.

[0060] Feasible modifications of the Invention

[0061] The invention is not limited only to the embodiments described above and shown in the drawings, which primarily have an illustrative and exemplifying purpose. This patent application is intended to cover all adjustments and variants of the preferred embodiments described herein, and the present invention is consequently defined by the wording of the appended claims and the equivalents thereof and the equipment can be modified in all conceivable ways within the scope of the appended claims.

[0062] It shall also be pointed out that all information about / concerning terms such as above, under, upper, lower, etc., shall be interpreted / read having the equipment oriented according to the figures, having the drawings oriented such that the references can be properly read. Thus, such terms only indicates mutual relations in the shown embodiments, which relations may be changed if the inventive equipment is provided with another structure / design.

[0063] It shall also be pointed out that even thus it is not explicitly stated that features from a specific embodiment may be combined with features from another embodiment, the combina- tion shall be considered / regarded obvious, when the combination is possible.

Claims

Claims1. Timber handling plant (1) comprising a timber sorting station (2) having an infeed end (3) configured for receiving unsorted timber bodies, wherein the timber sorting station (2) comprises:- an infeed conveyer (4) for unsorted timber bodies, wherein the infeed conveyer (4) extends from the infeed end (3) of the timber sorting station (2), and- a primary sorting apparatus (5) comprising:- a first classification unit (6) for classifying each timber body into predetermined classes and located adjacent said infeed conveyer (4), and- a plurality of primary collecting compartments (7) corresponding to said predetermined classes and each configured to receive all timber bodies of one of the predetermined classes, wherein the primary collecting compartments (7) are located downstream said infeed conveyer (4), the timber handling plant (1) being characterized in that the timber sorting station (2) further comprises:- a secondary sorting apparatus (8) located downstream the primary sorting apparatus (5) and comprising:- a second classification unit (9) for batchwise classification of each timber body of one of the predetermined classes at a time into temporary sub-classes, and- a plurality of secondary collecting compartments (10) corresponding to said temporary sub-classes and each configured to receive all timber bodies of one of the temporary subclasses.

2. The timber handling plant (1) according to claim 1, wherein the timber sorting station (2) further comprises:- an intermediate conveyer (11) of the timber sorting station (2), wherein said intermediate conveyer (11) extends from the primary collecting compartments (7) to the secondary collecting compartments (10) and is configured for batchwise conveying the timber bodies of one of the predetermined classes at a time, wherein the second classification unit (9) is located adjacent said intermediate conveyer (11).

3. The timber handling plant (1) according to claim 1 or 2, wherein the timber sorting station (2) has an outfeed end (12) configured for discharging sorted timber bodies.

4. The timber handling plant (1) according to claim 3, wherein the timber sorting station (2) further comprises:- an outfeed conveyer (13) of the timber sorting station (2), wherein said outfeed conveyer (13) extends from the secondary collecting compartments (10) to the outfeed end (12) of the timber sorting station (2) and is configured for batchwise conveying the timber bodies of one of the temporary sub-classes at a time.

5. The timber handling plant (1) according to any of claims 1-4, wherein the timber handling plant (1) further comprises:- a loading station (14) configured for receiving unsorted timber bodies and located upstream the infeed end (3) of the timber sorting station (2).

6. The timber handling plant (1) according to any of claims 1-5, wherein the timber handling plant (1) further comprises:- a sawmill (15) configured for dividing sorted timber bodies into a plurality of smaller timber pieces during a timber body dividing operation.

7. Method for controlling a timber handling plant (1) according to any of claims 1-6, the method being characterized by the steps of:- feeding unsorted timber bodies from the infeed end (3) of the timber sorting station (2) to the plurality of primary collecting compartments (7) of the primary sorting apparatus (5),- classifying each timber body by the first classification unit (6) into predetermined classes,- sorting the classified timber bodies into the corresponding primary collecting compartments (7),- batchwise feeding the timber bodies of one of the predetermined classes at a time to the plurality of secondary collecting compartments (10) of the secondary sorting station (8),- classifying each timber body of one of the predetermined classes at a time by the second classification unit (9) into temporary sub-classes, and- sorting the classified timber bodies into the corresponding secondary collecting compartments (10).

8. The method according to claim 7, wherein method further comprises the steps of:- batchwise feeding the timber bodies of one of the temporary sub-classes at a time to the out- feed end (12) of the timber sorting station (2).

9. The method according to claim 8, wherein method further comprises the steps of:- in a sawmill (15) dividing the sorted timber bodies into a plurality of smaller timber pieces.

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