SE526841C3 - Method and apparatus for distributing logs at an incoming transport path - Google Patents

Description

20 oo o o: oss: nu o nl ß) k !! no Q to: 000 i 0 O lo 000 000 30 526 841 aæïæa: ¿° '= -' j = _ 3 "; - = sooa 4 no 2 A nno nn none» se nu nous one In the conveyor belts with the same end first, but they can be laid with the root first once and next time placed with the top first, which means that they o fi a need to be turned before they can be sawn.

Turning of logs is done in connection with the feeding to the saw where the log is turned so that the top comes first in the transport.

This is usually done with a so-called turner which, depending on whether the top or the root comes first, turns the turner perpendicularly, towards its transport direction, either to the left or to the right to be rolled down on a conveyor track where the logs are then sorted by pushing the logs over to the sides to a collection point along the conveyor belt , alternatively directly via a barking machine to a saw.

The above-mentioned turns usually consist of an upper turning device comprising four downward arms, placed towards each other in a square relationship.

The logs are driven in perpendicularly by the conveyor belt between the downward arms, which rotate around the log in the desired direction, perpendicular to their conveying direction.

Consequently, the log is rotated so that its top first emerges from the turning device.

Under the upper rotating device comprising four downward arms, there is again an outgoing conveyor belt in relation to the above-mentioned incoming conveyor belt with a direction which is perpendicular to the incoming conveyor belt. After turning, the log rolls down into said outgoing conveyor belt which then transports the log in the direction of a sorting device or barking machine.

However, there are disadvantages to the above-mentioned handling of outgoing logs. In all handling of the above-mentioned logs, it is a wish to be able to streamline by e.g. increase the speed of transport and processing of logs.

You want to transport the logs, along the conveyor belts, with as short a distance as possible. However, it is difficult to maximize the handling during the above turning of logs as the logs when rolling down to the conveyor belt collide and roll against e.g. the side walls of the conveyor belt. As a result, there is a delay in the transport of the log before the conveyor belt can grasp the log and carry it further in its intended forward direction. This delay of the speed of the logs out of the turning device means that they, to the turning device, OI 0 0 000 0 00 I Ü 0 qc 0 000 000 0000 0 0 0 u 0 e 0 0 0 00 00 00 000 000 000 0 00 00 00 00 00 00 00 00 00 00 0 0 I 0 0 OII 0 I 0 0 00 0000 10 15 20 h) UI w O (_ * Q LW 00 -ß ... x incoming logs cannot be transported to the reversing device at the desired rate. If the incoming log arrives to the turning device for close to the previous outgoing log, the incoming log risks falling on the previous outgoing log, which means that the distance between the logs must be greater than desirable for the outgoing logs to reach the turning device before the incoming logs arrive at the turning device.

The above-mentioned delay in the transport of an outgoing log before the conveyor belt can grasp the log and carry it further in its intended forward direction, is for different reasons different from time to time. Sometimes the conveyor belt can quickly grab the log and transport the entire log out of the turning device, while the next time it can take an extra long time before the log bounces completely against walls and floors and is transported further out of the turning device. This gives a great deal of uncertainty as the time in the turning device varies from time to time, which leads to an unnecessarily large space between the logs being required, so that they do not risk colliding.

An object of the present invention is to reduce the above-mentioned distance between the incoming logs.

According to an embodiment of the present invention, an improved handling of logs is achieved after turning, whereby a faster transport of logs is obtained as stated in claim 1.

SUMMARY OF THE INVENTION A conveyor track, preferably a kerate web that transports logs in its longitudinal direction, usually transports a log from a bark peeler further towards a turning device.

The said transport path transports the log in between the turning device of the turning device with four downward arms.

When the turning device has rotated the log perpendicularly in the desired direction, the log falls down the two walls and down to an underlying distributing device with preferably four protruding ends, with space for a log. When the log has landed between two of the protruding arms of the distributing device, or just before c I O OQO OQO III! O I O O lo QIO 100 u 0 I O Û O O O O I IJ auto 00 0 OI IQ I. .IDO II .QIO O I I Û O O I I I Û Ü Û Û 0 b O DJ O 2-32-312223. 222.. ' 4 2 22% '' .. '. 2 .. .Z.' .. 'the log has landed, the distributing device begins to rotate a quarter of a turn in order to tip the log, for further transport towards further processing.

The present invention provides an opportunity to reduce the gaps between the incoming logs in connection with the turning of the log. It is possible to allow logs to enter the turning device at a shorter interval, in order to increase the number of logs per unit of time through the turning device.

Brief Description of the Drawings Figure 1 shows a side view with conveyor belts from bark scalers, partly shown on the left in the fi guren, to a turning device and an underlying distributing device for guiding logs to (left) either a conveyor belt transporting the logs to a step feeder or to (right) ) a collection point for failed logs.

Figure 2 shows a top view of Figure 1, with from left a bark peeler with an outgoing conveyor belt to a turning device (right in the figure) via a meter to feel the top or root first and thereby determine the direction of rotation of an underlying distributing device.

Detailed description of the invention The invention will be described in more detail below in connection with the example of the invention shown in the accompanying figures.

A conveyor track 1, preferably a kerate track which transports logs 2 in its longitudinal direction, usually transports a log from a bark peeler further towards a turning device.

Before the log enters the turning device of the turning device 3, the log must pass the measuring frame which determines in which direction the log 2 needs to be turned in order for the correct end to come only after the turning.

The said transport path 1 transports the log 2, after it has passed the measuring frame 5, in between the turning device of the turning device 3 comprising four downward arms 4. 10 lS 20 25 00 0 0 0000 000 0 00 0000 0 0 0 000 000 0 0 0 000 000 526 841 : ßsa: fvv. @ ft fi ~ :: f When the turning device has turned the log 2 perpendicular to the desired direction, the log 2 falls down between two guide walls 6 and down to an underlying distributing device 7 comprising at least two or ,s, projecting longitudinal arms 8 with a rounding between the respective arms towards the center of the distributing device 7, where a log 2 can fit. When the log 2 has landed between two protruding arms 8 of the distributing device 7, or just before it has landed, the distributing device 7 begins to rotate a quarter of a turn so as to tip out of the log 2.

The walls 6 can be designed in many different ways, e.g. such as plates, grids, parallel rails or other suitable design. or to the left so as to roll out of the log 2 towards either a transport device for further transport or to be tipped towards a collection point for discarded logs 2, which in one way or another does not hold a certain desired dimension.

If the log 2 is chosen to be rolled off towards the transport device, preferably a cross conveyor 9, they are proposed to be transported to a step feeder 10.

Step feeder 10 is used to one-piece feed logs from a buffer, for example to a kerate web.

This buffer is often a cross conveyor 9 but can also be a timber table. The movable frame in the step feeder 10 rolls with steel wheels on the fixed frame in the step feeder 10. Step feeder 10 is available in many different variants to suit different timber dimensions, lengths and shapes.

From said step feeders 10 the logs can then be transported, via a suitable conveyor to a saw or other suitable sorting or processing device.

An advantage of the present invention is that the distance, between the incoming logs 2 in connection with them passing the turning device 3, can be considerably shortened. The outgoing log 2 leaves the turning device 3 faster than previously known devices, which leads to the incoming logs 2 being transported into the turning device 3 with a shorter mutual distance, without risking colliding with the previous outgoing log 2. 00 00 0000 00 0000 0 A further advantage of the present invention is that it provides an opportunity to directly sort out logs 2 that have been previously incorrectly sorted.

An alternative form of drying is to use a control device, instead of the dry dividing device 7, which can control the logs 2 descending from the turning device 3 either to the left or to the right side. It can be a simple guiding device that can be tilted / steered to the left or alternatively to the right in order in this way to determine in which direction the logs 2 are to be guided.

An alternative embodiment of the dry dividing device 7 is to design it with more or less arms 8 than four, as is preferably used in the present invention. It is also not necessary to find the transition between the projecting longitudinal arms 8 of the tumbling device with a rounding towards its center. The gap is preferably adapted to the shape of a log, which, however, is not necessary for its function.

Claims (1)

1,596,841? PATENT REQUIREMENTS A method for distributing logs at an incoming transport path, wherein a device (3), for turning a log (2), rotates the log (2) in the horizontal plane so that the direction of its longitudinal axis changes 90 ° and falls between two walls (6 ) characterized in that an underlying device (7) distributes the log (2) by the device (7) receiving the log (2), and distributes it to the right or left towards the desired further transport. Device for distributing logs at an incoming transport path, wherein a device (3), for turning a log (2), rotates the log (2) in the horizontal plane so that its longitudinal axis direction changes 90 ° and falls down between two walls (6) characterized in that an underlying device (7) comprises at least one arm (8) which receives the log (2), the arm (8) is arranged from the center of the device (7) and extends along the longitudinal direction of the device (7), and that the device (7) is rotatable to distribute the log (2) to the right or left towards the desired further transport. Device according to claim 2, characterized in that the distributing device (7) comprises at least two arms (8), which are arranged around the center of the device and extend along the longitudinal direction of the device (7) and allow at least one log (2) to space between the arms (8).