FI110770B - Device for sepg. single pieces from timber packet - has packet hoist holding uppermost timber layer at specific level before layer removed, and vacuum lifting device incorporating frame supporting suction plane - Google Patents

Abstract

The device has a packet hoist (6) holding the uppermost timber layer at a predetermined level before the layer is removed and after its removal the packet (2) is raised so that the next uppermost layer is located at the predetermined level. Removal of the uppermost timber layer is by a vacuum lifting device (21) incorporating a frame supporting a suction plane. The vacuum lifting device frame is movable between a first position where the suction plane is located on the timber packet upper side and a second position where the suction plane is located above the feed-in end of a first cross transporter (5). In the transport direction after the first cross transporter is a second cross transporter (22) downstream of which is a device (23) where the timber pieces are individually sepd.

Description

5,110,770

Procedure and apparatus for dividing timber into one piece - Förfarande och anordning för att en-styckeuppdela viirstycken i et vorespaket

The present invention relates to a method and apparatus for dividing a log of timber into one piece.

In sawmills and other timber processing plants 10, in some operations, the timber placed in the package comes to the point of entry, where the timber has to be divided into pieces in order to be individually processed. The timber package consists of a plurality of layers of timber pieces in which the layers are either directly overlapped or separated by layers. Examples of such entry points include a control room, a middleman and a planer.

The usual conventional procedure for removing a layer of timber is to place the package of timber on a tilt elevator that is inclined against the horizontal. The package is resting against the horizontal with some of the tiltable lifting and lowering beams. As the bottom of the elevator is raised to a level where the top layer of timber is above the top of the beams, the top layer of timber slides down from the • '·· layer below to the sliding conveyor i · and the horizontal transverse conveyor.

• · · • · * • · · ·

The intention is that the logs in one layer of wood »30 will remain in order and remain transverse. . when sliding on a conveyor, relatively parallel to each other. However, it is common, especially for smaller wood · · * '· * "racks, to overlap: cross and tangle with each other.

35 '. As a result, there is a n.s. elevators comprising unloaded conveyors that lift one piece of timber 2 110770 pieces at a time. In this way, a layer of adjacent pieces of wood is recreated and then divided into one piece.

5 It is thus the case that, for example, the timber entering the control room is arranged in a package. Timber arriving in the pockets immediately before the elevators will be in complete disarray after the division of the packet to form a single layer of timber thereafter with the aid of the elevators.

The elevators damage the edges of the timber pieces by removing parts from the edges of the timber pieces. Still, elevators with high production capacities represent power constraints. It is difficult to make gesture monitors, especially with smaller timber dimensions, to operate at high power. In addition, elevators are a great source of noise.

20 Thus, for a very long time, there has been a desire to remove the gesture and to keep the timber in the timber packages in order.

For example, mediation between pieces of wood is known. ; ; 25 when using, keep the timber upright and '. _ lifting the top layer of timber pieces with a vacuum lifter with a plurality of suction cups transverse conveyor *. position above the men where they are lowered.

It could be possible to use vacuum lifting technology to • lay the wooden pallet directly on the transverse conveyor, thus avoiding the need for elevators for: arranging the timber pieces.

. ·,; However, elevators do not only act as organizers of lumber bins, but elevator pockets are used. bridging interruptions in timber transport in package * · '* · exchanges. From the moment the last layer of timber in the packet has slipped off the packet elevator up to 3,101,770 until the top layer of the next timber packet slides off, it takes about a minute. The decontamination time varies depending on the size of the timber, but can be said to be between 5 and 15 minutes. This means that, especially with larger timber dimensions, packet changeover time constitutes a significant portion of the available time. During this time, however, the logs must be transported to downstream compartments of the plant at all times.

However, the present invention solves the elevator problem with a solution that eliminates them.

The present invention thus also relates to a method of individually dispensing timber in a lumber packet, wherein the lumber 15 layers are successively removed from the lumber packet, whereupon the lumber of one lumber is disposed in a single piece and characterized in that the lumber pack is carried an upper timber layer in a predetermined level before the layer is removed, and each packet elevator is subjected, after one layer removal, to lift the packet such that the upper layer is substantially at a predetermined level so that the upper timber layer / ··· is removed by a vacuum lifting device, which::: 25 includes a frame comprising an absorbent suction plane adhering to a single layer of lumber pieces, the frame being movable in a first position in which the suction plane is disposed • *; t ·, above the lumber pack, and between the second position, • * * where the suction plane is located above the first transverse feeder end of the transverse conveyor, so that in the transport direction downstream of the first transverse conveyor there is a second transverse conveyor comprising after the timber is processed, ·, *. further, that in addition to the first transverse conveyor there is ....: 35 a third transverse conveyor forming the buffer and. that the lumber is made from the first transverse conveyor— '·' · us optionally fed to the second or third transverse conveyor, and that the lumber on the third transverse conveyor 4 110770 is selectively fed to the second transverse conveyor.

The invention further relates to such apparatus having the particular features set forth in claim 6.

The invention will be described below with reference to the partially exemplified embodiment in which: - Figure 1 illustrates a first embodiment of the device according to the invention seen from the side, - Figure 2 illustrates a second embodiment of the device according to the invention Figure 4 illustrates the device in a second step, and Figure 5 illustrates a top view of the device of Figure 2.

20

Figures 1 and 2 schematically illustrate a device according to the invention for sequentially removing layers of timber from a package of timber, after which the timber of the layer is divided in one piece.

::: 25 · _ According to the invention, it comprises a 2-pack of timber package. 2, see also Fig. 2 for a more detailed description of the * packet elevator. The packet elevator is arranged to hold the top timber layer 'go 1' at a predetermined level before the layer is removed. After one layer is removed, the packet elevator 6 is adapted to raise the packet 2 such that the top layer is at a predetermined level. Still there is a top tree. a vacuum lifting apparatus 35 for removing the cargo layer 21. The vacuum lifting apparatus, illustrated in more detail in Figure 3, comprises a frame 3 or the like which supports a certain number of suction cups or suction points forming a suction plane 4 to be absorbed by the timber * 1; wherein the frame moves between the first position where the suction plane 4 is located on the lumber pack 2, see Figure 3, and the second position where the suction plane 4 is located above the feed end of the first transverse conveyor 5, see Figure 4.

In the transport direction, behind the first transverse conveyor 5 is a second transverse conveyor 22 and a roller conveyor 23 for aligning the ends, downstream of which is a device 10 for dividing the lumps of wood in one piece.

The single dispenser may be located at the inlet end of the sorting site 24 and is of a suitable known type. The timber is then further processed, for example, by screening in box 24.

15

Further, a first transverse conveyor 5 is provided with a third transverse conveyor 25 forming a buffer. In addition, a conveying system is provided for feeding timber optionally from the first transverse conveyor 5 to a second conveyor 22 or a third conveyor 25. The third transverse conveyor 25 is further adapted to or alternatively, downstream from another conveyor. For example, timber can be fed from a third::: 25 conveyor directly to the feed end of a fourth conveyor.

: * ·.. According to a preferred embodiment, said; ·. a transport arrangement such that the first transverse conveyor 5 is rotatable between the inlet position of the second transverse conveyor 22: 30 and the inlet position of the third transverse conveyor 25. Figures 1 and 2 show the second position with solid lines and the second position with dashed lines. Preferably, only the portion 26 of the transverse jet 5 is curved around the joint 27.

35 Alternatively, the first transverse conveyor consists of two conveyors 28, 26, whereby only the conveyor 26 is keyless. In all embodiments, the conveyor bending movement is performed in a known manner with a non-described hydraulic cylinder. Alternatively, another force generating device may be used.

According to a preferred embodiment, said second conveyor 22 and third conveyor 25 are parallel and overlapping, respectively.

The outlet end 29, 36 of the third transverse conveyor 25 is adapted to be lowered to the plane 10 of the second transverse conveyor 22 to transport the timber on the third conveyor to the second conveyor.

According to one embodiment, the entire third conveyor 25 is curved around its inlet end 30, as shown in dashed lines 31 in FIG.

According to an alternative embodiment shown in Fig. 2, a fifth conveyor 36 is rotatable forming a third conveyor output end forming the third conveyor output end. The fifth conveyor 36 is pivotable from a position above the second conveyor 22 to a position where its outlet end is flush with the other conveyor. The first position is shown in Fig. 2 by the dashed lines and the last position is indicated by dashed lines.

'. J 25 In this construction, the third conveyor is not removable, but is fixed.

; . ·. Conveyor bending operations are performed using conventional hydraulic cylinders not known in the art.

i:: 30

If necessary from a buffer point of view, in the same manner as the third conveyor V 'may be placed on the second conveyor V', the conveyor may be provided with one or more conveyors. In this case, the conveyor 26 may be scalable or adjustable to feed timber optionally to three or four overlapping conveyors. Similarly to the above, the timber in the three upper passages may be transported by means of 7 110770 means, such as conveyor 36 corresponding to the conveyors, to another conveyor or an arrangement downstream of the other conveyor.

The apparatus comprises a fourth conveyor 23 located from the second conveyor 22 in the conveying direction. The fourth conveyor 23 has in itself known conveyor-shaped rolls 33 arranged in succession in the conveying direction, which are preferably screw-type. They not only feed the wood sideways, but also the pi-10 in a downward direction towards the rotating belt 34, whereby the logs become the heel end. The rolls feed the timber in a transverse direction at a higher speed than the previous conveyors, whereby the timber which in the previous conveyors is attached to each other and forms a layer of timber 15 is separated in the roll conveyor 23 so that each timber piece is separated from adjacent timber.

Behind said conveyors is a device for single piece wood and wood. It can be of any type and is best located at the 24 inlets of the sorting site.

A: Modern sawmills have a high throughput. For example:; : 25 chips are sorted and transported by roughly 120 logs at a raw sorting or inspection body; ·. lat per minute.

• * t »l.i i With this type of output, the known vacuum lifting systems are:: 30 methods too slow. They cope with approximately six work cycles per minute, i. lift six layers of wood per minute. In the case of wide pieces of timber, each layer may contain as little as seven pieces of timber per layer, giving a minute; 35 per road only about 40 pieces of timber.

If a known vacuum technique were to be used, another problem would arise, namely, the interruptions between each or every layer of the wood pallet 110770 8.

The vacuum lifting device 21 briefly described above has a high power 5 to lift the timber layers of the timber package. This device is described in Swedish Patent Application No. 9,402,670-5 and is described in more detail below.

Fig. 3 illustrates a device according to the patent for lifting a layer 1 of timber package 10 2. The device comprises a known vacuum lifting device of a suitable quality. It comprises a frame 3 which supports a certain number of suction cups and / or suction points forming a suction plane to be adhered to a single layer of timber pieces. The frame 3 moves between the first and 15 second positions as illustrated.

Such vacuum lifting devices are known as several designs. According to a known structure, the suction cups consist of a sealed honeycomb pattern and each valve has a valve. The cells 20 are molded from a cavity into a soft foam rubber sheet about 25 mm thick. The plate is connected to a vacuum pump to generate the required vacuum.

According to the patent, the device is arranged to cooperate with one another; ; : 25 nipples with a well known parcel lift of this type 6, • * <*. which is adapted to support the timber package 2,; that it is inclined against the horizontal, and wherein the package lift is further adapted after removal of the upper timber layer to · lift the timber package so that the top I; ; • 30 layers of timber are on the same level as the removed layer of timber. This known package elevator operates by lowering anyone so that the bottom beams 7 of the elevator are in a plane below the upper surface of the package conveyor 8, after which the timber package is transported to the 35 position shown in Figure 3. on the bottom beams. After that, the bottom bars »·. raise the packet periodically.

i t »: The elevator operates conventionally to raise the package f I · 9 to 110770, where the upper timber layer passes the upper ends of the elevated beams 9 of the elevator, whereby the layer in Fig. 3 slides out of the package obliquely to the right. The packet is then lifted again to a distance corresponding to the thickness of the timber layer and any interveners.

In the timber package, the timber is perpendicular to the plane of the paper of Figure 3. In contrast, the spacers are perpendicular to the pieces of wood. As the timber layer 10 slides out of the package, therefore, the spacers also slide off the spacer receiver 10 and are transported away by the spacer conveyor 11.

According to the patent, said frame 3 is supported by a pendulum 12, which is supported by a base 14 with a pivoting joint 14. The pendulum 12 is adapted to be pivotable by a hydraulic cylinder 15 with respect to the base 13 between these two positions, the first position shown in Figure 3 and the second position shown in Figure 4. forming an angle of the ke-20 frame 3 in the first position against the horizontal plane and thus parallel to the upper timber layer of the timber package as shown in Figure 3. As shown in Figure 4, the second position of the frame 3 substantially coincides with the horizontal plane.

•; : 25 '. t By using the hydraulisy1 Inter and a miniature computer known per se, the pendulum motion can be controlled *. arranges to be accelerated and decelerated optimally to shorten the work cycle without letting the lumber cap loose from the suction cup.

♦ ·: Of course, this motion can be accomplished by other means, a »* V '· such as the use of an electric motor with a ball screw or a crank, ·. : With a comb of a cell or other similar means.

'' * By allowing the timber transferring member from the timber package to the transverse conveyor to make only one movement, namely 10 110770 pendulum movements, the working time is significantly shorter than that obtained by known arrangements using several different movements. The apparatus described can perform at least 10 to 15 work-5 cycles per minute.

The work cycle is performed by placing the pendulum in the position shown in Figure 3, after which the top layer of wood - goods is sucked in. Thereafter, the pendulum is rotated by means of the hydraulic-10 1 to the position shown in Fig. 4, i.e. transverse conveyance above suction. In the position on the transverse conveyor, the vacuum is removed and the timber is lowered to the transverse conveyor 5.

After one layer of timber has been removed from the timber package and the intermediate spacers below have slipped away, the package elevator raises the timber package to a position where the lower surface of the upper timber layer is near but slightly below the upper ends of the upright beams 9. 20 This way the layer of timber is kept in the package. Once the wood backing layer has been sucked in, it is lifted together by means of structural members 17, 18, 19 closer to the frame so that its underside extends above the upper surfaces of the beams 9, where; I created it I can carry away.

25

The vacuum lifting device described is very advantageous for use in the present invention because it provides the same production power as that obtained by conventional stripping of the I * * * * * * [/ lumber pack. Further, * * '·' * 30 solves the problem of handling the interleaves in a conventional manner. However, some other type of vacuum lifting device * may be used provided it has sufficient power.

# * * * * *. *. It was mentioned above that the third transverse conveyor • provides 35 buffers. The combination of the vacuum lifting device and the buffer has a »» * * * very central role in the present invention.

»* * *»

Because the packet change takes time, as mentioned, while the downstream parts 23, 24 need to be continuously fed with wood, the removal of the timber layer must be faster so that sufficient timber pieces can be buffered before the downstream parts can be all the time with uninterrupted maintenance of timber. In the known sorting facilities and inspection centers, certain buffering with an elevator pocket is carried out as previously mentioned. According to the present invention, there are no elevators.

10

In accordance with the present invention, the lumber pieces are fed, in addition to the second conveyor 22, to the third conveyor 25. The number of lumber pieces to be fed to the third conveyor should be sufficient to supply downstream parts with the lumber pieces during packet exchange. The length of the third conveyor 25 must be such that it can contain the number of pieces of timber downstream which are designed to carry during the packet exchange. In this case, the dimensioning of the 20 third conveyors must, of course, take into account the maximum dimensions of the timber present.

When the last pieces of timber in the pack are passed past the point 32 where the third conveyor 25 is in the lowered position; ; : 25 in relation to the second conveyor 22, bend the third conveyor 25 down to the position depicted in dashed lines in Figure 1, followed by the wood over the third conveyor. ) the articles are fed down to another conveyor 22.

I, V

r (i · * * * «*» '30 During this time, a new packet of timber is transported to the parcel lift 6 and the removal of new layers of timber from the new packet begins. The new timber pieces can then be transported by conveyors 28, 26 in elevated position. - conveyor 25 in the lowered position and conveyor 32 * t · i »• 35, or alternatively conveyor 11a 28, 26 in the lowered position <·., and conveyor 32.

»I« * I

»I

However, first, the first conveyor 26 12 11U770 is lowered and the third conveyor is lifted up as soon as the first timber layer of the new packet is left on the first transverse conveyor 5 via a vacuum lifting device.

5 In addition to removing the logs faster than the downstream portions in the time unit, the wageable portion 26 of the first conveyor may alternately transport the logs to the second and third conveyors until the third conveyor is filled with sufficient logging capacity interrupted during switching.

By means of the present invention, which combines a vacuum lifting device with a trailing buffer storage formed by a third conveyor, it is possible to keep the pieces of wood sequentially downstream of the package, where the pieces of wood are further processed. Thus, elevators which are expensive and noisy in addition to damaging lumber pieces are removed. In addition, with the advantageous design, namely the swinging vacuum lifting device and the inclined packet elevator, high power and i; simple handling of dents.

,: * 25

The present invention thus implies not only an improvement in quality but also a lower cost.

»* •» »» * »* f! The above are some examples of embodiments. The invention t * * ti * 30 can of course be modified without departing from the spirit of the invention. Thus, for example, the third conveyor 25 may not be removable, but a separate removable conveyor which, *, may be connected to the output end V 'of the third conveyor. The 1 separate conveyor can be folded down so that it connects the third conveyor output end to the second conveyor. timeen 22. Folding movement of a separate conveyor is performed i

you M

* not known in the known way with a hydraulic cylinder.

»T» i • '* 13 110770

Another type of vacuum lifting device may still be used provided that it has sufficient power. In addition, the one-piece split may be in contrast to the one shown above as the primary. The present invention can, of course, be used independently of the type of reprocessing apparatus that follows the single subdivision. Further, there may be various fittings between the output end of the second conveyor and the one-piece icing arrangement.

Therefore, the present invention should not be construed as limited by the above embodiments, but may be modified within the scope of the appended claims.

15 20 25 • · 30. 35

Claims (11)

1. A method of dividing pieces of wood into a wood package (2) is timber stock (1) successively removed from a wood package, after which the wood pieces in a layer of wood pieces are divided into one, characterized in that package elevator (6) is carried to carry a wood package (2). is brought to hold the topmost wood layer (1) at a predetermined level before the stock is taken off and which package lift after a stock (1) is removed, the package (2) is lifted so that the topmost layer is essentially the predetermined level that the removal of the top wood layer (1) is effected by means of a vacuum lifting device (21) comprising a frame (3) or correspondingly supporting a suction plane (4) for securing a layer (1) of wood pieces, which frame (3) is movable between a vehicle ·. A fixed position where the suction plane is located at the top of the wood package (2), and a second position where the suction plane is located above the input end of a first transverse conveyor (5), that in the transport direction after the first transverse transporter; ; clean (5), there is a second transverse conveyor (22) downstream: a device in which the pieces of wood are caused to be separated into pieces, after which the pieces of wood are further processed by the fact that after the first transverse conveyor (5) there is a third cross conveyor (25) a buffer and that the pieces of wood are caused to be selectively measured from the first cross conveyor (5) on the second. ··· (22) or the third (25) conveyor and that the existing pieces on the third cross conveyor (25) optionally measured to the other transverse conveyor (22) or alternatively to a device downstream of the second conveyor. 110770 Method according to Claim 1, characterized in that said package lift (6) is supported to support the wooden package (2) so that it is inclined to the vertical plane and that said vacuum lifting device (21) causes the upper wood layer 5 (1) in the package to be supported. the input end of the first cross conveyor (5) by performing only one pendulum movement between said first position and said second position. Method according to Claim 1 or 2, characterized in that said second (22) and third (25) transverse conveyors are located parallel to and above each other and that the first transverse conveyor (5) is tiltable between a position where it connects. to the feed end of the second cross conveyor (22) and a position where it connects to the feed end of the third cross conveyor (25) so as to cause the wood pieces to be selectively conveyed to the second or third cross conveyor. Method according to claim 1, 2 or 3, characterized in that the output end of the third cross conveyor (25) is lowered to the level of the second cross conveyor (22) to transport the pieces of wood lying on the third cross conveyor (25). the second transporter (22). . * 25 * t · 5. A method according to claim 1, 2, 3 or 4, characterized in that the leveling is effected by means of a fourth transverse conveyor (23) with inclined rollers located in the transport direction after the second transverse conveyor (22), the fourth transverse conveyor. has higher transport speed than the other ·. the cross conveyor and that a one-piece split takes place downstream of the fourth conveyor. 6. Device for dividing pieces of wood into one piece. . A wood package (2) wherein wood stock (1) is successively removed from a wood package, after which the wood pieces are divided into a layer of wood pieces, characterized in that a package of elevator (6) is provided to support a wood package (2), which package lift is arranged to hold the top wood layer (1) at a predetermined level before the layer (1) is removed and which package lift after a bearing is removed is arranged to lift the package (2) so that the top 5 the bearing (1) is substantially at the predetermined level that a vacuum lifting device (21) is provided for the removal of the top timber bearing, the vacuum lifting device comprising a frame (3) or correspondingly supporting a suction plane (4) to attach a layer (1) of 10 pieces of wood, which frame is movable between a first position where the suction plane is located at the top of the wood package (2) and a second position where the suction plane is located above the feeding end of a first cross conveyor (5), that in the transport direction after the first cross conveyor (5) there is a second cross conveyor (22) downstream of which a device where the pieces of wood are caused to be divided into pieces, after which the pieces of wood are further processed, the first cross conveyor (5) is furthermore provided with a third cross conveyor (25) constituting a buffer and by the fact that a transport device is provided for optionally feeding wood pieces from the first cross conveyor (5) to the second (22) or the third conveyor (25) and that a third (25) cross conveyor is arranged to feed on the existing pieces of wood to the other transverse conveyor (22) or alternatively to a device>%, downstream of the second conveyor. ♦ i Device according to claim 6, characterized in that said packet elevator (6) is arranged to support the wooden package 30 (2) so that it is inclined to the vertical plane and in that said 'in (' vacuum lifting device (21) is arranged to carry the topmost 1). The wood layer (1) in the package to the input end of the first cross conveyor (5) (5) by performing only one pendulum movement between said first position and said second position. Device according to claim 6 or 7, characterized in that: said second (22) and third (25) transverse conveyors are located parallel to and on top of each other, and of said first transporter (5) being tiltable between a position where it connects to the input end of the second cross conveyor (22) and a position where it connects to the input end of the third cross conveyor (25). 5 9. Device according to claim 6, 7 or 8, characterized in that the input end of the third cross conveyor (25) is arranged to be lowered to the level of the second cross conveyor (22) to transport the pieces of wood lying on the third cross conveyor (25). the second transporter (22). 10. Device according to claim 6, 7, 8 or 9, characterized in that a fourth transporter (23) is located in the transport direction after the second transporter (22), which fourth transporter has inclined rollers and a higher transport speed than the other. the transporter, whereby an equalization of the pieces of wood takes place. Device according to any of claims 6 to 10, characterized in that said vacuum lifting device (3) is supported by a pendulum (12) which is supported by a frame (13), by the pendulum (12) being arranged by means of a * hydraulic cylinder (15) the pivot (13) is pivoted between! The two aforementioned positions, in that the suction plane (4) in the first position of the frame (3) forms an angle to the horizontal plane and is parallel to the top wood layer (1) in a wood package supported by the package lift and that the suction plane (4) in the second position of the frame (3) substantially coincides with the transporter (5) piano. t »t i f | I I »»