EP0418174A1 - Vorrichtung zum Schneiden von länglichen Holzstücken in kleinere Stücke - Google Patents

Vorrichtung zum Schneiden von länglichen Holzstücken in kleinere Stücke Download PDF

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Publication number
EP0418174A1
EP0418174A1 EP90420398A EP90420398A EP0418174A1 EP 0418174 A1 EP0418174 A1 EP 0418174A1 EP 90420398 A EP90420398 A EP 90420398A EP 90420398 A EP90420398 A EP 90420398A EP 0418174 A1 EP0418174 A1 EP 0418174A1
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EP
European Patent Office
Prior art keywords
bearing surface
wood
chain
pieces
cut
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.)
Withdrawn
Application number
EP90420398A
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English (en)
French (fr)
Inventor
Roger Bosson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0418174A1 publication Critical patent/EP0418174A1/de
Withdrawn legal-status Critical Current

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    • 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
    • B27B5/22—Saw benches with non-feedable circular saw blade
    • B27B5/228—Cross-cutting automatically laterally-fed travelling workpieces; Reducing lumber to desired lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/006—Accessories specially designed for sawing machines or sawing devices for removing or collecting chips
    • 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
    • B27B25/00—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees
    • B27B25/04—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed chains or belts

Definitions

  • the present invention relates to devices for cutting elongated pieces of wood, for example pieces of firewood.
  • the pieces of firewood are generally stored in the form of pieces of 1 meter to 2 meters in length. They must then be cut into shorter sections. Preferably, the length of the sections must be less than the size of the stoves in which the wood is intended to be burned.
  • the pieces of wood are therefore cut into sections less than 50 centimeters long.
  • the object of the present invention is in particular to automate the positioning and the driving of the pieces of wood, to bring them from a loading station towards the circular saw (s), to hold the pieces of wood during their cutting, and to evacuate the cut sections.
  • the difficulty lies in the fact that the pieces of wood to be cut generally have very diverse geometric shapes: the diameter of pieces of firewood can generally be between 5 and 50 centimeters, the diameter not being constant over the entire length of the piece of wood the piece of wood can also be non-linear, include some growths distributed irregularly over the length.
  • the problem proposed by the present invention is to ensure a correct drive of the pieces of wood, before, during and after their cutting, whatever the geometric irregularities of said pieces of wood, ensuring their correct maintenance for cutting them into sections of determined length. .
  • the drive and the cutting must be done by avoiding as much as possible the jamming of the part on its supports or the saw.
  • the device while avoiding jamming as much as possible, however supports without inadmissible deterioration any jamming which may occur in exceptional cases.
  • jamming is especially avoided when it is desired to cut a piece of wood into more than two sections, which requires the use of at least two circular saws; in this case, one must in particular avoid the jamming of one of the two saws, resulting from the presence of the other saw.
  • the invention has the other advantage of allowing loading in a relatively low position, so that the operator does not have to lift the pieces of wood to introduce them into the device, the introduction being able to be made at relatively low height.
  • the device of the invention makes it possible to evacuate the sections in a relatively high position, allowing for example their direct evacuation in a trailer, on a truck or any other means of subsequent evacuation.
  • the device according to the invention has the further advantage of being very secure, by preventing the user from having direct access to the area occupied by the saw (s).
  • the device of the invention also makes it possible to significantly increase the flow rate, compared with traditional manual operations.
  • the invention comprises a frame comprising a bearing surface on which the timber to be cut can be placed, at least one circular saw blade rotatably mounted along a transverse axis carried by the frame, each blade being housed in a longitudinal saw slot the support surface; rotary drive means ensure the drive of the saw blade for cutting.
  • the support surface is inclined longitudinally relative to the horizontal, defining a low inlet end of the support surface and a high outlet end of the support surface
  • the bearing surface comprises at least one longitudinal guide slot on either side of each saw slot
  • - in each longitudinal guide slot is disposed a continuous guide chain stretched between two end sprockets mounted to rotate according to two transverse rotation shafts, a first end sprocket being disposed in the vicinity of the low surface entry end support, a second end gear being disposed in the vicinity of the upper outlet end of the support surface, the upper strand of guide chain being disposed in the vicinity of the support surface
  • chain drive means cause at least one of the transverse rotation shafts to rotate
  • Each chain carries catches, regularly distributed on the chain according to predetermined spacings defining groups of catches aligned transversely, the catches being oriented outside the closed line defined by the chain, so that the catches of the upper strand chain protrude above the bearing surface and can cause in longitudinal translation pieces of wood arranged transversely
  • the cleats include nent: a substantially flat base wall intended to slide on the support surface of the frame, the base wall being of sufficient length to constitute a surface supporting the piece of wood to be cut in a transverse position, - A rear wall, generally perpendicular to the base wall forming an protruding part of the cleat to drive the piece of wood in longitudinal translation.
  • the chain drive means advantageously comprise a torque limiting device. In this way, if jamming occurs, the drive is interrupted without damaging the drive members.
  • the device according to the invention comprises two main parts, namely the cutting device itself 1, preceded by an input conveyor 2.
  • This device 1 comprises a frame 3 comprising a bearing surface 4 on which the wood 5 to be cut can be placed.
  • the frame 3 carries two circular saw blades 6 and 7 in the form of a disc, mounted to rotate along transverse axes carried by the frame. Each blade is housed in a corresponding longitudinal saw slot made in the bearing surface 4.
  • Rotational drive means not shown in the figures, rotate the saw blades. These means can be identical to those usually used for driving circular saws.
  • the axes of rotation of the two saws are arranged just below the bearing surface 4.
  • the bearing surface 4 is inclined longitudinally relative to the horizontal.
  • the longitudinal direction is defined as being perpendicular to the axes of rotation of the saws 6 and 7.
  • the longitudinal inclination of the bearing surface 4 defines a low inlet end 8 of the bearing surface and a high outlet end 9 bearing surface.
  • the bearing surface includes longitudinal guide slots, on either side of each saw slot.
  • each of the longitudinal slots 10, 11 and 12 is disposed a continuous guide chain such that the chain 15, continuous, stretched between two end sprockets 13 and 14 mounted to rotate according to two transverse rotation shafts.
  • the first end pinion 13 is disposed in the vicinity of the lower inlet end 8 of the bearing surface, the second end pinion 14 being disposed in the vicinity of the upper outlet end 9 of the bearing surface .
  • the upper strand 151 of the guide chain 15 is disposed in the vicinity of the bearing surface 4.
  • Torque limiter chain drive means rotate at least one of the transverse rotation shafts to rotate the chains.
  • the chains are all driven by the same movement.
  • the first end pinions such as the pinion 13 are all mounted on the same transverse input shaft
  • the second end pinions such as the pinion 14 are all mounted on the same transverse output shaft, and are thus rotated at the same speed.
  • Each chain such as the chain 15 carries catches, such as the cleat 16, regularly distributed over the chain according to predetermined spacings.
  • the cleats correspond to one chain to another to define cleat groups aligned transversely.
  • FIG. 2 there can be seen the cleat 16 of a first chain which is aligned with the cleat 17 of the second chain, itself aligned with the. cleat 18 of the third chain.
  • the cleats are oriented outside the closed line defined by the chain. In this way, the tabs of the upper strand 151 of the chain protrude above the bearing surface 4 and can drive in longitudinal translation pieces of wood such as the piece 5 arranged transversely on the bearing surface 4.
  • each cleat comprises a base wall 19 which is substantially flat, intended to slide on the bearing surface 4 of the frame.
  • the base wall 19 has a length L sufficient to constitute a surface supporting the piece of wood 5.
  • the length L must be chosen at least equal to the mean radius of the largest pieces of wood 5 that it is desired to cut with the device .
  • the tabs 16 further comprise a rear wall 20, generally perpendicular to the base wall 19 of which it is integral. The cleat 16 thus forms a right dihedral, as shown in the figure.
  • the upper edge of the rear wall 20 advantageously comprises a rim 21 tending to partially cover a piece of wood 5 which would be disposed on the cleat 16.
  • the cleat 16 is secured to the chain 15 according to a median zone 22 of the base wall 19 , for example by welding or any other means.
  • the chain 15 comprises links such as the link 23 arranged in a substantially vertical plane, and intermediate links such as the link 24 arranged in an orientation substantially parallel to the bearing surface 4.
  • the vertical links such as the link 23 come flush, by their upper branches, at the bearing surface 4, crossing the slot 10.
  • the intermediate links 24 are housed in lower housings 25 hollowed out on either side of the slot 10 at its base , as shown in the figure.
  • the chain 15 is thus guided in the slot 10, the housings 25 preventing its lifting.
  • the chain 15 thus contributes to maintaining the tabs 16, and opposes their lifting away from the bearing surface 4.
  • the rear walls 20 of the lugs 16 form protruding parts of lugs to drive the piece of wood 5 in longitudinal translation on the bearing surface 4.
  • a piece of wood 5 is thus held simultaneously by several lugs arranged in a transverse line.
  • the width of the tabs is chosen so that, when passing near the saws, the tabs do not touch the saws.
  • the device comprises two saw blades
  • a gap E equal to or greater than the diameter of the saws used is usually necessary. This arrangement prevents the piece of wood from getting caught between the saw blades and blocking the blades.
  • the walls avoid any projections of pieces of wood resulting from defective cuts or jamming of the pieces of wood when passing over the saws.
  • One of the side walls 27 also acts as a lateral stop, adapted above the support surface 4, and against which the pieces of wood 5 can be supported during longitudinal translation.
  • the relative transverse position of the side wall 27 and of the saws 6 and 7 determines the lengths of the cut sections.
  • the lateral adjustment of the wall 27 also makes it possible to adapt the device to different uses, for example: by bringing the wall 27 closer to position it about 40 centimeters from the saw 6, and by using two saws, it is possible to cut parts 1.20 meters of wood in three 40 cm sections; by moving the wall 27 away so as to place it 50 centimeters from the saw 6, and by using a single saw, pieces of wood of 1 meter can be cut into two sections of 50 centimeters.
  • the wall 27 can advantageously include convergent and divergent portions: in FIG. 2, an embodiment is shown in which the wall 27 comprises a convergent inlet portion, followed by a central portion parallel to the guide slots, itself followed by a divergent outlet portion. This arrangement appears favorable to preserve the piece of wood a certain freedom and to avoid its jamming during the cut by the saw.
  • a retractable inlet flap 30 closes the lower inlet end 8 of the cutting compartment 29.
  • the inlet flap 30 is pivotally mounted on an upper transverse axis 31 between an exhaust position shown in the figure and a position shutter pivoted down.
  • the lower edge of the flap 30 is free to be pushed back and pivoted towards the upper outlet end 9 of the device by the cleats 16 or by the pieces of wood 5 to be cut.
  • the flap 30 thus allows the passage of the cleats and the pieces of wood, and then returns to the closed position.
  • the flap 30 has a double function: firstly, in the closed position, avoiding projections of pieces of wood or debris towards the lower entry end of the device; by its weight and the resistance it opposes to pivoting, it also tends to press the pieces of wood 5 into the bottom of the cleats 16, to improve their positioning by gravity before sawing.
  • bottom wall 32 oriented at an inclination similar to that of the bearing surface 4.
  • the bottom wall 32 occupies at least the entire area disposed under the saws 6 and 7. It thus provides the lower protection of the device. It also ensures the recovery of sawdust produced by cutting the pieces of wood. Indeed, the sawdust falls on the lower wall 32 and, by the inclination of the wall, the sawdust gradually tends to flow towards the lower inlet end 8 and escapes downwards towards an outlet lower sawdust.
  • the lower wall 32 is advantageously arranged in such a way that the tabs of the lower strand 152 of the chain come to bear slidingly on the lower wall 32. In this way, the tension of the chain is reduced, and a certain amount is thus favored. game of cleats to avoid jamming. In this way, the tabs of the lower chain strand 152 also ensure that the sawdust is drawn towards the lower sawdust outlet.
  • the longitudinal inclination of the bearing surface 4 is advantageously between 15 and 45 degrees.
  • FIGS. 3 and 4 show a possible structure of the lower wall 32.
  • the lower wall 32 comprises upper ribs forming guides for the tabs.
  • the upper ribs 320 and 321 form a channel, the entry of which tapers progressively, into which engage the tabs corresponding to the longitudinal slot 12. This improves the guiding of the tabs, and the evacuation of sawdust. .
  • the device further comprises the inlet conveyor 2.
  • the conveyor 2 is of the chain and crossbar type, and has a substantially horizontal loading area 33 without lateral guidance, followed by 'a guiding and centering zone 34 with converging side walls 35 and 36, to bring the pieces of wood in the vicinity of the low entry end 8 on the bearing surface 4.
  • the loading zone 33 of the conveyor d entry 2 is higher than the lower entry end 8 of the bearing surface 4.
  • An inclined plane 37 is provided between the exit of the entry conveyor 2 and the lower entry end 8 of the support 4. The pieces of wood to be cut coming from the conveyor 2 slide by gravity on the inclined plane 37.
  • the inclined plane 37 has a lower part intended to allow the passage of the tabs 16.
  • the lower part of the inclined plane may include lights arranged es in line with the areas occupied by the longitudinal slots 10, 11 and 12.
  • the transverse bars 38 of the conveyor 2 are driven in longitudinal translation by chains 39, the upper ply of bars being driven towards the device 1, by means of drive not shown in the figures.
  • the device only comprises a cutting device 1, without an input conveyor 2.
  • the device is then relatively simple.
  • the lower inlet end 8 can be relatively low to facilitate the introduction of the pieces of wood without having to lift them too high, while the high outlet end 9 can be relatively high, for example at a height sufficient for the sections escaping by l
  • the high outlet end falls into an evacuation device such as a trailer or other vehicle.
  • the cutting device 1 is then associated with an inlet conveyor 2, and can also be associated with an outlet conveyor, not shown, to move the sections cut from the upper outlet end 9 to 'at another outlet end.
  • the embodiments described above and shown in the figures include two saw blades. It is also possible, according to the invention, to provide a larger number of saw blades, for example 4 or 5 blades, for cutting longer pieces of wood into sections compatible with the admissible lengths in the heating devices.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
EP90420398A 1989-09-13 1990-09-10 Vorrichtung zum Schneiden von länglichen Holzstücken in kleinere Stücke Withdrawn EP0418174A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8912372 1989-09-13
FR8912372A FR2651714A1 (fr) 1989-09-13 1989-09-13 Dispositif pour debiter en troncons des pieces de bois allongees.

Publications (1)

Publication Number Publication Date
EP0418174A1 true EP0418174A1 (de) 1991-03-20

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ID=9385707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90420398A Withdrawn EP0418174A1 (de) 1989-09-13 1990-09-10 Vorrichtung zum Schneiden von länglichen Holzstücken in kleinere Stücke

Country Status (2)

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EP (1) EP0418174A1 (de)
FR (1) FR2651714A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2248643A1 (de) 2009-05-08 2010-11-10 Pol Verschatse Baumstammbrennholzsägevorrichtung
FR2956343A1 (fr) * 2010-02-12 2011-08-19 Asi Ingenierie Poste de decoupe de quartiers de bois de chauffage en buches de longueurs predeterminees ou reglables
CN103612289A (zh) * 2013-12-16 2014-03-05 威海百圣源机械制造技术服务有限公司 阶梯式步进上木机
CN103753651A (zh) * 2014-02-21 2014-04-30 东北林业大学 一种竹材自动上料及调整机构
CN108466324A (zh) * 2018-02-28 2018-08-31 重庆市健隆家具有限公司 一种家具加工生产系统
CN109940210A (zh) * 2019-05-05 2019-06-28 江阴职业技术学院 一种用于小方块剪切的剔除装置
EP3556500A1 (de) * 2018-04-19 2019-10-23 ASI Ingenierie Schneidevorrichtung für holzklotzviertel als brennholz
CN112976166A (zh) * 2021-03-24 2021-06-18 优铠(上海)机械有限公司 木材智能横向锯切系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623559A (en) * 1949-01-24 1952-12-30 George M Gustin Feeding mechanism for woodworking machines
CH382978A (de) * 1961-04-11 1964-10-15 Zemp Fritz Maschine zum Abschneiden von Brett- und Lattenstücken
DE1225840B (de) * 1959-01-21 1966-09-29 Diemer Automatenbau Bodo Dieme Abkuerzsaege, insbesondere zum Abkuerzen von Rohhoelzern
US3722343A (en) * 1971-06-23 1973-03-27 C Cornell Multiple saw lumber trimmer
US4068549A (en) * 1976-12-27 1978-01-17 James Earle Huffman Picker stick feed and sawing device
US4277999A (en) * 1979-09-06 1981-07-14 Conner Eldon C Firewood sawmill
US4319931A (en) * 1980-02-25 1982-03-16 Mills Thomas O Method for notching pallets

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623559A (en) * 1949-01-24 1952-12-30 George M Gustin Feeding mechanism for woodworking machines
DE1225840B (de) * 1959-01-21 1966-09-29 Diemer Automatenbau Bodo Dieme Abkuerzsaege, insbesondere zum Abkuerzen von Rohhoelzern
CH382978A (de) * 1961-04-11 1964-10-15 Zemp Fritz Maschine zum Abschneiden von Brett- und Lattenstücken
US3722343A (en) * 1971-06-23 1973-03-27 C Cornell Multiple saw lumber trimmer
US4068549A (en) * 1976-12-27 1978-01-17 James Earle Huffman Picker stick feed and sawing device
US4277999A (en) * 1979-09-06 1981-07-14 Conner Eldon C Firewood sawmill
US4319931A (en) * 1980-02-25 1982-03-16 Mills Thomas O Method for notching pallets

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2248643A1 (de) 2009-05-08 2010-11-10 Pol Verschatse Baumstammbrennholzsägevorrichtung
FR2956343A1 (fr) * 2010-02-12 2011-08-19 Asi Ingenierie Poste de decoupe de quartiers de bois de chauffage en buches de longueurs predeterminees ou reglables
CN103612289A (zh) * 2013-12-16 2014-03-05 威海百圣源机械制造技术服务有限公司 阶梯式步进上木机
CN103753651A (zh) * 2014-02-21 2014-04-30 东北林业大学 一种竹材自动上料及调整机构
CN108466324A (zh) * 2018-02-28 2018-08-31 重庆市健隆家具有限公司 一种家具加工生产系统
EP3556500A1 (de) * 2018-04-19 2019-10-23 ASI Ingenierie Schneidevorrichtung für holzklotzviertel als brennholz
FR3080316A1 (fr) * 2018-04-19 2019-10-25 Asi Ingenierie Dispositif de decoupe ameliore de quatiers de bois de chauffage
CN109940210A (zh) * 2019-05-05 2019-06-28 江阴职业技术学院 一种用于小方块剪切的剔除装置
CN109940210B (zh) * 2019-05-05 2024-02-23 江阴职业技术学院 一种用于小方块剪切的剔除装置
CN112976166A (zh) * 2021-03-24 2021-06-18 优铠(上海)机械有限公司 木材智能横向锯切系统

Also Published As

Publication number Publication date
FR2651714A1 (fr) 1991-03-15

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