FI111156B - Skiktare - Google Patents

Description

111156

A stacking

The present invention relates to a stacking apparatus according to the preamble of claim 1.

The feed rates of modern saw lines have increased significantly recently, for example a modern line can survive up to 150 m / min in narrow lumber compared to the previous 80 to 90 m / min. At the same time, the aim is to minimize the damage to the wood material in sawn goods. To accomplish these goals, to sort the middlings, i.e., to sort the lumps of wood of the same height that are taken closest to the core when splitting 10 logs, this is done by a so-called stacking machine that conveys at a time with a conveyor equipped with an exporter for further processing. The conventional stacker receives a bundle of middlings (2-10 boards) which are fed longitudinally to the stacker, which in the next step feeds the logs in a transverse stacking position in which the beams are guided over one edge and slid down the trough to feed the next. In this way, the incoming batches of the middresses are transferred to the single piece feeder for the species-20 without using a lifting device which tends to damage the timber. This conventional stacker is installed for tilting to prevent the log splinters from tipping forward due to gravity, which prevents the stacker from functioning properly. However, the fact that the stacker is mounted for towing is a disadvantage in transporting the timber loads, while the saw machines in front of the stacker are mounted horizontally.

For obvious reasons, such a stacker does not keep up with the increasing feed rate. In the feed strokes nowadays, the time to rotate through the stacker is approximately 1.7 seconds, which means high acceleration and deceleration of the timber. These will fall at such feed rates in conjunction with the general stacker and they will leave the stacker more or less disordered.

The stacker according to the invention, as set forth in the characterizing parts of the claims, provides a secure and controlled feed, while the stacker is in the same plane as the horizontally mounted saws.

2 111156

The invention will be explained in more detail by way of example with reference to the drawing, in which Figure 1 schematically shows a side view of a stacking device according to the invention and Figure 2 schematically shows a top part of a stacking device.

In Fig. 1, reference numeral 1 denotes a body supporting a plurality of width-mounted stacking devices (see Fig. 2) for receiving medium bores. Corresponding stackers comprise a flexible member 3 provided with a carrier 2 which is actuated and passed through a pair of folding rollers 4. For example, the flexible member may be a chain. Reference numeral 5 denotes a slider-10 surface or conveyor roll. Reference numeral 6 denotes a tinplate and reference numeral 7 a conveyor for transporting logs for sorting.

FIG. The middle slides slide with the support member 5 to a stop (not shown in Fig. 2) not shown. Mounted on the bracket 9, viewed from the feed direction, is a somewhat downwardly facing counter member 10, which is suitably marked at 11 and is movable vertically. In the starting position shown in Fig. 1, the counter member 20 10 is in the feed direction against the upper edge of the forward log bar. In the movement of the retractor, the batch of logs will press the counter member 10 to move upward, either against its own weight or against an external force applied thereto, which means that the batch of logs is braked, whereby the braking force can be determined by the counter member 10. The counter member prevents the logs 8 from overturning when both the flexible member 3 and thus the introducer 2 are accelerated at start-up and then decelerated as the middle tabs 8 approach the stacking station 12, where the logs one by one slip downward the hopper 6 and down to be on the conveyor 7 for processing the slats 30 to 30. When the "last" log grapple is delivered through the tipping damper 6, the counter member 10 is in its upper position, while a new pack of middlings is fed to the stacker. When the last log bar is released, the counter element 10 is lowered and the process is repeated.

Depending on the velocities used, i.e. the g-forces present, it is possible, as mentioned, that the counter member 10 only needs a dead weight 3111156 to be "forward" against the loggerhead. However, at high speeds and thus with high acceleration and deceleration forces present, it is necessary to provide a controlled counter force from the member 10.

In order to prevent the inlets of the middle males from colliding with the feeder 5 2 in said feed station, the stacker is provided with a guide arm 13 associated with corresponding stackers. This guide arm misdirects or inclines the incoming lumber malfunctions past the respective conveyor 2 and thus prevents malfunction.

The steering arm 13 is articulated to the body. In the joint 14, the oh-10 divider arm 13 is actuated by a torsion spring which, viewed in the direction of Fig. 2, tends to rotate the steering arm 13 anticlockwise. When the introducer 2 takes the inward feeding position, the entrant will grab the free end of the guide arm 13 and thereby carry it, thus rotating the steering arm 13 clockwise. In the feed movement, the guide arm 13 snaps out of the -15 exporter to press against the buffer 15. Through this arrangement, it is ensured that the guide arm 13 in the feed position always takes the correct guide position for the log dogs in relation to the exporter 2.

The stacker according to the invention is able to operate with high reliability at the strokes required by modern high-yielding saw lines, while the stacker can be mounted horizontally, which eliminates interruptions in the feeding of logs at high speed to the stacker.

Within the scope of the invention, it is possible to form a counter element in a manner other than that described and illustrated, e.g., the counter element may, instead of the one shown, be vertically pivotally mounted at an "upstream" end.

Claims (6)

1. Layers to which a number of adjacent pieces of wood (8) are advanced in the longitudinal direction and which together form a layer on the layer in the transverse direction of the pieces of wood standing on the upper edge of a carrier (2) is moved to a stacked ( 6), where the pieces of wood in the layer one by one slides down on a further handling of a conveyor (7), characterized in that a countermeasure member (10) is arranged which engages with the wood piece in the direction of movement of the front. 2. A layer according to claim 1, characterized in that the countertop member (10) engages with the upper edge of the wood piece. 3. A layer according to claim 1 or 2, characterized in that the countertop member (10) is in the form of a vertically movable beam supported by the layer formed over the layer. 4. A layer according to claim 3, characterized in that the boom 15 of self-weight abuts on the piece of wood concerned. 5. A layer according to claim 3, characterized in that the boom with adapted force from an external power source (11) abuts on the piece of wood concerned. 6. A layer according to any one of claims 2-5, characterized in that the boom is arranged inclined downward in the direction of movement seen.