FI118845B - Device at timber compartment - Google Patents

Description

118845

Device in connection with the timber drawer Anordning vid eilesfack 5

The present invention relates to a device according to the preamble of claim 1 in connection with a timber compartment.

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Sawn timber sorting plants use sorting trays, which are usually so-called "drop-in" trays; to collect pieces of wood of the same dimensions and / or quality in one single compartment. Once a predetermined number of pieces of wood have been collected in the same compartment, it is emptied for further transport of the pieces of wood for subsequent treatment, for example, for stapling.

The sorting plant consists of several successive trays, which are fed from above by the pieces of wood intended for each tray. The drop-down compartment is made up of 20 · mainly · vertical support beams that define the sides of the compartment.

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• The V soles are movable in the vertical joint. The protruding bottoms are located at the same level in each ··· compartment and together form the base of the wood pieces when they are · · *. * ϊ is inserted into the tray. When it is full or when a predetermined number of pieces of wood are ··· • · · 1 * collected in the tray, the bottom drops and, because they are at the bottom of the tray, the pieces of wood # ·· * r * * * * * for carriage. The logs are moved forward and past the drop compartment normally by means of a sorting conveyor with hanging, open hanger hooks, where the wood pieces are transported and at the right • · a · 7 pull with a demounting hook to drop down into the * ... * compartment below.

30 V * Swedish patents 8500684-9, 9404139-9 and 9604185-0 are disclosed ·· »· ... · to illustrate examples of such prior art.

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In woodworking of saws, the general requirement is to reduce the passage time or pace of wood pieces through the sawmill, i. to increase transport speeds during different processing stages. For example, in order to increase the feed rate to 200, e.g. at about 3 m / s, it is no longer possible to use sorting conveyors with carrier 5 hooks in a sorting plant. At these speeds, the risk of malfunction becomes high. Instead, the logs are transported forward in the sorting compartment with the logs in the conveying direction at the level of the intermediate conveyor catcher behind the logs, which also entails the transport of the swath also at high speeds.

However, this includes that high speed wood pieces are ejected horizontally at high speed against the downstream side of the tray in the transport direction.

The object of the invention is thus to make the sorting of the wood in the drop boxes 15 at high speeds safe and not to cause any damage to the wood pieces during handling. This can be accomplished by the features set forth in the claims of the invention.

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The invention will be described, by way of example, with reference to the drawing which illustrates • a] ··! 20 is a side elevational view of a sorting plant with a sorting bin.

• ^ *, ·,: In the same context, reference is made to the aforementioned Swedish patent publications.

• · · • · ·· * • * · • · · »*: *. The sorting plant is basically made up of a frame 1 (partially undrawn) and vertically downwardly supporting brackets 2 defining 25 drop trays 3. Each drop tray 3 has a bottom part 4 which can be lowered: 1 · and raised in the tray. Each base member 4 can be supported by guides that are: ···. in brackets 2, and driven by a hydraulic cylinder. This means that the • ♦ ··· sorting plant itself, consisting of a frame 1, brackets 2 and wide compartments 3, is constructed .j. the beams and what the bottom parts consist of consoles which together form the bottom of the compartment and support the wooden blocks 5 lowered into the compartment 3. The sorting conveyor 6 is formed above the compartment in the direction of the arrows P, e.g. running around the traction sheave and the 118845 3 pivoting wheel (not shown), which, at a certain distance, carry catchers 7 which each feed a piece of wood by pushing it onto a forward transport plane formed by the pivoting flaps 9, as shown in the figure.

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The pieces of wood 5 (only one shown) are transported at high speed, about 3 m / s (200 strokes) to a sorting plant. When a piece of wood 5, classified by size and / or quality, enters the upstream position of the tray to receive this quality, the flap 9 in the tray pivots about its pivot axis 8 so that the flap captures the wood and guides it down into the tray. indicated by an arrow Pi. As can be seen from the drawing, the closed flaps form the transport plane of the sorting plant to the pieces of wood up to the open flap.

Seen in the transport direction, on the downstream side of the compartment, at its upper end 15, as shown in the figure, is a damping member consisting of a uniform or divided compartment-wide fabric member 10 which is attached to hang freely down the compartment.

The height of the fabric member, i.e. the distance from the bottom to the top can be, for example, between ... 30-100 cm. When a fast moving piece of wood 5 hits the top of the fabric member 10, • · «·.! '! Immediately suppresses the horizontal movement of a piece of wood due to the flexibility of the fabric member • * · 20, which also causes the piece of wood to fall more or, ·. ; in a less circular motion, substantially vertically down onto the base member 4.

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To prevent the fabric web from "fumbling" too uncontrollably when the stream of wood is fed into the compartment and hits the fabric selector, with the risk that the wood pieces m come too loose in compartment 3, the fabric web 10 may be stiffened at its bottom or by any other suitable means. The fabric member 10 thus stops substantially any piece of wood. 5 motion components in the horizontal direction, causing the piece of wood to fall ··· * mainly straight down into the compartment, arrow P2, which is very gentle given the high output speed of the piece of wood.

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When tray 3 is filled with pieces of wood or when a predetermined number of pieces of wood fall into the tray, the bottom part 4 lowers and swivels from the front so that the pieces of wood 304 118845 can be emptied in a known manner for the downstream conveyor (not shown).

Here is illustrated by way of example a damping member consisting of a fabric member 5, which may be formed of a single piece extending across compartment 3, but which may also be divided into a plurality of parts. The fabric web may consist of reinforced or unreinforced fabric, rubber, plastic or other suitable material. Of course, the term "fabric member" here does not strictly refer to foil or fabric, but also includes metal mesh, hanging chains, etc. The damping member may also form a plurality of dependent piston-type dampers within the scope of the invention.

The lower edge of the fabric member 10 can also be secured to the bounding bracket 2 at such a height that the fabric member still hangs vertically about 30-100 cm, as shown by the dashed line in the left compartment 3 of Fig. 3.

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Claims (8)

An arrangement for timber compartments of sorting plants in the form of vertical sink compartments (3), in which folding pieces (5) are transversely transposed one above the compartments by means of a conveyor (6) and timber pieces of the same category are delivered and collected in the same compartment, whereby respectively. Trays on the sides are defined by vertical bearings (2) and are provided with a vertically movable tray bottom (4), which when the tray is filled with pieces of wood, delivers them to a remote conveyor under the tray for further handling, characterized in that it is at the top, across it. side of the respective compartments, located downstream in the transport direction of the wood bits 10, are provided one or more suspended damper means (10), which dampens the movement component of the wood bits (5) in a horizontal direction. 2. Device according to claim 1, characterized in that the damper (10) is arranged to hang freely. 15 Device according to claim 1 or 2, characterized in that the damping means is in the form of a cloth (10). • · • · ·· # • V. Device according to claim 1,2 or 3, characterized in that the cloth means (10) along * a · ·, ···. The lower edge is provided with one or more depressing and stiffening members (11, 12). • · • · · Device according to any of the preceding claims, characterized in that the cloth (10) consists of textiles, rubber, plastics or the like. ! 25 Apparatus according to any of the preceding claims, characterized in that the cloth member · (10) has a height of between about 30-100 cm. ··· ·: · *: 7. Device according to any of the preceding claims, characterized in that the piece of wood. (5) is arranged to be delivered from the conveyor (6) to the compartment (3) in substantially horizontal position. 30 direction. · »· 118845 s Device according to any of the preceding claims, characterized in that Tray (3) at the top is provided with a pivotable flap (9), which in closed position forms part of the conveyor plan's transport plan for the wood bits (5) and which (9) in a raised position forms an opening for the wood bit (5) insertion into the tray (3). ). 5 * ·· • · · · ··· MI • · · • «• · * ·« • · · · ··· • · · · · · · · t ··· • * · • ♦ · · • · · · M • M M M M M M M M M M M M M M M M M M M M M *