RU2341436C1 - Automated timber grading line of sliding-roller type with additional sections with double-sided discharging - Google Patents

Abstract

FIELD: transport; construction.

SUBSTANCE: automated line for timber grading contains control panel, classifying table with sliding distribution mechanism and reverse conveyor segregated in width by partitions into corridors being prolongation of corridors on classifying table, devices discharging timber in end of projection conveyor corridors and in plane of stepped storage containers. Line is amended by sections of additional conveyors securing two-side discharging of timber into storage containers. Said sections are installed at ends of central corridors of projection grading conveyors.

EFFECT: simplification of line construction with increase of fractional yield on one timber grading work place.

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Description

The invention relates to the woodworking industry and can be used to create mechanisms designed for the mechanization of sorting of lumber at sawmills and woodworking enterprises, with small and medium production volumes.

Currently, large sawmills use automated sorting lines of domestic and foreign production for the sorting of sawn timber with the transverse movement of the boards by sorting conveyors. These lines have high performance (up to 40 or more boards per minute), but are bulky (weight from 60 tons or more), and expensive. When using them, the formation of drying stacks or transport bags directly in the line stores is practically impossible, therefore, packs of boards obtained during sorting must first be removed from the sorting zone and then transported for subsequent transfer with the formation of drying stacks or transport packages, their description and characteristics are given in the sources (Shimkevich Yu.B. Handbook on lumbering. St. Petersburg, ProfiKS, 2003, 195 pp., Silaev V.I. Mechanization of work in warehouses of lumber. Moscow. “Lesn I industry ". 1980. 123 pp.) (1 analogue).

In sawmills with medium and small volumes of production, as a rule, “sorted areas” (transverse 4-5 chain conveyors) with manual sorting of boards are used. The labor costs for sorting with their use make up from a quarter to half the labor costs of the entire sawmill. It is impossible to form drying stacks and transport packages at the sorting sites as well as the mentioned automated sorting lines without turning or transporting and re-shifting lumber, which significantly reduces labor productivity in enterprises.

In connection with the foregoing, the problem arose of creating for enterprises of small and medium-sized lumber production inexpensive automated sorting lines with the longitudinal movement of the boards, since manual labor on sorting is excluded on such lines, and drying stacks and transport packages can be formed directly near the line, without re-shifting the boards , which also provides a reduction in manual unproductive labor.

Known sorting line with the longitudinal movement of lumber for small sawmills (Zanegin L.A. and others. Line for sorting lumber and beams. Woodworking industry, 2003, No. 4, 7, 8).

The line includes a longitudinal roller conveyor with extendable stops and transverse chain conveyors with pushers for dumping boards into drives located on both sides of the roller conveyor. The need to install transverse conveyors against each pair of drives and retractable stops complicates and increases the cost of the sorting line. The line capacity is 5-6 boards per minute, which is not enough with average production volumes (analogue 2).

It is also known sorting device (Silaev V.I. Mechanization of work in the warehouses of lumber. Moscow. "Forestry". 1980, 21, 22), made in the form of slide valves that are inclined in one line. Controlled gate valves form a ramp along which the boards, when the shutters are opened, fall onto the remote conveyor belts and are transported through them to drives. Such a switchgear is simple in design and reliable, but can only service a limited number of drives, usually up to four (analog 3).

A well-known board drive ND-2 (Shimkevich Yu.B. Handbook on sawmilling. St. Petersburg, ProfiKS, 2003, 195 p.), The design of which includes rollers with screw winding and angled stops (boards) for dumping lumber into drives , this device is used only as a drive for boards (analogue 4).

Known (patent for utility model No. 56358 with priority dated January 26, 2006, article Reutova Yu.M. Solution of the problem of sorting lumber at medium and small sawmills. "Woodworking industry", 5/2006, pp. 8-11) automated line for sorting of lumber, containing a control panel, slide gates, remote sorting conveyors, separated by width by partitions into corridors, dumping devices, characterized in that the slanted gates are combined with a drive reversing the nweyer, divided by partitions into the corridors, forms a sorting table, which, on command from the control panel, provides the boards to the external sorting conveyors located on both sides of the sorting table, while the corridors of the external sorting conveyors are a continuation of the corridors of the sorting table (analogue 5), selected as a prototype . According to the applicant, the closest technical solution for the combination of matching features and the technical result achieved is the automated line for sorting lumber, utility model patent No. 56358 (analogue 5), which is selected as a prototype. The disadvantage of this (prototype) technical solution is that each corridor of the sorting table provides sorting of lumber into two drives. For example, four corridors - 8 drives (sorting fractionality 8). A technical solution is proposed for a line for sorting lumber, providing an increase in the fractionation of sorting due to one additional sorting corridor, not by 2, but by 4 units.

For example, supplementing the four-corridor line with another, fifth, corridor, using the proposed technical solution, we get a sorting line with sorting fractionality 12, not 10, as would be the case with the prototype.

This is achieved by the fact that the automated line for sorting lumber, containing a control panel, a sorting table with a sliding gate mechanism and a reversing conveyor, divided by the width of the partitions into corridors, remote sorting conveyors with corridors that are a continuation of the sorting table corridors, dumping devices containing installed under angle stops and rollers with screw-wound winding, as well as lumber drives staggered in plan, equipped with additional sections tional conveyors which are mounted at the ends remote central corridors sorting conveyors, with their tilt to one side and the other to reset them with lumber.

The claimed technical solution is illustrated by the drawings: in Fig. 1 is a schematic diagram of a sorting line, in Fig. 2 is a cross section of a line along AA, in Fig. 3 is a side view of a section of an additional drive conveyor, and in Fig. 4 is a cross section of a section along B -B.

Boards 1 to the line are fed by a transverse conveyor 2. An automated line for sorting lumber contains a control panel 3, a sorting table with a sliding gate mechanism 4 with slide gates and a reversing conveyor 5, divided by the width of the walls 6 into corridors 7, and remote drive conveyors 8, divided along the width of the walls 9, forming corridors 10 for directing the boards to the place of discharge into the drives 11 (12) and sections 13 of additional conveyors with two-sided discharge of lumber. Moreover, the corridors 10 of conveyors 8 are a continuation of the corridors 7 of the sorting table.

At the end of each corridor 10 there are shields 14 installed at an angle of more than 90 ° to the longitudinal axis of the conveyor, while on the rollers 15 of the remote conveyors 8 located in the places where the boards 1 are discharged into the drives 11, 12, screw winding is made. On sections 13 there are spring-loaded stops 16 with microswitches located at right angles to the longitudinal axis of the sections 17. The lumber is discharged from the additional sections by forcing the section to the opposite direction (gravity discharge), as shown in Fig. 4, or by any other method .

The drive of the conveyors of sections 13 is preferable from the remote conveyors 8 through any transmission, their autonomous drive is not excluded.

Storage devices for boards can be in the form of templates 12 or receiving tables 11. In the first case, the formation of drying stacks or transport packages is assumed in a special automated packaging (stacking) device (not included in the line), - in the second 18 directly at the line.

Automated line operates as follows.

The operator includes a cross conveyor 2, right, left remote conveyors 8 and sections 13. On the feed conveyor 2, boards 1 are located at the pushers and at regular intervals are fed to the sorting line, while the movement speeds of the feed 2 and sorting conveyors 5, 8 should be synchronized.

The operator visually evaluates the board (its size, quality, grade, wood species), presses the corresponding button on the control panel 3, while the corresponding gate rises on the switchgear and the reverse conveyor 5 is turned on in the desired direction. The boards through the window of the raised gates fall into the corresponding corridor of the sorting table 5 and move with the rollers to the end of the corridor 8, where they abut against the shield 14 mounted at an angle, and by means of screw winding made on the rollers 15 are dumped into the drive 12 or onto the receiving table 11.

To address lumber to drives, additional sections require a more complex addressing system. One of the possible options may be a “pre-order” from the control panel with the actuation of the resetting devices from the end switch 17 when the end of the board hits the stop 16.

Further, with significant volumes of lumber production (30-40 thousand m ³ per year) and the presence of an automated device in the complete set of the sawmill for forming drying stacks (transport packages), a bundle of lumber from the template (drive 12) is transported by this truck to this device for drying stacks, and in the absence of such a stacking device, drying stacks 18 and transport packages are formed by two workers directly near the sorting line.

The technical result of the claimed technical solution is to simplify the design, reduce the metal consumption and manufacturing cost of the sorting line in terms of one sorting place (drive).

The claimed technical result is achieved by installing at the ends of the central corridors of the external sorting conveyors sections of additional conveyors with two-sided discharge of lumber from them into the drives.

Using the proposed technical solution, sorting lines with sorting fractionality from 8 to 20 can be manufactured.

The claimed technical solution can be implemented in industry using standard equipment, non-deficient materials and components in any domestic enterprises of timber industry engineering.

Claims (1)

An automated line for sorting lumber, containing a control panel, a sorting table with a sliding gate mechanism and a reversing conveyor divided by the width of the partitions into corridors, remote sorting conveyors with corridors that are a continuation of the corridors of the sorting table, dumping devices containing angled stops and rollers with screw winding, as well as lumber drives staggered in plan, characterized in that the line is equipped with sections for additionally conveyors which are mounted at the ends remote central corridors sorting conveyors, with their tilt to one side and the other to reset them with lumber.

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