CZ298054B6 - System for mechanical classification of boards or beams - Google Patents

Abstract

In the present invention, there is disclosed a system for mechanical classification of wood boards and beams that are suitable for further processing as laminated wood of boards or beams, wherein boards or beams pass individually and continuously within a production line in longitudinal passage through planing device (102) where planing thereof takes place and subsequently through measuring devices (106, 108) where investigation and classification of the boards or beams according to their strength and/or optical criteria take place, whereby so classified boards or beams are subsequently subjected to mechanical sorting. The production line, there are provided at least two parallel arranged measurement devices (106, 108) for measuring the rigidity of the boards or beams. Prior to the measuring devices (106, 108) there is arranged a branching device (104) for deflecting the boards or beams into either of two branches. Thus, the boards or beams can move slower through the measurement devices (106, 108) 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 planks or beams as an intermediate product for the production of laminated timber from planks or beams, in which, within the production line of planks or beams, a measuring device in which they are analyzed and classified according to their strength and, where appropriate, according to optical criteria, and in which the meshed boards or beams are subsequently mechanically graded and optionally packed on the basis of their classification.

The state of the art

For machine classification of boards and beams with a thickness of preferably 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, for example by X-rays strength or load-bearing capacity and adequately dividing the results into appropriate classification classes. The measurement of the strength of the workpieces can be supplemented with detection software and / or additional software scanners with detection and classification by optical criteria, ie bluishness. bumpers and similar defects. The measured results and / or the classification are applied to the blanks in an optical form, for example in the form of a color code, or electronically stored. In this way, the molded blanks are appropriately sorted and then used to produce 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 facilitates measurement. Planing lines consist of packet separation and feeding to the planing machine, a planing machine and one or more baling machines, often with high-throughput baling machines being pre-loaded with intermediate stock. 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 showed sc. that with increasing speed of semi-finished products the quality of measured results decreases.

Either the planing line speed cannot be optimally used, or the measuring equipment 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 non-classified or poorly classified semi-finished products. Such a semi-finished product) may then be subsequently docked manually, but this again entails higher personnel costs and hence correspondingly increased costs.

SUMMARY OF THE INVENTION

Therefore, it is an object of the present invention to provide a device in which the working speed of the planing line can be best utilized and in which a high quality measurement result can be achieved in the measuring device.

This object is achieved according to the invention essentially in that at least two measuring devices are arranged next to each other in the production line and the boards or beams leaving the planing device sc are alternately supplied to at least two measuring devices, wherein the transport speed at which the boards or beams

V / Z./OU.7- »DO pass through measuring device It is less than the transport speed at which they pass through the planer.

thus, the throughput of the measuring devices can be doubled, in the case of two parallel measuring devices 5, 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. 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 continuous failure time which is still occurring can be eliminated or reduced.

In a preferred further embodiment of the invention, it is envisaged that at least two measuring devices are always the same, which brings additional expense 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. In this case, additional auxiliary containers are saved 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 can be brought together again on a single conveying line to accelerate to a transport speed corresponding to the transport speed by the planer.

A further advantageous arrangement is that the boards or beams of the intermediate storage 11 which are brought together on it and are then fed to the baling device.

Overview of pictures on the blaze

BRIEF DESCRIPTION OF THE DRAWINGS The invention is described in more detail with reference to the accompanying drawing, in which: Figure 1 schematically illustrates a device according to the invention with two parallel measuring devices.

DETAILED DESCRIPTION OF THE INVENTION

The semifinished products, planks or beams not shown in the drawing are also taken from the warehouse (not shown here) and separated in the baling separator 100. The separated semifinished products 40 are then fed individually continuously in the longitudinal passage to the planing machine 102 in which they are planed. The devices 102 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 also known according to the optical criteria is tested. Based on measured results, evaluated by EDV. are adequately classified into multiple classes.

Subsequently, marking devices 110 and 12, respectively, are arranged downstream of the measuring devices 106 and 108, in which they provide a corresponding color code to the semi-finished products 11a, based on the classifications provided in the measuring devices 106 and 108.

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

The marked blanks are then fed together via transport routes 120, 122 to the common transport equipment, transport line 124, based on the classifications established in the metering devices 106 and 108, aligned to individual stages 14 in larger quantities, and then the pick-up device 116 feeds to the high-performance baling device 1 [8]. Finally, the boards or beams are then further processed into laminated wood from boards or beams.

Claims (5)

PATENT CLAIMS A machine for classifying planks or beams as an intermediate for the production of laminated wood from planks or beams, in which, within a production line, planks or beams pass continuously through a planing machine (102) in which they are planed and subsequently 20 a measuring device in which they are analyzed and classified according to their strength and, where appropriate, according to optical criteria, whereby the classified boards or beams are subsequently machine-graded based on their classification, characterized in that they are arranged next to each other at least the two measuring devices (106, 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 at which they pass through the planer. 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 throughput through the planer, n being 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) are in turn common to the conveying speed corresponding to at least the conveying speed by the planer. fits into a single transport line (124). Device according to claim 4, characterized in that the jointly brought boards or beams are stored between them and then fed to the baling device (118).