FI70679C - FOERFARANDE FOER SORTERING OCH STROELAEGGNING AV SAOGAT VIRKE - Google Patents

Description

1 70679

The present invention relates to a method for sorting and stripping sawn timber, in which method pieces of sawn timber of different dimensions and / or quality are separated from each other and bundle packages are formed from these sorted consignments of sawn timber.

In small and medium-sized sawmills, sorting and stripping of sawn timber is a big problem. The main reason for these problems is due to several simultaneous sawn timber dimensions and grades. In a conventional sawing process, at least two dimensions of sawn timber of different thicknesses are created. Furthermore, there may be several of these pieces of similar thickness in terms of width. When 15 different grades are distinguished from all possible thickness and width variations, dozens of different batches of sawn timber result.

Due to the large price difference, the need to differentiate between different grades has been constantly increasing, and small and medium-sized 2 ° sawmills in particular are seeking to improve their financial performance in this way.

Until now, sorting and stripping have been handled in small and medium-sized sawmills. bet on the table. In this method, the pieces of lumber after the sawing table are fed to a lateral conveyor. The conveyor can be 50 m long. The people next to the draw table each pick their own share of the pieces passing on the conveyor. One person may pick up multiple lumber dimensions and grades.

30 Each quality and dimension is selected into a separate strip package from the selected pieces. In some cases, so-called hard package. This package is later stripped, e.g. in the actual stripper. In the top of the water, sorting can be done well and at the same time the desired batches of sawn timber can be separated. Furthermore, on the leveling table, the sorting does not have to be very accurate, because the sorting can be further refined on the draw table. In this way, 5 leveling tables give a high throughput with one sorter. In addition, there is no need for automation, so the method is inexpensive and reliable in terms of mechanics. Instead, the method requires a large workforce, averaging 10 people. Still taking into account the openings in the walls of the building required for the removal of the finished pa-10 chains, the working conditions of the persons working on the drawbar, especially in winter, are rather deficient. For this reason, there is not even enough labor available for the draw table.

15

In large sawmills, the sawn timber is led to the trays after the leveling table. These trays accommodate the amount of goods required by the finished bar package or part thereof. Different qualities and dimensions can be directed to their own compartments. In this method, large quantities of trays are required. Still, the number of different qualities and dimensions varies greatly, so for a few consignments the compartments are not full at all and there is a risk of spoilage of the sawn timber, especially during the summer. In order to increase the turnover speed of the goods, 25 separate trays are made for medium goods and separately for boards. In this case, the total number of trays increases to 100. The large number of trays requires a lot of construction space and the trays themselves represent a large cost item. Furthermore, the sorting of the goods must be careful and this fact requires a good leveler.

Furthermore, additional thickness and width sensors have to be used to aid sorting. However, under normal circumstances, when about 40 trays are required for ferries, the monitoring of the sorting automation must be continuous, otherwise even large quantities of 3 70679 'may be confused due to automation disturbances. When the trays are emptied, the consignments of sawn timber may continue to interfere with the qualities. When the trays are initially dimensioned for a certain amount of goods, the trays 5 cannot be changed later if, for example, it is desired to change the size of the bar package going to the dryer.

The object of the invention is to provide a method for sorting and stripping sawn timber in the same equipment, which is simple in operation and inexpensive and requires little labor, and is particularly suitable for small and medium-sized sawmills. This is achieved as set out in the appended claims.

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The invention will now be described in more detail with reference to a preferred embodiment of the invention shown in the figure of the accompanying drawing.

Figure 1 schematically shows the apparatus used in the method according to the invention.

In Fig. 1, the sawing leveling table is marked with the reference number 1. From the leveling table 1, the sawn timber pieces 12 are fed individually by a lateral conveyor 13.

On the leveling table 1, the sorter gives the sorted pieces an address on the basis of which the sawn timber pieces 12 pass through the lateral conveyor 2 to the conveyor 3. 30 The conveyor 3 passes the sawn timber 12 on a hook and drops the sawn timber piece 12 into the appropriate tray 5 or drawer table 7 or intermediate storage table 6.

4 70679 1 In the method according to the invention, an attempt has been made to combine the use of a draw table 7 and compartments 5 plus a separate intermediate storage table 6. The purpose is to derive a so-called power quality, i.e. the largest single lumber quality / dimension directly to the intermediate storage conveyor 6. A thick layer of lumber is collected on the intermediate storage conveyor 6, from which it is then led to the stripping machine 11 via an openable door 9.

The next most frequent batches of ta-10 are fed to the trays 5. From the trays 5, the sawn timber passes through the openable base 14 on the lateral conveyor 8 further to the stripping machine 11 via the curling iron 10. Rare lumber required for the most accurate sorting can be directed to the draw table 7.

But due to the small amount of goods, one or two 15 people are enough for this draw table 7. At the end of the draw table 7 there is an openable door 9, against which the so-called power quality. This, in turn, contributes to reducing the drawbar's 7 labor requirements. By opening the door 9, this pull-up table 7 can be so-called. the power quality drives to the stripping machine 11. The pieces picked up from the drawing table-20 can be striped directly in connection with the drawing or transferred to the so-called as a hard package via the lateral conveyor 8 to the stripping machine 11.

Advantages of the method according to the invention include the following advantages of the method: only 4-10 trays are required. This reduces construction and equipment costs. The intermediate storage conveyor 6 can accommodate several strip package blanks, so that they can be striped in a batch run in a series of several packages. This increases the power of the stripping machine 11 and reduces the time required to empty the trays 30. The sorting of the parts requiring great care can be done on the draw table 7, so that the permeability of the actual leveling table can be considered high even with one sorter. The method does not require a complex control system. It is therefore most advantageous to position the draw table 7 35 in the above-mentioned manner, since in this way, for the power quality 5 70679 1 coming to it, it is possible to enable immediate stripping with the same ribbing machine without additional displacements. Furthermore, the length of space required by the conveyor 8 between the log grate and the stripping machine can thus be utilized for both the traction and the intermediate 5 conveyor. Furthermore, thanks to the short conveyors, the change of dimensions does not take much time.

Service and maintenance of the plant is easy. In the case of sawn timber pieces coming through the interim storage-10 table 6, the size of the bundle packages made from these sawn timber pieces can be changed without changes in automation. This increases the flexibility of the plant and thus enables, for example, the use of spacers of different thicknesses (in which case the number of sawn goods in the package changes). If there is a fault in the automation, the sawmill's production can be run via a drawbar.

Claims (3)

70679 6 A method for sorting and ribbing sawn timber, in which transverse sawn timber pieces are transferred to different assembly points 5 and further to the strip for dimensioning and / or quality, characterized in that the largest single dimension or quality of sawn timber is transported to a separate intermediate storage conveyor (6) the most common dimensions and / or qualities of sawn timber are transported on the basis of their dimension and / or quality to 10 different trays known per se (1, 2, 3, 4) and rare and / or pieces of sawn timber required for the most accurate sorting are transported to a drawer known per se (7). carried out by hand, from which pre-sorted consignments of sawn timber from all assembly points (6; 1, 2, 3, 4; 7) are transported to the rimoit-15 (11). 1 Claims 2. A patent according to claim 1, which comprises a carrier conveyor for a carrier (1) account for a transporter (3), for which the first 30 devices are provided on the basis of a dimensional dimension and / or the quality of the carrier 6), i facken (1, 2, 3, 4) eller pä dragbordet (7). Method according to Claim 1, characterized in that the sawn timber is conveyed from the saw blade leveling table (1) to a distribution conveyor (3), from which the individual sawn timber pieces 20 are dropped, depending on their dimension and / or quality, into either intermediate storage conveyor (6), trays (1, 2, 3). , 4) or on the drawbar (7). Method according to Claim 1 or 2, characterized in that the batch of sawn timber on the conveyor (6) acting as an intermediate storage is conveyed via a lifting conveyor (10) to the stripping machine (11). Method according to one of the preceding claims, characterized in that each tray (1, 2, 3, 4) has an openable base (14) and that the consignments of sawn timber assembled in the individual trays are conveyed by a conveyor (8) below the trays and further by a lifting conveyor (10). via to the stripping machine (11). 70679 7 Method according to one of the preceding claims, characterized in that the main dimension or quality separated by the drawbar (7) is conveyed via a lifting conveyor (10) to the stripping machine (t1) and other pieces of lumber 5 picked from the drawbar are stripped directly during towing or transferred as a package by a lateral conveyor (8) (10) to the stripping machine (11). 10 1. For the purpose of sorting and measuring the number of parts, for example, for the purpose of sorting, for the purposes of the three-dimensional dimension and / or the quality of the accounts which were up to the same size as the other parts of the account dimensions of the quality of the conveyor belt and the quality of the conveyor belt (6) and of which of the main conveyor dimension and / or quality of the conveyor are based on the dimension of the dimension of the conveyor (1), 2, 3, 4) 20 or more of a sorting conveyor and / or a sorting conveyor for a conveyor belt account (7) for sorting out of the hand, from a single velvet uplink (6; 1, 2, 4; 7) de färdigt sorterade sägvirkespartierna transporteras tili en ströläggnings-25 apparat (11). 3. A method according to one of claims 1 or 2, which comprises 35 parts according to the invention, in which case a conveyor (6) is conveyed via an elevator (10) to a conveyor (11).