EP4065324A1

EP4065324A1 - Method and device for separating sawn timber packs into main yield and side cuttings

Info

Publication number: EP4065324A1
Application number: EP20808044.0A
Authority: EP
Inventors: Martin RENDLER
Original assignee: Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
Current assignee: Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
Priority date: 2019-11-26
Filing date: 2020-11-13
Publication date: 2022-10-05
Also published as: DE102019132031A1; JP2023504093A; US20220411202A1; CA3158606A1; WO2021104895A1; US12071315B2

Abstract

In a method for separating a sawn timber pack obtained from one trunk into main yield and side cuttings using a separating conveyor, the sawn timber pack is conveyed in a longitudinal direction via an underside transport device of the separating conveyor. While the single- or multi-piece main yield is supported by the transport device, one or more side boards are separated transverse to the conveying direction using gravitational force and/or external forces, whereby lateral retaining elements are briefly opened for release. In order to be able to process trunks with as large a diameter range as possible, the side boards located on opposing sides of the sawn wood pack are separated in two consecutive separating stages, whereby the lateral retaining elements of the separating conveyor are opened on one side on a respective release side in the consecutive separating stages.

Description

Method and device for separating packages of sawn timber into main and side goods

description

The present invention relates to a method for separating a parcel of lumber obtained from a trunk into main and side goods with the aid of a separating conveyor, in which the parcel of lumber is conveyed in the longitudinal direction via a transport device on the underside and while the single or multi-stemmed main goods are supported by the transport device side boards are separated transversely to the longitudinal direction using the effect of gravity.

The invention also relates to a corresponding separating conveyor with a transport device on the underside and controllable, lateral Haltelemen th and with a control device which is designed to open the lateral Hal teelemente for dropping one or more sidewood boards.

In sawmills, logs are cut along their longitudinal axis by a saw device, in particular a gang saw. Since the logs differ in size, they are measured in order to determine a cut that is optimized for the shape of the log. When cutting, boards are created that are available as a package of sawn timber. The sawn timber package comprises a single or multi-stemmed main material core and side goods, consisting of one or more side goods boards. The main product is located in an inner area of the lumber package, while the side product is located on the sides of the lumber package. Since main and side goods are usually intended for un ferent purposes, they are separated after cutting and processed separately.

For reasons of efficiency, the main and side goods are separated during the longitudinal transport with the aid of a separating conveyor. Such a separating conveyor is described in DE 202006012507 U1. There, the main goods rests on a transport device on the underside and is transported by this in the longitudinal direction, while the side goods are attached to the by holding elements Main product is pressed. In order to separate the side goods from the main goods, the holding elements on both sides of the sawn timber package are briefly opened so that the side boards on both sides fall down.

Transport rollers serve as the transport device. In order to be able to adapt the transport device to main goods packages of different strengths, it must be adjustable in width. For this purpose, successive trans port rollers are designed to be displaceable to one another in the transverse direction, so that they can be arranged laterally offset to one another. The maximum adjustment width that can be achieved in this way is three times the roll width, namely if, starting from the middle position in which all the rolls are in the middle, one roll is arranged on the left and one on the right of the central roll. This results in an adjustment range between a minimum of one roll width and a maximum of three roll widths. This means a restriction on the maximum and minimum log diameters that can be processed in such a system.

An object of the invention is to provide a method and a device for separating a package of sawn timber obtained from the trunk into main and side goods, which have no such restrictions for the adjustment range, so that logs of a larger diameter range can be processed.

The object is achieved with regard to the method by the features of claim 1 and with regard to the device by the features of claim 3. Advantageous embodiments can be found in the dependent claims.

In a method of the type mentioned at the outset, the invention provides that the side boards located on opposite sides of the lumber package are separated in successive separating stages by opening lateral holding elements of the separating conveyor on one side in each of the successive separating stages. By separating the chute of the sideboards on one and the other side of the sawn timber package in successive steps, geo- Metric restrictions for the maximum or minimum width of the main goods package.

In a preferred embodiment of the invention, the transport device is adjusted transversely to the conveying direction in the successive separating stages to set a respective einsei term discharge edge and the holding elements are opened on the side of the discharge edge to throw off the sides.

By means of a lateral adjustment movement of the transport device transversely to the conveying direction, it is thus possible to react to fluctuating lumber dimensions and / or varying positions of the side goods in the lumber package.

Correspondingly, the separating conveyor according to the present invention has at least two successive separating stages in order to separate the sidewood boards located on opposite sides of the lumber package on one side each. In addition, a control device is provided which is designed to open the lateral holding elements on one side in each case in the successive separating stages.

The transport device thus forms a one-sided discharge edge in each of the two separation stages, so that the side goods are thrown off on one side of the lumber package in the first separation stage and the side goods on the other side of the lumber package in the second separation stage.

In the first separation stage, the lumber package with the main goods rests on the transport device on the underside, while the side goods on both sides of the lumber package are held by lateral holding elements. The part of the side goods to be thrown hangs in the first separation stage on one side beyond the transport device, so that the side end of the transport device forms a throwing edge after opening the holding elements on this side, while the other part of the side goods put on the opposite side The side of the lumber package is located above the transport device on the underside.

As soon as a side goods drop is to take place, the lateral holding elements on the side of the drop edge are brought into an open position. Through the one lateral opening of the holding elements causes gravity alone or in conjunction with an additionally acting force to separate those sidewood boards which protruded beyond the dropping edge. The lateral retaining elements, which are located on the other side of the sawn timber package, remain unchanged and represent the lateral boundary corresponding to the width of the remaining part of the sawn timber package.

After the side goods have been dropped, the sawn timber package leaves the first separation stage and enters the second separation stage. In the second separation stage, the lumber package only includes the main goods and the remaining side goods, which now protrude on the other side over the discharge edge of the transport device. As soon as the second part of the side goods is to be separated from the main goods, the lateral holding elements on the drop side of the second separation stage are opened. As a result, as a result of the action of gravity and / or an additionally acting force, the second part of the side product falls down on one side along the discharge edge of the second separation stage. Astonishingly, he succeeds in significantly increasing the flexibility of the separation process through a sequential one-sided side goods drop. In contrast to the prior art, only the position of the lumber package relative to a single discharge edge and the one-sided opening of the corresponding retaining elements are important for the method described. Due to the fact that the holding elements remain closed on the opposite side, there is no need for a second discharge edge. As a result, the underside transport device can have any width and the adjustment range corresponds to the total width of the transport device. In comparison to the prior art, this means that the lower limit of the adjustment range due to the design can be eliminated, so that parcels of lumber with dimensions that are smaller than the total width of the transport device can be handled reliably.

In particular, it can be provided that the transport device can be adjusted transversely to the transport direction in the separating stages and the control device is designed to set the transport device in the successive separating stages to form a unilateral drop edge and to drop the sidewalls the holding elements on the side of the Ab to open the throwing edge. The width setting to adapt to different strong packs of sawn timber are thus achieved by simply adjusting the transport device transversely with respect to the lateral holding elements.

In order to achieve adjustability, the transport device on the underside can be guided on rails or axes running transversely to the conveying direction, along which it can be adjusted. The adjustment movement can take place via electromechanical or hydraulic actuators that can be controlled by the control unit.

In order to set a required position of the discharge edge, the control unit can record information about the dimensions of the package of sawn timber and the position of the side goods within the package of sawn timber. These are known for each of the successive packages of lumber usually from the setting of the preceding sawing device. From this, an adjustment path and an adjustment position for the underside transport device can be determined as a function of each lumber package, so that its position can be adapted to the dimensions and position of the relevant lumber package.

The formation of a one-sided discharge edge and lateral transverse adjustment of the transport device can in particular be implemented in that the transport device is mounted on one side in each of the two separation stages on its side opposite the discharge edge. Since the shedding of the Be tenware according to the invention takes place on one side within a separation stage, the other side of the transport device can be used to attach storage components and / or drive elements for the transport device on the underside. As a result, the device can be made robust and low-maintenance.

In a preferred embodiment, the separating conveyor has a knock-off device in each of the two separation stages, which is arranged on the side of the respective discharge edge. You can exert additional forces on sideboard boards if they cannot be released from the main product independently as a result of gravity. The formation of the impact devices from can be particularly advantageous when logs are sawn at low temperatures and the surfaces of the main and Sideboards freeze to one another due to natural or process-related moisture. An exertion of force by the knock-off device can take place both through a collision of the side product with a stationary element of the knock-off device or also through a movement of the Abschlagvor direction, which can be directed in particular along the force of gravity.

In a further preferred embodiment, the holding elements can be adjusted on both sides in order to adapt to different dimensions of successive parcels of wood and to open them on one side in the horizontal direction transversely to the transport direction. Thus, by adjusting the lateral distance between the holding elements, an adjustment to the width of the Sawnwood package can be made and by opening one side, the sidewood boards can be dropped on the corresponding page, in both cases the transverse movement of the Hal teelemente can be done by the same actuators.

The movement of the holding elements can in particular take place in a straight line, so that simple linear drives and guides can be used. Compared to pivoting movements of the lateral holding elements, a straight travel movement is advantageous because the holding element can be aligned with a contact surface parallel to the side of the lumber package to be held at any time. This increases the flexibility of the separating conveyor in particular with fluctuating lumber dimensions, in that the closed position of the respective holding element can only be adjusted in a force-controlled manner. In addition, a combined linear and pivoting movement is also conceivable.

As an alternative or cumulative to a transverse adjustment of the transport device to adapt to the dimensions of the lumber package, provision can also be made for the holding elements on the side opposite the one-sided ejection to be laterally adjusted transversely to the transport direction in order to adjust the width for successive lumber packages on a unilateral discharge edge formed by the transport direction become. Instead of adjusting the transport device in the transverse direction, the retaining elements on the side opposite the dropping point, which serve as a side limit for the part of the lumber package that is not to be dropped, can also - or additionally - be adjusted laterally relative to the transport device. In the closed position, the lateral retaining elements are used to guide the package of sawn timber along the transport direction in the correct position to the throwing edge and to hold both the main and the sidewood boards. This closed position can be maintained by means of a force control, as a result of which the reliability of the transport can be increased.

The lateral holding elements can, for. B. be designed as baffles, which can extend over part or the entire length of a separation stage. In a preferred embodiment, however, several holding rollers are provided as lateral holding elements, which can be adjusted transversely to their axis by means of corresponding actuators. The sideboards are supported with little friction by the rollers. A movement of the holding rollers can be effected via the control device. This can be path-controlled or force-regulated, in order to create constant contact pressure conditions for the lumber package and to ensure the reliability of the transport and the throwing off.

In a preferred embodiment of the separating conveyor, several holding rollers of a separating stage are combined to form a holding roller group, the holding rollers being mechanically coupled to one another in such a way that they can only be adjusted together. By jointly adjusting several holding rollers, fewer actuators, guide elements and bearing components are required. The mechanical coupling of the holding rollers can be formed by a holding roller carrier, which can be moved on linear guides by at least one pneumatic, hydraulic or electromechanical positioning unit.

It is particularly useful here if each of the separating stages comprises two or more holding roller groups on each side. Thus, the front holding roller group can already be positioned for the following lumber package, while a holding roller group further behind it still holds and guides the previous one.

The separating conveyor according to the invention comprises a transport device on the underside on which the package of lumber rests and can be transported along a transport direction. The transport can be carried out via a frictionally Sige power transmission from the transport element to the lumber package take place and / or by form-fitting drivers that allow a clear positioning of the lumber package on the underside transport device.

In a preferred embodiment, the transport device on the underside comprises one or more transport rollers, over which the package of sawn timber is moved along the conveying direction. At least a part, preferably all of the transport rollers, are expediently driven via a drive for transporting the package of sawn timber. The drive of the individual trans port rollers can be done together, in groups or separately.

During transport, the main goods therefore lie on one or more transport rollers and are moved in the conveying direction by their rotational movement. The transport rollers are designed essentially cylindrical and can form the discharge edge for the discharge by means of a circumferential edge. The drive can take place in a conventional manner via an electrical machine, in particular with a frequency converter or a hydraulic motor, in particular an oil motor. In addition, a transmission can be provided in order to achieve different conveying speeds.

Rollers are robust and not susceptible to failure and do not get dirty quickly. In particular, smoothly designed transport rollers offer the advantage that deposits can only accumulate on them with difficulty. Furthermore, they can have a coating with which slippage between the main goods and the transport rollers can be avoided and / or adjusted in a targeted manner. For example, the transport rollers can be operated at slightly higher speeds than the Fördergeschwindig in order to enlarge gaps between successive packages of sawn timber.

In a further preferred embodiment, several of the transport rollers are grouped into a transport roller group in each of the separating stages, the transport rollers of a transport roller group being arranged on a common carrier element. This not only simplifies assembly, but also allows transverse adjustment of the transport roller group via a common actuator. Several transport rollers can in particular be combined to form an assembly by being arranged on a common carrier element, for example a traverse or a profiled carrier or carrier assembly. The carrier element can be designed uniformly for all transport roller groups and have mechanical interfaces for axle elements on which the transport rollers are mounted. Furthermore, the carrier element can have interfaces in order to bring electrical drives for driving the transport rollers. In addition, the carrier element can have guide rails as well as pneumatic, hydraulic or electromechanical positioning units, via which a plurality of transport rollers can be mechanically coupled along their adjustment movement in order to form the unilateral discharge edge. This allows the number of components required to be reduced. In particular, the transport rollers can be grouped in a corresponding manner to form a grouping of the lateral holding rollers.

In a further preferred embodiment of the separating conveyor, it has one or more top-side, vertically adjustable pressure rollers which are formed from exerting a pressure force on the parcel of cut wood during longitudinal transport. In this way, the main goods can be fixed over the entire length of the separating conveyor during transport and secured against tilting. This is particularly advantageous when the lateral Hal teelemente are brought into the open position and the lumber package is no longer held on the corresponding side. In addition, main boards can protrude above the package of sawn timber as a result of vibrations during transport. Pressure rollers can serve to push the cantilevered main boards back in the direction of the underside Transportvor direction, whereby the reliability of the transport is increased.

Similar to the lateral holding rollers, it is also possible to combine several pressure rollers of a separating stage to form a pressure roller group, wherein the pressure rollers can be mechanically coupled to one another in such a way that they can only be adjusted together into the respective pressure position. The mechanical coupling can be formed by a common carrier element which is moved along linear guides by a pneumatic, hydraulic cal or electromechanical positioning unit. This saves actuators, guide elements and bearing components. To- Additionally or instead of a linear movement for adjusting the pressure rollers, a pivoting movement of the pressure rollers is also conceivable. In the latter case, ie if their adjustability is realized by a pivoting movement, the pressure rollers are preferably not coupled to one another in groups, but rather operated individually.

In a further preferred embodiment of the separating conveyor, at least the lower-side transport device and the lateral holding elements of the two separating stages are arranged in mirror image to one another. The mirror-image structure of the separation stages simplifies the construction and assembly as well as the commissioning of the separation conveyor, since control principles can be transferred at least partially from the first separation stage to the second.

Further advantages and refinements can be found in the following description of exemplary embodiments with reference to the figures. It shows:

FIG. 1 shows a first separating stage of a separating conveyor along the transport direction of a lumber package;

FIG. 2 is an isometric view of the first separation stage;

FIG. 3 shows a second separating stage of the separating conveyor, which is located downstream of the first separating stage;

Figure 4 is an isometric view of the second separation stage and

Figure 5 shows an alternative embodiment of a separation stage with a Abschlagvor direction.

FIG. 1 shows a first separating stage 1 - 1 of a separating conveyor 1, which transports a lumber package 2 along a conveying direction 3. The lumber package 2 consists of the main goods boards 4 and the side goods boards 5-1 and 5-2, which are arranged in the conveying direction 3 on the left and right of the main goods boards 4. In the illustrated FIG. 1, the side boards 5 - 1 are separated from the main boards 4. During the transport, the main boards 4 are arranged side by side and are supported along a continuous support width 6-1 on the transport device 7 on the underside. The transport device comprises several transport rollers 7-1, which are arranged one behind the other in the transport direction.

The transport rollers 7-1 each have an axis of rotation 8-1 and are connected on one bearing side to an electrical machine 9-1, through which the transport rollers 7-1 are set in a rotational movement about their axis of rotation 8-1. This results in the movement of the lumber package 2 along the conveying direction 3.

The sidewood boards 5-1 and 5-2 are initially not on the transport rollers 7-1 during transport, but are pressed by lateral Halteele elements 10 in the form of holding rollers 10-1 and 11-1 to the main goods boards 4 ge. As a result, a frictional force is generated, by means of which the sidewood boards 5-1 and 5-2 can be transported freely floating.

The holding rollers 10-1 and 11-1 can be adjusted in a straight line between a closed position and an open position. For linear drives 12-1 and 13-1 are used, which are connected to the storage of the holding rollers 10-1 and 11-1. Further holding rollers are not visible here behind the visible holding rollers 10-1 and 11-1 one behind the other. As an alternative or in addition to the linear drives 12-1 and 13-1 shown, the separating conveyor can have positioning units with which a pivoting movement of the holding rollers 10-1 and 11-1 can be carried out.

The transport rollers 7-1 are adjustable along their axis of rotation 8-1 transversely to the conveying direction 3. The adjustment takes place via a linear drive 14-1, with which a discharge edge 15-1 is set before the entry of a lumber package 2, which is almost flush with the main product 4.

As soon as the ejection position of the first separation stage is reached, the holding rollers 10-1 on the ejection side are moved away from the lumber package 2 via the linear drive 12-1, whereby the frictional engagement between the sides of goods boards 5-1 and the main goods boards 4 is dissolved. About the difficult by force 16, the free-floating sideboard 5-1 detach from the lumber package 2 and fall down, as shown. In addition, a knock-off device (see FIG. 5) can be arranged in the area of the side boards to be separated 5-1 in order to loosen them from the main goods. In addition, a sliding plane (not shown here) can be used to influence the Ablösegeschwin speed and direction of the sidewood boards 5-1 as required.

Pressure rollers 17-1 are formed above the package of sawn timber and are arranged one behind the other in the direction of transport. In a pressing position, they exert pressing forces on the main goods boards 4, which prevents an undesired vertical lifting of individual main goods boards from the transport roller. In addition, the pressure rollers 17-1 serve to secure the main boards 4 against tilting during the dropping process.

In order to be able to handle different heights of lumber stacks, the pressure roller 17-1 can be moved into a pressure position in the vertical direction by a linear drive 18-1. Alternatively or additionally, a pivot mechanism can be provided in order to realize the movement of the pressure roller 17-1.

In order to reduce the number of bearing and drive components required, the adjustment movements of several transport rollers 7-1, holding rollers 10-1 and 11-1 and pressure rollers 17-1, which are arranged one behind the other, are each rigidly coupled. This can be seen in FIG.

The first separating stage 1 -1 of a separating conveyor 1 shown in FIG. 2 comprises nine transport rollers 7-1, which are connected to their respective electrical machines 9-1. Of the nine transport rollers 9-1 shown, three are combined to form a transport roller group 19-1. The trans port rollers of the transport roller group 19-1 are formed on a common Trä gerelement 20-1. The carrier element can be moved transversely to the transport direction via the linear drive 14-1, whereby the discharge edge 15-1 can be adjusted.

Furthermore, the first separating stage 1-1 comprises nine holding rollers 11-1, of which three holding rollers 11-1 are combined to form a holding roller group 21-1 are. The holding rollers 11-1 of the holding roller group 21-1 are mechanically rigidly coupled via a carrier 22-1, which can be moved in the transverse direction via the linear drive 13-1, so that the holding rollers 11-1 of the holding roller group 21-1 only together between their respective closed position and their open position are adjustable.

Furthermore, the first separating stage 1-1 comprises nine holding rollers 10-1, of which three holding rollers are combined to form a holding roller group 23-1. The holding rollers of the holding roller group 23-1 are mechanically rigidly coupled via a carrier 24-1 analogous to the holding roller group 21-1, whereby only a common transverse adjustment of the holding rollers 12-2 of the respective holding roller group 23-1 between an open position and a closed position errei chen leaves.

Furthermore, the first separating stage 1-1 comprises nine pressure rollers 17-1, of which three pressure rollers 17-1 are combined to form a pressure roller group 25-1. The pressure rollers 17-1 of the pressure roller group 25-1 are mechanically rigidly coupled via a carrier 26-1, which can be moved vertically via the linear drive 18-1 to bring the grouped pressure rollers 17-1 each Weil into a pressing position. Alternatively or additionally, a swivel mechanism can be provided in order to realize the movement of the pressure roller group 25-1.

After the sidewood boards 5-1 have been dropped, the lumber package 2 leaves the first separating stage 1-1 and enters the second separating stage 1-2, which is shown in FIG.

The second separation stage 1 -2 is built in mirror image to the first separation stage 1 -1.

After the side boards 5-1 have been dropped, the lumber package 2 only includes the main boards 4 and the side boards 5-2 held in the first separating stage 1 -1, which are detached from the main goods in the second separating stage 1-2 as shown in FIG. During the transport of the parcel of lumber 2 along the conveying direction 3 in the second separating stage 1-2, the main goods 4 lie along a support width 6-2 on a transport roller 7-2. This has an axis of rotation 8-2 via which the transport roller 7-2 is driven on a bearing side via an electrical machine 9-2.

The lateral holding elements of the second separating stage 1-2 include the holding rollers 10-2 and 11-2. These can be adjusted in a straight line between a closed position and an open position. Linear drives 12-2 and 13-3, which are connected to the axes on which the holding rollers 10-2 and 11-2 are mounted, are used for this purpose. Further holding rollers 10-2 and 11-2 are not visible here one behind the other. As an alternative or in addition to the linear drives 12-2 and 13-2 shown, the separating conveyor can have positioning units with which a pivoting movement of the holding rollers 10-2 and 11-2 can be carried out.

The transport rollers 7-2 can be adjusted transversely to the conveying direction 3 along an axis of rotation 8-2. The adjustment takes place via a linear drive 14-2, with which a discharge edge 15-2 is set before the entry of a lumber package 2, which is almost flush with the main product 4. The discharge edge 15-2 is located on the opposite side with respect to the lumber package 2 to the discharge edge 15-1 from the first separation stage 1-1.

As soon as the discharge position of the second separation stage 1-2 is reached, the holding rollers 10-2 on the discharge side are moved away from the lumber package 2 via the linear drive 12-2, whereby the frictional engagement between the sides of goods boards 5-2 and the main goods boards 4 is dissolved. Via the force of gravity 16, the free-floating sideboards 5-2 are released from the lumber package 2 and fall down, analogous to the mode of action of the first separating stage 1- 1. In addition, a knock-off device (cf. FIG. 5) can be arranged in the area of the sideboard 5-2 to be separated in order to remove it from the

To solve main goods. In addition, a sliding plane (not shown here) can be used to influence the detachment speed and direction of the sidewood boards 5-2 as required. Pressure rollers 17-2 are formed above the package of sawn timber and are not visibly arranged one behind the other here. In a pressing position they exert pressing forces on the main goods boards 4, which prevents an undesired vertical lifting of individual main goods boards from the transport roller. In addition, the pressure rollers 17-2 serve to secure the main boards 4 from tilting during the dropping process.

In order to be able to handle different heights of lumber stacks, the pressure roller 17-2 can be moved into a pressing position by a linear drive 18-2. Alternatively or additionally, a pivot mechanism can be provided in order to realize the movement of the pressure roller 17-1.

In order to reduce the number of bearing and drive components required, the adjustment movements of the transport rollers 7-2, the holding rollers 10-2 and 11-2 and the pressure rollers 17-2 are each rigidly coupled. This can be seen in FIG.

In order to realize a synchronous movement of the transport rollers 7-2, the holding rollers 10-2 and 11-2 and the pressure rollers 17-2, they are each rigidly coupled analogously to the first Se parierstufe 1-1, which can be seen in FIG.

The second separating stage 1-2 of a separating conveyor 1 shown in FIG. 4 comprises nine transport rollers 7-2, which are connected to their respective electrical machine 9-2. Of the nine transport rollers 9-2 shown, three are combined to form a transport roller group 19-2. The trans port rollers of the transport roller group 19-2 are formed on a common Trä gerelement 20-2. The carrier element can be moved transversely to the transport direction via a (not visible) linear drive 14-2, whereby the discharge edge 15-2 can be adjusted.

Furthermore, the second separating stage 1-2 comprises nine holding rollers 11-2, of which three holding rollers 11-2 are combined to form a holding roller group 21-2. The holding rollers 11-2 of the holding roller group 21-2 are mechanically rigidly coupled via a carrier 22-2, which can be procedurally Ren via the linear drive 13-2, so that the holding rollers 11-2 of the holding roller group 21-2 only are jointly adjustable between their closed position and their open position.

Furthermore, the second separating stage 1-2 comprises nine holding rollers 10-2, of which three holding rollers are combined to form a holding roller group 23-2. The holding rollers of the holding roller group 23-2 are mechanically rigidly coupled via a carrier 24-2, analogous to the holding roller group 21-2, whereby only a common adjustment of the holding rollers 12-2 of the respective holding roller group 23-2 between an open position and a closed position can be achieved.

Furthermore, the second separating stage 1-2 comprises nine pressure rollers 17-2, of which three pressure rollers 17-2 are combined to form a pressure roller group 25-2. The pressure rollers 17-2 of the pressure roller group 25-2 are mechanically rigidly coupled via a carrier 26-2, which can be moved vertically via the linear drive 18-2 in order to bring the grouped pressure rollers 17-2 each into a pressure position. Alternatively or additionally, a swivel mechanism can be provided in order to realize the movement of the pressure roller group 25-2.

After the side goods 5-2 have been dropped, the lumber package 2, which ultimately consists of main goods boards, leaves the separating conveyor 1.

FIG. 5 shows an alternative embodiment of a separating stage of the separating conveyor 1. In comparison to the separating stages shown in FIGS. 1-4, a mechanical knock-off device 27 is arranged in the separating stage shown in FIG. 5 at the position of a pressure roller. In addition, the components of the separation stage according to FIG. 5 are identical to those of the separation stages according to FIGS. 1-4.

In the separating stage shown in Figure 5, the cutting device 27 is arranged on a carrier and comprises a cutting arm 28, which can be adapted by means of a first servo cylinder 29 transversely to the conveying direction to the position of the side goods to be cut. Furthermore, the cutting device 27 comprises a second servo cylinder 30, by means of which the cutting arm 30 can execute a cutting movement. The components of the knockdown device 27 are not limited to two servo cylinders 28, 29 and a knockdown arm 30 limited. Rather, the knock-off device 27 can have further positioning units and knock-off arms not shown in order to improve the knock-off precision and knock-off effect. It is also within the scope of the invention to arrange the knock-off device in another suitable position or orientation in or on the separating stage in order to increase the process reliability when separating the side goods from the main goods.

Claims

Expectations

1. A method for separating a lumber package (2) obtained from a trunk into main and side goods (4, 5-1, 5-2) with the aid of a separating conveyor (1), in which the lumber package (2) has a Underside transport device (7) of the separating conveyor (1) is conveyed in the longitudinal direction (3) and, while the single or multi-stemmed main product (4) is supported by the transport device (7), sidewood boards (5-1, 5-2) under the action of gravity and / or external force across the

The longitudinal direction (3) are separated, characterized in that the side boards (5-1, 5-2) located on opposite sides of the sawn timber package (2) are separated in successive separating stages (1-1, 1-2) by lateral holding elements ( 10-1) of the Sepa rierförderers (1) in the successive separation stages (1-1, 1-2) each Weil opened on one side.

2. The method according to claim 1, in which the transport device (7-1) is adjusted in the successive separating stages to set a respective one-sided discharge edge (15-1,15-2) transversely to the conveying direction (3) and to throw off the sideboard ( 5-1, 5-2) the holding elements (10-1) on the side of the discharge edge (15-1, 15-2) are opened.

3. Separating conveyor for separating a obtained from a log

Lumber packets (2) in main and side goods (4, 5-1, 5-2) during its longitudinal transport, with a transport device (7) on the underside and controllable lateral holding elements (10) and with a control device which is designed to to open the lateral holding elements (10) for dropping one or more sideboard boards (5-1, 5-2), characterized in that the separating conveyor (1) has at least two successive separating stages (1-1, 1-2), around those on opposite sides of the Lumber package located sidewood boards (5-1, 5-2), separate on each egg ner side, and the control device is designed to open the since union holding elements (10) in the successive separating stages (1-1, 1-2) on one side .

4. Separating conveyor according to claim 3, wherein the transport device (7) in the two separating stages is adjustable transversely to the transport direction (3) and in which the control device is designed, the transport device (7) in the successive separating stages to form a one-sided each Set the discharge edge (15-1, 15-2) and open the retaining elements on the side of the discharge edge to drop the sideboard.

5. Separating conveyor according to claim 4, in which the transport device (7) is mounted on one side in each of the two separating stages on its side opposite the discharge edge.

6. Separating conveyor according to one of claims 3 to 5, in which in one or both of the separating stages a knock-off device (27) for mechanical loosening of the side goods (5-1, 5-2) is arranged.

7. Separating conveyor according to one of claims 3 to 6, in which the Hal teelemente to adapt to different dimensions aufeinan derfolender lumber packets on both sides and to open on one side in the horizontal direction are adjustable transversely to the transport direction.

8. Separating conveyor according to one of claims 3 to 7, in which the Hal teelemente are laterally adjustable on the side opposite the one-sided discharge for setting successive lumber packages on a unilateral discharge edge formed by the transport direction transversely to the transport direction.

9. Separating conveyor according to one of claims 3 to 8, wherein the Hal teelemente comprise vertically arranged holding rollers (10) and the holding rollers are laterally adjustable transversely to their roller axis.

10. Separating conveyor according to claim 9, in which a plurality of holding rollers are mechanically coupled to form a holding roller group (21-1, 21-2) so that they can only be adjusted together, in particular in which each of the separating stages has two or more holding roller groups on each side includes.

11. Separating conveyor according to one of claims 3 to 10, in which the transport device comprises one or more transport rollers (7-1, 7-2) over which the lumber package is moved along the conveying direction, in particular in which at least some, preferably all the transport rollers (7-1, 7-2) are driven by a drive for transporting the package of sawn timber.

12. Separating conveyor according to claim 11, in which in each of the separating stages several of the transport rollers (7-1, 7-2) are grouped to form a transport roller group (19-1, 19-2) and the transport rollers of a Transportrol lengruppe on a common carrier element are arranged.

13. Separating conveyor according to one of claims 3 to 11, with one or more top-side, vertically adjustable pressure rollers (17-1, 17-2) which are designed to exert a pressure on the lumber package (2) during longitudinal transport.

14. Separating conveyor according to claim 13, in which in each case a plurality of pressure rollers are mechanically coupled to one another to form a pressure roller group, so that they are at least partially adjustable together.

15. Separating conveyor according to one of claims 3 to 14, in which at least the underside transport device (7) and the lateral holding elements (10) in the two separating stages (1 -1, 1 -2) are arranged in mirror image to one another.