WO2013159891A1

WO2013159891A1 - Saw device and method for sawing pieces of wood

Info

Publication number: WO2013159891A1
Application number: PCT/EP2013/001184
Authority: WO
Inventors: Bernhard Ochs
Original assignee: Bernhard Ochs
Priority date: 2012-04-28
Filing date: 2013-04-22
Publication date: 2013-10-31
Also published as: DE102012008624A1

Abstract

In order to improve and simplify the cutting of pieces of wood into smaller logs, the invention provides a saw device with a sawing table and a saw band, a wood feeder with hold-down means, and a saw feeder. A method for sawing pieces of wood into individual logs by means of a bandsaw is also characterised in that a piece of wood placed on a sawing table is moved by means of a wood feeder against a stop, the piece of wood is pressed against an abutment by the hold-down means and then a saw is advanced, sawing through the piece of wood, by means of a saw feeder.

Description

Sawing device and method for sawing wood pieces

The invention relates to sawing device with a saw table and a revolving saw band and a method for

Sawing wood pieces into logs by means of a saw band.

For use as firewood planned wood in the form of branch, but also pieces of trees, in the forest with chainsaws to a stackable length of usually about 1 m

sawed, with thicker pieces of wood (trunks) are also split into pieces of wood with smaller transverse dimensions, in particular pieces of wood with a diameter of more than 8 cm. The pieces of wood prepared in this way are then stacked in stacks and stored on the spot in the forest for about 1 1/2 years for drying. This often happens to be more remote

Set away from daily power supply. to

Use as firewood, the said, about 1 m long pieces of wood must be shortened after the deposition of ovenable logs, which has to be done with a length of preferably between 20 and 33, but in any case less than 40 cm. The shredded logs must be loaded onto a transport vehicle. As a rule, this requires three people at the site.

The invention is therefore based on the object, a

Sawing device for crushing pieces of wood to wood logs for firewood to propose, which is designed simple and robust, at the workplace regardless of 04269 1 electrical power can be used and in particular no more than one person needed for operation and operation. _, The _. The task also includes the .... proposal of a corresponding method for dividing pieces of wood into oven-friendly logs.

According to the invention, the object is achieved by a generic device, which is characterized by actuators in the form of a wood feed, with a pressing device and a

Saw feed.

The automatic timber feed causes it to advance a piece of wood to be sawn against a stop, while the pressing device causes a lateral pressing of the piece of wood against an abutment. The Sägevorschub pushes the piece of wood during sawing through the circulating, but relative to the saw table stationarily arranged saw band.

Timber feed, pressing device and Sägevorschub are designed to carry out the aforementioned Funktonen.

In addition, the task is called by a

Detached method of sawing pieces of wood, which is characterized in that a laid on a sawing wood piece is pushed by a wood feed against a stop, the piece of wood is pressed by means of a pressing against an abutment and then a saw advancing the piece of wood sawn through the saw band passes.

Of course, all actuating units are automatically driven, preferably pneumatically, in particular by means of a pneumatic or pressure Air device with a compressed air tank and a

Compressor. In addition, the actuators are also pneumatic, by the said pneumatic unit - controllable. Alternatively, the saw by a

Electric motor to be driven. The pressure for the

Pneumatics, ie the pressure in the compressed air tank, is effected via the compressor, which can be driven in particular via a power take-off shaft, such as a tractor or tractor, such as may possibly be present in forestry and field work and is used and in particular also for the purpose of transportation the pneumatic sawing device according to the invention, the conveyor and a trolley to the place of use and for transporting the shredded logs by means of the trolley is used to the place of use. The drive of the

Compressor is usually done via the circulation drive of the saw blade by this is mechanically coupled to the PTO and the compressor movement is removed from this.

As a result, the device according to the invention can be used completely independent of location. Such a pneumatic drive and a pneumatic control in particular have the advantages that they are independent of electricity or oil pressure of a hydraulic drive that occur during coupling and uncoupling no loss of hydraulic oil and thereby, as well as other leaks in the necessary hose connections from the compressed air tank no environmental damage to the individual operating units.

According to further preferred embodiments, it is provided that a counteracting the timber feed stop can be moved and / or that the pressing device is arranged on a movable slide. Also is advantageously .. a weiterverfahrbare from the saw blade ■

Provided Abhebeeinrichtung, in which case the operation is carried out automatically and in particular pneumatically and also the control is carried out pneumatically. Further preferred embodiments of the device according to the invention provide that the timber feed has two oppositely acting cylinder-piston units. The stop may advantageously have an attachment to its extension.

The inventive design of the sawing device provides by a pneumatic conveyor with a particular of the compressed air unit pneumatically driven conveyor belt beyond a further advantage, since the transport device for transporting the

Sawn logs can be driven by the sawing device on a trolley through the provided for the sawing device pneumatic unit.

The invention provides in a preferred embodiment of the method according to the invention that the Sägevorschub is released by retracting the stop from the separated log that the residual wood piece is lifted by a lift-off from the saw blade and / or that the saw feed is moved back to its original position. The saw blade is preferably guided around two guide rollers whose axes are directed in parallel.

The timber feed, the movement of the Abhebeeinrichtung to release the saw blade from the remaining piece of wood and the slide movement to move the hold-down takes place parallel to the axes of the circulating shafts of

Saw band and thus perpendicular to the by the circulating

Saw band certain. Level while the stop one

Performs pivotal movement substantially with a main component perpendicular to the circumferential plane of the saw blade. In contrast, the pressing device for the piece of wood is pivoted about a pivot point substantially in a direction parallel to the plane of the band saw blade and the

Saw feed also takes place in the direction of the plane of the saw blade, wherein the two latter directions of movement are substantially opposite to each other.

Further advantages and features of the invention will become apparent from the claims and from the following description in which an embodiment of the invention

Device is explained in detail with reference to the drawing. Showing:

Fig. 1 is a schematic representation of the

entire system with one

sawing device according to the invention;

Fig. 2 is a schematic representation of a

Top view of the invention

sawing;

Fig. 3 is a schematic representation of a

Side view of the sawing device according to the invention in the direction of the arrow III of FIG. 1;

Fig. 4 is a schematic representation similar to FIG. 2 in another position of functional elements of

sawing device according to the invention; and Fig. 5 is a pneumatic plan of

Device according to the invention.

The sawing device 1 according to the invention has a

Saw table 2 and a driven revolving saw band 3 on. This can be driven electrically or via mechanical couplings from the power take-off of a tractor, tractor or the like. Furthermore, a compressed air tank 4 is provided, which is filled via a compressor 5.

Further, a saw feed is of the sawing device 1 in the illustration of FIG. 1 1.1 understood to be pressed with the zer ^¬ to be sawn pieces of wood 6 to the sawing by the circulating band saw blade. 3

The sawing device 1 is followed by a chute 7, over which the sawn pieces of wood fall on a conveyor 8, from which they are conveyed by means of a conveyor belt 9 to a trolley 10. The conveyor 8 with the conveyor belt 9 can also pneumatically via compressor 5 and compressed air tank. 4

be driven. By the pneumatic drive an autonomous system is created, so that the sawing device 1 according to the invention, but also the conveyor 8 at any arbitrary

Space, especially independent of stationary

Power supply, such as power connections, can be used, the compressor, for example, by a

Internal combustion engine (oil, diesel, gas), but also can be driven by stored in an electrical energy storage electrical energy. Preferably, the compressor 5 from the PTO of a

Tractor or tractor. _, - _. in ... usually via the rotary drive of the saw blade - driven, which anyway on

Drive location is present.

The sawing device 1 according to the invention has the following actuating elements, which are each formed by a piston-cylinder arrangement:

On the one hand, the already mentioned saw feed 1.1 is shown in FIG. 2, which moves the piece of wood to be sawn transversely through the revolving saw band so that it can saw the piece of wood.

On a saw table 2, a timber feed 6.1 is further provided which has a double cylinder with two counter-acting single cylinders 6.11, 6.13 to ensure the large stroke for conveying a starting piece of wood, which usually in three or four logs 6a of about 25 or 30 cm in length is divided. In this case, a first piston 6.12 of the first cylinder 6.11 is arranged with its free end stationary on the saw table 2, while the

Cylinder 6.11 with a parallel second

Cylinder 6.13 by the first cylinder-piston unit 6.11, 6.12 is movable and a piston 6.14 of the second

Cylinder 6.13 via an adjustable stop 6.15 acts on a wooden stop plate 6.16, by means of which at

Actuation of the cylinder 6.11, 6.13 of the feed of the

Wood piece 6 is effected.

Next to the timber feed 6.1 and parallel to this a slide 5.1 is provided, which is a pressing means 3.1 moves parallel to the movement of the piece of wood 6, over which the piece of wood 6 is pressed during the sawing operation against a lateral stop. A piston 3.12 of the pressing device 3.1 presses two hold-down 3.13, 3.14 via a rigidly connected to them in fixed relation to the free end of the piston 5.12 of the slide 5.1 at a joint 3.15 hinged lever 3.16 while sawing through the piece of wood 6 against this and this against it Attack.

Furthermore, a lifting device 2.1 is provided. This has a lifting carriage 2.13, by means of which a starting piece of wood 6 can be lifted by separating a log 6.1 from the saw blade 3 in the direction of extension of the piece of wood 6 against the movement of the timber feed 6.1, for example, 20 to 30 mm, so that thereby the Saw feed 1.1 can be moved back to its original position, in order to divide the starting piece of wood 6 - after feeding - a further time in the following.

With the lifting carriage 2.13 is still on the side facing away from the wood feed 6.1 side of the saw band 3 connected by springs 2.14 connection plate 2.15 connected under the action of the pressing device 3.1 - on the piece of wood 6 - biased springs 2.14 after separation of the log 6a and thus release or relief of the springs 2.14 the log 6a laterally from its sawing position on the chute 7 (Fig. 1) abuts.

Finally, an anchor device 4.1 is provided which provides a stop for the by the timber feed 6.1 advanced wood to be deposited 6 forms and this purpose a by a cylinder 4.11 acted piston 4.12 carried by a spring 4.14 - biased stop plate

4.13 forms an abutment for the wood piece 6 to be deposited. In this case, the stop plate is 4.16 withdrawn by the stopper 4.1 upon actuation of the lifting device 2.1, so that the separated log 6.a can be lifted from the saw blade 3 without hindrance by the stop plate 6.3. The cylinder may, as here, preferably be a one-sided actuated cylinder spring-loaded in the opposite direction (FIG. 5).

In the embodiment of Fig. 4, the stop plate is provided with an essay 4.15. As a result, logs are produced during sawing 6a, which according to the embodiment of

Fig. 2 are just shorter by the height of the essay 4.15.

Fig. 5 shows the pneumatic plan of the sawing device according to the invention 1. The compressed air tank 4 (Fig. 1) is downstream in a conventional manner a filter regulator 0.2, which a 3/2-way valve with spring return 0.3, via which the other pneumatic units with the pneumatic circuit a basic pressure to be supplied, partially via a distributor 0.4 and via which by means of emergency stop 0.6, the pneumatic power supply of the inventive ^¬ sawing device can be prevented. Furthermore, a basic position switch 0.7 is provided, via which the actuators 1.1 to 6.1 (via output b and inputs b) can be moved to a basic position, and a start switch 0.5, with which the operation of the sawing device according to the invention is started. The individual controls 1.1 to 6.1 (with 1.2 ... 6.2 are inputs of the cylinder of Betätigungs- .einrichtung 1.1 to 6.1 in Fig. 5 designates), as described above with reference to FIGS. 2 to 4, thereby by Switches Sl to S9, as also shown in the cited figures, and pneumatic valves (1.4, 1.5, 2.3, 3.3, 5.3, 6.3, 6.4), pneumatic logic elements (or members 1.7, 2.4, 3.4, 3.5, 6.5, 6.7; Chapters 3.6, 5.4, 6.8, 6.9) and other pneumatic elements (Chokes 1.2, 2.2, 3.2, 5.2, 6.2,

Pressure reducer 1.3, signal interruption 1.6, 3.7). Outputted via the output c for the conveyor belt 9 of the conveyor 8 (Fig. 1). The operation of the sawing device according to the invention takes place as follows:

First, a piece of wood with a usual length of about 1 m is placed on the saw table 2 and thus in the sawing device 1 (FIG. 2). Subsequently, the

Start switch 0.5 (Fig. 5) operated. As a result, the timber feed 6.1 is set in motion. This piece of wood 6 is up to the pre-loaded by a spring 4.14 stop plate 4.13, whereby the switch Sl (2, 4, 5) is actuated (via 5/2-way pulse valve 3.3), wherein the

Slide 5.1 is in the position shown in Fig. 2 described above. This will be the

Hold-down 3.13, 3.16 closed and the wood clamped between hold-downs 3.13, 3.14 in plate 2.14. The operating lever 3.16 for the hold-downs

3.13, 3.14 acts inter alia on the switch S8, which is released in the process described above, whereby the saw feed 1.1 is turned on and the piece of wood from this is closed by the already circulating saw band 3 (via the 5/2-way pulse valve 1.5) and thereby divided, while at the same time the stop .. 4 ... 1. swung back spring loaded.

After sawing through of the wood piece 6 of the switch S2 is operated (in Fig. 2, 5) and the doffing 2.1 advanced to release the saw blade 3 by the saw feed ^¬ 1.1.

The lifting slide 2.1 moves to the right and removes the tensioned wood (to the right of the saw blade) from the saw blade. The switch S3 is thereby released, whereby the

Saw feed 1.1 is back process. The latter finally actuates the switch S5 which, via 3.3-3.6 (FIG. 5), effects an opening of the hold-down device 3.13, 3.14, a return procedure of the lift-off carriage 2.1 (or 2.3, FIG. 5) and a forward movement of the stop 4.1 return to their starting position.

About the actuated by the lifting carriage 2.1 switch S7 continue the hold-down (via the 5/2-way pulse valve 3.3) is opened, causing the switch S6 by means of the 5/2-way pulse valve 6.4 of the wood feed is operated again and the remaining wood piece 6 against the Stop plate 4.13 shifts. As a result, the switch Sl is operated again.

The above-described sawing process is then repeated for the next log to be separated 6a. If the timber feed 6.1 so far pre-process, so that after separating a log 6a separating the

remaining. RestStücks (in the Fig. 2 right-from the saw blade 3) no longer makes sense, if this example has a length of 330 to 400 mm, so moves the timber feed plate 6.16 against a switch provided S4 (in the specific embodiment, a distance to the right of the saw blade should have 370 mm). This causes after separation of the piece of wood 6a in the manner described above initially following different procedure:

First of all, the log to the left of the saw blade is cut off according to the described steps with closing of the hold downs 3.13, 3.14 due to the release of the switch S8, saw feed 1.1 method (for separating the part on the left), retraction of the stop and advancement through S2 of the lift-off carriage

(against the switch S3). Continue to be due to the

Switched switch S4 lifted the hold 3.13, 3.14 and on actuation of the switch S6 their slide 5.1 back together with the holders from the position of FIG. 2 in the position of FIG. As a result, the switch S9 is actuated and also causes a return process of the wood feed 6.1 (5/2-way pulse valve 6.4 and 5/3-way pneumatic valve 6.3). This also makes the switch S4 free again. The saw feed 1.1 is reversed and operates the switch S5. As a result, as described above, the slide 5.1 with the hold 3.13, 3.14 pre-process, the lifting carriage 2.13 zurück- and the stop 4.1 Vorverfahren. The sawing device is then in her

Initial position . The rest of the log is located in a position caused by the saw feed 1.1 position beyond the saw blade. Of the

Saw feed 1.1. itself is, as I said, back in. his initial position method back so that between the rest of wood log and the backward Sägevorschub 1.1 is a free space in which then a new piece of wood to be cut can be inserted. The start button S (Figure 5) may be pressed again and the sawing operation repeated as described above.

An emergency stop N (FIG. 5) is provided by which the sawing device is momentarily shut down. After its operation, the sawing device before restarting by pressing the start button S (at

inlaid piece of wood) first via a basic exhibition switch G (Fig. 5) in its basic or

Starting position to proceed.

LIST OF REFERENCE NUMBERS

mechanics

0.7 home position switch

1 sawing device

1.1 saw feed

2 saw table

2.1 Lifting device 2.13 Lifting carriage

2.14 springs

2.15 Connection plate

3 band saw blade

3.1 pressing device 3.12 piston

3.13, 3.14 Downholder of 3.1 3.15 Joint

3.16 lever

4 compressed air tanks 5 compressors

4.1 stop

4.11 cylinder

4.12 pistons

4.13 stop plate

4.14 spring

4.15 essay

4.16 stop plate

5.1 slide

5.12 piston

6 pieces of wood

6a log

6.1 Hol zvorschub

6.11, 6.12; 6.13, 6.14 Cylinder-piston unit 6.15 stop

6.16 Wooden stop plate

7 slide

8 conveyor

9 conveyor belt

10 transport vehicles

Pneumatics

0.2 filter regulator

0.3 Spring return division

0.4 distributor

0.5 start switch

0.6 emergency stop

1.2 throttle

1.3 Pressure reducer

1.4, 1.5 pneumatic valves

1.6 Signal interruption

1.7 OR gate

2.2 throttle

2.3 Pneumatic valve

2.4 OR gate

3.2 throttle

3.3 Pneumatic valve

3.4, 3.5 OR members

3.6 AND gate

3.7 Signal interruption

5.2 throttle

5.3 Pneumatic valve

5.4 AND gate

6.2 Throttle

6.3 stop plate

6.3, 6.4 Pneumatic valves

6.5, 6.7 OR members 6.8, 6.9 AND-terms

S1-S9 switch

Claims

claims

Sawing device (1 ^" ) with a saw table (2) and a revolving saw band (3) characterized by

Actuators in the form of a timber feed (6.1),

a pressing device (3.1, 3.13, 3.14) and a Sägevorschubs (1.1).

Apparatus according to claim 1, characterized in that the actuating units, in particular

Wood feed (6.1), pressing device (3.1, 3.13, 3.14) and saw feed (1.1) are pneumatically driven, in particular by a compressed air device (4,

5).

Apparatus according to claim 1 or 2, characterized

in that the actuating devices (1.1 to

6.1) are pneumatically controlled.

Device according to one of the preceding claims, characterized in that the wooden feed (6.1) counteracting stop (4.1) is zurückschwenkbar.

Device according to one of the preceding claims, characterized in that the pressing device (3.1, 3.13, 3.14) are arranged on a movable slide (5.1).

Device according to one of the preceding claims, characterized by a saw band (3) Continuable lifting carriage (2.1.).

7. Device according to one of the preceding claims,

characterized in that the timber feed (6.1) has two oppositely acting cylinder-piston units (6.11, 6.12, 6.13, 6.14).

8. Device according to one of claims 4 to 7,

characterized by an attachment (4.15) to

Extension of the attack (4.1, 4.13).

9. Device according to one of claims 2 to 8, characterized in that the compressed air device (4, 5) has a compressed air tank (4) and a compressor (5).

10. Device according to one of claims 2 to 9,

characterized by a pneumatic

Conveyor (8) with a particular of the compressed air unit (4, 5) pneumatically driven

Conveyor belt (9).

11. A method for sawing pieces of wood by means of a band saw (3), characterized in that a piece of wood placed on a saw table (2) by means of a timber feed (6.1) is pushed against a stop (4.1, 4.13),

the piece of wood (6) by means of a

Pressing device (3.1, 3.13, 3.14) against an abutment (2.13) is pressed and then a saw feed (1.1), the wood piece (6) sawing through the saw band (3) moves through.

A method according to claim 11, characterized in that the saw feed (1.1) is released by retracting the stop (4.1, 4.13) from the separated log 6a.

A method according to claim 11 or 12, characterized

in that the remaining piece of wood is lifted off the saw band (3) by a lifting device (2.1).

Method according to one of claims 11 to 13, characterized in that the saw feed (1.1) is moved back to its initial position.

Method according to one of claims 11 to 14, characterized in that the movements of the

Actuating devices (2.1, 3.1, 4.1, 5.1, 6.1), in particular the saw feed (1.1), the

Pressing movement of the wood piece (6) against an abutment by a pressing device (3.1, 3.13, 3.14), the release movement of the stop (4.1, 4.13) and the release movement of the lifting device (2.1)

done pneumatically.

Method according to one of claims 11 to 15, characterized in that the movements of the

Actuators (2.1, 3.1, 4.1, 5.1, 6.1), the

Saw feed (1.1), the pressing movement of the wood piece (6) against an abutment by a pressing device (3.1, 3.13, 3.14), the release movement of the stop (4.1, 4.13) and the release movement of the

Lifting device (2.1) are pneumatically controlled.