EP1349715A1 - Vorrichtung und verfahren zur handhabung von stämmen - Google Patents
Vorrichtung und verfahren zur handhabung von stämmenInfo
- Publication number
- EP1349715A1 EP1349715A1 EP01999466A EP01999466A EP1349715A1 EP 1349715 A1 EP1349715 A1 EP 1349715A1 EP 01999466 A EP01999466 A EP 01999466A EP 01999466 A EP01999466 A EP 01999466A EP 1349715 A1 EP1349715 A1 EP 1349715A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conveyor
- saw
- log
- crosscut
- logs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
- B27B5/16—Saw benches
- B27B5/18—Saw benches with feedable circular saw blade, e.g. arranged on a carriage
- B27B5/185—Saw benches with feedable circular saw blade, e.g. arranged on a carriage the saw blade being carried by a pivoted lever
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B1/00—Methods for subdividing trunks or logs essentially involving sawing
- B27B1/002—Methods for subdividing trunks or logs essentially involving sawing by cross-cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B29/00—Gripping, clamping, or holding devices for the trunk or log in saw mills or sawing machines; Travelling trunk or log carriages
- B27B29/02—Clamping angles; Gripping equipment thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B31/00—Arrangements for conveying, loading, turning, adjusting, or discharging the log or timber, specially designed for saw mills or sawing machines
- B27B31/006—Arrangements for conveying, loading, turning, adjusting, or discharging the log or timber, specially designed for saw mills or sawing machines with chains or belts
Definitions
- the present invention relates to the handling of logs and, more precisely, to a method and an apparatus for a quicker and more effective handling of logs in a crosscut saw and in its vicinity.
- logs are kept in a tank incubator, where the logs are in water at a temperature of about 60°C to become soft. From there, the logs are lifted one by one or in small bundles onto a front table, using a crane/log loader. From the front table, the logs are transferred transversely onto a breaker table, the purpose of which is to break the high log bundles into lower layers. After the breaker table, the logs are transferred to a feeder log hoist, which guides the logs individually onto a longitudinal conveyor so that, when moving onto the longitudinal conveyor, the logs are sequentially as close to one another as possible.
- This longitudinal conveyor conveys the logs to a bark-stripping machine, where the logs are stripped and, from there, another longitudinal conveyor conveys the stripped logs further to a measurement conveyor.
- the log On the measurement conveyor, the log is accurately measured, and the data on the log is recorded in a computer.
- the values to be measured include, among others, length, diameter, ovality, angle of taper, springing, crooked-growth, surface contour, etc.
- the timber volume and optimum use in further processing are calculated, among others. Furthermore, grading is carried out and defects in the butt end and the like are observed. After measurement, the logs are pushed transversely to a roadside landing.
- the order of logs must not be changed any more, because then the log-specific data measured by the measurement conveyor gets mixed up.
- the logs are transferred individually onto the longitudinal conveyor.
- the conveyor takes the logs through a metal detector, and if there are any metal particles in the log, these parts are removed from the log automatically or manually using the crosscut saw.
- the longitudinal conveyor typically, a chain conveyor, brings the logs from the metal detector to the crosscut saw, which typically is a circular saw.
- the end of the log is driven past the crosscut saw blade against a mechanical detent behind it.
- detents available for cutting pieces of different lengths on the basis of the data obtained from the measurement conveyor.
- detents There are also movable detents, the location of which can be changed, so that a block of a correct size can be cut from the log.
- the conveyor that comes to the crosscut saw and leaves from there is stopped for the time of sawing.
- the log is firmly gripped with pliers.
- the pliers are located both before and after the saw.
- the mechanical detent is removed and, after disengaging the pliers, the cut log is moved forward to further processing, using the longitudinal conveyor after the saw.
- the detent is returned to its place and the remaining log is driven against it for cutting a new block.
- the remaining piece of log is dropped through a slot between the conveyors and next to the crosscut saw to the collection point below the conveyor. If the piece of log is longer than the existing slot, it is possible to enlarge the slot by turning downwards by 90° the pivoted conical roller parts, which are located before and/or after the crosscut saw.
- the apparatus and the method according to the present invention provide a solution to the problems described above, and the following advantages.
- the apparatus according to the invention speeds up log handling by implementing a more stable longitudinal conveyor solution and design of the conveyor that comes to the crosscut saw, a proactive and optimising crosscut saw, a movable conveyor subsequent to the crosscut saw, and cutting without a detent.
- These solutions which are described in detail hereinafter, provide, among others, acceleration of the production and a decrease in noise and the waste of material.
- the apparatus and the method according to the invention are characterized in that, which is presented in the claims hereinafter.
- FIG. 1 shows a drawing in principle of longitudinal conveyors and a crosscut saw as viewed from the side
- Fig. 2 shows a partial enlargement of Fig. 1, wherein part of the chain structure of the longitudinal conveyors is viewed from the side,
- Fig. 3 shows a cross section of the longitudinal conveyors in accordance with the section I-I of Fig. 1 ,
- Fig. 4 shows the cross section II-II of Fig. 1, the centring holding pliers being preferably located next to the cross-section,
- Fig. 5 shows the cross section III-III of Fig. 1, the presses preferably being located next to the cross section
- Fig. 6 shows the crosscut saw as viewed from the side to the direction of sawing
- Fig. 7 shows the crosscut saw waiting for cutting
- Fig. 8 shows the crosscut saw in the extreme position after cutting.
- Fig. 1 shows a drawing in principle of longitudinal conveyors 1, 2, and 3, and a crosscut saw 4.
- a log 5 is moved to the crosscut saw 4, and the conveyors 2 and 3 and, as necessary, also the conveyor 1, are stopped so that the selected cutting point of the log is next to the blade of the saw 4.
- the cutting point is automatically calculated on the basis of the data coming from the measurement conveyor (not shown in the figure) by means of a computer.
- the computer program calculates one or more alternatives for the log 5 for cutting the blocks.
- the user of the apparatus who is in the immediate vicinity of the crosscut saw 4, selects any of the alternatives, or (s)he also has the opportunity to cut the log 5 in accordance with his own choice. In that case, the computer program calculates a new optimum use plan for the remaining log.
- the log 5 is moved to the right location with respect to the crosscut saw 4 by driving the end of the log past a photocell (not shown in the figure) located after the saw, whereby the forward movement of the conveyors 1, 2, and 3, and at the same time, also of the log can be stopped in a controlled way.
- a photocell not shown in the figure
- the distance of the photocell from the saw 4 is known, and the displacement measure of the conveyor coming from the pulse detector of the conveyor 3 is added to it, whereby the dimension of the piece of log that has travelled past the blade of the crosscut saw, i.e., the length of the block to be cut, is obtained.
- the conveyor 3 is preferably controlled by means of the feedback provided by a frequency transformer and a cutter location probe, i.e., the pulse detector.
- the longitudinal conveyor 3 and preferably also the other longitudinal conveyors 1 and 2 are composed of parts 7, which are connected by articulation and contain sharp forms 6, the sharp forms of the parts being against the surface of the log 5.
- the parts 7 form a chain-like structure, on which the log 5 rests, and which is used to move the log forward in a controlled way.
- the sharp forms 6 are preferably spikes or barbs, which prevent the log 5 from sliding with respect to its direction of motion, and it is possible to measure the location of the end of the log with respect to the crosscut saw 4 by using the photocell and the pulse detector of the conveyor 3.
- Fig. 3 one preferred embodiment of the longitudinal conveyors 1, 2, and 3 is described as a cross section I-I of Fig. 1, wherein the chain-like structures combined from the parts 7 are located in a group of a V-shape.
- the spikes 6 together with the preferably V-shaped cross section of the group formed by the chain-like parts of the conveyors 1, 2, and 3 described herein contribute to a more stable forward transportation of the log 5.
- the more stable transportation and cutting without a detent also provide a lower noise level compared with prior art.
- Fig. 4 shows the cross section II-II of Fig. 1.
- Holding pliers 8, which are not shown in Fig. 1, are located next to the cross section II-II.
- the holding pliers 8 are used to centre the log 5 on the middle of the longitudinal conveyor 2 during cutting.
- the holding pliers 8 are fitted on both sides of the longitudinal conveyor 2 above it, so that they are pivoted on bearings to the body of the longitudinal conveyor at their upper parts, and interconnected by means of their tooth systems of the tooth system.
- one hydraulic cylinder 9 a uniform compression is provided due to the tooth system, which interconnects the holding pliers 8, on both sides of the log 5, whereby it moves to the middle of the conveyor 2.
- the design of the holding pliers 8 at their lower parts is preferably implemented in accordance with Fig. 4, so that the holding pliers are capable of effectively centring the logs 5 of all diameters, which come to the saw 4, on the middle of the conveyor 2, so that no lateral movement of logs is allowed to happen.
- the contact surface of the holding pliers 8, which comes against the log, is provided with a serrated pattern to improve adhesion.
- Fig. 5 shows the cross section III-III of Fig. 1. Presses 10, which are not shown in Fig. 1, are located next to the cross section III-III. The presses 10 are fitted on both sides of the longitudinal conveyor 3 so that they are attached by bearings to the body of the longitudinal conveyor at their other ends.
- the presses 10 preferably press the log 5, which is centred by the holding pliers 8, against the longitudinal conveyor 3 for the time of cutting the log.
- the ends of the presses 10 on the side of the log 5 and opposite to the bearing are designed so that they are capable of effectively pressing logs of all sizes, which come to the saw 4, against the conveyor 3.
- the design is preferably the shape of a butter-knife, the surface of which coming against the logs 5 is provided with a serrated pattern.
- the log 5 is compressed against the conveyors 2 and 3 by means of the holding pliers 8 or the presses 10 located either before the saw 4 and/or after the saw, being correspondingly presented in Figs. 4 and 5.
- One preferable embodiment locates the centring holding pliers 8 before the saw 4 and the presses 10 after the saw.
- Fig. 6 shows a drawing in principle of the crosscut saw 4 of Fig. 1.
- the saw 4 is mounted by a bearing to the framework at its centre of gravity 12 and it is preferably moved to and fro by means of a hydraulic cylinder 13, which is attached between the frameworks and the saw, on the basis of the data coming from the measurement conveyor in accordance with an arrow 14.
- the blade 15 of the saw 4 is preferably rotated by means of an electric motor 16 in accordance with an arrow 17.
- the electric motor 16 is located above the bearing 12, whereby it balances the mass of the blade 15.
- Figs. 7 and 8 show in detail the operation of the crosscut saw 4, when the log 5 is cut.
- the blade 15 of the saw is already at the right distance 18 from the surface of the log, waiting for the cutting in accordance with Fig. 7.
- the data on the thickness of the log 5 at the cutting point comes from the measurement conveyor.
- the saw 4 starts to cut so that, in the beginning, the feed of the saw blade 15 is at its maximum, and it slows down, when approaching the maximum length of the cutting line, after which the blade feed is again accelerated. In this way, blocking and a possible seizure of the blade 15 are prevented in the vicinity of the longest cutting line, when cutting thick logs 5.
- the saw blade 15 After cutting the log 5, the saw blade 15 is not driven to its extreme position, which is enabled by the movement of the hydraulic cylinder, but on the basis of the data obtained from the measurement conveyor, immediately after the log has been cut, the saw blade returns to wait for the next cutting at the proper distance 18 from the surface of the log. In connection with cutting, the blade 15 of the saw 4 moves by a dimension 19 only in accordance with Fig. 8, without the blade having anything to cut. When there is no need to drive the blade 15 from one extreme position to another, but the blade is only moved for the distance required by the cutting, this procedure saves the time taken by the cutting. While the preceding log 5 is still being cut, the next log is driven by the conveyor 1 to be ready and waiting as near the conveyor 2 as possible, which leads to the saw 4.
- the length of the conveyor 2, which leads to the saw 4 is optimised in accordance with the maximum length of the block, and the length of the conveyor 1 is optimised in accordance with the maximum length of the log 5.
- a waste piece remains of the log 5, which must be removed from the conveyor 2 after the last cutting. This is carried out by dropping it through a slot between the conveyors 2 and 3 on both sides of the crosscut saw 4 to a collection point below the saw.
- the slot has been increased by means of conical roller parts, which turned downwards by 90°. The parts were located before and/or after the saw.
- the waste piece is preferably removed by means of the conveyor 3, which is mounted to move in the longitudinal direction.
- the conveyor 3 which is located after the saw 4, forward by preferably about 0.3 m, whereby the slot between the conveyors 2 and 3 next to the saw increases, and the waste piece of the log 5 has enough room to drop to the collection point under the crosscut saw.
- the conveyor 3 is moved forward fully automatically, programmed by the computer, and the conveyor returns back to its extreme position near the saw 4 to wait for the next log 5. Moving can take place so that there is no next log 5 yet on top of the conveyor 3, or that the next log is already on the conveyor or moving onto it, whereby the rotational speed of the conveyor chains are adjusted as necessary by means of the frequency transformer.
- the solution according to the invention provides a quicker handling of logs next to the crosscut saw. This is made possible by decreasing the distance between the logs, when coming to the cutting, because the next log can be driven by the conveyor to be already waiting near the end of the previous log.
- Another accelerating factor is the optimised movement of the crosscut saw regarding the cutting movement and the saw feeding; both it and the saw are already waiting in the right place, when a log of a certain size comes to the cutting.
- a third factor is to implement measurement without a detent, whereby there is no need to drive the log against the detent. When driving against the detent, the log often bounces towards the detent before settling sufficiently near. In measurement without the detent, the log can be made to settle in the right place with a smaller tolerance and in a controlled way, and it can be cut faster.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacture Of Wood Veneers (AREA)
- Packaging Of Special Articles (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Special Conveying (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20002683 | 2000-12-07 | ||
FI20002683A FI20002683A0 (fi) | 2000-12-07 | 2000-12-07 | Laitteisto ja menetelmä tukkien käsittelyyn |
PCT/FI2001/001067 WO2002045925A1 (en) | 2000-12-07 | 2001-12-07 | Apparatus and method for handling logs |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1349715A1 true EP1349715A1 (de) | 2003-10-08 |
EP1349715B1 EP1349715B1 (de) | 2007-02-14 |
Family
ID=8559664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01999466A Expired - Lifetime EP1349715B1 (de) | 2000-12-07 | 2001-12-07 | Vorrichtung und verfahren zur handhabung von stämmen |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1349715B1 (de) |
AT (1) | ATE353743T1 (de) |
AU (1) | AU2002217173A1 (de) |
DE (1) | DE60126662D1 (de) |
FI (1) | FI20002683A0 (de) |
WO (1) | WO2002045925A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI111183B (fi) * | 2002-05-21 | 2003-06-13 | Timberjack Oy | Menetelmä metsätyökoneen moottorin ohjauksessa ja metsätyökone |
DE102004010334A1 (de) * | 2004-02-24 | 2005-09-08 | GreCon Dimter Holzoptimierung Süd GmbH & Co. KG | Verfahren zum Sägen von Hölzern |
FI118725B (fi) * | 2004-08-19 | 2008-02-29 | Veisto Oy | Pyörösaha, jossa on teräohjain |
CN102672765B (zh) * | 2012-05-23 | 2015-03-11 | 厦门大学 | 圆木条旋纹加工装置 |
CN104149133B (zh) * | 2014-07-27 | 2016-03-02 | 马晓权 | 一种分切式木材切割机 |
RU2572561C1 (ru) * | 2014-07-29 | 2016-01-20 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный лесотехнический университет имени Г.Ф. Морозова" | Способ раскряжевки хлыстов |
AT517908B1 (de) * | 2015-10-20 | 2017-10-15 | Posch Gmbh | Brennholzsäge-Einrichtung |
GB2543795B (en) * | 2015-10-28 | 2017-11-01 | Poundfield Products Ltd | Manufacture of pre-stressed concrete members |
CN108748405B (zh) * | 2018-08-29 | 2023-08-08 | 国家***北京林业机械研究所 | 一种智能化锯竹设备 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE392683B (sv) * | 1969-03-15 | 1977-04-18 | Linck Maschf & Eisen | Inmatningsverk for trebearbetningsmaskiner |
DE3511272A1 (de) * | 1985-03-28 | 1986-10-09 | Oesterle, Hans, 7296 Glatten | Ablaenganlage zum massgenauen ablaengen und ablaengverfahren |
CA2305850C (en) * | 1994-08-29 | 2004-08-24 | Robert James Murray | Method and apparatus for bucksawing logs |
SE9703236L (sv) * | 1997-09-09 | 1999-03-10 | Rolf Modd | Anordning för drift av ett bearbetningsaggregat |
-
2000
- 2000-12-07 FI FI20002683A patent/FI20002683A0/fi unknown
-
2001
- 2001-12-07 AU AU2002217173A patent/AU2002217173A1/en not_active Abandoned
- 2001-12-07 DE DE60126662T patent/DE60126662D1/de not_active Expired - Lifetime
- 2001-12-07 WO PCT/FI2001/001067 patent/WO2002045925A1/en active IP Right Grant
- 2001-12-07 AT AT01999466T patent/ATE353743T1/de not_active IP Right Cessation
- 2001-12-07 EP EP01999466A patent/EP1349715B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0245925A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2002045925A1 (en) | 2002-06-13 |
EP1349715B1 (de) | 2007-02-14 |
FI20002683A0 (fi) | 2000-12-07 |
DE60126662D1 (de) | 2007-03-29 |
ATE353743T1 (de) | 2007-03-15 |
AU2002217173A1 (en) | 2002-06-18 |
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