CZ20031527A3 - Device for mechanical classification of boards or balks - Google Patents

Abstract

Plant for machine classification of wood boards and beams that are suitable for further processing as laminated wood. The plant has two parallel arranged measurement instruments (106, 108) for measuring the rigidity of the boards. Prior to the instruments is a branching device for deflecting the boards into either of two branches. Thus the boards can move slower through the measurement sections than through the planing device (102).

Description

Equipment for the mechanical classification of boards or beams

Technical field

BACKGROUND OF THE INVENTION The present invention relates to an apparatus for the mechanical classification of planks or beams as an intermediate for the production of laminated timber from planks or beams, in which, within the production line, planks or beams are individually fed continuously in a longitudinal pass. equipment in which, in terms of their strength and, where appropriate, optical criteria, they are analyzed and classified, and in which the classified boards or beams are subsequently mechanically graded and optionally packed on the basis of their classification.

BACKGROUND OF THE INVENTION

For machine classification of boards and beams with a thickness of mainly 30 to 90 mm, a width of especially 80 to 280 mm and a length of preferably 2.5 to 6 m, measuring devices are used which check individual blanks (boards and beams) in the longitudinal passage by X-rays strength and / or load capacity, and adequately dividing the results into appropriate classification classes. The measurement of the strength of semi-finished products can be supplemented with additional software or with additional software scanners with detection and classification by optical criteria (bluishness, bumps and similar defects). The measured results or classification are applied to the workpieces in an optical form, for example in the form of a color code, or electronically stored. The blanks thus classified are appropriately sorted and then used for the production of laminated wood from planks or beams.

Such measuring devices are integrated into normal planing lines. Planing ensures calibration of planks with defined maximum cross-sections, which makes measurement easier. Planing lines consist of packet separation and π π π π π π π π π π π π π π π π π π π π π π Feeding into the planing machine, further from the planing machine and one or more baling machines, often with intermediate intermediate storages being often preceded by a high-performance baling machine. Planing lines often have much higher maximum working speeds than measuring equipment. Therefore, high working speeds of planing lines are often not used.

In order to increase the working speed of the whole device, it is fundamentally possible to further increase the working speed of the measuring device. However, it has been shown that as the speed of the blanks increases, the quality of the measured results decreases.

Either the planing line speed cannot be optimally utilized or the measuring equipment has to work so fast that the quality of the measured results decreases. The decrease in the quality of the measured results, in turn, results in a relatively high proportion of non-classified or poorly classified semi-finished products. Such semi-finished products can then be subsequently manually classified, but this again entails higher personnel costs and therefore correspondingly increased costs.

Therefore, it is an object of the present invention to provide a device in which the working speed of the planing line can be used to the best of its own advantage and in which measured results of high quality can be achieved in the measuring device.

SUMMARY OF THE INVENTION

According to the invention, this object is essentially achieved by arranging at least two measuring devices side-by-side in the production line, and the boards or beams leaving the planing device are alternately fed to at least two measuring devices, the conveying speed at which the boards or beams passing through the measuring device is less than the conveying speed at which they pass through the planer.

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In this way, the throughput of the measuring devices can be doubled (in the case of two parallel measuring devices) and the working speed of the entire device can be increased accordingly. At the same time, due to the fact that the blanks can now pass through the individual measuring devices substantially slower, the quality of the measured results is noticeably improved. A further advantage of the solution according to the invention is that, in the event of failure of one of the measuring devices, the device can now in any case be operated at half the capacity, thereby eliminating or reducing the continuously occurring failure times.

In a preferred further embodiment of the invention, it is envisaged that at least two measuring devices are always the same, which brings additional cost and operating advantages.

Furthermore, it is advantageous if the transport speed in the measuring devices is adapted to the transport speed of the planer so that the throughput of each measuring device is equal to 1 / n of the throughput of the planer, n being equal to the number of parallel connected measuring devices. This saves additional auxiliary containers and the blanks leaving the planer can be fed directly to the measuring devices.

Furthermore, it is advantageously provided that the boards or beams leaving at least two measuring devices are in turn brought together on a single conveying line, when accelerating to a transport speed corresponding to the transport speed by the planer.

Further advantageous features of the invention are apparent from the other dependent claims and from the following description.

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BRIEF DESCRIPTION OF THE DRAWINGS FIG

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The invention will now be described, by way of example, with reference to the accompanying drawing, in which: FIG.

DETAILED DESCRIPTION OF THE INVENTION

The semi-finished products (boards or beams) not shown here are taken from a warehouse not shown here and separated in the baling separator 100. The separated semi-finished products are then individually fed continuously in the longitudinal passage to the planer 102 in which they are planed. The workpieces leaving the planer are alternately fed via a branch 104 to one measuring device 106 and the other measuring device 108, through which they pass at a greatly reduced speed.

In the measuring devices 106 and 108, the blanks are measured in their known manner by means of X-ray technology for their strength. Furthermore, the laser scanning technology known in the art is also tested according to optical criteria. Based on the measured results, evaluated by EDV, they are adequately classified into several classes.

Subsequently, marking devices 110 and 112 are arranged downstream of the measuring devices 106 and 108, in which the semi-finished products are provided with the corresponding color code on the basis of the classifications established in the measuring devices.

Markings for the relevant classification may be placed on the side. Markings of defective spots can also be placed on the boards, so that they can then be cut out later by means of the respective trimming saws.

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The marked blanks are then fed together via conveying lines 120, 122 to the common conveying device 124, based on the classifications established in the metering devices, equalized into individual trays 114 into larger quantities, and then conveyed to the high-performance baling device 118 Finally, the boards or beams are then further processed into laminated wood from boards or beams.

Claims (5)

An apparatus for mechanically classifying planks or an intermediate product for the production of laminated wood from planks or beams, in which, within the production line, planks or beams pass continuously through the planing machine (102) in which they are planed and subsequently measuring, in which are classified and classified according to their classification in terms of their strength and possibly also according to optical criteria, whereby the classified boards or beams are subsequently machine-graded, characterized in that at least two measuring devices (106, 108) are arranged side by side in the production line ), and the boards or beams leaving the planing device (102) are alternately fed via a branch (104) to at least two measuring devices, wherein the transport speed at which the boards or beams pass through the measuring device (106, 108) is less than the transporting the speed with which they go through it blovací zařízení. Device according to claim 1, characterized in that at least two measuring devices (106, 108) are the same. Device according to claim 1 or 2, characterized in that the transport speed in the measuring devices (106, 108) is so adapted to the transport speed in the planer (102) that the throughput of each measuring device is equal to 1 / n of the throughput of the planer. where n is equal to the number of measuring devices arranged in parallel. Apparatus according to one of the preceding claims, characterized in that the boards or beams leaving at least two measuring devices (106, 108) can be brought together again into a single joint, after accelerating to a transport speed corresponding to at least the transport speed by the planer. transport lines (124). ·························· Device according to claim 4, characterized in that the jointed boards or beams are interim stored and then fed to the baling device (118).