SK6742003A3 - Equipment for machine classifying of planks or beams - 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

Technical field

BACKGROUND OF THE INVENTION The present invention relates to an apparatus for the mechanical classification of boards or beams as an intermediate for the production of laminated wood from boards or beams, in which slabs or beams are continuously fed individually in a longitudinal passage into a planing machine in which they are planed. equipment in which, in terms of their strength and, where appropriate, in accordance with optical criteria, they are analyzed and classified, and in which the classified boards or beams are subsequently machine-graded and, where appropriate, packaged.

BACKGROUND OF THE INVENTION

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

Such measuring devices are integrated into normal planing lines. Planing ensures calibration of boards with defined maximum cross-sections, which facilitates measurement. Planing lines consist of packet separation and feeding to a planing machine, a planing machine and one or more baling machines, often with intermediate intermediate stacking being often high-performance baling equipment. Planing lines often have much higher working speeds than measuring equipment. Therefore, the high working speed of planing lines is therefore often not used.

In order to increase the working speed of the whole device, it is in principle 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 during the measurement.

Thus, either the speed of the planing line cannot be optimally utilized or the measuring device must operate 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 unclassified or poorly classified semi-finished products. Although such semi-finished products can then be manually classified subsequently, this again entails higher personnel costs and therefore correspondingly increased expenditure.

It is therefore 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 possible degree and in which, on the one hand, the measured results can be achieved with high quality.

SUMMARY OF THE INVENTION

This object is achieved according to the invention essentially in that at least two measuring devices are arranged side by side in the production line, and the boards or beams leaving the planing device are alternately supplied to at least two measuring devices, wherein the transport speed at which the plates or beams passing through the measuring device is less than the transport speed with which they pass through the planer.

In this way, the throughput by the measuring devices can be doubled (in the case of two parallel measuring devices) and the working speed of the whole device can be adequately increased. 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 greatly 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, whereby the constantly recurring failure times can be eliminated or reduced.

In a preferred further embodiment of the invention, it is envisaged that at least two metering devices are always the same, providing additional expense and operating advantages.

Furthermore, it is advantageous if the conveying speed in the measuring devices is adapted to the conveying 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 measuring devices connected in parallel. In this case, additional auxiliary containers and semi-finished products leaving the planing device 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, after being accelerated to a conveying speed corresponding to the conveying speed by the planering devices, again jointly coupled to a single conveying line.

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

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is described and explained in more detail with reference to the accompanying drawing, in which: FIG. schematically shows a device according to the invention with two parallel measuring devices.

DETAILED DESCRIPTION OF THE INVENTION

The semi-finished products (plates or beams) not shown here are removed from the warehouse (not shown here) and separated in the baling separating device 100. The separated semi-finished products are then individually fed continuously in a longitudinal passage to the planing machine 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 highly reduced speed.

In the measuring devices 106 and 108, the blanks themselves are measured in their known manner by means of X-ray technology to their strength. In addition, they are tested according to optical criteria using the laser scanning technology also known. 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, on the basis of the classifications provided in the measuring devices, are provided with an appropriate color code.

The 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.

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

Claims (4)

An apparatus for machine classifying slabs or beams as an intermediate for the production of laminated timber from slabs or beams, in which, within a production line, slabs or beams pass continuously through a planing device (102) in which they are planed and subsequently a measuring device in which, in terms of their strength and, where appropriate, optical criteria, they are analyzed and classified, whereby the classified boards or beams are subsequently machine-classified according to their classification, characterized in that at least two measuring devices (106) are arranged side by side in the production line. , 108), and the boards or beams leaving the planing device (102) are alternately fed via a branch (104) to at least two measuring devices, the transport speed at which the boards or beams pass through the measuring device (106, 108) is less than the transport speed with which the planes go cím 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 conveying speed in the measuring devices (106, 108) is so adapted to the conveying 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), after being accelerated to a conveying speed which at least guides the conveying speed by the planer, can be brought back into a single the transport line (124).